CN205117427U - Electricity generation of natural atmospheric pressure difference combines electricity generation of organic rankine cycle to retrieve cold volume system - Google Patents
Electricity generation of natural atmospheric pressure difference combines electricity generation of organic rankine cycle to retrieve cold volume system Download PDFInfo
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- CN205117427U CN205117427U CN201520899017.5U CN201520899017U CN205117427U CN 205117427 U CN205117427 U CN 205117427U CN 201520899017 U CN201520899017 U CN 201520899017U CN 205117427 U CN205117427 U CN 205117427U
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Abstract
The utility model provides an electricity generation of natural atmospheric pressure difference combines organic rankine cycle (ORC) electricity generation to retrieve cold volume system, including natural atmospheric pressure difference power generation system and organic rankine cycle power generation system. Wherein, natural atmospheric pressure difference power generation system includes dewatering device, a turboexpander, first generator and heat exchanger, organic rankine cycle (ORC) power generation system includes the 2nd turboexpander, second generator, condenser (foretell heat exchanger), circulating pump, evaporimeter and low temperature heat source. The utility model discloses an electricity generation of natural atmospheric pressure difference combines electricity generation of organic rankine cycle to retrieve cold volume system can realize generating electricity the high -pressure natural gas decompression of input to the low pressure natural gas, at the drop in temperature of the step -down in -process natural gas, utilizes organic rankine cycle to retrieve the cold volume of the microthermal natural gas, and energy saving and emission reduction is realized better to the ability make full use of energy.
Description
Technical field
The utility model relates to the generating of a kind of natural gas pressure difference and reclaims cold system in conjunction with organic Rankine bottoming cycle (ORC) generating, belongs to field of resource recovery technique.
Background technique
Rock gas needs high-pressure transport, and arriving user side needs decompression.Traditional pressure regulating method adopts throttle valve expansion step-down, and in throttling process, exergy destruction is comparatively large, and a large amount of energy has been wasted.Carry out pressure regulation according to turbo-expander, in pressure regulation process, pressure reduces, and temperature reduces, and can produce pressure energy and the cold energy of a large amount of high-quality.
Summary of the invention
The utility model, for solving the deficiencies in the prior art, provides a kind of natural gas pressure difference to generate electricity in conjunction with organic Rankine bottoming cycle generating recovery cold system.
For achieving the above object, the utility model takes following technical proposals:
A kind of natural gas pressure difference generating reclaims cold system in conjunction with organic Rankine bottoming cycle generating, comprises natural gas pressure difference generating system and organic Rankine cycle power generation system; Natural gas pressure difference generating system comprises dewatering unit, the first turbo-expander, the first generator and heat exchanger, high-pressure natural gas is connected with dewatering unit by pipeline, the outlet of dewatering unit is connected with the first turbo-expander, the outlet of the first turbo-expander is connected with heat exchanger and the first generator respectively, the outlet of heat exchanger is connected for user with low pressure natural gas, and the first generator is connected with electricity consumption electrical network; Organic Rankine cycle power generation system comprises the second turbo-expander, the second generator, described heat exchanger, recycle pump, vaporizer and low-temperature heat source, and described heat exchanger uses as condenser; Circulating-pump outlet is connected with vaporizer, and the outlet of vaporizer is connected with the second turbo-expander, and the outlet of the second turbo-expander is connected with the second generator with condenser respectively, and the outlet of condenser is connected with recycle pump, and low-temperature heat source is connected with vaporizer.
Described dewatering unit adopts molecular sieve adsorption to carry out dewatered clean to high-pressure natural gas.
In described natural gas pressure difference generating system, between high-pressure natural gas outlet and low pressure natural gas import, be provided with pressure regulator valve group bypass system.
Described low-temperature heat source is industrial waste heat resource, solar energy or the underground heat of temperature 80 DEG C-250 DEG C.
System of the present utility model can realize, by the decompression of the high-pressure natural gas of input, utilizing organic Rankine bottoming cycle to reclaim cold to the heat exchange gas of low temperature, can make full use of the energy, thus realize energy-saving and emission-reduction while utilizing differential pressure power generation.
Accompanying drawing explanation
Fig. 1 is that a kind of natural gas pressure difference generating of the present utility model reclaims cold system diagram in conjunction with organic Rankine bottoming cycle generating; In figure except the word indicated, 1-dewatering unit; 2-first turbo-expander; 3-first generator; 4-pressure regulator valve group; 5-vaporizer; 6-heat exchanger (condenser); 7-recycle pump; 8-second turbo-expander; 9-second generator.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further illustrated.
