CN112628701A - Gasification furnace heat supply system applied to chemical chain air separation coupling oxygen-enriched combustion system - Google Patents
Gasification furnace heat supply system applied to chemical chain air separation coupling oxygen-enriched combustion system Download PDFInfo
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- CN112628701A CN112628701A CN202011189236.6A CN202011189236A CN112628701A CN 112628701 A CN112628701 A CN 112628701A CN 202011189236 A CN202011189236 A CN 202011189236A CN 112628701 A CN112628701 A CN 112628701A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B1/00—Methods of steam generation characterised by form of heating method
- F22B1/22—Methods of steam generation characterised by form of heating method using combustion under pressure substantially exceeding atmospheric pressure
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- 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
- C10J3/02—Fixed-bed gasification of lump fuel
- C10J3/20—Apparatus; Plants
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B37/00—Component parts or details of steam boilers
- F22B37/02—Component parts or details of steam boilers applicable to more than one kind or type of steam boiler
- F22B37/22—Drums; Headers; Accessories therefor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/06—Arrangements of devices for treating smoke or fumes of coolers
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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
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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Abstract
The invention relates to a gasification furnace heat supply system applied to a chemical chain air separation coupling oxygen-enriched combustion system, which comprises a gasification furnace device; chemical chain air separation plant: comprises an oxygen absorption reactor, a oxygen release reactor and a heat supply component for heating the oxygen release reactor, wherein the oxygen absorption reactor and the oxygen release reactor are circularly communicated; oxygen-enriched combustion device: the system comprises a combustion boiler, wherein a gas outlet of a gasification furnace device is communicated with an inlet of a heat supply component, a gas outlet of a oxygen release reactor is respectively communicated with the gasification furnace device and the combustion boiler, and a steam outlet of the combustion boiler is communicated with the gasification furnace device. The invention solves the energy balance problem of the chemical-looping air separation oxygen generation system by adding the gasification furnace device for heat supply, fully utilizes the gas products of each subsystem in the system for gasification, heat supply, fluidization and other purposes, realizes low energy consumption and pollution-free oxygen generation of the chemical-looping air separation system, finally reduces the power generation energy consumption of the oxygen-enriched combustion system and improves the efficiency of the oxygen-enriched combustion system.
Description
Technical Field
The invention belongs to the technical field of oxygen-enriched combustion, and particularly relates to a heating system of a gasification furnace applied to a chemical-chain air separation coupling oxygen-enriched combustion system.
Background
The oxygen-enriched combustion adopts high-concentration oxygen to replace air and fuel for combustion, and about 70 percent of circulating flue gas is utilized for circulation, so that nitrogen in the traditional combustion-supporting air is replaced, and meanwhile, the temperature of a hearth is kept to be the same as the traditional combustion temperature. Because of N from air during combustion2Reduction, so thermal NOx is reduced; meanwhile, CO is mainly contained in the smoke product2And part of the steam, and obtaining high-purity CO through a simple post-treatment process2Realize CO2And (4) emission reduction and trapping.
The oxygen-enriched combustion has the advantages, but the main bottleneck at present is that the energy compensation of the air separation oxygen generation is too high, and the oxygen generation cost is too high. The existing mature method is a cryogenic air separation oxygen generation technology, can be used for large-scale oxygen generation in industrial production, and has the oxygen purity of over 99 percent, but the traditional cryogenic air separation deviceThe specific energy consumption is about 165 kWh/t O2It may consume 10% to 40% of the net output of the oxycombustion power plant.
The method is based on that an oxygen carrier respectively generates oxidation reaction, oxygen absorption reaction and reduction reaction and oxygen release reaction in an oxygen absorption reactor and an oxygen release reactor, and the oxygen carrier can perform the absorption and oxygen release reaction in the two reactors according to different oxygen partial pressures. Fluidizing gas (e.g. steam or CO) is typically introduced into the oxygen-releasing reactor2) The oxygen balance partial pressure is reduced to promote the oxygen release reaction to be generated positively, wherein the oxidation reaction is an exothermic reaction, the reduction reaction is an endothermic reaction, and the heat released and absorbed by the two reactions is basically balanced under an ideal condition, which is the reason that the chemical chain air separation can realize low-energy oxygen generation. The traditional way for maintaining the temperature of the reactor is through an electric heating device, but the utilization way needs to occupy a part of plant electric energy, so that the power generation efficiency of the whole system is reduced; in addition, a solar heating device is added to maintain the temperature of the oxygen release reactor, so that on one hand, the investment cost of the equipment at the early stage is too high, on the other hand, the energy cannot be continuously supplied due to the influence of weather and the surrounding environment, and the use of the reactor is limited due to the defects.
