烟气循环干法熄焦与热量回收再利用技术研究  

Research on technology of flue gas circulation dry quenching of coke and heat recovery and reuse

作　　者：郑锦涛 王立坤 叶佳澎 Zheng Jintao;Wang Likun;Ye Jiapeng(Shaanxi Shaanbei Qianyuan Energy and Chemical Co.,Ltd.,Yulin 719000,China)

机构地区：[1]陕西陕北乾元能源化工有限公司,陕西榆林719000

出　　处：《能源与环保》2024年第9期169-174,共6页CHINA ENERGY AND ENVIRONMENTAL PROTECTION

基　　金：陕西省科技计划项目(2017ZDCXL-GY-10-03)。

摘　　要：当前利用炽热焦炭冷却处理的过程需要消耗大量的水资源,且存在热能浪费的问题。为此,针对新的烟气循环干法熄焦与热量回收再利用技术展开研究。在干熄炉内令炽热红焦与循环烟气相互接触,在接触过程中令炽热红焦温度下降,当温度降至一定值后由干熄炉底部排出;在此过程中,烟气受炽热红焦温度影响,温度提升并流入干熄焦锅炉内,加热其中的水形成高压或中压蒸汽;烟气温度下降至200℃左右时,利用循环风机再次进入干熄炉内,再次与炽热红焦进行接触换热,实现烟气循环;而高温烟气所形成的蒸汽进入热量回收再利用系统内。实验结果显示,循环烟气流量一致的条件下,烟气内水汽含量越高,焦炭出口温度越低;烟气初始温度越低,焦炭出口温度越低;利用该技术回收的热量进行供热、供汽具有较好的经济效益。The current process of using hot coke for cooling treatment requires a large amount of water resources and there is a problem of heat energy waste.Therefore,research was being conducted on new flue gas circulation dry quenching of coke and heat recovery and reuse technologies.In the dry quenching furnace,the hot red carbon was brought into contact with the circulating flue gas,causing the temperature of the hot red coke to decrease during the contact process.When the temperature dropped to a certain value,it was discharged from the bottom of the dry quenching furnace;during this process,the flue gas was affected by the temperature of the hot red coke,which increased in temperature and flowed into the dry quenching boiler,heating the water to form high-pressure or medium pressure steam;when the flue gas temperature dropped to around 200℃,the circulating fan was used to re-enter the dry quenching furnace and exchange heat with the hot red coke again,achieving flue gas circulation;the steam formed by high-temperature flue gas entered the heat recovery and reuse system.The experimental results show that under the same circulating flue gas flow rate,the higher the water vapor content in the flue gas,the lower the outlet temperature of the coke;the lower the initial temperature of the flue gas,the lower the outlet temperature of the coke;the use of this technology to recover heat for heating and steam supply has good economic benefits.

关 键 词：烟气循环 干法熄焦 热量回收再利用 蒸汽 接触换热 

分 类 号：TQ520.6[化学工程—煤化学工程]