CN113234484B - Coal gasification production system - Google Patents
Coal gasification production system Download PDFInfo
- Publication number
- CN113234484B CN113234484B CN202110557738.8A CN202110557738A CN113234484B CN 113234484 B CN113234484 B CN 113234484B CN 202110557738 A CN202110557738 A CN 202110557738A CN 113234484 B CN113234484 B CN 113234484B
- Authority
- CN
- China
- Prior art keywords
- tungsten
- coal
- gasification
- outlet
- tube
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- 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
-
- 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
- C10J3/22—Arrangements or dispositions of valves or flues
-
- 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
- C10J3/30—Fuel charging devices
-
- 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
- C10J3/723—Controlling or regulating the gasification process
-
- 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
- C10J3/74—Construction of shells or jackets
-
- 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
- C10J2200/00—Details of gasification apparatus
- C10J2200/15—Details of feeding means
- C10J2200/152—Nozzles or lances for introducing gas, liquids or suspensions
-
- 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
- C10J2300/0959—Oxygen
-
- 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
- C10J2300/0969—Carbon dioxide
-
- 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
- C10J2300/12—Heating the gasifier
- C10J2300/1207—Heating the gasifier using pyrolysis gas as 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
- C10J2300/00—Details of gasification processes
- C10J2300/12—Heating the gasifier
- C10J2300/1223—Heating the gasifier by burners
-
- 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
- C10J2300/16—Integration of gasification processes with another plant or parts within the plant
- C10J2300/164—Integration of gasification processes with another plant or parts within the plant with conversion of synthesis gas
- C10J2300/1643—Conversion of synthesis gas to energy
- C10J2300/1653—Conversion of synthesis gas to energy integrated in a gasification combined cycle [IGCC]
-
- 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
- C10J2300/18—Details of the gasification process, e.g. loops, autothermal operation
- C10J2300/1807—Recycle loops, e.g. gas, solids, heating medium, water
-
- 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
- Y02E20/16—Combined cycle power plant [CCPP], or combined cycle gas turbine [CCGT]
- Y02E20/18—Integrated gasification combined cycle [IGCC], e.g. combined with carbon capture and storage [CCS]
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Industrial Gases (AREA)
Abstract
The application belongs to the technical field of chemical production, especially, relate to a coal gasification production system, include: a vertical fixed gasification furnace, a pulverized coal bin, a pulverized coal distributor and a regenerative furnace; the coal powder bin is connected to a tungsten tube of the vertical fixed gasification furnace through a coal powder distributor, the upper part of the tungsten tube is communicated with the gas chamber, and an outlet of the gas chamber is connected with a product outlet; the flue gas outlet of the vertical fixed gasification furnace is connected with a pulverized coal distributor through a regenerative furnace and is used as conveying gas and gasification agent of pulverized coal. According to the coal gasification production system provided by the embodiment of the application, carbon dioxide formed after the self-produced coal gas is used for heating the tungsten tube is used as a gasification agent for coal gasification, so that the recycling of the carbon dioxide is realized.
Description
Technical Field
The application belongs to the technical field of chemical production, and particularly relates to a coal gasification production system.
Background
Coal gasification is an indispensable part in basic industries such as chemical industry and metallurgy. Coal gasification is a thermochemical process in which coal or coal char is used as a raw material, oxygen (air, oxygen-rich or pure oxygen), steam or hydrogen is used as a gasifying agent, and combustible parts in the coal or coal char are converted into gas fuel or downstream raw materials through chemical reactions at a high temperature. The common coal gasification technology has the problems of higher production cost, more pollution discharge and the like.
Disclosure of Invention
In view of this, the embodiment of the present application provides a coal gasification production system, so as to solve the problems of high production cost and more pollution discharge in the existing coal gasification production.
The embodiment of the application provides a coal gasification production system, includes: the system comprises a vertical fixed gasification furnace, a pulverized coal bin, an oxygen heat exchanger, a slag cooler, a pulverized coal distributor, a CO heat exchanger, a first dust remover, a first induced draft fan, a regenerative furnace, a second dust remover, a second induced draft fan, a liquid oxygen station and a third induced draft fan. The vertical fixed gasification furnace is provided with a combustion chamber, a gas chamber, a hearth and a slag collecting chamber, wherein the hearth is provided with a tungsten pipe and a flue gas outlet. The combustion chamber is provided with a gas burner. The slag collection chamber is provided with a slag outlet which is connected to a slag cooler. The coal powder bin is connected to the tungsten tube through a coal powder distributor. The upper part of the tungsten tube is communicated with the gas chamber, and the lower part of the tungsten tube is connected with the slag collection chamber. And an outlet of the gas chamber is sequentially connected with the first dust remover and the first induced draft fan through a tube pass of the CO heat exchanger. The outlet of the first induced draft fan is divided into two paths, one path is directly connected with the product outlet of the coal gasification production system, and the other path is connected with the heat release inlet of the regenerative furnace. The flue gas outlet is connected with a heat absorption inlet of the regenerative furnace, a heat absorption outlet of the regenerative furnace is divided into three paths after passing through a second dust remover and a second induced draft fan, and the first path is connected with a tube pass inlet of the CO heat exchanger. The second path is connected with a coal powder distributor and is used as conveying gas and gasifying agent of coal powder. The third path is connected with a heat release inlet of the regenerative furnace. The heat release outlet of the regenerative furnace is connected with the gas burner. The oxygen outlet of the liquid oxygen station is also connected with the gas burner through the shell side of the oxygen heat exchanger. And a tube pass outlet of the oxygen heat exchanger is connected with a shell pass of the CO heat exchanger through a third induced draft fan, and a shell pass outlet of the CO heat exchanger is connected with a tube pass inlet of the oxygen heat exchanger.
The regenerative furnace is provided with two regenerative furnaces, and the heating process and the cooling process can be alternately carried out to ensure the continuous operation of the system. Each dust remover in the coal gasification production system has the function of removing substances such as steam, hydrogen, sulfide and the like on the basis of the dust removing function, thereby protecting the tungsten tube and prolonging the service life of the tungsten tube.
Specifically, a hearth of the vertical fixed gasification furnace is divided into a low-temperature gasification section, a medium-temperature gasification section and a high-temperature gasification section from top to bottom. The channels of the low-temperature gasification section, the medium-temperature gasification section and the high-temperature gasification section are connected in a back-turning way. The combustion chamber is arranged at the inlet of the high-temperature gasification section. The outlet of the low-temperature gasification section is a flue gas outlet.
Specifically, a middle pipe is arranged in the tungsten pipe and is connected with the pulverized coal distributor.
Specifically, the preparation method of the tungsten tube comprises the following steps: the graphite layer is printed with metal tungsten on two sides, or prepared from pure metal tungsten. The diameter of the tungsten tube includes, but is not limited to, 80-150mm, and the length of the tube includes, but is not limited to, 300-800 mm.
Specifically, in the vertical fixed gasification furnace, the lower part of the tungsten tube is a molten pool, the height of the molten pool is the height including but not limited to the height 1/3 of the tungsten tube, and the molten pool is formed by melting gasified ash. The upper portion of the tungsten tube is a layer of solid feedstock that is at a height that includes, but is not limited to, tungsten tube height 2/3. Allowing the entire filling of the tungsten tube with the layer of solid feedstock or the entire filling of the tungsten tube with the molten bath.
Specifically, fluxing agents such as potassium oxide, sodium oxide, calcium oxide and the like are added into the raw materials to reduce the ash melting point of ash.
In particular, the vertical fixed gasification furnace is allowed to be replaced by any other equipment capable of realizing molten pool heating for coal gasification. The feeding mode of the coal gasification production system is multi-frequency and low-feeding. The coal entering the coal gasification production system needs to be dried and dehydrated in advance. The coal can be dried and dehydrated by utilizing various residual heat of the coal gasification production system according to the requirement. The tungsten tube may be replaced with materials including, but not limited to, tungsten iron, other high temperature metallic materials, or alloys. High temperature materials including but not limited to graphitized carbon as a substrate, and high temperature metal materials or alloys such as tungsten, rhenium, etc. can be plated or sprayed on the surface layer of the graphitized carbon or 3D printed. The tungsten tube may be replaced with a material other than tungsten. Materials of different materials can be used and a proper process is adopted to combine the materials into a whole in a layered mode to replace a tungsten tube, so that the service life, the heat conductivity and other characteristics of the combined material are better.
According to the coal gasification production system provided by the embodiment of the application, the tungsten pipe is heated by utilizing the self-produced coal gas, so that the raw materials in the tungsten pipe form a molten pool, and coal gasification is carried out in a mode of heating the molten pool. The heat utilization rate of molten pool heating is higher, and when raw material powder is added into the molten pool in the tungsten tube, a small amount of material can be fed frequently, so that the coal gasification efficiency is improved. The coal gasification production system provided by the embodiment of the application utilizes CO formed after self-produced coal gas is used for heating a tungsten tube2As a gasifying agent for coal gasification, CO is realized2The recycling of (2). In addition, the coal gasification production system provided by the embodiment of the application heats CO formed after the self-produced coal gas heats the tungsten tube2Adding into product to make CO2Become a part of the product and realize CO2Zero emission of (2).
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
FIG. 1 is a schematic structural diagram of a coal gasification production system provided in an embodiment of the present application;
FIG. 2 is a schematic structural view of a vertical fixed gasifier;
the system comprises a 1-CO heat exchanger, a 3-first dust remover, a 4-first induced draft fan, a 5-pulverized coal bin, a 6-second dust remover, a 7-second induced draft fan, a 8-slag outlet, a 9-liquid oxygen station, a 10-third induced draft fan, a 11-gas burner, a 12-regenerator, a 13-combustion chamber, a 25-flue gas outlet, a 27-oxygen heat exchanger, a 30-tungsten pipe, a 66-vertical fixed gasification furnace, a 67-gas chamber, a 68-slag collecting chamber, a 76-middle pipe, a 77-low temperature gasification section, a 78-medium temperature gasification section, a 79-high temperature gasification section, a 80-pulverized coal distributor and a 81-slag cooler.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the present application. It will be apparent, however, to one skilled in the art that the present application may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary detail.
In order to explain the technical solution described in the present application, the following description will be given by way of specific examples.
An embodiment of the present application provides a coal gasification production system, as shown in fig. 1, including: the system comprises a vertical fixed gasification furnace 66, a pulverized coal bunker 5, an oxygen heat exchanger 27, a slag cooler 81, a pulverized coal distributor 80, a CO heat exchanger 1, a first dust remover 3, a first induced draft fan 4, a regenerative furnace 12, a second dust remover 6, a second induced draft fan 7, a liquid oxygen station 9 and a third induced draft fan 10.
The vertical fixed gasification furnace 66 is provided with a combustion chamber 13, a gas chamber 67, a hearth and a slag collection chamber 68, and the hearth is provided with a tungsten pipe 30 and a flue gas outlet 25. The combustion chamber 13 is provided with a gas burner 11. The slag collection chamber 68 is provided with a slag outlet 8, the slag outlet 8 being connected to a slag cooler 81. The coal dust bin 5 is connected to the tungsten tube 30 through a coal dust distributor 80. The upper part of the tungsten tube 30 is connected to a gas chamber 67, and the lower part thereof is connected to a slag collection chamber 68.
An outlet of the gas chamber 67 is sequentially connected with the first dust remover 3 and the first induced draft fan 4 through a tube pass of the CO heat exchanger 1. The outlet of the first induced draft fan 4 is divided into two paths, one path is directly connected with the product outlet of the coal gasification production system, and the other path is connected with the heat release inlet of the regenerative furnace 12.
The flue gas outlet 25 is connected with the heat absorption inlet of the regenerative furnace 12, and the heat absorption outlet of the regenerative furnace 12 is divided into three paths after passing through the second dust remover 6 and the second induced draft fan 7: the first path is connected with a tube pass inlet of the CO heat exchanger 1; the second path is connected with a pulverized coal distributor 80 and is used as conveying gas and gasifying agent of pulverized coal; the third path is connected with the heat release inlet of the regenerative furnace 12.
The heat release outlet of the regenerative furnace 12 is connected with the gas burner 11. The oxygen outlet of the liquid oxygen station 9 is also connected with the gas burner 11 through the shell side of the oxygen heat exchanger 27. The tube pass outlet of the oxygen heat exchanger 27 is connected with the shell pass of the CO heat exchanger 1 through a third induced draft fan 10, and the shell pass outlet of the CO heat exchanger 1 is connected with the tube pass inlet of the oxygen heat exchanger 27.
Specifically, as shown in fig. 2, the furnace chamber of the vertical fixed gasification furnace 66 is divided into a low-temperature gasification stage 77, a medium-temperature gasification stage 78, and a high-temperature gasification stage 79 from top to bottom. The channels of the low-temperature gasification section 77, the medium-temperature gasification section 78 and the high-temperature gasification section 79 are connected back and forth. The combustion chamber 13 is arranged at the inlet of the high-temperature gasification section 79; the outlet of the low-temperature gasification section 77 is the flue gas outlet 25.
In the vertical fixed gasification furnace 66 shown in fig. 2, a middle pipe 76 is provided in the tungsten pipe 30, and the middle pipe 76 is connected to a pulverized coal distributor 80 for injecting pulverized coal into the upper surface of the molten pool of the tungsten pipe 30, or injecting pulverized coal into the molten pool of the tungsten pipe 30, or simultaneously transporting pulverized coal to the upper surface of the molten pool of the tungsten pipe 30 and the molten pool.
In one embodiment, the method for manufacturing the tungsten tube 30 comprises: and metal tungsten is printed on two sides of the graphite layer. Or prepared by pure metal tungsten. The diameter of tungsten tube 30 includes, but is not limited to, 80-150mm, and the tube length is 300-800 mm.
In the vertical fixed gasification furnace 66, the lower part of the tungsten pipe 30 is a molten pool, the height of the molten pool is the height including but not limited to the height 1/3 of the tungsten pipe, and the molten pool is formed by melting gasification ash; the upper portion of tungsten tube 30 is a solid feedstock layer that is at a height that includes, but is not limited to, tungsten tube height 2/3. Allowing the tungsten tube 30 to be filled entirely with a layer of solid feedstock material or the tungsten tube 30 to be filled entirely with a molten bath.
In practical application, fluxing agents such as potassium oxide, sodium oxide, calcium oxide and the like are allowed to be added into the raw materials so as to reduce the ash melting point of ash.
The feeding mode of the coal gasification production system is multi-frequency and low-feeding. The coal entering the coal gasification production system needs to be dried and dehydrated in advance. The coal can be dried and dehydrated by utilizing various residual heat of the coal gasification production system according to the requirement.
The vertical fixed gasification furnace 66 is replaced by any other equipment capable of realizing molten pool heating for coal gasification, so that coal gasification is realized.
The working process of the coal gasification production system provided by the embodiment of the application is as follows: the low-temperature oxygen from the liquid oxygen station is heated to 200 ℃ by the oxygen heat exchanger 27 and then is mixed with the 500 ℃ CO + CO from the regenerative furnace 122The mixed gas (the CO content is 35 percent) enters the gas burner 11 of the vertical fixed gasification furnace 66 together for combustion, and high-temperature flue gas at 1800 ℃ is generated by combustion. The high-temperature flue gas passes through a high-temperature gasification section 79, a medium-temperature gasification section 78 and a low-temperature gasification section 77 of the vertical fixed gasification furnace 66 in sequence, and the partition wall heats the tungsten tube 30 and the materials (mainly raw material coal and raw material CO) in the tungsten tube2Gas) ofThe gasification reaction within the tungsten tube provides heat. The high-temperature flue gas firstly passes through the high-temperature gasification section 79 and then the temperature is reduced to 1400 ℃; then the temperature is reduced to 1000 ℃ after passing through a medium-temperature gasification section; finally, the temperature is finally reduced to 800 ℃ through a low-temperature gasification section. Flue gas (CO as main component) at 800 deg.C2) Is discharged from the vertical fixed gasification furnace 66 to enter the regenerative furnace 12 to provide heat for the regenerative furnace 12. The regenerator 12 is provided with two regenerators which can alternately perform a heating process and a cooling process to ensure continuous operation of the system. The temperature of the flue gas discharged from the regenerative furnace is reduced to 100 ℃. The flue gas with the temperature of 100 ℃ is divided into three parts after being dedusted by a second deduster 6 and the pressure of the flue gas is increased by a second induced draft fan 7. Wherein a part of the raw material is CO2The raw material coal powder in the coal powder bin 5 is quantitatively added into each tungsten tube 30 of the vertical fixed gasification furnace 66 by gas conveying through a coal powder distributor 80 and an intermediate tube 76, and the specific feeding position is positioned below a gasification ash slag molten pool formed at the lower part of the tungsten tube 30. Coal dust and CO2The gas is heated and heated in each tungsten tube 30, and gasification reaction is carried out to generate 90% content CO gas, and the 90% content CO gas is discharged from an upper outlet of the tungsten tube 30 to a gas chamber 67 at the upper part of the vertical fixed gasification furnace 66; the gasification ash residue left after the coal powder gasification is melted at high temperature and forms a gasification ash residue molten pool in the tungsten pipe 30, and the height of the molten pool of the gasification ash residue is 1/3 of the height of the tungsten pipe. The slag in the gasified slag melting bath can be discharged in a slag tapping manner through a slag collecting chamber 68 at the bottom of the vertical fixed gasification furnace 66. 90% CO gas from the gas chamber 67 at 800 deg.C; it is mixed with another part of 100 deg.C fume, and the temp. is reduced to 600 deg.C, and at the same time the concentration of CO is reduced to 80% content so as to ensure the safety of subsequent working procedure. The 80% CO gas with the temperature of 600 ℃ exchanges heat with the circulating nitrogen through the CO heat exchanger 1, and when the temperature of the gas is reduced to 100 ℃, the circulating nitrogen with the temperature of 15 ℃ from the oxygen heat exchanger 27 is heated to 500 ℃. The 500 ℃ recycle nitrogen is returned to the oxygen heat exchanger 27 to heat the oxygen. After the 100 ℃ CO gas with the content of 80 percent is subjected to dust removal and purification by a first dust remover 3 and pressurization by a first induced draft fan 4, one part of the CO gas is used as a product for external supply; another portion is mixed with the third portion of flue gas. CO + CO at 100 ℃ after mixing2The mixed gas (CO content is 35 percent) passes through the storageThe hot furnace 12 is heated to 500 ℃, and then enters the gas burner 11 of the vertical fixed gasification furnace 66 to be used as gas.
Each dust remover in the coal gasification production system has a function of removing substances such as steam, hydrogen, sulfides, and the like in addition to a dust removal function, thereby protecting the tungsten tube 30 and prolonging the service life of the tungsten tube 30. In order to prevent the direct flame injection from damaging the tungsten tube or shortening the service life, a protective array facing the gas burner 11 may be provided in the combustion chamber 13. The protective array can be made of high-temperature-resistant materials such as waste tungsten blocks and tungsten plates, the protective array is arranged in an alternate arrangement mode, and flame sprayed by the gas burner 11 is separated from the tungsten tube 30 on the basis of ensuring heat transfer.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application and are intended to be included within the scope of the present application.
Claims (6)
1. A coal gasification production system, comprising: the system comprises a vertical fixed gasification furnace (66), a pulverized coal bin (5), an oxygen heat exchanger (27), a slag cooler (81), a pulverized coal distributor (80), a CO heat exchanger (1), a first dust remover (3), a first induced draft fan (4), a regenerative furnace (12), a second dust remover (6), a second induced draft fan (7), a liquid oxygen station (9) and a third induced draft fan (10);
the vertical fixed gasification furnace (66) is provided with a combustion chamber (13), a gas chamber (67), a hearth and a slag collection chamber (68), and the hearth is provided with a tungsten pipe (30) and a flue gas outlet (25); the combustion chamber (13) is provided with a gas burner (11); the slag collection chamber (68) is provided with a slag outlet (8), and the slag outlet (8) is connected to a slag cooler (81);
the lower part of a tungsten pipe (30) in the vertical fixed gasification furnace (66) is a molten pool, the height of the molten pool is the height of the tungsten pipe 1/3, and the molten pool is formed by melting gasified ash; the upper part of the tungsten tube (30) is a solid raw material layer, and the height of the solid raw material layer is 2/3 of the height of the tungsten tube; or the tungsten tube (30) is completely filled with a solid raw material layer; or the tungsten tube (30) is filled with a molten pool completely;
the coal powder bin (5) is connected to the tungsten tube (30) through a coal powder distributor (80); the upper part of the tungsten pipe (30) is communicated with a gas chamber (67), and the lower part of the tungsten pipe is connected with a slag collecting chamber (68);
an outlet of the gas chamber (67) is sequentially connected with the first dust remover (3) and the first induced draft fan (4) through a tube pass of the CO heat exchanger (1); the outlet of the first induced draft fan (4) is divided into two paths, one path is directly connected with the product outlet of the coal gasification production system, and the other path is connected with the heat release inlet of the regenerative furnace (12);
the flue gas outlet (25) is connected with a heat absorption inlet of the heat storage furnace (12), a heat absorption outlet of the heat storage furnace (12) is divided into three paths after passing through a second dust remover (6) and a second induced draft fan (7), and the first path is connected with a tube pass inlet of the CO heat exchanger (1); the second path is connected with the pulverized coal distributor (80) and is used as conveying gas and gasifying agent of pulverized coal; the third path is connected with a heat release inlet of the regenerative furnace (12);
the heat release outlet of the heat storage furnace (12) is connected with the gas burner (11); an oxygen outlet of the liquid oxygen station (9) is also connected with the gas burner (11) through the shell side of the oxygen heat exchanger (27);
a tube pass outlet of the oxygen heat exchanger (27) is connected with a shell pass of the CO heat exchanger (1) through a third induced draft fan (10), and a shell pass outlet of the CO heat exchanger (1) is connected with a tube pass inlet of the oxygen heat exchanger (27);
the regenerative furnace (12) is provided with two regenerative furnaces, and a heating process and a cooling process can be alternately carried out so as to ensure the continuous operation of the system; each dust remover in the coal gasification production system has the function of removing water vapor, hydrogen and sulfide on the basis of the dust removing function, thereby protecting the tungsten tube (30) and prolonging the service life of the tungsten tube (30).
2. The coal gasification production system according to claim 1, wherein the furnace of the vertical fixed gasification furnace (66) is divided into a low-temperature gasification stage (77), a medium-temperature gasification stage (78) and a high-temperature gasification stage (79) from top to bottom; the channels of the low-temperature gasification section (77), the medium-temperature gasification section (78) and the high-temperature gasification section (79) are connected in a back-turning way; the combustion chamber (13) is arranged at the inlet of the high-temperature gasification section (79); the outlet of the low-temperature gasification section (77) is a flue gas outlet (25).
3. The coal gasification production system according to claim 1, wherein an intermediate pipe (76) is provided in the tungsten pipe (30), and the intermediate pipe (76) is connected to a pulverized coal distributor (80).
4. The coal gasification production system according to claim 1, wherein the tungsten tube (30) is prepared by: the method has the advantages that metal tungsten is printed on two sides of the graphite layer, or pure metal tungsten is adopted for preparation; the diameter of the tungsten tube (30) is 80-150mm, and the length of the tungsten tube is 300-800 mm.
5. The coal gasification production system according to claim 4, wherein potassium oxide, sodium oxide or calcium oxide is added to the raw material as a flux to lower the ash melting point of the ash.
6. The coal gasification production system of claim 1, wherein the coal gasification production system is fed in multiple frequency and less feed modes; the coal entering the coal gasification production system needs to be dried and dehydrated in advance; the tungsten tube (30) is made of ferrotungsten instead of ferrotungsten.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110557738.8A CN113234484B (en) | 2021-05-21 | 2021-05-21 | Coal gasification production system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110557738.8A CN113234484B (en) | 2021-05-21 | 2021-05-21 | Coal gasification production system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113234484A CN113234484A (en) | 2021-08-10 |
| CN113234484B true CN113234484B (en) | 2022-06-24 |
Family
ID=77138237
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110557738.8A Active CN113234484B (en) | 2021-05-21 | 2021-05-21 | Coal gasification production system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113234484B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009286834A (en) * | 2008-05-27 | 2009-12-10 | Central Res Inst Of Electric Power Ind | Coal gasification equipment and coal gasification power generation system |
| CN103436296A (en) * | 2013-09-11 | 2013-12-11 | 上海泽玛克敏达机械设备有限公司 | Slag gasifier for pressurized fixed bed |
| CN104004548A (en) * | 2013-02-22 | 2014-08-27 | 石家庄新华能源环保科技股份有限公司 | Coal gasification production device |
| CN107446628A (en) * | 2017-10-13 | 2017-12-08 | 江西昌昱实业有限公司 | A kind of new fixed bed slag gasification reacting furnace and its gas making method |
| CN109897672A (en) * | 2019-03-01 | 2019-06-18 | 上海柯来浦能源科技有限公司 | The device and method produced using circulation of tail gas coal gasification |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101597658B (en) * | 2009-07-10 | 2010-12-08 | 东北大学 | Coal gasification system and method of blast furnace slags |
| CN101597657B (en) * | 2009-07-10 | 2011-02-16 | 东北大学 | Compound coal gasification system and method of blast furnace slags |
| CN107418634B (en) * | 2017-09-15 | 2023-05-16 | 中科清能燃气技术（北京）有限公司 | Multistage cooling and dedusting process and device for circulating fluidized bed coal gasification |
-
2021
- 2021-05-21 CN CN202110557738.8A patent/CN113234484B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009286834A (en) * | 2008-05-27 | 2009-12-10 | Central Res Inst Of Electric Power Ind | Coal gasification equipment and coal gasification power generation system |
| CN104004548A (en) * | 2013-02-22 | 2014-08-27 | 石家庄新华能源环保科技股份有限公司 | Coal gasification production device |
| CN103436296A (en) * | 2013-09-11 | 2013-12-11 | 上海泽玛克敏达机械设备有限公司 | Slag gasifier for pressurized fixed bed |
| CN107446628A (en) * | 2017-10-13 | 2017-12-08 | 江西昌昱实业有限公司 | A kind of new fixed bed slag gasification reacting furnace and its gas making method |
| CN109897672A (en) * | 2019-03-01 | 2019-06-18 | 上海柯来浦能源科技有限公司 | The device and method produced using circulation of tail gas coal gasification |
Also Published As
| Publication number | Publication date |
|---|---|
| CN113234484A (en) | 2021-08-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106554826B (en) | Circulating fluidized bed coal gasification method and device with fine ash fusion | |
| RU2453609C2 (en) | Method and device for obtaining molten material | |
| CN101603104A (en) | CO in blast furnace and the coal gas of converter 2Separation and Recovery and cyclic utilization method | |
| CN101250419A (en) | Coal gas internal heating low-temperature cracking process | |
| CN105039628A (en) | Full-coal-based self-heat-supply direct reduction process and shaft furnace | |
| UA119892C2 (en) | Metallurgical furnace for producing metal alloys | |
| CN203079923U (en) | Coal water slurry pressurized gasification device for water wall waste boiler process | |
| CN113184852A (en) | Production device for calcium carbide co-production lime | |
| US8551213B2 (en) | Method of coal gasification and direct ironmaking and system therefor | |
| CN113234484B (en) | Coal gasification production system | |
| CN101307371A (en) | Method for directly reducing reduce gas in iron by heating red coke | |
| CN1046962C (en) | Process for producing liquid raw iron or liquid steel base products and sponge iron and plant for implementing it | |
| KR101607254B1 (en) | Combiner Ironmaking facilities | |
| CN208222489U (en) | A kind of phenol wastewater and the waste coke mixed burning system that gasifies | |
| CN101307372A (en) | Device for manufacturing and reducing crust pellet and production process | |
| CN116854381A (en) | Lime apparatus for producing | |
| CN113277513B (en) | Calcium carbide co-production system | |
| CN112646605B (en) | Double-layer furnace body fixed bed gasification furnace and organic solid waste gasification method | |
| CN103937922A (en) | Mixing reduction iron-making equipment and iron-making method | |
| KR101607253B1 (en) | Combiner ironmaking facilities | |
| CN210287240U (en) | Combined bed coal gasification system | |
| CN101210201A (en) | Dry coal dust gasification furnace | |
| KR101660696B1 (en) | Tar decomposition device, apparatus and method for manufacturing molten irons | |
| CN111218535A (en) | Method for producing direct reduced iron by heating circulating reducing gas in gas production of molten iron bath coal | |
| CN201006867Y (en) | Dry coal powder gasifying stove |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |