CN111219596B - Electric cooling production recycling system of hydrogenation station and natural gas pressure regulating station - Google Patents
Electric cooling production recycling system of hydrogenation station and natural gas pressure regulating station Download PDFInfo
- Publication number
- CN111219596B CN111219596B CN202010139963.5A CN202010139963A CN111219596B CN 111219596 B CN111219596 B CN 111219596B CN 202010139963 A CN202010139963 A CN 202010139963A CN 111219596 B CN111219596 B CN 111219596B
- Authority
- CN
- China
- Prior art keywords
- energy
- natural gas
- station
- pressure regulating
- power
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 title claims abstract description 198
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 112
- 239000003345 natural gas Substances 0.000 title claims abstract description 99
- 238000001816 cooling Methods 0.000 title claims abstract description 82
- 230000001105 regulatory effect Effects 0.000 title claims abstract description 76
- 238000005984 hydrogenation reaction Methods 0.000 title claims abstract description 43
- 238000004064 recycling Methods 0.000 title claims abstract description 10
- 238000010248 power generation Methods 0.000 claims abstract description 51
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 46
- 239000001257 hydrogen Substances 0.000 claims abstract description 46
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 43
- 238000009826 distribution Methods 0.000 claims abstract description 17
- 238000003860 storage Methods 0.000 claims abstract description 5
- 239000003507 refrigerant Substances 0.000 claims description 45
- 239000002028 Biomass Substances 0.000 claims description 13
- 238000000034 method Methods 0.000 claims description 9
- 238000005057 refrigeration Methods 0.000 claims description 8
- 239000013589 supplement Substances 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 3
- 230000001360 synchronised effect Effects 0.000 claims description 3
- 239000002737 fuel gas Substances 0.000 claims description 2
- 230000008901 benefit Effects 0.000 description 13
- 230000008569 process Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 6
- 239000007789 gas Substances 0.000 description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 6
- 230000000295 complement effect Effects 0.000 description 5
- 239000002826 coolant Substances 0.000 description 5
- 230000005611 electricity Effects 0.000 description 5
- 238000011084 recovery Methods 0.000 description 5
- 238000005265 energy consumption Methods 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 4
- 239000010687 lubricating oil Substances 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- 238000004378 air conditioning Methods 0.000 description 3
- 230000033228 biological regulation Effects 0.000 description 3
- 230000006835 compression Effects 0.000 description 3
- 238000007906 compression Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000000087 stabilizing effect Effects 0.000 description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005429 filling process Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 238000007726 management method Methods 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000006855 networking Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000013439 planning Methods 0.000 description 1
- 230000007363 regulatory process Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000012384 transportation and delivery Methods 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C5/00—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures
- F17C5/06—Methods or apparatus for filling containers with liquefied, solidified, or compressed gases under pressures for filling with compressed gases
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/01—Arrangements for supervising or controlling working operations for controlling, signalling, or supervising the conveyance of a product
-
- 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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/32—Hydrogen storage
-
- 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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/34—Hydrogen distribution
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Separation By Low-Temperature Treatments (AREA)
Abstract
The patent discloses an electric cooling production recycling system of a hydrogenation station and a natural gas pressure regulating station, which comprises an energy system of the hydrogenation station and an energy system of the natural gas pressure regulating station; the hydrogenation station energy system comprises a hydrogen input device, a compressor, a heat exchanger A, a hydrogen storage tank, a hydrogenation machine, a heat exchanger B and an automobile-mounted bottle which are connected in sequence; the natural gas pressure regulating station energy system comprises a natural gas input pipeline, a pressure regulating loop and a natural gas output pipeline which are connected in sequence; an electric cooling production unit is increased in the natural gas pressure regulating station; the electric cooling production unit comprises a pressure energy power generation device and a cooling energy production device, and the power generated by the pressure energy power generation device is connected with the power distribution device; the cold energy production device is connected with the cold energy allocation center. The system for producing, recycling and comprehensively utilizing the energy can integrate various energy demands of the hydrogenation station and the natural gas pressure regulating station into a whole and realize reciprocal complementation.
Description
Technical Field
The patent relates to the technical field of energy production, recovery, conversion and utilization, in particular to an electric cooling production recovery and utilization system of a hydrogenation station and a natural gas pressure regulating station.
Background
Hydrogen energy has the advantage of clean and environment-friendly, and is one of the important ways to solve the energy supply and environmental problems nowadays. In various places, hydrogen fuel cell automobiles are developed in great force, a large number of hydrogen adding stations are built, and a considerable part of the hydrogen adding stations are adjacent to the natural gas pressure regulating stations.
On the one hand, as shown in fig. 1, a hydrogen filling station (hydrogen adding station) needs a compressor to pressurize hydrogen from medium and low pressure (5.0 MPa) to high pressure (45 MPa or even 90 MPa), and then stores the hydrogen in a hydrogen storage tank. When the gas is needed, the gas is filled into a 35MPa or 70MPa automobile bottle through a hydrogenation machine.
A large amount of power is consumed during pressurization. In addition, the temperature of the hydrogen gas increases during pressurization, and the compressor liner and the lubricating oil system also generate a large amount of heat energy, which needs to be cooled to remove the heat energy.
In addition, in the process of filling hydrogen into an automobile-mounted bottle through a hydrogenation machine, the hydrogen temperature is rapidly increased due to high flow speed and hydrogen characteristics, and reliable cooling measures are required to reduce the hydrogen temperature within a specified range so as to ensure safety and storage capacity.
