CN205412488U - Dedusting filter device - Google Patents

Abstract

The utility model discloses a dust removal filtering device, which comprises: a housing provided with an air inlet and an air outlet, the air inlet is arranged at the lower end of the housing, and the air outlet is arranged at the upper end of the housing; There is at least one through hole on the plate, and the tube plate is arranged inside the shell, and is located between the air inlet and the air outlet of the shell; at least one filter element, the filter element is set inside the shell, and is located in the through hole of the tube plate Below, the upper end of which is fixed on the tube sheet; the air intake pipe, the air intake pipe extends through the air inlet of the shell into the shell, and the air outlet of the air intake pipe is located below the tube plate; the air intake pipe arranged above the tube plate Back blowing structure, the air outlet direction is towards the through hole of the tube sheet. The dust removal filter device of the utility model has a simple and reasonable structure, can effectively reduce the load of filter elements, and effectively avoids the problem of secondary dust raising during the back blowing process, thereby improving the dust removal efficiency of the dust removal filter device and reducing costs.

Description

A dust filter device

technical field

The utility model relates to the structural design technical field of dust removal and filtration, in particular to a dust removal and filtration device.

Background technique

At present, more and more dust removal devices tend to adopt a continuous online regenerative dust removal system. The specific form is that all filter elements are installed in a large filter housing and divided into several partitions, which are connected to each other. And each partition is equipped with a separate back-flushing pipeline. When the filter needs to be back-flushed and regenerated, only one partition is back-flushed, and the other partitions are dust-removed and filtered, thereby achieving simultaneous filtering and back-flushing.

Compared with the traditional multi-chamber dust removal system, the advantages of the existing dust removal device are that the floor area and the number of equipment valves are greatly reduced, and the control program is simple. However, there are still shortcomings in the existing dust removal device, because most manufacturers adopt the way of air intake from the bottom of the filter, that is, the air intake direction of the gas to be filtered is from bottom to top, which will cause the filter to rely on The falling dust filter cake is easily broken up by the rising gas to be filtered, and forms secondary dust with the rising of the gas to be filtered, and the rising dust particles quickly return to the filter element to form a filter cake, thus causing the filter Poor backflush regeneration effect, high filter pressure difference, frequent backflush and large air consumption will also lead to blockage of filter elements. Especially when filtering dust with low density and small particle size, the phenomenon of secondary dust is more obvious.

Therefore, the applicant is devoting himself to providing a novel dust removal and filtering device.

Utility model content

The purpose of this utility model is to provide a dust removal filter device, wherein the dust removal filter device has a simple structure and a reasonable design, which can effectively reduce the load on the filter element, further reduce the frequency of back blowing to the filter element, reduce the air consumption of back blowing, and In the back blowing process, the problem of secondary dust raising is effectively avoided, thereby effectively improving the dust removal efficiency of the dust removal filter device, optimizing the dust removal effect, and reducing the dust removal cost.

In order to solve the above-mentioned technical problems, the utility model provides a dust removal and filtering device, comprising: a housing, the housing is provided with an air inlet and an air outlet, and the air inlet is arranged at the lower end of the housing , the air outlet is arranged on the upper end of the shell; the tube plate is provided with at least one through hole, the tube plate is set inside the shell, and is located at the inlet of the shell Between the air port and the air outlet; at least one filter element, the filter element is arranged inside the housing and below the through hole of the tube sheet, and its upper end is fixed on the tube sheet; the air inlet pipe , the air inlet pipe extends into the housing through the air inlet of the housing, and the air outlet of the air inlet pipe is located below the tube sheet; the back blowing structure, the back blowing structure is arranged on Above the tube sheet, the air outlet direction of the back blowing structure faces the through hole of the tube sheet.

Preferably, the backflushing structure includes a main pipeline and at least one sub-pipe, the sub-pipe is fixed on the main pipeline and communicates with the main pipeline, and the injection port of the sub-pipe faces the tube plate through holes, and each of the sub-pipes is provided with a valve.

Preferably, each of the sub-pipes corresponds to a filtering section, and each of the sub-pipes is provided with at least one blowing port, and at least one of the filter elements is correspondingly provided below each of the blowing ports. .

Preferably, the dust removal and filtering device further includes: at least one wear-resistant sleeve, the wear-resistant sleeve is sleeved on the filter element and located at the upper end of the filter element.

Preferably, the height of the anti-wear sleeve is equal to or greater than the distance between the upper end surface of the intake pipe and the lower end surface of the tube sheet; and/or; the inner diameter of the anti-wear sleeve is greater than the The outer diameter of the filter element is 2-5 mm larger; and/or; the anti-wear sleeve is fixed on the tube sheet by welding or flange connection.

Preferably, the upper end of the intake pipe is fixed on the tube sheet through a connecting piece.

Preferably, the air outlet of the air inlet pipe is facing the center of the tube sheet; and/or; the distance between the upper end surface of the air inlet pipe and the lower end surface of the tube sheet is 2 to 3 times the diameter of the

Preferably, the lower end surface of the filter element is located above the air inlet of the housing; or; the number of the filter elements is multiple, and a plurality of the filter elements are evenly distributed on the inlet pipe around.

Preferably, the distance between the lower end surface of the filter element and the air inlet of the housing is 500-1000mm.

The dust removal filter device of the present utility model can realize at least one of the following beneficial effects:

1. The dust removal and filtering device of the present utility model arranges the intake pipe cleverly so that the gas to be filtered passes through the filter element from top to bottom. The particles with medium density or large particle size do not need to pass through the filter element and directly settle at the bottom of the housing. In addition, the particles with medium density or small particle size in the gas to be filtered are trapped on the surface of the filter element to form a filter cake, thereby realizing the Gas-solid separation of gas, this setting can effectively reduce the load on the filter element, thereby reducing the maintenance cost of the filter element;

2. When the dust removal and filtering device of the present invention needs to backwash the filter element, the blowback air is sprayed to the filter element through the backflush structure, because the air outlet direction of the backflush structure is toward the through hole of the tube plate and the filter element is arranged on the tube plate. Below the through hole, so the injection direction of the blowback air is consistent with the flow direction of the gas to be filtered, thereby accelerating the settlement of the filter cake, and can effectively avoid the inconsistency of the flow direction of the gas to be filtered and the blowback air to break up the filter cake on the surface of the filter element , to further effectively avoid the phenomenon of secondary dust;

3. The sub-pipelines in the backflushing structure of the dust removal filter device of the present utility model are correspondingly provided with one filter element or multiple filter elements, and one sub-pipeline and its corresponding filter elements are a partition, that is, a partition may include one or more Multiple filter elements, and when back-blowing is required, only one partition can be back-blown, and multiple partitions can be back-blown, so that the setting can effectively improve the application flexibility of the dust removal filter device of the present utility model;

4. The upper end of the filter element in the dust removal filter device of the present utility model is provided with an anti-wear sleeve. Since the gas to be filtered at the air outlet of the air inlet pipe has a large flow rate and a high dust concentration, the filter element is close to the upper end of the air inlet pipe. The part is extremely easy to be damaged, and by setting an anti-wear sleeve, it can effectively avoid the wear of the filter element by the gas to be filtered, thereby effectively prolonging the service life of the filter element;

5. The height of the wear-resistant casing in the dust removal and filtering device of the present invention is not less than the distance between the upper end surface of the intake pipe and the lower end surface of the tube plate, and its inner diameter is larger than the outer diameter of the filter element, and the wear-resistant sleeve passes through Welding or flange connection is fixed on the tube plate. These settings can effectively improve the installation stability of the anti-wear sleeve and further improve its protection effect on the filter element.

Description of drawings

Below in conjunction with accompanying drawing and specific embodiment the utility model is described in further detail:

Fig. 1 is a schematic structural view of a specific embodiment of the filter and dust removal device of the present invention.

