CN221491936U - Self-circulation air supplementing and back suction ash removing negative pressure large cloth bag dust removing system - Google Patents
Self-circulation air supplementing and back suction ash removing negative pressure large cloth bag dust removing system Download PDFInfo
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- CN221491936U CN221491936U CN202323411024.XU CN202323411024U CN221491936U CN 221491936 U CN221491936 U CN 221491936U CN 202323411024 U CN202323411024 U CN 202323411024U CN 221491936 U CN221491936 U CN 221491936U
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- air
- negative pressure
- cloth bag
- bag dust
- filter
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- 239000000428 dust Substances 0.000 title claims abstract description 60
- 239000004744 fabric Substances 0.000 title claims abstract description 31
- 230000001502 supplementing effect Effects 0.000 title claims abstract description 26
- 239000000779 smoke Substances 0.000 claims abstract description 28
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 19
- 239000003546 flue gas Substances 0.000 claims abstract description 19
- 239000002918 waste heat Substances 0.000 claims abstract description 8
- 238000006477 desulfuration reaction Methods 0.000 claims description 9
- 230000023556 desulfurization Effects 0.000 claims description 9
- 239000011159 matrix material Substances 0.000 claims description 3
- 239000003570 air Substances 0.000 abstract description 73
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 239000012080 ambient air Substances 0.000 abstract description 3
- 230000007246 mechanism Effects 0.000 abstract 1
- 238000010276 construction Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000012065 filter cake Substances 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 239000000047 product Substances 0.000 description 2
- 229910001021 Ferroalloy Inorganic materials 0.000 description 1
- 229910000676 Si alloy Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
The utility model relates to the technical field of submerged arc furnace flue gas negative pressure big cloth bag dust removal, in particular to a self-circulation air supplementing and back suction ash removing negative pressure big cloth bag dust removal system, which comprises a negative pressure big cloth bag dust remover, wherein the negative pressure big cloth bag dust remover consists of a plurality of filter chambers; a plurality of filter bags are arranged in each filter chamber, a first air inlet opening is arranged at the bottom of a filter cavity of each filter bag, the plurality of first air inlet openings are connected with an air inlet channel through an air inlet valve, and the air inlet channels are externally connected with a smoke inlet pipeline; and circulating air supplementing and back-sucking ash removing mechanisms are arranged below the plurality of first air inlet openings. The self-circulation air supplementing and back-suction ash removing negative pressure large cloth bag dust removing system uses the dust removing smoke of the air collecting box as back-suction ash removing and air supplementing air, the temperature of the smoke after air supplementing is basically not reduced, the subsequent denitration efficiency is not influenced, and the steam yield of the waste heat boiler is not reduced. Compared with the air supplementing of the ambient air, the temperature of the flue gas at the outlet of the preheating boiler is about 20 ℃, the steam yield is increased by 10-15%, the production cost is reduced, and the product competitiveness is improved.
Description
Technical Field
The utility model relates to the technical field of submerged arc furnace flue gas negative pressure big cloth bag dust removal, in particular to a self-circulation air supplementing and back suction ash removal negative pressure big cloth bag dust removal system.
Background
The industrial silicon and ferroalloy submerged arc furnace flue gas generally requires the purification treatment of preheating recovery, dust removal, desulfurization, denitration and the like, so that the standard emission of atmospheric pollutants is realized, and the negative pressure large cloth bag dust remover is the most widely applied dust removing equipment. The back suction ash removal of the existing negative pressure large cloth bag dust remover mainly adopts two modes of air supplementing or air taking from an outlet flue of a main fan. Air is supplemented by adopting the atmosphere, the temperature of the mixed flue gas is reduced by about 20 ℃, and the denitration reaction activity of the flue gas is reduced; the mixed flue gas temperature is reduced by about 10 ℃ when the air is taken from the outlet flue of the main fan, so that the flue gas denitration reaction activity is reduced, a longer pipeline is needed, and the construction cost is increased. If the flue gas denitration efficiency is not affected, the outlet temperature of the waste heat boiler needs to be increased, so that the steam yield is reduced by about 10% -15%, and the production cost is increased.
Disclosure of utility model
The utility model aims to provide a self-circulation air supplementing and back-sucking ash removing negative pressure large cloth bag dust removing system which is used for solving the problem that the emission does not reach standards due to the fact that no desulfurization and denitrification treatment link exists in the existing submerged arc furnace flue gas emission treatment.
