Filter back washing water recovery processing method and membrane filtration system thereof

A technology for backwashing water and recycling treatment, which is applied in the fields of water/sewage multi-stage treatment, light water/sewage treatment, water/sludge/sewage treatment, etc. The effect of reducing water purification load, stabilizing water quality, and improving water quality safety
CN101863577AActive Publication Date: 2010-10-20SHENZHEN WATER GRP CO LTD
4 Cites 18 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHENZHEN WATER GRP CO LTD
Publication Date
2010-10-20

Smart Images

  • Figure 1
    Figure 1
  • Figure 2
    Figure 2
  • Figure 3
    Figure 3
Patent Text Reader

Abstract

The invention discloses a filter back washing water recovery processing method and a membrane filtration system thereof. The filter back washing water recovery processing method comprises: 1. pretreating; 2. filtering membranes; and 3. sterilizing. The membrane filtration system utilizes a submersible pump to pump back washing water into a water inlet tank, and water is fetched from the water inlet tank by a water inlet pump and is filtered after being fed to a membrane assembly; part of filtered clean water enter the back washing water tank to participate in the back washing process and is reversely pumped into the membrane assembly by a back washing water pump; and compressed air is blasted in by a pressure tank and an air compressor arranged on the inlet end of the feed liquid of the membrane assembly to clean the membrane assembly. The invention not only improves recycling water quality safety of back washing water in filters in waterwork but also reduces the influence of safety risk when being directly used on a main technology in the waterwork. The invention has the recovery rate of back washing water of 95%, improves the recycling water quality safety of back washing water in filters in the waterwork and lowers the pure water load of main technology.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to the field of recovery and treatment of filter backwash water. In particular, the invention relates to a method for recovering and treating backwash water in a filter tank and a membrane filtration system thereof. Background technique

[0002] With the continuous development of urban construction and environmental protection, the pollution of production wastewater discharged from water supply plants has attracted more and more attention. The increasing pressure on water resources has made the reuse of water plant production wastewater a mainstream. The treatment of sludge water from water supply plants started relatively late in China, so at present, less than 5% of my country's surface water plants have sludge water treatment and recycling facilities, and new water plants tend to add recycling facilities. Recycling and reuse of wastewater in water purification plants saves fresh water resources and has the significant advanta...

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