CN105688522A - Dust removal filtering device and method - Google Patents
Dust removal filtering device and method Download PDFInfo
- Publication number
- CN105688522A CN105688522A CN201610143273.0A CN201610143273A CN105688522A CN 105688522 A CN105688522 A CN 105688522A CN 201610143273 A CN201610143273 A CN 201610143273A CN 105688522 A CN105688522 A CN 105688522A
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- Prior art keywords
- filter element
- tube sheet
- filter
- admission line
- gas
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- 239000000428 dust Substances 0.000 title claims abstract description 42
- 238000001914 filtration Methods 0.000 title claims abstract description 21
- 239000012065 filter cake Substances 0.000 claims description 19
- 238000010926 purge Methods 0.000 claims description 14
- 238000004140 cleaning Methods 0.000 claims description 8
- 238000010943 off-gassing Methods 0.000 claims description 6
- 238000002347 injection Methods 0.000 claims description 5
- 239000007924 injection Substances 0.000 claims description 5
- 238000003466 welding Methods 0.000 claims description 5
- 230000000875 corresponding Effects 0.000 claims description 3
- 239000007921 spray Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 5
- 238000011010 flushing procedure Methods 0.000 abstract 4
- 239000008187 granular material Substances 0.000 description 6
- 239000002245 particle Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000001771 impaired Effects 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 230000008929 regeneration Effects 0.000 description 3
- 238000011069 regeneration method Methods 0.000 description 3
- 238000004062 sedimentation Methods 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 230000004048 modification Effects 0.000 description 2
- 238000006011 modification reaction Methods 0.000 description 2
- 238000005453 pelletization Methods 0.000 description 2
- 230000001681 protective Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/0002—Casings; Housings; Frame constructions
- B01D46/0005—Mounting of filtering elements within casings, housings or frames
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/56—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition
- B01D46/58—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition connected in parallel
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/66—Regeneration of the filtering material or filter elements inside the filter
- B01D46/70—Regeneration of the filtering material or filter elements inside the filter by acting counter-currently on the filtering surface, e.g. by flushing on the non-cake side of the filter
- B01D46/71—Regeneration of the filtering material or filter elements inside the filter by acting counter-currently on the filtering surface, e.g. by flushing on the non-cake side of the filter with pressurised gas, e.g. pulsed air
Abstract
The invention discloses a dust removal filtering device and method. The dust removal filtering device comprises a shell, a tubular plate, at least one filtering element, an air inlet pipeline and a back flushing structure, wherein the shell is provided with an air inlet and an air outlet, the air inlet is formed in the lower end of the shell, and the air outlet is formed in the upper end of the shell; the tubular plate is provided with at least one through hole, arranged in the shell and located between the air inlet and the air outlet of the shell; the filtering element is arranged in the shell and located below the through hole of the tubular plate, and the upper end of the filtering element is fixed to the tubular plate; the air inlet pipeline penetrates through the air inlet of the shell and extends into the shell, and the air outlet of the air inlet pipeline is located below the tubular plate; the back flushing structure is arranged below the tubular plate, and the air outlet direction of the back flushing structure faces the through hole of the tubular plate. The dust removal filtering device is simple and reasonable in structure, the load of the filtering element can be effectively reduced, the reentrainment problem is effectively avoided in the back flushing process, dust removal efficiency of the dust removal filtering device is improved, and cost is reduced.
