Centrifugal fan provided with centrifugal force separation device

Abstract

The invention relates to a centrifugal fan for separating oil smoke, purifying air and dirt. The centrifugal fan is to mainly solve the problem that an existing centrifugal fan is not provided with aseparation device under the action of centrifugal force, or the technical difficulty of poor separation efficiency of the separation device. According to the technical scheme, the centrifugal fan comprises a fan shell, an impeller and a separation device, wherein the separation device is composed of an annular separation plate, an induced draft guide pipe, a separation box body and a blowdown water seal pipe; the annular separation plate is an annular body with opening formed in two opposite ends; the openings of the annular body are formed in a manner that a fan outlet is inverted at the inner upper end of the separation box body; one end of the annular separation plate is combined with the upper end of one side of the separation box body; the other end of the annular separation plate isarranged at the upper end of the separation box body and is provided with a spiral tongue; an induced draft pipe is combined with the outer side of the annular separation plate and the upper end of the other side of the separation box body is provided with an induced draft pipe outlet; the bottom of the separation box is provided with a pollution discharge water seal pipe; the width of the annularseparation plate is consistent with the thickness of the fan shell; and a fan inlet and a wind wheel are arranged in the middle of the annular separating plate

Description

technical field [0001] The invention relates to a centrifugal fan for separating oil fume, purifying air and separating dust and dirt. Background technique [0002] In the prior art, devices such as filter screens, cloth bags, and electrostatic precipitators with separation functions are installed on the outer end of the centrifugal fan to remove dust and separate particles in the oil fume gas. The above methods can be summarized as mesh filtration technology. This technical method When the gas containing particulate matter passes through the grid, the particulate matter can also pass through at the same time, resulting in leakage; when this technical method is used, the grid will be blocked so that it cannot be used; at the same time, this technical method cannot achieve fine separation. The finer the grid, the easier it is to block. Aiming at the above-mentioned technical difficulties, the patented technology ZL201621072230.X No. Centrifugal fan equipped with separation o...

AI Technical Summary

Problems solved by technology

But the problem that is easy to occur is: due to the large distance between the volute tongue at the outlet end of the centrifugal fan and the upper end of the separation box, part of the air sucked by the wind wheel flows back to the fan casing, while most of it is discharged, and the fan Part of the air in the shell is discharged out of control, and it is in a state where it cannot completely separate and process oil fume gas and air purification, resulting in a decrease in separation efficiency. When the separation efficiency is constant, the content of particulate matter is less and it is easier to meet the standard, and the content of particulate matter is more than the standard.

In addition, there is still a problem that the fan casing has the function of separating particles, and the problems of sewage discharge and dust cleaning are also highlighted. When the thickness is high, the sewage sealing pipe will be blocked, and it cannot be used if it is not cleaned in time. Considering the airtightness requirements of the fan casing for the air body and the water body and the addition of some devices, the fan casing is completely integrated. Improper decomposition or combination and decomposition will cause air leakage and water splashing, which will bring great difficulties to production and use.

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