(GPU) is fully automated, installed in an individual container and can be operated at ambient temperatures from -55 to + 45 °C.
1.1. Unit layout
The unit consists of separate functionally completed blocks and assembly units of complete factory readiness, joined together at the site of operation (Fig. 1 and 2).
Turbo unit with gas turbine engine NK-16ST and centrifugal supercharger NTs-16;
- air purification device (ACD);
- silencer of the suction tract;
- suction chamber;
- intermediate block;
- ventilation unit;
- two oil cooler blocks;
- exhaust diffuser;
- exhaust shaft;
- exhaust tract silencers;
- automation unit;
- block of oil units;
- fuel gas filter unit;
- cyclic air heating system;
- fire extinguishing system;
- container heating system.
The basic assembly unit of the unit is a turboblock installed on a monolithic reinforced concrete foundation. Assembly units of the engine exhaust device and the cycle air heating system are installed above the turboblock on a separate support. Air intake for the NK-16ST engine is carried out through an air-cleaning device, silencers, a suction chamber and an intermediate block pipe.
In order to ensure ease of maintenance of the unit, the main components of the oil system are located in a separate block of oil units, and the instruments and panels of the system automatic control unit - in the automation unit.
To increase the compactness of the GPU, the ventilation and oil cooler units are located on the intermediate block and the oil unit block, respectively. To increase the reliability of the NK-16ST engine, a block of fuel gas filters was introduced into the unit. The GPU units are heated with hot air from the general station manifold.
All blocks are connected through flexible adapters, which make it possible to compensate for installation inaccuracies during installation of the unit.
BASIC SYMBOLS................................................................... .......6
1. GAS PUMPING UNIT GPA-Ts-16...................................9
1.1. Unit layout................................................... .........9
1.2. Unit blocks........................................................ ...............10
1.3. Gas turbine engine NK-16ST....................................19
1.4. Supercharger NTs-16................................................... ..........23
2. OIL SUPPLY SYSTEM OF NK-16ST ENGINE ..................29
2.1. Composition of the oil system........................................................ ..thirty
2.2. Operation of the oil system................................................... ..32
2.3. System operating parameters......................................................... 33
3. SUPERCHARGER LUBRICATION SYSTEM NTs-16....................................35
3.1. Composition of the lubrication system................................................... .....35
3.2. System operation........................................................ ...............35
3.3. System operation parameters...................................................38
4. SUPERCHARGER SEALING SYSTEM....................................39
4.1. System composition................................................... ...............39
4.2. Operation of the compaction system...................................................... 39
4.3. System operating parameters......................................................... 41
5. ENGINE CONTROL SYSTEM NK-16ST ...................................42
5.1. Engine starting system........................................................ ....42
5.1.1. Automatic start unit...................................................42
5.1.2. Air starter................................................... .....45
5.1.3. Starter control device...................................45
5.2. Starting fuel gas supply system...................................46
5.3. Fuel gas supply system...................................................46
5.4. Hydromechanical engine protection system against
spinning up the power turbine shaft...................................................48
5.4.1. Power turbine shaft speed limiter......49
5.4.2. Operation of hydromechanical protection...................................50
5.5. Operating mode control system...................................50
5.5.1. Speed controller......................................................... .....51
5.5.2. Gas dispenser........................................................ ...............52
5.5.3. HP shaft speed limiter...................................................55
5.5.4. Operation of the operating mode control system...................56
5.5.5. Control of compressor mechanization elements......58
5.6. Oil control system...................................60
6. AUTOMATIC CONTROL SYSTEM FOR GAS PUMPING UNIT GPA-Ts-16 BASED
MSKU-SS 4510-39............................................ ...........................61
6.1. Purpose......................................................... ...................61
6.2. Specifications.............................................61
6.3. The main functions performed by the MSKU-SS 4510 complex
as part of self-propelled guns................................................... ...............62
6.3.1. Control functions................................................... ...62
6.3.2. Control functions...................................................62
6.3.3. Control functions................................................... ......63
6.3.4. Information functions...................................................63
6.4. Composition of self-propelled guns................................................... ....................63
6.5. Structural scheme complex........................................64
6.5.1. Control device........................................................65
6.5.2. Regulatory device...................................................67
6.5.3. Discrete communication device with the object.................................67
6.6. Means of presenting information...................................68
6.6.1. Operator console................................................... .......68
6.6.2. Control Panel................................................ ....69
