CN101036846A - Granular-layer dust precipitator - Google Patents

Abstract

The invention discloses a particle bed filter and dust remover, which comprises an outer shell and at least one layer of filtering device arranged in the outer shell along the height direction, the upper part of the outer shell is provided with a dust-containing gas inlet, and the lower end of the outer shell is provided with a dust outlet. The filter device is equipped with an independent gas reversing device, and the gas reversing device is connected with a main pipe for cleaning gas and a main pipe for blowing back gas. Air vent and air pipe, the inner casing is provided with a granular layer and an air distribution plate, the air vent is arranged above the granular layer, the air pipe is arranged below the granular layer, and the air pipe passes through the outer casing laterally to connect with the gas reversing device; advantages When filtering and removing dust, the inner casing is surrounded by hot air flow, and each part of the inner casing expands and contracts evenly, and has good thermal deformation resistance, so that the dust collector can be used in high temperature and variable temperature occasions, and has a wide range of applications.

Description

A granular bed filter dust collector

technical field

The invention relates to a dust removal device, in particular to a particle bed filter dust remover.

Background technique

With the development of social economy, the industrial development is becoming more and more rapid, but there is also a lot of dust brought in by industrial production. These dusts mainly exist in the gas, so it is necessary to install corresponding dust removal devices. The particle bed filter dust removal device has unique advantages in the field of high temperature gas dust removal because it can use high temperature resistant filter materials, such as quartz sand. However, the traditional particle bed filter and dust removal device needs to use a rake and a transmission mechanism when blowing back to remove dust, and the dust removal effect is not good, and the work efficiency is not high.

The utility model patent specification with the patent No. ZL88201515.X discloses an electric particle layer dedusting device for boilers burning low-quality coal. The device is composed of the traditional rake and the transmission mechanism, and the structure is relatively simple. The plate is heated unevenly, and it is easy to deform to cause material leakage and air leakage, so it cannot be applied to occasions with high temperature or large temperature fluctuations.

Contents of the invention

The technical problem to be solved by the present invention is to provide a particle bed filter and dust collector applicable to occasions with high temperature and large temperature fluctuations.

The technical solution adopted by the present invention to solve the above-mentioned technical problems is: a granular bed filter dust collector, comprising an outer casing and at least one layer of filtering devices arranged in the outer casing along the height direction, and the upper part of the outer casing is arranged There is a dust-containing gas inlet, the lower end of the outer shell is provided with a dust outlet, and the filter device is provided with an independent gas reversing device, and the gas reversing device is connected with a clean gas main pipe and a back-blowing air main pipe , the filter device includes at least one filter unit, the filter unit includes an inner casing, the inner casing is provided with a vent and a vent pipe, and the inner casing is provided with a particle layer and an air distribution plate , the air vent is arranged above the particle layer, the air pipe is arranged below the particle layer, and the air pipe passes through the outer casing laterally to communicate with the gas exchange Connect to the device.

The gas reversing device includes an independent reversing valve connected with the ventilation pipe, and the reversing valve is respectively connected with the cleaning gas main pipe and the back blowing gas main pipe.

The gas reversing device includes a reversing valve and a ventilation branch pipe connected with the reversing valve, the reversing valve is connected with the main clean gas pipe and the blowback gas main pipe, the The ventilation pipe is connected to the ventilation branch pipe.

The inner casing is provided with a pre-distribution perforated plate, and the pre-distribution perforated plate is arranged between the air distribution plate and the air duct.

The filtering device includes more than two filtering units, and the filtering units are distributed in a rectangular shape or in a circular shape in the horizontal direction.

An air suction port is provided on the wall of the outer casing, and the air suction port is arranged between the filter device and the dust outlet.

The air suction port communicates with the dust-containing gas inlet through an air suction and dust removal device.

The cross section of the outer casing is circular, and the dust-laden gas inlet is connected tangentially to the outer casing.

The cross-section of the inner casing is circular, fan-shaped or trapezoidal.

The cross section of the inner casing is square, and the cross section of the outer casing is square.

Compared with the prior art, the present invention has the advantage that when filtering and removing dust, the inner casing is surrounded by hot air flow, each part of the inner casing expands with heat and contracts with cold, and has good thermal deformation resistance, so that the dust collector can be used in high temperature It has a wide range of applications and occasions with variable temperatures; and because at least one filter device is provided, and each filter device is connected to the main clean gas pipe and the back blow gas main pipe through an independent gas reversing device, so that each particle layer can be separated by itself. Dust removal, and from top to bottom, layer by layer fluidization, the dust is transmitted layer by layer downward, and the effect of dust removal is good; and because the dusty gas inlet is tangentially introduced into the outer shell, pre-dust removal is obtained under the action of centrifugal force, reducing the particle layer The filter load, and there is an air suction port on the wall of the outer casing, which can suck the dust cleaned from the particle layer out of the filter.

Description of drawings

Fig. 1 is the sectional structure schematic diagram of the present invention;

Fig. 2 is a schematic cross-sectional view of different directions of the present invention;

Fig. 3 is the sectional view of embodiment one of the present invention;

Fig. 4 is the sectional view of embodiment two of the present invention;

Fig. 5 is a schematic diagram of the connection between the dust-containing air inlet and the outer shell of the present invention.

