Phenolic resin wastewater processing method and special-purposed device

Abstract

The invention discloses a phenolic resin wastewater processing method and a special-purposed device. The phenolic resin wastewater processing method comprises the following steps: phenolic resin wastewater is mixed with Ca(OH)2, and a pH value is regulated to 10-12; a coagulation and sedimentation reaction is carried out; a pH value is regulated to 3-5; a Fenton reaction is carried out; a pH value is regulated to 7-10, and solid-liquid separation is carried out; a hydrolytic acidification-anaerobic fermentation process is carried out; a contact oxidation reaction is carried out; and secondary sedimentation is carried out. The special purposed device comprises the sequentially connected components of: a wastewater feeding tank, a coagulation and sedimentation reaction rank with a first feeder, a Fenton reaction device with a second feeder, a solid-liquid separation device with a third feeder, a hydrolytic acidification tank, an anaerobic fermentation tank, a contact oxidation reaction rank with an aeration device, and a secondary sedimentation tank. With the processing method, pollutant content in the processed wastewater reaches a discharge standard. The operation is simple, control conditions are less, and cost is low.

Description

technical field [0001] The invention relates to a method and special equipment for treating phenolic resin wastewater. Background technique [0002] Phenolic resin (phenolic resin, PF), solid phenolic resin is yellow or transparent, generally amorphous blocky substance, reddish due to free phenol, specific gravity 1.25-1.30, easily soluble in alcohol, insoluble in water, Stable to water, weak acid and weak base solution. Phenolic resin is a resin made by polycondensation of phenol and formaldehyde under catalyst conditions, neutralization and washing with water. Phenolic resin has good acid resistance, mechanical properties and heat resistance, and is widely used in anti-corrosion engineering, adhesives, flame retardant materials, grinding wheel manufacturing and other industries. However, the wastewater generated during the phenolic resin manufacturing process, due to the presence of COD Cr The characteristics of high concentration, difficult biodegradation, and relative...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to overcome the instability of the phenolic resin wastewater treatment method in the prior art, high cost, and easy secondary pollution, or the direct biological method has very high requirements for bacteria, the water output is unstable, and cannot The defect of direct discharge provides a phenolic resin wastewater treatment method and special equipment that fully meet the discharge standard, easy to operate, less control conditions and low operating cost.

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