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Shaanxi Jingyi Chemical’s hydrogen production purification unit completed the technical upgrade project for the boiler feed water pump. Author/Source: Shaanxi Jingyi Chemical Co., Ltd. Date: 2021-08-23. Clicks: 32. On August 19, the purification unit at Shaanxi Jingyi Chemical’s hydrogen production facility successfully completed the technical upgrade of the boiler feed water pump. The purification unit is equipped with 6 high-, medium-, and low-pressure boiler feed water pumps. These pumps supply high-, medium-, and low-pressure boiler water, as well as cold and hot seal water, to the hydrogen production gasification, synthesis, and conversion units, various oil processing units, and the sulfur recovery system; they play a vital role in ensuring the proper operation of these systems. However, during the initial operation phase, after numerous investigations and analyses conducted by the center and the plant management, it was found that the outlet and return pipelines of the high-, medium-, and low-pressure boiler pumps did not have manual shut-off valves, which posed a risk to production. In the event of a failure in one of the pumps, the backup pump could not be effectively isolated, preventing maintenance personnel from carrying out repairs, and this would severely affect the stable operation of other equipment. Therefore, it is essential to install manual shut-off valves on the outlet and return pipelines of all pumps. Taking advantage of this opportunity for equipment maintenance and troubleshooting, the center has decided to carry out technical upgrades. After thorough preparation, the process engineers and maintenance staff spent 5 days installing 12 manual isolation valves on the outlet and return pipelines of the 6 boiler feed pumps. The completion of this technical improvement project lays a more solid safety foundation for the subsequent ‘safe, stable, long-lasting, environmentally friendly, efficient, and high-quality’ operation of the equipment.