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A kind of pretreatment method of paper mill wastewater

A paper mill and pretreatment technology, applied in the field of paper mill wastewater pretreatment, can solve problems such as substandard discharge and impact on the surrounding environment, and achieve the effects of saving operating costs, high on-site practicality, and saving floor space

Active Publication Date: 2017-04-05
TONGXIANG HENGYI PAPER PLASTIC
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, most large paper mills in China have wastewater treatment facilities, but some of them are directly discharged without treatment or fail to meet the standards. Some small paper mills have no wastewater treatment facilities at all, and the wastewater is directly discharged into surrounding rivers, causing damage to the surrounding environment. seriously affected

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Embodiment Construction

[0018] Such as figure 1 A pretreatment method for wastewater from a paper mill is shown. The treatment system used includes a regulating sump 1, a grid 2, a grit chamber 3, a physical filter 4, ice grid equipment 5, an electromagnetic adsorption pool 6, and an air flotation pool 7 . The waste water outlet of the paper mill is connected to the water inlet of the regulating sump 1 through a pipeline, and the water outlet of the regulating sump 1 is connected to the water inlet of the grid 2 through a pipeline, and the water outlet of the grid 2 is connected to the water inlet of the grit chamber 3 through a pipeline , the water outlet of the grit chamber 3 is connected to the water inlet of the physical filter tank 4 through a pipeline, the water outlet of the physical filter tank 4 is connected to the water inlet of the ice grid 5 through a pipeline, and the water outlet of the ice grid 5 is connected to the electromagnetic adsorption tank 6 through a pipeline The water inlet ...

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Abstract

The invention discloses a paper mill wastewater pretreatment method. Wastewater sequentially passes through a regulating water-collecting tank, a grille, a grit chamber, a physical filtering tank, an ice grille, an electromagnetic absorption tank and an air floatation tank. The low-energy-consumption environmentally-friendly ice grille device is adopted in the pretreatment method, is applied to a paper making wastewater treatment process for the first time, has obvious removal effect on the particular organic matter difficult to remove and small solid suspended matter in paper making wastewater and is free of chemical reagents. The removal rate of the suspended matter in the paper making wastewater treated by means of the method is up to 98.1%, the chroma removing rate is up to 95.1%, and the turbidity removing rate is up to 98.8%.

Description

technical field [0001] The invention relates to a method for pretreatment of paper mill wastewater, which belongs to the field of water treatment in environmental protection. Background technique [0002] With the continuous development of the economy and the continuous improvement of living standards, people pay more and more attention to the protection of the environment. According to relevant data, the annual sewage discharge in my country is about 3.9 tons, and it increases at a rate of 1%. my country is a large paper-making household, and the discharge of paper-making wastewater is large. At present, there are more than 10,000 large, medium and small paper mills in my country, and the annual wastewater discharge volume is as high as more than 4 billion m 3 , accounting for one-sixth of the total discharge of wastewater in the country, and the annual discharge of BOD in papermaking wastewater is more than 2 million tons, accounting for 25% of the BOD in the total discha...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C02F9/12C02F103/28
Inventor 瞿尧成张佳宁
Owner TONGXIANG HENGYI PAPER PLASTIC
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