CN113217134B - Combined cooling, heating and power system with compressed air energy storage function and for recovering waste heat of molten magnesium lead - Google Patents
Combined cooling, heating and power system with compressed air energy storage function and for recovering waste heat of molten magnesium lead Download PDFInfo
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- CN113217134B CN113217134B CN202110428725.0A CN202110428725A CN113217134B CN 113217134 B CN113217134 B CN 113217134B CN 202110428725 A CN202110428725 A CN 202110428725A CN 113217134 B CN113217134 B CN 113217134B
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- 239000002918 waste heat Substances 0.000 title claims abstract description 85
- 238000004146 energy storage Methods 0.000 title claims abstract description 49
- 238000010438 heat treatment Methods 0.000 title claims abstract description 31
- FKSZLDCMQZJMFN-UHFFFAOYSA-N [Mg].[Pb] Chemical compound [Mg].[Pb] FKSZLDCMQZJMFN-UHFFFAOYSA-N 0.000 title claims abstract description 29
- 238000001816 cooling Methods 0.000 title claims abstract description 24
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims abstract description 45
- 229910052749 magnesium Inorganic materials 0.000 claims abstract description 45
- 239000011777 magnesium Substances 0.000 claims abstract description 45
- 238000010248 power generation Methods 0.000 claims abstract description 35
- 238000011084 recovery Methods 0.000 claims abstract description 24
- 238000002844 melting Methods 0.000 claims abstract description 9
- 230000008018 melting Effects 0.000 claims abstract description 9
- 239000000463 material Substances 0.000 claims description 30
- 239000000498 cooling water Substances 0.000 claims description 11
- 238000004064 recycling Methods 0.000 claims description 10
- 238000010521 absorption reaction Methods 0.000 claims description 3
- 239000011796 hollow space material Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 14
- 238000005057 refrigeration Methods 0.000 abstract description 3
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 10
- 238000004519 manufacturing process Methods 0.000 description 6
- 239000000395 magnesium oxide Substances 0.000 description 5
- 230000005611 electricity Effects 0.000 description 3
- 239000001095 magnesium carbonate Substances 0.000 description 3
- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 3
- 229910000021 magnesium carbonate Inorganic materials 0.000 description 3
- 235000014380 magnesium carbonate Nutrition 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K27/00—Plants for converting heat or fluid energy into mechanical energy, not otherwise provided for
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K11/00—Plants characterised by the engines being structurally combined with boilers or condensers
- F01K11/02—Plants characterised by the engines being structurally combined with boilers or condensers the engines being turbines
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- 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
-
- 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
- F04B41/00—Pumping installations or systems specially adapted for elastic fluids
- F04B41/02—Pumping installations or systems specially adapted for elastic fluids having reservoirs
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B29/00—Combined heating and refrigeration systems, e.g. operating alternately or simultaneously
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
- F27D2017/006—Systems for reclaiming waste heat using a boiler
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/16—Mechanical energy storage, e.g. flywheels or pressurised fluids
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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
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Abstract
The invention discloses a combined cooling heating and power system with compressed air energy storage for recovering waste heat of a molten magnesium lead. The system comprises a molten magnesium lead waste heat recovery subsystem, a power generation subsystem, a heat collection subsystem and a compressed air energy storage subsystem. In the magnesium melting lump waste heat recovery subsystem, circulating air absorbs the magnesium melting lump waste heat and is sent into a waste heat boiler to generate steam, and the steam generated by the waste heat boiler in the power generation subsystem drives a steam turbine to generate power. The compressed air energy storage subsystem is used for relieving the problem that the residual heat generating capacity of the molten magnesium lead is not matched with the electric load. Meanwhile, when the heat supply is insufficient, the compressed air energy storage system is started, and heat is obtained from the energy storage process. The high-temperature air flowing out of the waste heat boiler and the condenser of the power generation system still have waste heat, and the waste heat is collected by the heat collection subsystem and used for the energy release process of the heat supply, refrigeration and compressed air energy storage system.
Description
Technical Field
The invention belongs to the technical field of combined cooling heating and power and recycling of waste heat of a molten magnesium lead, and relates to a combined cooling heating and power system with a compressed air energy storage function for recycling the waste heat of the molten magnesium lead.
