CN219942385U - Ash removal system of industrial silicon stove high temperature flue gas dirt nitre integration desorption equipment - Google Patents
Ash removal system of industrial silicon stove high temperature flue gas dirt nitre integration desorption equipment Download PDFInfo
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- CN219942385U CN219942385U CN202321185398.1U CN202321185398U CN219942385U CN 219942385 U CN219942385 U CN 219942385U CN 202321185398 U CN202321185398 U CN 202321185398U CN 219942385 U CN219942385 U CN 219942385U
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- dust
- flue gas
- ash
- temperature flue
- valve
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 71
- 239000003546 flue gas Substances 0.000 title claims abstract description 71
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 title claims abstract description 21
- 229910052710 silicon Inorganic materials 0.000 title claims abstract description 20
- 239000010703 silicon Substances 0.000 title claims abstract description 20
- 238000003795 desorption Methods 0.000 title claims description 8
- 230000010354 integration Effects 0.000 title claims description 4
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 title claims description 4
- 239000000428 dust Substances 0.000 claims abstract description 65
- 229910002651 NO3 Inorganic materials 0.000 claims abstract description 32
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 claims abstract description 32
- 238000004062 sedimentation Methods 0.000 claims abstract description 29
- 238000006243 chemical reaction Methods 0.000 claims abstract description 18
- 239000007789 gas Substances 0.000 claims abstract description 13
- 238000000605 extraction Methods 0.000 claims abstract description 9
- 238000002347 injection Methods 0.000 claims abstract description 6
- 239000007924 injection Substances 0.000 claims abstract description 6
- 239000003500 flue dust Substances 0.000 claims description 12
- 239000002184 metal Substances 0.000 claims description 5
- 239000003054 catalyst Substances 0.000 claims description 4
- 238000007664 blowing Methods 0.000 abstract description 14
- 230000000694 effects Effects 0.000 abstract description 3
- 230000009471 action Effects 0.000 description 6
- 239000002245 particle Substances 0.000 description 6
- 238000004140 cleaning Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000011882 ultra-fine particle Substances 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006479 redox reaction Methods 0.000 description 1
- 229910021487 silica fume Inorganic materials 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
- 238000013022 venting Methods 0.000 description 1
Classifications
-
- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
- Y02A50/2351—Atmospheric particulate matter [PM], e.g. carbon smoke microparticles, smog, aerosol particles, dust
Abstract
The utility model discloses a dust removing system of high-temperature flue gas dust and nitrate integrated removing equipment of an industrial silicon furnace, which comprises high-temperature flue gas dust and nitrate integrated removing equipment, a pulse injection dust removing system and an auxiliary sedimentation system, wherein the high-temperature flue gas dust and nitrate integrated removing equipment comprises a bag region, an SCR reaction region, a gas purifying chamber, a dust hopper, a gas inlet, a gas outlet, a dust conveying port and a gas extracting port, and flue gas enters from the gas inlet and passes through the bag region to remove dust in the flue gas; the flue gas after dust removal enters the SCR reaction zone, NOx in the flue gas is removed and then is discharged from an exhaust port of the clean gas chamber, and an extraction port is connected with an auxiliary sedimentation system. The pulse blowing ash removal system is combined with the auxiliary sedimentation system, so that the dust sedimentation time is effectively reduced on the premise of ensuring a good ash removal effect, the efficient and stable operation of equipment is ensured, the ash removal capability is strong, the sedimentation time is short, and the problem of floating dust in a bin can be effectively solved.
Description
Technical Field
The utility model relates to the field of flue gas dust removal and environmental protection, in particular to a dust removal system of an industrial silicon furnace high-temperature flue gas dust and nitrate integrated removal device.
Background
With the improvement of the standard of living, people put forward higher requirements on the quality of the atmospheric environment, and simultaneously, the country is continuously improving the requirements of industrial emission. The flue gas discharged by the industrial silicon in the smelting process can cause serious pollution, and the realization of effective treatment of the flue gas of the industrial silicon furnace is particularly important.
