A kind of alkali washing filter device for rubber production

Abstract

The invention provides an alkali washing filter device for rubber production, which belongs to the technical field of rubber production and includes an alkali washing tower body. The bottom of the alkali washing tower body is provided with a filter part with an automatic cleaning function. The lye is filtered. The filter part includes an intermediate filter chamber. There are several filter plates with filter holes arranged in the intermediate filter chamber. Several filter plates are distributed in the middle filter chamber from top to bottom according to the diameter of the filter holes from large to small. , and the filter plate has two working states, one is the normal filtering state in which it protrudes downwards in an arc shape, and the other is the cleaning and filtering state in which it protrudes upwards in an arc shape. The alkali cleaning filter device for rubber production can clean the impurities filtered out by changing the working state of the filter plate, without replacing the filter plate due to excessive accumulation of impurities affecting the filtering effect, so that the alkali cleaning can be carried out continuously and stably, and has the advantages of The filter pressure is small and the overall filter effect is good.

Description

technical field [0001] The invention relates to the technical field of rubber production, in particular to an alkali washing filter device for rubber production. Background technique [0002] During the rubber production process, a large amount of waste gas will be generated, which contains a large amount of pollutants such as styrene, sulfide, nitrogen oxides, etc., and the smoke will cause serious pollution to the environment. Therefore, it is necessary to treat and remove the waste gas during the rubber production process. The polluting components in it, alkali washing is one of the treatment links. The chemical reaction between the alkali washing liquid and some pollutants in the exhaust gas is used to achieve the purpose of removing pollutants. In the process of rubber production, alkali washing towers are usually used to clean The waste gas is washed with alkali. [0003] The alkali washing tower mainly includes upper and lower sections. The upper section uses concent...

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Problems solved by technology

[0003] The alkali washing tower mainly includes upper and lower sections. The upper section uses concentrated alkali solution to carry out secondary alkaline washing on the exhaust gas, and the lower section uses dilute alkali solution with a concentration lower than the concentrated alkali solution in the upper section to perform preliminary alkaline washing on the exhaust gas and circulates the dilute alkali solution through a circulation pump. In use, in the process of alkali cleaning, the waste gas passes through the lower section and the upper section from bottom to top in turn, and the dilute lye and concentrated lye are sprayed out from the corresponding nozzles to react with the passing waste gas. Among them, the new concentrated lye is supplied by the supply pump Continue to send into the upper section, the concentrated lye in the upper section is reduced by the reaction concentration and flows into the lower section as a supply to the lower section, the dilute lye in the lower section is reduced by the reaction concentration, at this time, the supply left by the upper section is mixed with the diluted lye in the lower section. Supplement the concentration of the dilute lye in the lower section to keep the dilute lye in the lower section to maintain a stable cleaning effect. Particles carried in the exhaust gas) block the nozzle and affect the circulation of dilute lye, thereby reducing the effect of cleaning the exhaust gas in the next section

[0004] In view of the aforementioned problems, the existing treatment measures are mainly to add a filter device to filter impurities during the circulation of dilute lye, but its disadvantage is that it is more troublesome to replace, and it is necessary to suspend the alkaline cleaning work, which reduces the efficiency of alkaline cleaning

[0005] The Chinese invention patent with the application number CN201811185670.X discloses a device that solves the easy blockage of the alkali washing tower spray. The device adds a bypass liquid pipe and a movable alkali filter at the alkali liquid inlet of the alkali washing tower , when working normally, the lye enters the tower through the movable lye filter, which can effectively prevent the impurities in the lye from entering the tower directly and prevent the sprayer from being blocked. When the movable lye filter element needs to be replaced, The lye enters the tower through the bypass liquid pipe, and the filter element is replaced without affecting the alkali cleaning work. However, during the filter element replacement process, the lye will still directly enter the tower, and it is easy to cause the sprayer to be blocked after accumulation The problem

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