CN219929978U - Solid waste gasification and biomass pyrolysis and coal-fired power plant integrated poly-generation system - Google Patents
Solid waste gasification and biomass pyrolysis and coal-fired power plant integrated poly-generation system Download PDFInfo
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- 239000002028 Biomass Substances 0.000 title claims abstract description 61
- 238000002309 gasification Methods 0.000 title claims abstract description 43
- 239000002910 solid waste Substances 0.000 title claims abstract description 21
- 238000000197 pyrolysis Methods 0.000 title claims abstract description 19
- 239000007789 gas Substances 0.000 claims abstract description 77
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 62
- 239000000446 fuel Substances 0.000 claims abstract description 50
- 230000015572 biosynthetic process Effects 0.000 claims abstract description 46
- 238000003786 synthesis reaction Methods 0.000 claims abstract description 46
- 239000013535 sea water Substances 0.000 claims abstract description 43
- 238000009272 plasma gasification Methods 0.000 claims abstract description 35
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 33
- 238000010612 desalination reaction Methods 0.000 claims abstract description 32
- 229910002092 carbon dioxide Inorganic materials 0.000 claims abstract description 31
- 239000001569 carbon dioxide Substances 0.000 claims abstract description 31
- 239000002906 medical waste Substances 0.000 claims abstract description 28
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims abstract description 15
- 239000013505 freshwater Substances 0.000 claims abstract description 15
- 229910052739 hydrogen Inorganic materials 0.000 claims abstract description 15
- 239000001257 hydrogen Substances 0.000 claims abstract description 15
- 239000000203 mixture Substances 0.000 claims abstract description 15
- 238000001704 evaporation Methods 0.000 claims abstract description 9
- 230000008020 evaporation Effects 0.000 claims abstract description 9
- 239000012267 brine Substances 0.000 claims abstract description 7
- 238000002156 mixing Methods 0.000 claims abstract description 7
- 238000004064 recycling Methods 0.000 claims abstract description 7
- HPALAKNZSZLMCH-UHFFFAOYSA-M sodium;chloride;hydrate Chemical compound O.[Na+].[Cl-] HPALAKNZSZLMCH-UHFFFAOYSA-M 0.000 claims abstract description 7
- 238000007599 discharging Methods 0.000 claims abstract description 5
- 238000002407 reforming Methods 0.000 claims description 7
- 230000005484 gravity Effects 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
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- 239000010813 municipal solid waste Substances 0.000 abstract description 7
- 230000007613 environmental effect Effects 0.000 abstract description 6
- 230000000694 effects Effects 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 description 13
- 239000002918 waste heat Substances 0.000 description 10
- 239000002699 waste material Substances 0.000 description 7
- 239000000126 substance Substances 0.000 description 6
- 238000010248 power generation Methods 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000011084 recovery Methods 0.000 description 4
- 239000010802 sludge Substances 0.000 description 3
- 239000000779 smoke Substances 0.000 description 3
- 238000009270 solid waste treatment Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000003487 electrochemical reaction Methods 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 239000010781 infectious medical waste Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000007800 oxidant agent Substances 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
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- 230000008859 change Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000011033 desalting Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
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- 231100001261 hazardous Toxicity 0.000 description 1
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- 238000011069 regeneration method Methods 0.000 description 1
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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
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
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Abstract
The utility model provides a poly-generation system integrating solid waste gasification, biomass pyrolysis and a coal-fired power plant, belonging to the field of garbage treatment, comprising: the plasma gasification subsystem is used for burning medical waste to obtain hydrogen-rich synthetic gas; the fuel cell subsystem is used for enabling the hydrogen-rich synthetic gas to electrochemically react with air to generate electric energy and discharging first synthetic gas; the biomass gasification subsystem is used for gasifying the mixture of biomass and water to generate second synthesis gas, mixing the first synthesis gas with the second synthesis gas, then burning the mixture, and discharging third synthesis gas; the supercritical carbon dioxide circulation subsystem is used for carrying out heat exchange treatment on the third synthesis gas to generate electric energy and heat energy; the seawater desalination subsystem is used for carrying out multistage flash evaporation on seawater by utilizing heat energy generated by the supercritical carbon dioxide circulation subsystem to obtain fresh water and strong brine. The utility model can carry out recycling and environmental protection treatment on medical waste, and realizes the effect of multi-functional complementation.