Explanation of reference numbers:

Shell 10, air inlet 11, air outlet 12; tube plate 20; filter element 30; air inlet pipe 40; blowback structure 50, main pipe 51, sub-pipe 52, valve 53; wear-resistant sleeve 60; connectors 70; the first direction A, the second direction B, and the third direction C.

detailed description

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are only some embodiments of the utility model, and those skilled in the art can also obtain other drawings based on these drawings without creative work.

Embodiment one

Embodiment 1 discloses a dust removal and filtering device, comprising: a casing, an air inlet and an air outlet are arranged on the casing, the air inlet is arranged at the lower end of the casing, and the air outlet is arranged at the upper end of the casing; A plate, the tube plate is provided with at least one through hole, the tube plate is arranged inside the shell, and is located between the air inlet and the air outlet of the shell; at least one filter element, the filter element is arranged inside the shell and is located Below the through hole of the tube sheet, its upper end is fixed on the tube sheet; the air intake pipe extends through the air inlet of the shell to the inside of the shell, and the air outlet of the air intake pipe is located below the tube plate; The blowing structure and the back blowing structure are arranged above the tube sheet, and the air outlet direction of the back blowing structure faces the through hole of the tube sheet.

The dust removal and filtering device of the utility model arranges the intake pipe skillfully so that the gas to be filtered passes through the filter element from top to bottom. Or particles with a larger particle size do not need to pass through the filter element and directly settle at the bottom of the housing; in addition, particles with a smaller density or particle size in the gas to be filtered are trapped on the surface of the filter element to form a filter cake, thereby realizing the filtration of the gas to be filtered. Gas-solid separation, this setting can effectively reduce the load on the filter element, thereby avoiding the maintenance cost of the filter element.

When the dust removal filter device of the present invention needs to backwash the filter element, the blowback air is sprayed to the filter element through the blowback structure, because the air outlet direction of the blowback structure is towards the through hole of the tube plate and the filter element is arranged in the through hole of the tube plate Therefore, the injection direction of the back-blowing air is consistent with the flow direction of the gas to be filtered, thereby accelerating the settlement of the filter cake, and can effectively avoid the inconsistency of the flow direction of the gas to be filtered and the back-blowing air to break up the filter cake on the surface of the filter element, thereby Effectively avoid the phenomenon of secondary dust

Embodiment two

Compared with embodiment one, the improvement of embodiment two is that the blowback structure in the dust removal and filtering device disclosed in embodiment two includes a main pipeline and a plurality of sub-pipes, and the sub-pipes are fixed on the main pipeline and connected with the main pipeline. Each sub-pipe is provided with an injection port, the injection port of the sub-pipe faces the through hole on the tube plate, and each sub-pipe is provided with a valve. Specifically, a filter element is correspondingly provided below the blowing port of each sub-pipe.

The sub-pipe in the back-blowing structure of the dust removal filter device of the present utility model is correspondingly provided with a filter element, and a sub-pipe and its corresponding filter element are a partition, and when back-blowing is required, only one partition can be back-blown, It is also possible to perform back blowing on multiple partitions, which can effectively improve the application flexibility of the dust removal filter device of the present utility model.

Certainly, in other embodiments, the backflushing structure may only include one sub-pipe, and each sub-pipe may be provided with a plurality of blowing ports, and a plurality of filter elements may be correspondingly arranged under each blowing port.

Embodiment Three

Compared with the first embodiment, the improvement of the third embodiment is that the dust removal and filtering device disclosed in the third embodiment also includes: a plurality of wear-resistant sleeves, the wear-resistant sleeves are set on the filter element, and are located on the filter element upper end.

Specifically, the height of the anti-wear sleeve is equal to the distance between the upper end surface of the intake pipe and the lower end surface of the tube sheet; the inner diameter of the anti-wear sleeve is 2 to 5 mm larger than the outer diameter of the filter element; The blue connection is fixed on the tube plate, which can effectively improve the installation stability of the anti-wear sleeve and further improve its protection effect on the filter element.

