Yangzi Petrochemical’s Aromatics Plant completed the renovation of the EBO tank ahead of schedule and put it into use
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The aromatics plant of Yangzi Petrochemical completed the renovation of the EBO tank ahead of schedule and put it into use. On May 10, the renovated EBO (ethylene tar) storage tank was officially put into operation, supplying fuel to the heaters in the xylene complex. EBO (ethylene tar) is a product with low added value; it can replace liquefied gas and natural gas, which have high added value, as fuel for heating furnaces. It represents an important measure for Yangzi Petrochemical Company to reduce energy consumption and emissions as well as to cut costs and increase efficiency. By upgrading its existing storage tanks, the Aromatics Plant of Yangzi Petrochemical successfully accepted the EBO from the Olefins Plant, thereby creating the conditions for the implementation of the \"100-Day Effort to Achieve Results\" initiative. Due to the special properties of EBO materials, which are stored in atmospheric-pressure tanks, high requirements are placed on safety and environmental protection. Therefore, Yangzi Petrochemical Company has included this tank renovation in the VOCs (volatile organic compounds) renovation project. The Aromatics Plant of Yangzi Petrochemical applied to the company in advance to have the storage tanks separated. Yangzi Petrochemical requested that the Aromatics Plant complete the renovation of the EBO tanks as quickly as possible, so as to contribute to achieving the goals set for the 100-day campaign.
Since this was the first time that the modified FB-2101C tank had been taken out of service, and there were no available process treatment data or experience, the Aromatics Plant of Yangzi Petrochemical pooled its efforts and adopted a method of using circulating flushing oil for displacement along with transferring the residue at the bottom of the tank to underground tanks, thereby solving the problem of dealing with the residual liquid at the tank bottom. The disposal of cooking wastewater from storage tanks is another challenge; as special wastewater, it must be processed according to procedures over a period of at least 3 days before it can be discharged ； The aromatics plant of Yangzi Petrochemical obtained an additional 2 days by using the method of storing in barrels first before disposal. Before the construction began, the Aromatics Plant of Yangzi Petrochemical requested the contractor to optimize the workflow and proactively improve efficiency at each stage, starting from things such as filling out forms and optimizing the locations for approvals, as well as reducing the time required to process electrical invoices. During the construction period, various teams arrived early to fill out forms and approvals, while supervisors got involved in advance to implement protective measures; they worked overtime continuously, both during the day and at night ； Unit leaders and project supervisors were on site continuously to oversee the work, and some shift workers gave up their marriage leave to ensure there was sufficient supervision, thus guaranteeing the orderly progress of the construction.