Description
Technical field
The present invention relates to the structure of dust removal and filtration and method design field, espespecially one dedusting filter and method。
Background technology
Increasing dust arrester tendency adopts a kind of on-line regeneration dust pelletizing system continuously at present, concrete manifestation form is, all filter elements are arranged in a big filter head housings body, and it is divided into several subregions, it is interconnected between subregion, and each subregion is furnished with independent blowback pipeline, when filter needs pulse cleaning, only a subregion being carried out blowback, other subregion carries out dust removal and filtration, carries out it is achieved thereby that filter with blowback simultaneously。
Compared with the dust pelletizing system of the many bins of tradition, the advantage of existing dust arrester is floor space and equipment valve quantity is all substantially reduced, and it is simple to control program。But, existing dust arrester still suffers from shortcoming, the mode from filter bottom air inlet is mostly adopted due to manufacturer, namely the airintake direction of gas to be filtered is from bottom to top, this can cause that filter is when blowback, the gas to be filtered that the dust filter cake that gravitational settling drops easily is raised is relied on to break up, and rise along with gas to be filtered and form reentrainment of dust, the dust particle risen quickly returns to again formation filter cake on filter element, thus causing filter recoil regeneration effect poor, filtration pressure difference remains high, the problem that blowback is frequent and air consumption is big, also result in filter element blocking。When dust relatively low especially for density, that particle diameter is less is filtered, the phenomenon of reentrainment of dust becomes apparent from。
Therefore, the applicant is devoted to provide a kind of novel dedusting filter and method。
Summary of the invention
It is an object of the invention to provide a kind of dedusting filter and method, wherein dedusting filter simple in construction, reasonable in design, can effectively reduce the load of filter element, reduce the frequency that filter element is carried out blowback further, reduce blowback air consumption, and the problem that effectively prevent reentrainment of dust in blowback process, thus being effectively improved the efficiency of dust collection of dedusting filter, optimizing dust removing effects, reducing dedusting cost。
For solving above-mentioned technical problem, the invention provides a kind of dedusting filter, including: housing, described housing is provided with air inlet and gas outlet, and described air inlet is arranged on the bottom of described housing, and described gas outlet is arranged on the upper end of described housing；Tube sheet, described tube sheet is provided with at least one through hole, and described tube sheet is arranged on described enclosure interior, and between the air inlet and gas outlet of described housing；At least one filter element, described filter element is arranged on described enclosure interior and is positioned at the lower section of through hole of described tube sheet, and its upper end is fixed on described tube sheet；Admission line, described admission line extends in described housing through the air inlet of described housing, and the gas outlet of described admission line is positioned at the lower section of described tube sheet；Backflow structure, described backflow structure is arranged on the top of described tube sheet, and the outgassing direction of described backflow structure is towards the through hole of described tube sheet。
Preferably, described backflow structure includes a total pipeline and at least one sub-pipes, described sub-pipes is fixed on described total pipeline and connects with described total pipeline, and the winding-up mouth of described sub-pipes is towards the through hole on described tube sheet, and is equipped with a valve on each described sub-pipes。
Preferably, corresponding one of each described sub-pipes filters subregion, and each described sub-pipes is provided with at least one winding-up mouth, and the lower section of each described winding-up mouth is correspondingly provided with at least one described filter element。
Preferably, described dedusting filter also includes: at least one anti-wear sleeve pipe, and described anti-wear casing pipe sleeve is located on described filter element, and is positioned at the upper end of described filter element。
Preferably, the height of described anti-wear sleeve pipe is equal to or more than the distance between upper surface and the lower surface of described tube sheet of described admission line；And/or；Internal diameter 2～the 5mm bigger than the external diameter of described filter element of described anti-wear sleeve pipe；And/or；Described anti-wear sleeve pipe is fixed on described tube sheet by welding or Flange joint。
Preferably, the upper end of described admission line is fixed on described tube sheet by a connection piece。
Preferably, just center to described tube sheet, the gas outlet of described admission line；And/or；2～3 times of the diameter that spacing is described admission line between upper surface and the lower surface of described tube sheet of described admission line。
Preferably, the lower surface of described filter element is positioned at the top of the air inlet of described housing；Or；The number of described filter element is multiple, and multiple described filter element is distributed on the surrounding of described admission line。
Preferably, the distance between lower surface and the air inlet of described housing of described filter element is 500～1000mm。
The invention also discloses a kind of dust removal and filtration method, described dust removal and filtration method is applied to above-mentioned dedusting filter, including step:
