CN104226031A - Back-blowing flue gas filtering system and operating method thereof - Google Patents
Back-blowing flue gas filtering system and operating method thereof Download PDFInfo
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- CN104226031A CN104226031A CN201310239873.3A CN201310239873A CN104226031A CN 104226031 A CN104226031 A CN 104226031A CN 201310239873 A CN201310239873 A CN 201310239873A CN 104226031 A CN104226031 A CN 104226031A
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Abstract
The invention discloses a back-blowing flue gas filtering system and an operating method thereof. The back-blowing flue gas filtering system comprises one or more back-blowing pipes (1) educed from a back-blowing gas source, each back-blowing pipe (1) is provided with a tee joint (2), a valve 1 (3) and a valve 2 (7) are arranged behind the tee joint (2), a back-blowing section 1 (6) is connected behind the valve 1 (3), the back-blowing section 1 is connected in series with a back-blowing flue gas filtering device (4) and a back-blowing booster fan (5), and the tail end of the back-blowing section 1 is connected with a back-blowing bag type dust remover dust cleaning system (9); and a back-blowing section 2 (8) is connected behind the valve 2 (7), the back-blowing section 2 (8) is directly connected with the back-blowing bag type dust remover dust cleaning system (9), and the back-blowing section 1 (6) is connected in parallel with the back-blowing section 2 (8). The back-blowing flue gas filtering system is used in a back-blowing bag type dust remover, and when the dust content of back-blowing flue gas is high because a filter bag of the back-blowing bag type dust remover is damaged, the filtering system is started for carrying out secondary filtering, so that the problem that dust is accumulated in the filter bag due to the back-blowing of dust-containing flue gas is solved.
Description
Technical field
The present invention relates to a kind of blowback flue gas filter system and method for work thereof, in back-blowing bag-type dust collector.
Background technology
At present, sack cleaner is widely used in the dusty gas that the industries such as purification metallurgy, mine, chemical industry, cement, generating, grain processing produce in the industry.The operation principle of sack cleaner, be dusty gas is introduced deduster and makes it through the filter bag be located in deduster, namely grit is blocked and stays filter bag surface, forms a dust layer.Pure air then flows out deduster by filter bag smoothly.After running a period of time, the dust layer that bag-type duster filtering bag meets the accumulation of dirt surface is more and more thicker, and the drag losses of deduster is increased.Therefore, after sack cleaner runs a period of time, need to carry out deashing.
Existing exterior sieve type bag-type dust remover is mainly divided into pulse blowing bag type dust precipitator and back-blowing bag-type dust collector by purge mode.Wherein the purge mode of sack cleaner is rushed in pulse spray is filter bag of being jetted at a high speed by the pressure-air of 0.2-0.3Mpa, filter bag is made to produce impulsive inflation vibration from inside to outside, filter bag outer surface obtains very large acceleration, thus shake off the staubosphere on surface, this purge mode, ash-removal effect is better, but deashing air pressure is large, and life-span of the filter bag is short.The ash removal method of back-blowing bag-type dust collector is that deduster is returned in the flue gas drainage after being purified by deduster, and blowback flue gas by filter bag, makes the dirt block of its outer surface come off with the direction contrary with dust-contained airflow.The reverse gas cleaning mode of back-blowing bag-type dust collector can realize whole filter bag blowback air flow method evenly, the advantages such as blowback air gas is forced down, and the deashing time is long, and off-line ash-clearing effect is better, and life-span of the filter bag is longer.
But because back-blowing bag-type dust collector uses the flue gas reverse gas cleaning after deduster filtration, once there is filter bag damage in deduster, the blowback flue gas of backflow can contain higher dust, easily causes dust in deashing process to be accumulated in filter bag inside.If the long period can not effectively process, in filter bag, laying dust can block filter bag gradually, causes filter area to reduce, and exhanst gas outlet dust concentration increases, and filter bag too much even can fall from card because of dust stratification gravity by accumulation, causes sack cleaner major accident.
