Method for treating an oily solid waste sludge

US11629084B2 · kind B2 · utility

Assignee

• CHINA UNIVERSITY OF PETROLEUM BLUE SKY(QINGDAO) PETROLEUM TECHNOLOGY CO., LTD · CN

Inventors

• Weizhong Wei · Qingdao, CN
• Zhe Bai · Qingdao, CN
• Xinran Li · Qingdao, CN
• Haotian Gong · Qingdao, CN
• Rongguang Wu · Qingdao, CN
• Chuansheng Jia · Beijing, CN
• Biao Yang · Beijing, CN
• Deliang Liu · Nanjing, CN
• Zhenhua Sun · Suzhou, CN

Key dates

• Filing date: Jun 11, 2021
• Grant date: Apr 18, 2023
• Expiry date: Jul 9, 2041

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C02F2103/365
• WIPO field: Environmental technology
• WIPO sector: Chemistry

Abstract

The present disclosure provides a solid waste treatment method, including following steps: screening off masses having a particle size greater than 0.5 cm from solid waste; adding extraction agents to the solid waste and then heating and stirring so that the solid waste is fully dispersed in the extraction agents; placing the mixed extraction agent in a centrifuge and centrifuging the mixed extraction feeding liquid phase separated by centrifuging into a rectification tower for rectification and cooling, recovering residual oil substances in a rectification kettle, separating mixture of cooled extraction agents and water, continuously adding the separated extraction agents into an extraction kettle for cyclic extraction, and conveying sewage to a sewage treatment plant to treat and discharging the sewage after the sewage reaches a treatment standard.