Disclosure of Invention
The invention aims to provide a heating system of a gasification furnace applied to a chemical-looping air separation coupling oxygen-enriched combustion system, which solves the problem that a temperature required by a reaction is difficult to maintain by a reactor in a chemical-looping air separation device, also fully utilizes gas products of subsystems in the system for gasification, heat supply, fluidization and other purposes, realizes oxygen production with low energy consumption and no pollution in the chemical-looping air separation system, and makes contribution to the application of an oxygen-enriched combustion technology.
In order to achieve the purpose, the invention adopts the technical scheme that:
a gasifier heating system applied to a chemical-looping air separation coupling oxygen-enriched combustion system comprises:
a gasification furnace unit;
chemical chain air separation plant: comprises an oxygen absorption reactor, an oxygen release reactor and a heat supply component for heating the oxygen release reactor, wherein the oxygen absorption reactor and the oxygen release reactor are communicated in a circulating way;
oxygen-enriched combustion device: comprises a combustion boiler, a gas-liquid separator and a gas-liquid separator,
the gas outlet of the gasification furnace device is communicated with the inlet of the heat supply component, the gas outlet of the oxygen release reactor is respectively communicated with the gasification furnace device and the combustion boiler, and the steam outlet of the combustion boiler is communicated with the gasification furnace device.
Preferably, the gasification furnace device comprises a gasification chamber and a combustion chamber, a gas outlet of the gasification chamber is communicated with the combustion chamber, a gas outlet of the combustion chamber is communicated with an inlet of the heat supply component, and a gas outlet of the oxygen release reactor and a steam outlet of the combustion boiler are both communicated with the gasification chamber.
Further preferably, the temperature of the combustion chamber is 1200-1300 ℃.
Preferably, the gasification furnace device is in the form of a fixed bed.
Preferably, the oxygen-enriched combustion device further comprises a tail gas processor, and the outlet of the heat supply component and the flue gas outlet of the combustion boiler are communicated with the tail gas processor. The tail gas processor is used for completing the compression and condensation treatment process of the tail gas generated by the gasification furnace device and the combustion boiler to obtain high-purity CO2。
Preferably, the flue gas outlet of the combustion boiler is communicated with the oxygen release reactor.
Preferably, the combustion boiler is provided with a steam drum, and the steam outlet of the combustion boiler is arranged on the steam drum.
Preferably, the oxygen carrier arranged in the oxygen absorption reactor and the oxygen release reactor comprises any one or combination of copper-based metal oxide, manganese-based metal oxide and cobalt-based metal oxide.
Further preferably, the oxygen carrier further comprises an inert metal oxide.
Preferably, the reaction temperature of the oxygen absorption reactor and the oxygen release reactor is 850-1050 ℃.
Preferably, the oxygen absorption reactor and the oxygen release reactor are fixed bed reactors, moving bed reactors or fluidized bed reactors.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages:
the invention solves the energy balance problem of the chemical-looping air separation oxygen generation system by adding the gasification furnace device for heat supply, fully utilizes the gas products of each subsystem in the system for gasification, heat supply, fluidization and other purposes, realizes low energy consumption and pollution-free oxygen generation of the chemical-looping air separation system, finally reduces the power generation energy consumption of the oxygen-enriched combustion system and improves the efficiency of the oxygen-enriched combustion system.
Drawings
FIG. 1 is a schematic diagram of the present embodiment.
Wherein: 10. a gasification chamber; 11. a combustion chamber; 20. an oxygen absorption reactor; 21. a oxygen release reactor; 22. a heat supply component; 30. a combustion boiler; 300. a steam drum; 31. a tail gas processor.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1, a heating system of a gasification furnace applied to a chemical-looping air separation coupling oxycombustion system mainly comprises three parts, namely a gasification furnace device, a chemical-looping air separation device, an oxycombustion device and the like. Wherein:
the gasification furnace apparatus includes a gasification chamber 10 and a combustion chamber 11. The furnace unit can be in the form of a fixed bed, and the temperature of the combustion chamber is 1200-1300 ℃.
