As one of the four key systems in the petroleum refining industry, the cold coke effluent system in China's coking plants has long relied on open-type in-line technology. For many years, achieving a closed-loop and full-cycle utilization of cold coke effluents remained an unresolved challenge. However, with the growing volume of heavy sulfur crude oil being refined, the pollution caused by cold coke wastewater has become a persistent and serious issue in the industry. This problem was finally addressed through the "Closed Separation Technology for Petroleum Coking Wastewater" project, which won the Second Prize of the National Science and Technology Progress Award in 2007.
According to Professor Wang Hualin, the project leader from East China University of Science and Technology, in 2000, Sinopec Engineering Construction Company launched the first large-scale modern coking unit in China as part of the Shanghai Petrochemical 1 million-ton/year coking project. The process and key technologies were imported from abroad, but since its commissioning in February 2000, it continuously faced environmental issues due to oil contamination and the presence of volatile toxic substances in the cold coke effluent. This led to significant public concerns among nearby residents.
In response, Sinopec Group and the Shanghai Science and Technology Commission initiated urgent research projects. After accepting the task, the research team worked tirelessly for years, overcoming numerous technical challenges. They developed a fully enclosed, low-energy swirl decoking technology, along with advanced sub-micron oil droplet separation techniques that effectively handle the complex characteristics of cold coke wastewater, such as rapid parameter changes, oil-water-coke emulsification, and the mixing of wastewater and exhaust gases. Additional innovations included rapid swirl oil dehydration (desalination and alkalinization) technology, coupled treatment of wastewater and waste gas, and a closed-loop separation and reuse system for full-cycle cold coke wastewater. These efforts culminated in a complete set of advanced technologies for efficient wastewater separation and management.
Since January 2004, the 1 million-ton/year coking plant at Shanghai Petrochemical successfully implemented this innovative system. It has operated smoothly, with stable performance, ease of operation, and strong controllability, meeting both industrial production and environmental protection requirements. Monitoring data showed that the system significantly outperformed the previous open system in terms of resource recovery and environmental coordination, reaching international standards in technical and economic performance.
This joint project between East China University of Science and Technology and Zhenhai Refinery Branch of China Petroleum & Chemical Corporation has secured 10 intellectual property rights. The technology was incorporated into the Chinese environmental protection standard HJ/T125-2002. To date, it has been successfully applied in 31 domestic units and one overseas location, capturing 80% of the domestic coking market. In the first three years, it generated RMB 367.9 million in direct economic benefits, saved 1,727,520 tons of fresh water, reduced odor emissions by approximately 26,500 tons, and cut wastewater discharges by about 1,727,250 tons, delivering remarkable economic and social returns.
Insulated Pallet Covers,Waterproof Aluminum Foil Pallet Cover,Aluminum Foil Insulation Bags Pallet Cover,Aluminum Foil Temperature Insulated Cover
Huizhou Green Foil Insulation Co., Ltd , https://www.hzthermalbags.com