On December 29th, Guangdong Petrochemical's 1.2 million tons/year ethylene unit achieved a breakthrough with its annual output successfully surpassing the 1.4 million-ton mark, setting a new record for domestically produced ethylene units and highlighting the high level of production management and operation in China’s large petrochemical equipment. The high yield is backed by a comprehensive collaborative support system. Since the beginning of this year, Guangdong Petrochemical has focused on efficient operation throughout the process, establishing multidimensional collaborative mechanisms: through establishing a "daily communication, weekly coordination, monthly review" routine collaboration with upstream and downstream units, achieving seamless linkage from raw material supply to product output; innovatively implementing an assessment mechanism for contracting units that deepens an integrated response mode with maintenance teams, forming a production guarantee synergy that is both vertically integrated and highly effective, laying a solid foundation for the long-term stable operation of the unit. Technological innovation and problem-solving are key engines for capacity increase. The company precisely focuses on production bottlenecks, building an innovation and improvement platform covering all professional fields such as process, equipment, and instrumentation, extensively gathering employee wisdom, and successfully promoting several key technological renovation projects including the reform of the methane rich gas recovery system and the optimization of the ethylene volatile gas filter system, continuously unlocking the production potential of the unit. As a core piece of equipment, the cracked gas compressor installed in the unit is the largest steam cracking device using domestically produced centrifugal compressors, while the eight cracked furnaces are the main energy-consuming units, their operational efficiency directly determining the overall energy efficiency of the unit. To tackle the problems of energy efficiency and maintenance under high load operation, the technical team made precise measures: by finely regulating the oxygen content in the heating furnace, stabilizing it within an ideal range of 1.5% - 2%, effectively reducing fuel consumption; for the accumulation of ash in the flow section of the cracked furnace, adopting chemical cleaning technology, keeping the heat efficiency of the heating furnace at over 94%, achieving significant energy savings annually. Additionally, by precisely optimizing the whole process parameters, this year the number of times the cracked furnace needs de-tarring was reduced by five compared to the same period last year, not only significantly reducing maintenance costs but also realizing green low-carbon development goals, providing referential practical experiences for the efficient and low-carbon operation of large-scale ethylene units.
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