CN110966060A - Pipeline pressure energy and natural gas distributed energy coupling system - Google Patents
Pipeline pressure energy and natural gas distributed energy coupling system Download PDFInfo
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- CN110966060A CN110966060A CN201911149209.3A CN201911149209A CN110966060A CN 110966060 A CN110966060 A CN 110966060A CN 201911149209 A CN201911149209 A CN 201911149209A CN 110966060 A CN110966060 A CN 110966060A
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- 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
- F01K27/00—Plants for converting heat or fluid energy into mechanical energy, not otherwise provided for
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- 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
- F01K13/00—General layout or general methods of operation of complete plants
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- 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
- F01K17/00—Using steam or condensate extracted or exhausted from steam engine plant
- F01K17/02—Using steam or condensate extracted or exhausted from steam engine plant for heating purposes, e.g. industrial, domestic
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- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/14—Combined heat and power generation [CHP]
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Abstract
The invention discloses a pipeline pressure energy and natural gas distributed energy coupling system, which comprises: set gradually pressure regulating between high-pressure pipe network and the middling pressure pipe network and pass through and first heat exchanger, be connected with the combined cooling heating and power unit on the first heat exchanger, the heat source that the combined cooling and power unit provided flows in first heat exchanger carries out the heat exchange with the natural gas that flows in first heat exchanger behind the turbine through the pressure regulating, in order to improve the temperature of natural gas. The pressure energy generated by natural gas flowing to the medium-pressure pipe network from the high-pressure pipe network is recovered through the pressure regulating turbine, and meanwhile, the heat is supplemented to the natural gas passing through the pressure regulating turbine through the combined cooling heating and power unit, so that the recovery of the pressure energy of the natural gas is realized on one hand, the recovery of waste heat generated by the combined cooling heating and power unit is also realized on the other hand, and the energy utilization rate is improved.
Description
Technical Field
The invention relates to the technical field of natural gas, in particular to a pipeline pressure energy and natural gas distributed energy coupling system.
Background
In reality, the design pressure of a town gas pipe network is generally 1.6-4.0Mpa, and the pressure can be reduced in the process of conveying the natural gas valve station to a downstream gas transmission and distribution pipe network, high-pressure natural gas can have a large amount of pressure energy loss in the pressure reduction process, and most of energy can be wasted.
A natural gas distributed combined cooling heating and power system is a poly-generation total energy system which is established on the concept of cascade utilization of energy and integrates the processes of refrigeration, heat supply and power generation, and belongs to distributed energy. The combined cooling heating and power system has extremely high energy utilization rate which can reach about 70 percent, and the distributed energy in China has a larger gap compared with developed countries such as Europe and America at the present stage, but due to the superiority of the distributed energy system of the natural gas station, the natural gas resources in China and relevant guide policies adopted by the government and other factors, the distributed combined cooling heating and power system of the natural gas has great development prospect in China.
At the present stage, the heat required by the heat replacement of the natural valve station is mostly provided by a boiler, so that the energy loss is overlarge, and the waste heat in the natural valve station is completely wasted, thereby causing the energy waste.
Disclosure of Invention
The invention aims to solve the technical problem of providing a pipeline pressure energy and natural gas distributed energy coupling system aiming at the defects of the prior art.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
a pipeline pressure energy and natural gas distributed energy coupling system, the system comprising: set gradually pressure regulating between high-pressure pipe network and the middling pressure pipe network and pass through and first heat exchanger, be connected with the combined cooling heating and power unit on the first heat exchanger, the heat source that the combined cooling and power unit provided flows in first heat exchanger carries out the heat exchange with the natural gas that flows in first heat exchanger behind the turbine through the pressure regulating, in order to improve the temperature of natural gas.
Pipeline pressure energy and natural gas distributed energy coupled system, wherein, be connected with the generator on the pressure regulating turbine, the generator is based on pressure regulating turbine retrieves the pressure energy electricity generation, wherein, pressure energy is that the natural gas step-down that high-pressure pipe network flow direction middling pressure pipe network produced.
The pipeline pressure energy and natural gas distributed energy coupling system comprises a combined cooling heating and power supply unit, a heat exchange unit and a heat exchanger, wherein the combined cooling heating and power supply unit comprises a gas turbine and the heat exchange unit; and the flue gas generated by the gas turbine flows into the first heat exchanger after passing through the heat exchange unit.