S10: make gas to be filtered from top to bottom by described filter element；
S20: described filter element filters described gas to be filtered, obtains clean gas, and forms filter cake on the surface of described filter element；
S30: discharge described clean gas；
S40: spray purge gas to described filter element, and the injection direction of described purge gas is from top to bottom, described purge gas blows off the filter cake of described filter element surface。
The dedusting filter of the present invention and method can realize following at least one beneficial effect:
1, the dedusting filter of the present invention is by ingenious layout admission line, gas to be filtered is made to pass through filter element from top to bottom, owing to the gas to be filtered circulating direction on filter element is identical with dust gravitational settling direction, therefore gas Midst density to be filtered or the bigger granule of granularity need not move through filter element and are directly deposited in the bottom of housing, additionally, gas Midst density to be filtered or the less granule of particle diameter are trapped within filter element surface and form filter cake, thus realizing the gas solid separation of gas to be filtered, the load that can effectively reduce filter element is so set, thus reducing the maintenance cost of filter element；
2, when the dedusting filter of the present invention needs that filter element is carried out backwash, blowback air is sprayed to filter element by backflow structure, owing to the outgassing direction of backflow structure is arranged on below the through hole of tube sheet towards tube sheet through hole and filter element, therefore the injection direction of blowback air is consistent with the circulating direction of gas to be filtered, thus accelerating the sedimentation of filter cake, gas to be filtered and the inconsistent filter cake breaing up filter element surface of blowback air circulating direction can also be prevented effectively from, effectively prevent the phenomenon of reentrainment of dust further；
3, in the dedusting filter of the present invention, the sub-pipes in backflow structure is correspondingly provided with a filter element or multiple filter element, the filter element of one sub-pipes and correspondence thereof is a subregion, namely a subregion can include one or more filter element, and when needing blowback, only a subregion can be carried out blowback, multiple subregions can also be carried out blowback, the application flexibility of the dedusting filter that can effectively promote the present invention is so set；
4, in the dedusting filter of the present invention, the upper end of filter element is provided with anti-wear sleeve pipe, owing to the gas flow rate to be filtered at the gas outlet place of admission line is big and dust concentration is high, therefore filter element is very easily impaired near the upper end of admission line, and the gas to be filtered abrasion to filter element can be prevented effectively from by arranging an anti-wear sleeve pipe, thus effectively extending the service life of filter element；
5, in the dedusting filter of the present invention, the height of anti-wear sleeve pipe is not less than the distance between the upper surface of admission line and the lower surface of tube sheet; its internal diameter is more than the external diameter of filter element; and anti-wear sleeve pipe is by welding or Flange joint is fixed on tube sheet; these arrange the installation steadiness that all can effectively promote anti-wear sleeve pipe, improve its protective effect to filter element further；
6, the dust removal and filtration method step of the present invention is simple, by making gas to be filtered pass through filter element from top to bottom, thus effectively reducing the load of filter element, again through making purge gas blowback filter element from top to bottom, thus avoiding due to the gas to be filtered phenomenon that cause filter cake dispelled contrary to purge gas circulating direction, further avoid reentrainment of dust phenomenon。
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail:
Fig. 1 is the structural representation of a kind of specific embodiment of the dust removal by filtration device of the present invention。
Drawing reference numeral illustrates:
Housing 10, air inlet 11, gas outlet 12；Tube sheet 20；Filter element 30；Admission line 40；Backflow structure 50, total pipeline 51, sub-pipes 52, valve 53；Anti-wear sleeve pipe 60；Connector 70；First direction A, second direction B, third direction C。
Detailed description of the invention
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, the accompanying drawing used required in embodiment or description of the prior art will be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the premise not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings。
Embodiment one
Embodiment one discloses a kind of dedusting filter, including: housing, housing is provided with air inlet and gas outlet, and air inlet is arranged on the bottom of housing, and gas outlet is arranged on the upper end of housing；Tube sheet, tube sheet is provided with at least one through hole, and tube sheet is arranged on described enclosure interior, and between the air inlet and gas outlet of housing；At least one filter element, filter element is arranged on enclosure interior and is positioned at the lower section of through hole of tube sheet, and its upper end is fixed on tube sheet；Admission line, admission line extends in housing through the air inlet of housing, and the gas outlet of admission line is positioned at the lower section of tube sheet；Backflow structure, backflow structure is arranged on the top of tube sheet, and the outgassing direction of backflow structure is towards the through hole of tube sheet。