Obviously, a refrigeration and cold supply system with a certain scale, such as a circulating cooling water system, a refrigeration system, an air cooling system and the like, needs to be built in the hydrogenation station. The investment increase is necessary, and the operation process also needs to consume electric power or other energy sources, thereby increasing the operation cost. The data shows that the power requirement of a 1000 kg/day hydrogen station for refrigeration and cooling is about 1000 kw. In addition, the self-power consumption of the hydrogen station compressor, the station air conditioning system, the lighting system and the like is 1080kw & lth.
In summary, hydrogen stations have a significant power and cooling requirements.
On the other hand, as shown in fig. 2, the natural gas pressure regulating station is used for regulating the pressure of the high-pressure natural gas to the middle and low pressures. Conventionally, conventional natural gas pressure regulating stations are provided with one or more pressure regulating circuits, each of which comprises a heat exchanger and a pressure regulator, through which high-pressure natural gas is reduced in pressure and stabilized at the pressure level of the next highest pressure or medium pressure required by the user.
Because natural gas absorbs heat in the depressurization process, the natural gas temperature in the pipeline drops sharply. Empirical data shows that the temperature of the natural gas in the pipeline can be reduced by about 5 ℃ every time the pressure of the natural gas is reduced by 1.0MPa, and the pipeline and related equipment are often frozen and even ice blockage accidents occur.
In order to cope with the situation, potential safety hazards and adverse effects on pipelines and equipment are avoided, heat supply devices such as gas hot water boilers, electric heaters and the like are generally arranged on stations with large depressurization range, natural gas is heated before pressure regulation by applying a heat source, and the natural gas temperature after depressurization is ensured to meet the standard requirements.
To sum up: a natural gas pressure regulating station has a heat requirement; the pressure difference of self-depressurization constitutes pressure energy, can produce electric power and cold energy.
Because the two stations (the hydrogenation station and the natural gas pressure regulating station) are often separated by only one wall or are close in distance, a set of energy production, recovery and comprehensive utilization system which integrates the two energy systems into a whole is designed according to the principles of reciprocity and reciprocal benefits and complementary advantages by combining different requirements and actual conditions of the two adjacent stations. Through overall optimization and overall planning, an advanced and economic and reasonable process technology route is adopted, so that the win-win goal of respectively taking the demands of two stations, respectively achieving the best results and realizing energy conservation and consumption reduction is achieved.
Patent content
The purpose of this patent is to design an electric cooling production recycle system of hydrogenation station and natural gas pressure regulating station, makes it take into account the main energy demand of natural gas pressure regulating station and hydrogenation station comprehensively, utilizes electricity, cold, hot production and demand complementarity characteristics to design out economical and reasonable and advanced process technology scheme, realizes complementary energy production, recovery and comprehensive utilization system, reaches the purpose that the reduction cost produced economic benefits.
In order to achieve the above purpose, the present patent provides the following technical scheme:
As shown in fig. 3, an electric cooling production recycling system of a hydrogenation station and a natural gas pressure regulating station comprises a hydrogenation station energy system and a natural gas pressure regulating station energy system;
The hydrogenation station energy system comprises a hydrogen input device, a compressor, a heat exchanger A, a hydrogen storage tank, a hydrogenation machine, a heat exchanger B and an automobile-mounted bottle which are connected in sequence; the cooling system is characterized by further comprising a refrigerating device and a cold energy allocation center, wherein the refrigerating device is connected with the cold energy allocation center, and the cold energy allocation center is respectively connected with the compressor, the heat exchanger A and the heat exchanger B and used for cooling the cold energy transferred by the compressor, the heat exchanger A and the heat exchanger B; the power distribution device is electrically connected with the external power grid, and the power distribution device is electrically connected with the power supply system of the hydrogen adding station;
The natural gas pressure regulating station energy system comprises a natural gas input pipeline, one or more pressure regulating loops and a natural gas output pipeline which are connected in sequence; the multiple pressure regulating loops are connected in parallel, and each pressure regulating loop comprises a heat exchanger C and a pressure regulator; the heat supply device is connected with the heat exchanger C;
One or more electric cooling production circuits are additionally arranged in the natural gas pressure regulating station, the electric cooling production circuits are formed by combining one or more sets of electric cooling production units, the multiple electric cooling production circuits are connected in parallel, and the multiple sets of electric cooling production units of each electric cooling production circuit are connected in series; each set of electric cooling production unit comprises a pressure energy power generation device and a cooling energy production device, and the power generated by the pressure energy power generation device is connected with the power distribution device; the cold energy production device is connected with the cold energy allocation center; the pressure energy generating device and the cold energy generating device of the electric cooling production unit are taken as a whole and mainly comprise an expander, a generator, a heat exchanger D and a refrigerant.
Furthermore, the electric cooling production unit is designed for an integrated pry. The integrated sled design is an integrated mode that integrates functional components on a whole base and can be integrally installed and moved. The device realizes standard series product specification, and is flexible and convenient.
Further, the expander is a double-rotor expander or a screw expander or a turbine expander.
Further, the generator is an asynchronous generator or a synchronous generator.
Further, the refrigerant is a refrigerant capable of being purchased to be matched with different low-temperature sections, and the refrigerant can adapt to different temperature positions by changing the corresponding material proportion of the refrigerant. The above-mentioned effects can be achieved by using a common refrigerant.