The chemical chain air separation plant comprises an oxygen absorption reactor 20, an oxygen release reactor 21 and a heat supply component 22. The gas-oxygen absorption reactor 20 and the oxygen release reactor 21 can adopt a fixed bed reactor, a moving bed reactor or a fluidized bed reactor, the reaction temperature is 850-1050 ℃, and the oxygen carriers arranged in the gas-oxygen absorption reactor 20 and the oxygen release reactor 21 comprise copper-based metal oxide CuO/Cu2O, Mn-based metal oxide Mn2O3/ Mn3O4Cobalt-based metal oxide Co3O4Any one or combination of/CoO, and inert metal oxide can be matched as a carrier to improve the comprehensive performances of the oxygen carrier such as wear resistance, sintering resistance and the like.
The oxygen-enriched combustion device comprises a combustion boiler 30 and a tail gas processor 31, wherein the combustion boiler 30 is provided with a steam drum 300, and the combustion mode of the oxygen-enriched combustion device is flue gas circulation-oxygen-enriched combustion.
The connection relationship among the gasification furnace device, the chemical chain air separation device and the oxygen-enriched combustion device is as follows: the gas outlet of the gasification chamber 10 is communicated with the combustion chamber 10, the gas outlet of the combustion chamber 10 is communicated with the inlet of the heat supply component 22, and the outlet of the heat supply component 22 is communicated with the tail gas processor 31; the oxygen absorption reactor 20 and the oxygen release reactor 21 are communicated in a circulating way, and the gas outlet of the oxygen release reactor 21 is respectively communicated with the gasification chamber 10 and the combustion boiler 30; the steam outlet of the steam drum 300 in the combustion boiler 30 is communicated with the gasification chamber 10, and the flue gas outlet of the combustion boiler 30 is communicated with the oxygen release reactor 21 and the tail gas processor 31.
The following specifically explains the working principle of the present embodiment:
feeding fuel coal and a gasifying agent into the gasification chamber 10, wherein: part of the gas product (O) of the oxygen release reactor 21 in the system interior2+CO2+H2O) and part of the steam drum 300 in the combustion boiler 30 are introduced into the gasification chamber 10 as a gasifying agent, the generated gasification product is then introduced into the combustion chamber 11 for combustion, and the generated high-temperature tail gas (CO) is generated2+H2O) enters the heat supply component 22, and the heat supply component 22 provides additional heat for the oxygen release reactor 21 so that the oxygen release reactor can continuously release oxygen at a certain temperature, and finally the tail gas is introduced into the tail gas processor 31 for processing.
The low potential oxygen carrier and air are subjected to chemical combination reaction in an oxygen absorption reactor 20 to become a high potential oxygen carrier and finish oxygen absorption, and then the high potential oxygen carrier is sent into an oxygen release reactor 21; a part of the flue gas of the combustion boiler 30 is separated to be used as circulating flue gas, the circulating flue gas is introduced into the oxygen release reactor 21 to control the oxygen partial pressure, high potential oxygen carriers in the oxygen release reactor 21 are decomposed under certain oxygen partial pressure and temperature conditions to complete oxygen release, and the oxygen carriers after the reaction are sent into the oxygen absorption reactor 21 to complete circulation.
The majority of the gaseous products (O) produced by the oxygen release reactor 212+CO2+H2O) enters the combustion boiler 30 to generate CO through violent combustion reaction with fuel2The residual flue gas removed from the flue gas as the circulating flue gas and the tail gas generated by the gasification furnace device enter a tail gas processor 31 together for purification, drying, compression and condensationAnd after separation, obtaining CO of high purity2。
In this embodiment: the heat of the flue gas of the gasification furnace device is utilized to maintain the higher reduction temperature of the oxygen release reactor, so that the oxygen release reactor is promoted to generate gas products of oxygen with higher concentration, and the low energy consumption and pollution-free oxygen generation of a chemical-chain air separation system are realized; by sharing one set of tail gas processor, the tail gas of the gasification furnace and the tail gas of the combustion boiler are subjected to simple condensation treatment to obtain high-purity CO2(ii) a The flue gas of the combustion boiler is introduced into the oxygen release reactor to be used as fluidizing gas, so that oxygen generation with low energy consumption is realized, and the overall efficiency of the oxygen-enriched combustion device is further improved.