The dedusting filter of the present invention is by ingenious layout admission line, gas to be filtered is made to pass through filter element from top to bottom, owing to the gas to be filtered circulating direction on filter element is identical with dust gravitational settling direction, therefore gas Midst density to be filtered or the bigger granule of granularity need not move through filter element and are directly deposited in the bottom of housing；It addition, gas Midst density to be filtered or the less granule of particle diameter are trapped within filter element surface forms filter cake, thus realizing the gas solid separation of gas to be filtered, the load that can effectively reduce filter element is so set, thus avoiding the maintenance cost of filter element。
When the dedusting filter of the present invention needs that filter element is carried out backwash, blowback air is sprayed to filter element by backflow structure, owing to the outgassing direction of backflow structure is arranged on below the through hole of tube sheet towards tube sheet through hole and filter element, therefore the injection direction of blowback air is consistent with the circulating direction of gas to be filtered, thus accelerating the sedimentation of filter cake, gas to be filtered and the inconsistent filter cake breaing up filter element surface of blowback air circulating direction can also be prevented effectively from, and then effectively prevent the phenomenon of reentrainment of dust。
Embodiment two
Compared to embodiment one, theing improvement is that of embodiment two, the backflow structure in dedusting filter disclosed in embodiment two includes a total pipeline and multiple sub-pipes, sub-pipes is fixed on total pipeline and connects with total pipeline, each sub-pipes has a winding-up mouth, winding-up mouth is towards the through hole on tube sheet, and is equipped with a valve on each sub-pipes。Concrete, it is correspondingly provided with a filter element below each winding-up mouth of sub-pipes。
In dedusting filter in the present embodiment, the sub-pipes in backflow structure is correspondingly provided with a filter element, the filter element of one sub-pipes and correspondence thereof is a subregion, and when needing blowback, only a subregion can be carried out blowback, multiple subregions can also be carried out blowback, the application flexibility of the dedusting filter that can effectively promote the present invention is so set。
Certainly, in other embodiments, backflow structure can only include a sub-pipes；One sub-pipes can arrange multiple winding-up mouth；And multiple filter element can also be correspondingly arranged below each winding-up mouth of sub-pipes。
Embodiment three
Compared to embodiment one, theing improvement is that of embodiment three, dedusting filter disclosed in embodiment three also includes: multiple anti-wear sleeve pipes, and anti-wear casing pipe sleeve is located on filter element, and is positioned at the upper end of filter element。
Concrete, the height of anti-wear sleeve pipe is equal to the distance between upper surface and the lower surface of tube sheet of admission line；Internal diameter 2～the 5mm bigger than the external diameter of filter element of anti-wear sleeve pipe；Anti-wear sleeve pipe is fixed on tube sheet by Flange joint, so arranges the installation steadiness that can effectively promote anti-wear sleeve pipe, improves its protective effect to filter element further。
Owing to the gas flow rate to be filtered at the gas outlet place of admission line is big and dust concentration is high, therefore filter element is very easily impaired near the upper end of admission line, and can be prevented effectively from the impaired of filter element by arranging an anti-wear sleeve pipe, thus extending its service life。
Certainly, in other embodiments, the height of anti-wear sleeve pipe can also more than the distance between the upper surface of admission line and the lower surface of tube sheet；Anti-wear sleeve pipe can also be fixed by welding on tube sheet。
Embodiment four
Compared to embodiment one, theing improvement is that of embodiment four, in the dedusting filter disclosed in embodiment four, the upper end of admission line is fixed on tube sheet by a connection piece, and connector herein can be pull bar。It is more firm that the installation that can make admission line is so set, thus improve the structural stability that device is overall。
Concrete, just center to tube sheet, the gas outlet of admission line, so arrange and the gas to be filtered in admission line can be made to pass through filter element with being more uniformly distributed；2～3 times of the diameter that spacing is admission line between upper surface and the lower surface of tube sheet of admission line。
Concrete, the lower surface of filter element is positioned at the top of the air inlet of housing, and the distance between the lower surface of filter element and the air inlet of housing is 500～1000mm, and the number of filter element is multiple, and multiple filter element is distributed on the surrounding of admission line。
Certainly in other embodiments, the connector between admission line and tube sheet can be rigid connector, such as pull bar etc., or flexible connecting member, such as stay cord etc.；Not necessarily just center to tube sheet, the gas outlet of admission line；The distance between distance and filter element and the air inlet of housing between admission line and tube sheet all can be adjusted according to Practical Project；Filter element can also be non-uniformly distributed as required around admission line。
Embodiment five
