CN112029518A - System and method for preparing activated carbon by integrating carbonization and activation of coal/biomass - Google Patents
System and method for preparing activated carbon by integrating carbonization and activation of coal/biomass Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B53/00—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B43/00—Preventing or removing incrustations
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B53/00—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
- C10B53/02—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form of cellulose-containing material
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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
- C10J3/46—Gasification of granular or pulverulent flues in suspension
- C10J3/54—Gasification of granular or pulverulent fuels by the Winkler technique, i.e. by fluidisation
- C10J3/56—Apparatus; Plants
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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
- C10J3/72—Other features
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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
- C10J3/72—Other features
- C10J3/82—Gas withdrawal means
- C10J3/84—Gas withdrawal means with means for removing dust or tar from the gas
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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
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/10—Biofuels, e.g. bio-diesel
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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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- 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
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
Abstract
The invention discloses a system and a method for preparing activated carbon by integrating carbonization and activation of coal/biomass, wherein the system comprises: the fluidized bed reaction furnace, the gas-solid separation device, the gas furnace and the waste heat recovery device are connected in sequence; the hearth of the fluidized bed reaction furnace is divided into an upper activation zone and a lower carbonization zone, the activation zone is provided with a multi-stage steam pipe and a first fuel air pipe, and the carbonization zone is provided with a gasification air pipe; the gas furnace is provided with a second fuel air pipe; a superheater and an economizer are arranged in the waste heat recovery device, and a superheated steam outlet of the superheater is connected with a multi-stage steam pipe; water in the economizer is heated by flue gas to form steam, the steam enters a steam drum for steam-water separation, the separated water flows back to the economizer, and the steam after the steam-water separation enters a superheater and is continuously heated by the flue gas. The invention combines the carbonization stage and the activation stage into a whole, simplifies the preparation process of the coal/biomass activated carbon and provides an effective technical approach for preparing the activated carbon by coal/biomass at low cost.
Description
Technical Field
The invention relates to the technical field of clean utilization of coal/biomass, in particular to a system and a method for preparing activated carbon by integrating carbonization and activation of coal/biomass.
Background
Activated carbon has been widely used in a variety of fields, such as flue gas pollutant adsorption treatment, domestic sewage purification, treatment of industrial wastewater difficult to degrade, soil pollution control, etc., due to its characteristics of large specific surface area, developed pores, strong adsorption capacity, etc.
Most of the existing activated carbon preparation methods are formed by taking coal or biomass as a raw material, crushing, adding an adhesive, extruding and forming, and then performing a series of processes of carbonization, activation, modification and the like, the process flow is complex, reaction equipment is more, the occupied area is larger, and the carbonization process needs to provide heat by burning natural gas or fuel oil, so the energy consumption and the cost are higher, and the industrial application of the activated carbon is restricted.
The coal/biomass carbon has the characteristics of high carbon content, large specific surface area, developed pores, high mechanical strength and the like, and the coal/biomass resources in China are rich and renewable, so that the coal/biomass carbon prepared by using the coal/biomass as the raw material has a wide application prospect.
Currently, coal/biomass charcoal production is usually performed in a carbonization stage and an activation stage separately, generally, lump materials or molded fuels are used as raw materials, and fixed bed or rotary kiln reactors (such as patent technologies with publication numbers of CN108203093A and CN 110819363A) are adopted, so that the process is complicated, the cost is high, and the large-scale production is difficult.
Disclosure of Invention
Aiming at the defects in the field, the invention provides a system for preparing activated carbon by integrating carbonization and activation of coal/biomass.
