CN105736082A - Natural gas pressure energy power generation technology and device with heat pump - Google Patents
Natural gas pressure energy power generation technology and device with heat pump Download PDFInfo
- Publication number
- CN105736082A CN105736082A CN201610229985.4A CN201610229985A CN105736082A CN 105736082 A CN105736082 A CN 105736082A CN 201610229985 A CN201610229985 A CN 201610229985A CN 105736082 A CN105736082 A CN 105736082A
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- Prior art keywords
- heat pump
- heater
- power generation
- natural gas
- gas
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K25/00—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for
- F01K25/08—Plants or engines characterised by use of special working fluids, not otherwise provided for; Plants operating in closed cycles and not otherwise provided for using special vapours
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/02—Pipe-line systems for gases or vapours
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/52—Heat recovery pumps, i.e. heat pump based systems or units able to transfer the thermal energy from one area of the premises or part of the facilities to a different one, improving the overall efficiency
Abstract
The invention relates to a natural gas pressure energy power generation technology and device with a heat pump. Low-temperature natural gas generated after expansion power generation is reheated through the heat pump. A large amount of pressure energy is released in the process that a high-pressure pipe network supplies natural gas to a downstream pipe network. According to the technology and device, the pressure energy of the high-pressure natural gas is utilized for power generation, and cold energy generated in the pressure reducing process is recycled through the heat pump, so that the economic benefits of enterprises are improved; and the contamination problem brought by power generation of a power plant is avoided while power generation is achieved, and the requirements of energy saving and environment friendliness are met.
Description
Technical field
The present invention relates to and a kind of utilize pressure energy of natural gas generating and reclaim technique and the device of cold energy, be specifically related to a kind of utilize expansion power generation unit to generate electricity and adopt technique and the device of heat pump cycle re-heat.
Background technology
Natural valve station owner to act on the pressure being the pipe network gas of high pressure, sub-high pressure is decompressed to downstream pipe network, adds smelly and delivers to city medium pressure gas network.The huge overbottom pressure waste energy resource contained in gas distributing system, it is possible to be widely used in the multiple uses such as generating, pressure regulation gas storage, refrigeration, production LNG.But, owing to natural gas via crosses multi-stage pressure regulating, voltage regulating station scattered distribution, natural gas overbottom pressure is utilized and brings difficulty.
Natural gas pipe network pressure energy is generated electricity by decompressor, has and takes up an area little, feature that feasibility is high, is the first-selection that can recycle of city natural gas pipe network pressure.Simultaneously, utilize the differential pressure power generation supply of natural gas before and after pressure regulation station illumination station within, remotely monitor and winter the required electric power such as heat tracing, can solving the realistic problem being badly in need of solving in station at present on the one hand, electric power unnecessary on the other hand can do grid-connected process, has great importance.
Summary of the invention
The present invention relates to a kind of pressure energy of natural gas electrification technique as well as with heat pump, comprising:
The normal-temperature natural-gas (pressure 0.9～4.0MPa) that high pressure pipe network comes enters an expansion power generation unit, utilize pressure that expansion power generation unit can be driven to generate electricity, natural gas temperature is down to-35～45 DEG C, preferably-38～-42 DEG C, more preferably from about-40 DEG C, then enter the first air temperature type heater and reclaim cold, then make because ambient temperature is low first air temperature type heater cannot by the cryogenic natural gas re-heat after expanding to more than 0 DEG C time after the heating of heater is to more than 0 DEG C entrance downstream tube net；
Wherein said heater heats by starting heat pump, the circulatory mediator of heat pump is pressurized to 0.5～1.0MPa through heat pump compressor, preferred 0.6MPa～0.7MPa, temperature is 15 DEG C～30 DEG C, entering heater utilizes its heat carried to heat cryogenic natural gas to more than 0 DEG C (such as 0～10 DEG C, such as 5 DEG C), described circulatory mediator self is cooled to 10 DEG C～15 DEG C simultaneously, then enter choke valve reducing pressure by regulating flow to 0.15～0.5MPa, preferred moon 0.2MPa～0.45MPa, and then by the second air temperature type heater, gas phase is become completely by heated for the gas-liquid two-phase after throttling, re-heat is to-15 DEG C～5 DEG C, preferably-10～2 DEG C, it is then return to the entrance of heat pump compressor, complete a circulation.
Natural gas high pressure pipe network described here generally refers to the natural gas under pressure 0.9～4.0MPa, room temperature.
The circulatory mediator of heat pump adopts freon, but is not limited to freon, for instance can also is that other halogen-containing C1-C3 hydro carbons.
The electricity that expansion power generation unit sends is except using for natural gas pressure regulating door station self, and unnecessary electric energy carries out online process.