A kind of natural gas pressure difference generating of the present utility model reclaims cold system in conjunction with organic Rankine bottoming cycle generating, comprises natural gas pressure difference generating system and organic Rankine cycle power generation system.Natural gas pressure difference generating system utilizes the pressure energy direct expansion of gas distributing system to generate electricity, and most pressure energy is converted into mechanical work, drives generator to be converted to electric energy.The cold fire that some pressure energy is converted to rock gas after turbo-expander expands is used, in order to utilize this part energy, and prevent cryogenic natural gas from causing gas pipeline to occur " ice blocks up " phenomenon, by being heated by the cryogenic natural gas after step-down in conjunction with organic rankine cycle system, realize making full use of of the energy.Organic Rankine cycle power generation system is using Rankine cycle as theoretical foundation, replaces water as working medium, reclaim the power cycle of middle-low grade heat energy with organic substance.
Natural gas pressure difference generating system comprises dewatering unit 1, first turbo-expander 2, first generator 3 and heat exchanger 6.Dewatering unit 1 is connected with the first turbo-expander 2, and the first turbo-expander 2 is connected with the first generator 3, heat exchanger 6 respectively, and the first generator 3 is connected with electricity consumption electrical network.Dewatering unit 1 carries out processed to high-pressure natural gas before pressure regulation.More or less all a small amount of H can be there is in high-pressure natural gas
2o, after turbo-expander expansion step-down, pressure reduces, and temperature also can sharply reduce, and causes natural gas in low temperature, pipeline may be made to freeze, produce hydrate etc. and affect the conveying of rock gas; In addition, when, humidity lower in ambient temperature is larger, pipeline also may freeze outward in a large number.Dewatering unit 1 adopts adsorption method dedicated molecular sieve used efficiently, carries out dewatered clean to rock gas, can not only remove contained humidity in rock gas efficiently, can also remove H wherein
2s, SO
2and CO
2etc. harmful components, rock gas is made to reach highly purified quality.
Organic rankine cycle system comprises the second turbo-expander 8, second generator 9, condenser 6 (namely above-mentioned heat exchanger 6), recycle pump 7, vaporizer 5 and low-temperature heat source.Low-temperature heat source can be industrial waste heat resource (waste water, flue gas etc.) and the utilization of new energy resources such as solar energy, the underground heat resource of 80 DEG C-250 DEG C.
Bypass system pressure regulator valve group 4 is provided with between the outlet of natural gas pressure difference generating system high-pressure natural gas and low pressure natural gas import.Bypass system can switch use when differential pressure power generation fault or maintenance, ensures the stable operation of whole system.
The working procedure of the utility model system:
First high-pressure natural gas enters dewatering unit 1, carries out dewatered clean to rock gas, secondly drives the first generator 3 to generate electricity by the first turbo-expander 2.After being done work by the first turbo-expander 2, gas pressure reduces, and temperature reduces, and the rock gas after the desuperheat that reduces pressure afterwards obtains low pressure natural gas after being raised by heat exchanger 6 heat-exchange temperature, and input low pressure natural gas is for user.
In organic Rankine bottoming cycle, organic media is recycled pump 7 and pressurizes and send into vaporizer 5, the heat energy that absorption low-temperature heat source provides also gasifies, sending into the second turbo-expander 8 expansion work after reaching higher pressure drives the second generator 9 to generate electricity, condenser 6 is sent into after expanding into condensing pressure, liquid state is condensed into by the rock gas of low temperature, send into recycle pump 7, complete circulation.
The utility model utilizes natural gas pressure difference to generate electricity and reclaims cold system in conjunction with organic Rankine bottoming cycle generating, while the high-pressure natural gas of input can be realized completely to be decompressed to needing pressure rock gas, utilizes expander to generate electricity; The part of cold as organic Rankine cycle power generation system is reclaimed to the rock gas of low temperature simultaneously, while generating, reclaim cold, achieve energy-saving and emission-reduction better.
The foregoing is only a preference mode of execution of system described in the utility model, do not form the restriction to the utility model protection domain.Any do within spirit of the present utility model and principle any amendment, equivalent to replace and improvement etc., all should be included within claims of the present utility model.