A system for preparing activated carbon by integrating carbonization and activation of coal/biomass is characterized by comprising: the fluidized bed reaction furnace, the gas-solid separation device, the gas furnace and the waste heat recovery device are connected in sequence;
the hearth of the fluidized bed reaction furnace is divided into an upper activation zone and a lower carbonization zone, the activation zone is provided with a multi-stage steam pipe and a first fuel air pipe, and the carbonization zone is provided with a gasification air pipe;
the gas furnace is provided with a second fuel air pipe;
a superheater and an economizer are arranged in the waste heat recovery device, and a superheated steam outlet of the superheater is connected with a multi-stage steam pipe;
and water in the economizer is heated by flue gas to form steam, the steam enters a steam drum for steam-water separation, the separated water flows back to the economizer, and the steam after the steam-water separation enters a superheater and is continuously heated by the flue gas.
The invention realizes the carbonization and activation of the coal/biomass raw material in one set of system through the structural optimization, thereby greatly simplifying the production process. According to the invention, a proper amount of air is fed into the activation zone through the first fuel air pipe arranged in the activation zone, so that high-temperature gasified gas generated in the carbonization zone is continuously combusted to release heat, the temperature of the activation zone is kept at 750-900 ℃, and the high-efficiency activation of the carbonized particles is ensured.
Preferably, a gasification air preheater and a burnout air preheater are further arranged in the waste heat recovery device;
the air in the gasification air preheater is heated by flue gas and then flows to the activation zone and the carbonization zone through the first fuel air pipe and the gasification air pipe respectively;
and the air in the burnout air preheater is heated by the flue gas and then flows to the gas furnace through the second fuel air pipe.
Preferably, the superheater, the economizer, the gasification air preheater and the burnout air preheater are sequentially arranged in the waste heat recovery device from top to bottom.
The superheater and the economizer exchange heat with high-temperature flue gas generated by combustion of the gas furnace to form superheated steam, and the superheated steam is conveyed to an activation area to react with carbonized particles generated by the carbonization furnace to generate active carbon. The high-temperature air from the gasification air preheater is used as gasification air of a carbonization zone of the fluidized bed and fuel air of an activation zone, and the high-temperature air from the burnout air preheater is used as fuel air of the gas furnace. The higher temperature air is sent into the carbonization zone of the fluidized bed reaction furnace, which is beneficial to drying and carbonization of the coal/biomass fuel as fired and can treat the coal/biomass raw material with the moisture content of about 60 percent.
The economizer is connected with the steam drum. The economizer can effectively utilize the heat of high-temperature flue gas to heat warm water into saturated steam, the saturated steam is subjected to steam-water separation in the steam drum, the separated saturated water is sent into the economizer again for heating, and the saturated steam is sent into the superheater to form superheated steam. The superheated steam provides an activating agent for the activation reaction of the carbonized particles, and the redundant part can be directly used externally.
Preferably, the multistage steam pipes comprise a plurality of groups of steam pipes which are arranged at intervals from bottom to top along the activation zone, and layered steam feeding is carried out, so that superheated steam is fully contacted with the carbonized particles, and the high-efficiency activation of the carbonized particles is realized. More preferably, the steam pipes comprise 2-20 groups.
Preferably, the temperature of the superheated steam is 200-250 ℃.
Preferably, the solid material outlet of the gas-solid separation device is connected with an activated carbon cooler, so that high-temperature activated carbon particles can be cooled.
Preferably, the gas-solid separation device comprises two stages of cyclones in series.
The invention also provides a method for preparing the active carbon by integrating coal/biomass carbonization and activation, and a system for preparing the active carbon by integrating coal/biomass carbonization and activation comprises the following steps:
1) the coal and/or biomass raw material and air conveyed by a gasification air pipe generate partial gasification reaction at the temperature of 750-900 ℃ in a carbonization zone, and generated gasification gas and carbonized particles enter an activation zone;
2) the gasified gas and the air conveyed by the first fuel air pipe are further combusted in the activation zone to release heat, and the temperature of the activation zone is kept at 750-900 ℃; the carbonized particles and superheated steam fed by a multi-stage steam pipe are subjected to activation reaction in an activation zone to generate activated carbon particles;
3) gasified gas and active carbon particles from the fluidized bed reaction furnace are separated in a gas-solid separation device to obtain active carbon particles, the gasified gas enters a gas furnace to be combusted with air conveyed by a second fuel air pipe, and generated flue gas enters a waste heat recovery device to exchange heat.