Description
Technical Field
The utility model relates to the field of garbage treatment, in particular to a poly-generation system integrating solid waste gasification, biomass pyrolysis and coal-fired power stations.
Background
The garbage incineration is a main mode of garbage disposal, and the heat released by the incineration can be used for power generation, heat supply, cold supply and the like, and has the advantages of reduction, harmlessness, recycling and the like. However, the power generation efficiency of the garbage incineration power generator set is only 18% -25%.
Medical waste is a hazardous and infectious waste produced by hospitals, clinics and other medical facilities, and from 2019 the proportion of medical waste in municipal solid waste has gradually increased, resulting in a substantial increase in potentially infectious medical waste, which in turn has led to further health and environmental threats. Thus, there is a need for a system that enables efficient and sustainable management of medical waste.
Disclosure of Invention
The utility model aims to provide a poly-generation system integrating solid waste gasification, biomass pyrolysis and coal-fired power stations, which can realize the recycling and environmental protection treatment of medical wastes and realize multi-energy complementation.
In order to achieve the above object, the present utility model provides the following solutions:
a polygeneration system integrating solid waste gasification and biomass pyrolysis with a coal-fired power plant, comprising:
the plasma gasification subsystem is used for burning medical waste to obtain hydrogen-rich synthetic gas;
the anode of the fuel cell subsystem is connected with the plasma gasification subsystem, the cathode is filled with air, and the fuel cell subsystem is used for enabling the hydrogen-rich synthetic gas to react with the air electrochemically to generate electric energy and discharging first synthetic gas;
the biomass gasification subsystem is connected with the fuel cell subsystem and is used for gasifying a mixture of biomass and water to generate second synthesis gas, mixing the first synthesis gas with the second synthesis gas and then burning the mixture to discharge third synthesis gas;
the supercritical carbon dioxide circulation subsystem is connected with the biomass gasification subsystem and is used for carrying out heat exchange treatment on the third synthesis gas to generate electric energy and heat energy;
the seawater desalination subsystem is connected with the supercritical carbon dioxide circulation subsystem and is filled with seawater, and the seawater desalination subsystem is used for carrying out multistage flash evaporation on the seawater by utilizing heat energy generated by the supercritical carbon dioxide circulation subsystem to obtain fresh water and strong brine.
Optionally, the plasma gasification subsystem comprises:
the plasma gasification furnace is used for burning medical waste to obtain primary synthesis gas;
and the reforming reactor is connected with the plasma gasification furnace and is used for improving the specific gravity of hydrogen in the primary synthesis gas to obtain hydrogen-rich synthesis gas.
Optionally, the fuel cell subsystem is a solid oxide fuel cell.
Optionally, the polygeneration system integrated with the coal-fired power plant by solid waste gasification and biomass pyrolysis further comprises:
and the compressor is connected with the cathode of the fuel cell subsystem and is used for pressurizing air and then sending the air into the cathode of the fuel cell subsystem.
Optionally, the biomass gasification subsystem comprises:
the biomass gasification furnace is used for gasifying the mixture of biomass and water to generate second synthesis gas;
and the afterburner is respectively connected with the biomass gasifier, the fuel cell subsystem and the supercritical carbon dioxide circulating subsystem and is used for mixing the first synthesis gas with the second synthesis gas and then burning the mixture to discharge third synthesis gas.
