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Method for controlling ultrafiltration element pollution in water treatment

A technology for ultrafiltration filter elements and pollution control, applied in water/sewage treatment, multi-stage water/sewage treatment, water/sludge/sewage treatment, etc., can solve problems such as ultrafiltration membrane pollution and ultrafiltration filter element pollution, and achieve Large economic benefits, improved cleaning effect, and improved water production

Active Publication Date: 2018-06-19
DATONG COAL MINE GRP
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Problems solved by technology

[0003] In order to solve the problem of ultrafiltration membrane pollution in the water treatment process, the present invention provides a pollution control method for ultrafiltration filter elements in water treatment

Method used

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  • Method for controlling ultrafiltration element pollution in water treatment
  • Method for controlling ultrafiltration element pollution in water treatment

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Embodiment Construction

[0037] The present invention will be further described below in conjunction with specific examples.

[0038] When one of the following situations occurs, the ultrafiltration filter element needs to be cleaned:

[0039] 1. Under normal pressure, the permeate flow rate drops to 15-20% of the normal value;

[0040] 2. Normal water flow rate, water supply pressure increased by 10-15%;

[0041] 3. The water quality of the product decreases, and the bacteria increase by 10%;

[0042] 4. The operating pressure has increased by 10-15%.

[0043] A method for controlling pollution of an ultrafiltration filter element in water treatment, comprising pretreatment before water filtration and membrane washing after pollution; as figure 2 As shown, the pretreatment is to add a flocculation device before the mechanical filter, and the raw water is treated with a flocculant in the flocculation device; the membrane flushing is to use a cleaning water tank arranged in parallel with the revers...

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Abstract

The invention discloses a method for controlling ultrafiltration element pollution in water treatment and relates to the field of purification treatment of used water. A pretreatment process is addedin an existing reverse osmosis water purification technology, and meanwhile, an ultrafiltration element cleaning method is improved. As for pretreatment, a flocculation device is additionally added infront of a mechanical filtration device. The ultrafiltration element cleaning method, to be specific, is a physical and chemical washing method which sequentially uses an alkali cleaning method, an acid cleaning method and an oxidant cleaning method. The alkali cleaning method is to perform forward and reverse washing on an ultrafiltration element with sodium hydroxide in strong alkali to removeorganic impurities and oil; the acid cleaning method is to remove inorganic impurities in water with hydrochloric acid; the oxidant cleaning method aims to kill bacteria and remove dirt. With the adoption of the method, the service life of the ultrafiltration element is prolonged on the basis of the prior art, the produced water quality is improved, waste of the water resource is avoided, and greater economic benefits are created.

Description

technical field [0001] The invention relates to the field of pollution control of filter elements in the field of water treatment, in particular to a pollution control method for ultrafiltration filter elements in water treatment, which is applicable to the pollution and prevention of ultrafiltration filter elements in all water plants using ultrafiltration filter elements. Background technique [0002] Most water plants adopt the international advanced reverse osmosis process, the specific process is as follows: figure 1 As shown, the reverse osmosis device is the heart of the whole process, which directly affects the water yield and water quality, and the ultrafiltration device is the brain of the process, responsible for the reverse osmosis water inflow. After some water plants have been in operation for a long time, the water production and water quality have declined. If the method of replacing the ultrafiltration filter element is adopted, the price of a hollow fiber ...

Claims

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Application Information

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IPC IPC(8): B01D61/14B01D65/02C02F9/04
CPCB01D61/145B01D65/02C02F1/444C02F1/56C02F9/00C02F2001/007
Inventor 刘艳梅陈杰连有郤宝厚陈文全
Owner DATONG COAL MINE GRP
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