the utilization rate of amino resin paint is so high, how to solve the environmental protection problem of sewage?

amino acid resin paint as an industrial paint, in many industrial materials, construction is used. The problem of sewage treatment in the production of amino resin paint produced in its production process is a headache. Because the concentration of amino resin paint production sewage is very high, it is difficult to do this kind of industrial sewage treatment.

amino acid resin paint sewage contains a considerable part of methanol, butanol and a small amount of formaldehyde, in the amino acid resin paint sewage treatment needs to consider as much as possible the effective resources in the sewage recycling.

Based on the current situation of sewage treatment of amino resin paint production, in order to achieve the purpose of recycling useful substances, reducing pollution, protecting the environment and increasing benefits for enterprises, the following treatment ideas are proposed.

, since the wastewater from the production of amino resin paint contains a considerable amount of methanol and butanol, they are separated from water by distillation, and the methanol and butanol are recovered from the wastewater and refined to reach the reuse concentration of the produced resin. In the butanol-methanol-water ternary system (formaldehyde can be ignored), the butanol and water system has a very low azeotropic point and is partially miscible, so it is necessary to adopt azeotropic distillation and set up an oil-water separator in the process. The presence of the third component methanol changes the miscible system of butanol and water, reduces the concentration of butanol in the oil phase and increases the loss of butanol in the water phase. When the methanol concentration reaches a certain concentration, the oil-water stratification phenomenon will disappear, and 75%-80% of butanol products cannot be recovered. At the same time, the boiling point of butanol is 118 ℃, the boiling point of methanol is only 65 ℃, but the relative volatility of butanol is larger than that of methanol. In rectification, the methanol component is distilled off first, but it can only be distilled off afterwards, with the butanol fraction sandwiched in. Therefore, two pure components cannot be obtained by one rectification. In view of this situation, we intend to use batch two-stage distillation method.

Through the above amino resin paint production sewage treatment process can recover most of the useful substances in the sewage, which not only reduces the pollution, but also increases the efficiency of the enterprise.