CN114977238A - Wind power photovoltaic coupling liquid oxygen molten iron bath gasification gas energy storage power generation system - Google Patents

Wind power photovoltaic coupling liquid oxygen molten iron bath gasification gas energy storage power generation system Download PDF

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CN114977238A
CN114977238A CN202210769244.0A CN202210769244A CN114977238A CN 114977238 A CN114977238 A CN 114977238A CN 202210769244 A CN202210769244 A CN 202210769244A CN 114977238 A CN114977238 A CN 114977238A
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molten iron
iron bath
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CN114977238B (en
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牛强
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Hangzhou Jiman Iron Hydrogen Energy Technology Co ltd
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Hangzhou Jiman Iron Hydrogen Energy Technology Co ltd
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/28—Arrangements for balancing of the load in a network by storage of energy
    • 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
    • C10J3/57—Gasification using molten salts or metals
    • 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
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D9/00—Adaptations of wind motors for special use; Combinations of wind motors with apparatus driven thereby; Wind motors specially adapted for installation in particular locations
    • F03D9/007—Adaptations of wind motors for special use; Combinations of wind motors with apparatus driven thereby; Wind motors specially adapted for installation in particular locations the wind motor being combined with means for converting solar radiation into useful energy
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
    • F03D—WIND MOTORS
    • F03D9/00—Adaptations of wind motors for special use; Combinations of wind motors with apparatus driven thereby; Wind motors specially adapted for installation in particular locations
    • F03D9/10—Combinations of wind motors with apparatus storing energy
    • F03D9/18—Combinations of wind motors with apparatus storing energy storing heat
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/381—Dispersed generators
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
    • H02J2300/20—The dispersed energy generation being of renewable origin
    • H02J2300/22—The renewable source being solar energy
    • H02J2300/24—The renewable source being solar energy of photovoltaic origin
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
    • H02J2300/20—The dispersed energy generation being of renewable origin
    • H02J2300/28—The renewable source being wind energy
    • 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
    • Y02P80/00—Climate change mitigation technologies for sector-wide applications
    • Y02P80/20—Climate change mitigation technologies for sector-wide applications using renewable energy

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Power Engineering (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Engine Equipment That Uses Special Cycles (AREA)

Abstract

The invention relates to a wind power photovoltaic coupling liquid oxygen molten iron bath gasification fuel gas energy storage power generation system, which comprises a wind power photovoltaic integrated power station, a molten iron bath pure oxygen gasification system and a fuel gas power generation unit; the wind power photovoltaic integrated power station is connected into a public power grid to supply power externally, and internal power supply is carried out through an internal power supply dispatching station; the inner power supply dispatching station is respectively connected with a deep cooling air separation unit, a material crushing unit and an electric heating drying baking furnace; when sufficient wind and light resources exist, a deep cooling air separation unit is started according to the requirement by utilizing the redundant electric power of the wind power and photovoltaic integrated power station, and liquid oxygen, a material crushing unit and an electric heating drying baking furnace are stored for energy; and when no wind-light resource exists, starting the molten iron bath pure oxygen gasification system as required to generate electricity by using the stored energy. The invention has the advantages of effectively utilizing redundant power of the wind power and photovoltaic integrated power station and realizing the durable and stable power supply to the external power grid.

Description

Wind power photovoltaic coupling liquid oxygen molten iron bath gasification gas energy storage power generation system
Technical Field
The invention relates to the technical field of energy, in particular to a wind power photovoltaic coupling liquid oxygen molten iron bath gasification fuel gas energy storage power generation system.
Background
Photovoltaic wind power fluctuation is large, and peak clipping and valley filling of external power supply are required to be achieved through energy storage. The pumped storage needs a special place, the lithium power battery energy storage investment cost is high, large-scale realization cannot be realized, and the fire hazard risk is great. The regeneration efficiency of hydrogen production by water electrolysis is low and cannot be borne economically. Other natural conditions such as compressed air energy storage and the like require a cave with huge volume. The liquefied air energy storage has the problems of low efficiency, additional supplementary heat source and the like.
At present, the power generation of a photovoltaic wind power complementary type comprehensive power station is only less than 3000 hours every year, the power demand always exists in 8760 hours all the year round, the gap is as high as more than 5000 hours, and stable power supply is difficult to form. Other existing energy storage modes have the problems of high manufacturing cost, low efficiency, high cost, dependence on special natural geographic environment and the like, so that the wind power photovoltaic power station becomes unstable garbage electricity and cannot support external stable power supply of photovoltaic wind power.
Therefore, a wind power photovoltaic coupling liquid oxygen molten iron bath gasification gas energy storage power generation system which effectively utilizes unstable garbage electricity and realizes the permanent and stable power supply to an external network is urgently needed.
Disclosure of Invention
The invention aims to provide a wind power photovoltaic coupling liquid oxygen molten iron bath gasification fuel gas energy storage power generation system aiming at the problems in the prior art.