This problem is not that back-blowing bag-type dust collector is exclusive, the neat stress that in other pulse pocket type dust catcher deashing processes, pulse air fails to be convened for lack of a quorum in injection air-purifying chamber, also ash-laden gas injection can be entered filter bag when filter bag broken bag, but this problem shows more directly perceived in back-blowing bag-type dust collector, often be used for attacking back-blowing bag-type dust collector by people, this problem annoyings back-blowing bag-type dust collector designer throughout the year always, does not have adequate solution method so far.
Summary of the invention
For the deficiency of above-mentioned existing blowback bag type dust removing technology, the technical problem to be solved in the present invention is how to provide a kind of blowback flue gas filter system at blowback pipeline, when realizing filter bag broken bag, dust-laden blowback flue gas can realize secondary filter, solves above-mentioned filter bag inner counter and to blow over dirt problem.
In the development course of back-blowing bag-type dust collector, once the wrongheaded static ash removal method of some projects was had, require that filter bag is tight outside bag cage, shake distortion can not be there is in deashing process, this intermediate item deashing actual effect is poor, have to add blowback booster fan on blowback pipeline, increase the pressure of blowback air-flow, to strengthen ash-removal effect.More this intermediate item was done and was transformed afterwards, tune up the gap of bag cage of filter bag, reduce deashing difficulty, after transformation, original booster fan does not need to start for a long time, under this background, if add a blowback filtrating equipment of flue gas on blowback pipeline, offset the resistance adding blowback filtrating equipment of flue gas and produce with former blowback booster fan, under the prerequisite meeting reverse gas cleaning pressure, the filtration problem of blowback dust contained flue gas can be solved.
A kind of blowback flue gas filter system, comprise the one or more blowback pipeline (1) of drawing from blowback source of the gas, every bar blowback pipeline (1) establishes threeway (2), valve one (3), valve two (7) are set after threeway (2), valve one (3) connects blowback section one (6) afterwards, blowback section one is connected with blowback filtrating equipment of flue gas (4), blowback booster fan (5), and blowback section one end is connected with back-blowing bag-type dust collector soot cleaning system (9); Valve two (7) connects blowback section two (8) afterwards, blowback section two (8) is directly connected with back-blowing bag-type dust collector soot cleaning system (9), blowback section one (6) and blowback section two (8) are parallel relationship, this blowback flue gas filter system is used in back-blowing bag-type dust collector, as because back-blowing bag-type dust collector is because of filter bag damage, when blowback dust contained flue gas is higher, start this filtration system, carry out secondary filter.
Preferably, described blowback filtrating equipment of flue gas (4) to be arranged in blowback booster fan (5) front.
Described blowback filtrating equipment of flue gas (4) can select any deduster in principle, considers the requirement of filter effect, is preferably sack cleaner or electrostatic precipitator.
Described blowback flue gas filter system, is characterized in that, the desirable self-induced-air machine outlet of described blowback source of the gas.
Described blowback flue gas filter system, is characterized in that, described blowback source of the gas can draw Self-duster air-purifying chamber (10).
Described blowback flue gas filter system, is characterized in that, described blowback source of the gas can draw the air outside dust pelletizing system.
The method of work of described blowback flue gas filter system:
Method of work one: back-blowing bag-type dust collector needs deashing, and during without filter bag damage, valve one (3) is closed, blowback booster fan (5) cuts out, and blowback section one (6) is closed; Valve two (7) is opened, blowback section two (8) conducting blowback source of the gas and reverse blowing dust remover soot cleaning system (9), blowback flue gas flows out from blowback source of the gas, by blowback section two (8), enter into reverse blowing dust remover soot cleaning system (9) and deashing is carried out to filter bag; Deashing is complete, and valve two (7) is closed; When back-blowing bag-type dust collector needs deashing, and when there is filter bag damage, valve two (7) is closed, and blowback section two (8) is closed; Valve one (3) is opened, blowback booster fan (5) is opened, blowback section one (7) conducting blowback source of the gas and reverse blowing dust remover soot cleaning system (9), blowback flue gas flows out from blowback source of the gas, by blowback flue gas filter system (4) and through blowback booster fan (5) supercharging, then enter into reverse blowing dust remover soot cleaning system (9) deashing is carried out to filter bag; Deashing is complete, and valve one (3) is closed, and blowback booster fan (5) cuts out.
