Anqing Petrochemical Development Equipment Leak Detection and Repair Technology

"Propylene regulating valve, nominal diameter 150 mm." On July 22, during the refining process of part of the I gas field, the Qingping project team, together with staff from Beijing Yutai Tiancheng Technology Co., Ltd., was on-site adjusting the valve. They collected and prepared sealing points from equipment such as pumps and compressors for the development and application of a new LDAR technology—Leak Detection and Repair system. To meet the requirements of the national "Twelfth Five-Year Plan" on pollutant emission reduction, Anqing Petrochemical Co., Ltd. has intensified its efforts to reduce emissions and pollution. Recently, a refining coking unit, a gas separation unit, and areas containing liquefied gas, propane, and propylene tanks were designated as the first batch of pilot facilities. In collaboration with Beijing Yutai Tiancheng Technology Co., Ltd., they developed new leak detection and repair technologies aimed at improving energy efficiency, reducing emissions, and enhancing safety and environmental protection. When volatile organic compounds like light oil, liquefied gas, propane, and propylene leak, they are often invisible to the naked eye and undetectable by smell. This makes it difficult to identify leaks in time, which not only affects the working environment but also leads to resource loss. Additionally, these substances are flammable and explosive, posing significant safety risks. The new LDAR technology effectively addresses this challenge. The LDAR system uses internationally advanced leak detection and repair management software to seal selected equipment and create a computerized database, building detailed records within the system. On-site, detection point indicators and description cards are set up, enabling standardized management of equipment leakage. Technicians regularly use portable detectors to inspect sealing points across the site. High-sensitivity detectors can detect even small leaks, and the location and amount of leakage are entered into the LDAR system, allowing for real-time monitoring and data-based management. Through the LDAR technology, the process includes leak detection, repair, re-testing, and data evaluation, forming a closed-loop management system. The operations department classifies sealing points that exceed acceptable leakage levels and implements targeted solutions to manage them effectively. Currently, the refinery has completed the statistics of nearly 20,000 sealing points across three coking units, and the I gas separation unit is intensifying the collection of about 5,000 sealing points. According to the manufacturer's technical personnel, after completing the initial phase of on-site sealing point statistics, the development and application of new technologies such as system documentation and on-site inspections will proceed in an orderly manner. “Once the new leak detection and repair technology is implemented, equipment leakage will be significantly reduced, providing better protection for safe production,” said the department head, who is very optimistic about the potential of this innovative approach. (SHU Jingqun)

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