CN102900640A - Device for generating power by using pressure difference energy of natural gas delivery pipeline - Google Patents

Device for generating power by using pressure difference energy of natural gas delivery pipeline Download PDF

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Publication number
CN102900640A
CN102900640A CN201210403284XA CN201210403284A CN102900640A CN 102900640 A CN102900640 A CN 102900640A CN 201210403284X A CN201210403284X A CN 201210403284XA CN 201210403284 A CN201210403284 A CN 201210403284A CN 102900640 A CN102900640 A CN 102900640A
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CN
China
Prior art keywords
pressure
energy
pipeline
gas
natural gas
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Application number
CN201210403284XA
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Chinese (zh)
Inventor
李炎
井鸿勇
肖峰
黄浩
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成都昊特新能源技术有限公司
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Application filed by 成都昊特新能源技术有限公司 filed Critical 成都昊特新能源技术有限公司
Priority to CN201210403284XA priority Critical patent/CN102900640A/en
Publication of CN102900640A publication Critical patent/CN102900640A/en

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Abstract

The invention discloses a device for generating power by using pressure difference energy during pressure-adjustable delivery of natural gas and particularly relates to a device for generating power by using pressure difference energy of a natural gas delivery pipeline. The device is arranged at a part where the pressure difference exists between an upstream pipeline and a downstream pipeline in the natural gas delivery pipeline, wherein the atmospheric pressure in the upstream pipeline is greater than that of the downstream pipeline; a filtering separator is connected between the upstream pipeline and the downstream pipeline; a heating device and an expansion generator are arranged between the filtering separator and the downstream pipeline; the heating device is an electric heating device or waste heat exchange device; and a gas-liquid separating device is arranged at the rear part of the expansion generator. According to the device disclosed by the invention, the pressure adjusting function is realized by adopting the expansion generator instead of a pressure adjusting valve; the work doing to the outside can be realized while the pressure is adjusted; the pressure difference energy is converted into electric energy or cold energy for outputting and liquid light-hydrocarbon can be obtained and the full utilization of resources is realized; and natural gas subjected to pressure and temperature drop is heated by using electric energy or waste heat energy, and thus better energy-saving and environment-friendly performances are obtained.

Description

The device that utilizes natural-gas transfer pipeline pressure reduction to generate electricity

Technical field

The present invention relates to a kind of transformation of energy and utilized device, especially a kind of device that utilizes natural-gas transfer pipeline pressure reduction to generate electricity.

Background technique

Rock gas is widely used in recent years as a kind of energy of high-efficiency cleaning.The rock gas main gas tube will according to different requirements, carry out just can using after step-down is processed to rock gas before entering urban gate station or plant gas.Natural gas transport pressure is 6~8MPa, and industrial gas pressure before entering natural gas user, needs to use voltage adjusting device that pressure is regulated about 0.3~3MPa.The raw natural gas transporting system generally is to pass through first filtering separation before carrying out pressure regulation, promotes temperature by oven again, then reduces pressure by pressure regulator valve, and used oven is generally gas-fired heater.

From thermodynamic theories as can be known, after the pressure regulator valve adjusting, the pressure and temperature of rock gas reduces, and this part pressure reduction can not be utilized at present, has been wasted fully.

Summary of the invention

Cause the deficiency of energy waste with the pressure regulator valve step-down in order to overcome existing gas conveying system, technical problem to be solved by this invention provides a kind of device that utilizes natural-gas transfer pipeline pressure reduction to generate electricity that can utilize pressure reduction to generate electricity when rock gas carries out the pressure regulation conveying.

The technical solution adopted for the present invention to solve the technical problems is: the device that utilizes natural-gas transfer pipeline pressure reduction to generate electricity, described device is arranged between the upstream line and downstream line that has pressure reduction in the gas conveying system, wherein the air pressure in the upstream line is greater than the air pressure in the downstream line, between upstream line and downstream line, be connected with filter separator, between filter separator and downstream line, be provided with heating equipment and expansion power generation machine.

Described heating equipment is Electric heating appliance, perhaps residual heat heat-exchanging device.

Further be that described heating equipment is arranged between filter separator and the expansion power generation machine.

Further be to be provided with gas-liquid separation device behind the described expansion power generation machine.

The invention has the beneficial effects as follows: adopt the expansion power generation machine to replace pressure regulator valve to realize voltage regulation function, pressure regulation can externally be done work simultaneously, pressure reduction can be converted to electric energy or cold energy output, and can obtain liquid light hydrocarbon, realizes taking full advantage of of resource; Utilize the rock gas of electric energy or waste heat energy heating step-down cooling, more energy-conserving and environment-protective.

Description of drawings

Fig. 1 is the schematic diagram of existing gas conveying system.