In the step 1), heat is released through gasification reaction, and an effective temperature environment is provided for carbonization reaction and activation reaction.
In the step 3), the flue gas generated by combustion in the gas furnace has high temperature and can be preheated and recycled.
Preferably, a gasification air preheater and a burnout air preheater are further arranged in the waste heat recovery device;
the air in the gasification air preheater is heated to the temperature of 400-450 ℃ by smoke gas and then flows to the activation zone and the carbonization zone through the first fuel air pipe and the gasification air pipe respectively;
and the air in the burnout air preheater is heated to the temperature of 150-250 ℃ by the flue gas and then flows to the gas furnace through the second fuel air pipe.
Compared with the prior art, the invention has the main advantages that:
(1) the invention integrates two key processes (carbonization and activation) of the preparation of the activated carbon into a set of device, releases heat and gasified gas through partial gasification reaction, provides effective temperature environment and activation atmosphere for carbonization reaction and activation reaction, avoids providing heat source additionally, thereby greatly reducing energy consumption and production cost and improving economic benefit of the coal/biomass activated carbon.
(2) In the prior art, nitrogen is often required to be additionally introduced as protective gas to maintain the low oxygen state in reactors such as a rotary kiln, the concentration of effective components of generated pyrolysis gas is low, the pyrolysis gas cannot be directly used, and special equipment such as an incinerator is required to be arranged to treat the gas. The carbonization process of the invention adopts a partial gasification method, the coal/biomass raw material is excessive, the air is insufficient, the whole process is in an approximately anaerobic state and other inert gases are not required to be added additionally, the obtained fuel gas has higher heat value, and the heat generated by the combustion of the fuel gas can obtain superheated steam with higher quality through a waste heat recovery device. The steam can be used as an activating agent to be supplied to an activation area of the fluidized bed, and the surplus steam can be externally supplied to industrial production, so that the utilization efficiency of coal/biomass resources is improved, and the production cost is greatly reduced.
Drawings
FIG. 1 is a schematic diagram of the system structure and connection relationship for integrated preparation of activated carbon by carbonization and activation of coal/biomass in example 1;
in the figure: 1. a fluidized bed reactor; 2. a carbonization zone; 3. a transition section; 4. an activation zone; 5. a primary cyclone separator; 6. a secondary cyclone separator; 7. an activated carbon cooler; 8. a gas furnace; 9. a waste heat recovery device; 10. a superheater; 11. a coal economizer; 12. a gasification air preheater; 13. a burnout air preheater; 14. a steam drum; 15. a multi-stage steam pipe; 16. a first fuel air duct; 17. a gasification pipe; 18. a second fuel plenum.
Detailed Description
The invention is further described with reference to the following drawings and specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. The following examples are conducted under conditions not specified, usually according to conventional conditions, or according to conditions recommended by the manufacturer.
Example 1
As shown in fig. 1, the system for preparing activated carbon by coal/biomass carbonization and activation integration comprises:
the device comprises a fluidized bed reaction furnace 1, gas-solid separation devices 5 and 6, an active carbon cooler 7, a gas furnace 8, a waste heat recovery device 9 and a steam drum 14.
The hearth of the fluidized bed reaction furnace 1 is divided into an upper activation zone 4, a lower carbonization zone 2 and a middle transition zone 3, the activation zone 4 is provided with a multi-stage steam pipe 15 and a first fuel air pipe 16, and the carbonization zone 2 is provided with a gasification air pipe 17.
The multistage steam pipes 15 comprise a plurality of groups of steam pipes which are arranged at intervals along the flowing direction (from bottom to top) of the internal combustion gas in the activation zone 4, the number of the steam pipes of the multistage steam pipes 15 can be arranged according to the actual size of the activation zone 4, and for example, the multistage steam pipes 15 in the activation zone 4 comprise 5-10 groups of steam pipes.
