Power plant for compressor station of gas pipeline

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

 

The combination of steam power installation and turboexpander compressor stations of main gas pipeline. The invention can be used for compressor station natural gas transportation system.

Famous classical scheme of binary combined cycle to recover heat from exhaust gases of gas pumping units at compressor stations of main gas pipeline [p.5-13, "Disposal and utilization of secondary energy resources of compressor stations". Shelkovskiy B. I., Paticence A.S. Zakharov V.P. Publishing house "Nedra", 1991]. Scheme binary combined cycle consists of two main parts, the first compressor unit, the second steam power plant, which utilizes thermal energy of the exhaust gases of gas-pumping unit. In a steam power installation thermal energy of the exhaust gases of gas-pumping unit disposed in the steam recovery boiler generated steam is fed to the steam turbine, where the useful work of the rotation shaft, made by steam enters the condenser, where the steam condenses, the water condensate is pumped to the water treatment plant, feed pumps water enters the steam boiler, and so on. The shaft of a steam turbine steam installation connect or supercharger for perekati the project for a gas, or with a generator for generating electric energy. In the first embodiment utilized the energy of the exhaust gases of gas pumping units used for pumping of the main gas. In the second embodiment utilized the energy of the exhaust gases of gas pumping units used to generate electricity.

A disadvantage of the classical use of thermal energy of the gas compressor unit in a steam power installation at the compressor station is that the input energy is used in the same way, or for pumping of the main gas, or for the generation of electric energy. Thus not widely used in the gas industry. Hence, the failure of a large number of thermal resources exhaust gas pumping units.

The technical problem of the invention is to extend the possibility of using thermal energy of exhaust gas compressor units compressor station. To ensure energy use exhaust gases to compress the main gas and generate electric energy for consumers compressor station.

The invention consists in the fact that steam power plant with a supercharger on the shaft of a steam turbine, is included in the network of main gas pipelines of dopolnjaetsja the expander, included in such a way that the outlet and inlet of the compressor is connected with the input and output of the turboexpander, respectively. Thus, part of the flow of gas pumped by the compressor steam power installation, measured by the generation of electric energy is sent to the expander, which produces electric energy, the remaining portion of the gas stream enters the gas-main pipeline.

Scheme combination steam install and expander shown in the drawing.

Scheme combination steam install and expander contains a steam power installation 1, which includes a steam boiler 2, a steam turbine 3, a compressor 4, a condenser 5, the condensate pump 6, the water treatment plant 7, pump 8, closed into a loop. The gas blower 4 and the turbo-expander 11 generator 12 is included in the inlet 9 and outlet 10 network trunk gas pipeline. In the input power to the compressor and the expander is activated via an adjustable valve 13.

Scheme combination steam install and expander works in the following way. Recyclable thermal energy of the exhaust gases of gas-pumping unit is converted to steam power installation into mechanical energy of rotation of the shaft of a steam turbine. The energy of rotation in the compressor is converted into potentially the th energy of compressed gas. The main part of the energy of compressed gas is directed from the gas stream for delivery to the network of the main pipeline. The other part is determined by the volume of power generation, goes with the flow of gas in the expander, where the potential energy of compressed gas is converted into mechanical energy of rotation of the shaft of the expander. The rotational energy in the generator is converted into electrical energy. Thus, recycling thermal energy of the gas compressor unit is converted into energy pumping gas and electricity to private consumers compressor station. Thus reduce consumption of fuel gas by 35%for gas pumping units produced electricity own source, increases the reliability of electricity supply to consumers of the compressor station.

To ensure operation of the turboexpander in the working area, input from the main pipeline to the connection node of the input of the compressor and the output of the turboexpander is adjustable valve, which begins to regulate the pressure drop at the inlet to the blower and the outlet of the expander, in the case when the pressure drop across the expander is less than the required for the expander. Thus the differential pressure is I on the expander increases, to the desired low values of pressure drop across the expander.

This object extends the possibility of using thermal energy of exhaust gas compressor units compressor station. Provides energy use exhaust gas compressor units for compression of the main gas and the generation of electric power to consumers of the compressor station. By combining steam power plant with a gas blower and turbo-expander generator, plugged in the main pipeline so that the outlet and inlet of the compressor steam power installation connected to the inlet and outlet of the expander, respectively. Thus, energy komprimierung gas, which produces steam power installation, is directed into the main pipeline, and part of it is sent to the expander, where generating electrical energy. Thereby achieve energy use exhaust gas compressor units for gas compression and electric power generation.

1. Power installation for compressor stations of main gas containing steam power installation with pump gas on the shaft of a steam turbine, is included in the network of the main pipeline, characterized in that the installation and the spacecraft is equipped with a turbo-expander generator, the input and output of the turboexpander is connected to the output and the input of the supercharger steam power installation, respectively.

2. Energy installation according to claim 1, characterized in that in order to ensure operation of the turboexpander at low pressure drops on the expander before the connection node of the input of the compressor and the output of the turboexpander is adjustable crane.



 

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1 dwg

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1 dwg

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