Negative pressure filtering system based on PLC automatic control system and filtering method thereof

Abstract

The invention discloses a negative pressure filtering system based on a PLC automatic control system and a filtering method thereof. The negative pressure filtering system comprises a filter pressingbox, and a primary filtering box and a settling box, which are fixedly connected with the top of the filter pressing box. The front surface of the primary filtering box is fixedly connected with a control panel. The invention relates to the technical field of filtering devices. The effect of continuously pumping and discharging sewage primarily filtered by the primary filtering box can be realized; an electric push rod is used for providing driving force; relative to the use of a pump, pressure is applied more stably, the pumping and discharging speed is also convenient to adjust; an efficientfilter effect is maintained, a filter cone is arranged and matched with a filter membrane on the side face to carry out fine filtration of sewage obtained after primary filtration, the filtering quality can be effectively guaranteed, meanwhile, filter residues can be concentrated in the middle, a purified water discharging pipe can be directly opened to discharge waste residues, when the waste residues need to be discharged, the filter cone does not need to be detached and taken out for cleaning, cleaning is easier and more convenient, and the maintenance time is greatly saved.

Description

technical field [0001] The invention relates to the technical field of filtering devices, in particular to a negative pressure filtering system based on a PLC automatic control system and a filtering method thereof. Background technique [0002] Filtering is a general term for a large class of unit operations. In the process of purifying fluids through special devices, there are many ways to filter, and a wide range of material systems are used. Solid-liquid, solid-gas, large particles, and small particles are all common. Filtration is when the liquid (or gas) in the suspension (or the heating gas containing solid particles) penetrates the medium under the action of driving force or other external force, and the solid particles and other substances are trapped by the filter medium, so that the solid and other substances and the liquid ( or gas) separation operation. [0003] Existing filtration devices generally use filter components such as filter membranes and filter scr...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the deficiencies of the prior art, the present invention provides a negative pressure filtration system based on a PLC automatic control system and its filtration method, which solves the problem that after a period of filtration in the existing filtration device, the surface of the filtration member will accumulate unequal The filter residue generally needs to be opened to clean up the equipment, which is troublesome and greatly affects the work efficiency. However, some scraper filter systems have the problem that the filter material is difficult to choose and the use is limited.

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