Claims (4)
1. natural gas pressure difference generating reclaims a cold system in conjunction with organic Rankine bottoming cycle generating, and it is characterized in that, this system comprises natural gas pressure difference generating system and organic Rankine cycle power generation system; Natural gas pressure difference generating system comprises dewatering unit, the first turbo-expander, the first generator and heat exchanger, high-pressure natural gas is connected with dewatering unit by pipeline, the outlet of dewatering unit is connected with the first turbo-expander, the outlet of the first turbo-expander is connected with heat exchanger and the first generator respectively, the outlet of heat exchanger is connected for user with low pressure natural gas, and the first generator is connected with electricity consumption electrical network; Organic Rankine cycle power generation system comprises the second turbo-expander, the second generator, described heat exchanger, recycle pump, vaporizer and low-temperature heat source, and described heat exchanger uses as condenser; Circulating-pump outlet is connected with vaporizer, and the outlet of vaporizer is connected with the second turbo-expander, and the outlet of the second turbo-expander is connected with the second generator with condenser respectively, and the outlet of condenser is connected with recycle pump, and low-temperature heat source is connected with vaporizer.
2. a kind of natural gas pressure difference generating as claimed in claim 1 reclaims cold system in conjunction with organic Rankine bottoming cycle generating, and it is characterized in that, described dewatering unit adopts molecular sieve adsorption to carry out dewatered clean to high-pressure natural gas.
3. a kind of natural gas pressure difference generating as claimed in claim 1 reclaims cold system in conjunction with organic Rankine bottoming cycle generating, it is characterized in that, in described natural gas pressure difference generating system, between high-pressure natural gas outlet and low pressure natural gas import, be provided with pressure regulator valve group bypass system.
4. a kind of natural gas pressure difference generating as described in one of claims 1 to 3 reclaims cold system in conjunction with organic Rankine bottoming cycle generating, and it is characterized in that, described low-temperature heat source is industrial waste heat resource, solar energy or the underground heat of temperature 80 DEG C-250 DEG C.
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| CN201520899017.5U CN205117427U (en) | 2015-11-12 | 2015-11-12 | Electricity generation of natural atmospheric pressure difference combines electricity generation of organic rankine cycle to retrieve cold volume system |
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| CN201520899017.5U CN205117427U (en) | 2015-11-12 | 2015-11-12 | Electricity generation of natural atmospheric pressure difference combines electricity generation of organic rankine cycle to retrieve cold volume system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106837438A (en) * | 2017-01-20 | 2017-06-13 | 中国科学院工程热物理研究所 | A kind of pressure energy of natural gas and cold energy combined recovery system of automobile and method |
| CN107013271A (en) * | 2017-04-28 | 2017-08-04 | 申能股份有限公司 | Natural gas power complementary energy synthesis utilizes system |
| CN107701244A (en) * | 2017-11-02 | 2018-02-16 | 国电龙源节能技术有限公司 | Steam turbine coaxially drags the system and its combination method of two asynchronous generating units |
| CN115681040A (en) * | 2022-11-10 | 2023-02-03 | 北京市煤气热力工程设计院有限公司 | Energy comprehensive utilization system and method for photovoltaic photo-thermal coupling differential pressure power generation |
| CN115703982A (en) * | 2021-08-17 | 2023-02-17 | 中国石油天然气股份有限公司 | Sulfur-containing station yard comprehensive energy supply system |
-
2015
- 2015-11-12 CN CN201520899017.5U patent/CN205117427U/en active Active
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106837438A (en) * | 2017-01-20 | 2017-06-13 | 中国科学院工程热物理研究所 | A kind of pressure energy of natural gas and cold energy combined recovery system of automobile and method |
| CN106837438B (en) * | 2017-01-20 | 2019-03-22 | 中国科学院工程热物理研究所 | A kind of pressure energy of natural gas and cold energy combined recovery system of automobile and method |
| CN107013271A (en) * | 2017-04-28 | 2017-08-04 | 申能股份有限公司 | Natural gas power complementary energy synthesis utilizes system |
| CN107013271B (en) * | 2017-04-28 | 2023-09-22 | 申能股份有限公司 | Comprehensive utilization system for natural gas power generation complementary energy |
| CN107701244A (en) * | 2017-11-02 | 2018-02-16 | 国电龙源节能技术有限公司 | Steam turbine coaxially drags the system and its combination method of two asynchronous generating units |
| CN115703982A (en) * | 2021-08-17 | 2023-02-17 | 中国石油天然气股份有限公司 | Sulfur-containing station yard comprehensive energy supply system |
| CN115681040A (en) * | 2022-11-10 | 2023-02-03 | 北京市煤气热力工程设计院有限公司 | Energy comprehensive utilization system and method for photovoltaic photo-thermal coupling differential pressure power generation |
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