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Wastewater recovery treatment process for paper mill

A technology of wastewater recovery and treatment process, applied in the process of wastewater treatment, water/sewage treatment, biological water/sewage treatment, etc., can solve the problems of low treatment efficiency, environmental pollution, confusion of treatment steps, etc. The effect of reducing production costs and reducing waste water

Inactive Publication Date: 2017-02-15
张日龙
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Therefore, the existing papermaking wastewater treatment process has chaotic treatment steps, low treatment efficiency, serious environmental pollution, and immature material recovery technology, which is not conducive to cost saving

Method used

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  • Wastewater recovery treatment process for paper mill
  • Wastewater recovery treatment process for paper mill
  • Wastewater recovery treatment process for paper mill

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] like figure 1 Shown, a kind of paper mill wastewater recovery treatment process comprises the following steps:

[0017] 1) Intercept a large amount of fibers, fiber fines and plant debris through the grille, and pick up the fibers, fiber fines and plant debris through the scooping machine to keep the grid flowing smoothly, and intercept the fibers, fiber In the sewage drainage adjustment tank after fine materials and plant debris;

[0018] 2) The sewage introduced into the adjustment tank is sprayed with a large number of micro-bubbles through the air flotation device, so that the suspended solids in the sewage can be concentrated for preliminary treatment, and at the same time, the oil in the sewage can float on the surface of the sewage under the action of the micro-bubbles , and then the oil on the surface of the sewage is scooped up by a fishing machine, the sewage treated with oil is drained into the primary sedimentation tank, and 120 parts of inorganic flocculan...

Embodiment 2

[0026] like figure 1 Shown, a kind of paper mill wastewater recovery treatment process comprises the following steps:

[0027] 1) Intercept a large amount of fibers, fiber fines and plant debris through the grille, and pick up the fibers, fiber fines and plant debris through the scooping machine to keep the grid flowing smoothly, and intercept the fibers, fiber In the sewage drainage adjustment tank after fine materials and plant debris;

[0028] 2) The sewage introduced into the adjustment tank is sprayed with a large number of micro-bubbles through the air flotation device, so that the suspended solids in the sewage can be concentrated for preliminary treatment, and at the same time, the oil in the sewage can float on the surface of the sewage under the action of the micro-bubbles , and then the oil on the surface of the sewage is scooped up by a fishing machine, the sewage treated with oil is drained into the primary sedimentation tank, and 150 parts of inorganic flocculan...

Embodiment 3

[0036] like figure 1 Shown, a kind of paper mill wastewater recovery treatment process comprises the following steps:

[0037] 1) Intercept a large amount of fibers, fiber fines and plant debris through the grille, and pick up the fibers, fiber fines and plant debris through the scooping machine to keep the grid flowing smoothly, and intercept the fibers, fiber In the sewage drainage adjustment tank after fine materials and plant debris;

[0038] 2) The sewage introduced into the adjustment tank is sprayed with a large number of micro-bubbles through the air flotation device, so that the suspended solids in the sewage can be concentrated for preliminary treatment, and at the same time, the oil in the sewage can float on the surface of the sewage under the action of the micro-bubbles , and then the oil on the surface of the sewage is scooped up by a fishing machine, and the oily sewage is drained into the primary sedimentation tank, and 180 parts of inorganic flocculants are a...

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Abstract

The invention discloses a wastewater recovery treatment process for a paper mill. The process includes steps: 1) intercepting and taking out fibers, fiber fines and plant debris in sewage by grilles; 2) sequentially subjecting the sewage to oily waste treatment and suspension treatment through a regulating tank and a primary sedimentation tank; 3) subjecting the sewage to aeration treatment through a biological contact oxidation tank to obtain clear water; 4) sterilizing the clear water through a secondary sedimentation tank; 5) recycling the qualified treated water. By the wastewater recovery treatment process for the paper mill, sequential treatment can be realized according to components of papermaking wastewater, treatment efficiency can be improved, environment pollution is abated, treated water can be recovered, and cost saving is realized beneficially.

Description

technical field [0001] The invention relates to a process for recycling and treating waste water in paper mills. Background technique [0002] Paper is closely related to us humans and is indispensable to human society. With the development of human society, the paper industry has been greatly developed, but it has also caused great damage to human health and the ecological environment. According to statistics in recent years, the sewage discharge of the national pulp and paper industry accounts for about 10%-12% of the total sewage discharge in the country, ranking third, and the chemical oxygen demand in the discharged sewage accounts for about 40%-45%. , ranking first. The serious pollution and harm of paper industry wastewater has aroused widespread concern. [0003] The paper industry is an industry with large water consumption and high pollution. Due to the high concentration of pollutants in papermaking wastewater and the difficulty of treatment, all countries hav...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C02F9/14C02F103/28
CPCC02F9/00C02F1/001C02F1/24C02F1/40C02F1/50C02F1/5236C02F3/10C02F3/14C02F2001/007C02F2103/28
Inventor 张日龙
Owner 张日龙
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