As shown in Figure 1, embodiment five is the one comparatively preferred embodiment of the dedusting filter of the present invention, including: housing 10, housing 10 is provided with air inlet 11 and gas outlet 12, air inlet 11 is arranged on the bottom of housing 10, and gas outlet 12 is arranged on the upper end of housing 10；Tube sheet 20, tube sheet 20 is provided with multiple through hole, and it is internal that tube sheet 20 is arranged on housing 10, and between the air inlet 11 and gas outlet 12 of housing 10；Multiple filter elements 30, it is internal and be positioned at the lower section of through hole of tube sheet 20 that filter element 30 is arranged on housing 10, and its upper end is fixed on tube sheet 20；Admission line 40, admission line 40 extends in housing 10 through the air inlet 11 of housing 10, and the gas outlet 12 of admission line 40 is positioned at the lower section of tube sheet 20；Backflow structure 50, backflow structure 50 is arranged on the top of tube sheet 20, and the outgassing direction of backflow structure 50 is towards the through hole of tube sheet。
Concrete, backflow structure 50 includes a total pipeline 51 and multiple sub-pipes 52, corresponding one of each sub-pipes filters subregion, sub-pipes 52 is fixed on total pipeline 51 and connects with total pipeline 51, the winding-up mouth of sub-pipes 52 is towards the through hole on tube sheet 20, and each sub-pipes 52 is equipped with a valve 53, and below the winding-up mouth of a sub-pipes 52, it is correspondingly provided with a filter element 30。
Concrete, dedusting filter also includes multiple anti-wear sleeve pipe 60, and anti-wear sleeve pipe 60 is set on filter element 30, and is positioned at the upper end of filter element 30, and in the present embodiment, each filter element 30 is equipped with an anti-wear sleeve pipe 60。
Concrete, the height of anti-wear sleeve pipe 60 is equal to the distance between upper surface and the lower surface of tube sheet 20 of admission line 40；Internal diameter 2～the 5mm bigger than the external diameter of filter element 30 of anti-wear sleeve pipe 60；Anti-wear sleeve pipe 60 is fixed by welding on tube sheet 20。
Concrete, the upper end of admission line 40 is fixed on tube sheet 20 by a connection piece 70, and just center to tube sheet 20, the gas outlet of admission line 40,2～3 times of the diameter that spacing is admission line 40 between upper surface and the lower surface of tube sheet 20 of admission line 40。
Concrete, the lower surface of filter element 30 is positioned at the top of the air inlet 11 of housing 10, concrete, and the distance between lower surface and the air inlet of housing 10 of filter element 30 is 500～1000mm, and filter element 30 is distributed on the surrounding of admission line 40。
The following is the specific embodiment of the dust removal and filtration method of the present invention。
The invention also discloses a kind of dust removal and filtration method, it is applied to the dedusting filter in any of the above-described embodiment, including step:
S10: make gas to be filtered pass through filter element from top to bottom；
S20: filter element filters gas to be filtered, obtains clean gas, and forms filter cake on the surface of filter element；
S30: discharge clean gas；
S40: spray purge gas to filter element, and the injection direction of purge gas is from top to bottom, purge gas blows off the filter cake of filter element surface。
The dust removal and filtration method step of the present invention is simple, by making gas to be filtered pass through filter element from top to bottom, thus effectively reducing the load of filter element, again through make purge gas from top to bottom blow filter element, thus avoiding, gas to be filtered is contrary with purge gas circulating direction causes filter cake to be dispelled, and further avoid reentrainment of dust phenomenon
Exemplary, as it is shown in figure 1, the concrete applicable cases of the embodiment five of the dedusting filter of the present invention is as follows:
Gas to be filtered A along a first direction enters in housing 10 from admission line 40, owing to the gas outlet of admission line 40 is positioned at below tube sheet 20, under the stop of tube sheet 20, gas to be filtered is from top to bottom by filter element 30, owing to the gas to be filtered circulating direction on filter element is identical with dust gravitational settling direction, therefore gas Midst density to be filtered or the bigger granule of granularity need not move through filter element 30 and are directly deposited in the bottom of housing 10；Additionally, gas Midst density to be filtered or the less granule of particle diameter are trapped within the surface of filter element 30 and form filter cake, thus realizing the gas solid separation of gas to be filtered, the clean gas obtained is discharged along second direction B from the gas outlet 12 of housing 10, so can effectively reduce the load of filter element 30, thus avoiding the maintenance cost of filter element 30。
When needing that filter element 30 is carried out backwash, purge gas enters in the main pipeline 51 of backflow structure 50 along third direction, owing to the winding-up mouth of sub-pipes 52 is arranged on below the through hole of tube sheet 20 towards the through hole on tube sheet 20 and filter element 30, therefore to blow the direction of filter element 30 consistent by the circulating direction of filter element 30 with gas to be filtered for blowback Air Reverse, this sedimentation being possible not only to accelerate filter cake, gas to be filtered and the inconsistent filter cake breaing up filter element 30 surface of blowback air circulating direction can also be prevented effectively from, thus effectively prevent the phenomenon of reentrainment of dust。
And, dedusting filter in the present embodiment can only open the valve 53 on a sub-pipes 52 in blowback process, then the filter element 30 of its correspondence is carried out blowback, the valve 53 on two or more sub-pipes 52 can also be opened simultaneously, then the filter element 30 of its correspondence is carried out blowback。