Background
In the fused magnesite industry in China, electric arc furnaces are mostly adopted to melt natural magnesite to prepare the fused magnesite, the production process and technical equipment are backward, huge waste heat resources contained in high-temperature magnesium melting rollers cannot be recycled, and a large amount of heat energy is lost. The central temperature of the discharging of the fused magnesia lump is more than 2800 ℃, the average temperature of the wall surface is more than 600 ℃, the fused magnesia effectively absorbs heat and is converted into the fused magnesia after the production is finished, the fused magnesia contains energy of more than 4 multiplied by 106KJ/t, and the total energy accounts for about 30 percent of the total energy consumption of the fused magnesia production. The waste heat recovery of the effective heat contained in the fused magnesium mound is a breaking point of the fused magnesium system for saving energy. The method is important for energy-saving modification of high-temperature crushing and high-temperature waste heat recovery of the fused magnesium mounds.
In order to recycle the waste heat resource of the magnesium fused weight, the name of the method is a fused magnesium low-temperature waste heat power generation method, and a patent with the application number of CN201010607845.9 proposes power generation by using the waste heat of the fused weight. The patent does not specifically describe how to recover the residual heat of the molten magnesium lump, and only uses simple gas to absorb the residual heat of the molten lump. The gas with the waste heat of the molten steel is recycled, the heat is transferred to the power generation working medium and then directly discharged into the atmosphere through the induced draft fan, so that the waste of heat energy is caused, and air pollution is possibly caused. The patent with the application number of CN201811469239.8 proposes a more detailed waste heat recovery method, and the method comprises the steps of sequentially feeding the fused weight into a magnesium fused weight waste heat recovery chamber, a shell-breaking magnesium fused weight waste heat recovery chamber and a self-deoxidizing magnesium fused weight waste heat recovery chamber to recover waste heat. However, this method requires multiple transportation of the molten mound, during which the heat loss is severe. In addition, because the volume of the molten weight is large, the heat exchange is only carried out by the radiation of the surface of the molten weight and a water-cooled wall, the heat exchange time is long, and the utilization rate of internal heat is not high.
Disclosure of Invention
The invention aims to provide a combined cooling, heating and power system with compressed air energy storage and for recovering waste heat of a molten magnesium lead, which solves the problems of serious heat loss, long heat exchange time and low internal heat utilization rate of the conventional system, and can store redundant electric quantity during high generating capacity and release the electric quantity for supplement when the generating capacity is insufficient so as to balance supply and demand.
The invention provides a combined cooling heating and power system with a compressed air energy storage system for recovering waste heat of a molten magnesium lead, which comprises a molten magnesium lead waste heat recovery subsystem, a power generation subsystem, a heat collection subsystem and a compressed air energy storage subsystem; the molten magnesium lead waste heat recovery subsystem is connected with the power generation subsystem through a waste heat boiler; the power generation subsystem and the compressed air energy storage subsystem are connected with a circuit through a first generator; the heat collection subsystem is connected with the power generation subsystem, the molten magnesium lead waste heat recovery subsystem and the compressed air energy storage subsystem respectively through a condenser, a circulating hot air-heat collection working medium heat exchanger and a heat collection working medium-compressed air heat exchanger;
the molten magnesium lump waste heat recovery subsystem is formed into a loop by connecting a high-temperature heat exchange tower, a hot air side of a waste heat boiler, a hot air side of a circulating hot air-heat collection working medium heat exchanger and a circulating fan end to end through a circulating hot air pipeline; the power generation subsystem is formed by connecting a power generation working medium side of the waste heat boiler, a steam turbine, a steam side of the condenser and a circulating pump end to end through a pipeline to form a loop, and the steam turbine is coaxially connected with the first generator; the compressed air energy storage subsystem comprises an air compressor, a compressed air-cooling water heat exchanger, an air storage tank, a heat collection working medium-compressed air heat exchanger and an air turbine which are sequentially connected, wherein an outlet of the air storage tank is connected with an air side of the heat collection working medium-compressed air heat exchanger, the air compressor is coaxially connected with the motor, the motor is connected with a first generator through a circuit, and the air turbine is coaxially connected with a second generator;
in the heat collection subsystem, an outlet of a heat collection working medium circulating pump, a heat collection working medium side of a condenser, a heat collection working medium side of a circulating hot air-heat collection working medium heat exchanger and a first three-way valve are sequentially connected through a pipeline; the first three-way valve is divided into two paths, the two paths are respectively connected with the heating and absorption refrigerator and then collected at the inlet of the second three-way valve, the pipeline is divided into two paths through the second three-way valve, one path passes through the heat collection working medium side of the heat collection working medium-compressed air heat exchanger and then is collected with the other path of pipeline and then is connected to the inlet of the heat collection working medium circulating pump, and the other path of pipeline is connected with the heat collection working medium circulating pump to form a loop.