Further, the energy of the heat supply device is supplied by one or more of a solar photo-thermal system, fuel gas and electric power.
Further, a photovoltaic power generation device and a biomass power generation device are further arranged, and power generated by the photovoltaic power generation device and the biomass power generation device is connected with the power distribution device.
The basic idea of the technical scheme of the patent is as follows:
1) Overall two station electric cold and heat energy requirement discovers: the energy requirements of the two stations have obvious complementary characteristics, namely, the natural gas pressure regulating station needs to input heat energy to heat low-temperature natural gas, and the pressure difference can generate electricity to externally provide electric power and output cold energy; the hydrogenation station just forms a complementary relation with the hydrogenation station, and electric power and cold energy need to be input, so that heat energy can be provided for the outside. This provides for uniform consideration of the electrical and thermal requirements of the two stations, implementing reciprocal complementation.
2) The pressure difference in the pressure regulating process of the natural gas pressure regulating station is converted into electric power and cold energy through a specific device, namely an electric cooling production unit, the electric power is provided for a hydrogenation station compressor as driving source power, the cold energy is output as a cold source to heat the temperature rise of a lubricating oil circulating system, a hydrogen pressurizing process and a hydrogen filling process of the hydrogenation station compressor, and the heated heat energy is returned to the electric cooling production unit or the cold energy allocation center of the natural gas pressure regulating station through a specific refrigerant.
3) The cold energy output by the electric cooling production unit of the natural gas pressure regulating station can be directly output to each heat exchange device of the hydrogenation station through a refrigerant according to a temperature opposite port and cascade utilization principle, and can also be intensively sent to a cold energy allocation center for uniform distribution.
4) Cold energy utilization principle of hydrogenation station: the cold energy generated by the pressure energy of the electric cooling production unit is preferentially used, and the insufficient part is refrigerated and supplemented by the original refrigerating device, so that the supply and demand balance is ensured; the pressure energy cold energy is high-grade cold energy, and the electric refrigerating device can produce low-grade cold energy as much as possible so as to reduce consumption.
5) The solar photo-thermal system or the biomass heat energy production device is introduced to produce hot water and is combined with the hot water boiler heating system, so that the renewable energy production is increased and the energy consumption in a station is reduced.
6) The heat energy utilization principle of the natural gas pressure regulating station is as follows: the heat energy from the hydrogenation station and the heat energy of the solar photo-thermal system are preferentially used, and the deficiency is supplemented by the production of the original heating devices such as a hot water boiler and the like.
7) The photovoltaic power generation device or the biomass power generation device is introduced to be integrated into a power generation system, so that the renewable energy source production is increased, and the energy consumption in the station is reduced.
8) Hydrogen station power supply principle: the pressure energy power generation device from the natural gas pressure regulating station and the photovoltaic power generation device or the biomass energy power generation device are preferably used, and the deficiency is supplemented by external grid power.
9) And an energy management system with two stations integrated in a unified way is arranged, so that overall production and consumption of energy sources, particularly electricity, cold and heat, of the two stations are achieved, and the production cost is ensured to be minimized.
The technical scheme of the patent works on the principle:
1) As shown in figure 4, an electric cooling production loop connected in parallel with the conventional pressure regulating loop is additionally arranged in the natural gas pressure regulating station, and the electric cooling production loop not only generates electric power and cold energy, but also can replace a pressure regulator to reduce and stabilize pressure.
The electric cooling production loop can be arranged as one loop, and N loops are connected in parallel, and the electric cooling production loop is related to the natural gas flow and the like.
2) As shown in fig. 4, each electric cooling production loop can be formed by connecting a set of N sets of electric cooling production units, namely a pressure energy generating device and a cold energy production device, in series, and the combination is related to the pressure difference.
In the electric cooling production unit assembly, high-pressure natural gas enters as a medium, and enters a cold energy production device through isentropic expansion, depressurization and cooling. On one hand, the kinetic energy drives the generator to do work to generate electric power, on the other hand, the natural gas is depressurized and then the temperature is reduced to generate cold energy, and the cold energy is transmitted to the cold equipment for supplying the refrigerant through the heat exchanger.
The electric cooling production unit is generally composed of an expander, a generator, a heat exchanger and a refrigerant.
The expander can be a double-rotor expander, a turbine expander or a screw expander. The expander plays roles of reducing and stabilizing pressure and generating kinetic energy of a conventional pressure regulator, and simultaneously generates cold energy (low-temperature natural gas). In general, high-pressure natural gas is subjected to pressure regulation and voltage stabilization through an electric cooling production loop, and the conventional pressure regulation loop is only used as emergency standby or load balancing;
The generator is driven by a connecting shaft in the expander to rotate by means of pressure differential energy to generate electricity, and the pressure energy is converted into electric energy. The generator may be a synchronous generator or an asynchronous generator.
The cold energy production device consists of an expander, a heat exchanger and a refrigerant, wherein the low-temperature natural gas subjected to depressurization, expansion and power generation exchanges cold energy with the refrigerant in the heat exchanger, and the cold energy is transmitted to the refrigerant for delivery.
The refrigerant is a refrigerant which can be matched with different temperature sections, and is realized by changing corresponding materials and proportions of the refrigerant. The selection principle of the refrigerant is based on temperature level alignment, cascade utilization and high-efficiency output.