The pipeline pressure energy and natural gas distributed energy coupling system comprises a heat exchange unit, a heat exchange main path and a heat exchange branch path, wherein the heat exchange unit comprises a second heat exchanger, and the heat exchange main path and the heat exchange branch path are connected in parallel between a heat exchange medium outlet and a heat exchange medium inlet of the second heat exchanger.
The pipeline pressure energy and natural gas distributed energy coupling system comprises a heat exchange main path and a heat exchanger, wherein the heat exchange main path comprises an ammonia water turbine, a water cooler and a pressure pump, and the ammonia water turbine, the water cooler and the pressure pump are sequentially connected between a medium outlet of a second heat exchanger and a medium inlet of the second heat exchanger.
The pipeline pressure energy and natural gas distributed energy coupling system is characterized in that the heat exchange branch comprises a lithium bromide heat exchange unit, and a heat exchange medium in the second heat exchanger flows back to the second heat exchanger after passing through the lithium bromide heat exchange unit.
The pipeline pressure energy and natural gas distributed energy coupling system is characterized in that a heat exchange medium of the second heat exchanger is ammonia water.
The pipeline pressure energy and natural gas distributed energy coupling system is characterized in that the communication state of the heat exchange main circuit is opposite to that of the heat exchange branch circuit.
Has the advantages that: compared with the prior art, the invention provides a pipeline pressure energy and natural gas distributed energy coupling system, which comprises: set gradually pressure regulating between high-pressure pipe network and the middling pressure pipe network and pass through and first heat exchanger, be connected with the combined cooling heating and power unit on the first heat exchanger, the heat source that the combined cooling and power unit provided flows in first heat exchanger carries out the heat exchange with the natural gas that flows in first heat exchanger behind the turbine through the pressure regulating, in order to improve the temperature of natural gas. The pressure energy generated by natural gas flowing to the medium-pressure pipe network from the high-pressure pipe network is recovered through the pressure regulating turbine, and meanwhile, the heat is supplemented to the natural gas passing through the pressure regulating turbine through the combined cooling heating and power unit, so that the recovery of the pressure energy of the natural gas is realized on one hand, the recovery of waste heat generated by the combined cooling heating and power unit is also realized on the other hand, and the energy utilization rate is improved.
Drawings
Fig. 1 is a schematic structural diagram of a pipeline pressure energy and natural gas distributed energy coupling system provided by the invention.
Detailed Description
The invention provides a system for coupling pipeline pressure energy and natural gas distributed energy, and in order to make the purpose, technical scheme and effect of the invention clearer and clearer, the invention is further described in detail below by referring to the attached drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
It should also be noted that the same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there is an orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. based on the orientation or positional relationship shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, but it is not intended to indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and are not to be construed as limiting the present patent, and the specific meaning of the terms may be understood by those skilled in the art according to specific circumstances.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
The invention will be further explained by the description of the embodiments with reference to the drawings.
The embodiment provides a system for coupling pipeline pressure energy and natural gas distributed energy, as shown in fig. 1, the system includes a high-pressure pipe network 6, a medium-pressure pipe network 10, a pressure regulating turbine 7, a first heat exchanger 9, and a combined cooling, heating and power unit; the combined cooling heating and power unit is connected with the first heat exchanger 9, a natural gas inlet of the first heat exchanger 9 is connected with the pressure regulating turbine 7, a natural gas outlet of the first heat exchanger 9 is connected with the medium-pressure pipe network 10 through a pipeline, and the pressure regulating turbine 7 is connected with the high-pressure pipe network 6. The natural gas that high pressure pipe network 6 flows to medium pressure pipe network 10 flows into first heat exchanger 9 after passing through pressure regulating turbine 7 earlier, and the natural gas that flows into in first heat exchanger 9 and the flue gas that the combined cooling heating and power unit flowed into the heat exchanger carry out the heat transfer to absorb the heat in the flue gas and heat the natural gas, the natural gas after the heating flows into medium pressure pipe network 10. In this embodiment, the pressure energy of the high-pressure pipe network 6 flowing to the medium-pressure pipe network 10 is recovered through the pressure regulating turbine 7, and then the flue gas generated by the combined cooling heating and power unit supplements heat for the natural gas passing through the pressure regulating turbine 7, so as to compensate for the temperature loss in the pressure reduction process, and ensure the temperature of the natural gas flowing to the medium-pressure pipe network 10. Meanwhile, the heat in the flue gas generated by the combined cooling heating and power unit is recovered, and the energy utilization rate of the combined cooling heating and power unit is improved.
