CN109231213B - Environment-friendly energy-saving mountain-shaped silicon carbide smelting tail gas recovery device and recovery method - Google Patents
Environment-friendly energy-saving mountain-shaped silicon carbide smelting tail gas recovery device and recovery method Download PDFInfo
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- CN109231213B CN109231213B CN201810986151.7A CN201810986151A CN109231213B CN 109231213 B CN109231213 B CN 109231213B CN 201810986151 A CN201810986151 A CN 201810986151A CN 109231213 B CN109231213 B CN 109231213B
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B32/00—Carbon; Compounds thereof
- C01B32/90—Carbides
- C01B32/914—Carbides of single elements
- C01B32/956—Silicon carbide
- C01B32/963—Preparation from compounds containing silicon
- C01B32/97—Preparation from SiO or SiO2
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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
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- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
Abstract
The invention provides an environment-friendly energy-saving mountain-shaped silicon carbide smelting tail gas recovery device, which is provided with two end walls, a reactant is piled on the ground between the end walls, gas collecting walls and a nitrogen charging device are arranged on two sides of a heat preservation material, and an airtight film is covered on the outer surface of the reactant.
Description
Technical Field
The invention relates to the technical field of silicon carbide production, in particular to an environment-friendly and energy-saving mountain-shaped silicon carbide smelting tail gas recovery device and a recovery method.
Background
The industrial synthetic silicon carbide is produced by taking quartz sand and petroleum coke or high-quality anthracite as raw materials through high-temperature carbothermal reduction reaction, and a large amount of gas taking CO as a main component is released while the silicon carbide product is synthesized. However, in recent years, the climate change caused by environmental pollution has become a problem that people have to pay attention to, in order to respond to the national energy-saving and environment-friendly policy, many enterprises change ideas and adjust management ideas, and the rough operation mode with high energy consumption, high pollution and high emission is changed into the production mode with energy saving, consumption reduction and environment protection, while the mountain-shaped furnace is gradually eliminated due to the high energy consumption and high pollution, for collecting CO, a furnace cover can be used for collecting CO, a large space exists between a reactant and the furnace cover, the space is filled with air, oxygen in the air and CO are mixed together, and explosion accidents can easily occur.
Disclosure of Invention
In view of the foregoing, there is a need for an environment-friendly and energy-saving mountain-shaped silicon carbide smelting tail gas recovery device for producing silicon carbide, which can effectively collect CO gas without a blast furnace safety accident.
It is also necessary to provide an environment-friendly and energy-saving mountain-shaped silicon carbide smelting tail gas recovery method.
An environment-friendly energy-saving mountain-shaped silicon carbide smelting tail gas recovery device comprises two end walls, wherein an airtight layer is adhered to the outer side end surfaces of the end walls, a first sealing groove is arranged at the top of each end wall, a direct current positive electrode end is arranged in the middle of one end wall, a direct current negative electrode end is arranged in the middle of the other end wall, a reactant is connected between the two end walls, the reactant is in a linear or U-shaped shape, the reactant comprises a furnace core, a reactant and a heat preservation material from inside to outside, the furnace core is positioned in the center of the reactant, the furnace core is formed by paving powdery graphite, one end of the furnace core is electrically connected with the direct current positive electrode end on one end wall, the other end of the furnace core is electrically connected with the direct current negative electrode end on the other end wall, the reactant is wrapped around the furnace core, the reactant takes the furnace core as the center, extends around the cross section direction of the furnace core, the heat preservation material is wrapped outside the reactant, the heat preservation material takes the reaction material as the center, extends to the periphery along the cross section direction of the reaction material, the outer surface of the heat preservation material forms a mountain-shaped edge, the end surfaces of the two end walls are also arranged into a mountain shape which is the same as the cross section of the reaction body, the two sides of the heat preservation material are also provided with gas collecting devices, each gas collecting device comprises a gas collecting wall, a gas collecting branch pipe, a gas collecting main pipe and a negative pressure fan, the gas collecting walls are arranged at the two sides of the reaction body along the length direction of the reaction body, the height of each gas collecting wall is lower than the height of the reaction body, the top of each gas collecting wall is provided with a second sealing groove along the length direction of the gas collecting wall, the two ends of each second sealing groove are respectively communicated with the first sealing grooves on the two end walls, the outer surfaces of the reaction body are covered with airtight films, the front end and the rear end of each airtight film are embedded into the first sealing grooves, the left end and the right end of each airtight film are embedded into the second sealing grooves, the two gas collecting walls, the two end walls, the airtight film jointly forms a closed body without a cavity, the reaction body is contained in the closed body, a hollow gas collecting chamber is arranged in a gas collecting wall, a plurality of partition plates are arranged in the gas collecting chamber along the length direction of the gas collecting chamber so as to divide the gas collecting chamber into a plurality of mutually independent gas collecting chambers, a plurality of ventilation holes are formed in the side wall, which is in contact with the reaction body, of the gas collecting wall, one end of each ventilation hole is communicated with the gas collecting chamber, the other end of each ventilation hole is communicated with the inside of the closed body, a ventilation layer is further stuck on the side wall, which is in contact with the reaction body, so that the end face of each ventilation hole is covered by the gas permeable layer, a plurality of gas collecting branch pipes are arranged on the side wall, which is in contact with the reaction body, one end of each gas collecting branch pipe is communicated with the gas collecting chamber, one end of each gas collecting branch pipe is closed, the other end of each gas collecting main pipe is opened, the other end of each gas collecting main pipe is connected with a negative pressure fan, nitrogen charging devices are further arranged on two sides of the heat insulating material, each nitrogen charging device is provided with a plurality of nitrogen gas output pipes, and at least one nitrogen output pipe is correspondingly communicated with one gas collecting chamber.
Preferably, the cross section of the furnace core is rectangular, the reaction material comprises a part material, two parts material, three parts material and four parts material, the part material is positioned below the furnace core, the cross section of the part material is inverted trapezoid, the two parts material is positioned above the furnace core, the cross section of the part material is rectangular, the three parts material is two groups and is positioned at two sides of the furnace core, the cross section of the three parts material is rectangular, the height of the three parts material is equal to the sum of the heights of the two parts material and the furnace core, the four parts material is positioned above the two parts material, and the four parts material is trapezoid.
Preferably, one part of the material is composed of four layers of reaction materials with different thicknesses from top to bottom, the four parts of the material is composed of two layers of reaction materials with different thicknesses from top to bottom, the lower layers of the four parts of the material are trapezoidal, the upper layers of the four parts of the material are covered on the lower layers of the four parts of the material, and the section of the upper layers of the four parts of the material is umbrella-shaped.
An environment-friendly energy-saving mountain-shaped silicon carbide smelting tail gas recovery method comprises the following steps:
step one: a first layer of heat preservation material is paved on the ground in the area surrounded by the two end walls and the two gas collecting walls, a first cavity with an inverted trapezoid cross section is reserved in the middle of the first layer of heat preservation, and four layers of materials are paved in the first cavity from bottom to top in sequence;
step two: respectively arranging two material separating plates with the same cross section as the three material separating plates on the left side and the right side above one material separating plate, sequentially paving graphite powder and two materials from bottom to top in a gap between the two material separating plates, forming a furnace core by the graphite powder, respectively connecting a direct current positive electrode end and a direct current negative electrode end with two ends of the furnace core, and paving a second layer of heat preservation material on two opposite sides of the material separating plates;
step three: taking out two material separating plates, emptying the two material separating plates to form two second cavities, and respectively filling three materials into the two second cavities;
step four: sequentially paving two layers of four materials above the three materials and the two materials from bottom to top, and paving a third layer of heat preservation material on the outer surfaces of the four materials;
step five: laying an airtight film, burying a first seal groove in the front edge and the rear edge of the airtight film, and burying a second seal groove in the left edge and the right edge of the airtight film;
step six: the gas collecting branch pipe is connected with the gas collecting main pipe, and the gas collecting main pipe is connected with the negative pressure fan.
According to the invention, the first sealing groove and the second sealing groove are respectively buried in the front edge, the rear edge and the left edge of the airtight film, so that the sealing problem is solved, the air content of the recovered gas in the reaction body is ensured to be smaller than a safety threshold value, the built-in gas collecting wall is adopted for exhausting, and the nitrogen charging device is used for carrying out nitrogen replacement on the gas collecting chamber arranged in the gas collecting wall, so that the exhaust of the reaction body can be enhanced, the defect that the explosion furnace is caused by the fact that a certain amount of air is entrained in CO gas due to the fact that an exhaust channel is required to be arranged for external exhausting can be solved, the sufficient exhaust in the reaction process is ensured, and the problem that the gas collection of the mountain-shaped furnace puzzled in the industry for a long time is difficult is solved.
Drawings
FIG. 1 is a cross-sectional view of the environment-friendly and energy-saving mountain-shaped silicon carbide smelting tail gas recycling device.
Fig. 2 is a schematic structural diagram of the environmental protection and energy saving mountain-shaped silicon carbide smelting tail gas recovery device.
Fig. 3 is a schematic diagram of another structure of the environmental protection and energy saving mountain-shaped silicon carbide smelting tail gas recovery device.
Fig. 4 is an enlarged view of a portion of the environmental protection and energy saving mountain-shaped silicon carbide smelting tail gas recycling apparatus shown in fig. 1.
In the figure: the end wall 10, the first sealing groove 11, the direct current positive electrode terminal 12, the direct current negative electrode terminal 13, the reactant 20, the furnace core 21, the reactant 22, the first part 221, the second part 222, the third part 223, the fourth part 224, the heat preservation material 23, the gas collecting device 30, the gas collecting wall 31, the second sealing groove 311, the gas collecting chamber 312, the ventilation holes 313, the gas collecting branch pipe 32, the gas impermeable film 40 and the nitrogen charging device 50.
Detailed Description
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Referring to fig. 1 to 4, the embodiment of the invention provides an environment-friendly and energy-saving mountain-shaped silicon carbide smelting tail gas recovery device, which is provided with two end walls 10, wherein an airtight layer is stuck to the outer end surfaces of the end walls 10, a first sealing groove 11 is arranged at the top of each end wall 10, a direct current positive electrode end 12 is arranged in the middle of one end wall 10, a direct current negative electrode end 13 is arranged in the middle of the other end wall 10, a reactant 20 is connected between the two end walls 10, the reactant 20 is in a linear or U shape, the reactant 20 comprises a furnace core 21, a reactant 22 and a heat preservation material 23 from inside to outside, the furnace core 21 is positioned in the center of the reactant 20, the furnace core 21 is paved by powdery graphite, one end of the furnace core 21 is electrically connected with the direct current positive electrode end 12 on one end wall 10, the other end of the furnace core 21 is electrically connected with the direct current negative electrode end 13 on the other end wall 10, the periphery of the furnace core 21 is wrapped with the reactant 22, the reaction material 22 takes the furnace core 21 as the center, extends to the periphery along the cross section direction of the furnace core 21, the heat preservation material 23 is wrapped outside the reaction material 22, the heat preservation material 23 takes the reaction material 22 as the center, extends to the periphery along the cross section direction of the reaction material 22, the outer surface of the heat preservation material 23 forms a mountain-shaped edge, the end surfaces of the two end walls 10 are also arranged into a mountain shape with the same cross section as the reaction body 20, the two sides of the heat preservation material 23 are also provided with gas collecting devices 30, the gas collecting devices 30 comprise gas collecting walls 31, gas collecting branch pipes 32, gas collecting main pipes and negative pressure fans, the gas collecting walls 31 are arranged at the two sides of the reaction body 20 along the length direction of the reaction body 20, the height of the gas collecting walls 31 is lower than the height of the reaction body 20, the top of the gas collecting walls 31 is provided with second sealing grooves 311 along the length direction of the gas collecting walls 31, the two ends of the second sealing grooves 311 are respectively communicated with the first sealing grooves 11 on the two end walls 10, the outer surface of the reaction body 20 is covered with an airtight film 40, the front end and the rear end of the airtight film 40 are embedded into a first sealing groove 11, the left end and the right end of the airtight film 40 are embedded into a second sealing groove 311, two gas collecting walls 31, two end walls 10 and the airtight film 40 together form a closed body without a cavity, the reaction body 20 is contained in the closed body, a hollow gas collecting chamber 312 is arranged in the gas collecting wall 31, a plurality of partition plates are arranged in the gas collecting chamber 312 along the length direction of the gas collecting chamber 312 so as to divide the gas collecting chamber 312 into a plurality of mutually independent gas collecting chambers, a plurality of ventilation holes 313 are arranged on the side wall, which is contacted with the reaction body 20, of the gas collecting wall 31, one end of each ventilation hole 313 is communicated with the inside the closed body, the other end of each ventilation hole 313 is communicated with the inside the closed body, a plurality of gas collecting branch pipes 32 are arranged on the side wall, which is contacted with the reaction body 20, a plurality of gas collecting air collecting pipes 32 are arranged on the side wall, one end of each gas collecting wall 31 is covered with the side wall, one end of the gas collecting pipe is communicated with the nitrogen collecting pipe, one end of the other is communicated with the nitrogen collecting pipe 50, the other end of the nitrogen collecting pipe is communicated with the nitrogen gas collecting pipe is provided with the other, and the nitrogen collecting pipe is communicated with the nitrogen collecting pipe 50, and the nitrogen collecting pipe is communicated with the other, and the nitrogen collecting pipe is provided with the corresponding air pipe.
The heat-insulating material 23 can be recycled by adopting the reaction material 22 with poor quality, so that the generation of a large amount of dead materials is avoided, and the airtight film 40 can be a plastic film or canvas.
In the present invention, the length of the reaction body 20 is about 150m, so that the sealing of the end wall 10 is implemented relative to the side wall of the channel furnace for industrially synthesizing silicon carbide, because the end wall 10 provided with the airtight layer, the gas collecting wall 31 and the airtight film 40 covered on the surface of the reaction body 20 form a closed body without a cavity, the front edge, the rear edge and the left edge of the airtight film 40 are respectively embedded with the first sealing groove 11 and the second sealing groove 311, the good sealing performance of the device is ensured, and for the channel furnace, the side walls are arranged on the two sides of the furnace body along the length direction of the furnace body, even if the airtight film 40 is adopted for ensuring the sealing, a large cavity containing a large amount of air is formed between the side wall and the airtight film 40 due to the high side wall, and the blast furnace or explosion accident is unavoidable.
The mountain-shaped furnace for industrially synthesizing the silicon carbide has no end wall 10 and no side wall, is only a material pile piled into a small mountain shape, has good air permeability, is more suitable for synthesizing the silicon carbide, can reuse the advantage of good air permeability for producing the silicon carbide, can recycle CO gas at the same time, and does not generate explosion accidents, and is the main technical problem to be solved.
The air collection wall 31 is internally arranged at one side of the closed body to exhaust air, so that the adoption of a furnace cover mode is avoided, an exhaust channel is reserved between the furnace cover and the reaction body 20, air is contained in the exhaust channel, and the air exhaust channel is connected with the exhaust channels containing air, so that the air is entrained into the collected CO gas together to cause a blast furnace or explosion safety accident.
Based on the above problems, the nitrogen filling device 50 is further arranged, nitrogen is introduced into the gas collecting cavity through the nitrogen filling device 50 before each production, and then the gas in the gas collecting cavity is pumped out through the negative pressure fan, so that the nitrogen replacement of the gas collecting cavity is realized, and the explosion accident caused by that the air in the gas collecting cavity is pumped out together by the gas collecting device 30 in the production process is avoided. In addition, under the condition of longer replacement time, the air in the reactant 20 can be replaced, the gas collection chamber 312 in the gas collection wall 31 forms an atmosphere-controllable exhaust channel, which is more beneficial to the exhaust of the reactant 20,
as is well known, the synthesis of silicon carbide is an exhaust reaction, and as mentioned above, the outer surface of the reaction body 20 is covered with the gas-impermeable film 40, which is unfavorable for the reaction, and the synthesis of silicon carbide using a mountain-shaped furnace at home and abroad is mostly not considered to collect CO gas or only concentrated discharge, based on the above knowledge, few people collect CO gas using a means of closing the furnace body, and it is widely recognized in the industry that the mountain-shaped furnace can use a furnace cover to collect gas, but the popularization thereof is greatly limited because of unavoidable accidents of spraying and frying.
In summary, solving the furnace body sealing and specific exhaust modes is to synthesize silicon carbide by using a gable furnace, and meanwhile, effectively recycling CO gas is the key of the problem.
The invention adopts the airtight film 40 to cover, the front and rear edges and the left and right edges of the airtight film 40 are respectively embedded into the first sealing groove 11 and the second sealing groove 311, the sealing problem is solved, the air content of the recovered gas in the reaction body 20 is ensured to be smaller than a safety threshold value, the built-in gas collecting wall 31 is adopted for exhausting, the nitrogen charging device 50 is used for carrying out nitrogen replacement on the gas collecting chamber 312 arranged in the gas collecting wall 31, the exhaust of the reaction body 20 can be enhanced, the defect that the explosion furnace is caused because a certain amount of air is entrained in CO gas due to the need of arranging an exhaust channel for external exhausting can be solved, the sufficient exhaust in the reaction process is ensured, and the problem that the gas collection of a mountain-shaped furnace which is long-term puzzled with industry is difficult is solved.
Referring to fig. 1, further, the cross section of the furnace core 21 is rectangular, the reaction material 22 includes a first material 221, a second material 222, a third material 223, and a fourth material 224, the first material 221 is located below the furnace core 21, the cross section of the first material 221 is in an inverted trapezoid, the second material 222 is located above the furnace core 21, the cross section of the second material 222 is rectangular, the third material 223 is in two groups and is located at two sides of the furnace core 21, the cross section of the third material 223 is rectangular, the height of the third material 223 is equal to the sum of the heights of the second material 222 and the furnace core 21, the fourth material 224 is located above the second material 222, and the fourth material 224 is in a trapezoid.
Referring to fig. 1, further, a part 221 is formed by four layers of reaction materials 22 with different thicknesses from top to bottom, a four part 224 is formed by two layers of reaction materials 22 with different thicknesses from top to bottom, the lower layer of the four part 224 is trapezoid, the upper layer of the four part 224 covers the lower layer of the four part 224, and the section of the upper layer of the four part 224 is umbrella-shaped.
The material distribution mode is designed based on convenient and feasible furnace construction, and in actual production, the furnace construction can be completed by only one crown block.
The invention also provides an environment-friendly and energy-saving mountain-shaped silicon carbide smelting tail gas recovery method, which comprises the following steps of:
step one: a first layer of heat preservation material 23 is paved on the ground in the area surrounded by the two end walls 10 and the two gas collecting walls 31, a first cavity with an inverted trapezoid cross section is reserved in the middle of the first layer of heat preservation, and four layers of materials 221 are paved in the first cavity from bottom to top in sequence;
step two: placing two material separating plates with the same cross section as the cross section of the three materials 223 on the left side and the right side above the one material 221 respectively, sequentially paving graphite powder and two materials 222 from bottom to top in a gap between the two material separating plates to form a furnace core 21, connecting a direct current positive electrode end 12 and a direct current negative electrode end 13 with two ends of the furnace core 21 respectively, and paving a second layer of heat preservation material 23 on two opposite sides of the material separating plates;
step three: taking out the two material separating plates, emptying the two material separating plates to form two second cavities, and respectively filling three materials 223 into the two second cavities;
step four: two layers of four materials 224 are sequentially paved above the three materials 223 and the two materials 222 from bottom to top, and a third layer of heat preservation material 23 is paved on the outer surfaces of the four materials 224;
step five: laying an airtight film 40, burying the front and rear edges of the airtight film 40 into a first seal groove 11, and burying the left and right edges of the airtight film 40 into a second seal groove 311;
step six: the gas collecting branch pipe 32 is connected with a gas collecting main pipe, and the gas collecting main pipe is connected with a negative pressure fan.
The reaction process for producing silicon carbide by adopting the device comprises the following steps: the furnace core 21 is powered on, the first part material 221, the second part material 222, the third part material 223 and the fourth part material 224 are heated, the first part material 221, the second part material 222, the third part material 223 and the fourth part material 224 are gradually reacted from inside to outside by taking the furnace core 21 as a center to form a silicon carbide crystallization cylinder, and gas generated by the reaction diffuses out from the pores between the reaction material 22 and the heat preservation material 23, and then sequentially passes through the ventilation layer, the ventilation holes 313, the gas collecting cavity, the gas collecting branch pipe 32, the gas collecting main pipe and finally is collected.
The heat-insulating layer can also adopt normal reaction material 22, and the position of the heat-insulating layer can not reach the reaction temperature, so that the reaction at the position is terminated, and the reaction material 22 serving as the heat-insulating layer can be recycled.
The steps in the method of the embodiment of the invention can be sequentially adjusted, combined and deleted according to actual needs.
The modules or units in the device of the embodiment of the invention can be combined, divided and deleted according to actual needs.
The foregoing disclosure is illustrative of the preferred embodiments of the present invention, and is not to be construed as limiting the scope of the invention, as it is understood by those skilled in the art that all or part of the above-described embodiments may be practiced with equivalents thereof, which fall within the scope of the invention as defined by the appended claims.
Claims (4)
1. An environmental protection and energy saving mountain shape carborundum smelting tail gas recovery unit, its characterized in that: the device is provided with two end walls, the outer side end surfaces of the end walls are respectively stuck with an airtight layer, the top of one end wall is provided with a first sealing groove, the middle part of the other end wall is provided with a direct current positive electrode end, the middle part of the other end wall is provided with a direct current negative electrode end, a reactant is connected between the two end walls and is in a linear or U shape, the reactant comprises a furnace core, a reactant and a heat preservation material from inside to outside, the furnace core is positioned in the center of the reactant, the furnace core is formed by paving powdery graphite, one end of the furnace core is electrically connected with the direct current positive electrode end on one end wall, the other end of the furnace core is electrically connected with the direct current negative electrode end on the other end wall, the periphery of the furnace core is wrapped with the reactant, the reactant takes the furnace core as the center, the periphery extends along the cross section direction of the furnace core, the heat preservation material is wrapped outside the reactant as the center, the reactant extends to the periphery along the cross section direction of the reactant, the outer surface of the heat preservation material forms a mountain-shaped edge, the end surfaces of the two end walls are also arranged into a mountain shape with the same cross section as the reaction body, the two sides of the heat preservation material are also provided with gas collecting devices, each gas collecting device comprises a gas collecting wall, a gas collecting branch pipe, a gas collecting main pipe and a negative pressure fan, the gas collecting walls are arranged on the two sides of the reaction body along the length direction of the reaction body, the height of each gas collecting wall is lower than the height of the reaction body, the top of each gas collecting wall is provided with a second sealing groove along the length direction of the gas collecting wall, the two ends of each second sealing groove are respectively communicated with the first sealing grooves of the two end walls, the outer surface of the reaction body is covered with a gas-proof film, the front end and the rear end of each gas-proof film are embedded into the first sealing grooves, the left end and the right end of each gas-proof film are embedded into the second sealing grooves, the two gas collecting walls, the two end walls and the gas-proof film jointly form a cavity-free sealing body, the reaction body is contained inside the sealing body, the gas collecting wall is internally provided with a hollow gas collecting chamber, a plurality of partition plates are arranged in the gas collecting chamber along the length direction of the gas collecting chamber so as to divide the gas collecting chamber into a plurality of mutually independent gas collecting chambers, a plurality of vent holes are formed in the side wall, which is contacted with the reaction body, of the gas collecting wall, one end of each vent hole is communicated with the gas collecting chamber, the other end of each vent hole is communicated with the inside of the sealing body, a gas permeable layer is further stuck on the side wall, which is contacted with the reaction body, of the gas collecting wall so as to cover the end face of each vent hole through the gas permeable layer, a plurality of gas collecting branch pipes are arranged on the side wall, which is contacted with the reaction body, one end of each gas collecting branch pipe is communicated with the gas collecting chamber, one end of each gas collecting branch pipe is communicated with the gas collecting main pipe, one end of each gas collecting main pipe is closed, the other end of each gas main pipe is opened, the open end of each gas main pipe is connected with the negative pressure fan, and nitrogen charging devices are further arranged on two sides of the heat insulating material and are provided with a plurality of nitrogen output pipes, and at least one nitrogen output pipe is correspondingly communicated with one gas collecting chamber.
2. The environmental protection and energy saving mountain shape carborundum smelting tail gas recovery unit of claim 1, wherein: the cross section of the furnace core is rectangular, the reaction material comprises a first material, a second material, a third material and four materials, the first material is positioned below the furnace core, the cross section of the first material is in an inverted trapezoid, the second material is positioned above the furnace core, the cross section of the second material is rectangular, the third material is in two groups and is positioned on two sides of the furnace core, the cross section of the third material is rectangular, the height of the third material is equal to the sum of the heights of the second material and the furnace core, the four materials are positioned above the second material, and the four materials are in a trapezoid.
3. The environmental protection and energy saving mountain shape carborundum smelting tail gas recovery unit of claim 2, wherein: one part of the material is composed of four layers of reaction materials with different thicknesses from top to bottom, the four parts of the material is composed of two layers of reaction materials with different thicknesses from top to bottom, the lower layers of the four parts of the material are trapezoidal, the upper layers of the four parts of the material are covered on the lower layers of the four parts of the material, and the section of the upper layers of the four parts of the material is umbrella-shaped.
4. An environment-friendly and energy-saving mountain-shaped silicon carbide smelting tail gas recycling method, which is characterized by being realized by using the environment-friendly and energy-saving mountain-shaped silicon carbide smelting tail gas recycling device as set forth in any one of claims 1-3, and comprising the following steps:
step one: a first layer of heat preservation material is paved on the ground in the area surrounded by the two end walls and the two gas collecting walls, a first cavity with an inverted trapezoid cross section is reserved in the middle of the first layer of heat preservation, and four layers of materials are paved in the first cavity from bottom to top in sequence;
step two: respectively arranging two material separating plates with the same cross section as the three material separating plates on the left side and the right side above one material separating plate, sequentially paving graphite powder and two materials from bottom to top in a gap between the two material separating plates, forming a furnace core by the graphite powder, respectively connecting a direct current positive electrode end and a direct current negative electrode end with two ends of the furnace core, and paving a second layer of heat preservation material on two opposite sides of the material separating plates;
step three: taking out two material separating plates, emptying the two material separating plates to form two second cavities, and respectively filling three materials into the two second cavities;
step four: sequentially paving two layers of four materials above the three materials and the two materials from bottom to top, and paving a third layer of heat preservation material on the outer surfaces of the four materials;
step five: laying an airtight film, burying a first seal groove in the front edge and the rear edge of the airtight film, and burying a second seal groove in the left edge and the right edge of the airtight film;
step six: the gas collecting branch pipe is connected with the gas collecting main pipe, and the gas collecting main pipe is connected with the negative pressure fan.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102557030A (en) * | 2011-12-09 | 2012-07-11 | 邵水源 | Tail gas collecting system of silicon carbide smelting furnace |
| CN203112514U (en) * | 2013-03-19 | 2013-08-07 | 伊犁麦斯特碳化硅制品有限公司 | Waste gas safe recovery device applied to standardized carbonized silicon smelting furnace |
| CN104760957A (en) * | 2015-01-21 | 2015-07-08 | 北京均方理化科技研究所 | Exhaust gas recovery system of silicon carbide smelting technology |
| CN209276165U (en) * | 2018-08-28 | 2019-08-20 | 平罗县滨河碳化硅制品有限公司 | Environmental protection and energy saving chevron silicon carbide smelting device for recovering tail gas |
Family Cites Families (2)
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| CN102557030A (en) * | 2011-12-09 | 2012-07-11 | 邵水源 | Tail gas collecting system of silicon carbide smelting furnace |
| CN203112514U (en) * | 2013-03-19 | 2013-08-07 | 伊犁麦斯特碳化硅制品有限公司 | Waste gas safe recovery device applied to standardized carbonized silicon smelting furnace |
| CN104760957A (en) * | 2015-01-21 | 2015-07-08 | 北京均方理化科技研究所 | Exhaust gas recovery system of silicon carbide smelting technology |
| CN209276165U (en) * | 2018-08-28 | 2019-08-20 | 平罗县滨河碳化硅制品有限公司 | Environmental protection and energy saving chevron silicon carbide smelting device for recovering tail gas |
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