3) Electric power generated by electric cooling production unit
As shown in fig. 5, in order to exert efficiency, devices such as a photovoltaic power generation device and a biomass power generation device are additionally arranged at a voltage regulating station or a hydrogenation station according to specific conditions, renewable energy sources such as solar photovoltaic and biomass are fully utilized for power generation, the renewable energy sources and the pressure power generation device are simultaneously connected to a power distribution device, and meanwhile, external grid power is introduced, so that networking operation with a large grid is realized, and the reliability of the system is improved.
Principle of electric power system: the pressure energy power generation device of the electric cooling production unit and the photovoltaic power generation device or the biomass energy power generation device run at full load (high load) as far as possible, and particularly, the power generation at peak period of the power grid is ensured; the power generated by pressure energy power generation, photovoltaic power generation and biomass power generation is preferentially utilized in the station; and (5) selling the redundant part of power on the internet, and purchasing the rest part of power to supplement the external grid power.
All the electric power is preferentially supplied to compressors and other electric equipment in the hydrogenation station to serve as power, and the self-power-consumption requirements in two stations are preferentially met.
4) Cold energy generated by electric cold production unit
After the high-pressure natural gas is taken as a medium and enters the expander equipment to generate power through isentropic expansion and depressurization, the temperature of the natural gas is greatly reduced, a large amount of high-grade low-temperature cold energy is generated, and obvious economic benefits can be generated by utilizing the cold energy.
The principle of the patent for utilizing the cold energy is 'according to grade, temperature, grade and gradient utilization', and the value of the cold energy is reasonably realized. For example, after different grade cold energy is transmitted to the hydrogenation station through the refrigerant with corresponding temperature level for the pressurization and filling process of the hydrogenation station, the high-grade cold energy is used for producing cold products with high added value for sale.
The original heating device (natural gas hot water boiler, electric water heater) for heating the conventional pressure regulating loop is stopped according to the specific conditions, so as to save energy.
Compared with the prior art, the beneficial effect of this patent:
1. The energy process routes of the two stations of the hydrogenation station and the natural gas pressure regulating station are comprehensively optimized, and an advanced, reasonable and practical integral process technology, namely a double-station electric cold and hot production and comprehensive utilization system is developed, so that the goal of high-efficiency energy utilization with complementary energy is realized.
2. The original abandoned and unused pressure energy of the natural gas pressure regulating station is used for producing electric power and cold energy through the electric cooling production unit, and the electric power and the cold energy are closely conveyed to the hydrogenation station for use, so that economic benefits are generated.
3. The original voltage regulator of the natural gas voltage regulating station is replaced by the electric cooling production unit, and the electric cooling production unit is responsible for regulating the high-pressure natural gas voltage.
4. The energy production devices such as a photovoltaic power generation device, a biomass energy power generation device, a solar photo-thermal system and the like are introduced, renewable energy sources are fully utilized, and the double-station operation cost is reduced.
5. And the refrigerant is developed to meet the individual requirements of different temperature sections of the double stations.
6. The comprehensive energy management system for the coordinated operation of the two stations is developed, the highest utilization rate of the whole energy of the two stations, the lowest energy consumption, the most reasonable energy matching and the improvement of the safety and reliability are ensured, and obvious economic and social benefits are generated.
7. The electric cooling production unit adopts an integrated pry design, and products are produced in a series of standardized specifications, so that the electric cooling production unit is convenient and flexible.
Drawings
In order to more clearly illustrate the embodiments of the present patent or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the present patent, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a prior art energy use system for a hydrogen station;
FIG. 2 is a schematic diagram of a prior art energy use system for a natural gas pressure regulating station;
FIG. 3 is a schematic diagram of the solution of the present patent;
FIG. 4 is a schematic diagram of an electric cooling production circuit of the natural gas pressure regulating station of the present patent;
FIG. 5 is a schematic diagram of the power system of the present patent;
FIG. 6 is a schematic diagram of the technical solution of example 1 of the present patent;
FIG. 7 is a schematic diagram of the technical solution of example 2 of this patent;
Detailed Description
The following description of the embodiments of the present patent will be made clearly and fully with reference to the accompanying drawings, in which it is evident that only some, but not all embodiments of the present patent are described. All other embodiments, based on the embodiments in this patent, which would be apparent to one of ordinary skill in the art without making any inventive effort, are within the scope of this patent.
Example 1 and its working principle:
As shown in FIG. 6, example 1 is a 1000 kg/day hydrogen addition station built by a gas company in the south at a natural gas pressure regulating station. The natural gas treatment capacity of the pressure regulating device in the natural gas pressure regulating station is 2.8 ten thousand m 3/h, and the natural gas flow is stable and balanced; the temperature of the natural gas inlet before entering the pressure regulating device is 12 ℃ and the pressure is 3.5-3.8 MPa; and regulating the pressure by adopting a primary pressure regulating loop, wherein the natural gas pressure of the pressure regulating device is stabilized at 0.4MPa. The natural gas is LNG gasified gas, clean and free of sulfur and other various impurities.
Aggregate design ideas and basic principles:
1. Besides the pressure regulating circuit, an electric cooling production circuit is designed to be connected in parallel with the pressure regulating circuit, and the electric cooling production circuit comprises 2-stage electric cooling production units which are connected in series, namely a pressure energy power generation device 1 and a cold energy production device 1, a pressure energy power generation device 2 and a cold energy production device 2, and a pressure fine adjustment device for stabilizing pressure.