In the combined cooling heating and power system with the compressed air energy storage function and the function of recycling the waste heat of the molten magnesium lump, the high-temperature material block of the molten magnesium lump produced after being peeled and crushed is placed in the high-temperature heat exchange tower.
In the combined cooling heating and power system with compressed air energy storage for recovering the waste heat of the molten magnesium lead, a multilayer hollow material block slideway is arranged in the high-temperature heat exchange tower, and air passes through the material block slideway from bottom to top; when a new magnesium fused weight high-temperature material block is generated, the original high-temperature material block on each material block slideway is pushed into the next slideway by a mechanical device, and the new magnesium fused weight high-temperature material block is laid on the slideway on the uppermost layer.
In the combined cooling heating and power system with the compressed air energy storage function for recovering the waste heat of the molten magnesium lump, the molten magnesium lump waste heat recovery subsystem absorbs the waste heat of the high-temperature lump material of the molten magnesium lump by using circulating hot air, and then the waste heat is sent to the hot air side of the waste heat boiler to exchange heat with a power generation working medium, so that steam is generated for power generation.
In the combined cooling heating and power system with the compressed air energy storage function and the magnesium melting lump waste heat recovery function, in the heat collection system, a heat collection working medium exchanges heat with the exhaust steam with lower temperature after the steam turbine applies work in the condenser, and then enters the circulating hot air-heat collection working medium to exchange heat with the circulating hot air with higher temperature.
In the combined cooling heating and power system with the compressed air energy storage function for recovering the waste heat of the molten magnesium lead, in the compressed air energy storage subsystem, a first generator is connected with a motor through a circuit, the motor drives an air compressor to compress air, the temperature of the compressed air is increased and the compressed air and cooling water exchange heat through a compressed air-cooling water heat exchanger to realize heating, and the cooled compressed air is stored in an air storage tank.
The combined cooling heating and power system with the compressed air energy storage function for recovering the waste heat of the molten magnesium lead has at least the following beneficial effects:
1. the combined cooling heating and power system with the compressed air energy storage function and the function of recycling the waste heat of the molten magnesium lead can effectively recycle a large amount of waste heat resources of the molten magnesium lead and is used for meeting the energy utilization requirements of multiple strands of cooling, heating and power.
2. The magnesium melting lump waste heat recovery subsystem uses cheap and easily available air as a heat transfer working medium, uses circulating hot air to absorb the waste heat of the high-temperature lump material of the magnesium melting lump, and then sends the waste heat to the hot air side of the waste heat boiler to exchange heat with a power generation working medium, so that steam is generated for power generation.
3. Due to the characteristics of the production of the fused magnesium, the problem that the generated energy is not matched with the electric load exists. The compressed air energy storage subsystem can store redundant electric quantity when the generated energy is high, and release the electric quantity to supplement when the generated energy is insufficient, so that supply and demand are balanced.
4. The combined cooling heating and power system with the compressed air energy storage system for recovering the waste heat of the molten magnesium lead preferentially meets the requirement of power production, and the recovered waste energy is used for refrigeration and heat supply in the power production process.
Drawings
Fig. 1 is a schematic diagram of a combined cooling, heating and power system with compressed air energy storage for recovering waste heat of a molten magnesium lead.
Detailed Description
As shown in fig. 1, the combined cooling heating and power system with a compressed air energy storage system for recovering the waste heat of the molten magnesium lead comprises a molten magnesium lead waste heat recovery subsystem, a power generation subsystem, a heat collection subsystem and a compressed air energy storage subsystem. The magnesium melting lead waste heat recovery subsystem is connected with the power generation system through a waste heat boiler 2; the power generation subsystem and the compressed air energy storage subsystem are connected with a circuit through the first power generator 6; the heat collection subsystem is connected with the power generation subsystem, the molten magnesium lump waste heat recovery subsystem and the compressed air energy storage subsystem respectively through a condenser 7, a circulating hot air-heat collection working medium heat exchanger 3 and a heat collection working medium-compressed air heat exchanger 13.