The gas-solid separation device comprises a primary cyclone separator 5 and a secondary cyclone separator 6 which are connected in series. The outlet of the activation zone 4 is connected with the inlet of the first-stage cyclone separator 5, and the air outlet of the first-stage cyclone separator 5 is connected with the air inlet of the second-stage cyclone separator 6, so that the gas-solid mixed gas of the high-temperature fuel gas and the activated carbon particles is continuously subjected to twice gas-solid separation. The lower ends of the discharge openings of the two-stage cyclone separators 5 and 6 are provided with an active carbon cooler 7 which can cool high-temperature active carbon particles.
The gas furnace 8 is provided with a second fuel air duct 18. The air outlet of the secondary cyclone separator 6 is connected with the gas furnace 8, and high-temperature gas (gasified gas) is introduced into the gas furnace 8 and is combusted to generate high-temperature flue gas.
The flue gas discharged from the gas furnace 8 enters a waste heat recovery device 9. The waste heat recovery device 9 is internally provided with a superheater 10, an economizer 11, a gasification air preheater 12 and a burnout air preheater 13 from top to bottom in sequence.
The economizer 11 exchanges heat with high-temperature flue gas, warm water is heated into saturated steam, the saturated steam is subjected to steam-water separation in the steam drum 14, the separated saturated water is sent into the economizer 11 again for heating, the saturated steam is sent into the superheater 10 to further exchange heat with the high-temperature flue gas to form superheated steam, an activating agent is provided for the activation reaction of the carbonized particles in the activation zone 4, and the surplus part can be directly used for external use.
The gasification air preheater 12 is connected with the carbonization zone 2 and the activation zone 4 through a gasification air pipe 17 and a first fuel air pipe 16 respectively, and normal-temperature air is subjected to heat exchange with high-temperature flue gas through the gasification air preheater 12 to form high-temperature air which is used as gasification air of the carbonization zone 2 and fuel air of the activation zone 4. The structure can effectively utilize the heat of the high-temperature flue gas.
The burnout air preheater 13 is connected with the gas furnace 8 by adopting the second fuel air pipe 18, the heat of the high-temperature flue gas can be effectively utilized through the structural arrangement, and the normal-temperature air forms 150-250 ℃ high-temperature air after exchanging heat with the flue gas in the burnout air preheater 13 to be used as the fuel air of the gas furnace 8.
The process flow comprises the following steps:
the outside normal temperature air is heated to 400-450 ℃ by the gasification air preheater 12 and then is used as gasification air to be sent into the carbonization zone 2 of the fluidized bed reaction furnace 1.
Coal and/or biomass is fed into the carbonization zone 2 of the fluidized bed reaction furnace 1, and the biomass can be selected from straw, wood chips, nut shells and the like. The gasification air and the coal/biomass fed into the carbonization zone 2 are subjected to partial gasification reaction at the reaction temperature of 750-900 ℃ to generate high-temperature gasification gas and carbonized particles, and the high-temperature gasification gas carries the superheated steam and CO in the gasification gas conveyed by the carbonized particles through the activation zone 4 and the multistage steam pipe 152The components are subjected to an activation reaction to produce activated carbon particles. A small amount of air is fed into the activation zone 4 through a first fuel air pipe 16 arranged in the activation zone 4, and a small amount of high-temperature gasification gas is combusted to release heat, so that the temperature of the activation zone 4 is kept at 750-900 ℃. The activated carbon particles are separated when passing through the primary cyclone separator 5 and the secondary cyclone separator 6 respectively and then are cooled by the activated carbon cooler 7 to be used as activated carbon products.
The outside normal temperature air is heated to 150-. The high-temperature gasification gas from the secondary cyclone separator 6 enters a gas furnace 8 to be combusted with fuel air to generate high-temperature flue gas.
