CN219333516U - Waste tail gas treatment device - Google Patents

Abstract

The utility model discloses a waste tail gas treatment device which is used for solving the problems of high energy consumption and unsatisfactory blowback effect caused by unreasonable blowback pipe design in a blowback system in the prior art. The waste tail gas treatment device comprises an upper box body and a lower box body, wherein a partition plate is arranged between the upper box body and the lower box body, a plurality of groups of filter bag assemblies are installed on the partition plate in a lifting mode, the lower port of the lower box body is connected with a waste tail gas pipeline and a cloth bag interface, the exhaust end of a compressed air tank is externally connected with a pulse electromagnetic valve, the pulse electromagnetic valve is connected with a main pipe through a clamp and a high-pressure-resistant hose, a plurality of injection branch pipes are welded in the main pipe, the upper ends of the injection branch pipes are fixed on the main pipe, and the injection branch pipes are blind pipes with the lower ends being sealed and are inserted into the middle-lower section of the filter bag assemblies. Firstly, back blowing is carried out through pulse compressed air, the compressed air is sprayed into the space inside the filter bag by matching with the design of the spraying branch pipe, and the back blowing micropores directly back-blow the filter bag, and back blowing air flow directly acts on the filter bag, so that the back blowing effect is improved.

Description

Waste tail gas treatment device

Technical Field

The utility model relates to the technical field related to waste tail gas treatment.

Background

The industrial waste gas and tail gas contain a certain amount of dust, and the dust belongs to pollutants and needs to be filtered and purified before being discharged. The current purifying measures are to use a bag-type dust collector, and the working principle of the bag-type dust collector can be divided into three states of filtration, back blowing and sedimentation, specifically:

(1) And (3) filtering: the dust-containing gas enters from the inner opening of the filter bag, and dust particles are gradually formed on the surface of the filter bag to form a film by the actions of screening, collision, interception, expansion, gravity sedimentation and the like, and purified waste gas is discharged from the outside under the action of the negative pressure fan.

(2) Back blowing: when the thickness of the ash film on the surface layer of the filter bag reaches a certain value, namely, when the detection system senses that a certain pressure difference is achieved before and after, the filter bag is inflated and the accumulated ash film on the surface layer is slumped by supplying clean compressed air which is higher than the pressure of the waste gas to one box body direction in the dust remover.

(3) Sedimentation: stopping back blowing, closing the upper and lower switching valves, and enabling dust in the filter bag to freely settle under the condition of no airflow flow so as to reduce the deposition of the filter bag of the floating dust secondary item.

In blowback system designs, there is a problem in that the compressed air provided for blowback cannot precisely exert a reverse expansion force on the filter bag, i.e., the effect of blowback is limited. In the existing design, in order to increase the back blowing effect, the back blowing time is often increased or the back blowing pressure is increased. Taking the example of increasing the back-blowing pressure, increasing the air pressure of the compressed air can naturally improve the back-blowing effect, but the possibility of bursting the filter bag is also unavoidable.

Disclosure of Invention

In order to solve the defects of the prior art, the utility model provides a waste tail gas treatment device which is used for solving the problems of high energy consumption and unsatisfactory blowback effect caused by unreasonable design of blowback pipes in a blowback system in the prior art.

The technical scheme adopted for solving the technical problems is as follows:

the utility model provides a waste tail gas treatment device, includes box and lower box to set up the baffle between upper and lower box, hoist and mount installation multiunit filter bag subassembly on the baffle, the lower port of lower box is connected waste tail gas pipeline and sack interface, negative pressure fan passes through bellows and last box inner chamber intercommunication, and, the opposite side installation compressed air jar with negative pressure fan interface, the inlet port installation gas filter of this compressed air jar, at its characterized in that, the external pulse solenoid valve of exhaust end of compressed air jar, pulse solenoid valve passes through the clamp, high pressure resistant hose is connected with the house steward, the house steward is arranged in last box inner chamber with snakelike circuitous mode, and the route of arranging of house steward covers all filter bag subassemblies, and, welds a plurality of jetting branch pipes in the house steward, the jetting branch pipe upper end is fixed on the house steward, the jetting branch pipe is lower extreme confined blind pipe and inserts to the well hypomere of filter bag subassembly, and is equipped with the jetting micropore on the jetting branch pipe.