Another aspect of the present invention relates to the pressure energy of natural gas TRT with heat pump, and this device includes: expansion power generation unit, the first air temperature type heater, the second air temperature type heater, heater, choke valve, heat pump compressor；
It is connected to the entrance of expansion power generation unit through pipeline from the normal-temperature natural-gas of high pressure pipe network, the then outlet of self-expanding generating set is connected to the entrance of the first air temperature type heater, the outlet of the first air temperature type heater connects the gas inlet passage of a heater, and the gas exit passageway of heater is connected to downstream pipe network by pipeline；
The outlet of heat pump compressor connects the entrance of circulatory mediator passage of heater, and the outlet of the circulatory mediator passage of heater connects a choke valve, and after be connected to the entrance of heat pump compressor through the second air temperature type heater.
Further, expansion power generation unit mainly includes main frame, lubricating oil system and control and grid-connected system three part.
Further, expansion power generation device and heat pump are highly integrateable in a sled.
The circulatory mediator of heat pump assembly adopts freon, but is not limited to freon.
General 0.01～0.38 degree of every cubic metre of high pressure normal-temperature natural-gas generated energy, according to selected electromotor producer and type, generator efficiency can increase.
Advantages of the present invention:
1, employing heat pump cycle provides heat, replaces hot water heating, eliminates a hot-water boiler, reduces equipment investment, and eliminates the fuel gas that hot-water boiler consumes, and reduces the environmental pollution that boiler oil burning brings.
2. adopting heat pump techniques, device can be made to reach highly integrated, expansion power generation device and heat pump are all highly integrateable in a sled；And adopting circulating hot water heating technique, hot-water boiler must be put into outside anti-explosion area.
3, meet the requirement of environmental protection, avoid, while generating, the pollution problem that power plants generating electricity brings.
Accompanying drawing explanation
Fig. 1 is the process chart of the present invention.
Wherein, E-1, the first air temperature type heater E-2, heater E-3, the second air temperature type heater X-1, expansion power generation unit X-2, heat pump compressor V-1, choke valve.
Detailed description of the invention
The present invention relates to a kind of pressure energy of natural gas electrification technique as well as with heat pump, comprising:
The normal-temperature natural-gas (pressure 0.9～4.0MPa) that high pressure pipe network comes enters an expansion power generation unit X-1, utilize pressure that expansion power generation unit X-1 can be driven to generate electricity, temperature is down to about-40 DEG C, then enter the first air temperature type heater E-1 and reclaim cold, be then passed through a heater E-2 and enter downstream pipe network；When ambient temperature is too low, the first air temperature type heater E-1 cannot by expand after cryogenic natural gas re-heat to more than 0 DEG C time, start heat pump, by heater E-2 by cryogenic natural gas heat to more than 0 DEG C, be re-fed into downstream pipe network；
The technological process of the heat pump adopted is: the circulatory mediator of heat pump adopts freon, but is not limited to freon；Freon is pressurized to 0.6MPa～0.7MPa through heat pump compressor X-2, temperature is about 15 DEG C～30 DEG C, entering heater E-2 utilizes its heat carried to heat cryogenic natural gas to more than 0 DEG C, such as 5 DEG C, freon self is cooled to 10 DEG C～15 DEG C simultaneously, then enter choke valve V-1 reducing pressure by regulating flow to 0.2MPa～0.45MPa, and then by the second air temperature type heater E-3, gas phase is become completely by heated for the gas-liquid two-phase after throttling, re-heat is to-15 DEG C～5 DEG C, it is then return to the entrance of heat pump compressor X-2, completes a circulation.
The electricity that expansion power generation unit X-1 sends is except using for natural gas pressure regulating door station self, and unnecessary electric energy carries out online process.
Pressure energy of natural gas TRT with heat pump, this device includes: expansion power generation unit X-1, the first air temperature type heater E-1, the second air temperature type heater E-3, heater E-2, choke valve V-1, heat pump compressor X-2, expansion power generation unit X-1 mainly includes main frame, lubricating oil system and control and grid-connected system three part；
It is connected to the entrance of expansion power generation unit X-1 through pipeline from the normal-temperature natural-gas of high pressure pipe network, the then outlet of self-expanding generating set X-1 is connected to the entrance of the first air temperature type heater E-1, the outlet of the first air temperature type heater E-1 connects the gas inlet passage of a heater E-2, and the gas exit passageway of heater E-2 is connected to downstream pipe network by pipeline；
The outlet of heat pump compressor X-2 connects the entrance of circulatory mediator passage of heater E-2, and the outlet of the circulatory mediator passage of heater E-2 connects a choke valve V-1, and after be connected to the entrance of heat pump compressor X-2 through the second air temperature type heater E-3.Expansion power generation device and heat pump can be highly integrateable in a sled.
The circulatory mediator of heat pump assembly adopts freon, but is not limited to freon.
