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Prospects for the Use of Shenhua Coal in Industrial Boilers Chen Huaizhen, Gu Xiaoyu, Cui Fenghai, Shenhua Coal Transportation and Marketing Company Abstract: This paper discusses the current status of industrial boiler usage in China as well as the relevant requirements for such boilers. It outlines the advantages of Shenhua coal in terms of resources, production, transportation, sales, and performance, as well as the good performance and shortcomings of this coal when used in industrial boilers. The paper also suggests precautions to be taken when using Shenhua coal in industrial boilers and identifies areas that require further research. Keywords: Shenhua coal; industrial boilers; application prospects. 1 Overview: Industrial boilers are widespread and play an important role as heat generation equipment in China. The country’s energy resources and production structure mean that industrial boilers in China will continue to rely on coal for fuel, both now and in the future. The matching between the type of boiler and the fuel used determines the efficiency of the boilers as well as their environmental performance. Currently, industrial boilers across the country consume around 400 million tons of raw coal per year; the efficiency of utilizing this fuel is relatively low, and the pollution resulting from it is one of the main sources of soot-related air pollution in China. Industrial boilers have a small individual capacity and are distributed in various locations, which poses significant challenges to improving their thermal efficiency and addressing pollution issues. An economical and straightforward solution is to focus on the fuel used. 2 Current status and relevant requirements of industrial boilers in China 2.1 Production and usage of industrial boilers in China At present, the vast majority of industrial boilers in China are those with a capacity of 10t/h or less. As of 2001, China had 536,700 boilers in use, with an average capacity of 2.24 tons per boiler. Among the industrial boilers in use in our country, layer-fired boilers account for over 3/4 of them; among these, chain-grate boilers are the most common, making up about 2/3 of the total, with the remainder being other types of boilers such as reciprocating grate boilers. The average efficiency of coal-fired boilers in our country is low (the efficiency of coal-fired boilers in the Shanghai area is shown in Table 2-1). Most of these boilers do not have facilities for flue gas desulfurization or denitrification; they are only equipped with dust removal devices, and some even lack such devices altogether. Table 2-1 Test data on the thermal efficiency of coal-fired boilers in Shanghai Region. Boiler capacity (t/h), Item, Unit: <1, 1, 2, 4; ≥6. Number of boilers: 38, 36, 37, 42, 27. Average thermal efficiency: %, 67.26, 68.41, 72.59, 72.55, 73.41. Chain grate boilers achieve high thermal efficiency abroad, generally exceeding 80%. Compared to foreign boilers, the efficiency of industrial boilers in China still lags far behind. 2.2 Coal quality requirements for industrial boilers To ensure the rational use of coal, the **Quality and Technical Supervision Bureau issued GB/T18342-2001 \"Technical Requirements for Coal Used in Chain Grate Boilers\"; this standard specifies the technical requirements for coal intended for use in chain grate boilers, as detailed in Table 2-2. 286 Table 2-2 Technical requirements for Grade I coal used in chain grate boilers. Parameter, Symbol, Unit, Technical requirement. Particle size ---- mm, 6~25; Limit on undersize fraction ---- %