In addition, the pressure regulating turbine 7 is connected with a generator 8, and the generator 8 generates electricity based on the pressure energy recovered by the pressure regulating turbine 7, wherein the pressure energy is formed by the pressure difference between the natural gas in the high-pressure pipe network 6 and the natural gas in the medium-pressure pipe network 10. Therefore, the pressure energy can be recovered through the generator 8, the energy waste of natural gas in the process that the high-pressure pipe network 6 flows to the medium-pressure pipe network 10 is avoided, and the energy utilization rate is improved.
Further, because the natural gas in the high-pressure pipe network 6 can produce the heat loss at the step-down in-process to cause the natural gas temperature lower, so that the natural gas temperature that flows into the middling pressure pipe network 10 is low, and influences the normal use of middling pressure pipe network 10. Therefore, the natural gas passing through the pressure regulating turbine 7 flows into the first heat exchanger 9 before flowing into the medium-pressure pipe network 10, is heated by the first heat exchanger 9, and then flows into the medium-pressure pipe network 10. The first heat exchanger 9 is provided with a natural gas inlet, a natural gas outlet, a flue gas inlet and a flue gas outlet; the natural gas inlet is connected with the pressure regulating turbine 7, the natural gas outlet is connected with the medium-pressure pipe network 10, the flue gas inlet is connected with the combined cooling heating and power unit, and the flue gas outlet is used for discharging flue gas flowing into the first heat exchanger 9. In addition, the natural gas that flows into in first heat exchanger 9 carries out the heat exchange with the flue gas that flows into first heat exchanger 9, and the temperature of flue gas is higher than the temperature of natural gas to the natural gas lies in the flue gas and carries out the heat exchange in-process, and the natural gas absorbs the heat intensification in the flue gas, and the cooling of flue gas release heat has improved the temperature of the day steam that flows to medium voltage pipe network 10 on the one hand like this, and the other party has also retrieved the waste heat in the flue gas, has improved energy utilization.
Further, as shown in fig. 1, the combined cooling, heating and power supply unit includes a gas turbine 1 and a heat exchange unit, the gas turbine 1 is connected with the heat exchange unit, and the heat exchange unit is connected with the first heat exchanger 9; air and natural gas flow into the gas turbine 1 and gas produces the flue gas in the gas turbine 1, and the flue gas passes through the turbine production electric energy in the gas turbine 1 in order to realize generating electricity, and the high temperature flue gas through the turbine in the gas turbine 1 flows into heat exchange unit to through heat exchange unit produces cold energy or heat energy, and the flue gas that passes through heat exchange unit flows into first heat exchanger 9 to carry out the heat exchange with the day hot-gas that flows through first heat exchanger 9, in order to release the heat.
With reference to fig. 1, the heat exchange unit includes a second heat exchanger 2, the second heat exchanger 2 includes a medium outlet and a medium inlet, a main heat exchange path and a branch heat exchange path are disposed between the medium outlet and the medium inlet, the main heat exchange path is connected in parallel with the branch heat exchange path, and the main heat exchange path and the branch heat exchange path are in opposite communication states. That is, when the main heat exchange path is in a connected state, the heat exchange branches are in a disconnected state, and when the main heat exchange path is in a disconnected state, the heat exchange branches are in a connected state. Therefore, the pipeline pressure energy and the natural gas distributed energy coupling system are in an operating state, the heat exchange main circuit and the heat exchange branch circuit are only communicated with one other, for example, the heat exchange main circuit is communicated with the heat exchange branch circuit, or the heat exchange branch circuit is communicated with the heat exchange main circuit. For example, when the pipeline pressure energy and the natural gas distributed energy coupling system work in winter, the heat exchange main path is communicated and heats through the heat exchange main path; when the pipeline pressure energy and natural gas distributed energy coupling system works in summer, the heat exchange branch is communicated, and refrigeration is carried out through the heat exchange branch, so that the refrigeration and heating functions of the pipeline pressure energy and natural gas distributed energy coupling system are realized.
