CN110863906B - Energy supply system and method - Google Patents
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- CN110863906B CN110863906B CN201911054913.0A CN201911054913A CN110863906B CN 110863906 B CN110863906 B CN 110863906B CN 201911054913 A CN201911054913 A CN 201911054913A CN 110863906 B CN110863906 B CN 110863906B
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- 238000000034 method Methods 0.000 title claims abstract description 24
- 239000007789 gas Substances 0.000 claims abstract description 83
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 77
- 239000001301 oxygen Substances 0.000 claims abstract description 77
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 77
- 238000000746 purification Methods 0.000 claims abstract description 63
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 60
- 238000003786 synthesis reaction Methods 0.000 claims abstract description 60
- 238000010248 power generation Methods 0.000 claims abstract description 51
- 239000003245 coal Substances 0.000 claims abstract description 28
- 239000003034 coal gas Substances 0.000 claims abstract description 28
- 238000004146 energy storage Methods 0.000 claims abstract description 23
- 230000005611 electricity Effects 0.000 claims abstract description 22
- 238000003860 storage Methods 0.000 claims description 31
- 238000002309 gasification Methods 0.000 claims description 21
- 239000002826 coolant Substances 0.000 claims description 18
- 238000010521 absorption reaction Methods 0.000 claims description 7
- 238000005057 refrigeration Methods 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 4
- 238000003912 environmental pollution Methods 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 description 11
- 238000002485 combustion reaction Methods 0.000 description 6
- 239000012535 impurity Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 239000000843 powder Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- -1 for example Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 238000006479 redox reaction Methods 0.000 description 1
- 239000004449 solid propellant Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C6/00—Plural gas-turbine plants; Combinations of gas-turbine plants with other apparatus; Adaptations of gas-turbine plants for special use
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10J—PRODUCTION OF PRODUCER GAS, WATER-GAS, SYNTHESIS GAS FROM SOLID CARBONACEOUS MATERIAL, OR MIXTURES CONTAINING THESE GASES; CARBURETTING AIR OR OTHER GASES
- C10J3/00—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/10—Adaptations for driving, or combinations with, electric generators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B35/00—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for
- F04B35/04—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being electric
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The application discloses an energy supply system and method, and relates to the technical field of energy supply. The energy storage power generation unit of the energy supply system comprises a motor, a compressor, a combustor, an expansion turbine and a power generator which are sequentially connected, wherein the motor is connected with the compressor, the compressor is also connected with an oxygen generation device, and the power generator is connected with the expansion turbine. The output cooled synthesis gas can be used as coal gas by users; the combustor combusts the synthesis gas output by the heat exchange purification device according to the output compressed air, so that the expansion turbine does work to control the generator to generate electricity, on one hand, the compressor provides electric energy for the compressor, the compressor continuously compresses the air, the coal gas unit generates the synthesis gas, and the electric energy generated by the generator can also supply power for users; the heat accumulator can output the collected heat to provide heat energy for users, thereby realizing the gradient utilization of energy, having high energy utilization rate, reducing the environmental pollution caused by the burning of the scattered coal, saving energy and protecting environment.
Description
Technical Field
The present disclosure relates to the field of energy supply technologies, and in particular, to an energy supply system and method.
Background
Electric energy, heat energy and coal gas are one of main energy sources required by people in life, and one of the source modes of the coal gas is as follows: coal is used as a raw material, an independent coal gas making system is utilized, oxygen or water vapor is used as a gasifying agent, a series of partial oxidation-reduction reactions are carried out under certain pressure and temperature, and the coal is converted into coal gas from a solid fuel state; the mode of generating electric energy, heat energy is mainly power plant or steam power plant, in addition, bulk coal burning heating is the common heating mode in northern rural areas, 1 ton of bulk coal burning is equivalent to 5 to 10 tons of pollutants that coal fired power plant discharged, and, the quantity of bulk coal still increases, can cause very big pollution. However, when the coal gasification and the production of electric energy and heat energy are separately performed, a large amount of equipment is required, the investment cost is high, and the energy utilization efficiency is low.
