CN112226241B - System and method for co-producing coal gas and powdery active coke - Google Patents

System and method for co-producing coal gas and powdery active coke Download PDF

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CN112226241B
CN112226241B CN202011064790.1A CN202011064790A CN112226241B CN 112226241 B CN112226241 B CN 112226241B CN 202011064790 A CN202011064790 A CN 202011064790A CN 112226241 B CN112226241 B CN 112226241B
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furnace
coke
coal gas
gasification
gas
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CN112226241A (en
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马春元
王涛
周滨选
付加鹏
赵媛
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Shandong University
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Shandong University
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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
    • C10B53/04—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form of powdered coal
    • 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
    • C10J3/48—Apparatus; Plants
    • C10J3/485—Entrained flow gasifiers
    • 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
    • C10J3/58—Production of combustible gases containing carbon monoxide from solid carbonaceous fuels combined with pre-distillation of the fuel
    • 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
    • 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
    • C10J3/86—Other features combined with waste-heat boilers
    • 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
    • C10J2300/00—Details of gasification processes
    • C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
    • C10J2300/0913—Carbonaceous raw material
    • C10J2300/093—Coal
    • 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
    • C10J2300/00—Details of gasification processes
    • C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
    • C10J2300/0953—Gasifying agents
    • C10J2300/0956—Air or oxygen enriched air
    • 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
    • C10J2300/00—Details of gasification processes
    • C10J2300/09—Details of the feed, e.g. feeding of spent catalyst, inert gas or halogens
    • C10J2300/0953—Gasifying agents
    • C10J2300/0973—Water
    • C10J2300/0976—Water as steam
    • 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

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Organic Chemistry (AREA)
  • Combustion & Propulsion (AREA)
  • Materials Engineering (AREA)
  • Carbon And Carbon Compounds (AREA)

Abstract

The invention relates to a system and a method for co-producing coal gas and powdered activated coke. The device comprises a gasification activation furnace, a powdered coke separator, a carbonization furnace and a carbonized semicoke separator, wherein the gasification activation furnace is of a U-shaped structure with the bottom communicated, the gasification furnace and the activation furnace are respectively arranged on two sides of the gasification activation furnace, the top of the activation furnace is connected with the powdered coke separator, the top of the powdered coke separator is connected with the carbonization furnace, the carbonization furnace is connected with the carbonized semicoke separator, and the carbonization furnace is connected with the bottom of the activation furnace. Taking pulverized coal air gasification gas as a heat source and a medium, and activating the carbonized semicoke to prepare powdery active coke; meanwhile, the coal powder is carbonized by the waste heat of the activated coal gas to prepare the carbonized carbocoal. The waste heat of the coal gas is fully utilized to rapidly prepare the powdery active coke, and simultaneously, the coal gas with higher calorific value is produced.

Description

System and method for co-producing coal gas and powdery active coke
Technical Field
The invention belongs to the technical field of efficient clean utilization of coal, and particularly relates to a system and a method for co-producing coal gas and powdery active coke.
Background
The information in this background section is only for enhancement of understanding of the general background of the invention and is not necessarily to be construed as an admission or any form of suggestion that this information forms the prior art that is already known to a person of ordinary skill in the art.
Coal is the main force of energy consumption in China, and the efficient, clean and comprehensive utilization of coal is a hot problem concerned at present and in the future. Aiming at the efficient clean utilization of coal, the technology provided by the applicant in 'a process and a device for quickly preparing powdery active coke for desulfurization by using pulverized coal' with the patent application number of 201310176387.1 can fully utilize the advantages of high heat and mass transfer speed and high heating rate of the pulverized coal, and realize the quick preparation of the powdery active coke by the pulverized coal. However, the heat medium used in the technology is high-temperature flue gas, namely the front end of the powdery active coke preparation device needs to be matched with a corresponding combustion device, which inevitably increases energy consumption.
Disclosure of Invention
In view of the problems in the prior art, the present invention is to provide a system and a method for co-producing coal gas and powdered activated coke. High-temperature gasification gas is used as a heat medium to activate carbonized semicoke to prepare powdery active coke, and simultaneously, the activated hot gas is used for pre-carbonizing coal powder, so that volatile components are released and decomposed, the heat of the gas is fully utilized, and simultaneously, the heat value of the gas is improved, finally, a set of complete high-value coal utilization technology is formed, and the method has very important significance for improving the comprehensive utilization effect of the coal.