In order to realize the purpose of the invention, the invention adopts the following technical scheme: the wind power photovoltaic coupling liquid oxygen molten iron bath gasification gas energy storage power generation system is applied to an energy storage type comprehensive power generation system with peak clipping and valley filling, and comprises a wind power photovoltaic comprehensive power station, a molten iron bath pure oxygen gasification system and a gas power generation unit;
the wind power photovoltaic integrated power station is connected into a public power grid to supply power externally, and internal power supply is carried out through an internal power supply dispatching station;
the inner power supply dispatching station is respectively connected with a deep cooling air separation unit, a material crushing unit and an electric heating drying baking furnace;
when sufficient wind and light resources exist, a deep cooling air separation unit, a material crushing unit and an electric heating drying baking furnace are started to store energy according to needs by utilizing redundant electric power of a wind power and photovoltaic integrated power station; when no wind and light resources exist, starting a molten iron bath pure oxygen gasification system as required to generate synthesis gas, and generating power by using the synthesis gas;
the cryogenic air separation equipment is used for preparing liquid oxygen by utilizing surplus green electricity and storing the liquid oxygen into the liquid oxygen storage tank when sufficient wind and light resources exist, gasifying the liquid oxygen in the liquid oxygen storage tank when no wind and light resources exist, and inputting oxygen with pressure into the molten iron bath gasification furnace to be used as a gasifying agent; the method comprises the following steps that oxygen with pressure is heated and heated before being input into a molten iron bath gasification furnace, then electricity is generated through an air turbine generator set, and electricity generated by the air turbine generator set is input into the public power grid through an external power supply dispatching station;
the material crushing unit is used for crushing the organic solid wastes and storing the organic solid wastes into a solid material storage tank when sufficient wind and light resources exist;
the electric heating drying and baking furnace is used for drying and baking materials when sufficient wind and light resources exist and storing the materials into a solid material storage tank;
the materials in the solid material storage tank and the oxygen with pressure after liquid oxygen gasification are used for gasifying the molten iron bath pure oxygen gasification system to prepare synthetic fuel gas in the absence of wind and light resources, and fuel gas power generation is carried out through the fuel gas power generation unit, and the electricity generated by the molten iron bath pure oxygen gasification system is input to a public power grid.
The working principle and the beneficial effects are as follows: 1. compared with the prior art, when the wind-solar power station works, except for external power supply, part of redundant power is used for cryogenic air separation to prepare liquid oxygen, microwave method drying and baking of organic solid wastes, electric thermal pyrolysis of the organic solid wastes and the like. The method is characterized in that redundant electric power is converted into high-energy-carrying materials such as liquid oxygen, dry and crushed solid waste materials and pyrolysis oil, when the wind-solar power station stops operating, organic solid waste and liquid oxygen are gasified and injected into a molten iron bath gasification furnace to generate synthesis gas and convert the synthesis gas into hydrogen, the synthesis gas and the hydrogen are used for gas turbine power generation, internal combustion engine power generation and fuel cell power generation, the external network is powered stably and durably, the annual power supply time reaches 7000 plus 8000 hours, the problem that garbage electricity of the existing wind-power photovoltaic comprehensive power station cannot be utilized is thoroughly solved, the energy utilization rate is remarkably improved, the organic solid waste can be treated, and the method is more environment-friendly and energy-saving;
2. compared with the prior art, the power supply system has the advantages that long-term stable power supply is realized, the comprehensive power generation cost is obviously reduced, most of newly generated electric energy is established on the basis of effectively utilizing 'garbage electricity', and negative carbon emission of power generation can be realized by implementing CCUS (carbon capture, utilization and sequestration), so that the trend of carbon emission reduction at present is met.
Further, interior power supply dispatch station still is connected with the pyrolysis oven, and this pyrolysis oven is used for carrying out the pyrolysis to the material after the electric heat drying roaster is handled to obtain pyrolysis oil and pyrolysis semicoke, this pyrolysis oil storage to pyrolysis oil tank, this pyrolysis semicoke storage to solid material storage tank. According to the arrangement, the dried and baked materials are subjected to electric heating medium-low temperature pyrolysis at 390-.
Further, the molten iron bath pure oxygen gasification system comprises a molten iron bath gasification furnace for gasifying materials, pyrolysis semicoke and pyrolysis oil to generate synthesis gas, an oxygen lance for charging oxygen into the molten iron bath gasification furnace, and a material spray gun for inputting materials into the molten iron bath gasification furnace. According to the arrangement, the synthesis gas is produced by cracking and gasifying organic solid wastes and other materials in the current mature molten iron bath, so that the subsequent gas power generation unit can perform gas power generation, the heat energy recovered in the synthesis gas treatment process can be reused, and the energy utilization rate is effectively improved.
Furthermore, the gas power generation unit comprises a first waste heat boiler connected with a synthesis gas outlet of the molten iron bath gasification furnace, a first steam turbine power generation unit used for recovering heat of the first waste heat boiler to generate power, a gas turbine power generation unit and an internal combustion power generation unit used for generating power through the synthesis gas, a steam conversion unit used for carrying out steam conversion reaction on the synthesis gas to generate hydrogen and carbon dioxide, a carbon dioxide removal unit used for absorbing the carbon dioxide to prepare hydrogen, a hydrogen purification unit used for purifying the hydrogen, a proton membrane hydrogen fuel cell stack and a high-temperature fuel cell stack used for generating power through the hydrogen, and electricity generated by the first steam turbine power generation unit, the gas turbine power generation unit, the internal combustion power generation unit, the proton membrane hydrogen fuel cell stack and the high-temperature fuel cell stack is input to a public power grid through an external power supply dispatching station. According to the arrangement, heat energy is continuously recovered in the process of treating the synthesis gas, hydrogen and carbon dioxide are separated, carbon dioxide is recovered, power generation is carried out by utilizing hydrogen, and the negative carbon emission of power generation can be realized.
Further, molten iron bath pure oxygen gasification system still carries out the pyrolysis oil heat exchanger of heat transfer and is used for carrying out the pyrolysis oil booster pump of heat transfer with pyrolysis oil pressure boost input to pyrolysis oil heat exchanger in the pyrolysis oil jar, and this pyrolysis oil adds to the molten iron bath gasifier and carries out pyrolysis gasification after the heat is retrieved to pyrolysis oil heat exchanger heat transfer. The device effectively utilizes the pyrolysis oil, makes full use of substances generated by each part, obviously improves the energy utilization rate, and is more environment-friendly.