6.7. Software package "Argus"...................................................70
6.7.1 Hardware requirements and
software environment........................................................71
6.7.2. Types of information provided...................................71
6.7.3. Screen organization........................................................ ...71
6.7.4. General Alarm Window...................................................72
6.7.5. Terminal................................................. ................73
6.7.6. Terminal windows................................................... .........74
6.7.7. Alarm window................................................... ....74
6.7.8. Analog Parameters Window...................................................76
6.7.9. Analog parameter graph window...................................................78
6.7.10. Group graph window for analog parameters................................79
6.7.11. Characteristics window................................................... ..80
6.7.12. The event log................................................ ......80
6.7.13. Retrosystem........................................................ .........82
6.7.14. Control window........................................................ ......83
6.7.15. Mnemonic diagram window................................................... ....84
6.7.16. Diagnostics window........................................................ ....85
6.7.17. Archive window......................................................... ..........86
6.7.18. Repair of MSKU on a running unit...................................87
7. OPERATION OF THE AUTOMATIC CONTROL SYSTEM......88
7.1. Preparing the self-propelled guns for use...................................88
7.2. Procedure for working with self-propelled guns.................................................... .........88
7.2.1. Working with a PC................................................... ..........88
7.2.2. Operating the control panel...................................................89
7.3. GPU operating modes ................................................................... ..........89
7.3.1. Preparing the gas pumping unit for start-up...................................................89
7.3.2. Checking oil system protection...................................91
7.3.3. Comprehensive inspection of cranes...................................................92
7.3.4. Cold spin......................................................... ...93
7.3.5. Automatic ring start...................................................93
7.3.6. Exit to the "highway"................................................... ...95
7.3.7. Transition from the "main" to the "ring"............................................96
7.3.8. Normal stop................................................... ..96
7.3.9. Emergency Stop................................................ ...97
7.3.10. Checking emergency protections........................................98
7.3.11. Operation of actuators............................................99
7.4. Warning messages and emergency protection of GPU.......102
7.4.1. Emergency protections causing emergency stop
with gas bleeding from the supercharger circuit..................................102
Unit GPA-Ts-16
The GPA-Ts-16 unit is designed for transporting natural gas through main gas pipelines at an operating pressure of 56-76 kg/sq.m. cm.
At booster compressor stations, the gas compressor operates with an outlet pressure of up to 41 kg/sq.m. cm with a replaceable flow part of the supercharger.
The gas pumping unit is fully automated, installed in an individual container and can be operated at ambient temperatures from -55 to +45 degrees. WITH.
Gas turbine engine NK-16ST
air purifying gas turbine engine unit
The NK16-ST stationary gas turbine engine is based on the NK-8-2U aviation turbofan engine. It is a two-stage three-shaft gas turbine unit. It consists of two modules - a gas generator and a free turbine, which have their own frames. Modules can be replaced during operation.
Supercharger NTs-16
The compressor is a two-stage centrifugal machine designed to compress natural gas. Consists of the following components. The outer casing, which is a forged steel cylinder. Forged steel pipes are welded to the outside of the cylinder - suction and discharge. The support legs of the supercharger are welded to the lower part, and the support legs for two hydraulic accumulators are welded to the upper part. The body is closed at both ends with forged steel covers, which are secured with split retaining rings and brackets. An inner housing is located inside the outer housing. The internal casing consists of a suction chamber, diaphragm, diffusers, inlet and return guide vanes. At the bottom of the inner body there are rollers, from which the inner body rolls into the outer one.
Air cleaning devices / VOU-110-4Ts for the GPA-Ts-16 unit
Benefits and Features
The use of a combined filtration system (CSF) based on EMW filtertechnik VKKW RU-400-4-MG-1-PF-MPK-48/22 filters (manufactured by EMW, Germany) ensures air purification to degree F9 (maximum dust particle size after filters - no more than 5 microns);
the design of the filter itself allows it to be easily replaced in case of clogging;
thanks to the use of EMW filters, HEU has significantly lower resistance compared to analogues;
polycarbonate is used as the covering of the canopy, which is attached to the frame using aluminum profiles and self-tapping screws, and has a number of advantages compared to other materials: low cost, lighter weight, lack of corrosion, and the possibility of installation without welding;
the bypass valve installed on top of the filter block is automatically activated at a pressure drop of 70 mm. water st at the suction and returns to its original position at a pressure drop of 52 mm. water Art. Heating the valve allows it to operate at any temperature range;
the design of filter blocks in the form of prisms makes it possible to reduce the area and weight of the HEU;
The design of the HEU visor ensures an air suction speed of up to 0.8 m/s, which eliminates the ingress of atmospheric precipitation under the visor.