Further, as shown in fig. 1, the main heat exchange path includes an ammonia water turbine 3, a water cooler 4 and a booster pump 5; the ammonia water turbine 3 is connected with a medium outlet of the second heat exchanger 2, the water cooler 4 is connected with the ammonia water turbine 3, the booster pump 5 is connected with the water cooler 4, and the booster pump 5 is connected with a medium inlet of the second heat exchanger 2. The heat exchange medium in the second heat exchanger 2 flows into the ammonia water turbine 3 through the medium outlet, the generated electric energy of the ammonia water turbine 3 is cooled and depressurized, the cooled and depressurized heat exchange medium flows into the water cooler 4, and the heat exchange medium passing through the water cooler 4 is pressurized by the pressurizing pump 5 and then flows back to the second heat exchanger 2 to form a circulation loop of the heat exchange medium. The heat exchange medium flowing into the second heat exchanger 2 through the booster pump 5 exchanges heat with the flue gas flowing through the second heat exchanger 2, absorbs the residual heat in the flue gas to raise the temperature, and the heat exchange medium after being raised in temperature flows into the ammonia water turbine 3 again. In addition, the heat exchange medium through ammonia water turbine 3 flows into water cooler 4 to the water that flows into in water cooler 4 carries out the heat transfer, in order to heat water, has realized the heating function. In addition, in a possible implementation manner of this embodiment, the heat exchange medium of the second heat exchanger 2 is ammonia water.
Further, as shown in fig. 1, the heat exchange branch includes that the heat exchange branch includes a lithium bromide heat exchange unit, and the heat exchange medium in the second heat exchanger 2 flows back to the second heat exchanger 2 after passing through the lithium bromide heat exchange unit. And after heat exchange is carried out between the heat exchange medium in the second heat exchanger 2 and the flue gas flowing through the second heat exchanger 2, the heat exchange medium flows into the lithium bromide heat exchange unit, so that the lithium bromide heat exchange unit can refrigerate based on heat carried by the heat exchange medium flowing into the second heat exchanger 2, and the cold requirement in a station assembled with the pipeline pressure energy and natural gas distributed energy coupling system is met. In addition, in the process that the heat exchange medium flows through the lithium bromide heat exchange unit, the pressure of the heat exchange medium is unchanged, so that the heat exchange medium flowing through the lithium bromide heat exchange unit directly flows back into the second heat exchanger 2.
To sum up, this embodiment provides a pipeline pressure energy and natural gas distributed energy coupled system, the system includes: set gradually pressure regulating turbine 7 and first heat exchanger 9 between high-pressure pipe network 6 and medium-pressure pipe network 10, be connected with the combined cooling heating and power unit on the first heat exchanger 9, the heat source that the combined cooling and power unit provided flows in first heat exchanger 9 exchanges with the natural gas that flows into first heat exchanger 9 behind pressure regulating turbine 7, in order to improve the temperature of natural gas. According to the invention, the pressure energy generated by the natural gas flowing from the high-pressure pipe network 6 to the medium-pressure pipe network 10 is recovered through the pressure regulating turbine 7, and meanwhile, the heat is supplemented to the natural gas passing through the pressure regulating turbine 7 through the combined cooling heating and power supply unit, so that on one hand, the recovery of the natural gas pressure energy is realized, on the other hand, the recovery of the waste heat generated by the combined cooling heating and power supply unit is also realized, and the energy utilization rate is improved.
In addition, in order to further explain the coupling system of pipeline pressure energy and natural gas distributed energy provided by the embodiment, the following description is made in conjunction with two specific embodiments.
Example one
In this embodiment, the pipeline pressure energy and natural gas distributed energy coupling system is used in winter, and at this time, the heat exchange main path is in a connected state, and the heat exchange branch is not in a connected state. The pressure of the high-pressure pipe network 6 is 4.0Mpa, and the pressure of the medium-pressure pipe network 10 is 1.6 Mpa. The working process of the pipeline pressure energy and natural gas distributed energy coupling system can be as follows:
the natural gas in the high-pressure pipe network 6 finishes the recovery of pressure energy through the pressure regulating turbine 7, the generator 8 generates electricity to generate electric energy P1, the temperature of the natural gas passing through the pressure regulating turbine 7 is reduced from about 20 ℃ to about-30 ℃, the cooled natural gas flows into the first heat exchanger 9, the heat of the flue gas flowing into the first heat exchanger 9 by the combined cooling heating and power supply unit is absorbed to heat, and the heated natural gas flows into the medium-pressure pipe network 10.
