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Zero-emission treatment method for wastewater of chemi-mechanical pulp

A treatment method, chemical mechanical technology, applied in chemical instruments and methods, processing wastewater treatment, heating water/sewage treatment, etc. The effect of good social benefit

Active Publication Date: 2011-06-15
SHANDONG TAIYANGZHIYE +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] APMP pulping wastewater belongs to high-concentration organic wastewater, which is generally treated by anaerobic-aerobic biochemical treatment method, but the treatment process involves many and scattered objects, complex production process, and a long time for biological and chemical equilibrium , has the characteristics of large hysteresis, nonlinearity, and randomness, and the labor intensity of wastewater treatment monitoring personnel is very high
Moreover, this method cannot effectively solve the problem of high COD in APMP pulping wastewater, so inventing a new wastewater treatment method to effectively solve the problem of high COD in drainage and effectively prevent and control environmental pollution has become an urgent problem to be solved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] The zero-discharge treatment method of chemical mechanical pulp wastewater includes a distillation concentration process and an alkali recovery process, which are the following specific steps:

[0015] (1) Distillation and concentration: The waste water with a concentration of 1.5% from the chemical pulp system enters the bottom of the evaporator after heat treatment, and is sent to the sewage distribution nozzle on the top of the evaporator by a circulating pump, and the sewage is evenly distributed from the top of the evaporator by the distribution nozzle Distributed down the evaporating plate. There are two circulation areas inside the evaporator. During the process of evaporation and concentration, the sewage circulates in these two areas. The concentration of sewage in the first circulation area reaches 5%, and when the concentration of the second area reaches 12%, it is sent to Alkali recovery workshop and mixed with cooking waste liquid produced by chemical pulpi...

Embodiment 2

[0018] The zero-discharge treatment method of chemical mechanical pulp wastewater includes a distillation concentration process and an alkali recovery process, which are the following specific steps:

[0019] (1) Distillation and concentration: The waste water with a concentration of 1.7% from the chemical pulp system enters the bottom of the evaporator after heat treatment, and is sent to the sewage distribution nozzle on the top of the evaporator by a circulating pump, and the sewage is evenly distributed from the top of the evaporator by the distribution nozzle Distributed down the evaporating plate. There are two circulation areas inside the evaporator. During the process of evaporation and concentration, the sewage circulates in these two areas. The concentration of sewage in the first circulation area reaches 7%, and when the concentration in the second area reaches 13%, it is sent to Alkali recovery workshop and mixed with cooking waste liquid produced by chemical pulpi...

Embodiment 3

[0022] The zero-discharge treatment method of chemical mechanical pulp wastewater includes a distillation concentration process and an alkali recovery process, which are the following specific steps:

[0023] (1) Distillation and concentration: Wastewater with a concentration of 2.0% from the chemical-mechanical pulp system enters the bottom of the evaporator after heat treatment, and is sent to the sewage distribution nozzle on the top of the evaporator by a circulating pump, and the sewage is evenly distributed from the top of the evaporator by the distribution nozzle Distributed down the evaporating plate. There are two circulation areas inside the evaporator. During the process of evaporation and concentration, the sewage circulates in these two areas. The concentration of sewage in the first circulation area reaches 8%, and when the concentration of the second area reaches 15%, it is sent to Alkali recovery workshop and mixed with cooking waste liquid produced by chemical...

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PUM

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Abstract

The invention belongs to the field of papermaking wastewater treatment, and in particular relates to a zero-emission treatment method for wastewater generated by preparing alkaline peroxide mechanical pulp (APMP). The method comprises the following steps of: a distillation and concentration process and an alkali recycling process. The method has the advantages that: a problem that biochemical treatment cannot reduce the chemical oxygen demand (COD) of the wastewater generated by making the APMP and cannot make the wastewater generated by making the APMP reach the emission standard is solved, and the method has good social benefit. The condensate water generated through evaporation can be totally recycled to serve as clear water to be applied to chemical mechanical pulp shops, and certain economic benefit is achieved.

Description

technical field [0001] The invention belongs to the field of papermaking wastewater treatment, in particular to a treatment method for preparing alkaline hydrogen peroxide mechanical pulp (APMP) wastewater. Background technique [0002] APMP pulping wastewater belongs to high-concentration organic wastewater, which is generally treated by anaerobic-aerobic biochemical treatment method, but the treatment process involves many and scattered objects, complex production process, and a long time for biological and chemical equilibrium , has the characteristics of large hysteresis, non-linearity and randomness, and the labor intensity of wastewater treatment monitoring personnel is very high. And this method cannot effectively solve the problem of high COD in APMP pulping wastewater, so inventing a new wastewater treatment method to effectively solve the problem of high COD in drainage and effectively prevent and control environmental pollution has become an urgent problem to be s...

Claims

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Application Information

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IPC IPC(8): C02F1/04C01D1/28C02F103/28
Inventor 应广东陈克复刘泽华乔军陈昭军李军曹衍军安庆臣李明阳
Owner SHANDONG TAIYANGZHIYE
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