Specifications
Parameter name Manufacturer LLC NPP "35th Mechanical Plant" Air purification type Combined filtration system (EMW) Number of cleaning stages 3 steps Number of cyclones, pcs. Number of filters, pcs. Nominal air flow, kg/s Hydraulic resistance of HEU, mm. water st Efficiency of air purification from particles larger than 5 microns., % Weight, kg Dimensions, mm 10450x6900x5780 The NK-16ST gas turbine engine for the gas production industry is based on the NK-8-2U aircraft engine, which ensures its high reliability and efficiency. Used in gas pumping units GPA-Ts-16. Serial production and delivery of the NK-16ST engine to gas pipelines has been carried out since 1982. 1141 engines were produced. The total operating time of the engine fleet is more than 40 million hours. Due to its high reliability, this drive has found application in the energy sector. Currently, at more than 30 power plants, NK-16ST engines are used as drives for power plants operating on associated petroleum gas. Specifications
Power, not less: Effective efficiency, no less: Range of rotation speed of the free turbine drive shaft: 3975-5350 rpm Nitrogen oxides: Carbon oxides: Maximum sound pressure level: Engine weight with frame: Fuel gas consumption: Engine starting: auto Gas temperature at the outlet of the free turbine: Warranty resource: Overhaul life: 25,000 hours Assigned resource: 100,000 hours Oil used: Gas turbine engine electric starting system
Electric starter STE-18ST One of the latest developments of Everest-turboservice CJSC and Elektroprivod OJSC (Kirov) is the creation of an STE-18ST electric starter for starting the NK-16ST gas turbine engine and its modifications with a capacity of 16-20 MW, used by Gazprom OJSC for more than 600 gas pumping units. Advantage new development consists of replacing turbo-expander engine starting using compressed natural gas (in this case, a total of up to 3 million m3 of natural gas per year is emitted into the atmosphere) with environmentally friendly electric starting. This will simplify the launch system, reduce natural gas consumption, and improve environmental and technological safety. This development meets all requirements for environmental friendliness of the equipment in use. The electric starter is installed in place of the pneumatic starter and does not require modification of the connection point with the drive box of the engine components, which allows the installation of an electric start system with an STE-18ST electric starter under operating conditions. The rated power of the STE-18ST electric starter is 65 kW, the rated torque developed by the electric starter is 245 N/m (25 kgf/m), its operating mode is intermittent. The electric starter is controlled by the BUS-18ST control unit, which converts three-phase alternating current voltage 380V, 50Hz into three-phase alternating current voltage from 0 to 380V and frequency from 0 to 400Hz. The control unit determines the readiness of the electric starter for operation, sets its operating modes, the torque of the electric starter, issues a signal to shut down, and also allows for diagnostics and adjustment of the electric starter parameters. The electric starter STE-18ST is certified and has explosion protection marking 1ExdIIВТ3. Its use is permitted in hazardous areas. In November 2006, the STE-18ST electric starter as part of the NK-16ST engine electric start system passed successful bench tests at the stand of the Zelenodolsk Machine-Building Plant. Electric starter tests were carried out in accordance with the NK-16ST engine starting algorithm in force at Gazprom compressor stations, that is, a series of three cold cranks and engine starting was repeated several times. The maximum temperature value of the electric starter stator windings was 76°C. In accordance with the “Acceptance testing program for the electric starting system of the NK-16ST engine in the gas pumping unit GPA-Ts-16 at the Vyaznikovskaya CS”, Volgotransgaz LLC, in April-May 2007, the air starter on the NK-16ST engine was replaced with an STE-electric starter 18ST with control unit BUS-18ST. After debugging the installed equipment, the GPA-Ts-16 unit was switched to the “Highway” mode. In June 2007, the NK-16ST electric engine start system without any comments passed preliminary tests in the scope of the “Acceptance test program for the NK-16ST electric engine start system in the gas pumping unit GPA-Ts-16 at the Vyaznikovskaya CS of Volgotransgaz LLC.” The STE-18ST electric starter fully ensured the implementation of the cyclogram of cold cranking, hot starting and flushing of the gas-air path of the NK-16ST engine. In August 2007, in order to assess the efficiency and operability of the electric starting system for NK-16ST (NK-16-18ST) engines with an STE-18ST electric starter and make a decision on the further implementation of this system, a special commission conducted acceptance tests at the facility of OJSC Gazprom - KS "Vyaznikovskaya" Volgotransgaz LLC. Based