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污染控制技术及原理

Study on sulphur conversion during underground coal gasification of bituminous

摘要：在烟煤炭地下气化模型试验的基础上,研究了气化炉温度、气化工艺等对硫转化的影响;在纯氧气化工艺条件下,煤气中含硫气体的形态和含量主要受温度的影响,产生的H₂S浓度在600～700℃达到最大值为7400mg·m^-3,SO₂在1000℃时达到最大值为270mg·m^-3.在纯氧-水蒸气工艺阶段,煤气中的含硫气体形态主要受煤气中氢气含量的影响,但在纯氧-水蒸气工艺后期,含硫气体量又转变为温度的函数.煤炭地下气化过程中,煤中的硫大

Abstract：Based on UCG model test of bituminous, the influence that sulfide transformed with temperature and gasification process was investigated. At the pure oxygen gasification conditions, the configuration and content of the gas are mainly influenced with temperature. When the temperature increases to 600～700℃, the concentration of H₂S and SO₂ respectively reaches their maximum, 7400mg·m^-3. At the O₂-H₂O_(gas) gasification process, the configuration of sulfur contained gas are changed with the content of hydrogen. But at the terminal stages, the content of the gas is changed as the function of temperature with the influence of hydrogen atmosphere. In the underground coal gasification process, the sulfide mainly exists in coal gas by the sulfur contained gas form. Only a fraction of sulfide distributes in the coal ash, tar and the condensation water.