In order to solve the technical problems, the technical scheme of the invention is as follows:
according to the first aspect, the system for co-producing coal gas and powdered activated coke comprises a gasification activation furnace, a powdered coke separator, a carbonization furnace and a carbonization semi-coke separator, wherein the gasification activation furnace is of a U-shaped structure with the bottom communicated, the two sides of the gasification activation furnace are respectively provided with the gasification furnace and the activation furnace, the top of the activation furnace is connected with the powdered coke separator, the top of the powdered coke separator is connected with the carbonization furnace, the carbonization furnace is connected with the carbonization semi-coke separator, and the carbonization furnace is connected with the bottom of the activation furnace.
Taking pulverized coal air gasification gas as a heat source and a medium, and activating the carbonized semicoke to prepare powdery active coke; meanwhile, the coal powder is carbonized by the waste heat of the activated coal gas to prepare carbonized semicoke (the carbonized semicoke is the raw material in the activation process); in addition, the carbonization process is volatilized and analyzed, and decomposition is carried out, so that the heat value of the activated coal gas can be further improved. In conclusion, the process method has the following remarkable advantages: the waste heat of the coal gas is fully utilized to rapidly prepare the powdery active coke, and simultaneously, the coal gas with higher calorific value is produced.
In a second aspect, a method for co-producing coal gas and powdered activated coke comprises the following specific steps:
gasifying the coal powder to obtain coal gas and residues;
carbonizing the coal powder to obtain carbonized semicoke;
mixing the coal gas and the carbonized semicoke, and activating to obtain the active coke.
One or more technical schemes of the invention have the following beneficial effects:
(1) the activation furnace adopts a pulverized coal air gasification mode, so that the final gas-phase product has high effective gas content, high heat value and high utilization rate;
(2) the carbonization furnace fully utilizes the heat of the coal gas after the activation furnace to quickly carbonize the coal powder, so that the volatile components of the coal powder are released and decomposed to prepare powdery carbonized carbocoal, and the obtained carbonized carbocoal is directly conveyed to the medium-temperature activation section for activation by the returned coal gas without cooling.
(3) After the volatile components of the coal powder in the carbonization furnace are released and decomposed, the content of combustible components in gas-phase products, particularly the content of micromolecular hydrocarbons, is increased, and the heat value of the coal gas is improved to a certain extent.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description, serve to explain the invention and not to limit the invention.
FIG. 1 is a diagram of a system for co-producing coal gas and powdered activated coke;
FIG. 2 is a diagram of a system for co-producing coal gas and powdered activated coke;
wherein, 1, a powder making device; 2. a first feeding device; 3. a second feeding device; 4. a gasification burner; 5. a gasification furnace; 6. an ash hopper; 7. a slag pool; 8. a slag conveyor; 9. water/steam tempering nozzles; 10. a charring semicoke feeding port; 11. an activation furnace; 12. a fine coke separator; 13. a coke breeze cooler; 14. a fine coke bin; 15. a coke breeze product outlet; 16. a feed nozzle of the carbonization furnace; 17. a carbonization furnace; 18. a first screw feeder; 19. a carbonized semicoke separator; 20. a second screw feeder; 21. an air preheater; 22. a waste heat boiler; 23. a fan; 24. a bag-type dust collector; 25. a low-temperature gas heat exchanger; 26. a coal gas product.
Detailed Description
It is to be understood that the following detailed description is exemplary and is intended to provide further explanation of the invention as claimed. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
According to the first aspect, the system for co-producing coal gas and powdered activated coke comprises a gasification activation furnace, a powdered coke separator, a carbonization furnace and a carbonization semi-coke separator, wherein the gasification activation furnace is of a U-shaped structure with the bottom communicated, the two sides of the gasification activation furnace are respectively provided with the gasification furnace and the activation furnace, the top of the activation furnace is connected with the powdered coke separator, the top of the powdered coke separator is connected with the carbonization furnace, the carbonization furnace is connected with the carbonization semi-coke separator, and the carbonization furnace is connected with the bottom of the activation furnace.
In some embodiments of the present invention, the gasification furnace further comprises a feeding device, wherein the feeding device comprises a first feeding device and a second feeding device, the first feeding device is connected with the top of the gasification furnace, and the second feeding device is connected with the top of the gasification furnace.
In some embodiments of the present invention, a gasification burner is provided at a position where the first feeding device is connected to the top of the gasification furnace.
In some embodiments of the present invention, the feeding device further includes a pulverizing device, and the pulverizing device is connected to the first feeding device and the second feeding device respectively.
In some embodiments of the invention, a sleeve is arranged at the top of the carbonization furnace, the outer cylinder is connected with the coke breeze separator, the inner cylinder is connected with the second feeding device, and an axial cyclone blade is arranged at the inlet of the top of the carbonization furnace.
Preferably, the deflection angle of the axial swirl blades is 55-65 degrees, and the number of the blades is 8-16.
In some embodiments of the invention, a coke breeze cooler is further included, and the coke breeze separator is coupled to the coke breeze cooler.
In some embodiments of the invention, further comprising an air preheater, the char semi-coke separator is coupled to the air preheater.
In some embodiments of the present invention, the gasification burner further comprises a waste heat boiler, the air preheater is connected to the waste heat boiler, the coke breeze cooler is connected to the waste heat boiler, and the waste heat boiler and the air preheater are respectively connected to the gasification burner.
In some embodiments of the invention, the system further comprises a bag-type dust remover and a low-temperature gas heat exchanger which are connected in sequence, and the waste heat boiler is connected with the bag-type dust remover.
In some embodiments of the invention, the bottom of the carbonization furnace is connected with the charging barrel, the carbonization semicoke separator is positioned outside the carbonization furnace, the top of the carbonization semicoke separator is connected with the bottom of the carbonization furnace, the connecting interface is positioned above the charging barrel, the bottom of the carbonization semicoke separator is connected with the activation furnace, and the charging barrel is connected with the activation furnace.
In some embodiments of the invention, the bottom of the carbonization furnace is connected with a blanking barrel, the carbonized semicoke separator is positioned inside the blanking barrel, the blanking barrel is connected with an air preheater, and the blanking barrel is connected with the activation furnace.
In some embodiments of the invention, the bottom of the carbonization furnace is connected with the activation furnace through a material conveying pipeline, the material conveying pipeline is connected with a gas inlet pipeline of the waste heat boiler, and a fan is arranged on the material conveying pipeline.
In some embodiments of the invention, the bottom U-shaped structure of the gasification activation furnace is an ash hopper.
In some embodiments of the invention, a water/steam tempering nozzle is arranged 0.8-1.2m below the position where the U-shaped structure of the gasification activation furnace is connected with the activation furnace.
In some embodiments of the invention, a carbonized semicoke feeding port is arranged 0.8-1.2m above the position where the U-shaped structure is connected with the activation furnace, and the carbonized semicoke feeding port is connected with the carbonization furnace.
In some embodiments of the invention, a slag pool and a slag dragging machine are arranged at the bottom of the ash bucket, and the slag dragging machine is positioned below the slag pool.
In a second aspect, a method for co-producing coal gas and powdered activated coke comprises the following specific steps:
gasifying the coal powder in a gasification furnace to obtain coal gas and residues;
carbonizing the coal powder in a carbonization furnace to obtain carbonized semicoke;
and mixing the coal gas in the activation furnace with the carbonized semicoke for activation to obtain the active coke.
In some embodiments of the invention, the temperature of the gasifying agent for gasifying the coal powder is 300-350 ℃, and the gasifying agent is air and water vapor.
In some embodiments of the invention, the temperature of the gasification gas at the outlet of the gasification furnace is 1350-.
In some embodiments of the invention, the gas obtained after the semi-coke is carbonized enters an air preheater and a waste heat boiler in sequence for heat exchange, is subjected to dust removal through a cloth bag, and then enters a low-temperature gas heat exchanger for heat exchange to obtain a gas product.
In some embodiments of the present invention, after the activated coke is cooled by water in the coke breeze cooler, the water in the coke breeze cooler enters the waste heat boiler for heat exchange.
In some embodiments of the invention, the mixture from the waste heat boiler and the air preheater is fed to a gasification burner.
As shown in fig. 1 or fig. 2, a system for co-producing coal gas and powdered activated coke comprises a gasification activation furnace, a powdered coke separator 12, a carbonization furnace 17 and a carbonized semi-coke separator 19, wherein the gasification activation furnace is of a U-shaped structure with the bottom communicated, a gasification furnace 5 and an activation furnace 11 are respectively arranged on two sides of the gasification activation furnace, the top of the activation furnace 11 is connected with the powdered coke separator 12, the top of the powdered coke separator 12 is connected with the carbonization furnace 17, the carbonization furnace 17 is connected with the carbonized semi-coke separator 19, and the carbonization furnace 17 is connected with the bottom of the activation furnace 11.
The gasification furnace is of a structure of a descending entrained flow bed, and the activation furnace is of a structure of an ascending entrained flow bed.
The gasification activation furnace is divided into two sections through a U-shaped structure at the bottom, so that after the coal powder is gasified at high temperature in the gasification furnace 5, the obtained gasified gas directly enters the activation furnace 11 through the U-shaped structure. And activating the carbonized semicoke by using high-temperature gasification gas to obtain the active coke.
The coal powder enters the carbonization furnace 17, the coal powder is carbonized by utilizing the residual heat of the activated coal gas to contact with the coal powder to obtain carbonized semicoke, and the carbonized semicoke enters the bottom of the activation furnace 11 and contacts with the gasified gas entering the gasification furnace 5 to start activation to obtain active coke.
Therefore, the gasified gas and the carbonized semicoke are used for preparing the active coke, and the coal gas with higher heat value is obtained at the same time.
The feeding device includes a first feeding device 2 and a second feeding device 3, the first feeding device 2 is connected with the top of the gasification furnace 5, and the second feeding device 3 is connected with the top of the carbonization furnace 17.
The first feeding device 2 is used for feeding materials to the gasification furnace 5, obtaining gasified gas, and taking the gasified gas as a heat source and a medium to enter the activation furnace for activation; the second feeding device 3 is used for feeding the carbonization furnace 17 and obtaining carbonized semicoke. In the carbonization process, the volatilization in the coal powder is analyzed and decomposed to enter the coal gas, so that the heat value of the coal gas is improved.
The pulverized coal enters the gasification furnace 5 from the top of the gasification furnace 5, and is gasified under the ignition effect of the gasification burner.
The pulverizing apparatus 1 is used for pulverization and fine grinding of coal, conveyance, and the like. Can comprise a crusher, a coal mill, a circulating fan, a gas-solid separator, a powder conveying pump and the like.
At the interface position with respect to the top of the carbonization furnace 17:
the top of the carbonization furnace 17 is provided with a sleeve, the outer cylinder is connected with the coke breeze separator 12, the inner cylinder is connected with the second feeding device 3, and the inlet at the top of the carbonization furnace 17 is provided with an axial rotational flow blade.
Therefore, coal gas entering from the coke breeze separator 12 enters the carbonization furnace 17 through the outer cylinder, coal powder in the second feeding device 3 enters the carbonization furnace 17 through the inner cylinder, and the axial swirl blades are arranged at the inlet at the top for fully mixing the coal gas and the coal powder and strengthening gas-solid mixing. The deflection angle of the axial swirl blades is 55-65 degrees, and the number of the blades is 8-16.
As for the fine coke cooler 13, the fine coke separator 12 is connected to the fine coke cooler 13. The powdery active coke enters a coke breeze cooler 13 and is cooled, the coke breeze cooler 13 is a water cooling cooler, and cooling medium water is heated. The coke breeze bin is connected with the bottom of the coke breeze cooler 13, and the obtained coke breeze enters the coke breeze bin 14 for storage or is discharged through a coke breeze product outlet at the bottom.
Regarding the air preheater 21, the char and semicoke separator 19 is connected to the air preheater, and the fine coke separator is connected to the air preheater. After the coal gas and the carbonized coke breeze are separated in the carbonized carbocoal separator 19, the coal gas enters the air preheater 21, and the air is heated in the air preheater 21. The water heated by the coke breeze cooler 13 enters the air preheater 21 to exchange heat with the coal gas to be further heated.
Regarding the waste heat boiler 22, the air preheater 21 is connected to the waste heat boiler 22, the coke breeze cooler 13 is connected to the waste heat boiler 22, and the waste heat boiler 22 and the air preheater 21 are connected to the gasification burner 4, respectively. The gas after heat exchange in the air preheater 21 enters the exhaust-heat boiler 22, and then sufficient heat exchange is performed.
The water heated in the air preheater 21 enters the waste heat boiler 22, after heat exchange with the coal gas, a part of the water enters the gasification burner 4, and the air heated by the air preheater 21 enters the gasification burner 4 to gasify the coal powder.
The waste heat boiler also comprises a bag-type dust remover 24 and a low-temperature gas heat exchanger 25 which are connected in sequence, and the waste heat boiler 22 is connected with the bag-type dust remover 24.
The coal gas is dedusted by the bag-type dust remover 24 and then enters the low-temperature coal gas heat exchanger 25 for heat exchange to obtain a coal gas product.
The gas is subjected to a subsequent heat exchange process to heat the air and moisture of the gasification burner 4, and heat exchange is carried out in the waste heat boiler 22 and also in the subsequent low-temperature gas heat exchanger 25 to obtain a final gas product 26.
Regarding the structure in which the bottom of the carbonization furnace 17 is connected to the activation furnace 11: the bottom of the carbonization furnace 17 is connected with a blanking barrel, so that the carbonized carbocoal enters the blanking barrel and is then conveyed to the activation furnace 11 through a conveying pipeline, the bottom of the blanking barrel can be provided with a first screw feeder 18, and the first screw feeder 18 is connected with the conveying pipeline.
The carbonized carbocoal separator 19 can be divided into two types, one type is arranged outside the carbonization furnace, the top of the carbonized carbocoal separator 19 is connected with the bottom of the carbonization furnace, the connected interface is positioned above the charging chute, and the bottom of the carbonized carbocoal separator is connected with the material conveying pipeline through a second screw feeder 20. As shown in fig. 1.
In another case, the carbonized carbocoal separator 19 is positioned inside the blanking barrel and is a cyclone gas-solid separator, the blanking barrel is connected with the air preheater 21 through a pipeline, one end of the pipeline extends into the blanking barrel, and the other end is connected with the air preheater 21. As shown in fig. 2.
Regarding the conveying pipeline, a fan 23 (circulating fan) is arranged on the conveying pipeline, the conveying pipeline is connected with an inlet pipe of the waste heat boiler, the inlet pipe of the waste heat boiler 22 is a connecting pipeline of the air preheater 21 and the waste heat boiler 22, and coal gas is introduced into the conveying pipeline and is used for conveying the carbonized carbocoal. The material conveying pipeline is connected with the side wall of the activation furnace, and four corners of the carbonized carbocoal enter the activation furnace in a tangential mode.
The U-shaped structure at the bottom of the gasification activation furnace is an ash bucket 6. The bottom of the ash bucket 6 is provided with a slag pool 7 and a slag dragging machine 8, and the slag dragging machine 8 is positioned below the slag pool 7. Ash and slag generated in the activation process of coal powder gasification and carbonized semicoke enter the ash bucket 6, then flow into the slag pool 7 from the ash bucket 6, and are fished out by the slag dragging machine 8 after being chilled by water.
A water/steam tempering nozzle 9 is arranged at a position 0.8-1.2m below the position where the U-shaped structure of the gasification activation furnace is connected with the activation furnace 11; a carbonized semicoke feeding port is arranged at the position 0.8-1.2m above the position where the U-shaped structure is connected with the activation furnace 11, and the carbonized semicoke feeding port 10 is connected with the carbonization furnace 17.
The water/steam tempering nozzle 9 is used for introducing water/steam for cooling the gasified gas and adjusting the concentration of the steam in the gasified gas.
Example 1
The coal powder (the water content is less than 15%, the heat value is 5000kcal, and the average grain diameter is 200 meshes) is gasified in a gasification furnace, the gasification agent is air and water vapor, the temperature of the gasification agent is 300-350 ℃, and the gasification time is 3-7 s. The temperature of the generated gasification gas is 1350-;
before entering the activation furnace, the gasified gas is quenched and tempered by water/steam, the temperature is reduced to 1100 ℃ and 1200 ℃, and the steam content is 20-40%;
mixing gasified gas and carbonized semicoke, ascending, activating for 3-10s, and controlling the temperature of activated gas to be 800-1000 ℃;
cooling the fine coke to 80 ℃, and then feeding water (80 ℃) in a fine coke cooler into a waste heat boiler;
the coal gas enters a carbonization furnace to be carbonized with the coal powder, the temperature of the coal gas at the inlet of the carbonization furnace is 800-1000 ℃, the carbonization time is 3-5s, and the temperature of the obtained coal gas is 500-600 ℃;
the coal gas obtained after carbonization enters an air preheater to heat air, then enters a waste heat boiler and a bag-type dust remover to remove dust, and then enters a low-temperature coal gas heat exchanger to exchange heat to obtain a coal gas product (40-60 ℃), and the final coal gas heat value is 1500kcal/Nm3。
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (23)

1. A system for coproducing coal gas and powdery active coke is characterized in that: the device comprises a gasification activation furnace, a powdered coke separator, a carbonization furnace and a carbonized semicoke separator, wherein the gasification activation furnace is of a U-shaped structure with the bottom communicated, the gasification furnace and the activation furnace are respectively arranged on two sides of the gasification activation furnace, the top of the activation furnace is connected with the powdered coke separator, the top of the powdered coke separator is connected with the carbonization furnace, the carbonization furnace is connected with the carbonized semicoke separator, and the carbonization furnace is connected with the bottom of the activation furnace.
2. The system for co-producing coal gas and powdered activated coke as claimed in claim 1, wherein: the gasification furnace is characterized by further comprising a feeding device, wherein the feeding device comprises a first feeding device and a second feeding device, the first feeding device is connected with the top of the gasification furnace, and the second feeding device is connected with the top of the carbonization furnace.
3. The system for co-producing coal gas and powdered activated coke as claimed in claim 2, wherein: and a gasification burner is arranged at the position where the first feeding device is connected with the top of the gasification furnace.
4. The system for co-producing coal gas and powdered activated coke as claimed in claim 2, wherein: the feeding device further comprises a powder making device, and the powder making device is connected with the first feeding device and the second feeding device respectively.
5. The system for co-producing coal gas and powdered activated coke as claimed in claim 1, wherein: the top of the carbonization furnace is provided with a sleeve, the outer cylinder is connected with the coke breeze separator, the inner cylinder is connected with the second feeding device, and an axial cyclone blade is arranged at the inlet of the top of the carbonization furnace.
6. The system for co-producing coal gas and powdered activated coke as claimed in claim 5, wherein: the deflection angle of the axial swirl blades is 55-65 degrees, and the number of the blades is 8-16.
7. The system for co-producing coal gas and powdered activated coke as claimed in claim 1, wherein: the coke breeze separator is connected with the coke breeze cooler.
8. The system for co-producing coal gas and powdered activated coke as claimed in claim 1, wherein: still include air heater, the semicoke separator of carbomorphism is connected with air heater.
9. The system for co-producing coal gas and powdered activated coke of claim 8, wherein: still include exhaust-heat boiler, air heater is connected with exhaust-heat boiler, and the fine coke cooler is connected with exhaust-heat boiler, and exhaust-heat boiler, air heater are connected with the gasification nozzle respectively.
10. The system for co-producing coal gas and powdered activated coke of claim 9, wherein: the waste heat boiler is connected with the bag-type dust remover.
11. The system for co-producing coal gas and powdered activated coke as claimed in claim 1, wherein: the bottom of retort is connected the blanking section of thick bamboo, and the semicoke separator of carbomorphism is located the outside of retort, and the top of semicoke separator of carbomorphism is connected with the bottom of retort, and the interface of connection is located the top of blanking section of thick bamboo, and the bottom of semicoke separator of carbomorphism is connected with the activation furnace, and the blanking section of thick bamboo is connected with the activation furnace.
12. The system for co-producing coal gas and powdered activated coke as claimed in claim 1, wherein: the bottom of the carbonization furnace is connected with a blanking barrel, the carbonized semicoke separator is positioned in the blanking barrel, the blanking barrel is connected with an air preheater, and the blanking barrel is connected with the activation furnace.
13. The system for co-producing coal gas and powdered activated coke as claimed in claim 1, wherein: the bottom of the carbonization furnace is connected with the activation furnace through a material conveying pipeline, the material conveying pipeline is connected with a gas inlet pipeline of the waste heat boiler, and a fan is arranged on the material conveying pipeline.
14. The system for co-producing coal gas and powdered activated coke as claimed in claim 1, wherein: the U-shaped structure at the bottom of the gasification activation furnace is an ash bucket.
15. The system for co-producing coal gas and powdered activated coke of claim 14, wherein: and a water/steam tempering nozzle is arranged 0.8-1.2m below the position where the U-shaped structure of the gasification activation furnace is connected with the activation furnace.
16. The system for co-producing coal gas and powdered activated coke of claim 15, wherein: and a carbonized semicoke feeding port is arranged at a position 0.8-1.2m above the position where the U-shaped structure is connected with the activation furnace, and the carbonized semicoke feeding port is connected with the carbonization furnace.
17. The system for co-producing coal gas and powdered activated coke of claim 14, wherein: the bottom of the ash bucket is provided with a slag pool and a slag conveyor, and the slag conveyor is positioned below the slag pool.
18. The method for co-producing gas and powdered activated coke by using the system for co-producing gas and powdered activated coke according to any one of claims 1 to 17, characterized in that: the method comprises the following specific steps:
gasifying the coal powder in a gasification furnace to obtain coal gas and residues;
carbonizing the coal powder in a carbonization furnace to obtain carbonized semicoke;
and mixing the coal gas in the activation furnace with the carbonized semicoke for activation to obtain the active coke.
19. The method for co-producing coal gas and powdered activated coke as claimed in claim 18, wherein: the temperature of a gasifying agent for gasifying the coal powder is 300-350 ℃, and the gasifying agent is air and water vapor.
20. The method for co-producing coal gas and powdered activated coke as claimed in claim 18, wherein: the temperature of the gasified gas at the outlet of the gasification furnace is 1350-.
21. The method for co-producing coal gas and powdered activated coke as claimed in claim 18, wherein: and (3) sequentially feeding the gas obtained after the semi-coke carbonization into an air preheater and a waste heat boiler for heat exchange, removing dust through cloth bag dust removal, and then feeding the gas into a low-temperature gas heat exchanger for heat exchange to obtain a gas product.
22. The method for co-producing coal gas and powdered activated coke as claimed in claim 18, wherein: after the active coke is cooled by water in the coke breeze cooler, the water in the coke breeze cooler enters the waste heat boiler for heat exchange.
23. The method for co-producing coal gas and powdered activated coke as claimed in claim 18, wherein: and the mixed gas obtained by the waste heat boiler and the air preheater enters a gasification burner.
CN202011064790.1A 2020-09-30 2020-09-30 System and method for co-producing coal gas and powdery active coke Active CN112226241B (en)

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JPH11349317A (en) * 1998-06-08 1999-12-21 Nippon Steel Corp Production of active coke having high strength and high adsorptivity
KR101896122B1 (en) * 2012-12-11 2018-09-07 에스케이이노베이션 주식회사 Process and System for Gasification Using Dryer Integrated with Water-Gas Shift Catalyst
CN106190317B (en) * 2016-07-22 2020-10-27 新奥科技发展有限公司 Coal gasification furnace, coal gasification system and preparation method of active coke
CN108910874A (en) * 2018-07-19 2018-11-30 山东大学 A kind of technique and system of lignite preparation high yield high activity powdered activated coke
CN110358578A (en) * 2019-06-28 2019-10-22 华中科技大学 A kind of fire coal coupled biological matter power generating simultaneously charcoal system
CN210915935U (en) * 2019-11-18 2020-07-03 新奥科技发展有限公司 Integrative stove and system of fine coal pyrolysis and semicoke activation

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