CO_2作为密相输送载气在GSP气化技术中的应用

Application of CO_2 as dense-phase pneumatic conveying carrier gas in GSP gasification process

介绍了神华宁夏煤业集团烯烃项目GSP粉煤气化技术以CO2作为密相输送载气进行煤粉输送的工业化应用的工艺流程,研究了使用CO2作为密相输送载气对合成气成分的影响,探讨了使用不同载气的操作注意事项。通过对比实际生产过程中采用不同密相输送载气的合成气成分,发现使用CO2作为输送载气时,合成气的质量得到提升,有效气(H2+CO)体积分数提高约2%,N2体积分数降低约6%,提高了气化效率。使用CO2作为输送载气时需注意CO2与N2的性质差异,要配备必要的保温加热措施并及时修正操作参数,防止出现低温结冰、烧嘴烧坏等事故。

CO2 is used as dense-phase pneumatic conveying carrier gas to convey pulverized coal in GSP pulverized coal gasification process of Shenhua methanol-to-olefin project. Introduce its technological process in industrial application. Investigate the influence of CO2 on the component of synthesis gas and points for attention when adopting different carrier gas. Compared with practical production process, study the variation of synthesis gas component when changing carrier gas. The results show that, CO2 helps to improve gasification efficiency and synthesis gas quality,the content of CO and H2 increase about 2 percent, N2 decrease about 6 percent. There are some differences between CO2 and N2 which need to be paid more attention,provide heating and heat preservation equipments, timely correct operating parameters just in case transportation pipelines freeze and nozzle burn out