The external warm water exchanges heat with the high-temperature flue gas in the economizer 11 to form saturated steam, the saturated steam is subjected to steam-water separation in the steam drum 14, the separated saturated water is sent into the economizer 11 again for heating, the saturated steam is sent into the superheater 10 to exchange heat with the high-temperature flue gas to form superheated steam, an activating agent is provided for the activation reaction of the carbonized particles in the activation region 4, and the redundant part can be directly used for external use.
The flue gas discharged from the waste heat recovery device 9 is conveyed to a flue gas treatment system for deep purification treatment.
Application example 1
The system for preparing the activated carbon by integrating carbonization and activation of the coal/biomass in the embodiment 1 is used, the feeding amount of the coal and/or the biomass is 20t/h, partial gasification reaction is carried out on the coal and/or the biomass in a carbonization zone 2 of a fluidized bed reaction furnace 1 and high-temperature gasification air at 400 ℃ from a gasification air preheater 12, the reaction temperature is about 800 ℃, and high-temperature gasification gas, carbonized particles and a small amount of fine ash particles are generated by the reaction. The high-temperature gasification gas carries the carbonized particles, and the superheated steam at 210 ℃ and the CO with the volume content of 13 percent in the gasification gas are conveyed by the multistage steam pipe 15 when the carbonized particles pass through the activation zone 42An activation reaction is carried out to produce activated carbon. A small amount of air is fed into the activation zone 4 through an air pipe 16 arranged in the activation zone 4, and a small amount of high-temperature gasification gas is combusted to release heat, so that the temperature of the activation zone 4 is maintained at about 850 ℃. The activated carbon particles are separated by a primary cyclone separator 5 and a secondary cyclone separator 6 along with high-temperature gasified gas and cooled by an active carbon cooler 7, and the yield of the active carbon particles is 2 t/h. The produced activated carbon particles can be used as an adsorbent for adsorption treatment of smoke pollutants, purification of domestic sewage, treatment of industrial wastewater and the like. The high temperature coal gas from the secondary cyclone separator 6 enters the gas furnace 8 to be burnt with the fuel air from the burnout air preheater 13, and the burning temperature is about 900 ℃. The superheater 10 exchanges heat with the flue gas generated by the gas furnace 8 to generate superheated steam with the temperature of 210 ℃ to provide an activating agent for the activation zone 4, and the surplus part is directly supplied for external use.
Furthermore, it should be understood that various changes and modifications can be made by one skilled in the art after reading the above description of the present invention, and equivalents also fall within the scope of the invention as defined by the appended claims.
Claims (8)
1. A system for preparing activated carbon by integrating carbonization and activation of coal/biomass is characterized by comprising: the fluidized bed reaction furnace, the gas-solid separation device, the gas furnace and the waste heat recovery device are connected in sequence;
the hearth of the fluidized bed reaction furnace is divided into an upper activation zone and a lower carbonization zone, the activation zone is provided with a multi-stage steam pipe and a first fuel air pipe, and the carbonization zone is provided with a gasification air pipe;
the gas furnace is provided with a second fuel air pipe;
a superheater and an economizer are arranged in the waste heat recovery device, and a superheated steam outlet of the superheater is connected with a multi-stage steam pipe;
and water in the economizer is heated by flue gas to form steam, the steam enters a steam drum for steam-water separation, the separated water flows back to the economizer, and the steam after the steam-water separation enters a superheater and is continuously heated by the flue gas.
2. The system of claim 1, wherein a gasification air preheater and a burnout air preheater are further disposed within the waste heat recovery device;
the air in the gasification air preheater is heated by flue gas and then flows to the activation zone and the carbonization zone through the first fuel air pipe and the gasification air pipe respectively;
and the air in the burnout air preheater is heated by the flue gas and then flows to the gas furnace through the second fuel air pipe.
3. The system of claim 2, wherein the superheater, the economizer, the gasification air preheater and the burnout air preheater are sequentially arranged in the waste heat recovery device from top to bottom.