The technical scheme of the utility model is realized as follows:
The self-circulation air supplementing and back-sucking ash removing negative pressure big cloth bag dust removing system comprises a negative pressure big cloth bag dust remover, wherein the negative pressure big cloth bag dust remover consists of a plurality of filter chambers; a plurality of filter bags are arranged in each filter chamber, a first air inlet opening is arranged at the bottom of a filter cavity of each filter bag, the plurality of first air inlet openings are connected with an air inlet channel through an air inlet valve, and the air inlet channels are externally connected with a smoke inlet pipeline; the clearance spaces among the filter bags form a smoke exhaust channel, and the smoke exhaust channel is connected with the air outlet channel through an air outlet valve; wherein ash hoppers are arranged below the plurality of first air inlet openings, the bottoms of the ash hoppers are connected with the air inlets of the cyclone dust collectors through back suction valves, the air outlet of the cyclone dust collector is connected with the air inlet of the back suction fan, and the air outlet of the back suction fan is connected with the smoke inlet pipeline.
Optionally, the smoke inlet pipeline is used for conveying dust-containing smoke discharged by the waste heat boiler to the negative pressure large bag-type dust collector.
Optionally, the air-out channel is externally connected with a desulfurization and denitrification system through a smoke exhaust pipeline, and the desulfurization and denitrification system is communicated with a chimney through an induced draft fan.
Optionally, an induced draft fan for exhausting air is arranged on the smoke exhaust pipeline.
Optionally, the filter bags are cylindrical, and a plurality of filter bags are arranged in the filter chamber in a square matrix.
The beneficial effects of the utility model are as follows:
The self-circulation air supplementing and back-suction ash removing negative pressure large cloth bag dust removing system uses the dust removing smoke of the air collecting box as back-suction ash removing and air supplementing air, the temperature of the smoke after air supplementing is basically not reduced, the subsequent denitration efficiency is not influenced, and the steam yield of the waste heat boiler is not reduced. Compared with the air supplementing of the ambient air, the temperature of the flue gas at the outlet of the preheating boiler is about 20 ℃, the steam yield is increased by 10-15%, the production cost is reduced, and the product competitiveness is improved.
Secondly, the system reduces construction investment by eliminating the existing equipment such as a back suction air supplementing system pipeline, a valve and the like; the equipment is reduced, the fault points are fewer, and the operation reliability of the dust removal system is higher.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, 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 only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a self-circulation air-supplementing back-suction ash-removing negative pressure large cloth bag dust removing system.
Reference numerals:
1-an air inlet channel; 2-an air inlet valve; 3-filtering chamber; 4-filtering bags; 5-an air outlet valve; 6-an air outlet channel; 7-ash bucket; 8-a suck-back valve; 9-a cyclone dust collector; 10-a back suction fan.
Detailed Description
The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments.
In the description of the present utility model, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present utility model and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
Example 1
As shown in fig. 1, the embodiment provides a self-circulation air-supplementing back-suction ash-removing negative pressure big cloth bag dust removing system, which comprises a negative pressure big cloth bag dust remover, wherein the negative pressure big cloth bag dust remover consists of a plurality of filter chambers 3;
A plurality of filter bags 4 are arranged in each filter chamber 3, a first air inlet opening is arranged at the bottom of a filter cavity of each filter bag 4, the plurality of first air inlet openings are connected with an air inlet channel 1 through an air inlet valve 2, and the air inlet channels are externally connected with a smoke inlet pipeline;
The clearance spaces among the filter bags 4 form a flue gas exhaust channel, and the flue gas exhaust channel is connected with an air outlet channel 6 through an air outlet valve;
the lower parts of the first air inlet openings are provided with ash hoppers 7, the bottoms of the ash hoppers 7 are connected with air inlets of cyclone dust collectors 9 through back suction valves 8, air outlets of the cyclone dust collectors 9 are connected with air inlets of back suction fans 10, and air outlets of the back suction fans 10 are connected with the smoke inlet pipelines.
Secondly, in the embodiment, the smoke inlet pipeline is used for conveying dust-containing smoke discharged by the waste heat boiler to the negative pressure large bag-type dust collector.
Secondly, in this embodiment, the air outlet channel 6 is externally connected with a desulfurization and denitrification system through a smoke exhaust pipeline, the desulfurization and denitrification system is communicated with a chimney through a draught fan, and dust-removing smoke is discharged through the chimney.
Secondly, in this embodiment, the exhaust duct is provided with an induced draft fan for exhausting air.
Next, in this embodiment, the filter bags 4 are cylindrical, and a plurality of filter bags 4 are disposed in the filter chamber 3 in a square matrix.
