Recycling and treating process for reclaimed water and combined apparatus used therein
A technology of treatment process and combined equipment, applied in water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc., can solve problems such as easy clogging, thin membrane filaments, and high operating costs
Inactive Publication Date: 2017-03-15
SHANGYU HUAJIE ENVIRONMENTAL PROTECTION
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Problems solved by technology
At present, the combination of ultrafiltration + reverse osmosis membrane device is commonly used in the treatment process of reclaimed water, but the membrane filament of ultrafiltration is thin and easy to break, and the quality of influent water is high, otherwise it will be easily blocked, resulting in higher operating costs
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[0017] Through the investigation of existing reclaimed water reuse treatment projects, it is found that most of the ultrafiltration membranes have problems such as broken wires, clogging, and end-of-life; at the same time, it is also found that the life of the reverse osmosis membrane core is Shortened to 3 to 6 months, resulting in large maintenance investment and high operating costs. In this regard, the present invention proposes a treatment process for reclaimed water, which can solve the problems caused by ultrafiltration. After the implementation, it can reduce the occupied area, simplify the operation, and prolong the service life. At the same time, the construction investment is low and the operation cost is low. This example takes a printing and dyeing factory as an example. The existing pretreatment scale is 2000t / d, and the COD concentration of the reclaimed water is 198mg / L and pH 7.5. Water Quality Standards for Reuse Water”, the water production efficiency reache...
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The invention relates to a recycling and treating process for reclaimed water and a combined apparatus used therein, belonging to the technical field of recycling and treating of reclaimed water. The recycling and treating process and the combined apparatus treat pre-treated reclaimed water with a COD concentration of 200 mg / L and a pH value of 6.5 to 9 through an optimized combination of a tubular membrane device, a security filter and a reverse osmosis membrane device; and produced water has a quality meeting requirements prescribed in Water Quality Standards for Industrial Reuse Water and can be directly recycled as water for production process, and water production efficiency reaches 65% or above, so production needs are met. Compared with the prior art, the invention has the following advantages: process flow is short; an in-depth treating unit is omitted, and problems caused by filament breakage of an ultrafiltration membrane can be avoided; the service life of a reverse osmosis membrane is prolonged; and the apparatus has the advantages of a small land area, reduced construction investment, easiness in manufacturing, simple management and operation, low operation cost, conservation of energy, consumption reduction and the like. Thus, the recycling and treating process and the combined apparatus have creativity, practicality and good implementation effect, can be applied to treatment of reclaimed water from a variety of industries and have good application and promotion prospects.
Description
technical field [0001] The invention relates to a reclaimed water treatment process and combined equipment thereof, belonging to the technical field of reclaimed water treatment. Background technique [0002] Due to the growth of the world's population and the development of the social economy, human water consumption has increased dramatically, and the original clean water resources have been polluted by human activities, making the use of water resources on the earth increasingly scarce. Insufficient water supply has caused huge losses to urban industries, and at the same time caused many difficulties and inconveniences to the lives of urban residents. Therefore, it is necessary to speed up the sustainable use of water resources, rationally allocate sewage resources, and alleviate the shortage of urban water resources. Reuse of reclaimed water is an important method of recycling sewage. It can not only reduce environmental pollution, but also increase the amount of availab...
Claims
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Inventor 黄祖强朱华土朱敏杰
Owner SHANGYU HUAJIE ENVIRONMENTAL PROTECTION