on the positive results of the acceptance tests, the Acceptance Committee of OJSC Gazprom decided to modify the remaining NK-16ST engines at the Vyaznikovskaya CS with electric start systems and recommended the use of this electric start system at other facilities of OJSC Gazprom. On the NK-16ST (NK16-18ST) engines in June 2009 at the Vyaznikovskaya CS, specialists from Everest-Turboservice JSC and Elektroprivod JSC completed modifications to the starting system by replacing the pneumatic starter with an STE-18ST electric starter. The decision to transfer all engines of the Vyaznikovskaya CS to an electric start system was made after 2.5 years of leading operation of the system with an STE-18ST electric starter on one of the engines of this station. During this time, the electric starter performed about 500 starts and had no defects. In the process of equipping the engines with an electric start system, the electrical part of the GPA-Ts-16 gas pumping unit was modified to connect the electric starter to the main input of the existing input distribution device located in the GPA automation compartment. On each engine, after installing the electric starting system and modifying the GPU electrics, cold cranking, hot starting and flushing of the gas-air path were performed, after which the unit was handed over to the operators according to the certificate. In addition, testing of the 25 MW NK-361 engine equipped with an STE-18ST electric starter and installed on the GT-1 mainline gas turbine locomotive continues. The technical potential of the STE-18ST electric starter, demonstrated during testing, allows its use in electric starting systems for gas turbine engines of other sizes and power. Starter control unit BUS-18ST Specifications: · Power supply and control of the electric starter are carried out from the BUS-18ST starter control unit. · The BUS is powered from a three-phase alternating current network: · Supply voltage 380V Voltage frequency 50Hz · Rated power of electric starter 60…65 kW · Rated torque developed by electric starter 245N m (25 kgf m) · The maximum torque developed by the electric starter is not less than 539 N m (55 kgf m) Current consumed by the electric starter · at rated torque, no more than 120A Electric starter output shaft frequency: o in cold cranking mode 1380 rpm o in hot start mode 2600 rpm · Control signal voltage 27V · Intermittent operating mode Electric starter weight, no more than 57 kg · 230x440ÆDimensions of electric starter · BUS dimensions 1500x1000x400 mm · BUS weight 250 kg Supercharger NTs-16
The supercharger housing makes it possible to install the flow part for the entire range of engine powers and obtain high polytropic efficiency at final pressures of 56, 76 and 85 kgf/cm2 and pressure ratios of 1.36; 1.44 and 1.5. Modern superchargers with electromagnetic rotor suspension and gas-dynamic seals are produced for gas pumping units. Superchargers are designed for pumping natural gas through main gas pipelines. The basic blower housings are designed for the installation of replaceable flow parts, for final pressures of 56, 76 and 85 kgf/cm2 and pressure ratios of 1.36, 1.44 and 1.5. Superchargers are also supplied as part of pressure installations, including a supercharger unit with support systems. Supercharger housing assembly The centrifugal injection unit UNTS-16-76/1.44 was used in the GPA-16 "Volga", the NTs-12 56/1.44 supercharger was used in the GPA-12 "Ural" and the NTs-8-56/1.44 supercharger was used at ASPU - 8 "Volga". The NTs-16-76/1.44 supercharger is designed to a high standard technical level using magnetic suspension of the rotor and “dry” gas-dynamic seals. The use of spatial impeller blades and a bladeless diffuser ensured a polytropic efficiency at the operating point of 85% and a wide range of effective operation of the supercharger. Structurally, the superchargers are made on the basis of licenses from Dresser (USA). Carbide ring with spiral grooves dry seal It is possible to install any of two end seals into the supercharger: oil end seals and “dry” gas-dynamic seals. Bearings are used both hydrodynamic oil and “dry” electromagnetic. Technical characteristics of superchargers and pressure units with gas turbine drive
Application area Purpose Productivity m 3 /min Pressure, MPa (kgf/cm2) (abs). Gas turbine engine Installation dimensions, mm Installation weight, kg Initial Final power, kWt Rotor speed, rpm AGPU-8 "Volga" Pumping natural gas through the main gas pipeline 2340x 1320x 1380 GPU-12 "Ural" 2620x 2670x 1700 2900x 2500x 1760 UNC16-76/ 1.44 GPA-16 "Volga" 14550x 12000x 5300 Literature
1. http://compressormash.ru http://www.new.turbinist.ru
Gas turbine engine NK-16ST
GC TREM Engineering
TREM-MODECOM
Russian developers of dry gas-dynamic seals
SHORT DESCRIPTION
GAS DYNAMIC SEAL SYSTEMS
SUPERCHARGER GPA-Ts16
We present to your attention short description gas dynamic seal systems (SGDS) for superchargers of gas pumping units (GPA) with a capacity of 16 MW.
