Maintenance of the gasification unit at Shaanxi Jingyi Chemical Industry

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Maintenance of Gasification Units at Shaanxi Jingyi Chemical Co., Ltd. Author/Source: Shaanxi Jingyi Chemical Co., Ltd. Date: 2021-06-04 Clicks: 10 Recently, the storage and transportation center as well as the hydrogen production center of Shaanxi Jingyi Chemical Co., Ltd. organized maintenance work on the phenol-ammonia recovery unit and the gasification units, thereby eliminating existing hazards and ensuring the steady, safe, and optimal operation of these units. During the operational phase of the phenol-amine recovery unit in the storage and transportation center, it was found that a large amount of debris had accumulated on the heat exchangers, reducing their heat exchange efficiency and thereby affecting the system’s performance parameters and normal operation. Since the phenol-amine recovery unit serves as the \"wastewater treatment system\" for the entire plant and plays a crucial role in the stable operation of other units, the management attaches great importance to it. After careful discussion and thorough planning, a process plan for cleaning the heat exchangers, as well as a cleaning strategy, were developed. Once the plan was finalized, the teams responsible for phenol and ammonia recovery stepped up to the challenge and took on the maintenance tasks voluntarily. During the heat exchanger cleaning process, all personnel participated and worked together in good cooperation, strictly adhering to the principles of \"zero emissions and zero pollution.\" Proper containment measures were implemented, and each clogged heat exchanger was thoroughly cleaned, ensuring that the cleaning work was carried out carefully and meticulously. After several days of continuous work, the cleaning of the heat exchanger tube bundle and its reinstallation for operation were successfully completed. Burner B of the gasifier in the hydrogen production center operated continuously for 93 days, marking the longest continuous operating time for a gasifier burner since the plant’s initial commissioning. After thorough discussion and evaluation, the center decided to shut down the furnace to replace the burners, and simultaneously carry out maintenance on the slurry feed pump. After the objectives were determined, the center developed a thorough maintenance plan and arranged the workload among the staff appropriately. After the gasification furnace was shut down as planned, the process engineers at the center worked closely with the equipment maintenance staff at the maintenance center to carry out the maintenance of the slurry feed pump and the replacement of the burners in an orderly manner. Thanks to the joint efforts of everyone, the maintenance work was completed two hours ahead of schedule. With the successful one-time startup of Gasification Unit B, it marks the successful completion of this maintenance work.