Optionally, the supercritical carbon dioxide circulation subsystem comprises: the device comprises a first heat exchanger, a second heat exchanger, a first heat regenerator, a second heat regenerator, a turbine, a first water pump, a second water pump and a condenser;
the high-temperature inlet of the first heat exchanger is connected with the biomass gasification subsystem, the high-temperature outlet of the first heat exchanger is connected with the high-temperature inlet of the second heat exchanger, the low-temperature outlet of the first heat exchanger is connected with the inlet of the turbine, and the low-temperature inlet of the first heat exchanger is connected with the low-temperature outlet of the first heat regenerator;
the low-temperature inlet of the first heat regenerator is respectively connected with the outlet of the first water pump and the low-temperature outlet of the second heat regenerator, the high-temperature inlet of the first heat regenerator is connected with the outlet of the turbine, and the high-temperature outlet of the first heat regenerator is connected with the high-temperature inlet of the second heat regenerator;
the turbine is used for generating electric energy by expansion work;
the low-temperature inlet of the second heat regenerator is connected with the outlet of the second water pump, and the high-temperature outlet of the second heat regenerator is respectively connected with the inlet of the condenser and the inlet of the first water pump;
the outlet of the condenser is connected with the inlet of the second water pump;
the low-temperature inlet and the low-temperature outlet of the second heat exchanger are connected with the sea water desalination subsystem and form circulation with the sea water desalination subsystem. According to the specific embodiment provided by the utility model, the utility model discloses the following technical effects:
the utility model applies the plasma gasification technology to the treatment of medical waste, and uses the fuel cell to make the hydrogen-rich synthetic gas and air produce electrochemical reaction to produce electric energy and electricity, discharges the first synthetic gas, gasifies the mixture of biomass and water through the biomass gasification subsystem to produce the second synthetic gas, mixes the first synthetic gas and the second synthetic gas and then burns, discharges the third synthetic gas, carries out heat exchange treatment on the third synthetic gas through the supercritical carbon dioxide circulation subsystem to produce electric energy and heat energy, carries out multistage flash evaporation on the sea water through the heat energy produced by the supercritical carbon dioxide circulation subsystem by the sea water desalination subsystem to obtain fresh water and strong brine, can fully treat medical waste and biomass waste, simultaneously produces electric energy, and the rest heat can also be fully utilized by the sea water desalination subsystem to produce fresh water, so that resources can be efficiently utilized, and finally, the recycling and environmental protection treatment of the medical waste are realized, and the effect of multi-energy complementation is realized.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions of the prior art, the drawings that are needed in the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural diagram of a polygeneration system integrating solid waste gasification and biomass pyrolysis with a coal-fired power plant.
Symbol description:
the system comprises a plasma gasification subsystem-1, a plasma gasification furnace-11, a reforming reactor-12, a fuel cell subsystem-2, a biomass gasification subsystem-3, a biomass gasification furnace-31, a afterburner-32, a supercritical carbon dioxide circulation subsystem-4, a first heat exchanger-41, a second heat exchanger-42, a first heat regenerator-43, a second heat regenerator-44, a turbine-45, a first water pump-46, a second water pump-47, a condenser-48, a sea water desalination subsystem-5 and a gas compressor-6.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
The utility model aims to provide a poly-generation system integrating solid waste gasification, biomass pyrolysis and a coal-fired power plant, which can realize efficient energy conversion, environmental protection and energy conservation, low carbon emission and recycling of solid waste resources while meeting reasonable treatment and resource utilization of garbage, and can be conveniently combined with the coal-fired power plant to solve the problem of waste heat utilization of the coal-fired power plant.
In order that the above-recited objects, features and advantages of the present utility model will become more readily apparent, a more particular description of the utility model will be rendered by reference to the appended drawings and appended detailed description.
As shown in fig. 1, the present utility model provides a polygeneration system integrating solid waste gasification and biomass pyrolysis with a coal-fired power plant, comprising: a plasma gasification subsystem 1, a fuel cell subsystem 2, a biomass gasification subsystem 3, a supercritical carbon dioxide circulation subsystem 4 and a sea water desalination subsystem 5.
The plasma gasification subsystem 1 is used for burning medical waste to obtain hydrogen-rich synthetic gas.
The plasma gasification is a latest technology for gasifying medical waste in the plasma gasification furnace 11 by a plasma technology, a high-energy thermal environment is manufactured by utilizing a plasma arc generated by a plasma igniter, a proper proportion of plasma gasifying agent is introduced, and a series of complex chemical reactions are generated in the thermal environment in a plasma active state to generate a main component H 2 The combustible gas of CO has the advantages of high purity and cleanness. Plasma gasification has proven to be one of the most efficient and environmentally friendly methods for solid waste treatment and energy utilization, and plasma technology has been widely used in the fields of machining, metallurgy, chemical industry, etc., and in the aspect of solid waste treatment, the research of plasma gasification technology is also being conducted.