Fig. 2 is schematic diagram of the present invention.

Be labeled as 1-upstream line, 2-downstream line, 3-oven, 4-pressure regulator valve, 5-heating equipment, 6-expansion power generation machine, 7-gas-liquid separation device, 8-filter separator, 9-waste heat source, 10-liquid light hydrocarbon gathering-device among the figure.

Embodiment

The present invention is further described below in conjunction with accompanying drawing.

As shown in Figure 1, existing gas conveying system passes through first filter separator 8 filtering separation, promote temperature by oven 3 again, then reduce pressure by pressure regulator valve, used oven 3 is generally gas-fired heater, and burning will produce large quantity of exhaust gas, and with pressure regulator valve 4 step-downs, underuse the pressure reduction energy between the pipeline of upstream and downstream, cause energy waste.

As shown in Figure 2, the device that utilizes natural-gas transfer pipeline pressure reduction to generate electricity of the present invention, described device is arranged between the upstream line 1 and downstream line 2 that has pressure reduction in the gas conveying system, wherein the air pressure in the upstream line 1 is greater than the air pressure in the downstream line 2, between upstream line 1 and downstream line 2, be connected with filter separator 8, between filter separator 8 and downstream line 2, be provided with heating equipment 5 and expansion power generation machine 6.After adopting expansion power generation machine 6, require the relevant parameter of design expansion power generation machine according to the pressure of downstream line 2, rock gas carries out adiabatic expansion in the decompressor of expansion power generation machine 6, gas pressure and the temperature of decompressor outlet reduce, thereby replace pressure regulator valve 4 to realize voltage regulation function; And can externally do work, namely the generator by decompressor driving expansion power generation machine 6 is electric energy with transformation of energy, thereby realizes the utilization of pressure reduction energy, heating equipment 5 is set reaches minimum delivery temperature requirement to guarantee the rock gas that enters downstream line 2, ensures delivery safety.Owing to not re-using existing gas-fired heater, and utilizing electric energy or waste heat energy heating, having saved the combustion gas resource.

Described heating equipment 5 can be Electric heating appliance, before apparatus of the present invention start, can utilize other power supply to provide electric energy for heating equipment 5, after apparatus of the present invention normal operation, can utilize apparatus of the present invention to provide electric energy for it.

When having ready conditions, described heating equipment 5 also can be residual heat heat-exchanging device, need configuration waste heat source 9 this moment, especially the waste heat that is fit to often be lost in the low-temperature flue gas waste heat of the no acidic gas componant below 170 ° or the existing techniques such as waste gas more than 170 ℃ with temperature is as waste heat source 9, requires the heat must be relatively stable.Thereby saving power is fully recycled low temperature exhaust heat again simultaneously in the lump.

Described heating equipment 5 can be arranged on front or the back of expansion power generation machine 6, preferably be arranged on the front, namely be arranged between filter separator 8 and the expansion power generation machine 6, its expansion power generation machine 6 outlet temperatures are raise, avoid being applicable in the 6 interior uses of expansion power generation machine the material of low temperature environment, reduce cost.

Further be, be provided with gas-liquid separation device 7 behind the described expansion power generation machine 6, then also the cryogenic natural gas that expansion power generation machine 6 is discharged can be used as refrigeration heat sink this moment, by the gas throttling swell refrigeration, the natural gas temperature of expansion power generation machine 6 of flowing through reduces, produce liquid light hydrocarbon, liquid light hydrocarbon is that relative high molecular weight component liquefaction comes in the rock gas, after liquid light hydrocarbon is separated by gas-liquid separation device 7, enter liquid light hydrocarbon gathering-device 10, for industrial or civilian, the rock gas of gaseous state enters downstream line 2 as LNG Liquefied natural gas, and cold energy can the externally output by the apposition heat-exchanger rig.

Claims (6)

1. the device that utilizes natural-gas transfer pipeline pressure reduction to generate electricity, described device is arranged between the upstream line (1) and downstream line (2) that has pressure reduction in the gas conveying system, wherein the air pressure in the upstream line (1) is greater than the air pressure in the downstream line (2), between upstream line (1) and downstream line (2), be connected with filter separator (8), it is characterized in that: between filter separator (8) and downstream line (2), be provided with heating equipment (5) and expansion power generation machine (6).
2. the device that utilizes natural-gas transfer pipeline pressure reduction to generate electricity as claimed in claim 1, it is characterized in that: described heating equipment (5) is Electric heating appliance.
3. the device that utilizes natural-gas transfer pipeline pressure reduction to generate electricity as claimed in claim 1, it is characterized in that: described heating equipment (5) is residual heat heat-exchanging device.
4. such as claim 1, the 2 or 3 described devices that utilize natural-gas transfer pipeline pressure reduction to generate electricity, it is characterized in that: described heating equipment (5) is arranged between filter separator (8) and the expansion power generation machine (6).
5. the device that utilizes natural-gas transfer pipeline pressure reduction to generate electricity as claimed in claim 4 is characterized in that: be provided with gas-liquid separation device (7) behind the described expansion power generation machine (6).
6. such as claim 1, the 2 or 3 described devices that utilize natural-gas transfer pipeline pressure reduction to generate electricity, it is characterized in that: be provided with gas-liquid separation device (7) behind the described expansion power generation machine (6).
CN201210403284XA 2012-10-22 2012-10-22 Device for generating power by using pressure difference energy of natural gas delivery pipeline CN102900640A (en)

