The air separation unit of Shaanxi Jingyi Chemical produces qualified oxygen and nitrogen in a single batch

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Shaanxi Jingyi Chemical’s air separation unit produced qualified oxygen and nitrogen in a single batch. Author/Source: Coal Chemical Industry 114 Forum. Date: January 16, 2020. Clicks: 154. On the afternoon of January 14, 2020, the company celebrated the successful production of qualified oxygen and nitrogen by its air separation unit in one go, as well as the successful completion of the 168-hour trial operation of Generator Set No. 2 in its power station; this marked the full completion and commissioning of both the company’s air separation unit and the generator sets in its power station. The company’s air separation unit began installing its components in April 2019. Through processes such as \"three inspections and four determinations,\" oil circulation, pipeline purging, filling the packing in the air-cooling tower, filling the packing in the water-cooling tower, installing molecular sieve adsorbents, starting up the turbine, conducting joint tests of the unit, performing bare-air cooling, and filling with perlite, it was finally able to produce qualified products. It is particularly worth mentioning that it took only 48 days, from November 27, 2019, when the turbine began its individual testing, to January 14, 2020, when the air separation unit was able to produce qualified oxygen and nitrogen – thus completing the testing tasks ahead of schedule and setting an industry record for the shortest testing time for such units. The steel frame erection of Generator Unit 2 at the company’s power plant began on August 15, 2019. Subsequent tasks included hydraulic testing, cylinder assembly, furnace construction, furnace drying, full-scale startup of the unit, setting the speed of the turbine, grid connection, and trial operation under load. On January 13, 2020, the 168-hour trial operation was successfully completed, with all economic indicators meeting excellent standards. Furthermore, Generator Unit No. 1 successfully passed the 168-hour trial operation on November 24, 2019; with this, the company’s power center is now fully operational. The company’s air separation units and the generator sets in its power stations have been fully constructed and put into operation, representing a significant achievement in terms of project construction and equipment commissioning. This underscores the effectiveness of the company’s decision-making processes, as well as the spirit of teamwork and determination demonstrated by all employees within the company. It greatly boosted morale and lifted spirits. It is reported that the coal tar deep processing and multi-product integrated utilization project of Shaanxi Jingyi Chemical Co., Ltd. is currently the first large-scale coal-based aromatic hydrocarbon production line in China. It achieves comprehensive and systematic utilization of coal on a differentiated basis, representing a new industrial approach to the conversion and utilization of coal. The total investment in the project is 4.6 billion yuan. Once it is operational, it is expected to generate an annual sales revenue of around 4.5 billion yuan, with tax payments of over 600 million yuan. The project will also create employment for more than 1,000 people, offering significant economic and social benefits. The project is located in the Jinjie Industrial Park in Shenmu City, Shaanxi Province. The scale of construction includes a power station comprising 3×240 t/h high-temperature and high-pressure mixed combustion circulating fluidized bed boilers, 2×50 megawatt high-temperature and high-pressure direct air-cooled double-condensing steam turbines, 2×60 megawatt air-cooled generators, as well as civil engineering and installation work for other associated auxiliary systems.