New low-temperature denitration process reduces energy consumption in enterprises

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There are two types of conventional denitration: one is medium-to-high temperature denitration, with operating temperatures generally ranging from 300 to 400°C. Another type is low-temperature denitration, with an operating temperature of generally 180°C. A new type of low-temperature denitration process that represents an international advanced level; it enables the operating temperature to be reduced to 160°C, thereby allowing for a reduction of at least 20°C in the amount of steam needed to heat the flue gases. This results in a 75% reduction in operating costs and a 75% reduction in carbon emissions, representing a significant breakthrough in low-temperature denitration technologies in China. The new low-temperature denitration process, compared with similar products on the market, features a lower operating temperature, high resistance to sulfur-induced clogging, excellent ammonia storage capacity, and strong resistance to alkali metal poisoning. It is suitable for denitration of flue gases at low temperatures in industries such as steel manufacturing, coking, metallurgy, cement production, glass manufacturing, ceramics, heating systems, waste incineration, and the shipbuilding industry. The catalyst used in this process not only exhibits high activity at low temperatures but also can withstand sulfur dioxide concentrations up to 2000 mg/m3, ensuring that catalyst poisoning and clogging due to ammonium bisulfate are avoided. Therefore, it is possible not only to desulfurize first and then denitrate, but also to denitrate first and then desulfurize. Due to its strong ability to decompose ammonium bisulfate at low temperatures, the catalyst does not require thermal desorption. This technology and its associated products have been put into practical use in coal-fired boilers, biomass boilers, steel sintering machines, and lime kilns. They exhibit excellent denitration efficiency at low temperatures, enabling compliance with ultra-low emission standards.