An efficient and recyclable solid-liquid separation method for industrial wastewater

Abstract

The invention relates to an efficient and recyclable solid-liquid separation method for industrial waste water, comprising the following specific steps: S1: waste water collection; S2: passing through a vibrating screen; S3: waste water stratification, and separating the waste water after impurity removal into The upper layer and the lower layer of concentrated sludge, the concentration of suspended solids in the upper layer is controlled below 1000ppm, and the water content of the lower layer of concentrated sludge is not more than 96%; S4: solid-liquid separation, S41: send the upper layer to pressure filtration The equipment performs solid-liquid separation, and the separated filtrate is reused, and the suspended solids are intercepted; S42: use bottom sludge as feed material, and send the lower concentrated sludge with a moisture content of no more than 96% to the filter press equipment for continuous solidification. Liquid separation work. The invention can not only effectively recover the mud and cleaning water comprehensively, but also can effectively and greatly improve the recovery efficiency and recovery effect, and can effectively reduce the cost of recovery, thereby generating sufficient economic benefits and improving resource utilization.

Description

Technical field [0001] The present invention relates to an industrial recyclable waste efficient solid-liquid separation method, which is mainly used in industrial waste water treatment waste water and sanitary ceramics, kaolin deep processing wastewater and wastewater wafer polishing high concentration of suspended solids. Background technique [0002] In sanitary ceramics, wafer grinding, deep processing of kaolin, a large number of refining raw materials and equipment, particularly the washing wastewater generated molding step, floor cleaning waste water, the waste water having high concentrations of suspended solids, suspended matter and has high recovery value. The current treatment of wastewater stock mostly mixed using a certain amount of flocculating agent (such as PAC, PAM) for solid-liquid separation after the coagulation sedimentation, the supernatant was separated after treatment and reuse, the conditioned slurry pressure filter cake Sinotrans. Since the waste water t...

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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