Disclosure of Invention
The embodiment of the application provides an energy supply system and method to solve the problems of more required equipment, high investment cost, low energy utilization efficiency and environmental pollution caused by scattered coal combustion when coal gasification and production of electric energy and heat energy are independently carried out.
The first aspect of the embodiment of the application provides an energy supply system, which comprises a coal gas unit and an energy storage and power generation unit, wherein the coal gas unit comprises an oxygen generation device, a gasification furnace, a heat exchange purification device and a heat accumulator which are sequentially connected, the energy storage and power generation unit comprises a compressor, a combustor, an expansion turbine and a power generator which are sequentially connected, the energy storage and power generation unit further comprises an electric motor, the electric motor is connected with the compressor, the compressor is also connected with the oxygen generation device, the heat exchange purification device is also connected with the combustor, the expansion turbine is connected with the power generator,
the system comprises a motor, an oxygen generator, a gasification furnace and a gasification furnace, wherein the motor is configured to drive the compressor to compress air to generate compressed air for output, the oxygen generator is configured to prepare oxygen according to the compressed air and input the oxygen into the gasification furnace, and the gasification furnace is configured to generate synthesis gas according to the oxygen and input coal powder;
the heat exchange purification device is configured to carry the synthesis gas into the heat accumulator through the cooling medium, the heat accumulator is configured to collect heat in the cooling medium, generate cooled synthesis gas and feed the cooled synthesis gas back to the heat exchange purification device, the heat exchange purification device is further configured to purify and output the cooled synthesis gas,
the combustor is configured to combust the synthesis gas output by the heat exchange purification device according to the output compressed air, so that the expansion turbine works to control the generator to generate electricity to provide electric energy for the compressor.
Further, the heat exchange purification device comprises a heater, wherein the heater is connected with the heat accumulator, the heat accumulator is also configured to heat compressed air in the heater according to the collected heat and transmit the heated compressed air to a combustor, and the combustor is configured to combust synthesis gas output by the heat exchange purification device according to the output heated compressed air.
Furthermore, the device also comprises a renewable energy power generation device, a voltage converter, a control device and a gas storage tank, wherein the renewable energy power generation device is respectively and electrically connected with the control device, the voltage converter and the compressor, the gas storage tank is connected between the compressor and the oxygen generation device,
the control apparatus is configured to determine whether the amount of power generation by the renewable energy power generation device is larger than the obtained user required power usage; if the difference electric quantity is larger than the preset value, the compressor is powered according to the difference electric quantity so as to operate the compressor;
the compressor is configured to compress air and output the compressed air to an air tank for storage.
Further, the control apparatus is also configured to determine whether the amount of electricity generated by the renewable energy power generation device is larger than the obtained user required electricity usage; if the difference value is less than the preset value, the compressed air in the air storage tank is released to enter the combustor and the oxygen generation device respectively according to the difference value.
Further, an air pressure adjusting device is arranged between the air storage tank and the oxygen generating device.
Further, the oxygen generation device comprises an expansion refrigeration system and a precooling purification module, a main heat exchange module and a rectification module which are connected in sequence.
Further, the expansion turbine is connected to a heat pump or an absorption refrigerator.