About 90% of the flue gas emissions of the industrial silicon furnace are SiO with the particle size below 1 mu m 2 Ultrafine particles, micro-silica dust, are typical of PM2.5 ultrafine particles. The silicon dust particles are extremely fine, the specific surface area is large, and the particle size is about 20m 2 /g~30m 2 The volume per gram is relatively light and is only 200kg/m 3 . Meanwhile, the flue gas of the silicon furnace contains pollutants such as NOx.
Aiming at the flue gas characteristics of an industrial silicon furnace, the adoption of high-temperature flue gas dust and nitrate integrated removal equipment is an effective measure. Because the dust is fine and light, the ash removal and dust sedimentation are important. Therefore, an effective ash removal system is needed to effectively solve the ash removal problem of the filter bag and ensure long-term stable operation of the equipment.
The existing bag type dust remover applied to the flue gas of the industrial silicon furnace is generally a back-blowing bag type dust remover, and adopts a back-suction fan or the front negative pressure of a draught fan to remove dust, which belongs to weak-force dust removal and has poor dust removal effect.
Disclosure of Invention
In order to solve the technical problems, the utility model designs the ash removal system of the high-temperature flue gas and dust and nitrate integrated removal equipment of the industrial silicon furnace, which effectively solves the ash removal problem of a metal filter bag of the high-temperature flue gas and dust and nitrate integrated removal equipment, ensures the high-efficiency and stable operation of the dust and nitrate integrated removal equipment and achieves the purpose of flue gas denitration and dust removal.
The utility model adopts the following technical scheme:
the ash removal system comprises high-temperature flue gas dust and nitrate integrated removal equipment, a pulse injection ash removal system and an auxiliary sedimentation system, wherein the high-temperature flue gas dust and nitrate integrated removal equipment comprises a bag region, an SCR reaction region, an air purifying chamber, an ash bucket, an air inlet, an air outlet, an ash conveying port and an extraction port, and flue gas enters the bag region from the air inlet to remove dust in the flue gas; the flue gas after the desorption dust gets into SCR reaction zone, discharge from the gas vent of clean air chamber after the NOx in the desorption flue gas, auxiliary sedimentation system is connected to the extraction opening, auxiliary sedimentation system includes tuber pipe, ooff valve and suction fan, the air inlet of tuber pipe intercommunication high temperature flue gas dust nitre integration desorption equipment or front end cyclone's front flue, ooff valve and suction fan are installed on the tuber pipe, pulse jetting ash removal system includes compressed air master valve, the relief pressure valve, the steam drum, pulse valve and pipeline, the air master valve, the relief pressure valve, the steam drum, the pulse valve loops through the pipeline intercommunication, the pipeline export is just to the sack. When the upper and lower differential pressure of the bag area reaches a set value, the pulse jetting ash removal system alternately removes ash from each chamber, and after the ash removal is finished, the auxiliary sedimentation system pumps away floating ash in the chamber by changing the airflow direction of the chamber, so that the purpose of rapid sedimentation is realized.
Preferably, the pulse blowing ash removal system further comprises a stop valve and a pressure gauge, and the pressure gauge and the stop valve are sequentially communicated to the steam bag through pipelines.
Preferably, the pulse blowing ash removal system further comprises an emptying valve, the steam drum is communicated with the emptying valve through a pipeline, and the emptying valve is used for emptying the outside.
Preferably, the bag area comprises a flower plate, a metal filter bag and a baffle plate.
Preferably, the high-temperature flue gas dust and nitrate integrated removal device comprises a plurality of chambers, wherein a bag area, an SCR reaction area, a gas purifying chamber and an ash bucket are arranged in each chamber, and an air inlet, an air outlet, an ash conveying port and an air extracting port are arranged outside each chamber.
Preferably, the SCR reaction zone includes a support beam and a catalyst module.
