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Zhonghe Gasification: Phase II of the Shanxi Jinxiang Fixed-Bed Gasification Indirect Cooling Upgrade Project was completed on schedule, with mechanical installation finished and trial operations of various systems commenced. Author/Source: Zhongke Hefei Gasification Technology Co., Ltd. Date: 2021-10-22 Clicks: 15 ● By the end of September 2021, Phase II of the Shanxi Jinxiang Fixed-Bed Gasification Indirect Cooling Upgrade Project, constructed under the EPC contract by Zhongke Hefei Gasification Technology Co., Ltd., was completed as scheduled; mechanical installation was finished and trial operations of different systems were carried out sequentially. Shanxi Jinxiang Coal Chemical Co., Ltd. was established jointly by Jinneng Holding Equipment Manufacturing Group Co., Ltd. and Yangcheng County Huangcheng Xiangfu (Group) Industrial Co., Ltd., with an annual production capacity of 180,000 tons of synthetic ammonia and 300,000 tons of urea. The gasification unit employs a batch fixed-bed gasification process, and the conventional coal gas cooling and purification system used in it removes dust and reduces temperature through direct water washing, which leads to environmental issues such as the formation of tar and phenol-containing liquids. Based on the existing process, this upgrade eliminates the traditional direct water washing method for dust removal and cooling. Two new systems for dry dust removal using gas filter bags along with indirect cooling are installed. By integrating dry dust removal using filter bags with indirect cooling technology, it is possible to capture gas dust while addressing the problem of high pollution in the circulating water caused by direct water washing. The gas condensate is processed through an ammonia vaporization system to enable the reuse of dilute ammonia water. Since the contract for this project was signed at the end of May this year, the construction took a total of 4 months. During this period, various challenges arose: difficulties in staffing due to the recurring outbreaks of COVID-19, delays in the delivery of key equipment caused by severe floods in Henan (which forced the equipment manufacturers to suspend production temporarily), and reduced available working hours as a result of continuous heavy rains in the project site over several days. Faced with numerous challenges, the project team took proactive measures, reached out to equipment manufacturers and various construction subcontractors, and worked together to create a cohesive force ； Reverse the schedule, assign responsibilities, and ensure the progress of project construction. Ultimately, the mechanical completion target was successfully achieved by the end of September, and feeding and trial operation commenced. At present, the project is operating stably; the temperature and dust content of the gas after dust removal and cooling are both below the design values. The overall environment within the plant has been improved, thereby resolving the challenges related to meeting environmental standards. Before the intercooling modification, the gas generation circulation tank of the gasification unit faced issues such as uncontrolled emission of waste gases, and the settled sludge having to be pressed and filtered before it could be used as fuel. After the modification, the waste gas is conveyed in a sealed manner to the waste incinerator for burning, thereby meeting the requirements for environmentally compliant emissions ； The separated dust is sent directly to the boiler in the form of dry ash for mixing in the fuel, which eliminates the generation of pressure filtration wastewater and reduces production costs. Since its establishment, Zhonghe Gasification has always focused on the market, kept up with industry demands, and continuously pursued technological innovation to address the practical challenges in production. Through the intercooling modification, Zhonghe Gasification enabled the owner to extend the service life of the existing equipment, giving \"new life\" to the fixed-bed batch gasification technology and providing strong support for the owner to achieve good economic and social benefits.