2. The power generated by the two series-connected pressure energy power generation devices is simultaneously integrated into the power distribution device for unified allocation and use, the priority of self-use is given to the self-use, and the main electric equipment is a hydrogen compressor of the hydrogen adding station.
3. A set of photovoltaic power generation device and a set of pressure energy power generation device are designed to be simultaneously combined with a power distribution device and are operated in a grid-connected mode with external grid power.
4. The cold energy production device 1 and the cold energy production device 2 in the electric cold production unit have different temperature (-8 ℃ and-18 ℃) of the refrigerant A and the refrigerant B which enter a cold energy allocation center to exchange heat with the refrigerant 1, the refrigerant 2 and the refrigerant 3; according to the principle of temperature opposite-port and cascade utilization, the refrigerants 1,2 and 3 with different grades are respectively sent into compressor lubricating oil of a hydrogenation station, high-temperature hydrogen in a heat exchanger behind the compressor and high-temperature hydrogen exchange heat in a heat exchanger in front of the hydrogenation machine, and then return to a cold energy allocation center to exchange heat with the refrigerant A and the refrigerant B; the temperatures of the refrigerant A and the refrigerant B returned to the cold energy production device 1 and the cold energy production device 2 respectively reach 6 ℃ and 10 ℃.
5. And (5) setting a refrigerating device to supplement cold energy or for standby.
Specific technical parameters and equipment type selection:
1. overall design
1. The design flow of the electric cooling production loop is 3.0 ten thousand m 3/h, which is slightly higher than the actual natural gas flow, so that the natural gas is ensured to enter the pressure energy power generation device of the electric cooling production unit, namely the expander to do work, and the expander works at about 90% load, so that the highest device efficiency is obtained.
2. And a conventional pressure regulating loop is used for standby.
3. Because the pressure difference of the electric cooling production circuit is about 3.1MPa, a secondary electric cooling production unit is arranged (the compression ratio is insufficient, and a 3-stage recovery device is arranged).
4. In consideration of the conditions of large cold energy demand and emergency of the hydrogenation station, a set of refrigerating device is arranged to enter a refrigerating device distribution system to be used as cold energy supplement or emergency standby.
2. Power system design
1. The pressure energy generating device 1 and the pressure energy generating device 2 in the electric cooling production unit are respectively screw expansion machines, and asynchronous generators with the power of 400KW, which correspond to the screw expansion machines with the rated flow of 3.0 ten thousand m 3/h, are selected.
2. In consideration of fluctuation of the inlet pressure of the natural gas, a micro-regulating device (with a pressure stabilizing function) is arranged in front of the first-stage pressure energy generating device to eliminate the fluctuation, and the outlet pressure of the micro-regulating device is set to be 3.4MPa.
3. The compression ratio of the inlet air and the outlet air of the two sets of screw expanders is designed to be 2.6 times. Therefore, the pressure of the first-stage pressure energy power generation device is 3.4MPa, and the outlet pressure is 1.3MPa; the pressure of the second-stage pressure energy generating device is 1.3MPa, and the outlet pressure is 0.4MPa.
4. Natural gas with the actual flow of 2.8 ten thousand m 3/h enters the first-stage screw expander and the second-stage screw expander, isentropic expansion work is performed respectively to drive the power generation device, the generated power is about 3X 350KW/h, and the power generation capacity in the whole day is about 1.68 ten thousand KW h.
5. The power generation capacity of the photovoltaic power generation device is about 120 kw.
6. The power system adopts grid connection arrangement. The generated power is preferably used by itself, the power of the power grid is supplemented for the rest part, and the rest part is sold on the internet.
3. Design parameters of cold energy system
1. The temperature of the natural gas at the inlet of a first-stage screw expander in the electric cooling production loop is 11 ℃, the inlet pressure is stabilized at 3.4MPa, the pressure of the natural gas at the outlet after isentropic expansion work is 1.3MPa, and the outlet temperature is-8 ℃.
2. Natural gas at the temperature of minus 8 ℃ enters a first-stage electric cooling production unit (cold energy production device 1) to exchange heat with a refrigerant A, and natural gas is discharged at the temperature of 4 ℃; the refrigerant inlet temperature is 9 ℃ and the refrigerant outlet temperature is-3 ℃.
3. The temperature of the natural gas entering the second-stage cold energy production device 2 is 4 ℃, and the outlet temperature of the natural gas after isentropic expansion work is-18 ℃.
4. Natural gas with the outlet temperature of-18 ℃ enters a second-stage electric cooling production unit (cold energy production device 2) to exchange heat with a refrigerant B, and the outlet temperature is 5 ℃; the refrigerant inlet temperature is 10 ℃ and the refrigerant outlet temperature is-13 ℃.
4. Economic benefit
1. Besides the self-power consumption of a hydrogen station compressor, a station air conditioning system, a lighting system and the like is about 1200kw to h, the electric power can be on the internet for 1.57 kw to h/day, and the annual economic benefit is 350 ten thousand yuan.
The first-stage cold energy production device can recover 0.36 ten thousand kw of cold energy for h/day; the second stage cold energy production device can recover 5.7 ten thousand kw of cold energy, which is about h/day. The cold requirement of the hydrogenation station is about 0.85 ten thousand kw h/day, and the surplus part of the processed cold product is sold. The annual economic benefit is about 87 ten thousand yuan.
