Device for treating wastewater produced in production process of alkaline peroxide mechanical pulp (APMP)

A treatment device and technology for pulping wastewater, which are applied in the fields of water/sewage multi-stage treatment, water/sludge/sewage treatment, chemical instruments and methods, etc. problems, to prevent sludge bulking, reduce load, and save energy

Inactive Publication Date: 2012-08-01
中科天龙(厦门)环保股份有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The invention provides a treatment device for APMP pulping wastewater to solve the problems of easy clogging of the fil

Method used

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  • Device for treating wastewater produced in production process of alkaline peroxide mechanical pulp (APMP)
  • Device for treating wastewater produced in production process of alkaline peroxide mechanical pulp (APMP)
  • Device for treating wastewater produced in production process of alkaline peroxide mechanical pulp (APMP)

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Embodiment Construction

[0021] Specific embodiments of the present invention will be described below with reference to the accompanying drawings.

[0022] refer to figure 1 , a treatment device for APMP pulping wastewater consists of a grid channel 1 connected in sequence, a regulating primary sedimentation tank 2, a shallow air flotation device 3, an intermediate pool 4, a cooling tower 5, a UASB sludge bed 6, and a hydrolysis acidification tank 7. It is composed of intermediate sedimentation tank 8, CASS biochemical tank 9, secondary sedimentation tank 10 and deep oxidation tank 11. The secondary sedimentation tank 8 is connected with a sludge concentration tank 12, and the sludge concentration tank 12 is connected to a belt dehydrator 13.

[0023] The chemical-mechanical pulp wastewater flows into the grid tank 1 through the sewage pipes, and after the grid decontamination machine removes fibers and a large amount of suspended matter, it enters the adjustment primary sedimentation tank 2 to adjust...

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Abstract

The invention discloses a device for treating wastewater produced in the production process of alkaline peroxide mechanical pulp (APMP). The device consists of a grid trench, an adjustment primary settlement tank, a shallow layer air floatation device, a middle water tank, a cooling tower, an upflow anaerobic sludge blanket (UASB), a hydrolysis and acidification tank, a middle settlement tank, a cyclic activated sludge system (CASS) biochemical tank, a secondary settlement tank and an advanced oxidation tank which are sequentially connected; the secondary settlement tank is connected with a sludge concentration tank; the sludge concentration tank is connected with a belt dehydrator; the CASS biochemical tank comprises an organism selection area adopting an anaerobic environment, a facultative area which has the effect of buffering water quality, and a main reaction area for degrading organic matter; the main reaction area is provided with an oxygen supply system which ensures long sludge age and low sludge load; and an ozone composition is arranged in the advanced oxidation tank to reduce chemical oxygen demand (COD). The UASB, hydrolysis and acidification, CASS and advanced oxidation process combined device is adopted, so that wastewater produced in the production process of APMP can be effectively treated, and the index of effluent reaches the requirement of GB3544-2008.

Description

technical field [0001] The invention relates to the field of industrial wastewater treatment, in particular to a treatment device for APMP pulping wastewater. Background technique [0002] The principle of APMP (Alkaline Peroxide Mechanical Pulping) pulping is to extrude the raw material with a high compression ratio screw before refining, to strengthen the soaking of the liquid medicine, and then add chemicals such as hydrogen peroxide and sodium hydroxide to carry out the bleaching reaction. , thus saving a series of equipment for bleaching after refining. The APMP method is characterized by combining pulping and bleaching, the production process is simple, the production cost is low, the pulp yield is high, the strength is good, the whiteness is high, the utilization rate of fiber raw materials is improved, and the consumption of fiber raw materials is directly reduced. It has developed rapidly in recent years and has become the main method of high-yield pulping in t...

Claims

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Application Information

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IPC IPC(8): C02F9/14
Inventor 黄晓东王海滨傅太平
Owner 中科天龙(厦门)环保股份有限公司
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