Emulsifying liquid wastewater membrane treatment process

Abstract

The invention discloses an emulsifying liquid wastewater membrane treatment process. The process comprises the steps of pretreatment, metal tube type membrane ultrafiltration and organic membrane pretreatment. The process has the advantages that the problem that the current emulsifying liquid wastewater treatment has high cost, complex operation, low treatment efficiency and poor comprehensive recycling effect can be effectively solved so that the oil content of the treated emulsifying liquid wastewater is 10mg / l or less, the suspended substance (SS) content is 30mg / l or less and the chemical oxygen demand (CODcr) is 100mg / l or less, the problem that the emulsifying liquid wastewater is treated and discharged according to the related standard or is reused is fully solved; and the comprehensive utilization of the emulsifying oil is realized, the treatment process is efficiency and energy-saving, is easy to operate and use, the environmental pollution is reduced, the cost is low, and the process has great economic and social benefits.

Description

technical field [0001] The invention relates to a wastewater treatment process, in particular to an emulsion wastewater membrane treatment process. Background technique [0002] The emulsified liquid is prepared by diluting the emulsified oil with water as needed and then adding an emulsifier. The emulsified liquid mainly contains mineral oil, vegetable oil, surfactant and various additives with complex components. In the metal material processing and machinery manufacturing industries, a large amount of emulsion is used for lubrication and cooling during metal cutting, rolling, drawing and other processes. After being recycled many times, the emulsion will become invalid and deteriorate into waste water discharge. At present, the high-concentration and heavily emulsified oily wastewater discharged in my country's metal material processing and machinery manufacturing industries has not been well treated. The main reason is that with the improvement of technology, the stabil...

AI Technical Summary

Problems solved by technology

The traditional treatment process generally adopts demulsification treatment, and the low-concentration emulsion can basically meet the requirements; however, for high-concentration emulsion, the traditional process needs to increase the dosage, but it is still difficult to meet the discharge requirements, and the treatment cost of this method Higher, lower recycling efficiency

With the increasing requirements of national environmental protection, membrane treatment is gradually accepted, but the existing membrane treatment process of emulsion wastewater generally adopts organic membrane, which has poor pollution resistance, low concentration multiple, and is not resistant to high temperature and acid. Alkali, membrane replacement frequency is high, in order to solve the above problems, inorganic ceramic membranes are beginning to be used in emulsion treatment

Due to its special structure, the inorganic ceramic membrane solves the problems of high temperature resistance and acid resistance, but the inorganic ceramic membrane is easily broken, its channel is small, the concentration factor is low, the operation is unstable, it is difficult to clean, it cannot resist sudden cooling and heat, and the degree of automation and higher operating requirements

Images