CN103055617A - Compartment stepping washing self-deashing bag-type dust remover and dust removing method - Google Patents

Compartment stepping washing self-deashing bag-type dust remover and dust removing method Download PDF

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Publication number
CN103055617A
CN103055617A CN2012105796136A CN201210579613A CN103055617A CN 103055617 A CN103055617 A CN 103055617A CN 2012105796136 A CN2012105796136 A CN 2012105796136A CN 201210579613 A CN201210579613 A CN 201210579613A CN 103055617 A CN103055617 A CN 103055617A
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China
Prior art keywords
locellus
dust
filter bag
air inlet
casing
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Pending
Application number
CN2012105796136A
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Chinese (zh)
Inventor
郝文阁
周伟男
孙曼丽
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Northeastern University China
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Northeastern University China
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Priority to CN2012105796136A priority Critical patent/CN103055617A/en
Publication of CN103055617A publication Critical patent/CN103055617A/en
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Abstract

A compartment stepping washing self-deashing bag-type dust remover and a dust removing method belong to the field of environmental protection technology. The dust remover of the invention can not only clear the dust layer on the bag wall surface of a filter bag, but also prevent the dust remover wind amount increase formed during a deashing airflow secondary filter process. The dust remover includes an upper tank body, wherein compartment dividing boards are arranged inside the upper tank body, an air inlet header is arranged at the side portion of the upper tank body, an air inlet window is arranged between the air inlet header and each compartment, and the air inlet window is provided with a gate valve which is connected to a solenoid; a middle tank body arranged under the upper tank body, wherein an upper porous board, a lower porous board and filter bags are arranged inside the middle tank body; and an air outlet header is arranged at the side portion of the middle tank body. The dust removing method of the present invention is as follows: opening a gate valve, so that dust-containing air clears the dust layer on the filter bag, and the other filter bags filter the dust-containing air; and then opening the next gate valve, and closing the other gate valve to form an orderly cycle of filter bag clearing and filtering.

Description

A kind of locellus step-by-step movement is washed away from bag type dust-remover and dust collection method
Technical field
The invention belongs to environmental protection technical field, relate to the powder reclaimer in cleaner and the powder industry, particularly relate to a kind of locellus step-by-step movement and wash away from bag type dust-remover and dust collection method.
Background technology
Sack cleaner is high because of its dust purification efficient, and the advantages such as dust attribute strong adaptability are widely used in the fields such as exhaust gas dust purification and powder material recovery.Sack cleaner when work, along with dust-contained airflow by the filter bag filtration, purification, formed the dust layer of progressive additive on the surface of filter bag filter wall, dust layer causes the filtration resistance of gas to increase.Must filter the too much dust layer of wall surface to filter bag for the normal operating conditions of recovering filter bag and remove, be i.e. so-called deashing.
The purge mode of tradition sack cleaner can be divided three classes substantially:
(1) mechanical rapping cleaning dust, its principle is to rely on the mechanical shaking of filter bag or filter bag frame is realized coming off of dust layer, because mechanical shaking is decayed rapidly along the bag length direction at the acceleration that the filter bag surface forms, this purge mode generally is only applicable to the short small-size dust remover of filter bag;
(2) contrary air-flow deashing, its principle is by at pipeline reversal valve being installed, to the deashing air-flow of filter bag importing with the filtered airflow opposite direction, the peeling force that the deashing air-flow forms at dust layer because of gas viscosity when passing through filter bag and surface dust layer thereof realizes the stripping of dust layer by reversal valve.This purge mode need not to dispose the characteristics such as other sources of the gas because its soot cleaning system structure is comparatively simple, has more widely to use in big-and-middle-sized deduster.But the back draught that deashing adopts not only causes deduster to process the fluctuation of component, and the secondary filter process that will go through of deashing air-flow also can cause the increase of air-introduced machine energy consumption;
What (3) be most widely used at present both at home and abroad is the pulse jetting deashing mode of calming the anger, its principle is to open by the moment of pulse valve on the soot cleaning system, gases at high pressure in the gas storage bag spray into air pulse through nozzle in filter bag, utilize and the stripping of the air pulse of filtered airflow opposite direction and the two synergy of inertia force that air pulse impacts the backward acceleration that forms at the filter bag wall, realize the peeling off of dust layer on the filter bag wall.The outstanding advantages of this purge mode is that deashing intensity is high.But, to experience the defective of secondary filter except still there being the deashing air-flow, also exist deashing process too acutely to affect life of bag filter, need configuration high-pressure air source, the high deficiency of deashing energy consumption.
Summary of the invention
Problem for the prior art existence, the invention provides a kind of locellus step-by-step movement washes away from bag type dust-remover, this deduster can be removed the dust layer of filter bag wall surface, avoided again the formed deduster of deashing air-flow secondary filter process to process the increase of air quantity, and the increase of consequent dust pelletizing system energy consumption, and simple in structure.
To achieve these goals, the present invention adopts following technical scheme, a kind of locellus step-by-step movement is washed away from bag type dust-remover, comprise upper box, inside at upper box arranges the locellus that is formed by the locellus dividing plate, be provided with the air inlet header in the side of upper box, be provided with air inlet pipe at an end of air inlet header; Be provided with the air inlet window between air inlet header and each locellus, be provided with slide valve at the air inlet window, the top of slide valve is connected with upper box electromagnet outward; Be provided with middle casing below upper box, be provided with upper face plate at the top of middle casing, be provided with lower face plate in the bottom of middle casing, described upper and lower card has through hole, and the position of upper and lower card through hole is corresponding one by one; Be provided with several filter bags in the inside of middle casing, the described filter bag two ends respectively through hole corresponding with upper and lower card are connected; Side at middle casing is provided with the header of giving vent to anger, and is provided with the bar sealing of giving vent to anger at the sidewall of middle casing, and the header of giving vent to anger is connected with middle casing by the bar sealing of giving vent to anger, and is provided with escape pipe at an end of the described header of giving vent to anger; Below middle casing, be provided with ash bucket, be provided with unloading valve in the lower end of ash bucket.
Described locellus quantity is 4 to 10.
Described air inlet window is circle or rectangle.
Adopt described locellus step-by-step movement to wash away dust collection method from bag type dust-remover, specifically comprise the steps:
Step 1: open a slide valve by described electromagnet, make dusty gas carry out deashing to the dust layer on the filter bag of the corresponding locellus of described slide valve, the filter bag of other locellus carries out filtration, purification to dusty gas;
Step 2: open the slide valve of next locellus, close the slide valve of other locellus, continue the dust layer on filter bag corresponding to described locellus is carried out deashing, other locellus carry out filtration, purification to dusty gas; Remain that a filter bag corresponding to locellus is in the deashing duty, all the other locellus filter bags are in the filtration duty, form the orderly circulation of filter bag ash removal and filtration.
Beneficial effect of the present invention:
