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Method for utilizing low-concentration acetic acid wastewater

A low-concentration acetic acid and waste water technology, applied in chemical instruments and methods, water pollutants, water/sewage multi-stage treatment, etc., can solve the problems of strict operation requirements, high equipment investment cost, large floor area, etc., and achieve treatment Good effect, safe and stable operation, high processing effect

Active Publication Date: 2014-02-19
武汉旭日华环保科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

From the analysis of the above-mentioned disclosed technical solutions, it can be known that the existing technical methods have disadvantages such as high equipment investment costs, strict operation requirements, and large floor space.

Method used

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  • Method for utilizing low-concentration acetic acid wastewater

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Embodiment 1: it comprises the following steps:

[0020] (1) Filtration treatment: first filter and remove acetic acid wastewater;

[0021] (2) Neutralization treatment: Add potassium hydroxide to the filtered acetic acid wastewater for neutralization reaction, use a mixer to stir the acetic acid wastewater and potassium hydroxide to fully mix, acetic acid and potassium hydroxide react to form potassium acetate, and adjust the concentration of acetic acid wastewater pH to 8;

[0022] (3) Concentration treatment: the acetic acid waste water obtained after neutralization is passed to the cooling water tower to replenish water for the cooling water tower. With the operation of the cooling water tower system, the concentration of potassium acetate in the cooling water of the cooling water tower increases;

[0023] (4) Evaporation and crystallization: After the potassium acetate in the cooling water of the cooling tower reaches 50g / L, the obtained cooling water is evaporate...

Embodiment 2

[0024] Embodiment 2: it comprises the following steps:

[0025] (1) Filtration treatment: first filter and remove acetic acid wastewater;

[0026] (2) Neutralization treatment: Add potassium hydroxide to the filtered acetic acid wastewater for neutralization reaction, use a mixer to stir the acetic acid wastewater and potassium hydroxide to fully mix, acetic acid and potassium hydroxide react to form potassium acetate, and adjust the concentration of acetic acid wastewater pH to 7;

[0027] (3) Concentration treatment: the acetic acid waste water obtained after neutralization is passed to the cooling water tower to replenish water for the cooling water tower. With the operation of the cooling water tower system, the concentration of potassium acetate in the cooling water of the cooling water tower increases;

[0028] (4) Evaporation and crystallization: After the potassium acetate in the cooling water of the cooling tower reaches 2700g / L, the resulting cooling water is evapor...

Embodiment 3

[0029] Embodiment 3: it comprises the following steps:

[0030] (1) Filtration treatment: first filter and remove acetic acid wastewater;

[0031] (2) Neutralization treatment: Add potassium hydroxide to the filtered acetic acid wastewater for neutralization reaction, use a mixer to stir the acetic acid wastewater and potassium hydroxide to fully mix, acetic acid and potassium hydroxide react to form potassium acetate, and adjust the concentration of acetic acid wastewater pH to 9;

[0032] (3) Concentration treatment: the acetic acid waste water obtained after neutralization is passed to the cooling water tower to replenish water for the cooling water tower. With the operation of the cooling water tower system, the concentration of potassium acetate in the cooling water of the cooling water tower increases;

[0033] (4) Evaporation and crystallization: After the potassium acetate in the cooling water of the cooling tower reaches 20g / L, the obtained cooling water is evaporate...

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Abstract

The invention discloses a method for utilizing low-concentration acetic acid wastewater, which comprises the following steps: (1) filtration treatment: filtering acetic acid wastewater for impurity removal; (2) neutralizing treatment: adding potassium hydroxide into the filtered acetic acid wastewater to initiate neutralization reaction, and stirring with a stirrer to thoroughly mixing the acetic acid wastewater and potassium hydroxide so that the acetic acid and potassium hydroxide react to generate potassium acetate, thereby regulating the pH value of the acetic acid wastewater to 7-9; (3) concentration treatment: introducing the neutralized acetic acid wastewater into a water cooling tower to replenish water to the water cooling tower, wherein the concentration of potassium acetate in the cooling water in the water cooling tower increases as the water cooling tower system operates; and (4) crystallization by evaporation: when the concentration of potassium acetate in the cooling water in the water cooling tower reaches 20-2700 g / L, evaporating the cooling water to crystallize to obtain the potassium acetate. The method can treat acetic acid in the acetic acid wastewater so as to recycle the potassium acetate, and has the advantages of strong practicality and high operational safety and stability.

Description

technical field [0001] The invention relates to the technical field of wastewater treatment, in particular to a method for utilizing low-concentration acetic acid wastewater. Background technique [0002] With the increasing emphasis on environmental protection in various countries, in view of the harm caused by industrial wastewater to the environment, employees and other people's bodies, domestic and foreign industrial wastewater discharge standards have been formulated and become increasingly stringent. It is understood that a large amount of low-concentration acetic acid wastewater is directly discharged every year, which not only loses a large amount of resources, but also pollutes the environment. Therefore, recycling low-concentration acetic acid wastewater not only has good economic benefits, but also is necessary for environmental protection. [0003] At present, the treatment methods for acetic acid wastewater include: neutralization method, adsorption method, syn...

Claims

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Application Information

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IPC IPC(8): C02F9/10C02F101/34
Inventor 杨旭东
Owner 武汉旭日华环保科技股份有限公司
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