A treatment method for grid pollution

Abstract

The invention relates to the field of sewage treatment, in particular to a grid pollution-stopping treatment method. The invention includes three steps of grid interception, flushing and decontamination, and deep self-cleaning of the grid, by adding oxalic acid flushing components in the grid decontamination machine to remove the scale calcification layer, adding internal flushing components to remove the hair fiber layer; optimizing each flushing component The installation sequence of each flushing component is optimized, the flushing angle of each flushing component is optimized, the flushing components cooperate with each other, the front-end flushing provides a bonus to the effect of the rear-end flushing, and the deep cleaning of the grille mesh is realized; by controlling the gate plate of the trash gate in the gate The rotation in the frame realizes the transcendence function of the grille channel; an automatic control PLC control system is set up to control the implementation of the dirt blocking process, and the combination and adjustment of the flushing steps are reasonably carried out according to the blockage of the grille plate to achieve energy saving and emission reduction The automatic cleaning of the system under the premise of improving the efficiency of dirt blocking and cleaning; the connection of the PLC control system with the touch screen and the central control is convenient for operation.

Description

technical field [0001] The invention relates to the field of sewage treatment, in particular to a method for treating sewage with a grid. Background technique [0002] The mesh plate type internal inflow grille is a relatively new type of high-efficiency grille decontamination equipment that combines dirt blocking and decontamination. It has compact structure, small size, high slag interception efficiency and reliable operation. More and more sewage treatment plants are applying internal inflow grilles to the pretreatment stage. In actual use, there are problems of difficulty in cleaning and short life due to blockage caused by long-term use of the grid screen, which is embodied in the following aspects: the slag on the screen is not washed cleanly, which is easy to block the water hole and reduce the flow rate; fiber The slag is wrapped around the screen, which cannot be removed by normal washing, causing blockage; the components in the sewage make the screen easy to scale...

AI Technical Summary

Problems solved by technology

In actual use, there are problems of difficult cleaning and short service life due to blockage caused by long-term use of the grille screen, which is manifested in the following aspects: the slag on the screen is not washed cleanly, and it is easy to block the water hole and reduce the flow rate; The slag is entangled on the screen, which cannot be removed by normal flushing, causing blockage; the components in the sewage make the screen easy to scale, resulting in blockage of the screen

[0003] In the prior art, the washing of the grille mesh mainly adopts the method of setting an external flushing device outside the frame of the grille decontamination machine. However, in actual use, the external flushing can only wash away the slag in the holes of the grille mesh. and due to the unreasonable installation position and flushing angle setting, the long-term flushing of the screen is not clean, not only for the surface slag, but also unable to remove the hair fiber layer inside the grid screen and the long-term scale calcification inside and outside the screen Floor

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