CN105003310A - Pressure energy electricity generation compression system of natural gas pipe network - Google Patents
Pressure energy electricity generation compression system of natural gas pipe network Download PDFInfo
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- CN105003310A CN105003310A CN201510463417.6A CN201510463417A CN105003310A CN 105003310 A CN105003310 A CN 105003310A CN 201510463417 A CN201510463417 A CN 201510463417A CN 105003310 A CN105003310 A CN 105003310A
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- pipe network
- pressure energy
- gas pipe
- bypass line
- natural gas
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Abstract
The invention provides a pressure energy electricity generation compression system of a natural gas pipe network. The pressure energy electricity generation compression system comprises an electricity generation device, a compression device, a heat exchange device and a gas distribution system. The electricity generation device comprises an expansion device and a double-shaft electric generator. A gas inlet and a gas outlet of the expansion device are connected on a branch pipeline in series. A power output shaft of the expansion device is connected with a power input shaft of the double-shaft electric generator. A power output shaft of the double-shaft electric generator drives the compression device to compress natural gas. The compressed natural gas is cooled by the heat exchange device and then is delivered to the gas distribution system. According to the pressure energy electricity generation compression system of the natural gas pipe network, the expansion device can generate electricity through fluid in the branch pipeline; meanwhile, the expansion device drives the compression device to compress the natural gas through the double-shaft electric generator, and secondary energy conversion is not needed. Moreover, the heat exchange device conducts heat exchange between low-temperature fluid generated after the expansion device expands and generates electricity and high-temperature fluid compressed and heated by the compression device, and an independent heating device and an independent cooling device are omitted.
Description
Technical field
The present invention relates to CNG to pressurize field, be specifically related to a kind of pressure energy generating pressurized equipment that not only can generate electricity but also CNG pressurization can be carried out.
Background technique
In existing sky hot gas CNG condensation technique, typically use air compressor to pressurize to rock gas, or use air compression station compressed natural gas, then tank car or gas selling machine use is distributed to, remainder can be stored by gas storage equipment, in pressure process, the electric energy of air compressor is from civil power, needs to consume a large amount of civil power, and energy consumption is large.
Summary of the invention
The goal of the invention of the application is to solve current above-mentioned technical problem, and provides one to generate electricity simultaneously and to pressurize, the sky hot gas pipe network pressure energy generating pressurizing system of the saving energy not needing energy secondary to change.
In order to complete the goal of the invention of the application, the application by the following technical solutions:
Sky of the present invention hot gas pipe network pressure energy generating pressurizing system, be positioned in the bypass line of gas distributing system main pipeline parallel connection, comprise electricity generating device, pressurization device, heat-exchange device and combustion gas distribution system, described electricity generating device comprises bloating plant and twin shaft generator, the suction port of described bloating plant and air outlet are connected in described bypass line, the pto＝power take-off of described bloating plant is connected with the power input shaft of twin shaft generator, the pto＝power take-off of twin shaft generator drives pressurization device compressed natural gas, natural gas via after pressurization exports to combustion gas distribution system after crossing heat-exchange device cooling.
Pressurization device of the present invention is compressor, described compressor is driven by the pto＝power take-off of twin shaft generator, the air intake of described compressor is connected in described bypass line, combustion gas in bypass line enters into compressor through the air intake of the first branch road and compressor, combustion gas distribution system is delivered to through the relief opening of overcompression machine and heat-exchange device after pressurization, combustion gas in described bypass line enters into bloating plant through the suction port of the second branch road and bloating plant, be back in described main pipeline through the relief opening of overexpansion equipment and heat-exchange device after expansion power generation, described first branch road and/or the second branch road are provided with modulating valve.
Heat-exchange device of the present invention is tubular heat exchanger, comprise housing and be arranged on the hollow structure in described housing, the two ends of described enclosure interior are respectively provided with a tube sheet, space between two tube sheets forms hollow structure, described housing is provided with the import and outlet that are communicated with described hollow structure, wherein import is connected with the air outlet of compressor, outlet is connected with combustion gas distribution system, the honeycomb duct that many run through two tube sheets is provided with in described hollow structure, combustion gas after expansion power generation is back in the hollow structure of described housing in described main pipeline through honeycomb duct described in institute's root and is also provided with deflection plate.
Combustion gas distribution system of the present invention comprise tuner and be connected with tuner respectively add gas column, gas selling machine and caisson.