Preferably, the bottom of the ash bucket is communicated with an ash warehouse through an ash conveying port.
The beneficial effects of the utility model are as follows: (1) The pulse blowing ash removal system is combined with the auxiliary sedimentation system, so that on the premise of ensuring a good ash removal effect, the dust sedimentation time is effectively reduced, the efficient and stable operation of equipment is ensured, the supplementary functions are complemented, the ash removal capability is strong, the sedimentation time is short, and the bin floating dust problem can be effectively solved; (2) The parallel devices can share one auxiliary sedimentation system, and the auxiliary sedimentation system operates in an interlocking manner according to the ash removal action of the bin, so that the operation is simple and automatic.
Drawings
FIG. 1 is a schematic view of a construction of the present utility model;
FIG. 2 is a schematic structural view of the high-temperature flue gas dust and nitrate integrated removal device;
FIG. 3 is a schematic diagram of a pulse blowing ash removal system according to the present utility model;
FIG. 4 is a schematic diagram of an auxiliary sedimentation system according to the present utility model;
in the figure: 1. high-temperature flue gas dust and nitrate integrated removal equipment, 2, pulse injection ash removal system, 3, auxiliary sedimentation system, 1.1, bag area, 1.2, SCR reaction area, 1.3, air purifying chamber, 1.4, ash bucket, 1.5, air inlet, 1.6, air outlet, 1.7, ash conveying port, 1.8, extraction port, 2.1, compressed air main valve, 2.2, pressure reducing valve, 2.3, emptying valve, 2.4, steam drum, 2.5, stop valve, 2.6, pressure gauge, 2.7, pulse valve, 3.1, switching valve, 3.2, suction fan, 3.3, bin, 3.4 and cyclone dust collector.
Detailed Description
The technical scheme of the utility model is further specifically described by the following specific embodiments with reference to the accompanying drawings:
examples: as shown in fig. 1, the ash removal system of the high-temperature flue gas dust and nitrate integrated removal device of the industrial silicon furnace comprises high-temperature flue gas dust and nitrate integrated removal device 1, a pulse blowing ash removal system 2 and an auxiliary sedimentation system 3. The flue gas passes through a bag region of the high-temperature flue gas dust and nitrate integrated removal device 1 to remove dust in the flue gas; the flue gas after dust removal enters the SCR reaction zone of the high-temperature flue gas, dust and nitrate integrated removal equipment 1, and NOx in the flue gas is removed and then discharged from the clean gas chamber of the high-temperature flue gas, dust and nitrate integrated removal equipment 1. When the upper and lower differential pressure of the bag area reaches a set value, the pulse blowing ash removal system 2 carries out ash removal on each chamber in turn, and after the ash removal of the chamber is finished, the auxiliary sedimentation system 3 pumps away floating ash in the chamber by changing the airflow direction of the chamber, so that the purpose of rapid sedimentation is realized.
The high-temperature flue gas dust and nitrate integrated removal equipment 1 is composed of a plurality of parts, and as shown in fig. 2, comprises a bag area 1.1, an SCR reaction area 1.2, a clean air chamber 1.3, an ash bucket 1.4, an air inlet 1.5, an air outlet 1.6, an ash conveying port 1.7 and an air extracting port 1.8. The bag area 1.1 is composed of a pattern plate, a metal filter bag, a baffle plate and the like, and is divided into a plurality of chambers, and the main function of the chambers is to remove dust in flue gas. The SCR reaction zone 1.2 consists of a supporting beam, a catalyst module and the like, and has the main function of removing NOx pollutants in the flue gas. The ash bucket 1.4 is used for storing dust which is settled by ash removal. The extraction opening 1.8 is connected with an auxiliary sedimentation system 3. When passing through the bag area 1.1, dust particles in the flue gas are filtered by the metal filter bag and attached to the outer wall to form a dust layer, the dust-removed flue gas passes through the filter bag to enter the SCR reaction area 1.2 for denitration reaction, and the purified flue gas enters the air purifying chamber 1.3 and is then discharged out of the equipment through the air outlet 1.6. The filter bag is subjected to ash removal through differential pressure control, a dust layer separated from the outer wall of the filter bag falls into an ash bucket 1.4, and accumulated ash in the ash bucket is periodically conveyed to an ash warehouse through an ash conveying port 1.7 through material level control.
As shown in fig. 3, the pulse blowing ash cleaning system 2 mainly has the function of removing dust particles attached to a filter bag, and consists of a compressed air main valve 2.1, a pressure reducing valve 2.2, a blow-off valve 2.3, a steam drum 2.4, a stop valve 2.5, a pressure gauge 2.6, a pulse valve 2.7 and a pipeline. The main function of the compressed air main valve 2.1 is to control the input and the cut-off of the compressed air of the pulse blowing ash cleaning system. The pressure reducing valve 2.2 only has to reduce the compressed air pressure so that the compressed air pressure meets the blowing requirement. The venting valve 2.3 can release pressure and vent the drum. The steam drum 2.4 stores a certain amount of compressed air, so as to meet the use requirement of the system. The pressure gauge 2.6 can effectively indicate the pressure of the compressed air in the drum. The pulse valve 2.7 is used for gas blowing and filter bag ash removal.
As shown in fig. 4, the auxiliary sedimentation system 3 consists of an air pipe, a switch valve 3.1 and a suction fan 3.2, and after pulse ash removal, the flue gas containing a large amount of floating dust in the bin chamber is pumped out from the bin chamber 3.3 and is sent back to an equipment inlet flue or a front flue of the front cyclone dust collector 3.4, so that the floating dust in the bin chamber is prevented from being rapidly attached to a filter bag, and the resistance of the bag region is prevented from being reduced to a parameter of normal operation. The on-off valve 3.1 controls the on/off state of the on-off valve according to the ash cleaning action of the bin 3.3, and the channel between the bin and the auxiliary sedimentation system is communicated/cut off. The suction fan 3.2 mainly provides suction power for the auxiliary sedimentation system.
When the ash removal system of the high-temperature flue gas and dust and nitrate integrated removal equipment of the industrial silicon furnace is used, high-temperature flue gas enters the high-temperature flue gas and dust and nitrate integrated removal equipment through the air inlet, firstly, the high-temperature flue gas enters the flue gas and dust and nitrate integrated removal equipment and uniformly diffuses into the bin under the action of the air flow uniform distribution device, passes through the filter bag from the outer side of the filter bag, and enters the SCR reaction zone from the inner side of the filter bag, wherein dust particles carried in the flue gas are attached to the attached outer wall under the filtering action of the filter bag, so that a dust layer is formed. After the dust-removed flue gas enters the SCR reaction zone, under the action of a catalyst, NOx and NH in the flue gas 3 Oxidation-reduction reaction occurs to produce N 2 . And the purified flue gas enters the air purifying chamber and finally is discharged out of the equipment from the exhaust port.
When the dust layer on the outer wall of the filter bag is thickened, the resistance of the filter bag is correspondingly increased, and after the specified value is reached, the chambers are subjected to ash removal by pulse blowing ash removal system 2 in turn. The air outlet of the chamber is closed at first, so that the filter bag chamber is temporarily in a static state without circulating air flow, after the blowing is completed, a switch valve of the auxiliary sedimentation system corresponding to the chamber is opened, under the action of a fan, the air flow in the chamber flows to an extraction opening of an ash bucket, the air flow carries floating dust and is conveyed to a front-end flue of equipment or a front-end flue of a cyclone dust collector by the fan, then the switch valve is closed, and the air outlet of the chamber is opened to complete the whole process of dust removal of the filter bag. The dust in the falling ash bucket is periodically conveyed to an ash warehouse according to the material level.