Specifically, the plasma gasification subsystem 1 includes a plasma gasification furnace 11 and a reforming reactor 12. The plasma gasifier 11 is used for burning medical waste to obtain primary synthesis gas. The reforming reactor 12 is connected with the plasma gasifier 11, and the reforming reactor 12 is used for increasing the specific gravity of the hydrogen in the primary synthesis gas to obtain the hydrogen-rich synthesis gas, which is beneficial to the full utilization of the subsequent fuel cells.
The anode of the fuel cell subsystem 2 is connected with the plasma gasification subsystem 1, air is introduced into the cathode, the fuel cell subsystem 2 is used for enabling the hydrogen-rich synthesis gas to electrochemically react with the air to generate electric energy, and the first synthesis gas is discharged.
The electric energy generated by the fuel cell subsystem 2 supplies power to a plasma gasification subsystem (a plasma gasification furnace 11), so that the multi-energy complementation is realized.
In this embodiment, the fuel cell subsystem 2 is a solid oxide fuel cell. Oxide fuel cells use synthesis gas to react electrochemically with an oxidant to create an electrical potential difference within the cell.
A fuel cell is a power generation device that directly converts chemical energy present in fuel and oxidant into electrical energy. The fuel cell can directly convert chemical energy of fuel into electric energy, so that the fuel cell is not limited by Carnot cycle, and therefore, the fuel cell does not have energy form change of a boiler, a steam turbine and a generator like a common thermal generator, can avoid intermediate conversion loss, has high energy conversion efficiency, further improves the power generation efficiency, and provides an environment-friendly way for treatment of medical waste.
Further, the poly-generation system integrating solid waste gasification and biomass pyrolysis with the coal-fired power plant further comprises: and the compressor 6 is connected with the cathode of the fuel cell subsystem 2 and is used for pressurizing air and then sending the air into the cathode of the fuel cell subsystem 2.
The biomass gasification subsystem 3 is connected with the fuel cell subsystem 2, and the biomass gasification subsystem 3 is used for gasifying a mixture of biomass and water to generate second synthesis gas, mixing the first synthesis gas with the second synthesis gas, then burning the mixture, and discharging third synthesis gas.
Specifically, biomass gasification subsystem 3 includes: a biomass gasifier 31 and a afterburner 32. The biomass gasifier 31 is used for gasifying a mixture of biomass and water to generate a second synthesis gas (raw gas). The biomass gasification furnace 31 may gasify sludge, coal, or the like to obtain raw gas.
The afterburner 32 is respectively connected with the biomass gasifier 31, the fuel cell subsystem 2 and the supercritical carbon dioxide circulation subsystem 4, and the afterburner 32 is used for mixing the first synthesis gas with the second synthesis gas and then burning the mixture to discharge third synthesis gas. Specifically, the afterburner 32 fully burns the exhaust gas from the fuel cell and the raw gas of the gasifier, fully releases chemical energy therein, and increases the exhaust gas temperature so as to facilitate the energy utilization of the next stage, thereby realizing the full utilization of the chemical energy in the exhaust gas of the fuel cell.
The biomass waste such as sludge is gasified in the gasifier to generate synthetic gas, and then is connected with the afterburner 32, so that the biomass is recycled and utilized in an environment-friendly way, the full utilization of energy and the complementation of multiple energies are realized, and a new environment-friendly direction is provided for the current solid waste treatment.
The supercritical carbon dioxide circulation subsystem 4 is connected with the biomass gasification subsystem 3, and the supercritical carbon dioxide circulation subsystem 4 is used for carrying out heat exchange treatment on the third synthesis gas to generate electric energy and heat energy, so that the efficient utilization of waste heat is realized.
Specifically, the supercritical carbon dioxide circulation subsystem 4 includes: a first heat exchanger 41, a second heat exchanger 42, a first regenerator 43, a second regenerator 44, a turbine 45, a first water pump 46, a second water pump 47, and a condenser 48. In the present embodiment, the first regenerator 43 is a high temperature regenerator, and the second regenerator 44 is a low temperature regenerator.