The molten magnesium lump waste heat recovery subsystem is formed by connecting a high-temperature heat exchange tower 1, a hot air side of a waste heat boiler 2, a hot air side of a circulating hot air-heat collection working medium heat exchanger 3 and a circulating fan 4 end to end through a circulating hot air pipeline to form a loop. The power generation subsystem is formed by connecting the power generation working medium side of the waste heat boiler 3, the steam turbine 5, the steam side of the condenser 7 and the circulating pump 8 end to end through pipelines to form a loop, and the steam turbine 5 is coaxially connected with the first power generator 6. The compressed air energy storage subsystem comprises an air compressor 15, a compressed air-cooling water heat exchanger 16, an air storage tank 17, a heat collection working medium-compressed air heat exchanger 13 and an air turbine 18 which are sequentially connected, an outlet of the air storage tank 17 is connected with an air side of the heat collection working medium-compressed air heat exchanger 13, the air compressor 15 is coaxially connected with an electric motor 14, the electric motor 14 is connected with the first generator 6 through a circuit, and the air turbine 18 is coaxially connected with the second generator 19.
In the heat collection subsystem, an outlet of the heat collection working medium circulating pump 9, a heat collection working medium side of the condenser 7, a heat collection working medium side of the circulating hot air-heat collection working medium heat exchanger 3 and the first three-way valve 10 are sequentially connected through pipelines. The first three-way valve 10 is divided into two paths which are respectively connected with the heating and absorption refrigerator 11 and then converged at the inlet of the second three-way valve 12, the pipeline is divided into two paths through the second three-way valve 12, one path passes through the heat collection working medium side of the heat collection working medium-compressed air heat exchanger 13 and then converged with the other path of pipeline to be connected to the inlet of the heat collection working medium circulating pump 9 and then is connected with the heat collection working medium circulating pump to form a loop.
In specific implementation, the high-temperature heat exchange tower 1 is filled with a high-temperature material block of molten magnesium mound produced after being peeled and crushed. A plurality of layers of hollow material block slideways are arranged in the high-temperature heat exchange tower 1, and air passes through the material block slideways from bottom to top; when a new magnesium fused weight high-temperature material block is generated, the original high-temperature material block on each material block slideway is pushed into the next slideway by a mechanical device, and the new magnesium fused weight high-temperature material block is laid on the slideway on the uppermost layer.
When the system is implemented specifically, the molten magnesium lump waste heat recovery subsystem absorbs the waste heat of the high-temperature lump material of the molten magnesium lump by using circulating hot air, and then the waste heat is sent to the hot air side of the waste heat boiler to exchange heat with a power generation working medium, so that steam is generated for power generation. In the heat collection system, a heat collection working medium exchanges heat with the exhaust steam with lower temperature after the steam turbine does work in the condenser, and then enters the circulating hot air-heat collection working medium to exchange heat with the circulating hot air with higher temperature. In the compressed air energy storage subsystem, a first generator is connected with a motor through a circuit, the motor drives an air compressor to compress air, the temperature of the compressed air is increased and the compressed air and cooling water exchange heat through a compressed air-cooling water heat exchanger to realize heating, and the cooled compressed air is stored in an air storage tank.
The working process and principle of the invention are as follows:
the solidified magnesium melt mound is peeled and crushed at a high temperature to generate a high-temperature lump material, and the high-temperature lump material is sent into a high-temperature heat exchange tower 1. Hot air is driven by a circulating fan 4 to enter the high-temperature heat exchange tower 1 to exchange heat with the molten magnesium lump high-temperature lump material to generate high-temperature hot air with the temperature of over 1000 ℃, a multilayer hollow lump material slideway is arranged in the high-temperature heat exchange tower 1, and air passes through the high-temperature heat exchange tower from bottom to top; when a new magnesium fused weight high-temperature material block is generated, the original high-temperature material block on each material block slideway is pushed into the next slideway by a mechanical device, and the new magnesium fused weight high-temperature material block is laid on the slideway on the uppermost layer. The high-temperature hot air enters the waste heat boiler 2 to exchange heat with the power generation working medium in the power generation subsystem to generate steam. The hot air after heat exchange in the waste heat boiler 2 enters the circulating hot air-heat collection working medium heat exchanger 3 to exchange heat with the heat collection working medium, so as to become low-temperature hot air. The low-temperature hot air is pushed by the circulating fan 4 to enter the high-temperature heat exchange tower 1 for the next circulation.
