碳酸盐吸附剂在干法烟气脱硫中的热力学评价

V. Kolesnyk, V. Orlyk, V. Zhaivoronok
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摘要

本文对含硫固体燃料燃烧过程中的能耗进行了对比分析,同时将碳酸盐吸附剂(CaCO3, Ca(OH)2, CaO)直接送入锅炉的火空间吸收形成的二氧化硫,与干法烟气脱硫的情况一样。计算是在以化学计量比和三倍过量吸附剂供应吸附剂时进行的。结果表明,在干法脱硫中,CaCO3和Ca(OH)2分解和加热的能量成本或仅加热CaO的能量成本实际上可由二氧化硫封存的二次反应补偿。提出了一种简单实用的测定煤燃烧过程和碳酸盐吸附剂对二氧化硫化学吸附同时流动的稳态温度的方法,该方法对选择一个硫被积极吸收而不形成CaSO4分解的温度范围至关重要。圣经6,图3,表1。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
THERMODYNAMIC EVALUATION OF THE USING OF CARBONATE SORBENTS IN DRY METHODS OF FLUE GAS DESULPHURIZATION
In the article the comparative analysis of energy consumption in the process of combustion of solid fuel containing sulfur compounds, while simultaneously feeding directly into the fire space of the boiler of carbonate sorbents (CaCO3, Ca(OH)2, CaO) for the absorption of formed sulfur dioxide, as is the case in dry methods of flue gas desulphurization, was presented. The calculations were made when supplying sorbents in a stoichiometric ratio and with a triple excess sorbent. It was shown that the energy costs for decomposition and heating of CaCO3 and Ca(OH)2 or only the heating of CaO when applied in the dry method desulphurization are practically compensated by the secondary reactions of the sequestration of sulfur dioxide. A simple and practical method for determining the temperature of a stationary state with simultaneous flow of coal combustion processes and sulfur dioxide chemisorption by carbonate sorbents was proposed, which is essential for choosing a temperature range in which sulfur is actively absorbed without decomposition of CaSO4 formed. Bibl. 6, Fig. 3, Tab. 1.
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