Furthermore, the gas power generation unit also comprises a second waste heat boiler for recovering the gas turbine generator set and a second steam turbine generator set connected with the second waste heat boiler, and the electricity of the second steam turbine generator set is also input to the public power grid through an external power supply dispatching station. This setting, again, has further improved energy utilization.
Furthermore, the power generation mode of the synthetic gas comprises the power generation of an internal combustion engine directly burning the synthetic gas, the power generation of a gas turbine of the high-pressure synthetic gas, the power generation of a high-temperature fuel cell stack of the crude hydrogen after hydrogen production and decarbonization through steam conversion, and the power generation of a proton membrane fuel cell stack after purification of the crude hydrogen. The gas power generation is carried out through various modes, the energy utilization rate is effectively improved, and the stable power supply of the wind power photovoltaic integrated power station is ensured.
Further, the internal combustion generator set is connected with an internal combustion engine waste heat recovery device, and waste heat is recovered to be used as a heat source to be supplied to gasified high-pressure oxygen and high-pressure nitrogen for heat compensation, so that the energy conversion efficiency of air turbine power generation is improved. This setting, again, has further improved energy utilization.
The system further comprises a liquid nitrogen storage tank connected with the cryogenic air separation unit, liquid nitrogen is prepared and stored in the liquid nitrogen storage tank when sufficient wind and light resources exist, liquid nitrogen in the liquid nitrogen storage tank is gasified, heated and warmed when no wind and light resources exist, then power is generated through a second gas turbine generator set, and electricity generated by the second gas turbine generator set is input to a public power grid through an external power supply dispatching station. This setting, again, has further improved energy utilization.
And further, the low-temperature crushing system comprises a liquid nitrogen storage tank, a liquid nitrogen valve, a liquid nitrogen booster pump, a liquid nitrogen crusher, a low-temperature nitrogen crusher, a dust remover, a second air heat exchanger gasifier, a second primary heater, a second secondary heater, a second gas turbine generator set and a high-pressure nitrogen buffer tank which are sequentially arranged, and the crushed material part of the low-temperature liquid nitrogen and the low-temperature nitrogen is used as a gasification raw material of the molten iron bath gasifier. This setting, again, has further improved energy utilization.
Drawings
FIG. 1 is a schematic structural diagram of a power distribution part of a wind power and photovoltaic integrated power station;
FIG. 2 is a schematic structural view of a molten iron bath pure oxygen gasification system and a gas power generation unit;
FIG. 3 is a schematic diagram of the operation of a wind power and photovoltaic integrated power station when sufficient wind and light resources exist;
FIG. 4 is a schematic diagram of the operation of a molten iron bath pure oxygen gasification system and a fuel gas power generation unit when sufficient wind and light resources exist (in an off-state);
FIG. 5 is a schematic diagram of the operation of the wind power and photovoltaic integrated power station when wind and solar resources are insufficient;
FIG. 6 is a schematic diagram (working state) of the molten iron bath pure oxygen gasification system and the gas power generation unit when the wind and light resources are insufficient;
fig. 7 is a schematic view of the structure of the cryogenic pulverizing system.
In the figure, 101, a wind power and photovoltaic integrated power station; 102. a distribution substation; 103. an external power supply dispatching station; 104. an internal power supply dispatching station; 105. a public power grid; 201. a cryogenic air separation unit; 202. a material crusher set; 203. an electric heating drying furnace; 204. a pyrolysis furnace; 205. a pyrolysis gas phase condenser; 206. a pyrolysis oil tank; 207. a condensed sewage tank; 208. a pyrolysis gas storage tank; 209. pyrolyzing the semicoke; 210. a liquid oxygen storage tank; 211. a liquid oxygen valve; 212. a liquid oxygen booster pump; 213. a first air heat exchange vaporizer; 214. a first primary heater; 215. a first secondary heater; 216. a first gas turbine power generator set; 217. a second gas turbine power generator set; 220. a liquid nitrogen storage tank; 221. a liquid nitrogen valve; 222. a liquid nitrogen booster pump; 223. a second air heat exchange vaporizer; 224. a second stage heater; 225. a second secondary heater; 301. a molten iron bath gasifier; 302. a high pressure oxygen storage tank; 303. a solid material storage tank; 304. an oxygen lance lifting mechanism; 305. a material gun lifting mechanism; 306. an oxygen lance; 307. a material spray gun; 312. a first exhaust-heat boiler; 313. a steam conversion unit; 314. a carbon dioxide removal unit; 315. a carbon dioxide storage tank; 316. a high temperature fuel cell stack; 317. a hydrogen purification unit; 318. a proton membrane hydrogen fuel cell stack; 319. a DC inverter; 320. a first steam turbine generator set; 321. a gas turbine power generation unit; 322. a second exhaust-heat boiler; 323. a second steam turbine generator set; 324. an internal combustion generator set; 325. a waste heat recovery device of the internal combustion engine; 330. a high pressure nitrogen buffer tank; 331. a pyrolysis oil booster pump; 332. a pyrolysis oil heat exchanger; 333. a pyrolysis oil injection pipe; 340. intermediate-temperature waste heat; 345. high-temperature waste heat; 401. a low temperature nitrogen pulverizer; 402. a dust remover; 403. a liquid nitrogen pulverizer; 410. a rubber coarse particle bin; 411. feeding the rubber micro powder into a tank; 412. feeding the rubber micropowder to a tank; 413. a rubber ultramicro powder tank.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments that can be derived by one of ordinary skill in the art from the embodiments given herein are intended to be within the scope of the present invention.
