Wastewater treatment and reuse technology for paper mill

A technology for wastewater treatment and paper mills. It is applied in the direction of processing wastewater treatment, water/sewage multi-stage treatment, flotation water/sewage treatment, etc. It can solve the problems that papermaking methods cannot be applied and cannot be applied.

Inactive Publication Date: 2009-12-02
CHINA BANKNOTE PRINTING & MINTING
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The disadvantage of this patent is that this technology is only applicable to the papermaking method of producing packaging paper from waste cardboard and waste paper fiber raw materials, but cannot be applied to the papermaking method of high-gra

Method used

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  • Wastewater treatment and reuse technology for paper mill
  • Wastewater treatment and reuse technology for paper mill
  • Wastewater treatment and reuse technology for paper mill

Examples

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Embodiment 1

[0111] Below in conjunction with accompanying drawing, content of the present invention is described in further detail:

[0112] Copying of commercial pulp boards such as cotton pulp boards, straw pulp boards, hemp pulp boards, coniferous wood pulp boards, and hardwood pulp boards, or the use of pulp from pulping workshops for the production of bond paper, high-grade anti-counterfeiting paper and other high-grade paper In the paper workshop, workshop wastewater is mainly produced by the fine pulp process, paper machine process, auxiliary material process, and broken paper treatment process. Refer to figure 1 ——As shown in the process flow chart of waste water recycling technology in the papermaking workshop, the wet long wire spraying of the paper machine and the vacuum roll, vacuum box and vacuum fan suction air-water separator to separate white water; pressure screen, slag removal and tailing Waste water; the excess white water in the white water circulation of the flow deli...

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PUM

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Abstract

The invention provides a wastewater treatment and reuse method for a paper mill. The method comprises the following steps: (a) physical treatment: providing wastewater from the paper mill, and removing the cellulose and other foreign impurities in the wastewater from the paper mill to obtain the wastewater from the paper mill after the physical treatment; (b) biochemical treatment: performing biochemical treatment and deposition to the paper mill wastewater obtained in the step (a) after the physical treatment to obtain safe pool water conforming to the required emission standard; and (c) advanced treatment: providing air-floatation water after super-efficient shallow air-floating treatment in a machine room and merging the air-floatation water with the safe pool water obtained in the step (b) to obtain intermediate water, and then performing intermediate water advanced treatment, i.e. adding drugs into the intermediate water, coagulating, depositing and filtering to obtain purified water; and performing fiber bunch or the biological film technical treatment to the purified water to obtain effluent.

Description

technical field [0001] The invention relates to a waste water treatment and reuse technology, in particular to a pulp and paper mill waste water reuse technology. Background technique [0002] my country is a country that is very short of water resources. The pulp and paper industry consumes a lot of water, and the average water consumption per ton of paper in my country is more than five times that of the international advanced level. A large amount of water consumption will inevitably lead to the discharge of a large amount of waste water, causing serious environmental pollution. When water use is constrained by resources, costs, and the environment, water conservation and pollution reduction are major issues that every enterprise must face and solve. [0003] The degree of reuse of pulping and papermaking wastewater varies greatly depending on the pulping method, pulp type, bleaching method, paper type, pulp properties, type and amount of chemical additives, etc. Many p...

Claims

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Application Information

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IPC IPC(8): C02F9/14C02F1/24C02F1/52C02F103/28
Inventor 李策马跃飞张业录朱平海
Owner CHINA BANKNOTE PRINTING & MINTING
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