The high temperature inlet of the first heat exchanger 41 is connected with the biomass gasification subsystem 3, the high temperature outlet of the first heat exchanger 41 is connected with the high temperature inlet of the second heat exchanger 42, the low temperature outlet of the first heat exchanger 41 is connected with the inlet of the turbine 45, and the low temperature inlet of the first heat exchanger 41 is connected with the low temperature outlet of the first heat regenerator 43. The exhaust gas fully combusted through the afterburner chamber 32 is subjected to energy exchange by the first heat exchanger 41.
The low temperature inlet of the first heat regenerator 43 is connected with the outlet of the first water pump 46 and the low temperature outlet of the second heat regenerator 44, the high temperature inlet of the first heat regenerator 43 is connected with the outlet of the turbine 45, and the high temperature outlet of the first heat regenerator 43 is connected with the high temperature inlet of the second heat regenerator 44.
The turbine 45 is used for generating electric energy by expansion work.
The low temperature inlet of the second regenerator 44 is connected to the outlet of the second water pump 47, and the high temperature outlet of the second regenerator 44 is connected to the inlet of the condenser 48 and the inlet of the first water pump 46, respectively.
The outlet of the condenser 48 is connected to the inlet of the second water pump 47.
The low-temperature inlet and the low-temperature outlet of the second heat exchanger 42 are connected with the sea water desalination subsystem 5, and form a circulation with the sea water desalination subsystem 5. The heat is transferred to the sea water desalination subsystem 5 through the second heat exchanger 42, and fresh water is separated from sea water in a multistage flash evaporation mode, so that the cascade utilization of energy is realized, and meanwhile, the economic value can be created.
Specifically, the high-temperature and high-pressure carbon dioxide at the outlet of the first heat exchanger 41 enters the turbine 45 to expand and do work; the carbon dioxide at the outlet of the turbine 45 sequentially passes through the high-temperature heat regenerator and the low-temperature heat regenerator to release heat, the carbon dioxide at the outlet of the low-temperature heat regenerator is divided into two parts, one part is connected with the condenser 48 and the outlet of the second water pump 47 and the low-temperature measuring inlet of the second heat exchanger 42, the other part is pressurized by cooling, the high-pressure carbon dioxide at the outlet of the compressor and the high-pressure carbon dioxide at the outlet of the low-temperature heat regenerator are mixed and then enter the high-temperature heat regenerator, and the high-temperature high-pressure carbon dioxide at the outlet enters the turbine 45, so that the whole cycle is completed.
The supercritical carbon dioxide circulation subsystem 4 adopts a double-heat-recovery system and is provided with two heat exchangers, a high-temperature heat recovery device and a low-temperature heat recovery device, so that the utilization rate of energy is greatly improved, and the full utilization of energy is realized.
The seawater desalination subsystem 5 is connected with the supercritical carbon dioxide circulation subsystem 4 and is filled with seawater, and the seawater desalination subsystem 5 is used for carrying out multistage flash evaporation on the seawater by utilizing the heat energy generated by the supercritical carbon dioxide circulation subsystem 4 to obtain fresh water and strong brine.
The seawater desalination subsystem 5 adopts a multistage flash evaporation technology, has large yield, mature technology, high operation safety and high elasticity, is mainly combined with a coal-fired power plant for construction, and is suitable for large-scale and ultra-large-scale desalination devices. The multistage flash evaporation technology is mature and reliable in operation, and the main development trend is to improve the single water making capacity of the device, reduce the unit power consumption, improve the heat transfer efficiency and the like.
The temperature of the seawater desalination subsystem 5 is increased by the second heat exchanger 42, so that the seawater flowing through the seawater desalination subsystem 5 is flashed step by step, and then fresh water and strong brine are obtained. The sea water desalination subsystem 5 utilizes the system waste heat to produce fresh water, so that the full utilization of energy is realized, the economical efficiency of the system is improved by producing fresh water, meanwhile, the sea water desalination subsystem 5 can be combined with a coal-fired power plant, and the fresh water production is performed by utilizing the coal-fired power plant waste heat, so that the sea water desalination subsystem is a waste heat utilization technology with extremely strong plasticity.