The dedusting filter of the present invention is simple and reasonable, can effectively reduce the load of filter element, reduce further the frequency that filter element is carried out blowback, decrease the air consumption in blowback process, and the problem that effectively prevent reentrainment of dust in blowback process, reduces the pressure reduction of filter element, thus it is effectively ensured the regeneration effect of dedusting filter, improve efficiency of dust collection, reduce dedusting cost。
The above is only the preferred embodiment of the present invention; it should be pointed out that, for those skilled in the art, under the premise without departing from the principles of the invention; can also making some improvements and modifications, these improvements and modifications also should be regarded as protection scope of the present invention。
Claims (10)
1. a dedusting filter, it is characterised in that including:
Housing, described housing is provided with air inlet and gas outlet, and described air inlet is arranged on the bottom of described housing, and described gas outlet is arranged on the upper end of described housing；
Tube sheet, described tube sheet is provided with at least one through hole, and described tube sheet is arranged on described enclosure interior, and between the air inlet and gas outlet of described housing；
At least one filter element, described filter element is arranged on described enclosure interior and is positioned at the lower section of through hole of described tube sheet, and its upper end is fixed on described tube sheet；
Admission line, described admission line extends in described housing through the air inlet of described housing, and the gas outlet of described admission line is positioned at the lower section of described tube sheet；
Backflow structure, described backflow structure is arranged on the top of described tube sheet, and the outgassing direction of described backflow structure is towards the through hole of described tube sheet。
2. dedusting filter as claimed in claim 1, it is characterised in that:
Described backflow structure includes a total pipeline and at least one sub-pipes, described sub-pipes is fixed on described total pipeline and connects with described total pipeline, the winding-up mouth of described sub-pipes is towards the through hole on described tube sheet, and is equipped with a valve on each described sub-pipes。
3. dedusting filter as claimed in claim 2, it is characterised in that:
Corresponding one of each described sub-pipes filters subregion, and each described sub-pipes is provided with at least one winding-up mouth, and the lower section of each described winding-up mouth is correspondingly provided with at least one described filter element。
4. dedusting filter as claimed in claim 1, it is characterised in that also include:
At least one anti-wear sleeve pipe, described anti-wear casing pipe sleeve is located on described filter element, and is positioned at the upper end of described filter element。
5. dedusting filter as claimed in claim 4, it is characterised in that:
The height of described anti-wear sleeve pipe is equal to or more than the distance between upper surface and the lower surface of described tube sheet of described admission line；
And/or；
Internal diameter 2～the 5mm bigger than the external diameter of described filter element of described anti-wear sleeve pipe；
And/or；
Described anti-wear sleeve pipe is fixed on described tube sheet by welding or Flange joint。
6. dedusting filter as claimed in claim 1, it is characterised in that:
The upper end of described admission line is fixed on described tube sheet by a connection piece。
7. dedusting filter as claimed in claim 1, it is characterised in that:
Just center to described tube sheet, the gas outlet of described admission line；
And/or；
2～3 times of the diameter that spacing is described admission line between upper surface and the lower surface of described tube sheet of described admission line。
8. the dedusting filter as described in any one of claim 1 to 7, it is characterised in that:
The lower surface of described filter element is positioned at the top of the air inlet of described housing；
Or；
The number of described filter element is multiple, and multiple described filter element is distributed on the surrounding of described admission line。
9. dedusting filter as claimed in claim 8, it is characterised in that:
Distance between lower surface and the air inlet of described housing of described filter element is 500～1000mm。
10. a dust removal and filtration method, it is characterised in that described dust removal and filtration method is applied to the dedusting filter according to any one of claim 1 to 9, including step:
S10: make gas to be filtered from top to bottom by described filter element；
S20: described filter element filters described gas to be filtered, obtains clean gas, and forms filter cake on the surface of described filter element；
S30: discharge described clean gas；
S40: spray purge gas to described filter element, and the injection direction of described purge gas is from top to bottom, described purge gas blows off the filter cake of described filter element surface。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610143273.0A CN105688522B (en) | 2016-03-14 | 2016-03-14 | A kind of dedusting filter and method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610143273.0A CN105688522B (en) | 2016-03-14 | 2016-03-14 | A kind of dedusting filter and method |
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| Publication Number | Publication Date |
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| CN105688522A true CN105688522A (en) | 2016-06-22 |
| CN105688522B CN105688522B (en) | 2018-01-12 |
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|---|---|
| CN105688522B (en) | 2018-01-12 |
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