The second aspect of the embodiment of the present application further provides an energy supply method, which is applied to an energy supply system, the system includes a coal gas making unit and an energy storage power generation unit, the coal gas making unit includes an oxygen generation device, a gasification furnace, a heat exchange purification device and a heat accumulator which are connected in sequence, the energy storage power generation unit includes a compressor, a combustor, an expansion turbine and a power generator which are connected in sequence, the energy storage power generation unit further includes a motor, the motor is connected with the compressor, the compressor is further connected with the oxygen generation device, the heat exchange purification device is further connected with the combustor, the expansion turbine is connected with the power generator, the method includes:
the motor is configured to drive the compressor to compress air to generate compressed air output;
preparing oxygen by an oxygen preparation device according to the compressed air, inputting the oxygen into a gasification furnace, and generating synthesis gas by the gasification furnace according to the oxygen and the input coal powder;
carrying the synthesis gas into a heat accumulator through a cooling medium by a heat exchange purification device;
the heat in the cooling medium is collected by the heat accumulator, and cooled synthesis gas is generated and fed back to the heat exchange purification device;
the cooled synthesis gas is purified and output by a heat exchange purification device,
the synthesis gas output by the heat exchange purification device is combusted through the combustor according to the output compressed air, so that the expansion turbine works to control the generator to generate electricity to provide electric energy for the compressor.
Further, the system also comprises a heater, the heater is connected with the heat accumulator, and the combustion of the synthesis gas output by the heat exchange purification device through the combustor according to the output compressed air comprises the following steps:
the compressed air in the heater is heated by the heat accumulator according to the collected heat and is transmitted to the combustor;
and the synthesis gas output by the heat exchange purification device is combusted by the combustor according to the output heated compressed air.
Furthermore, the system also comprises a renewable energy power generation device, a voltage converter, a control device and a gas storage tank, wherein the renewable energy power generation device is respectively and electrically connected with the control device, the voltage converter and the compressor, the gas storage tank is connected between the compressor and the oxygen generation device,
determining whether the generated energy of the renewable energy power generation device is larger than the obtained power consumption required by the user or not through the control equipment;
if the difference electric quantity is larger than the preset value, the compressor is powered according to the difference electric quantity so as to operate the compressor;
the air is compressed by the compressor and the compressed air is output to the air storage tank for storage.
The embodiment of the application adopts at least one technical scheme which can achieve the following beneficial effects: the energy storage power generation unit comprises a compressor, a combustor, an expansion turbine and a generator which are sequentially connected, and further comprises a motor, the motor is connected with the compressor, the compressor is also connected with an oxygen generation device, so that the motor is configured to drive the compressor to compress air to generate compressed air and output the compressed air; preparing oxygen by an oxygen preparation device according to the compressed air, inputting the oxygen into a gasification furnace, and generating synthesis gas by the gasification furnace according to the oxygen and the input coal powder; carrying the synthesis gas into a heat accumulator through a cooling medium by a heat exchange purification device; the heat in the cooling medium is collected by the heat accumulator, and cooled synthesis gas is generated and fed back to the heat exchange purification device; the cooled synthetic gas is purified and output through the heat exchange purification device, when the output synthetic gas quantity is larger than the gas consumption demand of a user, on one hand, the output cooled synthetic gas can be used as coal gas for the user, on the other hand, the synthetic gas output by the heat exchange purification device is combusted through the combustor according to the output compressed air, so that the expansion turbine works to control the generator to generate electricity, on the one hand, the compressor provides electric energy, then the compressor can continue to compress the air, so that the coal gas unit generates the synthetic gas, and on the other hand, the electric energy generated by the generator can also supply electricity for the user; moreover, the heat accumulator can output the collected heat to provide heat energy for users, thereby realizing the gradient utilization of energy, having high energy utilization rate, reducing the environmental pollution caused by the burning of scattered coal, saving energy and protecting environment.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
fig. 1 is a block diagram of an energy supply system according to an embodiment of the present disclosure;
FIG. 2 is a block diagram of a heat exchange purification apparatus according to an embodiment of the present disclosure;
fig. 3 is a block diagram of an energy supply system according to an embodiment of the present disclosure;
fig. 4 is a block diagram of an energy supply system according to an embodiment of the present disclosure;
fig. 5 is a flowchart of an energy supply method according to an embodiment provided in the present application;
fig. 6 is a detailed flowchart of S56 in fig. 5;
fig. 7 is a flowchart of S71-S73 of an energy supply method according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail and completely with reference to the following specific embodiments of the present application and the accompanying drawings. It should be apparent that the described embodiments are only some of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The technical solutions provided by the embodiments of the present application are described in detail below with reference to the accompanying drawings.
