In June, Jilin Petrochemical blew the assembly number for a four-year major repair. With the continuous shutdown and maintenance of 122 sets of main and auxiliary devices, the environmental protection work during the parking replacement process has become an important part of the company's “green maintenanceâ€. According to Zhang Chunyu, assistant to the general manager of the Jilin Petrochemical Company and director of the Division of Safety, Environment and Energy Conservation, “The time from the installation of the equipment to the time of delivery and maintenance, the number of material replacement operations, and the amount of waste and exhaust gas generated during the overhaul are the weakest links for environmental accidents. For this purpose, we have made stringent abatement measures in advance, and the company's main leaders have conducted in-depth supervision at various inspection sites to ensure that all the water discharged into the Songhua River reaches the standard." On June 3, the reporter saw at the scene of the phenol-acetone plant parking and replacement. The operator was carrying out a return operation, and the sound of the on-site gas purge line was deafening. The factory safety and environmental protection department chief Fu Jianghai told reporters: “In order to ensure that the equipment and the materials in the pipeline are completely dried, we divide the responsibilities of each process and post and establish a responsibility investigation system. We carry out the steps for cleaning replacement creatively. The implementation of the listing system shall implement three-level confirmation of the effects of cleaning and replacement, so as to ensure that all aspects of the return of materials are seamlessly connected and no dead ends are left." In the treatment of parking waste, each parking device follows a principle at the same time: Resolutely put an end to the straight line, ensure that the gas is not in the sky, and it does not fall to the ground. The employees of the ethylene oxide plant brainstormed their ideas and used their own hoses, pipelines, valves and other items to make their own recycling equipment. Through the connection with the purge exhaust port, the residual waste in the pipeline was “obtrusively†entered into the waste bucket. This approach has been widely used in Jilin Petrochemical's parking facilities. Only the ethylene oxide plant recovered more than 2,000 kilograms of waste during the period of parking. The acrylonitrile plant shop personnel also carried out three times of sewage suction trucks to remove waste water from more than 100 sewage wells, floor drains, and trenches on the site and in the surrounding area, and cleared the accumulated pollutants. They adopted the method of sealing all the well covers with oil-impregnated felt cloth, then blocking the seams with cement, and finally filling the surface of the manhole cover to eliminate the hidden dangers of contaminants flowing into the wells during parking. The earliest and last stop of environmental protection facilities is also an important means for the company to achieve green maintenance. "During the stop period, each production plant opened the plant's water storage system, paid close attention to the amount of sewage produced, monitored the 24-hour real-time monitoring of the water storage system, and notified monitoring information at any time to ensure that the sewage did not leave the factory," said Zhang Chunyu. Jilin Petrochemical strengthened its waste management and established warning lines and warning signs at storage sites. It is forbidden for outside construction personnel to enter at random. The management of inspection and repair operations in these areas was upgraded, and the inspection and handover system was strictly implemented in the process operations to prevent leakage. Waste materials such as waste catalysts generated during the maintenance process are also major hazard sources and important environmental pollution factors. Jilin Petrochemical carries out classifications such as incineration, solidification and landfilling according to the procedures of receiving, storing, and disposing, grasps important links and key points, formulates a sound management system, and implements step-by-step confirmation. During the process of dumping the waste, the company's designated professionals perform full-scale supervision and supervise the operation personnel to carry out divisional burial of the waste according to its nature, so as to ensure that the buried material is available upon arrival. "Through all the staff, we are now coordinating and managing all the major production facilities that have been delivered and overhauled. There has been no environmental pollution incident and we have achieved a green maintenance goal," said Zhang Chunyu.
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