The utility model applies the plasma gasification technology to the treatment of medical waste, and uses the electric energy generated by the fuel cell to supply power to the plasma gasification furnace 11, creatively provides a combined heat and power generation system integrating the plasma gasification of the waste, the fuel cell, the biomass gasification, the supercritical carbon dioxide circulation and the sea water desalination, can fully treat the biomass waste such as the medical waste, the sludge and the like and simultaneously generate the electric energy, and finally the residual heat can be fully utilized by the sea water desalination system to produce fresh water, so that the resources can be efficiently utilized.
The working process of the poly-generation system integrating solid waste gasification, biomass pyrolysis and coal-fired power stations is as follows:
medical waste enters a plasma gasification furnace to generate synthetic gas, the synthetic gas is introduced into a fuel cell, the fuel cell generates electric energy through electrochemical reaction, part of the generated electric power supplies power for the plasma gasification furnace, and the unreacted synthetic gas is introduced into a afterburner to be fully combusted to release chemical energy. The biomass gasification subsystem is used for fully pyrolyzing biomass such as sewage sludge, and the like, the generated raw gas is introduced into a afterburner and is mixed with smoke discharged from a fuel cell, and then is fully combusted in the afterburner, so that the smoke discharge temperature is increased, then a first heat exchanger is used for carrying out heat exchange, a part of heat enters a supercritical carbon dioxide circulation subsystem, and a turbine is used for expansion work to generate electric energy. The flow flowing out of the low-temperature heat regenerator is divided into two flows, one flow is connected with a first water pump and then enters the high-temperature heat regenerator, the other flow is connected with a condenser and a second water pump and then flows into the low-temperature heat regenerator, and the outlet flow of the first water pump is mixed with the outlet flow of the low-temperature heat regenerator and then is connected with the inlet of the high-temperature heat regenerator, so that a double loop is formed, the waste heat is efficiently utilized, the temperature of a sea water desalination subsystem is increased, the sea water flowing through the sea water desalination subsystem is subjected to flash evaporation step by step, and fresh water and strong brine are obtained.
In summary, the utility model has the following beneficial effects:
1. realizes the treatment of recycling and environmental protection of medical waste. Aiming at the problem that medical waste is difficult to effectively treat, creatively combines a plasma gasification technology, a fuel cell and a waste heat utilization technology, and provides an integrated waste plasma gasification, fuel cell, biomass gasification and supercritical CO 2 And a cogeneration system coupled with sea water desalination. Specifically, medical waste enters a plasma gasification furnace to generate synthesis gas, and H in the synthesis gas is lifted by using a reforming reactor 2 After the concentration of the waste is reached, the waste is introduced into a fuel cell to generate electric energy, and a part of the electric energy is supplied to a plasma gasification furnace, so that not only is the medical waste treated, but also the solid waste resources are regenerated while the pollution to the environment is prevented, and the resource regeneration and the environment-friendly treatment of the medical waste are realized.
2. Realizes the recovery of waste heat of discharged smoke, achieves the aims of energy conservation and consumption reduction, and is supercritical CO 2 The circulation provides heat, improves the energy utilization rate, and realizes the energy cascade utilization. Meanwhile, the fuel cell generates electricity to supply power for the plasma gasification furnace, so that the multi-energy complementation is realized.
3. Due to the advantages of the modularized fuel cell, the system has reduced site selection requirements for construction, can be built near coastal cities, can produce medical wastes daily, has huge transportation cost, is applied near coastal cities, realizes convenience and rapidity of medical waste treatment, and simultaneously has the advantages of fuel cells and supercritical CO 2 The generated electric energy can supply power for cities, so that the rapid cleaning treatment of medical waste is ensured, the electric power supply for cities is also ensured, and the sea water desalting device can be utilized to provide fresh water for coasts.
4. The seawater desalination device is a very flexible waste heat utilization device, can be combined with a coal-fired power plant, and can be used for fresh water output by combining waste heat of the coal-fired power plant, so that the seawater desalination device is a waste heat utilization technology with extremely strong plasticity, and the energy cascade utilization is realized.
The principles and embodiments of the present utility model have been described herein with reference to specific examples, the description of which is intended only to facilitate an understanding of the system of the present utility model and its core ideas; also, it is within the scope of the present utility model to be modified by those of ordinary skill in the art in light of the present teachings. In view of the foregoing, this description should not be construed as limiting the utility model.