The working process of the combined cooling, heating and power supply unit is as follows: air and natural gas are introduced into the gas turbine 1 through the vent hole of the micro gas turbine 1, and are combusted under the pressure of about 15atm to generate flue gas with the temperature of about 1000 ℃, the flue gas generates electric energy P2 through a turbine in the gas turbine 1, meanwhile, the temperature of high-temperature flue gas is reduced by about 500 ℃, and the pressure is reduced to about 1 bar. The cooled flue gas is introduced into the second heat exchanger 2, meanwhile, gaseous ammonia water at about 100bar is introduced into the second heat exchanger 2, the ammonia water and the flue gas exchange heat in the second heat exchanger 2, the temperature of the flue gas is reduced to about 170 ℃ after heat exchange, and the cooled flue gas flows into the first heat exchanger 9 to exchange heat with the natural gas flowing into the first heat exchanger 9.
In addition, the ammonia water in the second heat exchanger 2 is continuously introduced into the ammonia water turbine 3 to generate electric energy P3, the temperature is reduced to about 100 ℃, the pressure is reduced to about 3bar, the ammonia water after temperature reduction and pressure reduction is introduced into the 10 water cooler 4 to exchange heat with the water flowing through the water cooler 4, and the temperature of the ammonia water after heat exchange is reduced to about 30 ℃; and the ammonia water cooled again is introduced into the booster pump 5 for boosting, and is introduced into the second heat exchanger 2 again after being boosted to about 110bar so as to form a circulation loop of the second heat exchanger 2, the ammonia water turbine 3, the water cooler 4, the booster pump 5 and the second heat exchanger 2. Meanwhile, the flue gas passing through the second heat exchanger 2 can be introduced into a second heat exchanger to provide heat for natural gas heat exchange.
Example one
In this embodiment, the pipeline pressure energy and natural gas distributed energy coupling system is used in summer, and at this time, the heat exchange main circuit is in a non-connected state, and the heat exchange branch circuit is in a connected state. The pressure of the high-pressure pipe network 6 is 4.0Mpa, and the pressure of the medium-pressure pipe network 10 is 1.6 Mpa. The working process of the pipeline pressure energy and natural gas distributed energy coupling system can be as follows:
the natural gas in the high-pressure pipe network 6 finishes the recovery of pressure energy through the pressure regulating turbine 7, the generator 8 generates electricity to generate electric energy P1, the temperature of the natural gas passing through the pressure regulating turbine 7 is reduced from about 20 ℃ to about-30 ℃, the cooled natural gas flows into the first heat exchanger 9, the heat of the flue gas flowing into the first heat exchanger 9 by the combined cooling heating and power supply unit is absorbed to heat, and the heated natural gas flows into the medium-pressure pipe network 10.
The working process of the combined cooling, heating and power supply unit is as follows: air and natural gas are introduced into the gas turbine 1 through the vent hole of the micro gas turbine 1, and are combusted under the pressure of about 15atm to generate flue gas with the temperature of about 1000 ℃, the flue gas generates electric energy P2 through a turbine in the gas turbine 1, meanwhile, the temperature of high-temperature flue gas is reduced by about 500 ℃, and the pressure is reduced to about 1 bar. The cooled flue gas is introduced into the second heat exchanger 2, meanwhile, gaseous ammonia water at about 100bar is introduced into the second heat exchanger 2, the ammonia water and the flue gas exchange heat in the second heat exchanger 2, the temperature of the flue gas is reduced to about 170 ℃ after heat exchange, and the cooled flue gas flows into the first heat exchanger 9 to exchange heat with the natural gas flowing into the first heat exchanger 9.