The use of SGDU reduces the losses of the pumped gas by several orders of magnitude, eliminates the use of oil for seals and the ingress of oil into the flow part of the supercharger. SGDU can be installed in new superchargers and in NTs-16 superchargers operating as part of GPA-Ts16 produced by Sumy NPO named after. Frunze.
Due to the fact that GPA-Ts16 superchargers have several design options for the covers, TREM-Modecom CJSC, before starting work, measures the locations for installing sealing cartridges on a specific unit.
There are two options for completing the system:
Using imported control and control equipment and partially imported fittings.
Using domestic fittings and control equipment.
1. MAIN CHARACTERISTICS AND PARAMETERS
The gas-dynamic seal system consists of two sealing cartridges installed in the supercharger, a control stand and pipelines connecting the supercharger to the stand.
1.1 The main characteristics and parameters of the SGDU are given in Table 1.
Table 1
|
Name |
Unit |
Meaning |
|
1. Pressure of the sealed gas (g) 2. Nominal speed of the supercharger rotor, change limits 3. Gas supplied to the working stage of the cartridge - gas taken from the discharge manifold (behind valve No. 2) 3.1 Pressure at the inlet to the control rack (g) 3.2 Temperature at the entrance to the rack, no more 3.3 Consumption (for two cartridges), no more 3.4 Pressure before the working stage 3.5 The size of particles of mechanical impurities in the gas at the inlet to the cartridge is no more than 3.6 Nominal gas leakage through the first stage of the cartridge, no more 4. Separating (barrier) gas – air 4.1 Rack inlet pressure (g) 4.2 Temperature at the entrance to the rack, no more 4.3 Consumption (for two cartridges), no more 4.4 Pressure at the cartridge inlet (g) 5. Maximum double amplitude of rotor radial vibration allowed for the chuck 6. Maximum permissible axial displacement of the rotor part of the cartridge relative to the stator |
kgf/cm 2 o C |
500.0 at 0.5-1.0 kgf/cm 2 above pressure compacted |
1.2 Parameters for which preventive measures are provided
(pre-emergency) alarm:
Gas leakage through the working stage of each cartridge is above or below normal;
The difference between the pressure of the gas supplied to the working stage and the pressure of the sealed gas is below normal;
The pressure difference across the gas and air filters is higher than normal: - the concentration of methane in the separation air is higher than normal; - separation air pressure is below normal.
1.3 Parameters for which emergency protection is provided:
The gas leakage pressure through the working stage of each cartridge is emergency;
The concentration of methane in the separation air is emergency;
Emergency separation air pressure;
The values of the warning alarm and emergency protection settings are specified at the stage of developing the technical specifications.
2. DESIGN FEATURES
2.1 The peculiarity of these gas-dynamic seals is that they contain two sequential sealing stages. The first stage along the gas flow is working, the second is safety. The main elements of the sealing stage are a rotating carbide disk and a stationary graphite ring.
JSC "TREM-Modecom" has mastered the production of non-reversible
The description is given in accordance with diagrams Appendix B19, B20, B23, B24.
The GPA-Ts-16 unit is an automated installation with a gas turbine single-circuit twin-shaft drive with an independent free turbine (NK-16ST) with a rated power of 16 MW, with a centrifugal supercharger NTs-16 manufactured by JSC Sumy NPO named after. M.V. Frunze"
The NTs-16 centrifugal supercharger consists of a housing and a replaceable flow part. The supercharger lubrication system is circulating oil under pressure with air cooling, the supercharger sealing system is hydraulic oil, slotted with floating rings.
At the 2nd stage of compression of the BCS, replaceable flow parts SPC-16/76-2.0M1 manufactured by OJSC Kazankompressormash, Kazan, with a nominal pressure ratio of 2.0 are installed.
At the 1st stage of BCS compression at GPU No. 6, a replaceable flow part SPC-16/56-1.7 manufactured by OJSC Kazankompressormash, Kazan, with a nominal pressure ratio of 1.7 was installed.
In 2012, after reconstruction, compressors 294ГЦ2-460/18.5-41 manufactured by OJSC Sumy NPO im. M.V. Frunze" with a nominal pressure ratio of 2.2.
The technical characteristics of the unit are presented in table 11.2.
The gas pumping unit GPA-Ts-16 consists of separate functionally completed blocks and assembly units of full factory readiness, joined together at the site of operation.
The GPU includes: a turbo unit (engine compartment, supercharger compartment), a support systems unit (automation compartment, oil unit compartment, fire extinguishing compartment), an air-cleaning device (ACU), suction path silencers, a suction chamber, an intermediate unit, an oil cooler unit, an exhaust diffuser, exhaust shaft, exhaust tract silencers.
