In the production process of phenolic resin, phenol needs to be added for batching, and water vapor needs to be used to pass through the phenolic resin to remove excess phenol and purify the product in the later stage, which results in a large amount of phenol-containing wastewater being discharged. Phenolic resin wastewater is mainly an aqueous solution of phenol. The overall calorific value of the wastewater is low, and it is difficult to treat it by incineration, and the treatment of hazardous waste is difficult. After studying this type of wastewater, it can found that solvent extraction is effective for treating high-concentration phenol-containing wastewater.
Extraction of Phenol from Phenolic Resin Wastewater
The solvent extraction method is adopted, and the CWL-M centrifugal extractor is used in combination. The appropriate extractant is selected, the pH value of the raw material liquid is adjusted, and the two-phase solution enters the mixing zone formed between the drum and the shell in a certain proportion. With the help of the rotation of the drum, the two phases are quickly mixed and dispersed through the turbine disk and impeller, and the two-phase solution is fully transferred to complete the mixing and mass transfer process.
The mixed liquid enters the drum under the action of the vortex disk. Under the action of centrifugal force, after separation, the two-phase solution enters the collection chamber through their respective weir plates and is led out of the machine through the guide pipes, completing the two-phase separation process.
Different extraction environments will affect the extraction effect during the extraction process. The use of a reasonable liquid system and correct extraction equipment can successfully recover phenol from high-concentration phenol-containing wastewater produced by phenolic resin production, realize the resource recovery of phenols, effectively reduce the phenol content in wastewater, and reduce the pressure of subsequent treatment.
Extraction Equipment CWL-M Centrifugal Extractor
The centrifugal extractor is the best choice for phenol-containing wastewater treatment. Centrifugal extractor is widely used in chemical organic wastewater, which can effectively extract organic matter from wastewater and achieve wastewater pretreatment. The centrifugal extractor is very effective in extracting phenol from phenolic resin wastewater. The CWL-M series centrifugal extractor has high extraction efficiency and good extraction effect. Zhengzhou Tiei Extraction is committed to the research and development and production of liquid-liquid extraction and separation equipment. There are many types of equipment, including small extraction equipment for laboratories and industrial centrifugal extractor.
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