Referring to fig. 1, an embodiment of the present application provides an energy supply system, which includes a coal gas generating unit and an energy storage and power generation unit. The coal gas production unit comprises an oxygen production device 103, a gasification furnace 104, a heat exchange purification device 105 and a heat accumulator 106 which are connected in sequence, and the energy storage power generation unit comprises a compressor 101, a combustor 108, an expansion turbine 109 and a power generator 110 which are connected in sequence. The energy storage power generation unit further comprises an electric motor 119, the electric motor 119 is connected with the compressor 101, the compressor 101 is further connected with the oxygen generating device 103, the heat exchange purification device 105 is further connected with the combustor 108, and the expansion turbine 109 is connected with the generator 110. In addition, the gasification furnace 104 may be externally connected to a pulverized coal manufacturing apparatus, and the pulverized coal manufacturing apparatus may manufacture the input coal raw material into pulverized coal and input the pulverized coal into the gasification furnace 104.
Optionally, as shown in fig. 2, the oxygen production apparatus 103 includes an expansion refrigeration system 118, and a pre-cooling purification module 114, a main heat exchange module 115, and a rectification module 116 connected in sequence. It can be understood that, since the oxygen generation device 103 obtains the compressed air output by the compressor 101, it is not necessary to include a compression module to compress the air, which can reduce the power consumption of the oxygen generation device 103, even reduce the power consumption of the coal gas generation unit greatly.
The motor 119 is configured to drive the compressor 101 to compress air to generate compressed air, the oxygen generator 103 is configured to generate oxygen from the compressed air, the oxygen is input to the gasifier 104, and the gasifier 104 is configured to generate synthesis gas from the oxygen and the input pulverized coal.
The gasification furnace 104 burns pulverized coal sufficiently under certain conditions according to oxygen to generate chemical reaction to generate synthesis gas carrying impurities, and the output synthesis gas carrying impurities has high temperature and can be purified only by cooling.
The heat exchanging purification device 105 is configured to carry the synthesis gas into the heat accumulator 106 through a cooling medium, the heat accumulator 106 is configured to collect heat in the cooling medium, and generate cooled synthesis gas to feed back to the heat exchanging purification device 105, and the heat exchanging purification device 105 is further configured to purify and output the cooled synthesis gas.
It is understood that the syngas fed back to the heat exchange purifier 105 still carries impurities, for example, gas impurities such as CnHm, sulfide, N2, tar, naphtha, phenol and ammonia, so that the heat exchange purifier 105 is required to filter and purify the impurities, and the purified syngas is available for use.
The combustor 108 is configured to combust the syngas output from the heat exchanging and purifying device 105 according to the output compressed air, so that the expansion turbine 109 does work to control the generator 110 to generate electricity to provide electric energy for the compressor 101.
Because the compressed air carries oxygen, the combustion of the syngas can rely on the compressed air for combustion, and the generated heat energy enables the expansion turbine 109 to work to control the generator 110 to generate electricity.
In addition, the heat exchange purification device 105 can also be connected with an absorption heat pump or an absorption refrigerator. The exhaust steam of the expansion turbine 109 can be subjected to energy conversion by an absorption heat pump to provide heat energy for users; or the energy is converted by the absorption refrigerator to provide cold energy for users, and the cold energy and the heat energy can be supplemented by electric refrigeration and heating when the generated cold energy and heat energy are insufficient.