The technological piping of GPA-Ts-16 with installed shut-off and control valves ensures gas supply from the inlet manifold to the supercharger inlet, from the supercharger after compression to the starting circuit or to the output manifold (depending on the operating mode), supply of starting and fuel gas to the gas turbine drive NK-16ST, supercharger surge protection, gas discharge from process pipelines when the gas compressor unit is stopped.
To provide gas pumping units with fuel and starting gases, a separate block-box of gas filters (BFG) is provided. The block box is equipped with fuel and starting gas filters and shut-off valves.
The composition and purpose of the shut-off and control valves of the GPU process piping are given in Table 3.5.
Modes of starting, stopping GPU, working on the ring and in the main, emergency protection, speed control and anti-surge control, remote control shut-off and control valves and actuators are implemented in automatic mode, an automatic control system for the MSKU 4510 gas pumping unit, located in a separate block-box.
The list of GPU blocking and alarms is given in Table 5.4.
Values controlled parameters and control functions are transferred to automated workplace(Workstation) of the operator installed in the control room of the BCS control unit.
Operation of gas pumping units must be carried out in accordance with 1.4300.4.0000.000 IE “Operating instructions for the gas pumping unit GPA-Ts-16” and “Manual for technical operation engine NK-16ST". The sequence of work during startup, shutdown and repair of the GPU is presented in Appendix A13.
Table 3.5 - Purpose and a brief description of shut-off and control valves for GPU process piping
| №№ | Equipment name | Position number according to the scheme, index | DN, mm | type of drive | Purpose | Control | Note |
| Ball valve | Pneumohydro drive | Inlet shut-off valve. Blocks the inlet manifold of the central bank of the gas compressor | Open when the unit is operating | ||||
| Ball valve | Pneumatic drive | Installed on the bypass line of valve No. 1. Serves for purging and filling the GPU supercharger circuit before start-up | Automatically controlled by self-propelled control system, has additional manual (local) control | Closed when the unit is operating | |||
| Ball valve | 4p | Manual | Duplicate tap. Installed on the bypass line of valve No. 1 in series with valve No. 4 | Local government | Open when the unit is operating | ||
| Ball valve | Pneumohydro drive | Discharge shut-off valve. Closes the output manifold of the central bank of the gas compressor | Automatically controlled by self-propelled control system, has additional manual (local) control | When the unit is operating in the “Highway” mode, it is open | |||
| Check valve (gate) | OK2 | - | Serves to prevent reverse gas flow towards the central bank from the outlet manifold | - | - | ||
| Ball valve | Pneumatic drive | Candle tap. Designed for purging the central heating unit of the gas compressor during startup and bleeding gas from the supercharger circuit when stopping | Automatically controlled ACS GPU has additional manual (local) control | Closed when the unit is operating. | |||
| Ball valve | Pneumohydro drive | Participates in an emergency stop | Serves for GPU operation on a small aggregate ring during start-up, normal stop, and unit operation in the “Ring” mode. When the GPU transitions from the “Ring” mode to the “Mainline” mode, it remains in the open position | Open when the unit is operating | |||
| Check valve (gate) | It is automatically controlled by the self-propelled control system of the gas pumping unit during startup, normal and emergency shutdown of the unit, and also has additional manual (local) control | - | OK6 | - | - | ||
| Serves to prevent reverse gas flow towards the central bank from the outlet manifold of the small station ring | Regulator valve (GPA 6-10) | Pneumohydro drive | 6r | ||||
| Installed on valve line No. 6. Designed to prevent the operation of the gas compressor in the surge zone and protect against surge of the supercharger by bypassing gas from the outlet manifold to the input of the 1st stage gas compressor along a small station ring | Regulator valve (GPA 6-10) | Pneumohydro drive | Regulator valve (GPU 1-5) | Installed on valve line No. 6. Designed to prevent the operation of the gas compressor in the surge zone and protect against surge of the supercharger by bypassing gas from the outlet manifold to the input of the 2nd stage gas compressor along a small station ring | The unit is usually closed when operating. Opens automatically to protect against supercharger surge | ||
| Ball valve (valve) | 5-1 | Manual | Serves to relieve the residual pressure of the pipeline section between check valve No. OK6 and valve No. 6 in order to prevent gas breakthrough) | Local government | Closed when the unit is operating | ||
| Ball valve (valve) | 5-2 | Manual | Serves to relieve the residual pressure of the pipeline section between check valve No. OK2 and valve No. 2 in order to prevent gas breakthrough) | Local government | Closed when the unit is operating | ||
| Ball valve (BFG) | Pneumatic drive | Candle tap. Serves for purging the pipeline and fuel gas filters when starting the gas compressor and bleeding gas from the pipeline and filters after stopping the gas compressor | Automatically controlled by self-propelled control system, has additional manual (local) control | Closed when the unit is operating | |||
