CN101254386A - Semi-off-line deash bag dust-cleaning equipment - Google Patents
Semi-off-line deash bag dust-cleaning equipment Download PDFInfo
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- CN101254386A CN101254386A CNA2008100185801A CN200810018580A CN101254386A CN 101254386 A CN101254386 A CN 101254386A CN A2008100185801 A CNA2008100185801 A CN A2008100185801A CN 200810018580 A CN200810018580 A CN 200810018580A CN 101254386 A CN101254386 A CN 101254386A
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Abstract
The invention discloses a half off-line bag filter, which belongs to the technology field of a dust remover. The invention aims to provide a half off-line bag filter which can improve the dust-cleaning efficiency, reduce the resistance of the dust remover, and avoid the damage to the dust remover body caused by the excessive negative pressure in an air cleaning room which is arranged at the upper part of a tubesheet when dust is cleaned. The invention is characterized in that an air cleaning room (9) arranged at the upper side of each row of filter bags of each bag chamber is internally provided with jet pipes (7) corresponding to each row of filter bags (4) in parallel, and the inlet ends of the jet pipes are connected with the outlets of pulse valves (6); nozzles (8) which are parallel with the jet pipes, have the same quantity as the filter bags the same centers with the filter bag mouths are arranged on the jet pipes; and a poppet valve (10) which has two working states of full open and semi close is arranged on a box body arranged on one side of the upper side of each bag chamber. Compared with the off-line dust cleaning, the half off-line bag filter cannot increase the filtration load of other bag chambers; compared with the on-line dust cleaning, the filtration velocity of the bag chambers and the velocity among the bag chambers are reduced by 1/2 to 2/3, thereby being more beneficial to the deposition of the discharged dust.
Description
Technical field
The present invention relates to a kind of semi-off-line deash bag dust-cleaning equipment, belong to the bag dust collector technical field.
Background technology
At present, be widely used in the horizontal pulse bag dust collector of building materials, metallurgy industry, be 3 inches heavy caliber pulse valves to be housed at each row's filter bag, equate and the winding-up arm concentric by one the 3 inches winding-up pipes parallel, with filter bag quantity with filter pocket mouths with card, (air-flow of injection is 2-4 a times of air supply) air-flow of compressed air about 0.3MPa and injection is sprayed in the filter bag simultaneously, reach the deashing purpose.
The horizontal pulse bag dust collector is divided into two types of off-line and online ash removal by purge mode.
Off-line ash-clearing is meant that cutting off certain unit filtered airflow carries out deashing to this unit filter bag; Advantage is the cleaning efficiency height, and shortcoming is when cutting off certain unit filtered airflow, increases the filtration load of other filter element; Simultaneously, because the deashing unit is a unit of relative closure, in the moment of winding-up, the deashing unit does not have more injection air-flow to replenish, and makes the bigger negative pressure of air-purifying chamber space moment formation on card top, deashing unit, causes equipment region of interest cracking.
Online ash removal is meant the deashing while filtering; Advantage is to cut off the filtered airflow of filter element, do not increase the filtration load of other filter element during deashing, shortcoming is that the air-flow that rises between by filter bag the decline process than particle dust under the filter bag supernatant holds up once more, adsorbed by filter bag, cleaning efficiency is low, makes that the deduster running resistance is higher.
Summary of the invention
The objective of the invention is to overcome the shortcoming of above-mentioned two class horizontal pulse bag dust collectors, a kind of semi-off-line deash bag dust-cleaning equipment is provided, it can either improve cleaning efficiency, reduces dust remover resistance, the air-purifying chamber negative pressure excessive damage that the deduster body is caused in card top in the time of can avoiding deashing again.
Its technical scheme is: a kind of semi-off-line deash bag dust-cleaning equipment, comprise the casing of being with ash bucket, be arranged in the casing by the chamber dividing plate and be installed in each bag chamber that the filter bag on the card constitutes, by the air-purifying chamber that forms between card and the casing top, reach the air inlet duct and the exhaust passage that constitute by the air channel dividing plate, it is characterized in that: in the air-purifying chamber of every row's filter bag top of described each bag chamber, all be arranged with in parallel and the corresponding jet pipe of every row's filter bag, the entrance point of jet pipe is connected with the outlet of pulse valve; Jet pipe is provided with vertical with jet pipe, identical and concentric nozzle with filter pocket mouths with filter bag quantity; On the casing of top, each bag chamber one side a lift valve with standard-sized sheet and two kinds of duties of semi-closure is set all.
