Dalian Ligong Safety Equipment Co.,Ltd
As of March 20, the ethylene oxide refining tower of Zhenhai Refinery ethylene oxide/ethylene glycol (EO/EG) plant has completed its expansion and transformation operations for four years, and this cycle has cumulatively produced 610,000 ethylene oxide. Yu Teng, after the transformation, increased sales profit by 280 million yuan.
The Zhenhai Refinery EO/EG plant is the company's 1 million-ton/year ethylene downstream supporting facility. It uses DOW's METEOR process technology patent to design and produce ethylene glycol 650,000 tons/year. The plant was put into production in April 2010 and successfully completed. In June 2014, the company completed the first comprehensive shut-down of the changeover agent and synchronized the expansion and reconstruction of the ethylene oxide refining tower. By March 2018, the installation had been safely operated for more than 8 years. In order to achieve the goal of “long-term cycle and efficiency”, Zhenhai Refining & Chemical continued to carry out optimization of catalyst performance and operational adjustments. It has overcome the instability of catalyst performance, rapid decline in selectivity, frequent pumping of accelerator pumps, and decarbonization of decarbonation units. Poor results, problems such as ethylene glycol recycling feed elbow flushing and tubular reactor clogging, etc. High-load smooth operation of the “stumbling block” was broken one by one.
The operating data shows that the flexibility of the device after the transformation is significantly improved. Zhenhai Refining and Chemicals keeps a close eye on the market, measures the effectiveness of EOEG devices under different operating conditions, adjusts the product structure flexibly, and strives to maximize the benefits of EO/EG devices. After capacity expansion and replacement of catalysts, both unit gross profit and product output have increased significantly. As of March 20, this cycle has cumulatively produced more than 61 million tons of ethylene oxide, and the output ratio has risen from 16% to 22%. In the past eight years, Zhenhai Refining & Chemical's EO/EG plant has realized a cumulative profit of more than 5 billion yuan, more than double the investment (2.23 billion). Rupture discs produced by our company are also widely used in refineries.
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