Further, the filter bag component consists of a filter bag, a supporting frame, a pressing plate and a venturi tube, wherein the upper end of the filter bag component is fixed on the partition plate through the pressing plate and a fastening screw, the lower end of the filter bag component is suspended in the inner cavity of the lower box body, and the filter bag enables the cavity of the upper box body and the cavity of the lower box body to be kept through for selective filtration.

Further, the blowing micropore is millimeter-sized.

Further, a negative pressure fan interface, an overhaul skylight and a support for installing the compressed air tank are arranged on the upper box body.

Further, the negative pressure fan is arranged on the side wall of the lower box body through a triangular bracket.

Further, the outer surface of the lower box body is welded with a hook.

The beneficial effects of the utility model are as follows:

the device is improved by the back blowing system, the back blowing is firstly carried out by the pulse type compressed air, the design of the injection branch pipe is matched, the compressed air is injected into the space inside the filter bag, the back blowing is directly carried out on the filter bag by the back blowing micropores, and the back blowing air flow directly acts on the filter bag, so that the back blowing effect is improved.

In the device, through the venturi tube design at the top of the filter bag component, during normal operation, airflow can be accelerated at the position, namely, the airflow is accelerated.

Drawings

Fig. 1 is a side view of the present device.

Fig. 2 shows a lower flange opening of the lower case.

Fig. 3 is a front view of the present device.

FIG. 4 is a plan view of the manifold and filter bag assembly.

Fig. 5 is a partial enlarged view of fig. 3 at a.

Fig. 6 is a partial enlarged view of fig. 3 at B.

Fig. 7 is a partial enlarged view of K in fig. 3.

In the figure:

10 upper box body, 11 overhaul skylight,

20 lower box body, 21 rectangular flange, 22 hook and 23 triangular bracket,

a 30-separator plate,

40 negative pressure fans, 41 bellows,

50 filter bag components, 51 filter bags, 52 supporting frames, 53 pressing plates, 54 Venturi tubes,

60 compressed air tanks, 61 gas filters, 62 pulse solenoid valves, 63 clamps, 64 high pressure resistant hoses, 65 manifold, 66 injection manifold.

Detailed Description

The waste tail gas treatment device comprises an upper box body 10 and a lower box body 20, and a partition board 30 is arranged between the upper box body and the lower box body, and the partition board is also a mounting plate of the filter bag assembly. The following describes the implementation of the present technology in detail with reference to fig. 1 to 7 of the specification.

Specifically, in this embodiment, two boxes are rectangular appearance, and wherein the lower box is the granule of waste exhaust and catches the chamber, and the last box is the collection chamber of waste exhaust after the purification to be provided with negative pressure fan interface, maintenance skylight and the relevant support or the support of installation compressed air jar on this last box.

In this embodiment, the description process of this embodiment is marked and described up and down, left and right in the view shown in fig. 3. The state of fig. 3 is also the mounted state of the device under normal observation.

The description is made in a bottom-up manner, with the flow direction of the air flow being preferred.

In the present technology, the lower case 20 is a welded cuboid structure, and the lower port of the case is a rectangular flange 21 for connecting a waste exhaust pipeline interface and a cloth bag interface, for example, through three-way pipeline switching, wherein the waste exhaust pipeline supplies waste gas, and the cloth bag is used for collecting granular pollutants. The outer surface of the case is welded with a plurality of mounting hooks 22 for mounting. A triangular bracket 23 is arranged on the side wall of the box body, the triangular bracket is used for installing a negative pressure fan 40, the negative pressure fan is fixed on the triangular bracket through a fastening bolt, the negative pressure fan 40 is communicated with the inner cavity of the upper box body 10 through a corrugated pipe 41, and negative pressure suction force is provided for the upper box body through the negative pressure fan.

The partition plate 30 is installed at the top of the upper case, and the filter bag assembly 50 is installed on the partition plate, and the filter bag assembly is fixedly installed in such a design that the installation mode of the lifting is adopted, specifically, the upper end of the filter bag assembly 50 is lifted on the partition plate, the filter bag assembly is composed of a filter bag 51, a supporting frame 52, a pressing plate 53 and a venturi tube 54, wherein the upper end of the filter bag assembly is fixed on the partition plate through the pressing plate 53 and a fastening screw, the lower end of the filter bag assembly is suspended in the inner cavity of the lower case, and the cavity of the upper case and the lower case is kept through selective filtration through the filter bag. The penetration has air flow passing property and has isolation function on small-particle dust, namely, the small-particle dust is isolated on the outer surface of the filter bag. The venturi tube is positioned at the upper opening position of the filter bag assembly and is fixedly connected with the pressing plate in a welding and fixing mode. The venturi effect of the venturi tube is utilized to effectively guide the airflow.