| Ball valve (BFG) | Pneumatic drive | Candle tap. Serves for purging the pipeline and the starting gas filter when starting the gas compressor and bleeding gas from the pipeline and filters after stopping the gas compressor | Automatically controlled by self-propelled control system, has additional manual (local) control | Closed when the unit is operating | |||
| Ball valve (BFG) | Pneumatic drive | Shut-off valve. Installed on the pipeline for supplying starting gas to the NK-16ST engine to spin up the aircraft (air starter) at the start-up of the gas compressor. Serves to supply and shut off the supply of starting gas | Automatically controlled by self-propelled control system, has additional manual (local) control | Closed when the unit is operating | |||
|
Gas pumping units (GPUs) are intended for use at linear compressor stations of main gas pipelines, booster compressor stations and underground gas storage stations, as well as for reinjecting gas into the reservoir during the development of gas condensate fields. The automatic control system for some gas pumping units (ACU-A), made using advances in microprocessor technology, ensures that the units operate in automatic mode, which eliminates the constant presence of maintenance personnel near the unit. The work of maintenance personnel during operation of the units consists of carrying out routine maintenance on its maintenance, periodic monitoring of parameters and condition. The design of the units allows inspection and replacement of some elements without stopping it. When developing units, we use modern systems data processing and computer-aided design. High quality The manufacture of gas pumping units is ensured by the use of progressive technological processes. During the production process, units are subjected to comprehensive tests, which ensures performance characteristics units, as well as the reliability and safety of their operation. The gas turbine gas pumping unit includes a gas turbine unit, a centrifugal natural gas supercharger, an exhaust device, fuel and starting systems, oil systems, automatic control, regulation and protection, oil cooling, and a hydraulic seal of the supercharger. Of the large number of possible schemes for gas turbine installations on gas pipelines, the most widespread are simple cycle installations made without regeneration or with heat recovery exhaust gases, with independent power turbine low pressure(“with a split shaft”) to drive a gas blower. Most of the standard sizes of gas turbine engines for driving superchargers are made according to the same design scheme - with a “split shaft” and a low-pressure power turbine, therefore their characteristics can be summarized with sufficient accuracy in the given relative form, i.e. in the form of dependencies of the given parameters related to nominal values. GPU equipment is made in the form of block structures that provide transportation by rail, water or special by car(the mass of blocks usually does not exceed 60-70 tons). The units must be manufactured ready for installation and commissioning without disassembly or revision. External piping and electrical services connecting units should be kept to a minimum and have simple connections. The GPU automatic control system must provide: Automatic start, normal and emergency stop of the unit, regulation and control of technological parameters of the gas turbine unit and supercharger - Warning and emergency alarms, GPU protection in all operating modes, Communication of the unit with the workshop automatic regulation and control system, Possibility of remote change of GPU mode from shop and station control systems. The gas compressor must ensure operation at a gas pressure at the outlet of the supercharger equal to 115% of the nominal (for testing the gas pipeline), with a total duration of this mode of no more than 200 hours/year. The start-up of the gas compressor is carried out, as a rule, with preliminary filling of the supercharger circuit with process gas of operating pressure. An integrated air purification device for the gas turbine inlet tract must ensure the condition of the cyclic air at the compressor inlet and noise protection under various operating conditions. Anti-icing devices may include an icing alarm, systems for heating the elements of the inlet path and the compressor with hot air, the entire mass of cycle air by mixing combustion products taken after the turbine, mixing air from the compressor (regenerator) or mixing a hot mixture of air and combustion products. The design of the gas compressor must ensure a number of requirements that comply with current standards and norms of explosion safety, explosion prevention and explosion protection, fire safety, to vibration, noise indicators and heat emissions in workplaces and in the environment, to temperature, humidity and air mobility of the working area in buildings for gas compressor units Height chimney The gas turbine unit is selected based on the dispersion of toxic substances contained in the exhaust gases to the maximum permissible concentrations in the ground layer in accordance with sanitary standards. The GPA-Ts-16 gas pumping unit based on the NK-16ST aircraft drive in a block-container design is designed for pumping natural gas through main gas pipelines and is designed for a supercharger operating pressure of 7.5 and 9.9 MPa (respectively, modifications GPA-Ts-16/76 and GPA-Ts-16/100). Operating pressure at the outlet of the supercharger is determined only by