4. The system of claim 1, wherein the plurality of stages of steam tubes comprise a plurality of sets of steam tubes spaced from bottom to top along the activation zone.
5. The system of claim 1, wherein the solid material outlet of the gas-solid separation device is connected to an activated carbon cooler.
6. The system of claim 1 or 5, wherein the gas-solid separation device comprises two stages of cyclones in series.
7. A method for preparing activated carbon by integrating carbonization and activation of coal/biomass is characterized in that the system for preparing activated carbon by integrating carbonization and activation of coal/biomass as claimed in claim 1 comprises the following steps:
1) the coal and/or biomass raw material and air conveyed by a gasification air pipe generate partial gasification reaction at the temperature of 750-900 ℃ in a carbonization zone, and generated gasification gas and carbonized particles enter an activation zone;
2) the gasified gas and the air conveyed by the first fuel air pipe are further combusted in the activation zone to release heat, and the temperature of the activation zone is kept at 750-900 ℃; the carbonized particles and superheated steam fed by a multi-stage steam pipe are subjected to activation reaction in an activation zone to generate activated carbon particles;
3) gasified gas and active carbon particles from the fluidized bed reaction furnace are separated in a gas-solid separation device to obtain active carbon particles, the gasified gas enters a gas furnace to be combusted with air conveyed by a second fuel air pipe, and generated flue gas enters a waste heat recovery device to exchange heat.
8. The method of claim 7, wherein a gasification air preheater and a burnout air preheater are further provided in the waste heat recovery device;
the air in the gasification air preheater is heated to the temperature of 400-450 ℃ by smoke gas and then flows to the activation zone and the carbonization zone through the first fuel air pipe and the gasification air pipe respectively;
and the air in the burnout air preheater is heated to the temperature of 150-250 ℃ by the flue gas and then flows to the gas furnace through the second fuel air pipe.
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| CN115465863A (en) * | 2022-08-30 | 2022-12-13 | 山东祥桓环境科技有限公司 | Integrated furnace, system and method for preparing activated carbon by steam one-step method |
| CN115594179A (en) * | 2022-10-26 | 2023-01-13 | 中国科学院工程热物理研究所（Cn） | Carbonization-activation integrated device and method for preparing activated carbon |
| CN115676820A (en) * | 2021-07-28 | 2023-02-03 | 中国科学院工程热物理研究所 | Preparation method and system of activated carbon |
| CN116812929A (en) * | 2023-06-25 | 2023-09-29 | 中科合肥煤气化技术有限公司 | System and method for preparing activated carbon by biomass fluidized bed carbonization coupling segmented activation |
| WO2023241269A1 (en) * | 2022-06-15 | 2023-12-21 | 清华大学 | Double-medium tfb gasification incinerator and method for implementing waste gasification and incineration |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115676820A (en) * | 2021-07-28 | 2023-02-03 | 中国科学院工程热物理研究所 | Preparation method and system of activated carbon |
| WO2023241269A1 (en) * | 2022-06-15 | 2023-12-21 | 清华大学 | Double-medium tfb gasification incinerator and method for implementing waste gasification and incineration |
| CN115465863A (en) * | 2022-08-30 | 2022-12-13 | 山东祥桓环境科技有限公司 | Integrated furnace, system and method for preparing activated carbon by steam one-step method |
| CN115594179A (en) * | 2022-10-26 | 2023-01-13 | 中国科学院工程热物理研究所（Cn） | Carbonization-activation integrated device and method for preparing activated carbon |
| CN116812929A (en) * | 2023-06-25 | 2023-09-29 | 中科合肥煤气化技术有限公司 | System and method for preparing activated carbon by biomass fluidized bed carbonization coupling segmented activation |
| CN116812929B (en) * | 2023-06-25 | 2023-11-28 | 中科合肥煤气化技术有限公司 | System and method for preparing activated carbon by biomass fluidized bed carbonization coupling segmented activation |
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