The method of use of secondary energy resources of main gas pipelines compressor stations

 

(57) Abstract:

The invention relates to energy-saving and ecologically safe technologies of pipeline transport of gas, oil, petroleum products and can be used in the construction of new and modernization of existing pipelines. The method involves the utilization of heat flow of compressed gas at compressor stations of main gas pipeline and use it for additional drive power of the compressor, as well as the use of heat in steam turbine exhaust steam for heating the flow of oil (petroleum), resulting in better utilization of the potential volume of secondary energy resources, reduce the consumption of primary energy resources for pipeline transport of gas, oil, petroleum products and create clean technology heating oil) on the stream. 1 Il.

The invention relates to energy-saving and ecologically safe technologies of pipeline transport of gas, oil, petroleum products and can be used in the construction of new and modernization of existing pipelines.

Tech and energy, in turn, 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 of gas pipelines as to increase the capacity 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 - 6].

The closest technical solution, selected as a prototype, is a method of utilization of secondary energy resources (heat of exhaust gases GTU), implemented by the COP in Grand Chenier (USA, Louisiana) according to the scheme given in Fig. 2 [7]. The main disadvantage of this method lies in the utilization of secondary energy resources available to the COP.

The objective of the invention is the reduction of the consumption of primary energy for pipeline transport of gas, oil, petroleum products and clean technologies heating oil and petroleum products on the stream.

The technical result is achieved due to the utilization of heat is Bina water vapor.

Comparative analysis of the proposed solutions with the prototype shows that the proposed method involves, first, the use of previously unused heat extracted from the stream of compressed gas trunk pipeline, for more driving power of the gas compressor COP and, secondly, the use of heat in steam turbine exhaust steam for heating the flow of oil (petroleum), transported by pipeline, provide more than full utilization and efficient use of the existing pipeline of potential volumes of secondary energy resources, reducing consumption of primary energy for pipeline transport of gas, oil, petroleum products and clean technologies heating oil (oil) on the stream.

The drawing is a simplified flow diagram illustrating the inventive method of use of secondary energy resources of main gas pipelines compressor stations.

The diagram shows the compressor station (CS trunk gas G from the gas pumping unit is assembled in the form of machine the capacitor 4 and the pipeline H), the boiler 5, boiler 6, the circulation pump 7 and 7a, the heat pump TONS (consisting of a heat exchanger-evaporator, compressor with adjustable drive M, the steam generator PG, a throttle device 8 and hadproved 9), the steam-PP, pipeline KP.

Combined-cycle power plant (gas turbine - boiler-steam turbine), which utilized the heat of exhaust gases of the gas turbine plant, implements the method laid down in the prototype, and steam turbine (heat pump - steam turbine), which utilized the heat flow of compressed gas main pipeline and heat exchanger system CBT (condenser - section of the main pipeline) implement the inventive method.

Part of the scheme, explaining the inventive method works as follows.

The primary energy source (teplootdachi) - stream compressed by the compressor 2 gas enters the tube of the heat exchanger-evaporator TI heat pump TONS and forth (refrigerated) in a linear pipeline portion, Simultaneously in the annular space T is refrigerant - liquid, boiling at a low temperature, which is used in technology is preparedata from primary energy source to 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 TEE by the compressor To the heat pump TONS, resulting in the annular space T is constantly maintained low pressure and hence low temperature. Compressed by the compressor To the refrigerant to a high pressure heated to the required temperature forced by ladopoulou 9 annulus steam generator PG, in which there is heat transfer from an intermediate energy source to the heat sink (service water), i.e., the formation of water vapor and cooling the refrigerant, causing the latter is condensed.

From the tube space of the steam generator GHG water vapor with the necessary technological parameters (pressure and temperature) is supplied to the line PP in common steam header, where the input of the steam turbine 3, and from the annulus PG liquid refrigerant enters hadproved 9 and passing the throttle device 8 is returned in the annulus of the heat exchanger-evaporator TI, then the duty cycle of the heat pump VT recurs.

Steam turbine 3 rotates the shaft is operated in the steam turbine 3 water vapor enters the tube space of the condenser 4, through annulus which passes the flow of oil (petroleum), resulting in the transfer of heat: oil (petroleum) is heated, and exhaust water vapor condenses. The condensate with the circulating pump 7 is supplied via the pipeline KP in the deaerator 5, where the pump 7a is taken for reuse in a closed loop.

The inventive method allows to simultaneously improve technical and economic performance of gas pipelines and oil pipelines (pipelines) due to the efficient use of previously unclaimed secondary energy resources of main gas pipelines - heat flow of compressed gas and waste heat steam turbine steam.

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. The way the auto is CLASS="ptx2">

5. Installation for cooling a natural gas compressor stations of main gas pipeline. Patent RF N 2125212, F 25 1/02, 30/02, 1999. Bull. N 2.

6. Grishin, C. G., I. Kamenskikh A. energy Saving suboptimal thermodynamic mode of operation of 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. - C. 24 - 31, 65 - 74, 216 - 228.

The method of use of secondary energy resources of main gas pipelines compressor stations, which consists in recycling, characterized in that use previously unused heat flow of compressed gas through main gas pipelines for more driving power of the gas blowers and heat exhaust steam for heating the flow of oil (petroleum), transported through the main pipeline than provide a more complete utilization of the potential volumes of secondary energy resources, resulting in reducing the consumption of primary energy resources for pipeline transport of gas, oil (nafter the

 

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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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