Fine filter device of high pressure back-flush rotary filter drum

Abstract

The invention discloses a fine filter device of a high pressure back-flush rotary filter drum. The fine filter device comprises a shell, a filter drum, a sewage inlet pipe, a sewage discharge pipe, a back-flush water inlet pipe, a water outlet pipe and a high pressure fixed spray pipe, wherein the high pressure fixed spray pipe is arranged in the filter drum; one end of the water outlet pipe is connected with a water inlet with a filter screen; the end with the filter screen of the water inlet with the filter screen is positioned in the filter drum; one end of the filter drum is connected with the high pressure fixed spray pipe through a first bearing, and the other end of the filter drum is connected with the water inlet with the filter screen; one end of the water inlet with the filter screen is arranged on the shell through a second bearing, and the other end of the water inlet with the filter screen is connected with the high pressure fixed spray pipe through a third bearing; the top of the shell is provided with a motor; an output shaft of the motor is provided with a driving chain wheel; a driven chain wheel is arranged at a connecting end of the filter drum with the water outlet pipe; and the driving chain wheel is connected with the driven chain wheel through a chain. Double filtration is formed through the filter screen on the filter drum and the water inlet with the filter screen, so that the filtration accuracy of water is improved.

Description

technical field [0001] The invention relates to a filtering device for circulating and reusing cooling water for a normalizing furnace, in particular to a fine filtering device for a high-pressure recoil rotary filter cartridge. Background technique [0002] The cooling section of the normalizing furnace meets the strip cooling requirements through spraying of gas mist, air and water. Among them, the nozzle orifice of the air mist and water spray device must be very small, about 1mm, in order to achieve better spray and cooling effect, so as to meet the process requirements. [0003] The disadvantages of the existing cooling water filtration and circulation system for industrial furnaces: Although the cooling water is filtered, the cooling water still contains a certain amount of fine impurities, including iron oxide, sludge, inorganic salts and other sundries, etc. These impurities will Gradually make the nozzle orifice of the air mist and water spray device smaller, chang...

AI Technical Summary

Problems solved by technology

[0003] The disadvantages of the existing cooling water filtration and circulation system for industrial furnaces: Although the cooling water is filtered, the cooling water still contains a certain amount of fine impurities, including iron oxide, sludge, inorganic salts and other sundries, etc. These impurities will Gradually make the nozzle orifice of the air mist and water spray device smaller, change the spray speed of the nozzle, reduce the spray momentum and cooling effect, until it is completely blocked

Especially for nozzles that work discontinuously, they are more likely to be clogged, and if they are exposed to high temperatures in the absence of water, they will deform and seriously affect the cooling effect of the workpiece.

At the same time, the effective adjustment range of this nozzle is very small, and the nozzle must be replaced to increase the adjustment range, thus affecting the stable operation of the entire system

Moreover, the existing cooling water filtering circulation system for normalizing furnaces also has the following disadvantages: when the cooling water passes through the filter, there are many impurities on the filter screen of the filter, which requires regular replacement of the filter screen and cleaning of the filter screen, which greatly reduced work efficiency

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