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The clean and efficient conversion technology of smokeless pulverized coal in space furnaces has passed the scientific and technological achievement appraisal

2020-12-02View Original

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The clean and efficient conversion technology for smokeless pulverized coal using space furnace technology has passed the scientific and technological evaluation. According to the Space Engineering Company, on September 10, 2020, at the Fourth China International Gasification Technology and Industry Conference, the company presented the results of the scientific evaluation for this technology. “The appraisal meeting for the scientific and technological achievement of the “Clean and Efficient Conversion Technology of Smokeless Pulverized Coal in Space Furnaces” was held in Beijing on August 27. According to the assessment by the expert panel, the space furnace was successfully applied in the first phase of the million-ton methanol project of the Huayu High-Sulfur Coal Clean Utilization, Chemical, and Thermal Integration Demonstration Project operated by Jinmei Group. Each furnace is capable of processing 1,500 tons of dry coal powder per day, enabling long-term stable operation. The assessment results show that the effective gas (CO+H2) production per furnace in the gasification unit is ≥96,159 m3/h, the oxygen consumption is <339 m3/km3 (CO+H2), the coal consumption per unit of coal fed into the furnace is <614 kg/km3 (CO+H2), the carbon conversion rate is ≥98.5%, the efficiency of cold gas utilization is >2,280.6%, the content of effective gas (CO+H2) is 91.7%, and the ratio of fine slag to coarse slag is 8:2. The assessment figures are superior to the design specifications. The appraisal committee believes that the clean and efficient conversion technology for smokeless pulverized coal using space furnaces possesses independent intellectual property rights, and it enables the safe, clean, and efficient conversion of smokeless pulverized coal; this technology is at the international leading level in the field of smokeless pulverized coal gasification. It is recommended to accelerate the promotion and application of this technology. The clean, efficient, and large-scale industrial application of smokeless coal dust takes place at Shanxi Jinmei Huayu Coal Chemical Co., Ltd. The first phase of this integrated demonstration project for the clean utilization of high-sulfur coal in electricity and heat production, which has an annual methanol production capacity of one million tons, utilizes four φ3800/3800 type space furnaces. On July 15, 2018, the first space furnace was successfully ignited and started operating with coal; on August 18, 2018, the entire system was operational and began producing qualified methanol. In the nearly four months up to the end of the year, 262,000 tons of methanol were produced, generating sales revenue of 660 million yuan. This achieved outstanding results for a large-scale chemical project in China of this type: safe commissioning, rapid operation commencement, and tangible benefits realized within the same year. In 2019, 1.16 million tons of methanol were produced, achieving full production capacity and efficiency. Excluding the impact of the reduced load caused by the pandemic in February 2020, the company’s cost per ton of methanol dropped to 1,118 yuan from March to June; both the cost of methanol production and the total cost reached the best levels among the chemical operations of Jinmei Group. The first phase of the Shanxi Jinmei Huayu High-Sulfur Coal Clean Utilization Project utilizes 4 space furnaces, air separation technology from Air Products in the United States, Qingdao Lianxin’s high-CO and low-water vapor isothermal sulfur-tolerant shift process, low-temperature methanol washing for desulfurization and decarbonization, as well as the Casari methanol synthesis technology, to produce 1.2 million tons of methanol per year.

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