the design of the embedded elements of the flow part of the supercharger (impellers, diffusers, rings), for which replacement is provided in the design of the unit: thus, the GPA-Ts-16 unit is completely unified and represents a structure consisting of finally assembled functional units and systems supplied to compressor stations in full factory readiness. The design of the block-packaged automated unit GPA-Ts-16 provides for stable operation of the unit at the compressor station during temperature changes environment from 218K (-55°C) to 318K (+45°C) (climatic version “XL”, placement category 1 according to GOST 15150-69). Structurally, the unit is an installation, all of the equipment of which is placed in separate transportable blocks, shown in Figure 2. At the site of operation, the unit is installed on a monolithic reinforced concrete foundation. Figure 2 - Gas pumping unit GPA-Ts-16 a - side view; b - top view; 1 - suction chamber; 2 - silencer at the entrance; 3 - air purifying device; 4 - unit oil units; 5 - oil cooler block; 6 - pipeline of the cyclic air heating system; 7 - output silencer; 8 - spacer; 9 - exhaust shaft support; 10 - diffuser; 11 - turbo block; 12 - automation unit: 13 - ventilation unit 14 - intermediate unit; 15 - drainage collector; 16 - heating system manifold; 17 - fuel gas filter block.  Figure 3 - Scheme of GPA-Ts-16 The unit includes blocks of a turbine unit, oil units, automation, instrumentation and ventilation devices, as well as cyclic air supply devices with an air-cleaning device (ACU), noise-attenuation and anti-icing systems, and an exhaust device with noise-attenuation. Turbo block 11 is the basic assembly unit of the unit; in its container on a metal frame there is a supercharger, a drive motor, an oil tank of the unit with a pipeline system, a hydraulic accumulator, an exhaust volute, and various systems to ensure the normal operation of the unit. The pumped gas through the gas pipeline through the inlet pipe “A” enters the centrifugal blower, where it is compressed and supplied through the outlet pipe “B” into the main gas pipeline. The supercharger is driven by an aviation-type gas turbine engine NK-16ST, which uses purified and reduced gas to start and power it (GOST 21199-75). To purify fuel gas from mechanical impurities, the unit has a fuel gas filter unit 17. The mechanical connection between the free engine turbine and the supercharger rotor is carried out through an intermediate shaft (clutch). The engine compartment and the turboblock supercharger compartment are separated by a sealed partition. The supply of cyclic air to the drive engine is carried out through input devices, including an air cleaning device 3, noise suppressors 2, a suction chamber 1, an intermediate block with a confuser air intake 14. The air intake ensures the uniformity of the air flow entering the engine. To remove exhaust gases leaving the free engine turbine. and their noise is reduced by an exhaust device consisting of an exhaust volute, a diffuser 10, a spacer 8 and silencers 7. The diffuser and silencers are installed above the turbo unit on a separate support 9. In order to ensure ease of maintenance of the unit, the main components of the oil system are located in a separate block of oil units 4, and the instruments and panels of the automatic control system of the unit are located in the automation block 12. The engine compartment is ventilated by extracting air from the suction tract with a centrifugal fan installed in ventilation unit 13. The ventilation system prevents dust from entering the engine compartment. The ventilation unit also provides oil cooling in the event of an emergency shutdown of the external power supply to the fans by taking part of the air from the engine compressor and passing it through the oil coolers Oil cooling in the engine and supercharger oil systems is carried out by devices air cooling installed in two oil cooler blocks 5. The ventilation unit and oil cooler units are located respectively on the intermediate, oil units and automation units. This arrangement of blocks made it possible to minimize the area occupied by the unit at the gas pumping station. The joining of all blocks is carried out through flexible adapters, which make it possible to compensate for installation inaccuracies during installation of the unit. To ensure protection of the engine air intake device from icing, the unit is equipped with a cyclic air heating system 6. The system is activated automatically using ambient temperature sensors and operates on the principle of selecting a portion of hot exhaust gases using ejectors and supplying them to the engine inlet. Ejecting air is supplied from a low pressure compressor. The heating system for blocks and compartments of the unit allows for commissioning and renovation work in the cold season, it also ensures the selection of hot air from the operating unit for the needs of the station. Air for the heating system is taken from the compressor high pressure engine in quantity; The heating system is connected to the station system through a common manifold 16 for the entire unit. The automated fire extinguishing system and the automated control system of the unit ensure its operation in all modes without the constant presence of maintenance personnel near the unit, as well as functioning as part of an integrated system. Enter keywords. THE BELLThere are those who read this news before you. 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