Deduster structure of the present invention is simpler, and the lower of deashing air-flow helps to peel off dust layer sedimentation in ash bucket to flowing; What is more important, air quantity and the pressure loss held stationary when the present invention moves, compare with back draught deashing and the pulse jetting deashing of calming the anger, avoided the formed deduster of deashing air-flow secondary filter process to process the increase of air quantity and the increase of consequent dust pelletizing system energy consumption.
Description of drawings
Fig. 1 is that locellus step-by-step movement of the present invention is washed away the structural representation from bag type dust-remover;
Fig. 2 is the side view of Fig. 1;
Fig. 3 is the A-A cutaway view of Fig. 1;
Among the figure, 1--electromagnet, 2--slide valve, 3--air inlet pipe, 4--locellus dividing plate, 5--air inlet window, 6--upper face plate, the 7--filter bag, 8--ash bucket, 9--lower face plate, 10--unloading valve, the 11--bar sealing of giving vent to anger, the 12--escape pipe, the 13--header of giving vent to anger, 14--air inlet header, 15--upper box, casing among the 16--, 17-locellus, 18-through hole.
The specific embodiment
The present invention is described in further detail below in conjunction with the drawings and specific embodiments.
Embodiment 1:
Present embodiment is applied to the dust purification of blast furnace tapping hole flue gas, and air inlet pipe of the present invention is connected with the gas skirt of tapping hole.
Such as Fig. 1~shown in Figure 3, a kind of locellus step-by-step movement is washed away from bag type dust-remover, comprises upper box 15, in the inside of upper box 15 locellus 17 that is formed by locellus dividing plate 4 is set, be provided with air inlet header 14 in the side of upper box 15, be provided with air inlet pipe 3 at an end of air inlet header 14; Be provided with air inlet window 5 between air inlet header 14 and each locellus 17, be provided with slide valve 2 at air inlet window 5, the top of slide valve 2 is connected with locellus 17 electromagnet 1 outward; Be provided with middle casing 16 below upper box 15, be provided with upper face plate 6 at the top of middle casing 16, be provided with lower face plate 9 in the bottom of middle casing 16, described upper and lower card has through hole 18, and the position of upper and lower card through hole 18 is corresponding one by one; Be provided with several filter bags 7 in the inside of middle casing 16, the described filter bag 7 two ends respectively through hole 18 corresponding with upper and lower card are connected; Be provided with the header 13 of giving vent to anger in the side of middle casing 16, be provided with the bar sealing 11 of giving vent to anger at the sidewall of middle casing 16, the header of giving vent to anger 13 is connected with middle casing 16 by the bar sealing 11 of giving vent to anger, and is provided with escape pipe 12 at an end of the described header 13 of giving vent to anger; Below middle casing 16, be provided with ash bucket 8, be provided with unloading valve 10 in the lower end of ash bucket 8.
Described locellus 17 quantity are 5, and the filter area of each locellus 17 is 38m2.
Described air inlet window 5 is circular.
Filter bag 7 quantity during the air quantity of processing is as required determined in the casing 16, for example filter bag 7 quantity in each locellus 17 are 30 described in the present embodiment, are of a size of φ 100x2000mm.
Described filter bag 7 materials are the glass Nomex.
One-time dedusting process below in conjunction with the description of drawings present embodiment:
Such as Fig. 1~shown in Figure 3, open a slide valve 2 by electromagnet 1, under the effect of air-introduced machine blast, the ash-laden gas that is entered by air inlet pipe 3 enters air inlet header 14, in the locellus 17 of the upper box 15 that the slide valve 2 that then enters and open is corresponding, dusty gas is flowed in the filter bag 7 of these locellus 17 correspondences by filter bag 7 upper port that are fixed on the upper face plate 6 under the poor promotion of stream pressure;
Dusty gas is in filter bag 7 interior flow process, small part gas is by flowing to filter bag 7 external spaces by filter bag 7 filter walls in the filter bag 7, most of gas flows along the axial top-down of filter bag 7, because dust-contained airflow is filtered walls and the resistance of filtering the dust layer on the wall along the resistance that filter bag 7 axial directions flow much smaller than radial penetration filter bag 7, so most gas will flow out from filter bag 7 lower port that are fixed on the lower face plate 9.Because entering the dusty gas flow of this locellus 17 filter bags 7 is that deduster is always processed flow, so dusty gas top-downly has larger axial wind speed when mobile in that filter bag 7 is interior, and axial flow must produce strong souring to filter bag 7 inwalls.Utilize high velocity air to the souring of filter bag 7 inwalls, the dust layer in the filter bag 7 of described locellus 17 correspondences is peeled off, described dust layer is to capture and be deposited on filter bag 7 inwalls when dusty gas is filtered;
In the dust layer fragment of being stripped from and the dusty gas larger granule dust together from be fixed on filter bag 7 lower port on casing 16 lower face plates 9 fall in the ash bucket 8, realize the ash-removal effect of the filter bag 7 of described locellus 17 correspondences;
Flow into remaining dusty gas of ash bucket 8 then under the promotion of pressure differential from lower face plate 9, flow into from bottom to top in the filter bag 7 of other locellus 17 by filter bag 7 lower port that are fixed on the lower face plate 9, gas is in the process that upwards flows, dust in the dusty gas is filtered and is deposited on filter bag 7 inner surfaces, clean gas is finished the filtration, purification to dusty gas by the bag external space that the filter bag wall enters middle casing 16;
Enter the header 13 of giving vent to anger by the clean gas that flows to 16 bags of external spaces of middle casing in the filter bag 7 through the bar sealing 11 of giving vent to anger, finally discharge by escape pipe 12;
Continuation is carried out deashing to the filter bag 7 of next locellus 17 correspondences, adopt step-by-step system to open the slide valve 2 of next locellus 17, and the slide valve 2 of other locellus 17 is in closed condition, keep having all the time the filter bag 7 of locellus 17 correspondences to be in the deashing duty, all the other locellus 17 filter bags 7 are in the filtration duty, form the orderly circulation of filter bag 7 deashings and filtration.
It is 8478m3/h that deduster of the present invention is processed air quantity, and dust purification efficient is higher than 99.8%, drag losses 800~1500Pa, and weight of equipment is 1.5 tons.According to the flue gas generating capacity situation of site of deployment, the effect in parallel of many dedusters can be installed, and according to the variation of flue gas generating capacity, the work number of units of control deduster.
Embodiment 2:
Present embodiment is applied to the coal-fired boiler in thermal power plant exhaust gas dust and purifies.
Such as Fig. 1~shown in Figure 3, a kind of locellus step-by-step movement is washed away from bag type dust-remover, comprises upper box 15, in the inside of upper box 15 locellus 17 that is formed by locellus dividing plate 4 is set, be provided with air inlet header 14 in the side of upper box 15, be provided with air inlet pipe 3 at an end of air inlet header 14; Be provided with air inlet window 5 between air inlet header 14 and each locellus 17, be provided with slide valve 2 at air inlet window 5, the top of slide valve 2 is connected with locellus 17 electromagnet 1 outward; Be provided with middle casing 16 below upper box 15, be provided with upper face plate 6 at the top of middle casing 16, be provided with lower face plate 9 in the bottom of middle casing 16, described upper and lower card has through hole 18, and the position of upper and lower card through hole 18 is corresponding one by one; Be provided with several filter bags 7 in the inside of middle casing 16, the described filter bag 7 two ends respectively through hole 18 corresponding with upper and lower card are connected; Be provided with the header 13 of giving vent to anger in the side of middle casing 16, be provided with the bar sealing 11 of giving vent to anger at the sidewall of middle casing 16, the header of giving vent to anger 13 is connected with middle casing 16 by the bar sealing 11 of giving vent to anger, and is provided with escape pipe 12 at an end of the described header 13 of giving vent to anger; Below middle casing 16, be provided with ash bucket 8, be provided with unloading valve 10 in the lower end of ash bucket 8.
Described locellus 17 quantity are 9, and the filter area of each locellus 17 is 376m2.
Described air inlet window 5 is circular.
Filter bag 7 quantity during the air quantity of processing is as required determined in the casing 16, filter bag 7 quantity in described each locellus 17 are 120, are of a size of φ 200x5000mm.
Described filter bag 7 materials are PTFE overlay film PPS Nomex.
One-time dedusting process below in conjunction with the description of drawings present embodiment:
Such as Fig. 1~shown in Figure 3, open a slide valve 2 by electromagnet 1, under the effect of air-introduced machine blast, the ash-laden gas that is entered by air inlet pipe 3 enters air inlet header 14, in the locellus 17 of the upper box 15 that the slide valve 2 that then enters and open is corresponding, dusty gas is flowed in the filter bag 7 of these locellus 17 correspondences by filter bag 7 upper port that are fixed on the upper face plate 6 under the poor promotion of stream pressure;
Dusty gas is in filter bag 7 interior flow process, small part gas is by flowing to filter bag 7 external spaces by filter bag 7 filter walls in the filter bag 7, most of gas flows along the axial top-down of filter bag 7, because dust-contained airflow is filtered walls and the resistance of filtering the dust layer on the wall along the resistance that filter bag 7 axial directions flow much smaller than radial penetration filter bag 7, so most gas will flow out from filter bag 7 lower port that are fixed on the lower face plate 9.Because entering the dusty gas flow of this locellus 17 filter bags 7 is that deduster is always processed flow, so dusty gas top-downly has larger axial wind speed when mobile in that filter bag 7 is interior, and axial flow must produce strong souring to filter bag 7 inwalls.Utilize high velocity air to the souring of filter bag 7 inwalls, the dust layer in the filter bag 7 of described locellus 17 correspondences is peeled off, described dust layer is to capture and be deposited on filter bag 7 inwalls when dusty gas is filtered;
In the dust layer fragment of being stripped from and the dusty gas larger granule dust together from be fixed on filter bag 7 lower port on casing 16 lower face plates 9 fall in the ash bucket 8, realize the ash-removal effect of the filter bag 7 of described locellus 17 correspondences;
Flow into remaining dusty gas of ash bucket 8 then under the promotion of pressure differential from lower face plate 9, flow into from bottom to top in the filter bag 7 of other locellus 17 by filter bag 7 lower port that are fixed on the lower face plate 9, gas is in the process that upwards flows, dust in the dusty gas is filtered and is deposited on filter bag 7 inner surfaces, clean gas is finished the filtration, purification to dusty gas by the bag external space that the filter bag wall enters middle casing 16;
Enter the header 13 of giving vent to anger by the clean gas that flows to 16 bags of external spaces of middle casing in the filter bag 7 through the bar sealing 11 of giving vent to anger, finally discharge by escape pipe 12;
Continuation is carried out deashing to the filter bag 7 of next locellus 17 correspondences, adopt step-by-step system to open the slide valve 2 of next locellus 17, and the slide valve 2 of other locellus 17 is in closed condition, keep having all the time the filter bag 7 of locellus 17 correspondences to be in the deashing duty, all the other locellus 17 filter bags 7 are in the filtration duty, form the orderly circulation of filter bag 7 deashings and filtration.
It is 22608m that each locellus of the present invention is processed air quantity 3/ h, it is 203472m that deduster is processed total blast volume 3/ h.Dust purification efficient is higher than 99.8%, drag losses 800~1500Pa, and weight of equipment is 20 tons.According to the flue gas generating capacity situation of site of deployment, the effect in parallel of many dedusters can be installed, and according to the variation of flue gas generating capacity, the work number of units of control deduster.

Claims (4)

1. a locellus step-by-step movement is washed away from bag type dust-remover, it is characterized in that comprising upper box, and the locellus that is formed by the locellus dividing plate is set in the inside of upper box, is provided with the air inlet header in the side of upper box, is provided with air inlet pipe at an end of air inlet header; Be provided with the air inlet window between air inlet header and each locellus, be provided with slide valve at the air inlet window, the top of slide valve is connected with upper box electromagnet outward; Be provided with middle casing below upper box, be provided with upper face plate at the top of middle casing, be provided with lower face plate in the bottom of middle casing, described upper and lower card has through hole, and the position of upper and lower card through hole is corresponding one by one; Be provided with several filter bags in the inside of middle casing, the described filter bag two ends respectively through hole corresponding with upper and lower card are connected; Side at middle casing is provided with the header of giving vent to anger, and is provided with the bar sealing of giving vent to anger at the sidewall of middle casing, and the header of giving vent to anger is connected with middle casing by the bar sealing of giving vent to anger, and is provided with escape pipe at an end of the described header of giving vent to anger; Below middle casing, be provided with ash bucket, be provided with unloading valve in the lower end of ash bucket.
2. locellus step-by-step movement according to claim 1 is washed away from bag type dust-remover, it is characterized in that described locellus quantity is 4 to 10.
3. locellus step-by-step movement according to claim 1 is washed away from bag type dust-remover, it is characterized in that described air inlet window is circle or rectangle.
4. adopt locellus step-by-step movement claimed in claim 1 to wash away dust collection method from bag type dust-remover, it is characterized in that specifically comprising the steps:
Step 1: open a slide valve by described electromagnet, make dusty gas carry out deashing to the dust layer on the filter bag of the corresponding locellus of described slide valve, the filter bag of other locellus carries out filtration, purification to dusty gas;
Step 2: open the slide valve of next locellus, close the slide valve of other locellus, continue the dust layer on filter bag corresponding to described locellus is carried out deashing, other locellus carry out filtration, purification to dusty gas; Remain that a filter bag corresponding to locellus is in the deashing duty, all the other locellus filter bags are in the filtration duty, form the orderly circulation of filter bag ash removal and filtration.
CN2012105796136A 2012-12-27 2012-12-27 Compartment stepping washing self-deashing bag-type dust remover and dust removing method Pending CN103055617A (en)

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Application Number Priority Date Filing Date Title
CN2012105796136A CN103055617A (en) 2012-12-27 2012-12-27 Compartment stepping washing self-deashing bag-type dust remover and dust removing method

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104069714A (en) * 2014-07-15 2014-10-01 云南大红山管道有限公司 Dust removing device for removing dust in factory iron ore
CN106492555A (en) * 2015-09-08 2017-03-15 浙江吉天环保科技有限公司 Self-cleaning deduster and its dedusting and ash removal method

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2282921Y (en) * 1996-07-25 1998-06-03 姜堰市环保设备厂 Chamber pulsating back-blowing big cloth bag dust remover
CN201040214Y (en) * 2007-04-30 2008-03-26 东北大学 Separated chamber pulsation ejection bag-type dust remover

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2282921Y (en) * 1996-07-25 1998-06-03 姜堰市环保设备厂 Chamber pulsating back-blowing big cloth bag dust remover
CN201040214Y (en) * 2007-04-30 2008-03-26 东北大学 Separated chamber pulsation ejection bag-type dust remover

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104069714A (en) * 2014-07-15 2014-10-01 云南大红山管道有限公司 Dust removing device for removing dust in factory iron ore
CN106492555A (en) * 2015-09-08 2017-03-15 浙江吉天环保科技有限公司 Self-cleaning deduster and its dedusting and ash removal method

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