In-situ reagents injection system and method

US11633768B2 · kind B2 · utility

Assignee

• CHINESE RESEARCH ACADEMY OF ENVIRONMENTAL SCIENCES · CN

Inventors

• Yonghai Jiang · Beijing, CN
• Beidou Xi · Beijing, CN
• Yu Yang · Beijing, CN
• Xinying Lian · Beijing, CN
• Xiangjian Xu · Changzhou City, CN
• Yongfeng Jia · 东风镇, CN
• Fu Xia · Beijing, CN
• Xu Han · Beijing, CN

Key dates

• Filing date: Apr 3, 2020
• Grant date: Apr 25, 2023
• Expiry date: Feb 19, 2041

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B09C2101/00
• WIPO field: Environmental technology
• WIPO sector: Chemistry

Abstract

An in-situ reagents injection system comprises a compressed air storage tank, a remediation reagents storage tank, an injection adjusting valve, an injection pipe, an upper sealing device and a lower sealing device. When the reagents injection is carried out, the compressed air is injected before the remediation reagents is injected, the porosity of the aquifer medium is increased by utilizing the air pressure expansion technology to form a relatively uniform dominant channel, and the remediation reagents is injected to realize uniform and efficient conveying of the reagents. The in-situ reagents injection system and method can make the homogeneous and efficient conveying of the remediation reagents, and ensure the full utilization of the remediation reagents, with low energy consumption of injection equipment, simple process, and flexible operation. The injection is performed in sections from top to bottom according to the steps to improve the in-situ reagents injection efficiency and remediation efficiency.