Example 2 and its working principle:
As shown in fig. 7, in example 2, a hydrogen adding station is built in a station of a certain natural gas company in the north to develop a hydrogen energy automobile, and the design scale of the hydrogen adding station is 500 kg/day; the natural gas treatment capacity of the pressure regulating device in the natural pressure regulating station is about 1.2 ten thousand m 3/h, the natural gas flow is unstable and has fluctuation, and the fluctuation range is 0.9-1.4 ten thousand m 3/h; the temperature of the natural gas inlet is 20 ℃ before entering the pressure regulating device, and the pressure is 0.8 MPa; and the pressure is regulated by adopting a primary pressure regulating loop, and the natural gas pressure of the pressure regulating device is stabilized to be 0.3MPa. The natural gas is LNG gasified gas, clean and free of sulfur and other various impurities.
Aggregate design ideas and basic principles:
1. Besides the pressure regulating circuit, an electric cooling production circuit is designed to be connected in parallel with the pressure regulating circuit, and the electric cooling production circuit consists of a primary electric cooling production unit and comprises a set of pressure energy generating device and cold energy generating device.
2. Because the flow fluctuation is large, the working mode of 'conventional pressure regulating circuit plus electric cooling production circuit' is adopted to simultaneously run, so that the natural gas flow of the electric cooling production circuit is ensured to be stabilized at 0.8 ten thousand m 3/h, and the redundant part of 0.1-6 ten thousand m 3/h enters the conventional pressure regulating circuit to regulate the pressure.
3. The electric power generated by the pressure energy generating device is preferentially used by the power distribution device, and the main electric equipment is a hydrogen compressor.
4. The cooling medium at the temperature of minus 8 ℃ of the cooling energy production device enters a cooling energy allocation center distribution system and exchanges heat with the cooling medium 1, the cooling medium 2 and the cooling medium 3; according to the principle of temperature opposite-port and cascade utilization, refrigerants 1, 2 and 3 with different grades are respectively sent into compressor lubricating oil of a hydrogenation station, high-temperature hydrogen in a heat exchanger behind the compressor and high-temperature hydrogen exchange heat in a heat exchanger in front of the hydrogenation machine, and then return to a cold energy allocation center distribution system to exchange heat with the refrigerants; the temperature of the cooling medium returned to the cold energy production device reaches 6 ℃ respectively.
5. And (5) setting a refrigerating device to supplement cold energy or for standby.
Specific technical parameters and equipment type selection:
1. overall design
1. The design flow of the electric cooling production loop is 0.8 ten thousand m 3/h, which is slightly higher than the minimum flow of the actual natural gas, so that the natural gas is ensured to enter the pressure energy power generation device, namely the expander to do work, and the expander works at about 90% of load, so that the highest device efficiency is obtained.
2. Because the pressure difference of the electric cooling production loop is about 2.25MPa, a primary electric cooling production unit is arranged.
3. In consideration of the conditions of large cold energy demand and emergency of the hydrogenation station, a set of refrigerating device is arranged to enter a cold energy distribution system of a cold energy distribution center to be used as cold energy supplement or emergency standby.
2. Power system design
1. The pressure energy generating device selects a double-rotor expander, and the corresponding generator is an asynchronous motor with the power of 80 KW.
2. Considering that the fluctuation amplitude of the natural gas inlet pressure is large, the simultaneous operation mode of the electric cooling production loop and the conventional pressure regulating loop is adopted, the stable load operation of the double-rotor expander is preferentially ensured, and the redundant part is regulated by the conventional natural gas pressure regulating loop.
3. The inlet and outlet compression ratio of the double-rotor expander is designed to be about 2.2 times, natural gas with the actual inlet air flow of 0.8 ten thousand m 3/h enters the expander to perform isentropic expansion to do work so as to drive the power generation device, the generated power is about 80KW/h, and the power generation capacity in the whole day is about 1920KW & h.
4. The power system adopts grid connection arrangement. The generated power is preferably used by itself, the power of the power grid is supplemented for the rest part, and the rest part is sold on the internet.
3. Design parameters of cold energy system
1. The temperature of the natural gas at the inlet of the expander is 20 ℃, the inlet pressure is stabilized at 0.8MPa, the pressure of the natural gas at the outlet after isentropic expansion work is 0.3MPa, and the outlet temperature is-10 ℃.
2. Natural gas at the temperature of minus 10 ℃ enters a cold energy production device to exchange heat with a refrigerant, and natural gas is discharged at the temperature of 6 ℃; the refrigerant inlet temperature is 10 ℃ and the refrigerant outlet temperature is-5 ℃.
4. Economic benefit
1. Besides the self-power consumption of a hydrogen station compressor, a station air conditioning system, a lighting system and the like is about 1200kw to h, 720kw of electricity per day can be accessed, and the annual economic benefit is 15.8 ten thousand yuan.
The cold energy production device can recover 1200kw of cold energy, and the cold energy is totally used for the hydrogen station. The annual economic benefit is about 8.64 ten thousand yuan.