Detailed ways

The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

Embodiment 1: As shown in the figure, a particle bed filter and dust collector includes an outer shell 1, the upper part of the outer shell 1 is provided with a dust-containing gas inlet 2, and the lower end of the outer shell 1 is provided with a dust outlet 3, and the outer shell 1 There are two independent inner casings 4 arranged side by side on each layer along the height direction, and there are three layers in total. The inner casing 4 is provided with a granular layer 5 and an air distribution plate 6 below the granular layer 5. A pre-distribution perforated plate 7 is arranged under the air distribution plate 6, and an air vent 8 and an air pipe 9 are arranged on the inner shell 4. The air vent 8 is arranged above the particle layer 5, and the air pipe 9 is arranged on the pre-distributed porous plate 7. The lower side and laterally through the outer casing 1 are independently connected with a reversing valve 10, the reversing valve 10 is connected with the clean gas main pipe 11 and the back blowing air main pipe 12 respectively, and the wall surface of the outer casing 1 is provided with an air suction port 13, and the air suction port 13 It is arranged between the inner casing 4 of the last layer and the dust outlet 3 , and the outer casing 1 is also provided with a maintenance hole 14 , and the cross sections of the inner casing 4 and the outer casing 1 are both square.

Embodiment two: as shown in the figure, other structures are the same as embodiment one, and the difference is that the two ventilation pipes 9 juxtaposed on the same layer are all connected with the ventilation branch pipe 15, and the ventilation branch pipe 15 is connected with an independent reversing valve 10, The reversing valve 10 is connected with the clean gas main pipe 11 and the back blow air main pipe 12 respectively.

In addition to the above-mentioned structure, the number of inner shells 4 in each layer of the outer shell 1 can be three, or four, but not less than one; when the number of inner shells 4 in each layer is more than two When more than two, the arrangement of the inner casing 4 can be a rectangular distribution, and can also be an annular distribution (when the cross section of the inner casing 4 is fan-shaped or trapezoidal); the outer casing 1 is provided with the number of layers of the inner casing 4 It can be two layers or four layers, but it cannot be less than one layer; the air suction port 13 can also communicate with the dusty gas inlet 2 through the air suction and dust removal device; in addition, when the cross section of the outer shell 1 is circular , the cross-section of the inner housing 4 can also be circular, fan-shaped or trapezoidal, and the outer housing 1 and the dust-laden gas inlet 2 can also be arranged in a tangential connection.

Claims (10)

1, a kind of granular-layer dust precipitator, comprise shell body and be arranged on the filter of one deck at least in the described shell body along short transverse, the top of described shell body is provided with the ash-laden gas import, the lower end of described shell body is provided with the dust outlet, described filter is provided with independently gas reversing arrangement, be connected with pure qi (oxygen) house steward and blowback air house steward on the described gas reversing arrangement, it is characterized in that described filter comprises at least one filter element, described filter element comprises inner housing, described inner housing is provided with blow vent and breather pipe, be provided with stratum granulosum and air distribution plate in the described inner housing, described blow vent is arranged on the top of described stratum granulosum, described breather pipe is arranged on the below of described stratum granulosum, and described breather pipe laterally passes described shell body and is connected with described gas reversing arrangement.

2, a kind of granular-layer dust precipitator as claimed in claim 1, it is characterized in that described gas reversing arrangement comprises the independently reversal valve that is connected with described breather pipe, described reversal valve is connected with described blowback air house steward with described pure qi (oxygen) house steward respectively.

3, a kind of granular-layer dust precipitator as claimed in claim 1, it is characterized in that described gas reversing arrangement comprises reversal valve and the ventilation arm that is connected with described reversal valve, described reversal valve is connected with described blowback air house steward with described pure qi (oxygen) house steward, and described breather pipe is connected on the described ventilation arm.

4, a kind of granular-layer dust precipitator as claimed in claim 1 is characterized in that being provided with in the described inner housing pre-distribution porous plate, and described pre-distribution porous plate is arranged between described air distribution plate and the described breather pipe.

5, a kind of granular-layer dust precipitator as claimed in claim 1 is characterized in that described filter comprises the filter element more than two, rectangular in the horizontal direction distribution of described filter element or distribution ringwise.

6, a kind of granular-layer dust precipitator as claimed in claim 1 is characterized in that the wall of described shell body is provided with bleeding point, and described bleeding point is arranged between described filter and the outlet of described dust.

7, a kind of granular-layer dust precipitator as claimed in claim 6, it is characterized in that described bleeding point by bleed and dust arrester be communicated with described ash-laden gas import.

8, a kind of granular-layer dust precipitator as claimed in claim 1, the cross section that it is characterized in that described shell body be for circular, tangentially is connected between described ash-laden gas import and the described shell body.

9, a kind of granular-layer dust precipitator as claimed in claim 8, the cross section that it is characterized in that described inner housing is for circular fan-shaped or trapezoidal.

10, a kind of granular-layer dust precipitator as claimed in claim 1, the cross section that it is characterized in that described inner housing is square, the cross section of described shell body is square.

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