Saiding Furnace solves the problem of smokeless lump coal gasification
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Saiding Furnace Solves the Challenge of Gasifying Smokeless Coals / Author/Source: Sinochem New Network / Date: 2019-07-24 / Clicks: 22. For a long time, the gasification of smokeless coals has represented a challenge in coal gasification technology. Through technological innovation and practical engineering efforts, Sinochem Saiding Engineering Co., Ltd. has developed its own Saiding Furnace, which effectively addresses this issue. The anthracite from Jincheng, Shanxi, features extremely high crush strength, a very low Hargreaves grindability index, and a high ash fusion point above 1500°C, making it the best raw material for traditional fixed-bed atmospheric gasification. Jinmei Jinshi Gaocheng Branch of Shanxi Jincheng Anthracite Coal Industry Group Co., Ltd., and Henan Jinmei Tianqing Coal Chemical Co., Ltd., which were the first to use Siding furnaces in the pressurized gasification of anthracite coal, began operations at the end of 2013; currently, these facilities are operating stably. In engineering applications, Saiding’s pressurized gasification technology for bituminous coal has distinct advantages, such as a low steam-to-oxygen ratio, a high content of useful gases in the raw gas, a low frequency of operation for the ash lock valves, which are among the key maintenance components, and a high online operating rate for the gasifier. At the same time, Sideng’s pressurized gasification technology using bituminous coal pulverized fuel features oil-free and low-dust crude gas. It replaces the traditional quenching + low-pressure waste heat recovery process with a dry dust removal + medium-pressure waste heat recovery process. Additionally, the pretreatment process for gasification wastewater is optimized; the improved wastewater treatment process and its parameters are roughly similar to those used in fluidized bed gasification. Practice has shown that smokeless lump coal is an excellent coal type for the SD furnace coal crushing and pressurized gasification technology. The optimized SD furnace can further reduce investment costs and improve energy utilization efficiency, making it a suitable gasification process for dealing with the \"high calorific value, high ash content, and high sulfur content\" coal types in China.
I see, thanks to the original poster for sharing……
I don’t see what’s so difficult about this supposed challenge It seems that bituminous coal is more suitable for this type of moving bed. However, both the availability and price of anthracite are not advantageous.
Coal with a high ash fusion point is certainly suitable, and Saiding has its advantages.
This post was last edited by shuker666 on 2019-7-29 at 15:57. At present, the biggest challenge associated with Lurgi furnaces is the emission and treatment of waste materials related to environmental protection; everything else is no longer a problem. Listen to Sai Dingyuan’s nonsense – high ash fusion temperature and high resistance to crushing are beneficial for Luchi in the first place; a high ash fusion temperature naturally results in a lower gas-to-oxygen ratio ； The high resistance to crushing reduces the pulverization and pyrolytic decomposition of coal fed into the furnace, thereby decreasing the dust content ； Thus, a higher reaction temperature naturally results in more effective gas; the dry distillation layer of bituminous coal produces almost no coal tar. The separation of gas from water is simple, there is no need for phenol and ammonia recovery processes, and the wastewater treatment system is simpler compared to those used in Tukeyi Ma and similar locations. Therefore, wastewater treatment is not a problem ； The problem lies in waste gas treatment – the constant emission of various organized and unorganized gases as well as under abnormal operating conditions; however, improving environmental protection requires investment). Companies such as Lu’an and Tianji (many of the technical upgrades carried out by companies like Saiding stem from Tianji’s own practical production experiences and insights), as well as Datang and Xintian, have already been operating properly for some time. The biggest advantage is the low investment per furnace unit (a 3.8-meter furnace costs around 30 million); when the ash yield index of coal is greater than 8%, the Lurgi technology is cost-effective, and the coal tar produced as a by-product has a high added value.