It will be understood by those skilled in the art that in the present disclosure, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for ease of description and simplicity of description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus, the above terms should not be construed as limiting the present invention.
Aiming at the problems that the power generation of the conventional photovoltaic wind power complementary type comprehensive power station is only less than 3000 hours every year, the power demand always exists in 8760 hours all the year round, the gap is as high as more than 5000 hours, and stable power supply is difficult to form. Other existing energy storage modes have the problems of high manufacturing cost, low efficiency, high cost, dependence on special natural geographic environment and the like, so that the wind power photovoltaic power station becomes unstable garbage electricity and cannot support the external stable power supply of photovoltaic wind power.
The invention provides a microwave method for drying and baking organic solid waste, electrothermal pyrolysis of organic solid waste and the like by using part of redundant electric power for cryogenic air separation to prepare liquid oxygen. The method is characterized in that redundant electric power is converted into high-energy-carrying materials such as liquid oxygen, dry and broken solid waste materials and pyrolysis oil, when the wind-solar power station stops operating, organic solid waste and liquid oxygen are gasified and sprayed into the molten iron bath gasification furnace 301, synthesis gas is generated and converted into hydrogen, the synthesis gas and the hydrogen are used for gas turbine power generation, internal combustion engine power generation and fuel cell power generation, the external network is powered for lasting and stable power supply, and the technical scheme that the annual power supply hour reaches 7000 plus 8000 hours is realized. The method comprises the following specific steps:
as shown in fig. 1 and fig. 2, the wind power photovoltaic coupling liquid-iron-oxygen molten bath gasification gas energy storage power generation system is applied to an energy storage type integrated power generation system with peak clipping and valley filling, and comprises a wind power photovoltaic integrated power station 101, a molten iron bath pure oxygen gasification system and a gas power generation unit;
the wind power and photovoltaic integrated power station 101 is connected to a public power grid 105 to supply power to the outside, and meanwhile, internal power supply is carried out through an internal power supply dispatching station 104;
in this embodiment, electricity generated by the wind power and photovoltaic integrated power station 101 is connected to the distribution substation 102, the distribution substation 102 is dispatched by the distribution substation 102, the distribution substation 102 is respectively connected to the internal power supply dispatching station 104 and the external power supply dispatching station 103, the external power supply dispatching station 103 is connected to the public power grid 105 to supply power to the outside, and the internal power supply dispatching station 104 is used for supplying power to the inside, and the main purpose is to preferentially ensure that the cryogenic air separation unit 201 produces liquid oxygen and the molten iron bath pure oxygen gasification system produces synthesis gas and the like.
The inner power supply dispatching station 104 is connected with a cryogenic air separation unit 201, a material crushing unit 202, an electrothermal drying and baking furnace 203 and a pyrolysis furnace 204 respectively.
As shown in fig. 3 and 4, when there are sufficient wind and light resources, the cryogenic air separation unit 201, the material crusher set 202, the electric heating drying and baking furnace 203 and the pyrolysis furnace 204 are started as required by using the surplus power of the wind and light integrated power plant 101 to store energy; as shown in fig. 5 and 6, when there is no wind-light resource, the molten iron bath pure oxygen gasification system is started as required to produce synthesis gas by using the stored energy, and the synthesis gas is used for generating electricity.
The cryogenic air separation unit 201 is configured to prepare liquid oxygen by using surplus green electricity and store the liquid oxygen in the liquid oxygen storage tank 210 when there are sufficient wind and light resources, and gasify the liquid oxygen in the liquid oxygen storage tank 210 when there are no wind and light resources, and input the oxygen with pressure into the molten iron bath gasifier 301 to be used as a gasifying agent. The oxygen with pressure is heated before being input into the molten iron bath gasification furnace 301, and then is used for generating electricity through the first gas turbine generator set 216, and the electricity generated by the first gas turbine generator set 216 is input into the public power grid 105 through the external power supply dispatching station 103.
In this embodiment, a liquid oxygen valve 211 is connected to an outlet of the liquid oxygen storage tank 210, the opening and closing of the pipeline are controlled by the liquid oxygen valve 211, when the liquid oxygen needs to be gasified, the liquid oxygen valve 211 is opened, the liquid oxygen is pressurized by a liquid oxygen booster pump 212, the first air heat exchange vaporizer carries out gasification heat exchange, the first primary heater 214 is heated (the heat source is the medium-temperature waste heat 340 recovered by the gas power generation unit), the first secondary heater 215 is heated (the heat source is the high-temperature waste heat 345 recovered by the gas power generation unit), the enthalpy value is increased, then the first gas turbine generator set 216 generates electricity, the oxygen is temporarily stored by the high-pressure oxygen storage tank 302, and the oxygen can be immediately supplied to the molten iron bath gasifier 301 to be used as a gasifying agent when no wind light resource exists. Because the volume and the storage cost of the liquid oxygen are far lower than those of the oxygen, the cost can be obviously reduced by adopting the liquid oxygen storage in the early stage, a large amount of liquid oxygen can be stored, and the power generation is carried out when the oxygen needs to be used later, so that the power generation capacity and the energy utilization rate are improved.
The cryogenic air separation unit 201 is further connected with a liquid nitrogen storage tank 220, liquid nitrogen is prepared and stored in the liquid nitrogen storage tank 220 when sufficient wind and light resources exist, liquid nitrogen in the liquid nitrogen storage tank 220 is gasified, heated and warmed when wind and light resources do not exist, then power is generated through a second gas turbine generator set 217, and electricity generated by the second gas turbine generator set 217 is input to the public power grid 105 through an external power supply dispatching station 103.