The energy supply system provided by the embodiment of the application can realize the following functions and effects during operation: because the energy storage power generation unit comprises a compressor 101, a combustor 108, an expansion turbine 109 and a generator 110 which are connected in sequence, and the motor 119 is connected with the compressor 101, the compressor 101 is also connected with the oxygen generation device 103, so that the motor 119 is configured to drive the compressor 101 to compress air to generate compressed air for output; preparing oxygen from the compressed air by an oxygen generator 103, inputting the oxygen into a gasifier 104, wherein the gasifier 104 is configured to generate synthesis gas from the oxygen and the input pulverized coal; the synthesis gas is carried into a heat accumulator 106 through a cooling medium by a heat exchange purification device 105; the heat in the cooling medium is collected by the heat accumulator 106, and cooled synthesis gas is generated and fed back to the heat exchange purification device 105; the cooled synthesis gas is purified and output by the heat exchange purification device 105, when the output synthesis gas amount is larger than the gas consumption demand of a user, on one hand, the output cooled synthesis gas can be used as coal gas by the user, on the other hand, the synthesis gas output by the heat exchange purification device 105 is combusted by the combustor 108 according to the output compressed air, so that the expansion turbine 109 does work to control the generator 110 to generate electricity, on the one hand, the electric energy is provided for the compressor 101, then the compressor 101 can continue to compress the air, so that the synthesis gas is generated by the coal gas production unit, on the other hand, the electric energy generated by the generator 110 can also be used for supplying electricity to the user, furthermore, the heat accumulator 106 can output the collected heat, provide heat energy for the user, realize energy gradient utilization, have high energy utilization rate, reduce the environmental pollution caused by the combustion of scattered coal, save energy and protect environment.
Optionally, as shown in fig. 3, the energy supply system further includes a heater 107, the heater 107 is connected to the heat accumulator 106, the heat accumulator 106 is further configured to heat the compressed air in the heater 107 according to the collected heat and transmit the heated compressed air to the combustor 108, and the combustor 108 is configured to combust the synthesis gas output by the heat exchange purification device 105 according to the output heated compressed air. It can be understood that, by combusting the synthesis gas output by the heat exchange purification device 105 according to the heated compressed air, the fuel of the combustor 108 can be reduced (the heating process is short), and the compressed air in the heater 107 is heated according to the collected heat, thereby further improving the energy utilization rate.
Optionally, as shown in fig. 4, the energy supply system further includes a renewable energy power generation device 111, a voltage converter 113, a control device 112, and an air tank 102, the renewable energy power generation device 111 is electrically connected to the control device 112, the voltage converter 113, and the compressor 101, respectively, and the air tank 102 is connected between the compressor 101 and the oxygen generation device 103. The renewable energy power generator 111 may be a wind power generator, a solar power generator, or the like, but is not limited thereto.
The control apparatus 112 is configured to determine whether the amount of power generation by the renewable energy power generation device 111 is larger than the obtained user required power usage; if the difference electric quantity is larger than the preset value, the compressor 101 is powered according to the difference electric quantity so as to enable the compressor 101 to operate;
the compressor 101 is configured to compress air and output the compressed air to the air tank 102 for storage.
The surplus electric quantity generated by the renewable energy power generation device 111 can be converted into chemical energy to be stored in the gas storage tank 102, so that the utilization rate of energy is further improved.
Optionally, the control apparatus 112 is further configured to determine whether the amount of electricity generated by the renewable energy power generation device 111 is larger than the obtained user required electricity usage; if the difference electric quantity is smaller than the preset value, the compressed air discharged from the air storage tank 102 respectively enters the combustor 104 and the oxygen generation device 103. The heat energy, the coal gas and the electric energy are generated by the coal gas making unit and the energy storage and power generation unit.
The principle is as follows: when the power generation amount of the renewable energy power generation device 111 is insufficient, the compressed air in the air storage tank 102 can be released to the combustor 104, and then the expansion turbine 109 drives the generator to do work to provide electric energy.
Optionally, as shown in fig. 4, an air pressure adjusting device 117 is disposed between the air storage tank 102 and the oxygen generating device 103, and the volume of the compressed air released into the oxygen generating device 103 from the air storage tank 102 can be adjusted by the air pressure adjusting device 117, so as to control the amount of the output heat energy, coal gas and electric energy.