The above-described embodiment is only a preferred embodiment of the present utility model, and is not limited in any way, and other variations and modifications may be made without departing from the technical aspects set forth in the claims.
Claims (7)
1. The ash removal system of the high-temperature flue gas dust and nitrate integrated removal equipment of the industrial silicon furnace is characterized by comprising the high-temperature flue gas dust and nitrate integrated removal equipment, a pulse injection ash removal system and an auxiliary sedimentation system, wherein the high-temperature flue gas dust and nitrate integrated removal equipment comprises a bag area, an SCR reaction area, a gas purifying chamber, an ash bucket, an air inlet, an air outlet, an ash conveying port and an air extraction port, and flue gas enters from the air inlet and passes through the bag area to remove dust in the flue gas; the flue gas after the desorption dust gets into SCR reaction zone, discharge from the gas vent of clean air chamber after the NOx in the desorption flue gas, auxiliary sedimentation system is connected to the extraction opening, auxiliary sedimentation system includes tuber pipe, ooff valve and suction fan, the air inlet of tuber pipe intercommunication high temperature flue gas dust nitre integration desorption equipment or front end cyclone's front flue, ooff valve and suction fan are installed on the tuber pipe, pulse jetting ash removal system includes compressed air master valve, the relief pressure valve, the steam drum, pulse valve and pipeline, the air master valve, the relief pressure valve, the steam drum, the pulse valve loops through the pipeline intercommunication, the pipeline export is just to the sack.
2. The ash removal system of the integrated high-temperature flue gas dust and nitrate removal device for the industrial silicon furnace according to claim 1, wherein the pulse injection ash removal system further comprises a stop valve and a pressure gauge, and the pressure gauge and the stop valve are sequentially communicated to a steam ladle through pipelines.
3. The ash removal system of the integrated high-temperature flue gas dust and nitrate removal device for the industrial silicon furnace according to claim 1, wherein the pulse injection ash removal system further comprises an air release valve, the steam drum is communicated with the air release valve through a pipeline, and the air release valve is externally opened.
4. The ash removal system of the integrated high-temperature flue gas, dust and nitrate removal device for the industrial silicon furnace, which is disclosed in claim 1, is characterized in that the bag area comprises a pattern plate, a metal filter bag and a baffle plate.
5. The ash removal system of the integrated high-temperature flue gas and dust and nitrate removal device for the industrial silicon furnace according to claim 1, wherein the integrated high-temperature flue gas and dust and nitrate removal device comprises a plurality of chambers, a bag area, an SCR reaction area, a gas purifying chamber and an ash bucket are arranged in each chamber, and an air inlet, an air outlet, an ash conveying port and an air extraction port are arranged outside each chamber.
6. The ash removal system of the integrated high-temperature flue gas, dust and nitrate removal device for the industrial silicon furnace, which is disclosed in claim 1, is characterized in that the SCR reaction zone comprises a supporting beam and a catalyst module.
7. The ash removal system of the integrated high-temperature flue gas, dust and nitrate removal device for the industrial silicon furnace, which is disclosed in claim 1, is characterized in that the bottom of the ash bucket is communicated with an ash warehouse through an ash conveying port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321185398.1U CN219942385U (en) | 2023-05-17 | 2023-05-17 | Ash removal system of industrial silicon stove high temperature flue gas dirt nitre integration desorption equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321185398.1U CN219942385U (en) | 2023-05-17 | 2023-05-17 | Ash removal system of industrial silicon stove high temperature flue gas dirt nitre integration desorption equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219942385U true CN219942385U (en) | 2023-11-03 |
Family
ID=88538627
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321185398.1U Active CN219942385U (en) | 2023-05-17 | 2023-05-17 | Ash removal system of industrial silicon stove high temperature flue gas dirt nitre integration desorption equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219942385U (en) |
-
2023
- 2023-05-17 CN CN202321185398.1U patent/CN219942385U/en active Active
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