The same principle as the liquid oxygen gasification is adopted, a liquid nitrogen valve 221 is connected to the outlet of the liquid nitrogen storage tank 220, the opening and closing of the pipeline are controlled through the liquid nitrogen valve 221, when the liquid nitrogen needs to be gasified, the liquid nitrogen is pressurized through a liquid nitrogen booster pump 222, gasified heat exchange is carried out through a second air heat exchange gasifier 223, the temperature of a second primary heater 224 (the heat source is intermediate-temperature waste heat 340 recovered by a gas power generation unit) and the temperature of a second secondary heater 225 (the heat source is high-temperature waste heat 345 recovered by the gas power generation unit) are increased through opening the liquid nitrogen valve 221, then the enthalpy value is increased, then the second gas turbine generator set 217 generates electricity, oxygen is temporarily stored through a high-pressure oxygen storage tank 302, and the oxygen can be immediately supplied to the molten iron bath gasification furnace 301 to be used as a gasification agent when no wind light resource exists. Because the air cryogenic separation can generate a part of liquid nitrogen while generating liquid oxygen, the storage of the liquid nitrogen can be increased, and then the power generation is carried out sequentially according to the needs, so that the power generation capacity and the energy utilization rate are improved.
Preferably, as shown in fig. 7, in order to further improve the energy utilization rate, the organic solid waste is subjected to a crushing treatment, and the system further comprises a cryogenic crushing system, wherein the cryogenic crushing system comprises a liquid nitrogen storage tank 220, a liquid nitrogen valve 221, a liquid nitrogen booster pump 222, a liquid nitrogen crusher 403, a cryogenic nitrogen crusher 401, a dust remover 402, a second air heat exchanger vaporizer 223, a second primary heater 224, a second secondary heater 225, a second gas turbine generator set 217 and a high-pressure nitrogen buffer tank 330 which are sequentially arranged, and the crushed material part of the cryogenic liquid nitrogen and the cryogenic nitrogen is used as a gasification raw material of the molten iron bath gasifier 301. If waste rubber and waste tires are sorted out from solid waste, the waste rubber and the waste tires sequentially pass through a low-temperature nitrogen pulverizer 401 and a liquid nitrogen pulverizer 403 to obtain rubber ultrafine powder for comprehensive utilization. The nitrogen and the materials are subjected to heat exchange and temperature rise to be gasified and enter a dust remover 402 for dust removal, then the medium-temperature waste heat 340 (the medium-temperature waste heat 340 recovered from the gas power generation unit) is used for primary temperature rise, the high-temperature waste heat 345 is used for secondary temperature rise from the high-temperature waste heat 345 recovered from the gas power generation unit, the enthalpy value is increased, and then the second gas turbine generator set 217 generates electricity.
The material crushing unit 202 is used for crushing the organic solid waste and storing the organic solid waste into the solid material storage tank 303 when sufficient wind and light resources exist, and basically, the organic solid waste is crushed to a certain size, such as a size of 10cm or smaller and a size of 3mm, so that the subsequent preparation of the synthesis gas by the molten iron bath pure oxygen gasification system is facilitated.
Wherein, the low-temperature nitrogen pulverizer 401 is connected with a rubber coarse particle bin 410 and a rubber micropowder discharging tank 411, and the liquid nitrogen pulverizer 403 is connected with a rubber micropowder feeding tank 412 and a rubber micropowder discharging tank 413.
The electric heating drying and baking furnace 203 is used for drying and baking the materials when sufficient wind and light resources exist and storing the materials in the solid material storage tank 303, for example, the materials crushed by the material crusher are dried and baked, the materials can be quickly dried by adopting a microwave method, the materials can be baked by adopting an electric heating method at a temperature of below 150 ℃, and the pretreated materials can be stored in the solid material storage tank 303 by adopting methods such as resistance heating, induction heating of a furnace wall, microwave irradiation and the like.
In this example, the chemical formula of the dry bake is:
Figure BDA0003726772730000101
wherein, interior power supply dispatch station 104 still is connected with pyrolysis oven 204, and this pyrolysis oven 204 is used for carrying out the pyrolysis to the material after electric heat drying roaster 203 handles to obtain pyrolysis oil and pyrolysis semicoke 209, this pyrolysis oil storage to pyrolysis oil tank 206, this pyrolysis semicoke 209 storage to solid material storage tank 303. And (3) performing electrically heated medium-low temperature pyrolysis on the dried and baked materials, wherein the pyrolysis temperature is 390-500 ℃, the obtained pyrolysis oil is stored in a pyrolysis oil tank 206, and materials such as pyrolysis semicoke 209 and the like are also stored in a solid material storage tank 303 so as to be used by a subsequent molten iron bath pure oxygen gasification system for producing synthesis gas.
In this example, the pyrolysis has the formula:
Figure BDA0003726772730000102
the material in the solid material storage tank 303 and the oxygen with pressure after the liquid oxygen gasification are used for gasifying the molten iron bath pure oxygen gasification system to prepare synthetic fuel gas in the absence of wind and light resources, and the fuel gas power generation is carried out through the fuel gas power generation unit, and the electricity generated by the molten iron bath pure oxygen gasification system is input to the public power grid 105.