Claims (6)
1. A polygeneration system integrated with a coal-fired power plant by solid waste gasification and biomass pyrolysis, characterized in that the polygeneration system integrated with the coal-fired power plant by solid waste gasification and biomass pyrolysis comprises:
the plasma gasification subsystem is used for burning medical waste to obtain hydrogen-rich synthetic gas;
the anode of the fuel cell subsystem is connected with the plasma gasification subsystem, the cathode is filled with air, and the fuel cell subsystem is used for enabling the hydrogen-rich synthetic gas to react with the air electrochemically to generate electric energy and discharging first synthetic gas;
the biomass gasification subsystem is connected with the fuel cell subsystem and is used for gasifying a mixture of biomass and water to generate second synthesis gas, mixing the first synthesis gas with the second synthesis gas and then burning the mixture to discharge third synthesis gas;
the supercritical carbon dioxide circulation subsystem is connected with the biomass gasification subsystem and is used for carrying out heat exchange treatment on the third synthesis gas to generate electric energy and heat energy;
the seawater desalination subsystem is connected with the supercritical carbon dioxide circulation subsystem and is filled with seawater, and the seawater desalination subsystem is used for carrying out multistage flash evaporation on the seawater by utilizing heat energy generated by the supercritical carbon dioxide circulation subsystem to obtain fresh water and strong brine.
2. The polygeneration system integrated with a coal-fired power plant for solid waste gasification and biomass pyrolysis of claim 1, wherein the plasma gasification subsystem comprises:
the plasma gasification furnace is used for burning medical waste to obtain primary synthesis gas;
and the reforming reactor is connected with the plasma gasification furnace and is used for improving the specific gravity of hydrogen in the primary synthesis gas to obtain hydrogen-rich synthesis gas.
3. The polygeneration system integrated with a coal-fired power plant for solid waste gasification and biomass pyrolysis according to claim 1, wherein the fuel cell subsystem is a solid oxide fuel cell.
4. The polygeneration system integrated with a coal-fired power plant for solid waste gasification and biomass pyrolysis of claim 1, further comprising:
and the compressor is connected with the cathode of the fuel cell subsystem and is used for pressurizing air and then sending the air into the cathode of the fuel cell subsystem.
5. The integrated polygeneration system of solid waste gasification and biomass pyrolysis with coal-fired power plant of claim 1, wherein the biomass gasification subsystem comprises:
the biomass gasification furnace is used for gasifying the mixture of biomass and water to generate second synthesis gas;
and the afterburner is respectively connected with the biomass gasifier, the fuel cell subsystem and the supercritical carbon dioxide circulating subsystem and is used for mixing the first synthesis gas with the second synthesis gas and then burning the mixture to discharge third synthesis gas.
6. The integrated polygeneration system for solid waste gasification and biomass pyrolysis and coal burning power plant of claim 1, wherein the supercritical carbon dioxide recycling subsystem comprises: the device comprises a first heat exchanger, a second heat exchanger, a first heat regenerator, a second heat regenerator, a turbine, a first water pump, a second water pump and a condenser;
the high-temperature inlet of the first heat exchanger is connected with the biomass gasification subsystem, the high-temperature outlet of the first heat exchanger is connected with the high-temperature inlet of the second heat exchanger, the low-temperature outlet of the first heat exchanger is connected with the inlet of the turbine, and the low-temperature inlet of the first heat exchanger is connected with the low-temperature outlet of the first heat regenerator;
the low-temperature inlet of the first heat regenerator is respectively connected with the outlet of the first water pump and the low-temperature outlet of the second heat regenerator, the high-temperature inlet of the first heat regenerator is connected with the outlet of the turbine, and the high-temperature outlet of the first heat regenerator is connected with the high-temperature inlet of the second heat regenerator;
the turbine is used for generating electric energy by expansion work;
the low-temperature inlet of the second heat regenerator is connected with the outlet of the second water pump, and the high-temperature outlet of the second heat regenerator is respectively connected with the inlet of the condenser and the inlet of the first water pump;
the outlet of the condenser is connected with the inlet of the second water pump;
the low-temperature inlet and the low-temperature outlet of the second heat exchanger are connected with the sea water desalination subsystem and form circulation with the sea water desalination subsystem.
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