【Ten Years of Great Progress in Chemical Engineering Technology】Development and Industrial Demonstration of SXSY-Type Vertical Furnace Coal Powder Pyrolysis Technology from 2015 to 2021

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Ten years of rapid development in chemical technology – praise for China’s prosperity and strength. This is just a starting point; more participation will make things even more lively. HaiChuan becomes even better with your involvement; we welcome everyone to join in the forum discussions. Be careful with fire as the heat increases in July. ---------------------------------------------- On May 26, 2021, the technological achievement related to the “Development and Industrial Demonstration of SXSY-Type Vertical Furnace Coal Pyrolysis Technology,” developed jointly by Shaanxi Shuangyi Coal Chemical Technology Industry Co., Ltd. and Yulin Coal Chemical Industry Promotion Center, was evaluated in Xi’an by the Shaanxi Petroleum and Chemical Industry Federation. 　　This technology uses coal dust below the size threshold of lump coal (with particle sizes less than 30 mm) as raw material, and employs a SXSY-type vertical furnace to carry out low-temperature pyrolysis of this coal dust in order to produce coke powder, coal tar, and gas. The key technology for continuous and uniform distribution of pulverized coal addresses the issue of air permeability in the furnace ； The key technology of the composite gas collection arrangement inside the furnace enables self-cleaning through particle adsorption, solving the problem of gas-solid separation; the tar dust content is less than 0.2% ； By using vertical multi-channel tubular thermal coke waste heat recovery and dry quenching technology, 0.2 t of 1.2 MPa saturated steam is generated per ton of coke, with over 60% of the thermal coke waste heat being recovered. 　　In May 2020, China’s largest industrial demonstration plant for coal pyrolysis with a capacity of 300,000 tons per year was put into operation at Shuangyi Coal Chemical Company. It has been operating steadily without interruption for just over a year now; all process parameters meet the design specifications, and more than 200,000 tons of semi-coke have been produced to date. 　　The expert committee believes that, compared with traditional vertical pyrolysis furnaces, this technology expands the sources of raw coal and effectively addresses key technical challenges such as system clogging during pulverized coal pyrolysis, high dust content in tar, and difficulty in separation. It offers significant advantages in terms of energy conservation, emission reduction, and overall economic benefits, providing a new approach for the graded utilization of coal. The committee agrees to approve this technology and recommends accelerating its industrial application and promotion.