In this embodiment, the molten iron bath pure oxygen gasification system includes a molten iron bath gasification furnace 301 for gasifying the material and the pyrolysis semicoke 209 and the pyrolysis oil to generate the synthesis gas, an oxygen lance 306 for charging oxygen into the molten iron bath gasification furnace 301, and a material lance 307 for inputting the material into the molten iron bath gasification furnace 301. The synthesis gas is produced by cracking and gasifying organic solid wastes and other materials in the current mature molten iron bath, so that the synthesis gas can be used for subsequent gas power generation units to perform gas power generation, the heat energy recovered in the synthesis gas treatment process can be recycled, and the energy utilization rate is effectively improved.
Specifically, the material lance 307 is driven to ascend and descend by the material lance elevating mechanism 305, and the oxygen lance 306 is driven to ascend and descend by the oxygen lance elevating mechanism 304, which are the prior art of my prior application.
When wind and solar resources are insufficient, carbon dioxide in the carbon dioxide storage tank 315 serves as carrier gas, organic materials pretreated in the solid material storage tank 303 are sprayed into the molten iron bath gasification furnace 301 through the material spray gun 307, gasified high-pressure oxygen (temporarily stored in the high-pressure oxygen storage tank 302) is sprayed into the molten iron bath gasification furnace 301 through the oxygen lance 306, cracking-gasification is carried out in molten iron liquid in this way, high-temperature synthetic gas is obtained, the high-temperature synthetic gas enters the first waste heat boiler 312 of the gas power generation unit to be cooled and dedusted, the low-temperature clean synthetic gas is obtained, and subsequent gas power generation and carbon capture operations are carried out.
Preferably, the molten iron bath pure oxygen gasification system further comprises a pyrolysis oil heat exchanger 332 for exchanging heat with pyrolysis oil, and a pyrolysis oil booster pump 331 for boosting the pyrolysis oil in the pyrolysis oil tank 206 and inputting the boosted pyrolysis oil to the pyrolysis oil heat exchanger 332 for exchanging heat, wherein the pyrolysis oil is added to the molten iron bath gasifier 301 through a pyrolysis oil injection pipe 333 for pyrolysis gasification after heat recovery after heat exchange by the pyrolysis oil heat exchanger 332. The pyrolysis oil can be effectively utilized, substances generated by all parts are fully utilized, the energy utilization rate is obviously improved, and the environment is protected.
Wherein the gas power generation unit comprises a first waste heat boiler 312 connected with a synthesis gas outlet of the molten iron bath gasification furnace 301, a first steam turbine power generation unit 320 for recovering heat of the first waste heat boiler 312 to generate power, a gas turbine power generation unit 321 and an internal combustion power generation unit 324 for generating power through synthesis gas, a steam conversion unit for performing steam conversion reaction on the synthesis gas to generate hydrogen and carbon dioxide, a carbon dioxide removal unit 314 for absorbing carbon dioxide to obtain hydrogen, a hydrogen purification unit 317 for purifying hydrogen, a proton membrane hydrogen fuel cell stack 318 and a high temperature fuel cell stack 316 for generating power through hydrogen, a second waste heat boiler 322 for recovering the gas turbine power generation unit 321, and a second steam turbine power generation unit 323 connected with the second waste heat boiler 322, the first steam turbine power generation unit 320, the second steam turbine power generation unit 323, The electricity generated by the gas turbine generator set 321, the internal combustion generator set 324, the proton membrane hydrogen fuel cell stack 318 and the high temperature fuel cell stack 316 is input to the public power grid 105 through the external power supply dispatching station 103. The heat energy is continuously recovered in the process of processing the synthesis gas, the hydrogen and the carbon dioxide are separated, the carbon dioxide is recovered, the hydrogen is utilized to generate electricity, and the negative carbon emission of the electricity generation can be realized.
Preferably, the internal combustion engine generator set 324 is connected with an internal combustion engine waste heat recovery device 325 for recovering waste heat and providing the waste heat to the heat source for supplementing heat to the gasified high-pressure oxygen and high-pressure nitrogen so as to improve the energy conversion efficiency of the air turbine power generation.
Specifically, the power generation mode of the synthetic gas comprises the power generation of an internal combustion engine directly burning the synthetic gas, the power generation of a gas turbine of the high-pressure synthetic gas, the power generation of a high-temperature fuel cell stack 316 of crude hydrogen after hydrogen production and decarbonization through steam conversion to generate direct current, and the power generation of a proton membrane fuel cell stack after purification of the crude hydrogen. The gas power generation is carried out in various modes, so that the energy utilization rate is effectively improved, and the stable power supply of the wind power and photovoltaic integrated power station 101 is ensured.
In this embodiment, the first exhaust-heat boiler 312 is cooled and dedusted, a part of the synthesis gas which is changed into low-temperature clean synthesis gas is divided to generate electricity through a gas turbine generator set 321(IGCC), or the internal combustion generator set 324 generates electricity, the other part of the synthesis gas enters a steam conversion unit 313 to perform a steam conversion link, a steam conversion reaction is performed to generate hydrogen and carbon dioxide gas, the carbon dioxide gas is absorbed by a carbon dioxide removal unit 314 to obtain crude hydrogen, the crude hydrogen can be generated in two modes, the crude hydrogen enters a high-temperature fuel cell stack 316(MCFC) to generate electricity, the rest of the crude hydrogen is further purified by a hydrogen purification unit 317 and enters a proton membrane hydrogen fuel cell stack 318(PEMFC) to generate electricity, and the generated electricity is supplied to the public power grid 105 through an external power supply dispatching station 103 after passing through a direct current inverter 319. The starting and stopping time of the gas power generation can be finished within 5-7 minutes, and flexible response and matching of fluctuation of wind power photovoltaics are facilitated.
