Multiple industrial sewage filtration method

Abstract

The invention provides a multiple industrial sewage filtration method, which comprises the following steps: (1) removing heavy oil impurities from industrial wastewater in a sedimentation tank with asteel strip oil scraper; (2) installing a corrugated filter screen on a water inlet at the bottom of a long shaft pump for transporting industrial sewage, so as to prevent strip sundries overflowing from an overflow pool from entering into a transport cycle and then entering a production system through water equipment inside body; (3) installing a movable magnetic mesh grille on the periphery inner side of the overflow pool so as to control all kinds of sundries around the overflow pool to directly flow out and then enter into a reservoir; and (4) adding a plastic decontamination floating neton the surface of industrial sewage at the periphery in the sedimentation tank so as to ensure that sundries and dirty oil on the surface of industrial sewage are adsorbed by the decontamination floating net to the maximum extent and then do not enter the next cleaning process. The multiple industrial sewage filtration method can protect operating equipment in the production system, and ensure that the standard of industrial wastewater recycling again is reached and the environmental emission requirements are met.

Description

Technical field: [0001] The invention relates to a method for multiple cleaning and filtering of industrial sewage, which belongs to the technical field of industrial sewage treatment. Background technique: [0002] Iron and steel companies have many industrial water sedimentation tanks, where all kinds of sewage-containing production water in the production system are collected for short-term sedimentation. During this period, various chemicals are added to adjust or remove other chemical elements in the industrial water that are not conducive to production, and Through the short settling time, the heavy miscellaneous (dirt) is settled at the bottom of the sedimentation tank, the sundries with similar density to water are "contained" in (in) the sewage, and the lighter miscellaneous (dirt) float on the surface of industrial sewage. The heavier miscellaneous (dirt) that settles on the bottom of the sedimentation tank is regularly cleaned by the mud scraper or manually. Carr...

AI Technical Summary

Problems solved by technology

At present, the only equipment for removing light miscellaneous (dirt) floating on the surface of industrial sewage is an ordinary flat steel belt oil scraper. When the belt is covered with heavy oil, the steel belt will slip on the driving shaft, resulting in unfavorable aspects such as failure to perform normal rotation operations

Secondly, when the industrial sewage passes through the overflow tank, there is no grill to filter the large plastic or wooden debris. The large plastic or wooden debris enters the reservoir with the flowing industrial sewage, and then enters the long-axis pump of the conveying equipment. , into the recycling system again, resulting in damage to the conveying equipment, affecting the use of recycled water, or being discharged, polluting the environment, which is not conducive to environmental protection

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