In addition, the aqueous ammonia in the second heat exchanger 2 continues to let in lithium bromide heat transfer unit, lithium bromide heat transfer unit reduces the aqueous ammonia temperature to about 10 ℃, and lithium bromide heat transfer unit utilizes the cold volume demand in the lithium bromide supply station, and the pressure of the aqueous ammonia after the cooling is unchangeable to the aqueous ammonia directly is passed back to second heat exchanger 2 after the cooling, forms bypass circulation circuit. Meanwhile, the flue gas passing through the second heat exchanger 2 can be introduced into a second heat exchanger to provide heat for natural gas heat exchange.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (8)
1. A system for coupling pipeline pressure energy with natural gas distributed energy, the system comprising: set gradually pressure regulating between high-pressure pipe network and the middling pressure pipe network and pass through and first heat exchanger, be connected with the combined cooling heating and power unit on the first heat exchanger, the heat source that the combined cooling and power unit provided flows in first heat exchanger carries out the heat exchange with the natural gas that flows in first heat exchanger behind the turbine through the pressure regulating, in order to improve the temperature of natural gas.
2. The system of claim 1, wherein the pressure regulating turbine is connected to a generator, the generator is configured to generate electricity based on pressure energy recovered by the pressure regulating turbine, and the pressure energy is generated by depressurizing natural gas flowing from the high-pressure pipe network to the medium-pressure pipe network.
3. The system for coupling pipeline pressure energy and natural gas distributed energy according to claim 1, wherein the combined cooling, heating and power supply unit comprises a gas turbine and a heat exchange unit, the gas turbine is connected with the heat exchange unit, and the heat exchange unit is connected with the first heat exchanger; and the flue gas generated by the gas turbine flows into the first heat exchanger after passing through the heat exchange unit.
4. The system according to claim 3, wherein the heat exchange unit comprises a second heat exchanger, and a main heat exchange path and a branch heat exchange path connected in parallel between the outlet of the heat exchange medium and the inlet of the heat exchange medium of the second heat exchanger.
5. The system for coupling pipeline pressure energy and natural gas distributed energy according to claim 4, wherein the main heat exchange path comprises an ammonia water turbine, a water cooler and a booster pump, and the ammonia water turbine, the water cooler and the booster pump are sequentially connected between the medium outlet of the second heat exchanger and the medium inlet of the second heat exchanger.
6. The system for coupling pipeline pressure energy and natural gas distributed energy according to claim 4, wherein the heat exchange branch comprises a lithium bromide heat exchange unit, and a heat exchange medium in the second heat exchanger flows back to the second heat exchanger after passing through the lithium bromide heat exchange unit.
7. The system for coupling pipeline pressure energy and natural gas distributed energy according to claim 4, wherein the heat exchange medium of the second heat exchanger is ammonia water.
8. The system according to claim 4, wherein the communication state of the main heat exchange path is opposite to the communication state of the branch heat exchange paths.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104675521A (en) * | 2015-02-26 | 2015-06-03 | 天津大学 | Novel gas-steam combined cycle cooling, heating and power generation system |
| US20170082060A1 (en) * | 2015-09-23 | 2017-03-23 | Pasteurization Technology Group, Inc. | Combined heat and power system with electrical and thermal energy storage |
| CN108316981A (en) * | 2018-03-14 | 2018-07-24 | 中节能工程技术研究院有限公司 | Natural gas overbottom pressure and gas turbine coupling combined supplying system, pipe network system and method |
| CN108317011A (en) * | 2018-01-23 | 2018-07-24 | 深圳市燃气集团股份有限公司 | A kind of pressure energy of natural gas recovery system of integrated gas turbine |
| CN109812307A (en) * | 2018-12-14 | 2019-05-28 | 浙江理工大学 | Pressure energy of natural gas recyclable device and method |
-
2019
- 2019-11-21 CN CN201911149209.3A patent/CN110966060A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104675521A (en) * | 2015-02-26 | 2015-06-03 | 天津大学 | Novel gas-steam combined cycle cooling, heating and power generation system |
| US20170082060A1 (en) * | 2015-09-23 | 2017-03-23 | Pasteurization Technology Group, Inc. | Combined heat and power system with electrical and thermal energy storage |
| CN108317011A (en) * | 2018-01-23 | 2018-07-24 | 深圳市燃气集团股份有限公司 | A kind of pressure energy of natural gas recovery system of integrated gas turbine |
| CN108316981A (en) * | 2018-03-14 | 2018-07-24 | 中节能工程技术研究院有限公司 | Natural gas overbottom pressure and gas turbine coupling combined supplying system, pipe network system and method |
| CN109812307A (en) * | 2018-12-14 | 2019-05-28 | 浙江理工大学 | Pressure energy of natural gas recyclable device and method |
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Application publication date: 20200407 |