Efficient recyclable solid-liquid separation method and device for industrial wastewater

Abstract

The invention relates to an efficient recyclable solid-liquid separation method for industrial wastewater, which comprises the following specific steps: S1, collecting wastewater; S2, enabling the wastewater to pass through a vibrating screen; S3, layering the wastewater, namely, dividing the wastewater subjected to impurity removal into upper-layer liquid and lower-layer concentrated sludge through a corresponding separation mechanism, controlling the suspended matter concentration of the upper-layer liquid to be 1000ppm or below, and controlling the water content of the lower-layer concentrated sludge to be 96% or below; and S4, performing solid-liquid separation, comprising: S41, sending the upper-layer liquid to filter pressing equipment for solid-liquid separation, recycling the separated filtrate, and intercepting suspended matters; and S42, feeding bottom sludge, and conveying the lower-layer concentrated sludge with the water content not exceeding 96% to the filter pressing equipment for continuous solid-liquid separation operation. According to the invention, slurry and cleaning water can be effectively and comprehensively recycled, the recycling efficiency and the recycling effect can be effectively and greatly improved, and the cost consumed by recycling can be effectively reduced, so that enough economic benefits are generated, and the resource utilization rate is improved.

Description

technical field [0001] The invention relates to an efficient and recyclable solid-liquid separation method and device for industrial waste water, which is mainly used in the treatment of industrial waste water with high concentration of suspended matter such as sanitary ceramic waste water, kaolin deep processing waste water and wafer grinding waste water. Background technique [0002] In the process of sanitary ceramics, wafer grinding, and kaolin deep processing, especially raw material refining and forming processes, a large amount of equipment cleaning wastewater and ground cleaning wastewater are generated. The wastewater has a high concentration of suspended matter, and the suspended matter has a high recovery value. At present, most of the wastewater treatment methods of this stock are to add a certain amount of coagulation and flocculation agents (such as PAC, PAM) to carry out solid-liquid separation after coagulation and sedimentation. After separation, the supernat...

AI Technical Summary

Problems solved by technology

Due to the addition of a certain amount of coagulation and flocculation agents in the wastewater treatment process, the performance of the mud is destroyed, the reuse value and efficiency of the mud are reduced, and the conductivity and salt content increase during the recycling of reclaimed water, which limits the return of reclaimed water. field of use

In order to improve the utilization rate of resources, that is, the comprehensive recycling and reuse of mud and cleaning water, many manufacturers have begun to use filter settings to separate and reuse mud and cleaning water. Currently, the filtration equipment with the best separation efficiency and separation effect It is a plate and frame filter press, but due to the unbalanced content of high-concentration suspended solids (slurry) in the cleaning wastewater and the large amount of wastewater, the proportion of high-concentration suspended solids (slurry) is relatively low, so the direct use of plate The separation effect and efficiency of frame filter press are not good. Under the premise of high operating cost investment, as well as the premise of consuming a lot of electric energy and filter cloth loss, the economic benefits obtained from mud recovery and cleaning water recovery and energy savings not only did not rise, but fell

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