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
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[0019] Example 1: It includes the following steps:
[0020] (1) Filtration treatment: first filter and remove impurities from the acetic acid wastewater;
[0021] (2) Neutralization treatment: Add potassium hydroxide to the filtered acetic acid wastewater to generate neutralization reaction, use a mixer to stir the acetic acid wastewater and potassium hydroxide to fully mix, acetic acid and potassium hydroxide react to generate potassium acetate, and adjust the acetic acid wastewater. PH to 8;
[0022] (3) Concentration treatment: the acetic acid waste water obtained after neutralization is led to the cooling water tower to replenish water, and the concentration of potassium acetate in the cooling water of the cooling tower increases with the operation of the cooling water tower system;
[0023] (4) Evaporative crystallization: After the potassium acetate in the cooling water of the cooling tower reaches 50 g / L, the obtained cooling water is subjected to evaporative crystalli...
Example Embodiment
[0024] Example 2: It includes the following steps:
[0025] (1) Filtration treatment: first filter and remove impurities from the acetic acid wastewater;
[0026] (2) Neutralization treatment: Add potassium hydroxide to the filtered acetic acid wastewater to generate neutralization reaction, use a mixer to stir the acetic acid wastewater and potassium hydroxide to fully mix, acetic acid and potassium hydroxide react to generate potassium acetate, and adjust the acetic acid wastewater. PH to 7;
[0027] (3) Concentration treatment: the acetic acid waste water obtained after neutralization is led to the cooling water tower to replenish water, and the concentration of potassium acetate in the cooling water of the cooling tower increases with the operation of the cooling water tower system;
[0028] (4) Evaporative crystallization: After the potassium acetate in the cooling water of the cooling tower reaches 2700g / L, the obtained cooling water is subjected to evaporative crystall...
Example Embodiment
[0029] Example 3: It includes the following steps:
[0030] (1) Filtration treatment: first filter and remove impurities from the acetic acid wastewater;
[0031] (2) Neutralization treatment: Add potassium hydroxide to the filtered acetic acid wastewater to generate neutralization reaction, use a mixer to stir the acetic acid wastewater and potassium hydroxide to fully mix, acetic acid and potassium hydroxide react to generate potassium acetate, and adjust the acetic acid wastewater. PH to 9;
[0032] (3) Concentration treatment: the acetic acid waste water obtained after neutralization is led to the cooling water tower to replenish water, and the concentration of potassium acetate in the cooling water of the cooling tower increases with the operation of the cooling water tower system;
[0033] (4) Evaporative crystallization: After the potassium acetate in the cooling water of the cooling tower reaches 20 g / L, the obtained cooling water is subjected to evaporative crystalli...
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