The upper box 10 is located above the partition board, and the upper box and the lower box are effectively isolated by the partition board 30, so that an upper cavity and a lower cavity are formed. The top of the upper cavity is an overhaul skylight 11, a negative pressure fan interface is arranged on the side surface of the upper cavity, a relative support or a support of a compressed air tank is arranged on the other side opposite to the negative pressure fan interface and is used for installing a compressed air tank 60, an air filter 61 is arranged at an air inlet port of the compressed air tank and is connected with an air compressor, compressed air is input into the compressed air tank through the air compressor, and the air pressure in the compressed air tank is kept in a constant state. The exhaust end of the compressed air tank 60 is externally connected with a pulse electromagnetic valve 62, the pulse electromagnetic valve is connected with a main pipe 65 through a clamp 63 and a high pressure resistant hose 64, the main pipe 65 is arranged in an upper box body inner cavity in a serpentine detour mode, referring to fig. 4, the arrangement path of the main pipe covers all filter bag components, a plurality of injection branch pipes 66 are welded in the main pipe 65, the upper ends of the injection branch pipes are fixed on the main pipe, the inner cavity of the pipe is communicated, and the upper ends of the injection branch pipes are welded and connected. The blowing branch 66 is a blind pipe with a closed lower end and extends to the vicinity of the middle lower section of the filter bag, and a plurality of blowing micropores are formed on the blind pipe, wherein the blowing micropores are in millimeter level, so as to form a plurality of micropores. And directly back-blowing the filter bag through back-blowing. In this technique, the injection micropore directly acts on the filter bag, and the injection micropore sets up a plurality ofly from top to bottom for the air current distribution of blowing on the filter bag is even, and for example, the air current that this injection micropore blown out is direct, the vertically blows to the filter bag internal surface, has stronger precision, and the advantage of this kind of precision makes the effective work of air current directly act on the filter bag, and the compressed air current that shortens comes out in the pipeline back with the distance on the filter bag inner wall, has avoided the loss of air current consumption, has improved the blowback effect. The improvement of the effect is not carried out on the premise of improving the pressure intensity of the compressed air, and the damage to the filter bag assembly can be effectively avoided.

The above examples are provided for illustrating the preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model, and those skilled in the art should not depart from the spirit of the present utility model in all kinds of modifications and improvements that fall within the scope of the present utility model as defined in the appended claims.

Claims (6)

1. The utility model provides a waste tail gas treatment device, includes box and lower box to set up the baffle between upper and lower box, hoist and mount installation multiunit filter bag subassembly on the baffle, the lower port of lower box is connected waste tail gas pipeline and sack interface, negative pressure fan passes through bellows and last box inner chamber intercommunication, and, the opposite side installation compressed air jar with negative pressure fan interface, the air filter is installed to the inlet port of this compressed air jar, at its characterized in that, the external pulse solenoid valve of exhaust end of compressed air jar, pulse solenoid valve passes through clamp, high pressure resistant hose and is connected with the house steward, the house steward is arranged in last box inner chamber, and the route of arranging of house steward covers all filter bag subassemblies, and welds a plurality of jetting branch pipes in the house steward, the jetting branch pipe upper end is fixed on the house steward, the jetting branch pipe is lower extreme confined blind pipe and inserts to the well lower segment of filter bag subassembly, and is equipped with the jetting micropore on the jetting branch pipe.

2. The exhaust gas treatment device according to claim 1, wherein the filter bag assembly is composed of a filter bag, a support frame, a pressing plate and a venturi tube, wherein the upper end of the filter bag assembly is fixed on the partition plate through the pressing plate and a fastening screw, the lower end of the filter bag assembly is suspended in the inner cavity of the lower box body, and the filter bag enables the cavity of the upper box body and the cavity of the lower box body to be kept through for selective filtration.

3. The exhaust gas treatment device of claim 1, wherein the injection micro-holes are in millimeter scale.

4. The exhaust gas treatment device according to claim 1, wherein the upper case is provided with a negative pressure fan interface, an inspection skylight, and a support for installing a compressed air tank.

5. The exhaust gas treatment device according to claim 1, wherein the negative pressure fan is mounted on a side wall of the lower case through a triangular bracket.

6. The exhaust gas treatment device according to claim 1, wherein the outer surface of the lower case is welded with hooks.

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