The integral operation principle of the self-circulation air supplementing and back-sucking ash removing negative pressure large cloth bag dust removing system is as follows:
Dust-containing flue gas enters an air inlet channel 1 of the negative pressure large cloth bag dust remover from the waste heat boiler, enters a filter bag 4 arranged in a filter chamber 3 through an air inlet valve 2, dust in the flue gas is intercepted by the filter bag 4 to form a filter cake on the inner surface, the dust-removed flue gas passes through the filter bag 4 to enter the filter chamber 3, and enters an air outlet channel 6 through an air outlet valve 5 to be gathered and then is subjected to a desulfurization and denitrification system. Under the action of the reverse suction, filter cakes on the inner surface of the filter bag 4 are peeled off to an ash bucket 7, enter a cyclone dust collector 9 through a reverse suction valve 8 to collect dust, are boosted by a reverse suction fan 10 and return to the air inlet channel 1.
In the self-circulation air supplementing and back-suction ash removing negative pressure large cloth bag dust removing system in the embodiment, the dust removing smoke of the air collecting box is used as back-suction ash removing and air supplementing air, the temperature of the smoke after air supplementing is not basically reduced, the subsequent denitration efficiency is not influenced, and the steam yield of the waste heat boiler is not reduced. Compared with the air supplementing of the ambient air, the temperature of the flue gas at the outlet of the preheating boiler is about 20 ℃, the steam yield is increased by 10-15%, the production cost is reduced, and the product competitiveness is improved.
Secondly, the system reduces construction investment by eliminating the existing equipment such as a back suction air supplementing system pipeline, a valve and the like; the equipment is reduced, the fault points are fewer, and the operation reliability of the dust removal system is higher.
The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should make equivalent substitutions or modifications according to the technical scheme of the present utility model and the inventive concept thereof, and should be covered by the scope of the present utility model.
Claims (5)
1. The self-circulation air supplementing and back-sucking ash removing negative pressure big cloth bag dust removing system is characterized by comprising a negative pressure big cloth bag dust remover, wherein the negative pressure big cloth bag dust remover consists of a plurality of filter chambers (3);
A plurality of filter bags (4) are arranged in each filter chamber (3), a first air inlet opening is arranged at the bottom of a filter cavity of each filter bag (4), the plurality of first air inlet openings are connected with an air inlet channel (1) through an air inlet valve (2), and the air inlet channels are externally connected with a smoke inlet pipeline;
the clearance spaces among the filter bags (4) form a flue gas exhaust channel, and the flue gas exhaust channel is connected with an air outlet channel (6) through an air outlet valve;
The dust collecting device comprises a dust collecting device, a cyclone dust collector (9) and a smoke inlet pipe, wherein the dust collecting device is characterized in that a plurality of dust hoppers (7) are arranged below the first air inlet openings, the bottoms of the dust hoppers (7) are connected with the air inlets of the cyclone dust collector (9) through a back suction valve (8), the air outlets of the cyclone dust collector (9) are connected with the air inlets of a back suction fan (10), and the air outlets of the back suction fan (10) are connected with the smoke inlet pipe.
2. The self-circulation air-supplementing back-sucking ash-removing negative pressure large cloth bag dust removing system according to claim 1, wherein the smoke inlet pipeline is used for conveying dust-containing smoke discharged by a waste heat boiler to the negative pressure large cloth bag dust remover.
3. The self-circulation air-supplementing back-suction ash-removing negative-pressure large cloth bag dust removing system according to claim 1 is characterized in that the air outlet channel (6) is externally connected with a desulfurization and denitrification system through a smoke exhaust pipeline, and the desulfurization and denitrification system is communicated with a chimney through an induced draft fan.
4. The self-circulation air supplementing and back-sucking ash removing negative pressure large cloth bag dust removing system according to claim 3, wherein an induced draft fan for exhausting air is arranged on the smoke exhaust pipeline.
5. The self-circulation air supplementing and back-sucking ash removing negative pressure large cloth bag dust removing system according to claim 1, wherein the filter bags (4) are cylindrical, and a plurality of filter bags (4) are arranged in the filter chamber (3) in a square matrix.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323411024.XU CN221491936U (en) | 2023-12-14 | 2023-12-14 | Self-circulation air supplementing and back suction ash removing negative pressure large cloth bag dust removing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202323411024.XU CN221491936U (en) | 2023-12-14 | 2023-12-14 | Self-circulation air supplementing and back suction ash removing negative pressure large cloth bag dust removing system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN221491936U true CN221491936U (en) | 2024-08-09 |
Family
ID=92138627
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202323411024.XU Active CN221491936U (en) | 2023-12-14 | 2023-12-14 | Self-circulation air supplementing and back suction ash removing negative pressure large cloth bag dust removing system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN221491936U (en) |
-
2023
- 2023-12-14 CN CN202323411024.XU patent/CN221491936U/en active Active
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