Claims (5)
1. An electric cooling production recycling system of a hydrogenation station and a natural gas pressure regulating station comprises a hydrogenation station energy system and a natural gas pressure regulating station energy system;
the hydrogenation station energy system comprises a hydrogen input device, a compressor, a heat exchanger A, a hydrogen storage tank, a hydrogenation machine, a heat exchanger B and an automobile-mounted bottle which are connected in sequence; the cooling system is characterized by further comprising a refrigerating device and a cold energy allocation center, wherein the refrigerating device is connected with the cold energy allocation center, and the cold energy allocation center is respectively connected with the compressor, the heat exchanger A and the heat exchanger B and used for cooling the cold energy transferred by the compressor, the heat exchanger A and the heat exchanger B; the power distribution device is electrically connected with the external power grid, and is electrically connected with the hydrogen station power system;
The natural gas pressure regulating station energy system comprises a natural gas input pipeline, one or more pressure regulating loops and a natural gas output pipeline which are connected in sequence; the multiple pressure regulating loops are connected in parallel, and each pressure regulating loop comprises a heat exchanger C and a pressure regulator; the heat supply device is connected with the heat exchanger C;
The method is characterized in that: one or more electric cooling production circuits are additionally arranged in the natural gas pressure regulating station, the electric cooling production circuits are formed by combining one or more sets of electric cooling production units, the multiple electric cooling production circuits are connected in parallel, and the multiple sets of electric cooling production units of each electric cooling production circuit are connected in series; each set of electric cooling production unit comprises a pressure energy power generation device and a cooling energy production device, and the power generated by the pressure energy power generation device is connected with the power distribution device; the cold energy generated by the cold energy production device is connected with the cold energy allocation center through a refrigerant; the pressure energy power generation device and the cold energy production device of the electric cooling production unit mainly comprise an expander, a generator, a heat exchanger D and a refrigerant;
The power generated by the pressure energy power generation device preferentially meets the power requirements of the compressor, the power requirements of the hydrogenation station and the natural gas pressure regulating station, and the rest part is sold on the internet or the rest part is purchased outside the external power grid for power supplement; the cold energy generated by the cold energy production device preferentially meets the cold requirement of the heat exchanger A and the heat exchanger B, and the rest part is sold or the rest part is supplemented by the refrigeration device; the generator is an asynchronous generator or a synchronous generator; the refrigerant is a refrigerant capable of being purchased to be matched with different low-temperature sections, and is suitable for different temperature positions by changing corresponding materials and proportions of the refrigerant.
2. The electric refrigeration production recycling system of a hydrogen adding station and a natural gas pressure regulating station according to claim 1, wherein: the electric cooling production unit is designed for an integrated pry.
3. The electric refrigeration production recycling system of a hydrogen adding station and a natural gas pressure regulating station according to claim 1, wherein: the expander is a double-rotor expander or a screw expander or a turbine expander.
4. The electric refrigeration production recycling system of a hydrogen adding station and a natural gas pressure regulating station according to claim 1, wherein: the power distribution device is characterized by further comprising a photovoltaic power generation device or a biomass power generation device, wherein the power generated by the photovoltaic power generation device or the biomass power generation device is connected with the power distribution device.
5. The electric refrigeration production recycling system of a hydrogen adding station and a natural gas pressure regulating station according to claim 1, wherein: the energy of the heat supply device is supplied by one or more of a solar photo-thermal system, a biomass energy power generation device, fuel gas and electric power.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010139963.5A CN111219596B (en) | 2020-03-03 | 2020-03-03 | Electric cooling production recycling system of hydrogenation station and natural gas pressure regulating station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010139963.5A CN111219596B (en) | 2020-03-03 | 2020-03-03 | Electric cooling production recycling system of hydrogenation station and natural gas pressure regulating station |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111219596A CN111219596A (en) | 2020-06-02 |
| CN111219596B true CN111219596B (en) | 2024-05-24 |
Family
ID=70829955
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010139963.5A Active CN111219596B (en) | 2020-03-03 | 2020-03-03 | Electric cooling production recycling system of hydrogenation station and natural gas pressure regulating station |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111219596B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114754287A (en) * | 2021-01-08 | 2022-07-15 | 神华氢能科技如皋有限责任公司 | Movable hydrogen filling platform |
| CN112648528B (en) * | 2021-02-02 | 2022-05-03 | 河南省标准化研究院 | Gas cylinder inflation control device |
| US11608938B2 (en) * | 2021-07-09 | 2023-03-21 | China Energy Investment Corporation Limited | System and method for refueling and backup power generation |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5839383A (en) * | 1995-10-30 | 1998-11-24 | Enron Lng Development Corp. | Ship based gas transport system |
| CN1963347A (en) * | 2006-11-21 | 2007-05-16 | 华南理工大学 | Method for using cooling capacity of LNG with cooling media as medium and apparatus thereof |
| CN101061014A (en) * | 2004-11-18 | 2007-10-24 | 株式会社丰田自动织机 | Hydrogen tank cooling device and cooling method for hydrogen fuel automobile, and hydrogen fuel automobile |
| CN103062619A (en) * | 2012-12-21 | 2013-04-24 | 张建洲 | Motor vehicle hydrogen refueling station system |
| CN203847188U (en) * | 2014-05-13 | 2014-09-24 | 北京华航盛世能源技术有限公司 | Complementary energy comprehensive utilization system of natural gas regulator station |
| CN107990146A (en) * | 2017-12-26 | 2018-05-04 | 武汉联合立本能源科技有限公司 | A kind of natural gas pressure regulating door station pressure energy recycles utilization system |
| CN207599346U (en) * | 2017-11-16 | 2018-07-10 | 新地能源工程技术有限公司 | Movable skid-mounted formula natural gas pressure regulating, power generation, refrigerating plant |
| CN212273682U (en) * | 2020-03-03 | 2021-01-01 | 佛山市燃气集团股份有限公司 | Electricity cold production recycle system of hydrogenation station and natural gas pressure regulating station |
| CN113983352A (en) * | 2021-11-12 | 2022-01-28 | 重庆耐德能源装备集成有限公司 | Hydrogen cooling system of hydrogenation and liquefied natural gas combined station |
| CN117167650A (en) * | 2023-08-07 | 2023-12-05 | 广东能源集团科学技术研究院有限公司 | LNG cold energy recycling system and method |
-
2020
- 2020-03-03 CN CN202010139963.5A patent/CN111219596B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5839383A (en) * | 1995-10-30 | 1998-11-24 | Enron Lng Development Corp. | Ship based gas transport system |
| CN101061014A (en) * | 2004-11-18 | 2007-10-24 | 株式会社丰田自动织机 | Hydrogen tank cooling device and cooling method for hydrogen fuel automobile, and hydrogen fuel automobile |
| CN1963347A (en) * | 2006-11-21 | 2007-05-16 | 华南理工大学 | Method for using cooling capacity of LNG with cooling media as medium and apparatus thereof |
| CN103062619A (en) * | 2012-12-21 | 2013-04-24 | 张建洲 | Motor vehicle hydrogen refueling station system |
| CN203847188U (en) * | 2014-05-13 | 2014-09-24 | 北京华航盛世能源技术有限公司 | Complementary energy comprehensive utilization system of natural gas regulator station |
| CN207599346U (en) * | 2017-11-16 | 2018-07-10 | 新地能源工程技术有限公司 | Movable skid-mounted formula natural gas pressure regulating, power generation, refrigerating plant |
| CN107990146A (en) * | 2017-12-26 | 2018-05-04 | 武汉联合立本能源科技有限公司 | A kind of natural gas pressure regulating door station pressure energy recycles utilization system |
| CN212273682U (en) * | 2020-03-03 | 2021-01-01 | 佛山市燃气集团股份有限公司 | Electricity cold production recycle system of hydrogenation station and natural gas pressure regulating station |
| CN113983352A (en) * | 2021-11-12 | 2022-01-28 | 重庆耐德能源装备集成有限公司 | Hydrogen cooling system of hydrogenation and liquefied natural gas combined station |
| CN117167650A (en) * | 2023-08-07 | 2023-12-05 | 广东能源集团科学技术研究院有限公司 | LNG cold energy recycling system and method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111219596A (en) | 2020-06-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111219596B (en) | Electric cooling production recycling system of hydrogenation station and natural gas pressure regulating station | |
| CN114198170B (en) | Carbon dioxide energy storage system based on double heat storage loops and working method thereof | |
| CN110598301B (en) | Parameter coupling design method for liquefied air energy storage system | |
| CN109163214B (en) | Hydrogenation station | |
| CN109826682B (en) | Integrated energy supply system capable of realizing combined supply of cold, heat and electricity | |
| CN108386719B (en) | A kind of pipe natural gas pressure energy cold energy comprehensive utilization device and method | |
| CN103438612B (en) | Compressed gas distributed energy source system using rare gases as working medium | |
| CN212273682U (en) | Electricity cold production recycle system of hydrogenation station and natural gas pressure regulating station | |
| CN108167076B (en) | Comprehensive distributed energy system for steam optimal utilization | |
| CN112178615A (en) | Electric-steam air-cooling multi-combined supply system based on liquid compressed air energy storage system | |
| CN105135751A (en) | Heating, electricity and cooling combined supply system based on heat pump technology and air compression and electricity storage technology | |
| JP2017223436A (en) | Method and apparatus for cooling in liquefaction process | |
| CN114856738A (en) | Combined cooling heating and power energy storage system and method based on liquid carbon dioxide storage | |
| RU2665752C1 (en) | Installation for combined electrical and cold supply at gas distribution station | |
| CN204923571U (en) | Thermoelectric cold trigeminy supplies system based on heat pump technique and compressed air electric power storage technique | |
| CN107706926B (en) | Power grid black start and frequency modulation device and method based on battery pack and liquid air energy storage | |
| CN109944650B (en) | Combined cooling, heating and power system and method containing supercritical compressed air energy storage | |
| CN203518328U (en) | Compressed gas distribution type energy system using rare gas as working media | |
| CN110185506B (en) | Pressure energy comprehensive utilization system of natural gas pressure regulating station | |
| CN114991891A (en) | Compressed air energy storage system and method | |
| CN213478413U (en) | Intermediate steam extraction type liquefied natural gas cold energy power generation system based on pressure distribution | |
| CN212803351U (en) | LNG cold energy utilization power generation device | |
| CN205714296U (en) | Natural gas gas storage well peak regulation energy conserving system | |
| CN110953916B (en) | Efficient waste heat recovery system and method for air compressor | |
| CN203572140U (en) | Copious cooling rectification hydraulic system for synthetic ammonia chemical tail gas |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: 528000 Jihua five road, Chancheng District, Foshan, Guangdong Province, No. 25 Applicant after: Fo ran Energy Group Co.,Ltd. Address before: 528000 Jihua five road, Chancheng District, Foshan, Guangdong Province, No. 25 Applicant before: FOSHAN GAS GROUP CO.,LTD. |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |