CN109231213A

CN109231213A - Environmental protection and energy saving chevron silicon carbide smelting device for recovering tail gas and recovery method

Info

Publication number: CN109231213A
Application number: CN201810986151.7A
Authority: CN
Inventors: 张海波
Original assignee: PINGLUO BINHE SIC CO Ltd
Current assignee: PINGLUO BINHE SIC CO Ltd
Priority date: 2018-08-28
Filing date: 2018-08-28
Publication date: 2019-01-18
Anticipated expiration: 2038-08-28
Also published as: CN109231213B

Abstract

A kind of environmental protection and energy saving chevron silicon carbide smelting device for recovering tail gas, there are two headwalls for device tool, heap has reactant on ground between headwall, gas collection wall is additionally provided in insulation material two sides, nitrogen charging device, airtight film is covered in reaction external surface, the present invention is using the airtight film of covering, the front and rear edges of airtight film, left and right edges have been embedded to the first seal groove respectively, second seal groove, solves the problems, such as sealing, guarantee that the air content of gas recovery in reactant is less than safe threshold, it is evacuated using built-in gas collection wall, nitrogen charging device carries out nitrogen displacement to the collection chamber that gas collection is arranged within the walls, can intensified response body exhaust, it can solve external pumping again and need to be arranged exhaust passage bring and carry the drawbacks of a certain amount of air enters in CO gas and causes fryer secretly, it ensure that the abundant exhaust of reaction process, it solves The problem of the chevron furnace getter hardly possible of long-standing problem industry, the present invention also propose a kind of environmental protection and energy saving chevron silicon carbide smelting method for recovering tail gas.

Description

Environmental protection and energy saving chevron silicon carbide smelting device for recovering tail gas and recovery method

Technical field

The present invention relates to silicon carbide production technical field, in particular to a kind of environmental protection and energy saving chevron silicon carbide smelting tail gas returns Receiving apparatus and recovery method.

Background technique

Commercial synthesis silicon carbide is to make raw material with quartz sand and petroleum coke or high-quality anthracite, anti-through high temperature carbon thermal reduction It should generate, while synthesizing silicon carbide product, also to release largely with CO gas as main component.But in recent years due to Climate change caused by environmental pollution has become the problem of mankind must not be not concerned with, in response to the political affairs of national energy-saving environmental protection Plan, many enterprises transformation thoughts, adjustment idea in management, from high energy consumption, high pollution, maximum discharge rough formula management style to section It can, lower consumption, the transformation of the production method of environmental protection, and chevron furnace is gradually eliminated due to its high energy consumption, high pollution, for CO is collected, and bonnet collection can be used, and air is full of there are very large space between reactant and bonnet, in this segment space, Oxygen in air is mixed with CO, it is easy to fryer accident occur.

Summary of the invention

In view of this, in view of the above deficiencies, it is necessary to propose that one kind is used to produce silicon carbide, and can effectively collect CO gas Environmental protection and energy saving chevron silicon carbide smelting device for recovering tail gas without spraying furnace safety accident.

It there is a need to propose a kind of environmental protection and energy saving chevron silicon carbide smelting method for recovering tail gas.

A kind of environmental protection and energy saving chevron silicon carbide smelting device for recovering tail gas, there are two headwall, the outsides of headwall for device tool Airtight layer is posted in end face, and at end, coping is provided with the first seal groove, is being equipped with direct current just in the middle part of a headwall Extremely, direct current negative pole end is installed in the middle part of another headwall, is connected with reactant between two headwalls, reactant at Linear type is U-shaped, and reactant includes furnace core, reaction material, insulation material from the inside to the outside, and furnace core is located at reactant center, the furnace core It is paved by powdered graphite, one end of furnace core is electrically connected with the direct current positive terminal on headwall, the other end of furnace core and another Direct current negative pole end on one headwall is electrically connected, and the surrounding of furnace core is enclosed with reaction material, and reaction material is centered on furnace core, edge Furnace core cross-wise direction extends around, is enclosed with insulation material on the outside of reaction material, and insulation material is cut centered on reaction material along reaction material Face direction extends around, and the outer surface of insulation material forms chevron edge, and the end face of two headwalls is also provided with into be cut with reactant The identical chevron in face is additionally provided with gas collecting apparatus in the two sides of insulation material, and gas collecting apparatus includes gas collection wall, gas-collecting branch pipe, gas collection Supervisor, negative-pressure air fan, gas collection wall are set to reactant two sides along reactant length direction, and the height of gas collection wall is lower than reactant Highly, have in gas collection coping and the second seal groove be set along gas collection wall length direction, the both ends of the second seal groove respectively at The first seal groove connection on two headwalls is covered with airtight film, the front and back two of airtight film in reaction external surface The first seal groove of end embedment, the left and right ends of airtight film are embedded to the second seal groove, two gas collection walls, two headwalls, impermeable Gas film together forms the obturator without cavity, and the reactant is included in enclosure interior, during gas collection has within the walls Empty collection chamber, is provided with multiple partitions along its length in collection chamber, collection chamber is separated into multiple mutually indepedent Air collecting chamber, multiple air holes are equipped on the side wall that gas collection wall is contacted with reactant, one end of air hole is connected to air collecting chamber, The other end of air hole is connected to enclosure interior, also posts air-permeable layer on the side wall that gas collection wall is contacted with reactant, with logical The end face that air-permeable layer lid closes air hole is crossed, multiple gas-collecting branch pipes, gas collection are provided on the side wall that gas collection wall is contacted with reactant One end of branch pipe is connected to air collecting chamber, and one end of gas-collecting branch pipe is connected to gas collecting main pipe, closed at one end, the gas collection master of gas collecting main pipe Another end opening of pipe, the open end of gas collecting main pipe are connect with negative-pressure air fan, are additionally provided with nitrogen charging device in the two sides of insulation material, The nitrogen charging device has multiple nitrogen efferent ducts, at least one nitrogen efferent duct is accordingly connected to an air collecting chamber.

Preferably, the section of the furnace core is rectangle, and the reaction material includes a material, two material, three material, four Material, for a material position in the lower section of furnace core, the section of a material be the trapezoidal of handstand, and two material positions are in the top of furnace core, two Portion expects that section is rectangle, and three material are two groups, and positioned at the two sides of furnace core, the section of three material is rectangle, the height etc. of three material In the sum of two material and furnace core height, the top that four material positions are expected in two, four material are trapezoidal.

Preferably, a material is made of the reaction material of four layers of different-thickness from top to bottom, and four material are from top to bottom by difference Two layers of reaction material of thickness is constituted, the lower layers of four material be it is trapezoidal, the upper layers covering of four material on the lower layers of four material, four The section on the upper layer of portion's material is at umbrella shape.

A kind of environmental protection and energy saving chevron silicon carbide smelting method for recovering tail gas, comprising the following steps:

Step 1: tile first layer insulation material on the ground in the region in two headwalls and two gas collection walled cities, first It is the first trapezoidal cavity that stands upside down that the middle part of layer heat preservation, which reserves section, is successively spread from bottom to top in the first cavity into four layers one Material；

Two sections material baffle identical with three material sections: being respectively placed in the left and right sides of a material top by step 2, and It is successively spread from bottom to top in gap between two material baffles into graphite powder, two material, the graphite powder forms furnace core, then will Direct current positive terminal, direct current negative pole end are connect with furnace core both ends respectively, and are laid with the second layer in the opposite two sides of material baffle and are protected Temperature material；

Step 3: taking down two material baffles, and three material are respectively charged by two the second cavitys that two material baffles are formed after emptying In two the second cavitys；

Step 4: it is successively laid with two layers of four material from bottom to top in the top of three material, two material, is spread in the outer surface that four are expected If third layer insulation material；

Step 5: being laid with airtight film, the front and rear edges of airtight film is buried the first seal groove of people, by airtight film Left and right edges bury the second seal groove of people；

Step 6: gas-collecting branch pipe is connect with gas collecting main pipe, and gas collecting main pipe is connect with negative-pressure air fan.

The present invention has been embedded to first using airtight film, front and rear edges, the left and right edges of airtight film are covered respectively Seal groove, the second seal groove solve the problems, such as sealing, guarantee that the air content of gas recovery in reactant is less than safety valve Value, is evacuated using built-in gas collection wall, and nitrogen charging device carries out nitrogen displacement to the collection chamber that gas collection is arranged within the walls, can be enhanced Reactant exhaust, but can solve external pumping need to be arranged exhaust passage bring carry secretly a certain amount of air enter in CO gas and The drawbacks of causing fryer, ensure that the abundant exhaust of reaction process, solve asking for the chevron furnace getter hardly possible of long-standing problem industry Topic.

Detailed description of the invention

Fig. 1 is the sectional view of the environmental protection and energy saving chevron silicon carbide smelting device for recovering tail gas.

Fig. 2 is a kind of structural schematic diagram of the environmental protection and energy saving chevron silicon carbide smelting device for recovering tail gas.

Fig. 3 is another structural schematic diagram of the environmental protection and energy saving chevron silicon carbide smelting device for recovering tail gas.

Fig. 4 is the partial enlarged view of environmental protection and energy saving chevron silicon carbide smelting device for recovering tail gas described in Fig. 1.

In figure: headwall 10, the first seal groove 11, direct current positive terminal 12, direct current negative pole end 13, reactant 20, furnace core 21,221, two material 222, three material 223, four material 224, insulation material 23, gas collecting apparatus 30, gas collection of reaction material 22, one material Wall 31, the second seal groove 311, collection chamber 312, air hole 313, gas-collecting branch pipe 32, airtight film 40, nitrogen charging device 50.

Specific embodiment

In order to illustrate the technical solution of the embodiments of the present invention more clearly, below will be to needed in the embodiment attached Figure is briefly described, it should be apparent that, drawings in the following description are some embodiments of the invention, common for this field For technical staff, without creative efforts, it is also possible to obtain other drawings based on these drawings.

Referring to Fig. 1 to Fig. 4, the embodiment of the invention provides a kind of environmental protection and energy saving chevron silicon carbide smelting tail gas recycle dresses It sets, for device tool there are two headwall 10, the end face outside of headwall 10 posts airtight layer, and the top of headwall 10 is provided with the One seal groove 11 is equipped with direct current positive terminal 12 in the middle part of a headwall 10, is equipped with directly at the middle part of another headwall 10 Galvanic electricity negative pole end 13, is connected with reactant 20 between two headwalls 10, and reactant 20 is in line type or U-shaped, reactant 20 by Interior to outer includes furnace core 21, reaction material 22, insulation material 23, and furnace core 21 is located at 20 center of reactant, and furnace core 21 is spread by powdered graphite Be electrically connected at, one end of furnace core 21 and the direct current positive terminal 12 on a headwall 10, the other end of furnace core 21 and another Direct current negative pole end 13 on headwall 10 is electrically connected, and the surrounding of furnace core 21 is enclosed with reaction material 22, and reaction material 22 is with furnace core 21 Centered on, extend around along 21 cross-wise direction of furnace core, insulation material 23 is enclosed on the outside of reaction material 22, insulation material 23 is with reaction material Centered on 22, extend around along 22 cross-wise direction of reaction material, the outer surface of insulation material 23 forms chevron edge, two headwalls 10 End face be also provided with into chevron identical with 20 section of reactant, be additionally provided with gas collecting apparatus 30 in the two sides of insulation material 23, collect Device of air 30 includes gas collection wall 31, gas-collecting branch pipe 32, gas collecting main pipe, negative-pressure air fan, and gas collection wall 31 is along 20 length side of reactant To 20 two sides of reactant are set to, the height of gas collection wall 31 has at the top of gas collection wall 31 along collection lower than 20 height of reactant The second seal groove 311 is arranged in 31 length direction of gas wall, and the both ends of the second seal groove 311 are close respectively at first on two headwalls 10 Sealing groove 11 is connected to, and is covered with airtight film 40, the rear and front end embedment first of airtight film 40 in 20 outer surface of reactant Seal groove 11, the left and right ends of airtight film 40 are embedded to the second seal groove 311, two gas collection walls, 31, two headwalls 10, impermeable Gas film 40 together forms the obturator without cavity, and reactant 20 is included in enclosure interior, has in gas collection wall 31 Hollow collection chamber 312, is provided with multiple partitions along its length in collection chamber 312, collection chamber 312 is separated into more A mutually independent air collecting chamber is equipped with multiple air holes 313, air hole on the side wall that gas collection wall 31 is contacted with reactant 20 313 one end is connected to air collecting chamber, and the other end of air hole 313 is connected to enclosure interior, in gas collection wall 31 and reactant 20 Air-permeable layer is also posted on the side wall of contact, to close the end face of air hole 313 by air-permeable layer lid, in gas collection wall 31 and reactant 20 Multiple gas-collecting branch pipes 32 are provided on the side wall of contact, one end of gas-collecting branch pipe 32 is connected to air collecting chamber, and the one of gas-collecting branch pipe 32 End be connected to gas collecting main pipe, closed at one end, another end opening of gas collecting main pipe of gas collecting main pipe, the open end of gas collecting main pipe with bear Pressure fan connection is additionally provided with nitrogen charging device 50 in the two sides of insulation material 23, and nitrogen charging device 50 has multiple nitrogen efferent ducts, until A few nitrogen efferent duct is accordingly connected to an air collecting chamber.

The reaction material 22 that inferior quality can be used in above-mentioned insulation material 23 is recycled, and avoids the generation of a large amount of weary material, no Breathable films 40 can use plastic film or canvas.

In the present invention, 20 length of reactant is in 150m or so, therefore, opposite for industrializing the channel furnace of synthesizing silicon carbide Side wall for, the sealing of headwall 10 be it is enforceable, due to being provided with the headwall 10 of airtight layer, gas collection wall 31, being covered in The airtight film 40 on 20 surface of reactant together forms an obturator of the inside without cavity, the front and back of airtight film 40 Edge, left and right edges have been embedded to the first seal groove 11, the second seal groove 311 respectively, and it is good to ensure that apparatus of the present invention have Sealing performance, and for groove profile furnace, it is provided with side wall in the furnace body two sides along furnace body length direction, even if using airtight thin Film 40 guarantees to seal, and since side wall is very high, also will form between side wall and airtight film 40 very big containing a large amount of Spray furnace or fryer accident still inevitably occur for the cavity of air.

The chevron furnace of industrialization synthesizing silicon carbide does not have headwall 10, without side wall yet, only a material for piling small chevron Heap, good permeability are relatively suitble to synthesizing silicon carbide, how to be re-used for the advantage of its good permeability producing silicon carbide, and CO gas can be recycled simultaneously, is the main technical problem to be solved in the present invention without fryer accident.

31 side of gas collection wall, which is built in obturator, to be evacuated, and is avoided by the way of bonnet, need bonnet with Exhaust passage is reserved between reactant 20, exhaust passage has included air, and pump-line and the exhaust that these contain air are logical Road connection, so that air is entrained into the CO gas of collection together and occurs to spray furnace or fryer safety accident.

Based on the above issues, the present invention is also provided with nitrogen charging device 50, every time before production, by nitrogen charging device 50 by nitrogen It is passed through air collecting chamber, then is extracted out the gas in air collecting chamber by negative-pressure air fan, the nitrogen displacement of air collecting chamber is realized, avoids collection Air in air cavity in process of production, is extracted out by gas collecting apparatus 30 1 and fryer accident occurs.Moreover, time swap is longer In the case where, moreover it is possible to by air displacement in reactant 20, the collection chamber 312 in gas collection wall 31 forms the controllable row of atmosphere Gas channel is more advantageous to the exhaust of reactant 20,

It is well known that the reaction that synthesizing silicon carbide is an exhaust is as above covered with airtight film in 20 outer surface of reactant 40, the progress of reaction will be unfavorable for, moreover, not considering mostly to collect CO gas both at home and abroad using chevron furnace synthesizing silicon carbide, or only Discharge is only concentrated, above-mentioned cognition is based on, few people use chevron furnace and collect CO gas with the means of closed furnace body, and And in industry it is well recognized that, chevron furnace can use bonnet getter, but due to inevitably occurring to spray furnace and fryer accident, the day of one's doom Its popularization is made.

In short, solution furnace sealing and specific exhaust mode are to utilize chevron furnace synthesizing silicon carbide, and effectively return simultaneously Receiving CO gas is the key that problem.

The present invention is embedded to respectively using airtight film 40, front and rear edges, the left and right edges of airtight film 40 are covered First seal groove 11, the second seal groove 311 solve the problems, such as sealing, guarantee the air content of gas recovery in reactant 20 Less than safe threshold, be evacuated using built-in gas collection wall 31, nitrogen charging device 50 to the collection chamber 312 being arranged in gas collection wall 31 into Row nitrogen displacement, can intensified response body 20 exhaust and it is external pumping need to be arranged exhaust passage bring entrainment one The drawbacks of certain amount of air enters in CO gas and causes fryer, it ensure that the abundant exhaust of reaction process, solve long-standing problem The problem of the chevron furnace getter hardly possible of industry.

Referring to Fig. 1, further, the section of furnace core 21 is rectangle, and reaction material 22 includes 221, two material 222, three of a material Portion expect 223, four material 224, one material 221 be located at furnace core 21 lower sections, one material 221 section be handstand it is trapezoidal, two Material 222 is located at the tops of furnace core 21, and two 222 sections of material are rectangle, and three material 223 are two groups, positioned at the two sides of furnace core 21, three The section of portion's material 223 is rectangle, and the height of three material 223 is equal to the sum of two material 222 and 21 height of furnace core, and four are expected 224 In the top of two material 222, four material 224 are trapezoidal.

Referring to Fig. 1, further, a material 221 is made of the reaction material 22 of four layers of different-thickness from top to bottom, four material 224 are made of two layers of reaction material 22 of different-thickness from top to bottom, and the lower layer of four material 224 is trapezoidal, the upper layer of four material 224 Covering is on the lower layer of four material 224, and the section on the upper layer of four material 224 is at umbrella shape.

Above-mentioned distributing mode is to be based on facilitating feasible brickwork and designing, in actual production, it is only necessary to which an overhead traveling crane is just It can complete brickwork.

The present invention also provides a kind of environmental protection and energy saving chevron silicon carbide smelting method for recovering tail gas, comprising the following steps:

Step 1: tile first layer insulation material 23 on the ground in the region that two headwalls 10 and two gas collection walls 31 are encircled a city, Reserving section at the middle part of first layer heat preservation is the first trapezoidal cavity that stands upside down, and is successively spread into four from bottom to top in the first cavity One material 221 of layer；

Step 2: two sections material baffle identical with three 223 sections of material is respectively placed in the left and right two of 221 top of a material Side, and successively spread from bottom to top in the gap between two material baffles into graphite powder, two material 222, graphite powder forms furnace core 21, then direct current positive terminal 12, direct current negative pole end 13 are connect with 21 both ends of furnace core respectively, and the two sides opposite in material baffle It is laid with second layer insulation material 23；

Step 3: two material baffles, two the second cavitys that two material baffles are formed after emptying, by three 223 difference of material are taken down It is fitted into two the second cavitys；

Step 4: expect that the top of 223, two material 222 is successively laid with two layers of four material 224 from bottom to top at three, expect at four 224 outer surface is laid with third layer insulation material 23；

Step 5: being laid with airtight film 40, and the front and rear edges of airtight film 40 is buried the first seal groove of people 11, will be airtight The left and right edges of film 40 bury the second seal groove of people 311；

Step 6: gas-collecting branch pipe 32 is connect with gas collecting main pipe, and gas collecting main pipe is connect with negative-pressure air fan.

Using the reaction process of apparatus of the present invention production silicon carbide: powering on, furnace core 21 heats one and expects 221, two 222, three, material, 223, four, material material 224, centered on furnace core 21,221, two, material, 222, three, material, 223, four material of material 224 silicon carbide of step-reaction formation from inside to outside crystallize cylinder, react the gas of generation between reaction material 22 and insulation material 23 Hole diffuses out, and then by passing sequentially through air-permeable layer, air hole 313, air collecting chamber, gas-collecting branch pipe 32, gas collecting main pipe is finally received Collection.

Insulating layer can also be used normal reaction material 22, the position of insulating layer, since reaction temperature is not achieved in temperature, The reaction terminating of this position, the reaction material 22 as insulating layer are recycled.

The steps in the embodiment of the present invention can be sequentially adjusted, merged and deleted according to actual needs.

Module or unit in the device of that embodiment of the invention can be combined, divided and deleted according to actual needs.

The above disclosure is only the preferred embodiments of the present invention, cannot limit the right model of the present invention with this certainly It encloses, those skilled in the art can understand all or part of the processes for realizing the above embodiment, and wants according to right of the present invention Made equivalent variations is sought, is still belonged to the scope covered by the invention.

Claims

1. a kind of environmental protection and energy saving chevron silicon carbide smelting device for recovering tail gas, it is characterised in that: there are two headwall, ends for device tool The end face outside of wall posts airtight layer, and at end, coping is provided with the first seal groove, is equipped in the middle part of a headwall Direct current positive terminal is equipped with direct current negative pole end in the middle part of another headwall, is connected with reactant between two headwalls, Reactant is in line type or U-shaped, and reactant includes furnace core, reaction material, insulation material from the inside to the outside, and furnace core is located at reactant center, The furnace core is paved by powdered graphite, and one end of furnace core is electrically connected with the direct current positive terminal on headwall, furnace core it is another Direct current negative pole end on one end and another headwall is electrically connected, and the surrounding of furnace core is enclosed with reaction material, and reaction material is with furnace core Centered on, extend around along furnace core cross-wise direction, be enclosed with insulation material on the outside of reaction material, insulation material centered on reaction material, Extend around along reaction material cross-wise direction, the outer surface of insulation material forms chevron edge, and the end face of two headwalls is also provided with into With react the identical chevron of body section, be additionally provided with gas collecting apparatus in the two sides of insulation material, gas collecting apparatus includes gas collection wall, gas collection Branch pipe, gas collecting main pipe, negative-pressure air fan, gas collection wall are set to reactant two sides, the height of gas collection wall along reactant length direction Lower than reactant height, has in gas collection coping and the second seal groove is set along gas collection wall length direction, the second seal groove Both ends are covered with airtight film respectively at the first seal groove connection on two headwalls, in reaction external surface, airtight thin The rear and front end of film is embedded to the first seal groove, and the left and right ends of airtight film are embedded to the second seal groove, two gas collection walls, two Headwall, airtight film together form the obturator without cavity, and the reactant is included in enclosure interior, gas collection wall It is interior that there is hollow collection chamber, it is provided with multiple partitions along its length in collection chamber, collection chamber is separated into multiple Mutually independent air collecting chamber is equipped with multiple air holes, one end of air hole and collection on the side wall that gas collection wall is contacted with reactant Air cavity connection, the other end of air hole are connected to enclosure interior, also post on the side wall that gas collection wall is contacted with reactant Gas-bearing formation is provided with multiple gas collections to close the end face of air hole by air-permeable layer lid on the side wall that gas collection wall is contacted with reactant One end of branch pipe, gas-collecting branch pipe is connected to air collecting chamber, and one end of gas-collecting branch pipe is connected to gas collecting main pipe, an end seal of gas collecting main pipe It closes, another end opening of gas collecting main pipe, the open end of gas collecting main pipe is connect with negative-pressure air fan, is additionally provided in the two sides of insulation material Nitrogen charging device, the nitrogen charging device have multiple nitrogen efferent ducts, at least one nitrogen efferent duct accordingly connects with an air collecting chamber It is logical.

2. environmental protection and energy saving chevron silicon carbide smelting device for recovering tail gas as described in claim 1, it is characterised in that: the furnace core Section be rectangle, the reaction material include one material, two material, three material, four material, a material position is under furnace core Side, the section of a material are the trapezoidal of handstand, and for two material positions in the top of furnace core, two material sections are rectangle, and three material are two Group, positioned at the two sides of furnace core, the sections of three material are rectangle, and the height of three material are equal to the sum of two material and furnace core height, four The top that portion's material position is expected in two, four material are trapezoidal.

3. environmental protection and energy saving chevron silicon carbide smelting device for recovering tail gas as claimed in claim 2, it is characterised in that: a material is certainly It being made of under above the reaction material of four layers of different-thickness, four material are made of two layers of reaction material of different-thickness from top to bottom, and four Portion material lower layer be it is trapezoidal, four material upper layers covering with four material lower layers on, four material upper layer section at umbrella shape.

4. a kind of environmental protection and energy saving chevron silicon carbide smelting method for recovering tail gas, which comprises the following steps: