The characteristics of resource endowment of “rich coal, lean oil, and low gas†in China determine that coal will still be the dominant energy for a long time. Low-rank coal accounts for 55.15% of China's total coal reserves. It has the characteristics of high volatile content, high chemical reactivity, and high moisture content. If it is directly burned as thermal coal, not only thermal efficiency is low, but rich hydrogen-containing organics in coal cannot be used rationally. , is not conducive to the clean and efficient use of coal. Before combustion, the conversion of hydrogen-containing organics in coal to liquid fuels and chemical raw materials through low-temperature pyrolysis will have important economic and social benefits. At the same time, as the degree of mechanization of coal mining increases, the proportion of pulverized coal in total coal mining will increase to 70%-80%, resulting in a rapid increase in the amount of pulverized coal. At present, the commercialized low-temperature pyrolysis technology (coal retorting technology) uses lump coal as a raw material and cannot use pulverized coal, resulting in a large amount of pulverized coal resources that cannot be effectively used, which wastes energy and pollutes the environment. Therefore, the development of pulverized coal pyrolysis technology is particularly important for its comprehensive and efficient use. The pyrolysis process using pulverized coal as a raw material will become the mainstream process for coal pyrolysis and oil extraction. At present, most of the pulverized coal pyrolysis processes developed at home and abroad are faced with problems such as high dust content of tar or difficult to amplify the device capacity during the industrial application process, and solve the problem of high dust content of tar in the pulverized coal pyrolysis process to become pulverized coal heat. Solve the key to the development of technology industrialization. In 2013, he was the leader of the Chinese Academy of Sciences' strategic pilot project, “Key Technologies and Demonstration for Clean Coal and High-efficiency Cascade Utilization of Low-rank Coals†and the fund project of the Institute of Engineering Thermophysics, Chinese Academy of Sciences, “Low-rank coal circulating fluidized bed pyrolysis gasification and combustion. Under the support of key technology research and platform construction and the support of Shenmu County Jinfengyuan Clean Coal Technology Co., Ltd., the research and development team of circulating fluidized bed project of the Institute of Engineering Thermophysics has built 240t/d solid heat in the Caritas Industrial Park in Shenmu County. The carrier pulverized coal low-temperature pyrolysis pilot plant (hereinafter referred to as the pilot plant) has successfully controlled the solid heat carrier combustion furnace and the heat through a series of technological means including original solid material heating, high-temperature material circulation control, and pyrolysis furnace coke discharge. The heat and material exchange between the furnaces is solved, and the organic coupling of combustion and pyrolysis is realized. The pyrolysis tar classification deliming technology integrated with the accurate control of the material level of the pyrolysis furnace, the optimization of the process operation conditions, and the pre-middle and post-deashing of the pyrolysis solution blocks the high-temperature gas countermeasure and reduces the dust of the pyrolysis furnace. It reduces the dust content of oil products, increases the content of tar light components, and ensures the continuous and stable operation of the pyrolysis process of circulating fluidized bed pulverized coal. As of the end of September 2016, the cumulative operating time of the pilot plant exceeded 4000 hours, and a single continuous and stable operation reached 362 hours. The measured tar yield under full load conditions was 8.5% for the coal receiving base, hexane-heptane solubles >70%, and the tar dust content was 0.4%. The operation results show that the pilot plant meets the design requirements, achieves continuous stable operation at full load for a long period of time, and successfully resolves key issues such as low dust content, unstable system operation, and easy blockage of the tar in the low-temperature pyrolysis of pulverized coal. From September 21 to 27, the pilot plant continuously and stably operated for 168 hours, and completed the key equipment performance test, system optimization, and assessment test research. China Petroleum and Chemical Industry Federation also organized its 72-hour on-site calibration work at full load. The on-site calibration expert group fully affirmed the continuous and steady operation of the pilot plant's regulating capacity and highly recognized the quality of tar, and agreed that “the coal pyrolysis-semi-coke partial combustion coupling process based on the circulating fluidized bed technology was developed, with As a solid heat carrier, coke achieves precise control of the pyrolysis reaction temperature through the coordinated control of the solid heat carrier transport, heating and the ratio of the solid heat carrier and the raw coal, and the light oil and heavy oil segmented oil washing process can be used. To meet the requirements of effective tar recovery, the total process flow is reasonable, and the device automatic control scheme is reasonable and feasible.†The successful operation of the 240t/d solid heat carrier pulverized coal pyrolysis pilot plant based on the circulating fluidized bed technology is a follow-up to this technology. The industrial demonstration laid the foundation. The main products of the circulating fluidized bed solid heat carrier pulverized coal pyrolysis process are tar, semi-coke and gas. The tar produced has the characteristics of low moisture content, low dust content, and high light weight components. Catalytic hydrogenation and catalytic reforming of light components in tar can provide basic chemical raw materials such as benzene, toluene, and xylene, which can not only ease the shortage of China's petroleum-based naphtha, but also alleviate the growing demand for aromatics in China. pressure. During the pyrolysis process, the sulfur and nitrogen elements in the coal are eventually converted into hydrogen sulfide, sulfur dioxide, and hydrogen cyanide, ammonia, and other gaseous substances. These pollutants can be efficiently and effectively treated. Semi-coke has the characteristics of low volatility, low sulfur, low nitrogen, etc. It belongs to the category of “clean coal†and can be used as high-quality power fuel or modern gasification coal, and also can be used as a high-quality blast furnace ironmaking injection reducing agent. It can be seen that the pulverized coal pyrolysis technology, as a leading technology for the efficient use of low-grade coal cascades, has significant economic and environmental benefits. Storage Bags,Heavy Duty Oversized Storage Bag,Organizer Tote Storage Bag,Clothes Travel Storage Bag Dongguan C.Y. RedApple Industrial Limited , https://www.redapplebags.com