During the gasification of the synthesis gas, the first waste heat boiler 312 collects high-temperature waste heat 345, and the steam conversion unit 313, the internal combustion engine waste heat recovery device 325 and the high-temperature fuel cell stack 316 respectively recover medium and low-temperature waste heat. The waste heat is supplied to the first primary heater 214 and the first secondary heater 215, the second primary heater 224 and the second secondary heater 225, and the enthalpy of oxygen and nitrogen is increased for the first gas turbine generator set 216 and the second gas turbine generator set 217 to generate electricity.
The external power generation power state and the energy storage level of the technology in the wind and light power generation (table 1) and the gas-making-gas power generation (table 2) by the molten iron bath are further quantitatively and clearly shown as follows. Table 1 also shows that conventional photovoltaic wind power cannot store sufficient energy to cover the power demand when the resources are in short supply due to limited resource duration.
Figure BDA0003726772730000131
TABLE 1
Figure BDA0003726772730000132
TABLE 2
Therefore, by adopting the scheme of the invention, the generating capacity and the power supply time can be obviously improved.
The present invention is not described in detail in the prior art, and therefore, the present invention is not described in detail.
It is understood that the terms "a" and "an" should be interpreted as meaning "at least one" or "one or more," i.e., that a quantity of one element may be one in one embodiment, while a quantity of another element may be plural in other embodiments, and the terms "a" and "an" should not be interpreted as limiting the quantity.
Although the wind power photovoltaic integrated power plant 101, the distribution station 102, the external power supply dispatching station 103, the internal power supply dispatching station 104, the public power grid 105, the cryogenic air separation unit 201, the material crusher set 202, the electric heat drying and baking furnace 203, the pyrolysis furnace 204, the pyrolysis gas phase condenser 205, the pyrolysis oil tank 206, the condensed sewage tank 207, the pyrolysis gas storage tank 208, the pyrolysis semicoke 209, the liquid oxygen storage tank 210, the liquid oxygen valve 211, the liquid oxygen booster pump 212, the first air heat exchange gasifier 213, the first primary heater 214, the first secondary heater 215, the first gas turbine generator set 216, the second gas turbine generator set 217, the liquid nitrogen storage tank 220, the liquid nitrogen valve 221, the liquid nitrogen booster pump 222, the second air heat exchange gasifier 223, the second primary heater 224, the second secondary heater 225, the molten iron bath gasifier 301, the high pressure oxygen storage tank 302, the solid material storage tank 303, the oxygen lance lifting mechanism 304, A material gun lifting mechanism 305, an oxygen lance 306, a material spray gun 307, a first waste heat boiler 312, a water vapor conversion unit 313, a carbon dioxide removing unit 314, a carbon dioxide storage tank 315, a high-temperature fuel cell stack 316, a hydrogen purifying unit 317, a proton membrane hydrogen fuel cell stack 318, a direct current inverter 319, a first steam turbine generator set 320, a gas turbine generator set 321, a second waste heat boiler 322 and a second steam turbine generator set 323, the method comprises the following steps of using terms of an internal combustion generator set 324, an internal combustion engine waste heat recovery device 325, a high-pressure nitrogen buffer tank 330, a pyrolysis oil booster pump 331, a pyrolysis oil heat exchanger 332, a pyrolysis oil injection pipe 333, medium-temperature waste heat 340, high-temperature waste heat 345, a low-temperature nitrogen pulverizer 401, a dust remover 402, a liquid nitrogen pulverizer 403, a rubber coarse particle bin 410, a rubber micropowder blanking tank 411, a rubber micropowder feeding tank 412, a rubber micropowder tank 413 and the like, but does not exclude the possibility of using other terms. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed as being without limitation to any additional limitations that may be imposed by the spirit of the present invention.
The present invention is not limited to the above-mentioned preferred embodiments, and any other products in various forms can be obtained by anyone in the light of the present invention, but any changes in the shape or structure thereof, which have the same or similar technical solutions as the present application, fall within the protection scope of the present invention.

Claims (10)

1. A wind power photovoltaic coupling liquid oxygen molten iron bath gasification gas energy storage power generation system is applied to an energy storage type comprehensive power generation system with peak clipping and valley filling and is characterized by comprising a wind power photovoltaic comprehensive power station, a molten iron bath pure oxygen gasification system and a gas power generation unit;
the wind power and photovoltaic integrated power station is connected to a public power grid to supply power externally, and internal power supply is carried out through an internal power supply dispatching station;
the inner power supply dispatching station is respectively connected with a deep cooling air separation unit, a material crushing unit and an electric heating drying baking furnace;
when sufficient wind and light resources exist, a deep cooling air separation unit, a material crushing unit and an electrothermal drying baking furnace are started to store energy according to the needs by utilizing the redundant electric power of the wind power and photovoltaic integrated power station; when no wind and light resources exist, starting a molten iron bath pure oxygen gasification system as required to generate synthesis gas, and generating power by using the synthesis gas;
the cryogenic air separation plant is used for preparing liquid oxygen by utilizing surplus green electricity and storing the liquid oxygen into a liquid oxygen storage tank when sufficient wind and light resources exist, gasifying the liquid oxygen in the liquid oxygen storage tank when no wind and light resources exist, and inputting oxygen with pressure into a molten iron bath gasification furnace to be used as a gasifying agent; the method comprises the following steps that oxygen with pressure is heated and heated before being input into a molten iron bath gasification furnace, then electricity is generated through an air turbine generator set, and electricity generated by the air turbine generator set is input into a public power grid through an external power supply dispatching station;
the material crusher set is used for crushing organic solid wastes and storing the organic solid wastes into a solid material storage tank when sufficient wind and light resources exist;
the electric heating drying and baking furnace is used for drying and baking materials when sufficient wind and light resources exist and storing the materials into the solid material storage tank;
the material in the solid material storage tank and the oxygen with pressure after liquid oxygen gasification are used for gasifying the molten iron bath pure oxygen gasification system to prepare synthetic fuel gas in the absence of wind and light resources, and fuel gas power generation is carried out through the fuel gas power generation unit, and the electricity generated by the molten iron bath pure oxygen gasification system is input to the public power grid.