Method of work two: back-blowing bag-type dust collector needs deashing, valve two (7) is closed, and blowback passage two (8) is closed; Valve one (3) is opened, blowback booster fan (5) is opened, blowback section one (6) conducting blowback source of the gas and reverse blowing dust remover soot cleaning system (9), blowback flue gas flows out from blowback source of the gas, by blowback flue gas filter system (4) and through blowback booster fan (5) supercharging, then enter into reverse blowing dust remover soot cleaning system (9) deashing is carried out to filter bag; Deashing is complete, and valve one (3) is closed, and blowback booster fan (5) cuts out.
The present invention utilizes the existing booster fan of back-blowing bag-type dust collector, blowback pipeline adds sack cleaner, realizes the secondary filter of blowback flue gas, thus ensure that when filter bag damage, ash-laden gas can not enter into filter bag inside at deashing process, avoids filter bag dust stratification.Due to filter bag damage, it is the defect that pulse blowing bag type dust precipitator and back-blowing bag-type dust collector have that ash-laden gas enters into filter bag inside at deashing process, there is no the invention solving pulse blowing bag type dust precipitator problems at present to occur, the present invention can further improve the technical advantage of back-blowing bag-type dust collector, improves its market competitiveness.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention
In figure: 1, reverse-blow pipe; 2, threeway; 3, valve one; 4, blowback filtrating equipment of flue gas; 5, blowback booster fan; 6, blowback section 1, valve two; 8, blowback section two; 9, back-blowing bag-type dust collector soot cleaning system; 10, dust catcher gas purifying chamber.
Detailed description of the invention
Specific embodiments is as follows:
A kind of blowback flue gas filter system, comprise the one or more blowback pipeline (1) of drawing from blowback source of the gas, threeway (2) established by every bar blowback pipeline, valve one (3), valve two (7) are set after threeway, valve one (3) connects blowback section one (6) afterwards, blowback section one is connected with blowback filtrating equipment of flue gas (4), blowback booster fan (5), and blowback section one end is connected with back-blowing bag-type dust collector soot cleaning system (9); Valve two (7) connects blowback section two (8) afterwards, blowback section two (8) is directly connected with back-blowing bag-type dust collector soot cleaning system (9), blowback section one (6) and blowback section two (8) are parallel relationship, this blowback flue gas filter system is used in back-blowing bag-type dust collector, as because back-blowing bag-type dust collector is because of filter bag damage, when blowback dust contained flue gas is higher, start this filtration system, carry out secondary filter.
It is front that described blowback filtrating equipment of flue gas (4) is arranged in blowback booster fan (5), and described blowback filtrating equipment of flue gas (4) can select any deduster in principle, considers the requirement of filter effect, preferably uses sack cleaner.Described blowback source of the gas takes from air-introduced machine outlet.This position flue gas is neat stress after purification, to unite warm homogeneity, and after air-introduced machine supercharging, bleed pressure comparatively inside of bag type dust collector height about 3000Pa herein, is beneficial to deashing with deduster inside smoke.