Above-mentioned lift valve semi-closure duty is the valve closing 1/2-2/3 of lift valve.
Its technique effect is: because by the lift valve with standard-sized sheet and two kinds of duties of semi-closure, pulse valve, jet pipe and nozzle constitute each bag chamber pulse dust cleaning system, so when the deashing of certain bag chamber of bag dust collector, can (at this moment the air-flow rate of climb between this bag chamber filtration velocity and filter bag all can reduce with the valve closing 1/2-2/3 of this bag chamber lift valve, help the sedimentation of dust during deashing), open each pulse valve of this bag chamber then successively, by linking to each other and the jet pipe parallel with the card hole with the pulse valve outlet, vertical with jet pipe and concentric with filter pocket mouths nozzle sprays into filter bag with compressed air; When compressed air sprayed into filter bag, injection air supply 2-4 surrounding air doubly entered filter bag jointly; Because the air-out lift valve is in part open and close state, in injection, clean gas in the exhaust passage is by the air-purifying chamber space make-up of air outlet to card top, like this, both guaranteed the injection throughput, reach best ash-removal effect, can not make the air-purifying chamber space on card top form big negative pressure again.Both reduce the compressed air air consumption, can reduce dust adsorbance on the filter bag again, greatly reduced the filtration resistance and the outlet dusty gas concentration discharge of filter bag, the service life of having improved filter bag.
Compare with off-line ash-clearing, this semi-off-line deash bag dust-cleaning equipment can not increase the filtration load of other bag chamber; Compare with online ash removal, wind speed reduces 1/2-2/3 between bag chamber filtration velocity of this semi-off-line deash bag dust-cleaning equipment and bag, more helps the sedimentation of the dust of being stripped from.Therefore, semi-off-line deash bag dust-cleaning equipment advantage highly significant really can be realized low-pressure, big air quantity deashing, compare with other two kinds of bag dust collectors of air quantity with same specification, technical-economic index holds a safe lead, complete machine running resistance 600-1000Pa, outlet discharging＜25mg/nm
3, the system fan power consumption can be saved 30%-50%, and life-span of the filter bag can reach 3 years.Be applicable to long bag dust collector of horizontal pulse or short bag dust collector.
Description of drawings
Fig. 1 is a structural representation of the present invention;
Fig. 2 is a bag cell structure schematic diagram of the present invention.
The specific embodiment
As shown in Figure 1, 2, a kind of semi-off-line deash bag dust-cleaning equipment, comprise the casing 3 of being with ash bucket 2, be arranged in the casing by chamber dividing plate 15 and be installed in each bag chamber 11 that the filter bag 4 on the card 5 constitutes, by the air-purifying chamber 9 that forms between card 5 and the casing top, reach the air inlet duct 12 and the exhaust passage 14 that constitute by air channel dividing plate 13.In the air-purifying chamber of every row's filter bag top of each bag chamber, all be arranged with in parallel and the corresponding jet pipe 7 of every row's filter bag, the entrance point of jet pipe is connected with the outlet of pulse valve 6; Jet pipe is provided with vertical with jet pipe, identical and concentric nozzle 8 with filter pocket mouths with filter bag quantity; On the casing of top, each bag chamber one side a lift valve 10 with standard-sized sheet and two kinds of duties of semi-closure is set all.
Above-mentioned lift valve 10 semi-closure duties are meant the valve closing 1/2-2/3 with lift valve.
Said nozzle to the distance of filter pocket mouths is 75--85mm.
The bottom of above-mentioned ash bucket 2 is provided with ash-discharging device 1.
Its operation principle: when dusty gas enters ash bucket by blast pipe, oarse-grained dust is here because gravity and inertial collision at first fall into ash bucket, played the effect of gathering dust in advance, all the other thinner dust along with air-flow after filter bag filters, dust is delayed at the outer surface of filter bag, purified gas enters exhaust duct via air-purifying chamber, lifting valve opening, enters atmosphere by blower fan then, thereby has reached the purification purpose.Along with constantly carrying out of filtering, dust attached to the filter bag outside constantly thickens, the resistance of dust-precipitator also constantly rises, when resistance reaches certain value, need dust-precipitator is carried out deashing, at this moment, controller sends instruction to " pulse dust cleaning system ", at first, first bag of chamber lift valve cuts out 1/2-2/3, reduces the filtering gas amount (filtration velocity reduces 1/2-2/3) of first bag of chamber, this bag of chamber pulse valve is opened (0.15 second) successively, and pass through jet pipe, nozzle enters filter bag inside jointly with the compressed air of 0.2-0.3Mpa and by the air-flow of injection in the air channel, makes the filter bag vibrations, blow-up, the dust that accumulates in the filter bag outer surface is stripped from, fall into ash bucket, after 4 seconds, reopen the lift valve of first Room, first Room enters the filtration state once more; Deashing is carried out by said process successively in each chamber, so circulation.The soot cleaning system operating frequency can be adjusted according to the dust remover resistance situation.
Claims (4)
1, a kind of semi-off-line deash bag dust-cleaning equipment, comprise the casing of being with ash bucket, be arranged in the casing by the chamber dividing plate and be installed in each bag chamber that the filter bag on the card constitutes, by the air-purifying chamber that forms between card and the casing top, reach the air inlet duct and the exhaust passage that constitute by the air channel dividing plate, it is characterized in that: in the air-purifying chamber (9) of every row's filter bag top of described each bag chamber, all be arranged with in parallel and the corresponding jet pipe of every row's filter bag (4) (7), the entrance point of jet pipe is connected with the outlet of pulse valve (6); Jet pipe is provided with vertical with jet pipe, identical and concentric nozzle (8) with filter pocket mouths with filter bag quantity; On the casing of top, each bag chamber one side a lift valve (10) with standard-sized sheet and two kinds of duties of semi-closure is set all.
2, a kind of semi-off-line deash bag dust-cleaning equipment according to claim 1 is characterized in that: described lift valve (10) semi-closure duty is the valve closing 1/2-2/3 of lift valve.
3, a kind of semi-off-line deash bag dust-cleaning equipment according to claim 1 is characterized in that: described nozzle (8) to the distance of filter pocket mouths is 75--85mm.
4, a kind of semi-off-line deash bag dust-cleaning equipment according to claim 1 is characterized in that: the bottom of described ash bucket (2) is provided with ash-discharging device (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100185801A CN101254386A (en) | 2008-02-27 | 2008-02-27 | Semi-off-line deash bag dust-cleaning equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100185801A CN101254386A (en) | 2008-02-27 | 2008-02-27 | Semi-off-line deash bag dust-cleaning equipment |
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| Publication Number | Publication Date |
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| CN101254386A true CN101254386A (en) | 2008-09-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008100185801A Pending CN101254386A (en) | 2008-02-27 | 2008-02-27 | Semi-off-line deash bag dust-cleaning equipment |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104548852A (en) * | 2015-01-30 | 2015-04-29 | 福建龙净环保股份有限公司 | Electric-bag compound dust remover |
| CN104759166A (en) * | 2015-03-19 | 2015-07-08 | 马佳林 | Energy-saving dust removal apparatus |
| CN106268076A (en) * | 2016-08-29 | 2017-01-04 | 合肥合意环保科技工程有限公司 | A kind of Novel pulse exhaust dust device with bag |
| CN108554033A (en) * | 2018-07-16 | 2018-09-21 | 青岛恒林机械有限公司 | A kind of the chamber-dividing counter-blowing structure and its operating method of deduster |
| CN113521899A (en) * | 2021-07-29 | 2021-10-22 | 福建龙净环保股份有限公司 | Ash removal method of bag type dust collector |
-
2008
- 2008-02-27 CN CNA2008100185801A patent/CN101254386A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104548852A (en) * | 2015-01-30 | 2015-04-29 | 福建龙净环保股份有限公司 | Electric-bag compound dust remover |
| CN104759166A (en) * | 2015-03-19 | 2015-07-08 | 马佳林 | Energy-saving dust removal apparatus |
| CN106268076A (en) * | 2016-08-29 | 2017-01-04 | 合肥合意环保科技工程有限公司 | A kind of Novel pulse exhaust dust device with bag |
| CN108554033A (en) * | 2018-07-16 | 2018-09-21 | 青岛恒林机械有限公司 | A kind of the chamber-dividing counter-blowing structure and its operating method of deduster |
| CN113521899A (en) * | 2021-07-29 | 2021-10-22 | 福建龙净环保股份有限公司 | Ash removal method of bag type dust collector |
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Open date: 20080903 |