Steam generated in the waste heat boiler 2 enters a steam turbine 5 to push the steam turbine to do work, and the steam turbine 5 drives a first generator 6 to generate electricity to supply power to users. The exhaust steam after the work of the steam turbine 5 enters a condenser 7 to exchange heat with a heat collection working medium, and then is pressurized by a circulating pump 8 to enter the waste heat boiler 2 for the next circulation.
The yield of the molten magnesium mound has instability, and the power generation amount is determined by the yield of the molten magnesium mound and also has instability. When the generated energy cannot meet the electric load of the user, the insufficient part is supplemented by the power grid. When the generated energy exceeds the electric load of a user, the redundant generated energy passes through the compressed air energy storage subsystem, and the energy is stored in the compressed air.
The air compression energy storage subsystem can realize two processes of energy storage and energy release. Energy storage process: the residual electricity is transmitted to the motor 14 through a circuit by the first generator 6, and the motor 14 drives the air compressor 15 to compress air to a certain pressure and then store the air in the air storage tank 17. The air is compressed and then increased in temperature, and is cooled by cooling water while passing through the compressed air-cooling water heat exchanger 16, and the water absorbing the heat of compression is used for heating. Meanwhile, the air compressor 15 can be started to compress air to obtain heat when the heat supply is insufficient. The energy release process is as follows: the high-pressure air is discharged from the air storage tank 17, is heated by the heat collection working medium through the heat collection working medium-compressed air heat exchanger 13, and then is sent to the air turbine 18 to expand and do work, and the air turbine 18 further drives the second generator 19 to generate electricity to supply power to users. The air temperature after expansion work is lower, and the air can be used for refrigeration.
The heat collection working medium passes through the heat collection working medium side of the condenser under the driving of the circulating pump 9 to exchange heat with the exhaust steam, and then enters the circulating hot air-heat collection working medium heat exchanger 3 to exchange heat with circulating hot air with higher temperature, so that the temperature is further increased. The heat collecting working medium absorbing heat supplies heat and refrigerates through the adjustment of the first three-way valve 10. When the compressed air energy storage subsystem does not carry out the energy release process, the heat collection working medium completely bypasses the heat collection working medium-compressed air heat exchanger 13 to reach the circulating pump 9 through a bypass by adjusting the second three-way valve 12. When the compressed air energy storage subsystem carries out the energy release process, the heat collecting working medium is partially collected through the shunt part of the second three-way valve 12, and the compressed air is heated through the heat collecting working medium side of the heat collecting working medium-compressed air heat exchanger 13.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the present invention, which is defined by the appended claims.
Claims (6)
1. A combined cooling heating and power system with a compressed air energy storage system for recovering waste heat of a molten magnesium lead is characterized by comprising a molten magnesium lead waste heat recovery subsystem, a power generation subsystem, a heat collection subsystem and a compressed air energy storage subsystem; the molten magnesium lead waste heat recovery subsystem is connected with the power generation subsystem through a waste heat boiler; the power generation subsystem and the compressed air energy storage subsystem are connected with a circuit through a first generator; the heat collection subsystem is connected with the power generation subsystem through a condenser; the heat collection subsystem is connected with the magnesium melting lump waste heat recovery subsystem through a circulating hot air-heat collection working medium heat exchanger; the heat collection subsystem is connected with the compressed air energy storage subsystem through a heat collection working medium-compressed air heat exchanger;
the magnesium melting lump waste heat recovery subsystem is formed into a loop by connecting a high-temperature heat exchange tower, a hot air side of a waste heat boiler, a hot air side of a circulating hot air-heat collection working medium heat exchanger and a circulating fan end to end through a circulating hot air pipeline; the power generation subsystem is characterized in that a power generation working medium side of the waste heat boiler, a steam turbine, a steam side of a condenser and a circulating pump are connected end to end through pipelines to form a loop, and the steam turbine is coaxially connected with the first generator; the compressed air energy storage subsystem comprises an air compressor, a compressed air-cooling water heat exchanger, an air storage tank, a heat collection working medium-compressed air heat exchanger and an air turbine which are sequentially connected, wherein the outlet of the air storage tank is connected with the air side of the heat collection working medium-compressed air heat exchanger, the air compressor is coaxially connected with the motor, the motor is connected with a first generator through a circuit, and the air turbine is coaxially connected with a second generator;
in the heat collection subsystem, an outlet of a heat collection working medium circulating pump, a heat collection working medium side of a condenser, a heat collection working medium side of a circulating hot air-heat collection working medium heat exchanger and a first three-way valve are sequentially connected through a pipeline; the first three-way valve is divided into two paths, the two paths are respectively connected with the heating and absorption refrigerator and then collected at the inlet of the second three-way valve, the pipeline is divided into two paths through the second three-way valve, one path passes through the heat collection working medium side of the heat collection working medium-compressed air heat exchanger and then is collected with the other path of pipeline and then is connected to the inlet of the heat collection working medium circulating pump, and the other path of pipeline is connected with the heat collection working medium circulating pump to form a loop.
2. The combined cooling heating and power system with the compressed air energy storage function for recycling the waste heat of the molten magnesium lead as recited in claim 1, wherein a high-temperature material block of the molten magnesium lead produced after being peeled and crushed is placed in the high-temperature heat exchange tower.
3. The combined cooling, heating and power system with the compressed air energy storage function for recovering the waste heat of the molten magnesium mound as recited in claim 2, wherein a multi-layer hollow material block slideway is arranged in the high-temperature heat exchange tower, and air passes through the material block slideway from bottom to top; when a new magnesium fused weight high-temperature material block is generated, the original high-temperature material block on each material block slideway is pushed into the next slideway by a mechanical device, and the new magnesium fused weight high-temperature material block is laid on the slideway on the uppermost layer.
4. The combined cooling, heating and power system with compressed air energy storage for recycling the waste heat of the molten magnesium lead as claimed in claim 1, wherein the molten magnesium lead waste heat recycling subsystem absorbs the waste heat of the high-temperature lump material of the molten magnesium lead by using circulating hot air, and then the waste heat is sent to the hot air side of the waste heat boiler to exchange heat with a power generation working medium, so that steam is generated for power generation.
5. The combined cooling, heating and power system with the compressed air energy storage function for recycling the waste heat of the molten magnesium mound as claimed in claim 1, wherein in the heat collecting system, a heat collecting working medium exchanges heat with the exhaust steam with lower temperature after the steam turbine applies work in a condenser, and then enters the circulating hot air-heat collecting working medium to exchange heat with the circulating hot air with higher temperature.
6. The combined cooling heating and power system with the compressed air energy storage function for recycling the waste heat of the molten magnesium lump as recited in claim 1, wherein in the compressed air energy storage subsystem, the first generator is connected with the motor through a circuit, the motor drives the air compressor to compress air, the temperature of the compressed air is increased and exchanges heat with cooling water through the compressed air-cooling water heat exchanger to realize heating, and the cooled compressed air is stored in the air storage tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102345983A (en) * | 2011-01-10 | 2012-02-08 | 沈阳东大工业炉有限公司 | Technology and device for recycling waste heat of electrically fused magnesia smelted block |
| CN102384663A (en) * | 2011-11-08 | 2012-03-21 | 大连易世达新能源发展股份有限公司 | Magnesia calcining rotary kiln carbon dioxide waste heat power generation device |
| CN103516037A (en) * | 2012-06-21 | 2014-01-15 | 饶宝其 | New technology for realizing cogeneration of industrial processes by utilization of thermoelectric material |
| CN110566440A (en) * | 2019-07-19 | 2019-12-13 | 东莞理工学院 | Advanced multi-energy complementary combined cooling heating and power compressed air energy storage system and application method |
| CN210637165U (en) * | 2019-05-28 | 2020-05-29 | 浙江亿扬能源科技有限公司 | Waste heat recycling device of coal mine in-use equipment |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US8572972B2 (en) * | 2009-11-13 | 2013-11-05 | General Electric Company | System and method for secondary energy production in a compressed air energy storage system |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102345983A (en) * | 2011-01-10 | 2012-02-08 | 沈阳东大工业炉有限公司 | Technology and device for recycling waste heat of electrically fused magnesia smelted block |
| CN102384663A (en) * | 2011-11-08 | 2012-03-21 | 大连易世达新能源发展股份有限公司 | Magnesia calcining rotary kiln carbon dioxide waste heat power generation device |
| CN103516037A (en) * | 2012-06-21 | 2014-01-15 | 饶宝其 | New technology for realizing cogeneration of industrial processes by utilization of thermoelectric material |
| CN210637165U (en) * | 2019-05-28 | 2020-05-29 | 浙江亿扬能源科技有限公司 | Waste heat recycling device of coal mine in-use equipment |
| CN110566440A (en) * | 2019-07-19 | 2019-12-13 | 东莞理工学院 | Advanced multi-energy complementary combined cooling heating and power compressed air energy storage system and application method |
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