The method of work of described blowback flue gas filter system:
Method of work one: back-blowing bag-type dust collector needs deashing, and during without filter bag damage, valve one (3) is closed, blowback booster fan (5) cuts out, and blowback section one (6) is closed; Valve two (7) is opened, blowback section two (8) conducting blowback source of the gas and reverse blowing dust remover soot cleaning system (9), blowback flue gas flows out from blowback source of the gas, by blowback section two (8), enter into reverse blowing dust remover soot cleaning system (9) and deashing is carried out to filter bag; Deashing is complete, and valve two (7) is closed; When back-blowing bag-type dust collector needs deashing, and when there is filter bag damage, valve two (7) is closed, and blowback section two (8) is closed; Valve one (3) is opened, blowback booster fan (5) is opened, blowback section one (7) conducting blowback source of the gas and reverse blowing dust remover soot cleaning system (9), blowback flue gas flows out from blowback source of the gas, by blowback flue gas filter system (4) and through blowback booster fan (5) supercharging, then enter into reverse blowing dust remover soot cleaning system (9) deashing is carried out to filter bag; Deashing is complete, and valve one (3) is closed, and blowback booster fan (5) cuts out.
Method of work two: back-blowing bag-type dust collector needs deashing, valve two (7) is closed, and blowback passage two (8) is closed; Valve one (3) is opened, blowback booster fan (5) is opened, blowback section one (6) conducting blowback source of the gas and reverse blowing dust remover soot cleaning system (9), blowback flue gas flows out from blowback source of the gas, by blowback flue gas filter system (4), in general through secondary filter, there is the crushing of about 2000Pa, through blowback booster fan (5) supercharging 2000-5000Pa, then enter into reverse blowing dust remover soot cleaning system (9) deashing is carried out to filter bag; Deashing is complete, and valve one (3) is closed, and blowback booster fan (5) cuts out.
The present invention is not limited to above-mentioned example; anyone can draw other various forms of products under enlightenment of the present invention; no matter but any change is done in its shape and structure and component names; every possess identical with the application or akin technical scheme, all drops within protection scope of the present invention.
Claims (13)
1. a blowback flue gas filter system, comprise the one or more blowback pipeline (1) of drawing from blowback source of the gas, every bar blowback pipeline (1) establishes threeway (2), valve one (3), valve two (7) are set after threeway (2), valve one (3) connects blowback section one (6) afterwards, blowback section one is connected with blowback filtrating equipment of flue gas (4), blowback booster fan (5), and blowback section one end is connected with back-blowing bag-type dust collector soot cleaning system (9); Valve two (7) connects blowback section two (8) afterwards, blowback section two (8) is directly connected with back-blowing bag-type dust collector soot cleaning system (9), and blowback section one (6) and blowback section two (8) are parallel relationship.
2. blowback flue gas filter system as claimed in claim 1, it is characterized in that, it is front that described blowback filtrating equipment of flue gas (4) is arranged in blowback booster fan (5).
3. blowback flue gas filter system as claimed in claim 1, is characterized in that, the desirable self-induced-air machine outlet of described blowback source of the gas.
4. blowback flue gas filter system as claimed in claim 1, it is characterized in that, described blowback source of the gas can draw Self-duster air-purifying chamber (10).
5. blowback flue gas filter system as claimed in claim 1, it is characterized in that, described blowback source of the gas can draw the air outside dust pelletizing system.
6. blowback flue gas filter system as claimed in claim 1, it is characterized in that, described blowback filtrating equipment of flue gas (4) can be sack cleaner.
7. blowback flue gas filter system as claimed in claim 1, it is characterized in that, described blowback filtrating equipment of flue gas (4) can be electrostatic precipitator.
8. blowback flue gas filter system as claimed in claim 3, it is characterized in that, described blowback filtrating equipment of flue gas (4) ash removal method is pulse dust cleaning.
9. blowback flue gas filter system as claimed in claim 3, it is characterized in that, described blowback filtrating equipment of flue gas (4) ash removal method is reverse gas cleaning.
10. blowback flue gas filter system as claimed in claim 3, it is characterized in that, described blowback filtrating equipment of flue gas (4) ash removal method is mechanical rapping cleaning dust.