Due to the high flow rate and high dust concentration of the gas to be filtered at the air outlet of the intake pipe, the upper end of the filter element near the intake pipe is easily damaged, and the damage to the filter element can be effectively avoided by setting an anti-wear sleeve , thereby prolonging its service life.

Of course, in other embodiments, the height of the anti-wear sleeve can also be greater than the distance between the upper end surface of the intake pipe and the lower end surface of the tube sheet; the anti-wear sleeve can also be fixed on the tube sheet by welding.

Embodiment Four

Compared with Embodiment 1, the improvement of Embodiment 4 is that the upper end of the air intake pipe in the dust removal and filtering device disclosed in Embodiment 4 is fixed on the tube sheet through a connecting piece, where the connecting piece can be a tie rod . Such setting can make the installation of the air intake pipe more stable, thereby improving the overall structural stability of the device.

Concretely, the air outlet of the air inlet pipe is facing the center of the tube sheet, so that the gas to be filtered in the air inlet pipe can pass through the filter element more evenly; The spacing is 2 to 3 times the diameter of the intake pipe.

Specifically, the lower end surface of the filter element is located above the air inlet of the housing, and the distance between the lower end surface of the filter element and the air inlet of the housing is 500-1000mm, and the number of filter elements is multiple, and the number of multiple Filter elements are evenly distributed around the intake pipe.

Of course, in other embodiments, the connection between the intake pipe and the tube sheet can be a rigid connection, such as a tie rod, or a flexible connection, such as a pull rope, etc.; the air outlet of the intake pipe does not necessarily face the tube sheet center; the distance between the air inlet pipe and the tube plate and the distance between the filter element and the air inlet of the shell can be adjusted according to the actual project; the filter element can also be distributed non-uniformly around the air inlet pipe as required .

Embodiment five

As shown in Figure 1, the fifth embodiment is a more preferred embodiment of the dust removal and filtering device of the present utility model, including: a housing 10, which is provided with an air inlet 11 and an air outlet 12, and the air inlet 11 is set at the lower end of the shell 10, and the air outlet 12 is set at the upper end of the shell 10; the tube plate 20, the tube plate 20 is provided with a plurality of through holes, the tube plate 20 is set inside the shell 10, and is located in the shell Between the air inlet 11 and the air outlet 12 of the body 10; a plurality of filter elements 30, the filter elements 30 are arranged inside the housing 10 and below the through holes of the tube sheet 20, and their upper ends are fixed on the tube sheet 20; The air intake duct 40, the air intake duct 40 extends into the housing 10 through the air inlet 11 of the housing 10, the air outlet 12 of the air intake duct 40 is located below the tube sheet 20; the back blowing structure 50, the back blowing structure 50 It is arranged above the tube plate 20, and the air outlet direction of the back blowing structure 50 faces the through hole of the tube plate.

Specifically, the blowback structure 50 includes a main pipeline 51 and a plurality of sub-pipes 52, the sub-pipes 52 are fixed on the main pipeline 51 and communicate with the main pipeline 51, the gas outlets of the sub-pipes 52 face the through holes on the tube sheet 20, and Each sub-pipe 52 is provided with a valve 53 , and a filter element 30 is correspondingly provided under the air outlet of one sub-pipe 52 .

Specifically, the dust filter device also includes a plurality of wear-resistant sleeves 60, which are sleeved on the filter element 30 and located at the upper end of the filter element 30, and in this embodiment, each filter element 30 An anti-wear sleeve 60 is provided on each.

Specifically, the height of the anti-wear sleeve 60 is equal to the distance between the upper end surface of the intake pipe 40 and the lower end surface of the tube plate 20; the inner diameter of the anti-wear sleeve 60 is 2-5mm larger than the outer diameter of the filter element 30; The wear sleeve 60 is fastened to the tube sheet 20 by welding.

Specifically, the upper end of the intake pipe 40 is fixed on the tube sheet 20 through a connecting piece 70, and the gas outlet of the intake pipe 40 faces the center of the tube sheet 20. The distance between the lower end surfaces is 2 to 3 times the diameter of the intake pipe 40 .