First branch road of the present invention is also provided with exsiccator, and described bloating plant is screw expander, turbo-expander or fluid motor.
The present invention also comprises PLC, the bypass line of described bloating plant upstream and the downstream leg pipeline of heat exchanger are respectively equipped with direct-operated regulator, thermometer and pressure meter, and described direct-operated regulator, thermometer and pressure meter are connected with described PLC respectively.
The power output end of twin shaft generator of the present invention connects electrical control cabinet and electric accumulator.
Bypass line of the present invention is also provided with stop valve.
Sky of the present invention hot gas pipe network pressure energy generating pressurizing system is compared with prior art distinguished and is: the bloating plant of sky of the present invention hot gas pipe network pressure energy generating pressurizing system can utilize the fluid dynamic energy in bypass line or pressure energy to generate electricity, simultaneously bloating plant to pressurize to rock gas by twin shaft generator drive pressurization device and then flows to tank car or gas selling machine, energy secondary is not needed to change, improve energy utilization rate, and heat-exchange device of the present invention utilize bloating plant expansion power generation after cryogen and the pressurization device high temperature fluid after heating up that pressurizes carry out heat exchange, eliminate independently heating apparatus and cooling device.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of sky of the present invention hot gas pipe network pressure energy generating pressurizing system;
Fig. 2 is the structural representation of tubular heat exchanger of the present invention.
Embodiment
As shown in Figure 1, the sky hot gas pipe network pressure energy generating pressurizing system of the present embodiment, be positioned in the bypass line 2 in parallel with gas distributing system main pipeline 1, namely bypass line 2 is picked out from the main pipeline 1 of gas distributing system, then the pressurizing system that generates electricity utilizes the fluid dynamic energy in bypass line 2 or pressure energy to generate electricity, the pressurizing system that simultaneously generates electricity pressurizes to rock gas and then flows to tank car 8 or gas selling machine 9, and sky hot gas pipe network pressure energy generating pressurizing system comprises electricity generating device, pressurization device, heat-exchange device and combustion gas distribution system.
Particularly, electricity generating device comprises bloating plant 3 and twin shaft generator 4, bloating plant 3 outwards exports principle that mechanical work makes gas temperature reduce when utilizing expansion of compressed gas step-down to obtain the machinery of energy, bloating plant 3 has suction port, air outlet and pto＝power take-off, in the present embodiment, the suction port of bloating plant 3 and air outlet are connected in bypass line 2, the pto＝power take-off of bloating plant 3 is connected with the power input shaft of twin shaft generator 4, the pto＝power take-off of twin shaft generator 4 drives pressurization device compressed natural gas, natural gas via after pressurization exports to combustion gas distribution system after crossing heat-exchange device cooling, bloating plant 3 can be screw expander, turbo-expander or fluid motor.
Pressurization device in the present embodiment is compressor 5, compressor 5 has air intake and relief opening, this compressor 5 is driven by the pto＝power take-off of twin shaft generator 4, the air intake of compressor 5 to be connected in bypass line 2 and to be positioned at the front end of bloating plant 3 suction port, such bypass line 2 is divided into the first branch road 21 and the second branch road 22, combustion gas in bypass line 2 enters into compressor 5 through the air intake of the first branch road 21 and compressor 5, compressor 5 pairs of rock gas pressurizations heat up, combustion gas distribution system is delivered to through the relief opening of overcompression machine 5 and heat-exchange device after rock gas pressurization, through heat-exchange device, rock gas after pressurization provides heat energy for exchanging.Combustion gas in bypass line 2 enters into bloating plant 3 through the suction port of the second branch road 22 and bloating plant 3, bloating plant 3 utilizes rock gas expansion cooling generating, be back in main pipeline 1 through the air outlet of overexpansion equipment 3 and heat-exchange device after rock gas expansion power generation, cryogenic natural gas after generating provides cold energy for exchanging, in order to ensure the sky hot air temperature after heat exchange to reach requirement, (fuel gas temperature be namely back in main pipeline 1 can not lower than the fuel gas temperature in main pipeline 1, tolerance is 1 degree, the fuel gas temperature simultaneously entering combustion gas distribution system can not higher than 60 DEG C, modulating valve to be provided with on the first branch road 21 and/or the second branch road 22, the flow-rate ratio in the flow in the first branch road 21 and the second branch road 22 is generally made to be 1:3, because the fuel gas temperature after pressurization is up to 250 degree, and the natural gas temperature after generating cooling is subzero about 70 degree, so the temperature after heat-exchange device heat exchange may be still very high, in order to ensure safety, can to connect between heat-exchange device and combustion gas distribution system cooling device, in order to filter the moisture in rock gas, first branch road 21 is also provided with exsiccator.
