A kind of wastewater treatment process in cyanate resin production

Abstract

The invention discloses a waste water treatment process in the production of cyanate ester resin, which enables the waste water to be filtered to remove solid phase impurities, and then the waste water is introduced into a waste water treatment device for treatment, and the waste water treatment device includes a water storage tank and a primary treatment device , intake air mixing device and secondary treatment device, in which the water storage tank is used for water storage, pH adjustment and part of COD and salt removal, the primary treatment device is used to reduce the COD in the wastewater to the preset standard, and can also The low cyanide concentration in the wastewater, the secondary treatment device is used to reduce the cyanide concentration in the wastewater, and eliminate the secondary pollution caused by the process of reducing the cyanide concentration, so that the wastewater can meet the discharge standard and improve the safety of the discharged wastewater.

Description

technical field [0001] The invention belongs to the technical field of industrial wastewater treatment, and in particular relates to a wastewater treatment process in the production of cyanate resin. Background technique [0002] The wastewater produced in the production of cyanate resin contains both trace cyanide radicals and high salt content and high COD. It belongs to industrial wastewater that is difficult to treat. Generally speaking, for industrial wastewater, the content of inorganic salts exceeds 1% (without the conductivity method measure the salt content, but use the incineration method to measure the salt content) will have an impact on biochemistry, and the degree of influence is related to the composition of organic matter in the wastewater; if it exceeds 1.5%, the efficiency of biochemical treatment will be greatly reduced; if it exceeds 2% (B / C (Except for water with a very high value), because the osmotic pressure cannot be balanced, and the waste water als...

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Problems solved by technology

[0002] The wastewater produced in the production of cyanate resin contains both trace cyanide radicals and high salt content and high COD. It belongs to industrial wastewater that is difficult to treat. Generally speaking, for industrial wastewater, the content of inorganic salts exceeds 1% (without the conductivity method measure the salt content, but use the incineration method to measure the salt content) will have an impact on biochemistry, and the degree of influence is related to the composition of organic matter in the wastewater; if it exceeds 1.5%, the efficiency of biochemical treatment will be greatly reduced; if it exceeds 2% (B / C (Except for water with a very high value), because the osmotic pressure cannot be balanced, and the waste water also contains traces of biological toxicity cyanide, it is difficult to degrade biochemically;

[0003] In the production process of cyanate ester resin, the discharged wastewater is high-salt and high-COD wastewater. When treating this wastewater in the prior art, on the one hand, it only deals with single pollutants, and it is impossible to treat the wastewater at one time. treatment, the treatment efficiency is low. On the other hand, secondary pollution is likely to occur during the treatment of waste water, resulting in the discharge of waste water that is still harmful to the environment. In addition, in the actual waste water treatment process, a large amount of treatment substances will be consumed , In the prior art, the treatment substances are not fully utilized during treatment, resulting in a large amount of treatment substances being discharged with the treated wastewater, causing environmental pollution and waste of raw materials. In order to solve the above problems, the present invention provides the following technical solutions

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