Referring to fig. 5, an embodiment of the present application further provides an energy supply method applied to an energy supply system. The system comprises a coal gas making unit and an energy storage power generation unit, wherein the coal gas making unit comprises an oxygen making device 103, a gasification furnace 104, a heat exchange purification device 105 and a heat accumulator 106 which are sequentially connected. The energy storage power generation unit comprises a compressor 101, a combustor 108, an expansion turbine 109 and a generator 110 which are sequentially connected, the energy storage power generation unit further comprises a motor 119, the motor 119 is connected with the compressor 101, the compressor 101 is further connected with an oxygen generation device 103, a heat exchange purification device 105 is further connected with the combustor 108, and the generator 110 is connected with the expansion turbine 109. The method comprises the following steps:
s51: the motor 119 drives the compressor 101 to compress air to generate compressed air for output.
S52: the oxygen produced by the oxygen production apparatus 103 from the compressed air is input to the gasification furnace 104, and the gasification furnace 104 is configured to generate a synthesis gas from the oxygen and the charged pulverized coal.
Specifically, the oxygen generator 103 may be an expansion refrigeration system and include a pre-cooling purification module, a main heat exchange module, and a rectification module connected in sequence.
S53: the heat of the syngas is carried by the cooling medium into the regenerator 106 via the heat exchange purification unit 105.
S54: the heat in the cooling medium is collected by the heat accumulator 106, and the cooled synthesis gas is fed back to the heat exchange purification device 105.
S55: the cooled synthesis gas is purified and output through the heat exchange purification device 105.
S56: the synthesis gas output by the heat exchange purification device 105 is combusted through the combustor 108 according to the output compressed air, so that the expansion turbine 109 does work to control the generator 110 to generate electricity to provide electric energy for the compressor 101.
In addition, a heat pump or an absorption refrigerator is connected to the expansion turbine 109.
Optionally, the control device 112 is further configured to determine whether the amount of electricity generated by the renewable energy power generation apparatus 111 is larger than the obtained user required electricity usage amount; if the difference electric quantity is less than the preset value, the compressed air discharged from the air storage tank 102 respectively enters the combustor 108 and the oxygen generating device 103.
In addition, an air pressure adjusting device can be arranged between the air storage tank 102 and the oxygen generating device 103.
According to the energy supply method provided by the embodiment of the application, the energy storage power generation unit comprises a compressor 101, a combustor 108, an expansion turbine 109 and a generator 110 which are sequentially connected, a motor 119 is connected with the compressor 101, the compressor 101 is also connected with an oxygen generation device 103, the generator 110 is connected with the expansion turbine 109, and the motor 119 drives the compressor 101 to compress air to generate compressed air for output; preparing oxygen from the compressed air by an oxygen generator 103, inputting the oxygen into a gasifier 104, wherein the gasifier 104 is configured to generate synthesis gas from the oxygen and the input pulverized coal; the synthesis gas is carried into a heat accumulator 106 through a cooling medium by a heat exchange purification device 105; the heat in the cooling medium is collected by the heat accumulator 106, and cooled synthesis gas is generated and fed back to the heat exchange purification device 105; the cooled synthesis gas is purified and output by the heat exchange purification device 105, when the output synthesis gas amount is larger than the gas consumption demand of a user, on one hand, the output cooled synthesis gas can be used as coal gas by the user, on the other hand, the synthesis gas output by the heat exchange purification device 105 is combusted by the combustor 108 according to the output compressed air, so that the expansion turbine 109 does work to control the generator 110 to generate electricity, on the one hand, the electric energy is provided for the compressor 101, then the compressor 101 can continue to compress the air, so that the synthesis gas is generated by the coal gas production unit, on the other hand, the electric energy generated by the generator 110 can also be used for supplying electricity for the user, furthermore, the heat accumulator 106 can output the collected heat, heat energy is provided for the user, the energy gradient utilization is realized, the energy utilization rate is high, the environmental pollution caused by the combustion of scattered coal is reduced, and.