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (10)
1. The utility model provides a gasifier heating system for empty coupling oxygen boosting combustion system that divides of chemical chain which characterized in that: the method comprises the following steps:
a gasification furnace unit;
chemical chain air separation plant: comprises an oxygen absorption reactor, an oxygen release reactor and a heat supply component for heating the oxygen release reactor, wherein the oxygen absorption reactor and the oxygen release reactor are communicated in a circulating way;
oxygen-enriched combustion device: comprises a combustion boiler, a gas-liquid separator and a gas-liquid separator,
the gas outlet of the gasification furnace device is communicated with the inlet of the heat supply component, the gas outlet of the oxygen release reactor is respectively communicated with the gasification furnace device and the combustion boiler, and the steam outlet of the combustion boiler is communicated with the gasification furnace device.
2. The gasification furnace heat supply system applied to the chemical-looping air separation coupling oxygen-enriched combustion system according to claim 1, is characterized in that: the gasification furnace device comprises a gasification chamber and a combustion chamber, wherein a gas outlet of the gasification chamber is communicated with the combustion chamber, a gas outlet of the combustion chamber is communicated with an inlet of the heat supply component, and a gas outlet of the oxygen release reactor and a steam outlet of the combustion boiler are communicated with the gasification chamber.
3. The gasification furnace heat supply system applied to the chemical-looping air separation coupling oxygen-enriched combustion system according to claim 2, is characterized in that: the temperature of the combustion chamber is 1200-1300 ℃.
4. The gasification furnace heat supply system applied to the chemical-looping air separation coupling oxygen-enriched combustion system according to claim 1, is characterized in that: the oxygen-enriched combustion device also comprises a tail gas processor, and the outlet of the heat supply component and the smoke outlet of the combustion boiler are communicated with the tail gas processor.
5. The gasification furnace heat supply system applied to the chemical-looping air separation coupling oxygen-enriched combustion system according to claim 1, is characterized in that: and the smoke outlet of the combustion boiler is communicated with the oxygen release reactor.
6. The gasification furnace heat supply system applied to the chemical-looping air separation coupling oxygen-enriched combustion system according to claim 1, is characterized in that: the combustion boiler is provided with a steam drum, and a steam outlet of the combustion boiler is arranged on the steam drum.
7. The gasification furnace heat supply system applied to the chemical-looping air separation coupling oxygen-enriched combustion system according to claim 1, is characterized in that: the oxygen carrier arranged in the oxygen absorption reactor and the oxygen release reactor comprises any one or combination of copper-based metal oxide, manganese-based metal oxide and cobalt-based metal oxide.
8. The gasification furnace heat supply system applied to the chemical-looping air separation coupling oxygen-enriched combustion system according to claim 7, is characterized in that: the oxygen carrier also includes an inert metal oxide.
9. The gasification furnace heat supply system applied to the chemical-looping air separation coupling oxygen-enriched combustion system according to claim 1, is characterized in that: the reaction temperature of the oxygen absorption reactor and the oxygen release reactor is 850-1050 ℃.
10. The gasification furnace heat supply system applied to the chemical-looping air separation coupling oxygen-enriched combustion system according to claim 1, is characterized in that: the oxygen absorption reactor and the oxygen release reactor are fixed bed reactors, moving bed reactors or fluidized bed reactors.
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| CN202011189236.6A CN112628701A (en) | 2020-10-30 | 2020-10-30 | Gasification furnace heat supply system applied to chemical chain air separation coupling oxygen-enriched combustion system |
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| CN202011189236.6A CN112628701A (en) | 2020-10-30 | 2020-10-30 | Gasification furnace heat supply system applied to chemical chain air separation coupling oxygen-enriched combustion system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113140766A (en) * | 2021-04-20 | 2021-07-20 | 大连海事大学 | Zero-carbon-emission fuel cell system for hydrogen production by ethanol reforming |
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2020
- 2020-10-30 CN CN202011189236.6A patent/CN112628701A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113140766A (en) * | 2021-04-20 | 2021-07-20 | 大连海事大学 | Zero-carbon-emission fuel cell system for hydrogen production by ethanol reforming |
| CN113140766B (en) * | 2021-04-20 | 2024-04-30 | 大连海事大学 | Zero-carbon-emission ethanol reforming hydrogen production fuel cell system |
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