Ultrafiltration membrane treatment system and treatment process of heavy metal wastewater
A technology of treatment system and treatment process, which is applied in the field of heavy metal wastewater ultrafiltration membrane treatment system and its treatment process, can solve the problems such as difficult recovery of pollution in the inner layer of the support layer, short service life of membrane elements, increased operating pressure, etc., to achieve Low cost, convenient membrane cleaning, and reduced floor space
Inactive Publication Date: 2012-11-28
上海膜达克环保工程有限公司
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Problems solved by technology
However, the biggest problem with tubular microfiltration membrane technology is that the cost of the membrane group is too high, and it will only be used when the sewage has reuse value. The amount is low, which reduces the efficiency, and it is difficult to recover the inner layer of the support layer during cleaning, resulting in a short service life of the membrane element, usually only 1-2 years
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[0033] The scheme of the present invention will be further described below in conjunction with the accompanying drawings.
[0034] Such as figure 1 The heavy metal wastewater ultrafiltration membrane treatment system shown includes a wastewater balance tank 1, a first pH adjustment tank 2, a second pH adjustment tank 3, a wastewater concentration tank 4, and a horizontally placed tubular membrane module 5, a tubular membrane module 5 There are several tubular ultrafiltration membrane elements 51 arranged horizontally and arranged in parallel. The inner diameter of each tubular ultrafiltration membrane element 51 is 4-12 mm. The upper part of the waste water balance tank 1 is provided with a balance tank water inlet 6. The pool water inlet 6 is also provided with a second fine grid 21 less than or equal to 1mm, between the waste water regulating pool 1 and the first PH regulating pool 2, between the first PH regulating pool 2 and the second PH regulating pool 3, Between the se...
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Abstract
The invention provides an ultrafiltration membrane treatment system and treatment process of heavy metal wastewater. The treatment process comprises the following steps: firstly carrying out water quality and quantity balance adjustment and pH adjustment of the heavy metal wastewater, adding chemical agents for coagulation, entering a tubular membrane component with a built-in tubular ultrafiltration membrane element for membrane filtration treatment, leading out filtrate, returning the concentrate to a concentrating tank, and then entering an ultrafiltration membrane treatment for circulating treatment to obtain final treatment effluent the water quality index of which is far lower than the national discharge standard. In the ultrafiltration membrane treatment system and treatment process of the heavy metal wastewater provided by the invention, by adopting the tubular ultrafiltration membrane component, the filtration flux is large, the efficiency is high, the cost is low, the membrane element has long service life, the membrane is convenient to clean, and the equipment occupation space is greatly reduced.
Description
technical field [0001] The invention relates to a heavy metal wastewater ultrafiltration membrane treatment system and a treatment process thereof. Background technique [0002] Heavy metal wastewater pollution includes various heavy metal pollution in electronics / printed circuit boards (PCB), metal plating heavy metal wastewater pollution, metal surface treatment wastewater metal pollution, steel manufacturing wastewater pollution, battery manufacturing nickel-cadmium heavy metal pollution, etc. Others include river pollution (such as the high sediment concentration of the Yellow River water), yin and yang resin softening water concentrate pollution (containing high concentrations of alkali metals and alkaline earth metal substances), high concentrations of COD and BOD substances in soybean products, reverse osmosis RO concentrate Medium and high concentration of anions and cations, etc. [0003] For the removal and treatment of these heavy metal wastewater pollutants, the...
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IPC IPC(8): C02F9/04
Inventor 向阳罗春译
Owner 上海膜达克环保工程有限公司