Industrial wastewater treatment method and device

Abstract

The invention relates to an industrial wastewater treatment method and an industrial wastewater treatment device. The industrial wastewater is collected by using a collection tank of a workshop. With a centrifugal elevation pump, the wastewater is pumped into a treatment water tank of the industrial wastewater treatment device with a tubular membrane filtration assembly; sodium hydroxide or potassium hydroxide is added in a delivery pipe; sufficient reaction is carried out under the stirring of the centrifugal elevation pump, such that hydroxide deposit which is insoluble in water is produced; and the water obtained after reaction is filtered by using the industrial wastewater treatment device with the tubular membrane filtration assembly. The device comprises sequentially connected components of the collection tank, the delivery pipe, and a membrane filtration device. The elevation pump is arranged on the delivery pipe. The membrane filtration device comprises the treatment water tank. The membrane filtration assembly is arranged and immersed in the treatment water tank. The membrane filtration assembly is respectively connected with a pipe delivery system. An aeration device is arranged in the treatment water tank. The membrane filtration assembly is composed of a tubular membrane filtration unit. An opened frame is arranged on the outer periphery of the tubular membrane filtration unit. A tubular filtration membrane is arranged in a sealed state on a frame plane. A water outlet pipe is arranged on the frame. With the device, solid impurities can be effectively removed, and waste water can be really turned into a resource.

Description

technical field [0001] The present invention relates to a sewage treatment method, in particular to a method for recycling and treating industrial wastewater such as electroplating, chemical plating, and semiconductor packaging. method. The present invention also relates to an industrial waste water treatment device utilizing a tubular membrane filtration module. Background technique [0002] Industries such as electroplating, electroless plating, and semiconductor packaging are all industries that are very dependent on water resources, and are also industries that consume high water and high pollution. Especially in the case of limited water resources and increasing water pollution Great pressure is placed on the production and operation of enterprises. Therefore, the research and practice of water conservation and effective pollution control of these production enterprises will help to improve water efficiency, reduce water costs, and reduce environmental pollution. At ...

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Problems solved by technology

The electroplating wastewater treatment method disclosed in this patent adopts one-stage nanofiltration membrane filtration, two-stage brackish water reverse osmosis membrane filtration, and three-stage seawater reverse osmosis membrane filtration. The process is cumbersome, the operation energy consumption is high, and the water reuse rate is low. , only about 70%

In another patent application of the applicant entitled "A Clean Production Method for Treating Electroplating Wastewater by Nanofiltration Method", the application number is 200610096133.9, the publication number is CN1935678, and the publication date is March 28, 2007. The internationally advanced nanofiltration membrane is mainly used to intercept and concentrate metal ions above divalent, and the membrane permeate is directly used for rinsing the plated parts. The operating cost is lower than the previous method, the process is simple, the operation is convenient, and the investment is small. However, the operating pressure of nanofiltration membrane filtration is 1.8 to 2.2 MPa, and the operating energy consumption is relatively high.

[0009] The above-mentioned water treatment methods have the problems of large and complex structure of treatment facilities, large floor area, high investment and high energy consumption, and the treatment process usually needs to add a variety of chemicals to achieve metal ion precipitation and solid particle flocculation precipitation, thereby A large amount of harmful sludge is generated during the treatment process

In recent years, membrane methods have been used to treat electroplating wastewater. The membrane filtration systems used are mainly reverse osmosis and nanofiltration systems, which require pressurized filtration, high energy consumption for operation, and high maintenance costs.

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