11. blowback flue gas filter systems as claimed in claim 3, is characterized in that, the interior filter bag of described blowback filtrating equipment of flue gas (4) is consumptive material, does not carry out deashing process.
12. blowback flue gas filter system method of works one: back-blowing bag-type dust collector needs deashing, and during without filter bag damage, valve one (3) is closed, blowback booster fan (5) cuts out, and blowback section one (6) is closed; Valve two (7) is opened, blowback section two (8) conducting blowback source of the gas and reverse blowing dust remover soot cleaning system (9), blowback flue gas flows out from blowback source of the gas, by blowback section two (8), enter into reverse blowing dust remover soot cleaning system (9) and deashing is carried out to filter bag; Deashing is complete, and valve two (7) is closed; When back-blowing bag-type dust collector needs deashing, and when there is filter bag damage, valve two (7) is closed, and blowback section two (8) is closed; Valve one (3) is opened, blowback booster fan (5) is opened, blowback section one (7) conducting blowback source of the gas and reverse blowing dust remover soot cleaning system (9), blowback flue gas flows out from blowback source of the gas, by blowback flue gas filter system (4) and through blowback booster fan (5) supercharging, then enter into reverse blowing dust remover soot cleaning system (9) deashing is carried out to filter bag; Deashing is complete, and valve one (3) is closed, and blowback booster fan (5) cuts out.
13. blowback flue gas filter system method of works two: back-blowing bag-type dust collector needs deashing, valve two (7) is closed, and blowback passage two (8) is closed; Valve one (3) is opened, blowback booster fan (5) is opened, blowback section one (6) conducting blowback source of the gas and reverse blowing dust remover soot cleaning system (9), blowback flue gas flows out from blowback source of the gas, by blowback flue gas filter system (4) and through blowback booster fan (5) supercharging, then enter into reverse blowing dust remover soot cleaning system (9) deashing is carried out to filter bag; Deashing is complete, and valve one (3) is closed, and blowback booster fan (5) cuts out.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310239873.3A CN104226031A (en) | 2013-06-18 | 2013-06-18 | Back-blowing flue gas filtering system and operating method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310239873.3A CN104226031A (en) | 2013-06-18 | 2013-06-18 | Back-blowing flue gas filtering system and operating method thereof |
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| CN104226031A true CN104226031A (en) | 2014-12-24 |
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| CN201310239873.3A Pending CN104226031A (en) | 2013-06-18 | 2013-06-18 | Back-blowing flue gas filtering system and operating method thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106693587A (en) * | 2017-03-07 | 2017-05-24 | 内蒙古碳谷科技有限公司 | Disturbance-free ash recovery device and recovery technique thereof |
| CN113018995A (en) * | 2021-02-25 | 2021-06-25 | 四川思达能环保科技有限公司 | Method for preventing condensation of filter element in dust collector back flushing and dust collector back flushing device |
| CN115445338A (en) * | 2022-08-02 | 2022-12-09 | 呼伦贝尔安泰热电有限责任公司东海拉尔发电厂 | Pulse bag-type dust collector |
-
2013
- 2013-06-18 CN CN201310239873.3A patent/CN104226031A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106693587A (en) * | 2017-03-07 | 2017-05-24 | 内蒙古碳谷科技有限公司 | Disturbance-free ash recovery device and recovery technique thereof |
| CN113018995A (en) * | 2021-02-25 | 2021-06-25 | 四川思达能环保科技有限公司 | Method for preventing condensation of filter element in dust collector back flushing and dust collector back flushing device |
| CN115445338A (en) * | 2022-08-02 | 2022-12-09 | 呼伦贝尔安泰热电有限责任公司东海拉尔发电厂 | Pulse bag-type dust collector |
| CN115445338B (en) * | 2022-08-02 | 2023-11-03 | 呼伦贝尔安泰热电有限责任公司东海拉尔发电厂 | Pulse cloth bag dust collector |
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Application publication date: 20141224 |