利用石灰石循环煅烧/碳酸化顺序脱碳脱硫的新方法  

A new method for used limestone in calcination / carbonation looping for sequential decarburization and desulfurization

作　　者：周兴[1] 郑之民[1] 刘慧敏[1] 崔彩艳[1] 王春波[1] 

机构地区：[1]华北电力大学能源动力与机械工程学院,河北保定071003

出　　处：《华北电力大学学报（自然科学版）》2014年第1期101-105,共5页Journal of North China Electric Power University：Natural Science Edition

基　　金：河北省自然基金资助项目(E2013502292)

摘　　要：在考虑电厂石灰石-石膏湿法脱硫技术造成的CO2排放的基础上,提出了利用循环煅烧/碳酸化分离二氧化碳过程中失活CaO替代脱硫用石灰石的新工艺.借助半经验公式,以600 MW机组为计算实例,进行了失活吸收剂和脱硫所需吸收剂的物料衡算.结果表明：锅炉排烟含CO2浓度为10％～15％时,保证CO2脱除效率85％～95％之间时,分离CO2排放的失活氧化钙物流为166.96～456.70 mol/s,足以提供脱硫需要的12.26～73.48 mol/s吸收剂同时,可减排因脱硫产生的CO21.94 ～ 11.64 t/h.It had been noticed that in power plant due to limestone-gypsum wet desulphurization technology amount of CO2 was emissioned, we proposed a new method on the basis of limestone cyclic calcination/carbonation process. To make use of deactivationed CaO, some limestone was instend by CaO for desulfurization. Using semi-empirical formu- la, a 600 MW power plant unit was choosen as the calculating examples. Results show that the boiler exhaust contai- ning CO2 concentration from 10 % to 15 % , guarantee the CO2 removal efficiency between 85 % to 95 %. The deacti- vationed CaO mol mass is 166.96 to 456. 70 mol/s due to the separation of CO2 whitch is enough for desulfurization need from 12.26 to 73.48 mol/s, at the same time it can reduce CO2emissions froml. 94 to 11.64 t/h.

关 键 词：钙基吸收剂 失活吸收剂 脱硫 二氧化碳排放 

分 类 号：TQ028.1[化学工程]