1. The utility model provides a wet-type centrifugal exhaust fan, includes the inside spiral case that is provided with fan wheel (3), the terminal surface center of spiral case is provided with air intake (6), and the tangential direction of spiral case is provided with air outlet (7), fan wheel passes through actuating mechanism drive, its characterized in that: the top of the volute is provided with a sprayer (5), the bottom of the volute is provided with a drain pipe (8) with a subsea valve, and one end of the drain pipe, far away from the nest shell, is provided with a sewage tank (10).

2. The wet centrifugal blower of claim 1, wherein: the drain pipe is communicated with the sewage tank through a flexible connection (9).

3. The wet centrifugal blower of claim 2, wherein: and a sewage discharge pipe (11) with a sewage discharge valve is arranged at the bottom of the sewage tank.

4. The wet centrifugal blower of claim 3, wherein: the volute comprises a volute body (12) and a volute top cover (4) detachably connected with the volute body.

5. The wet centrifugal blower of claim 4, wherein: the volute top cover (4) and the volute body (12) are detachably assembled through a flange bolt assembly.

6. The wet centrifugal blower of claim 5, wherein: the sprayer (5) is arranged on the volute top cover (4).

7. The wet centrifugal blower according to any one of claims 1 to 6, wherein: the driving mechanism comprises a driving motor (14), a coupler (13) and an impeller shaft (2) which are sequentially connected in a transmission manner, the impeller shaft is supported through a bearing seat (1) with a bearing, and the fan impeller is arranged at the end part of the impeller shaft.

Background

Along with the increasing of industrial environmental protection standards, the treatment requirements for dust-containing flue gas generated in industrial production are also higher, the existing treatment equipment for the dust-containing flue gas is roughly divided into a dry type treatment equipment and a wet type treatment equipment, the wet type dust removal comprises water filtration dust removal, spray dust removal and the like, and the principle of the wet type dust removal is that the dust removal is achieved by utilizing the adsorption effect of a water body on dust.

For wet dedusting equipment, a centrifugal blower is typically used to power the dusty gas. At present, dust gas with high humidity and a large amount of water mixed in is sprayed to enter a fan impeller chamber (a fan volute) from an air inlet of a fan and then is discharged from an air outlet. In the process of one inlet and one outlet, wet dust is easy to adhere to the fan impeller and is deposited at the bottom of the fan volute, so that the fan impeller rotates unevenly, and the reliability and the stability of the air draft process are negatively affected.

Disclosure of Invention

In view of the above, the present invention provides a wet centrifugal blower to solve the problem of unbalanced rotation of a blower impeller, thereby improving the reliability and stability of the air draft process.

The invention solves the problems through the following technical means:

the utility model provides a wet-type centrifugal exhaust fan, includes the inside spiral case that is provided with fan wheel, the terminal surface center of spiral case is provided with the air intake, and the tangential direction of spiral case is provided with the air outlet, fan wheel passes through the actuating mechanism drive, the top of spiral case is provided with the spray thrower, and the bottom of spiral case is provided with the drain pipe of taking the subsea valve, the drain pipe is kept away from the one end of nest shell and is provided with the sewage case.

Further, the drain pipe is communicated with the sewage tank through flexible connection.

Further, a drain pipe with a drain valve is arranged at the bottom of the sewage tank.

Further, the volute comprises a volute body and a volute top cover detachably connected with the volute body.

Furthermore, the volute top cover and the volute body are detachably assembled through a flange bolt assembly.

Further, the sprayer is arranged on the top cover of the volute.

Furthermore, actuating mechanism is including driving motor, shaft coupling and the impeller shaft of transmission connection in proper order, the impeller shaft supports through the bearing frame of taking the bearing, fan wheel installs at impeller shaft tip.

The invention has the beneficial effects that:

the utility model provides a wet-type centrifugal air exhauster, including the inside spiral case that is provided with fan wheel, the terminal surface center of spiral case is provided with the air intake, and the tangential direction of spiral case is provided with the air outlet, fan wheel passes through the actuating mechanism drive, the top of spiral case is provided with the spray thrower, and the bottom of spiral case is provided with the drain pipe of taking the subsea valve, the one end that nest shell was kept away from to the drain pipe is provided with the sewage case. The wet centrifugal exhaust fan can wash dust adhered to the fan impeller and the inner wall of the volute through the sprayer, and sewage after washing is discharged from the drain pipe, so that the problem of unbalanced rotation of the fan impeller caused by dust accumulation is solved, and the reliability and stability of the exhaust process are effectively improved.

Drawings

The invention is further described below with reference to the figures and examples.

FIG. 1 is a cross-sectional view of a preferred embodiment of the present invention;

fig. 2 is a side view of the preferred embodiment of the present invention.

Detailed Description

The invention will be described in detail below with reference to the accompanying drawings, as shown in fig. 1-2: the utility model provides a wet-type centrifugal exhaust fan, is provided with fan wheel 3's spiral case including inside, the terminal surface center of spiral case is provided with air intake 6, and the tangential direction of spiral case is provided with air outlet 7, fan wheel 3 passes through the actuating mechanism drive, actuating mechanism includes driving motor 14, shaft coupling 13 and the impeller shaft 2 that the transmission connects gradually, the impeller shaft supports through bearing frame 1 of tape bearing, fan wheel 3 installs at the impeller shaft tip. When the dust-laden air conditioner works, under the driving of the fan impeller, wet dust-laden air enters from the air inlet and is discharged from the air outlet.

The volute comprises a volute body 12 and a volute top cover 4, the volute top cover 4 and the volute body 12 are assembled in a detachable mode through a flange bolt assembly, specifically, flanges are welded on the butt joint faces of the volute top cover 4 and the volute body 12, and the flanges are connected through the bolt assembly. By adopting the structural design, the top cover of the volute is disassembled, so that the integral hoisting of the fan impeller can be realized, and compared with the traditional method, the fan impeller is disassembled after the air inlet is integrally disassembled, so that the convenience for overhauling the fan impeller is greatly improved, and the workload of the overhauling process is also reduced. To meet the amount of space that the fan wheel is suspended from and the ease of lifting, the span of the volute top cover is typically 135 °.

The top of the volute top cover 4 is provided with a sprayer 5, and the sprayer 5 supplies water through an external water supply system; the bottom of spiral case body 12 is provided with drain pipe 8 of taking the sea valve, the one end that drain pipe 8 kept away from nest shell body 12 is provided with sewage case 10, drain pipe 8 passes through flexible coupling 9 and sewage case intercommunication, the bottom of sewage case 10 is provided with the blow off pipe 11 of taking the blowoff valve. During specific work, the dust adhered to the inner wall of the fan impeller and the inner wall of the volute are washed through the sprayer, and the washed sewage is discharged into the sewage tank from the drain pipe and then is discharged to the sewage treatment station through the drain pipe. Thereby solved because of the problem that the fan wheel rotation is unbalanced that the dust gathers and lead to, effectively improved the reliability and the stability of convulsions process.

Finally, the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all of them should be covered in the claims of the present invention.