Liquid combustion-supporting sulfur-fixing coal additive and using method thereof

Abstract

The invention discloses a liquid combustion-supporting sulfur-fixing coal additive and a using method of the additive; the liquid combustion-supporting sulfur-fixing coal additive comprises the following components in percentage by weight: 3-7.5% of KMnO4, 3-8% of Cu(NO3)2, 2-7.5% of Fe(NO3)3, 8-18% of Ca(NO3)2, 3.5-6% of Al(NO3)3, 8-18% of KNO3, 0.5-2.5% of NaVO3, and the balance of H2O. The liquid combustion-supporting sulfur-fixing coal additive provided by the invention uses water as a solvent and each component is at an ionic state, has relatively high reaction activity at a high temperature and has high combustion efficiency and an excellent sulfur fixing effect, and the sulfur fixing efficiency is more than 40%.

Description

technical field [0001] The invention relates to the technical field of coal combustion, in particular to a liquid combustion-supporting sulfur-fixed coal combustion additive and a use method thereof. Background technique [0002] Coal-burning additive is a chemical agent added to coal. It is composed of one or more substances, generally solid powder or liquid. Among them, the role of combustion-supporting additives is mainly to promote the complete combustion of coal and increase the burnout rate of coal. , the role of sulfur-fixing additives is mainly to reduce SO in the process of coal combustion 2 Generate concentration. [0003] For coal-burning additives, the prior art contains components such as alkaline earth metal oxides, which are mixed with SO generated by coal combustion. 3 It acts to generate sulfate and play the role of sulfur fixation. In the sulfur-fixing additives used in the prior art, the sulfate generated after the reaction will decompose after the coal...

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Problems solved by technology

The sulfur-fixing additive used in the prior art, the sulfate generated after the reaction will decompose after the coal-fired combustion equipment reaches a certain temperature, which greatly reduces the sulfur-fixing efficiency, so the desulfurization effect is not significant

[0004] The combustion-supporting components in coal-fired additives generally contain chlorine and carbon elements, which are easy to generate HCl and CO under high temperature. 2 and other gases, HCl gas will cause corrosion to combustion equipment, and the CO produced 2 The gas will increase the CO of the whole combustion system 2 emissions, causing additional environmental pollution, and the combustion-supporting effect of existing coal-fired additives is not significant

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