As one of the four major equipments in the petroleum refining industry, the cold coke effluent system of the coking plant in China has been using open-type in-line technology for decades. The closed and full-cycle utilization of cold coke effluents has not been resolved for a long time. In recent years, with the increase in the volume of imported heavy sulfur heavy oil refining, the pollution of the cold coke effluent from the petroleum coking plant has become an increasingly “durable disease†in a headache industry. The “Cool Diseases†was conquered by the technology and application project for the closed separation of petroleum coking wastewater that won the second prize for the National Science and Technology Progress Award in 2007.
According to the project leader Professor Wang Hualin from East China University of Science and Technology, in 2000, Sinopec Engineering Construction Company relied on Shanghai Petrochemical 1 million-ton/year petroleum coking project to build the first large-scale modern petroleum coking unit in China. This set of process and key technologies are both Since the project was introduced from abroad, it has been polluted by the oil and volatile toxic and hazardous substances contained in the cold coke effluent since it was put into operation in February 2000. As a result, the residents around the device have expressed great opinions.
To this end, the Sinopec Group and the Shanghai Science and Technology Commission urgently set up research projects. After the project team accepted the task, after years of hard work, it finally solved one difficulty after another. The technicians have developed a fully-enclosed, low-energy swirl decoking technology and a high-precision sub-micron oil droplet multi-field synergistic cyclone detaching for the characteristics of rapid changes in cold coke wastewater parameters, emulsification of oil-water-coke, and interleaving of wastewater and exhaust gas. Oil technology, rapid swirl oil dehydration (desalination, alkalinization) technology, wastewater and waste gas coupling treatment technology, closed-cycle separation and utilization technology of full-cycle cold-coke wastewater, and micro-small swirl core tube and large-scale cyclone with controllable flow field structure Finally, a complete petroleum coking sewage sewage separation and separation complete set of technology was formed.
Using this innovative technology, the Shanghai Petroleum & Chemical Co., Ltd. 1 million-ton/year coke plant cold coke effluent closed separation and utilization system has been operating smoothly since January 2004. It is stable in operation, easy to operate, and easy to control, meeting industrial production and environment. Coordination requirements. Through the monitoring of the operating status of major equipment, the system is significantly superior to the original open system process in terms of resource recovery and environmental coordination, and has reached the international advanced level in terms of technical and economic indicators.
The project, jointly completed by East China University of Science and Technology and China Petroleum & Chemical Corporation Zhenhai Refinery Branch, has applied for 10 intellectual property rights. The complete set of technologies was adopted by the Chinese environmental protection industry standard HJ/T125-2002. At present, the achievements have achieved 31 successful applications in China and 1 overseas, and the domestic petroleum coking unit market share has reached 80%. In the first three years, accumulated direct economic benefits have been RMB 367.9 million, fresh water resources have been saved 1,727,520 tons, odor body emissions have been reduced by approximately 26,500 tons, and wastewater discharges have been reduced by approximately 1,727,250 tons, achieving remarkable results. Economic and social benefits.