In order to solve the problem of corrosion of equipment and pipelines in methanol recovery system caused by acid substances enriched in extraction water of methanol recovery system in a 50×104 t/a gasoline etherification unit of a petrochemical company.Through technical transformation,an extraction water purifier is added to the bottom pipeline of the methanol extraction tower,the extraction water purifier is filled with deacidification agent to neutralize the acidic substances in the extraction water,so as to reduce the acidity of the extraction water,realize the deacidification of the extraction water and reduce the corrosion of equipment and pipeline.After the deacidification technical transformation of extraction water in methanol recovery system of light gasoline etherification unit was completed and put into use,the pH of extraction water was increased more than 6.5 due to the neutralization of acidic substances in extraction water by deacidification agent,which played a positive role in reducing the corrosion of equipment and pipelines in methanol recovery system and realize long-term,safe and stable operation of the unit.
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