Microporous film filter for processing heavy metal wastewater

A microporous film and heavy metal technology, which is applied in fixed filter element filters, filtration and separation, chemical instruments and methods, etc., can solve the problem of high operating costs per ton of water, high requirements for precipitation reaction conditions, and secondary pollution in chemical flocculation and sedimentation methods. The threat can not be ignored and other issues, to achieve the effect of good chemical stability, novel appearance, low friction coefficient
CN101468264AActive Publication Date: 2009-07-01SHANGHAI TONGJI CLEARON ENVIRONMENTAL PROTECTION EQUIP ENG CO LTD
0 Cites 5 Cited by

Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
SHANGHAI TONGJI CLEARON ENVIRONMENTAL PROTECTION EQUIP ENG CO LTD
Publication Date
2009-07-01

Smart Images

  • Figure 1
    Figure 1
Patent Text Reader

Abstract

The invention relates to a millipore membrane filter for treating heavy water waste water, which belongs to the technical field of wastewater treatment. The filter comprises a tank body, a stainless steel tube sheet, a bulky polyfluortetraethylene membrane filter bag, filter bag support cage frameworks, an acid feeding flexible valve, a reflux flexible valve, a backsurge flexible valve, a mud discharge flexible, a cleaning agent liquid feeding valve, an air electromagnetic valve and an exhaust electromagnetic valve, wherein the bulky polyfluortetraethylene membrane bag is sleeved on the filter bag support cage framework, and all filter bag support cage frameworks are fixed on the stainless steel tube sheet through screws. The stainless steel tube sheet divides the tank body into two parts, wherein the upper part is a clean water area, and the lower part is a waste liquid area (a filter area). The filter has a simple structure, and takes a membrane made of a bulky polyfluortetraethylene material as a filter material, so as to achieve the real surface filter effect, and completely retain impurities in an acid liquid on the surface of the membrane. Because the selected membrane has excellent acid resistance, hydrophobias and smaller friction coefficient, the block phenomenon of the filter material can not occur.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to equipment in the technical field of wastewater treatment, in particular to a microporous membrane filter for treating heavy metal wastewater. The invention can be applied to the treatment of heavy metal wastewater and HNO 3 +HF mixed acid pickling wastewater, etc. Background technique

[0002] In the previous wastewater treatment process, for some heavy metal d-block elements, such as Cd 2+ 、Cr 3+ 、Cu 2+ , Fe 2+ , Fe 3+ , Hg 2+ , Pb 2+ , Zn 2+ etc. and fluorine-containing wastewater are mainly treated by alkali neutralization precipitation method to form hydroxide precipitation with very fine particles (a considerable part is about 1 micron) and CaF 2 Such precipitation is separated by physical separation method or chemical flocculation precipitation method.

[0003] Physical separation methods are mostly based on physical methods such as filtration and centrifugation. Due to the limitation of filter materials, small ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More