The method of saving energy of main gas pipelines compressor stations

 

(57) Abstract:

The invention relates to energy-saving and ecologically safe technologies of pipeline transport of gas and can be used in the construction of new and modernization of existing gas pipelines. The technical result of the invention is to reduce consumption of primary energy resources and improving the efficiency of use of secondary energy resources of the main gas pipeline to transport gas. The heat flow of the gas transported away heat pumps at the inputs of compressor stations, then his, and the heat of exhaust gases of gas turbine plants use for more driving power of the gas blowers and transform into electricity, which provide a supply of gas pumping units with electric drive, than reduce the consumption of primary energy resources for pipeline transport of gas and efficient use of secondary energy resources gas pipelines. 1 Il.

The invention relates to energy-saving and ecologically safe technologies of pipeline transport of gas and can be used in the construction of new and modernization act is significantly dependent on the intensity of production, and energy consumption, in turn, is largely determined by the degree of utilization of the potential volume of secondary energy resources.

There are many different ways of rational use of secondary energy resources (SER) of main gas pipelines (MG) for increasing the power output of gas pumping units (GPU), and meet the technological needs of compressor stations (CS). Known, for example, the recycling of exhaust gases of gas turbine units (GTU) [1] and heat flow of compressed gas[2, 3, 4, 5, 6, 7].

The closest technical solution, selected as a prototype, is the way of comprehensive utilization of secondary energy resources COP with gas turbine HPA, implemented using the system [8]. However, this method does not allow for the use of electricity resulting from the disposal veer to the COP for power supply electrically driven HPA.

The objective of the invention is the reduction in consumption of primary energy resources and improving the efficiency of use of secondary energy resources of the main gas pipeline to transport gas.

The technical result is achieved due to the fact that the heat flow to the protractor is the call of the gas turbines is used to produce additional driving power of the gas blowers and transform into electricity, which provide a supply of gas pumping units with electric drive, than reduce the consumption of primary energy resources for pipeline transport of gas and efficient use of secondary energy resources gas pipelines.

Comparative analysis of the proposed solutions with the prototype shows that the proposed method involves, first, the use of heat extracted from the gas stream before compression using a heat pump installed at the entrance of the COP, and the heat of exhaust gases of the gas turbine for additional driving power of the gas compressor of the gas turbine and, secondly, the conversion of heat flow of the transported gas and the exhaust gases of the gas turbine into electricity, which is used for power supply of electric HPA, working in conjunction with STU on the COP of the main pipeline.

The drawing is a flow diagram illustrating the inventive method of saving energy of main gas pipelines compressor stations.

The diagram shows the compressor station (CS trunk gas pipeline, compressor unit, assembled in the form of machine cascade (gas turbine installation 1 - magneta the military system 11, heat pump TONS, consisting of a heat exchanger-evaporator And the compressor 7, a condenser, a throttle device 10 and hadproved 9, the steam-PP, pipeline KP, grid U, the second compressor unit with electric motor 5 and the compressor 6.

Scheme of complex utilization veer to the COP with gas turbine and electric motor driven HPA explaining the inventive method works as follows.

The primary energy source (teplootdachi) - the flow of gas from the main gas G flows into the pipe of the heat exchanger-evaporator And heat pump TONS and forth (refrigerated) - the input of the compressor 2 GTU, and after its compression in the linear part of the pipeline, Simultaneously annulus And served the refrigerant - liquid, boiling at a low temperature, which is used in the process VT as an intermediate energy carrier. In the heat exchanger-evaporator is heat transfer from the primary energy source to the intermediate, i.e., the cooling gas flow and heating of the refrigerant.

In the process of heat transfer, the refrigerant boils and its vapors are exhausted from the compressor 7 of the heat pump T, BL is the temperature. Compressed by the compressor 7 refrigerant pumps on ladopoulou 9 annulus capacitor, in which there is heat transfer from an intermediate energy source to the heat sink (service water), ie, water heating and cooling of the refrigerant, resulting in the latter is condensed.

From the annulus To the liquid refrigerant enters hadproved 9 and passing the throttle device 10, again served in the annulus of the heat exchanger-evaporator And then the duty cycle of the heat pump VT recurs.

From the tube space of the condenser To the hot water with the necessary process parameters (pressure and temperature) is supplied to the condensate line CP in the heat exchanger system 11 by the circulation pump 8, where it is heated to a high temperature and is converted into steam by utilizing the heat of exhaust gases of the gas turbine. From the heat exchanger system 11 according to the line PP vapor is fed to the input of the steam turbine 3.

Steam turbine 3 rotates the shaft of the compressor 2, complementing the power supplied to the other end of the shaft of the compressor from the gas turbine and the shaft of the alternating current generator 4, which produces an alternating elec is CLASS="ptx2">

Exhaust steam turbine 3 water vapor (water) enters the tube space of the condenser, where the circulation pump 8 is fed back through the condenser in heat exchanger system 11 for reuse in a closed loop.

The inventive method allows to reduce the consumption of primary energy resources and dispose of secondary energy gas transmission pipelines using them for the needs of the COP to ensure the work of the HPA with electric drive.

Sources of information:

1. Porshakov bpts gas Turbine installations for transport of gas and drilling - M.: Nedra, 1982. - 182 C.

2. The method of transportation of gas via trunk gas pipeline. Patent RF N 2116558, F 17 D 1/02, 1998. Bull. N 21.

3. Cooling system compressed gas at compressor stations of main gas pipeline. Patent RF N 2116584, F 25 1/00, F 17 D 1/07, F 25 30/00, 1998. Bull. N 21.

4. Way of automatically controlling the mode of operation of the main pipeline. Patent RF N 2116557, F 17 D 1/00, 1998. Bull. N 21.

5. Installation for cooling a natural gas compressor stations of main gas pipeline. Patent RF N 2125212, F 25 1/02, 30/02, raboty of trunk gas pipelines. Izvestiya vuzov. Oil and gas, 1998, No. 4. - S. 80...85.

7. The efficiency of gas at compressor stations / Century A. Dinkov, A. I. Gritsenko, Y. N. Vasiliev, P. M. Mogilevsky - M.: Nedra, 1981. - 296 S.

8. Recycling and use of secondary energy compressor stations/ B. I. Shelkovskiy, A. C. Paticence, V. P. Zakharov - M.: Nedra, 1991. - S. 30...31.

The method of saving energy of main gas pipelines compressor stations, which consists in the use of heat transported gas and heat from exhaust gases of gas turbine plants, characterized in that the heat of the gas stream are selected heat pumps at the inputs of compressor stations, then his, and the heat of exhaust gases is used to produce additional driving power of the gas blowers gas turbine units and transform into electricity, which provide a supply of gas pumping units with electric drive.

 

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FIELD: pipeline transport.

SUBSTANCE: power plant is additionally provided with a turbine expander provided with an electric generator. Power generated by the steam plant is directed to the main gas pipeline, and a part of power is directed to the turbine expander with electric generator to produce electric power.

EFFECT: enhanced reliability and efficiency.

1 cl, 1 dwg

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