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Application Number Priority Date Filing Date Title
CN201210403284XA CN102900640A (en) 2012-10-22 2012-10-22 Device for generating power by using pressure difference energy of natural gas delivery pipeline

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104632129A (en) * 2015-02-09 2015-05-20 歌思(天津)低温设备有限公司 Device for heating wellhead gases
CN104632128A (en) * 2014-12-31 2015-05-20 西南石油大学 Anti-freezing and anti-blocking system for condensate gas field high pressure gas exploitation pipelines
CN107575744A (en) * 2017-08-14 2018-01-12 新地能源工程技术有限公司 Natural gas pressure regulating generating integration device and method
US9913004B2 (en) 2015-09-18 2018-03-06 General Electric Company Self-powered utility delivery system
US10084313B2 (en) 2015-09-18 2018-09-25 General Electric Company Self-powered utility delivery system

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WO1999041164A1 (en) * 1998-02-13 1999-08-19 Sydkraft Ab Method in operating a cavern for gas
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CN202209192U (en) * 2011-08-30 2012-05-02 上海申能临港燃机发电有限公司 Natural gas differential pressure power generation device
CN202325702U (en) * 2011-11-17 2012-07-11 重庆川然节能技术有限公司 Natural gas pressure difference power generation system self-adapting to rear-end load change
CN202339065U (en) * 2011-12-09 2012-07-18 青岛中油通用机械有限公司 Natural gas transmission trunk line differential pressure type energy-saving liquefying device
CN202867117U (en) * 2012-10-22 2013-04-10 成都昊特新能源技术有限公司 Device of utilizing natural gas transportation pipe pressure differences to generating electricity

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WO1999041164A1 (en) * 1998-02-13 1999-08-19 Sydkraft Ab Method in operating a cavern for gas
CN2442180Y (en) * 2000-08-31 2001-08-08 乌鲁木齐市晖映新技术开发有限公司 Anti-explosion pipeline electric heater
CN2755288Y (en) * 2004-11-03 2006-02-01 上海工程技术大学 Combined generator by natural gas transmission and distribution line differential pressure
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CN202325702U (en) * 2011-11-17 2012-07-11 重庆川然节能技术有限公司 Natural gas pressure difference power generation system self-adapting to rear-end load change
CN202339065U (en) * 2011-12-09 2012-07-18 青岛中油通用机械有限公司 Natural gas transmission trunk line differential pressure type energy-saving liquefying device
CN202867117U (en) * 2012-10-22 2013-04-10 成都昊特新能源技术有限公司 Device of utilizing natural gas transportation pipe pressure differences to generating electricity

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104632128A (en) * 2014-12-31 2015-05-20 西南石油大学 Anti-freezing and anti-blocking system for condensate gas field high pressure gas exploitation pipelines
CN104632128B (en) * 2014-12-31 2018-03-13 西南石油大学 The anti-frozen block system of gas condensate field high pressure flowline
CN104632129A (en) * 2015-02-09 2015-05-20 歌思(天津)低温设备有限公司 Device for heating wellhead gases
CN104632129B (en) * 2015-02-09 2017-04-19 歌思(天津)低温设备有限公司 Device for heating wellhead gases
US9913004B2 (en) 2015-09-18 2018-03-06 General Electric Company Self-powered utility delivery system
US10084313B2 (en) 2015-09-18 2018-09-25 General Electric Company Self-powered utility delivery system
CN107575744A (en) * 2017-08-14 2018-01-12 新地能源工程技术有限公司 Natural gas pressure regulating generating integration device and method
CN107575744B (en) * 2017-08-14 2019-11-12 新地能源工程技术有限公司 Natural gas pressure regulating generating integration device and method

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Address after: The people of Wuhou District road Chengdu city Sichuan province 610041 four Branch Road No. 3

Applicant after: Chengdu Hot New Energy Technology Co., Ltd.

Address before: The people of Wuhou District road Chengdu city Sichuan province 610041 four Branch Road No. 3 National 863 software incubator base in Sichuan 3 floor

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Application publication date: 20130130