Optionally, the system further includes a heater 107, the heater 107 is connected to the thermal accumulator 106, as shown in fig. 6, S56 includes:
s61: the compressed air in the heater 107 is heated by the regenerator 106 based on the collected heat and is delivered to the combustor 107.
S62: the synthesis gas output from the heat exchange purification device 105 is combusted by the combustor 108 according to the output heated compressed air.
Optionally, the system further comprises a renewable energy power generation device 111, a voltage converter 113, a control device 112 and a gas storage tank 102, wherein the renewable energy power generation device 111 is electrically connected with the control device 112, the voltage converter 113 and the motor 119 respectively, and the gas storage tank 102 is connected between the compressor 101 and the oxygen generation device 103. As shown in fig. 7, the method further comprises:
s71: it is determined via the control apparatus 112 whether the amount of electricity generated by the renewable energy power generation device 111 is larger than the obtained user-required electricity usage amount.
S72: if so, the compressor 101 is powered to operate the compressor 101 according to the delta power.
S73: the air is compressed by the compressor 101 and the compressed air is output to the air tank 102 for storage.
Wherein, the sequence of S71-S73 and S51-S56 is not provided.
In short, the above description is only a preferred embodiment of the present application, and is not intended to limit the scope of the present application. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, for the system embodiment, since it is substantially similar to the method embodiment, the description is simple, and for the relevant points, reference may be made to the partial description of the method embodiment.
Claims (6)
1. An energy supply system is characterized by comprising a coal gas unit and an energy storage power generation unit, wherein the coal gas unit comprises an oxygen generation device, a gasification furnace, a heat exchange purification device and a heat accumulator which are sequentially connected, the energy storage power generation unit comprises a compressor, a combustor, an expansion turbine and a power generator which are sequentially connected, the energy storage power generation unit further comprises a motor, the motor is connected with the compressor, the compressor is also connected with the oxygen generation device, the heat exchange purification device is also connected with the combustor, the expansion turbine is connected with the power generator,
wherein the motor is configured to drive the compressor to compress air to generate compressed air output, the oxygen generation device is configured to prepare oxygen from the compressed air input to the gasifier, and the gasifier is configured to generate syngas from the oxygen and the input pulverized coal;
the heat exchange purification device is configured to carry the synthesis gas into a heat accumulator through a cooling medium, the heat accumulator is configured to collect heat in the cooling medium, generate cooled synthesis gas to feed back to the heat exchange purification device, and the heat exchange purification device is further configured to purify and output the cooled synthesis gas,
the combustor is configured to combust the synthesis gas output by the heat exchange and purification device according to the output compressed air so that the expansion turbine does work to control the generator to generate power and provide electric energy for the compressor;
the energy supply system also comprises a renewable energy power generation device, a voltage converter, a control device and a gas storage tank, wherein the renewable energy power generation device is respectively electrically connected with the control device, the voltage converter and the motor, and the gas storage tank is connected between the compressor and the oxygen generation device;
the control apparatus is configured to determine whether or not an amount of power generation by the renewable energy power generation device is larger than an obtained user required power usage amount; if the difference electric quantity is larger than the preset value, supplying power to the compressor according to the difference electric quantity so as to enable the compressor to operate;
the compressor is configured to compress air and output compressed air to the air reservoir for storage;
the control apparatus is further configured to determine whether the amount of electricity generated by the renewable energy power generation device is larger than the obtained user required electricity usage amount; if the difference electric quantity is less than the preset value, releasing the compressed air in the air storage tank to enter the combustor and the oxygen generation device respectively according to the difference electric quantity;
an air pressure adjusting device is arranged between the air storage tank and the oxygen generating device.
