1 results about "Cause blockage" patented technology

The invention discloses a filtering device for chemical waste treatment, and belongs to the technical field of chemical machinery. The filtering device for the chemical water treatment comprises a bracket, a filtering tank, a filtering screen and an anti-blockage mechanism, wherein the anti-blockage mechanism comprises an aerostatic press and an air delivery pipe; the air delivery pipe comprises an air inlet part and a working pipe; the aerostatic press is communicated with the air inlet part; the working pipe is helically distributed and horizontally arranged; the working pipe is located below the filtering screen and approaches the filtering screen; the working pipe comprises an inner end and an outer end; the inner end is communicated with the air delivery pipe; the working pipe is provided with multiple air outlets which are open upwards obliquely. Air is delivered into the working pipe by using the aerostatic press and is exhausted via the air outlets; as the multiple air outletsare obliquely arranged and the working pipe is helical, chemical water above the working pipe is enabled to do helical ascending motion; the fact that a substance which is larger in particle remainingon the filtering screen cause blockage is prevented; the filtering efficiency can be greatly improved and the filtering effect is improved.