Claims (5)
1. the pressure energy of natural gas electrification technique as well as with heat pump, comprising:
The normal-temperature natural-gas that high pressure pipe network comes enters an expansion power generation unit, utilize pressure that expansion power generation unit can be driven to generate electricity, natural gas temperature is down to-35～45 DEG C, preferably-38～-42 DEG C, more preferably from about-40 DEG C, then enter the first air temperature type heater and reclaim cold, then make because ambient temperature is low first air temperature type heater cannot by the cryogenic natural gas re-heat after expanding to more than 0 DEG C time after the heating of heater is to more than 0 DEG C entrance downstream tube net；
Wherein said heater heats by starting heat pump, the circulatory mediator of heat pump is pressurized to 0.5～1.0MPa through heat pump compressor, preferred 0.6MPa～0.7MPa, temperature is 15 DEG C～30 DEG C, entering heater utilizes its heat carried to heat cryogenic natural gas to more than 0 DEG C (such as 0～10 DEG C, such as 5 DEG C), described circulatory mediator self is cooled to 10 DEG C～15 DEG C simultaneously, then enter choke valve reducing pressure by regulating flow to 0.15～0.5MPa, preferably about 0.2MPa～0.45MPa, and then by the second air temperature type heater, gas phase is become completely by heated for the gas-liquid two-phase after throttling, re-heat is to-15 DEG C～5 DEG C, preferably-10～2 DEG C, it is then return to the entrance of heat pump compressor, complete a circulation.
2. technique according to claim 1, wherein the circulatory mediator of heat pump adopts freon.
3. the pressure energy of natural gas TRT with heat pump, this device includes: expansion power generation unit, the first air temperature type heater, the second air temperature type heater, heater, choke valve, heat pump compressor；
It is connected to the entrance of expansion power generation unit through pipeline from the normal-temperature natural-gas of high pressure pipe network, the then outlet of self-expanding generating set is connected to the entrance of the first air temperature type heater, the outlet of the first air temperature type heater connects the gas inlet passage of a heater, and the gas exit passageway of heater is connected to downstream pipe network by pipeline；
The outlet of heat pump compressor connects the entrance of circulatory mediator passage of heater, and the outlet of the circulatory mediator passage of heater connects a choke valve, and after be connected to the entrance of heat pump compressor through the second air temperature type heater.
4. device according to claim 3, wherein, expansion power generation unit includes main frame, lubricating oil system and control and grid-connected system three part.
5. the device according to claim 3 or 4, wherein, expansion power generation device and heat pump are highly integrateable in a sled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610229985.4A CN105736082A (en) | 2016-04-14 | 2016-04-14 | Natural gas pressure energy power generation technology and device with heat pump |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610229985.4A CN105736082A (en) | 2016-04-14 | 2016-04-14 | Natural gas pressure energy power generation technology and device with heat pump |
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| CN105736082A true CN105736082A (en) | 2016-07-06 |
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| CN201610229985.4A Pending CN105736082A (en) | 2016-04-14 | 2016-04-14 | Natural gas pressure energy power generation technology and device with heat pump |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5205133A (en) * | 1992-01-16 | 1993-04-27 | R & D Technologies, Inc. | High efficiency pool heating system |
| JP2010065917A (en) * | 2008-09-10 | 2010-03-25 | Ebara Refrigeration Equipment & Systems Co Ltd | Absorption heat pump |
| KR20110039714A (en) * | 2009-10-12 | 2011-04-20 | 주식회사 코와 | Lng vaporization process system using heat pump |
| CN103867894A (en) * | 2014-03-29 | 2014-06-18 | 辽宁石油化工大学 | Method and device for generating power and capturing CO2 through cold energy of liquefied natural gas |
| CN104088605A (en) * | 2014-07-01 | 2014-10-08 | 北京工业大学 | Natural gas well mouth heating throttling system based on pressure-energy electricity generation and heat-pump heating |
| CN105114131A (en) * | 2015-08-31 | 2015-12-02 | 北京市燃气集团有限责任公司 | Integrated device capable of achieving expansion power generation and compression refrigeration through natural gas pressure |
-
2016
- 2016-04-14 CN CN201610229985.4A patent/CN105736082A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5205133A (en) * | 1992-01-16 | 1993-04-27 | R & D Technologies, Inc. | High efficiency pool heating system |
| JP2010065917A (en) * | 2008-09-10 | 2010-03-25 | Ebara Refrigeration Equipment & Systems Co Ltd | Absorption heat pump |
| KR20110039714A (en) * | 2009-10-12 | 2011-04-20 | 주식회사 코와 | Lng vaporization process system using heat pump |
| CN103867894A (en) * | 2014-03-29 | 2014-06-18 | 辽宁石油化工大学 | Method and device for generating power and capturing CO2 through cold energy of liquefied natural gas |
| CN104088605A (en) * | 2014-07-01 | 2014-10-08 | 北京工业大学 | Natural gas well mouth heating throttling system based on pressure-energy electricity generation and heat-pump heating |
| CN105114131A (en) * | 2015-08-31 | 2015-12-02 | 北京市燃气集团有限责任公司 | Integrated device capable of achieving expansion power generation and compression refrigeration through natural gas pressure |
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Application publication date: 20160706 |