As shown in Figure 1-2, heat-exchange device is tubular heat exchanger 6, the hollow structure 64 comprising housing 61 and be arranged in housing 61, the two ends of housing 61 inside are respectively provided with a tube sheet 65, space between two tube sheets 65 forms hollow structure 64, housing 61 is provided with the import 62 that is communicated with hollow structure 64 and exports 63, wherein import 62 is connected with the air outlet of compressor 5, outlet 63 is connected with combustion gas distribution system, the honeycomb duct 66 that many run through two tube sheets 65 is provided with in hollow structure 64, combustion gas after expansion power generation is back in main pipeline 1 through honeycomb duct 66, fully heat exchange is carried out in order to make fluid, deflection plate 67 is also provided with in hollow structure 64, make fluid abundant heat exchange of long-time delay in body.Such utilization sky hot gas pipe network pressure energy generating pressurizing system can complete heat exchange automatically, saves and additionally installs the equipment of rising again and cooling system additional, and avoid energy secondary conversion, greatly improve energy utilization rate.
As shown in Figure 1, combustion gas distribution system comprise tuner 7 and be connected with tuner 7 respectively add gas column, gas selling machine 9 and caisson 10, wherein add gas column and can provide rock gas to tank car 8 or gas selling machine 9, unnecessary rock gas can be stored by air-out apparatus, when pressurized natural gas quantity not sufficient, can be supplemented by caisson 10.
The sky hot gas pipe network pressure energy generating pressurizing system of this enforcement is also provided with auto-control protective device, auto-control protective device comprises PLC, direct-operated regulator, thermometer and pressure meter, the bypass line 2 of bloating plant 3 upstream and the downstream leg pipeline 2 of heat exchanger arrange direct-operated regulator respectively, thermometer and pressure meter, direct-operated regulator, thermometer is connected with PLC respectively with pressure meter, Monitoring Data can be transferred to PLC by thermometer and pressure meter constantly, when power generation system breaks down, pressure in bypass line 2 or temperature there will be exception, when thermometer and manometric Monitoring Data exceed warning value, PLC can cut off the fluid in bypass line 2 by direct-operated regulator, and remind maintenance man to carry out checking and maintenance, bypass line 2 is also provided with stop valve, multiple protection measure is provided, ensure security of system.
As shown in Figure 1, the power output end of twin shaft generator 4 connects electrical control cabinet and electric accumulator, and electric energy is carried out distribution and exports to the facility uses such as valve, instrument, monitoring, technical precaution by electrical control cabinet, and unnecessary electric energy will be stored by electric accumulator.
More than describing is explanation of the invention, and be not the restriction to invention, limited range of the present invention is see claim, and when without prejudice to spirit of the present invention, the present invention can do any type of amendment.
Claims (8)
1. a sky hot gas pipe network pressure energy generating pressurizing system, be positioned in the bypass line of gas distributing system main pipeline parallel connection, comprise electricity generating device, pressurization device, heat-exchange device and combustion gas distribution system, it is characterized in that: described electricity generating device comprises bloating plant and twin shaft generator, the suction port of described bloating plant and air outlet are connected in described bypass line, the pto＝power take-off of described bloating plant is connected with the power input shaft of twin shaft generator, the pto＝power take-off of twin shaft generator drives pressurization device compressed natural gas, natural gas via after pressurization exports to combustion gas distribution system after crossing heat-exchange device cooling.
2. according to claim 1 day hot gas pipe network pressure energy generating pressurizing system, it is characterized in that: described pressurization device is compressor, described compressor is driven by the pto＝power take-off of twin shaft generator, the air intake of described compressor is connected in described bypass line, combustion gas in bypass line enters into compressor through the air intake of the first branch road and compressor, combustion gas distribution system is delivered to through the relief opening of overcompression machine and heat-exchange device after pressurization, combustion gas in described bypass line enters into bloating plant through the suction port of the second branch road and bloating plant, be back in described main pipeline through the relief opening of overexpansion equipment and heat-exchange device after expansion power generation, described first branch road and/or the second branch road are provided with modulating valve.