2. The energy supply system according to claim 1, further comprising a heater connected to the heat accumulator, wherein the heat accumulator is further configured to heat compressed air in the heater according to the collected heat and transmit the heated compressed air to the burner, and wherein the burner is configured to burn the syngas output by the heat exchanging and purifying device according to the output heated compressed air.
3. The energy supply system of claim 1, wherein the oxygen generator comprises an expansion refrigeration system and a pre-cooling purification module, a main heat exchange module and a rectification module which are connected in sequence.
4. The energy supply system according to claim 1, wherein said expansion turbine is further connected to a heat pump or an absorption refrigerator.
5. The energy supply method is characterized by being applied to an energy supply system, the system comprises a coal gas making unit and an energy storage power generation unit, the coal gas making unit comprises an oxygen generation device, a gasification furnace, a heat exchange purification device and a heat accumulator which are sequentially connected, the energy storage power generation unit comprises a compressor, a combustor, an expansion turbine and a generator which are sequentially connected, the energy storage power generation unit further comprises a motor, the motor is connected with the compressor, the compressor is further connected with the oxygen generation device, the heat exchange purification device is further connected with the combustor, and the expansion turbine is connected with the generator, and the method comprises the following steps:
the motor drives the compressor to compress air to generate compressed air for output;
preparing oxygen from the compressed air via the oxygen generation device and inputting the oxygen into the gasifier, wherein the gasifier is configured to generate synthesis gas from the oxygen and the input pulverized coal;
the synthesis gas is carried into the heat accumulator through the cooling medium by the heat exchange purification device;
the heat in the cooling medium is collected by the heat accumulator, and cooled synthesis gas is generated and fed back to the heat exchange purification device;
purifying and outputting the cooled synthesis gas through the heat exchange purification device;
the synthesis gas output by the heat exchange purification device is combusted through the combustor according to the output compressed air, so that the expansion turbine does work to control the generator to generate power and provide electric energy for the compressor;
the energy supply system also comprises a renewable energy power generation device, a voltage converter, a control device, a gas storage tank and a gas pressure adjusting device, wherein the renewable energy power generation device is respectively and electrically connected with the control device, the voltage converter and the motor, the gas storage tank is connected between the compressor and the oxygen generation device, and the gas pressure adjusting device is connected between the gas storage tank and the oxygen generation device;
determining whether the generated energy of the renewable energy power generation device is larger than the obtained power consumption required by the user through the control equipment;
if the difference electric quantity is larger than the preset value, supplying power to the compressor according to the difference electric quantity so as to enable the compressor to operate;
compressing the air by the compressor, and outputting the compressed air to the air storage tank for storage;
if the difference electric quantity is smaller than the preset value, the compressed air in the air storage tank is released according to the difference electric quantity to respectively enter the combustor and the oxygen generation device.
6. The energy supply method according to claim 5, wherein the system further comprises a heater connected to the regenerator, and the combusting the synthesis gas output from the heat exchange purification device by the combustor according to the output compressed air comprises:
the compressed air in the heater is heated by the heat accumulator according to the collected heat and is transmitted to the combustor;
and the synthesis gas output by the heat exchange purification device is combusted by the combustor according to the output heated compressed air.
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| CN102518516A (en) * | 2011-12-14 | 2012-06-27 | 华北电力大学 | Integral compressed air energy storage and coal gasification power generation system and integrated power generation method |
| CN106285944A (en) * | 2016-09-13 | 2017-01-04 | 中国华能集团公司 | A kind of IGCC peak-load regulation device and method utilizing space division system energy storage |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102518516A (en) * | 2011-12-14 | 2012-06-27 | 华北电力大学 | Integral compressed air energy storage and coal gasification power generation system and integrated power generation method |
| CN106285944A (en) * | 2016-09-13 | 2017-01-04 | 中国华能集团公司 | A kind of IGCC peak-load regulation device and method utilizing space division system energy storage |
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