Process and device for generating power by pressure energy of small natural gas pipeline network

A technology of natural gas pipeline network and pressure energy, which is applied in the direction of engine sealing devices, safety devices, pipeline systems, etc., can solve the problems of insufficient economy and no involvement of small natural gas pipeline networks, etc., achieve simple and easy operation of the process, and expand the pressure energy Utilization field, effect of low energy consumption

Inactive Publication Date: 2013-12-04
SOUTH CHINA UNIV OF TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] None of the above-mentioned existing ones involve small-scale natural gas pipeline network power generation. At present, closed and low-power users such as pipeline network voltage regulating stations and metering stations have to build high-cost power grids due to their special geographical location and small electricity demand. Not economical enough

Method used

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  • Process and device for generating power by pressure energy of small natural gas pipeline network
  • Process and device for generating power by pressure energy of small natural gas pipeline network
  • Process and device for generating power by pressure energy of small natural gas pipeline network

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Experimental program
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Embodiment

[0042] Reference for the device composition of the embodiment figure 1 ; The structure diagram of the expander is as figure 2 , 3 Shown.

[0043] (1) The 1.6-4MPa natural gas that meets the instantaneous demand of the urban pipeline network passes through the first electronic control valve 1, the flow regulating valve 2, and then enters the expander 3 to expand and reduce pressure. After the temperature is restored by the pressure and temperature balancer 7, the pneumatic regulating valve 8. Adjust the second electric control valve 9 to 0.2-1.6MPa, and then enter the downstream medium and low pressure gas pipeline network;

[0044] (2) The high-pressure natural gas is expanded by the expander 3 to convert the pressure energy into mechanical energy, and then the rotor speed is matched with the frequency of the generator 5 through the gearbox 4 to generate electricity, which is used to supply small users such as voltage regulating stations or metering stations that cannot be installe...

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Abstract

The invention discloses a process and a device for generating power by pressure energy of a small natural gas pipeline network. A high-pressure pipeline network of the device is connected with a gas inlet of an expansion machine through a pipeline; a gas outlet of the expansion machine is connected with a gas inlet of a temperature balancer through a pipeline; an outlet of the temperature balancer is connected with a low and medium-pressure gas pipeline network through a pipeline; a main shaft of the expansion machine is connected with a gearbox; the gearbox is connected with a power generator; the power generator is connected with a transformer synchronizer; the expansion machine adopts an improved AT15-65 type gas expansion machine; one end of the main shaft is connected with an air cylinder in a totally-closed way; a first seal ring and a second seal ring, which have sealing effects, are arranged between the other end of the main shaft and a wheel drum; a flow guide pipe is arranged in a closed cavity between the two seal rings; the flow guide pipe is connected with an inert gas bottle. The device can be used for continuously and stably providing a 220 V / 380 V stable power supply for an interruptible and closed 1-5 kW low-power user.

Description

Technical field [0001] The invention relates to the technical field of pressure energy expansion power generation, in particular to a small natural gas pipeline network pressure power generation process and device. Background technique [0002] Pipelines are the main mode of natural gas transportation. Strengthening the construction of gas transmission trunk lines is the foundation for accelerating the development of the natural gas industry. It can not only promote the development of downstream markets, but also stimulate the exploration and exploitation of upstream natural gas resources, thereby driving the development of the entire natural gas industry chain. With the construction of natural gas pipeline network, how to improve the economy and safety of pipeline network transportation has become an issue of increasing concern. High-pressure natural gas will produce a large pressure drop during the pressure adjustment process, releasing a large amount of energy, but the utiliza...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01C13/00F01C20/24F01C19/00F17D3/01
Inventor 徐文东段娇刘宗斌潘季荣
Owner SOUTH CHINA UNIV OF TECH
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