3. according to claim 2 day hot gas pipe network pressure energy generating pressurizing system, it is characterized in that: described heat-exchange device is tubular heat exchanger, comprise housing and be arranged on the hollow structure in described housing, the two ends of described enclosure interior are respectively provided with a tube sheet, space between two tube sheets forms hollow structure, described housing is provided with the import and outlet that are communicated with described hollow structure, wherein import is connected with the air outlet of compressor, outlet is connected with combustion gas distribution system, the honeycomb duct that many run through two tube sheets is provided with in described hollow structure, combustion gas after expansion power generation is back in the hollow structure of described housing in described main pipeline through honeycomb duct described in institute's root and is also provided with deflection plate.
4. according to claim 3 day hot gas pipe network pressure energy generating pressurizing system, is characterized in that: described combustion gas distribution system comprise tuner and be connected with tuner respectively add gas column, gas selling machine and caisson.
5. according to claim 4 day hot gas pipe network pressure energy generating pressurizing system, it is characterized in that: described first branch road is also provided with exsiccator, described bloating plant is screw expander, turbo-expander or fluid motor.
6. according to claim 5 day hot gas pipe network pressure energy generating pressurizing system, it is characterized in that: also comprise PLC, the bypass line of described bloating plant upstream and the downstream leg pipeline of heat exchanger are respectively equipped with direct-operated regulator, thermometer and pressure meter, and described direct-operated regulator, thermometer and pressure meter are connected with described PLC respectively.
7. according to claim 6 day hot gas pipe network pressure energy generating pressurizing system, is characterized in that: the power output end of described twin shaft generator connects electrical control cabinet and electric accumulator.
8. according to claim 7 day hot gas pipe network pressure energy generating pressurizing system, is characterized in that: described bypass line is also provided with stop valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510463417.6A CN105003310A (en) | 2015-07-31 | 2015-07-31 | Pressure energy electricity generation compression system of natural gas pipe network |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510463417.6A CN105003310A (en) | 2015-07-31 | 2015-07-31 | Pressure energy electricity generation compression system of natural gas pipe network |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105674057A (en) * | 2016-01-28 | 2016-06-15 | 侯奕 | Natural gas pressure difference energy recovery and liquid oxygen generation integrated system |
| CN105757455A (en) * | 2016-04-28 | 2016-07-13 | 华电郑州机械设计研究院有限公司 | Natural gas differential pressure energy recovery unit device |
| CN106930793A (en) * | 2017-04-06 | 2017-07-07 | 碧海舟（北京）节能环保装备有限公司 | Using the refrigeration system of pressure energy of natural gas |
| CN108757056A (en) * | 2018-05-14 | 2018-11-06 | 中国科学院过程工程研究所 | A kind of natural gas pressure difference driving electricity generation system |
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| US20070163256A1 (en) * | 2004-12-22 | 2007-07-19 | Mcdonald Duncan | Apparatus and methods for gas production during pressure letdown in pipelines |
| CN103791690A (en) * | 2014-02-20 | 2014-05-14 | 北京市燃气集团有限责任公司 | Liquefied natural gas producing device and method for using pipeline pressure energy for power generation and refrigeration |
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| CN204214306U (en) * | 2014-09-05 | 2015-03-18 | 江西森泰药业有限公司 | tubular heat exchanger |
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| US20070163256A1 (en) * | 2004-12-22 | 2007-07-19 | Mcdonald Duncan | Apparatus and methods for gas production during pressure letdown in pipelines |
| CN103791690A (en) * | 2014-02-20 | 2014-05-14 | 北京市燃气集团有限责任公司 | Liquefied natural gas producing device and method for using pipeline pressure energy for power generation and refrigeration |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105674057A (en) * | 2016-01-28 | 2016-06-15 | 侯奕 | Natural gas pressure difference energy recovery and liquid oxygen generation integrated system |
| CN105757455A (en) * | 2016-04-28 | 2016-07-13 | 华电郑州机械设计研究院有限公司 | Natural gas differential pressure energy recovery unit device |
| CN106930793A (en) * | 2017-04-06 | 2017-07-07 | 碧海舟（北京）节能环保装备有限公司 | Using the refrigeration system of pressure energy of natural gas |
| CN108757056A (en) * | 2018-05-14 | 2018-11-06 | 中国科学院过程工程研究所 | A kind of natural gas pressure difference driving electricity generation system |
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Application publication date: 20151028 |
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