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Yvlei Pump Industry (Dalian) Co., Ltd.

Contact: manager geng

Telephone: 0411-84807725

Mail box: 315548210 @qq.com

Address: room 819, no. 60-1, haixing street, dalian free trade zone, China (liaoning) pilot free trade zone

Website:http://www.yvlei.cn

Website: en.yvlei.cn

What happens to papermaking sewage treatment equipment?

2019-12-03

Integrated prefabricated pumping station


Paper industry is one of the industries with high energy consumption and serious environmental pollution. The characteristics of environmental pollution caused by the waste water discharge is large, biochemical oxygen demand (BOD) is high, the waste water in the fiber suspended solids, mainly containing hemicellulose, lignin, inorganic salts, inorganic fillers, printing ink, dye and containing sulfur wastewater and waste gas discharge, and odor, with color. Lignin and hemicellulose mainly form COD and BOD of wastewater. Fine fibers, inorganic fillers, etc. to form SS; Ink, dye and other main chromaticity and COD. Paper waste water treatment equipment can be used.


Papermaking wastewater treatment equipment can be divided into four categories according to the concentration, property, flocculation performance and precipitation of suspended particles in water:


1, papermaking sewage treatment equipment free precipitation suspended matter concentration is low, the precipitation process does not adhere to each other, does not change the shape size and density of particles, such as the sedimentation of particles in the sand pool.


2. Coagulation or flocculation can occur in the process of flocculation and precipitation of paper wastewater treatment equipment. The settling rate of floating particles with low concentration increases with depth due to the increase of flocculation mass. The precipitation of water particles after chemical flocculation is flocculation precipitation. Flocculation precipitation is usually divided into several layers and the free settlement velocity formula is used to calculate the particle settlement in each layer.


3. After the concentration of suspended solids in the precipitation wastewater at the interface of the papermaking sewage treatment equipment increases to a certain value, due to the mutual interference between particles, all particles precipitate as a whole in clumps, forming a clear muddy water interface between the muddy water. At this point, the settling rate of all particles is the same, and precipitation at the same rate, the lower part of activated sludge precipitation belongs to this type.


4, paper sewage treatment equipment compaction. Precipitation occurs during the settling process of high-concentration floating particles. Since SS is very high, the particles gather into a mass structure and support each other. The water between the lower particles is in the gravity of the upper particles. Under the action of water depth and its own gravity, the sludge is pressed out, so that the sludge can be concentrated, the concentration process in the secondary sedimentation tank sludge bucket and the concentration process of the sludge in the concentration tank there is compression and precipitation, generally using the formula of area interface settlement rate.


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Address: room 819, no. 60-1, haixing street, dalian free trade zone, China (liaoning) pilot free trade zone

Phone: geng manager 0411-84807725

Mail box: 315548210 @qq.com

Web site:http://www.yvlei.cn

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