2. The wind power and photovoltaic coupling liquid-oxygen molten iron bath gasification gas energy storage and power generation system as claimed in claim 1, wherein the internal power supply dispatching station is further connected with a pyrolysis furnace, the pyrolysis furnace is used for pyrolyzing the materials treated by the electric heating drying and baking furnace to obtain pyrolysis oil and pyrolysis semicoke, the pyrolysis oil is stored in a pyrolysis oil tank, and the pyrolysis semicoke is stored in the solid material storage tank.
3. The wind power photovoltaic coupling liquid oxygen molten iron bath gasification gas energy storage power generation system according to claim 2, wherein the molten iron bath pure oxygen gasification system comprises a molten iron bath gasification furnace for gasifying materials, pyrolysis semicoke and pyrolysis oil to generate synthesis gas, an oxygen lance for charging the molten iron bath gasification furnace with oxygen, and a material spray gun for inputting materials into the molten iron bath gasification furnace.
4. The wind power photovoltaic coupling liquid oxygen molten iron bath gasification gas energy storage power generation system according to claim 3, wherein the gas power generation unit comprises a first waste heat boiler connected with a synthesis gas outlet of the molten iron bath gasification furnace, a first steam turbine power generation unit for recovering heat of the first waste heat boiler to generate power, a gas turbine power generation unit and an internal combustion power generation unit for generating power through synthesis gas, a steam conversion unit for performing steam conversion reaction on the synthesis gas to generate hydrogen and carbon dioxide, a carbon dioxide removal unit for absorbing the carbon dioxide to prepare hydrogen, a hydrogen purification unit for purifying the hydrogen, a proton membrane hydrogen fuel cell stack and a high temperature fuel cell stack for generating power through the hydrogen, the first steam turbine power generation unit, the gas turbine power generation unit, the internal combustion power generation unit, a fuel cell stack, a fuel cell stack, a fuel cell stack, a fuel, And the electricity generated by the proton membrane hydrogen fuel cell stack and the high-temperature fuel cell stack is input to the public power grid through the external power supply dispatching station.
5. The wind power photovoltaic coupling liquid oxygen molten iron bath gasification gas energy storage power generation system according to claim 3, characterized in that the molten iron bath pure oxygen gasification system further comprises a pyrolysis oil heat exchanger for exchanging heat for pyrolysis oil and a pyrolysis oil booster pump for boosting the pyrolysis oil in the pyrolysis oil tank and inputting the boosted pyrolysis oil to the pyrolysis oil heat exchanger for heat exchange, and the pyrolysis oil is added to the molten iron bath gasification furnace for pyrolysis gasification after heat is recovered after heat exchange by the pyrolysis oil heat exchanger.
6. The wind power photovoltaic coupling liquid oxygen molten iron bath gasification gas energy storage power generation system according to claim 4, wherein the gas power generation unit further comprises a second waste heat boiler for recovering the gas turbine power generation unit and a second steam turbine power generation unit connected with the second waste heat boiler, and electricity of the second steam turbine power generation unit is also input to the public power grid through the external power supply dispatching station.
7. The wind power photovoltaic coupling liquid oxygen molten iron bath gasification gas energy storage power generation system according to claim 3, wherein the power generation mode of the synthetic gas comprises power generation of a synthesis gas direct-fired internal combustion engine, power generation of a high-pressure synthesis gas turbine, power generation of a crude hydrogen high-temperature fuel cell stack after hydrogen production and decarburization through steam conversion, and power generation of a proton membrane fuel cell stack after crude hydrogen purification.
8. The wind power and photovoltaic coupling liquid oxygen molten iron bath gasification gas energy storage power generation system according to claim 4, characterized in that the internal combustion generator set is connected with an internal combustion engine waste heat recovery device, and the recovered waste heat is used as a heat source to provide the gasified high-pressure oxygen and high-pressure nitrogen for heat supplementation so as to improve the energy conversion efficiency of air turbine power generation.
9. The wind power photovoltaic coupling liquid oxygen molten iron bath gasification gas energy storage power generation system according to any one of claims 1 to 8, further comprising a liquid nitrogen storage tank connected with the cryogenic air separation unit, wherein liquid nitrogen is prepared and stored in the liquid nitrogen storage tank when sufficient wind and light resources exist, liquid nitrogen in the liquid nitrogen storage tank is gasified, heated and warmed when no wind and light resources exist, and then power is generated by a second gas turbine generator set, and electricity generated by the second gas turbine generator set is input to the public power grid through the external power supply dispatching station.
10. The wind power photovoltaic coupling liquid oxygen molten iron bath gasification gas energy storage power generation system according to claim 9, further comprising a low temperature crushing system, wherein the low temperature crushing system comprises a liquid nitrogen storage tank, a liquid nitrogen valve, a liquid nitrogen booster pump, a liquid nitrogen crusher, a low temperature nitrogen crusher, a dust remover, an air heat exchanger vaporizer, a primary heater, a secondary heater, a nitrogen turbine generator set and a high pressure nitrogen buffer tank which are arranged in sequence, and the crushed material part of the low temperature liquid nitrogen and the low temperature nitrogen is used as a gasification raw material of the molten iron bath gasification furnace.
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