Specifically, the lower end surface of the filter element 30 is located above the air inlet 11 of the housing 10, specifically, the distance between the lower end surface of the filter element 30 and the air inlet of the housing 10 is 500-1000mm, and a plurality of The filter elements 30 are evenly distributed around the intake pipe 40 .

The following are specific embodiments of the dust removal and filtration method of the present utility model.

The utility model also discloses a dust removal and filtration method, which is applied to the dust removal and filtration device in any of the above-mentioned embodiments, including steps:

S10: making the gas to be filtered pass through the filter element from top to bottom;

S20: the filter element filters the gas to be filtered to obtain clean gas, and forms a filter cake on the surface of the filter element;

S30: discharge clean gas;

S40: Injecting back-blowing gas to the filter element, and the injection direction of the back-blowing gas is from top to bottom, and the back-blowing gas blows off the filter cake on the surface of the filter element.

The dust removal and filtration method of the utility model has simple steps. By making the gas to be filtered pass through the filter element from top to bottom, the load on the filter element is effectively reduced, and then the blowback gas is blown from the top to the bottom of the filter element, thereby avoiding The flow direction of the gas to be filtered is opposite to that of the blowback gas, causing the filter cake to be blown away, further avoiding the secondary dust phenomenon

Exemplary, as shown in Figure 1, the specific application of the fifth embodiment of the dust removal and filtering device of the present invention is as follows:

The gas to be filtered enters the casing 10 from the intake pipe 40 along the first direction A. Since the gas outlet of the intake pipe 40 is located below the tube sheet 20, under the obstruction of the tube sheet 20, the gas to be filtered flows from top to bottom. Through the filter element 30, since the flow direction of the gas to be filtered on the filter element is the same as that of the dust gravity settling direction, the particles with larger density or particle size in the gas to be filtered do not need to pass through the filter element 30 and directly settle at the bottom of the housing 10 In addition, the particles with smaller density or particle size in the gas to be filtered are trapped on the surface of the filter element 30 to form a filter cake, thereby realizing the gas-solid separation of the gas to be filtered, and the obtained clean gas flows from the housing along the second direction B The air outlet 12 of 10 is discharged, which can effectively reduce the load of the filter element 30, thereby avoiding the maintenance cost of the filter element 30.

When the filter element 30 needs to be backwashed, the backflush gas enters the main pipe 51 of the backflush structure 50 along the third direction, because the gas outlet of the sub-pipe 52 faces the through hole on the tube sheet 20 and the filter element 30 is set Below the through hole of the tube sheet 20, the direction of the blowback air blowback filter element 30 is consistent with the flow direction of the filtered gas through the filter element 30, which can not only accelerate the settling of the filter cake, but also effectively prevent the filter gas from being The flow direction of the back-blowing air is inconsistent to disperse the filter cake on the surface of the filter element 30, thereby effectively avoiding the phenomenon of secondary dust raising.

Moreover, the dust removal and filtering device in this embodiment can only open the valve 53 on one sub-pipe 52 during the back blowing process, and then perform back blowing on its corresponding filter element 30, or open two or more than two valves at the same time. The valve 53 on the sub-pipeline 52 of the valve 53 is then back-flushed to its corresponding filter element 30 .

The structure of the dust removal and filtering device of the utility model is simple and reasonable, which can effectively reduce the load of the filter element, further reduce the frequency of back blowing to the filter element, reduce the air consumption in the back blowing process, and effectively avoid the The problem of secondary dust raising reduces the pressure difference of the filter element, thereby effectively ensuring the regeneration effect of the dust removal filter device, improving the dust removal efficiency, and reducing the dust removal cost.

The above is only a preferred embodiment of the utility model, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the utility model, some improvements and modifications can also be made, these improvements and Retouching should also be regarded as the scope of protection of the present utility model.

Claims (9)

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；

The internal diameter bigger than the external diameter of described filter element 2～5mm 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.