GSP气化技术煤粉密相输送系统稳定性研究  

Study on Stability of Pulverized Coal Dense-Phase Transportation System for GSP Gasification Technology

作　　者：吴跃[1] 李刚健[1] 井云环[1] 罗春桃[1] 

机构地区：[1]神华宁夏煤业集团有限责任公司煤炭化学工业分公司,宁夏银川750411

出　　处：《煤炭科学技术》2012年第12期111-113,117,共4页Coal Science and Technology

基　　金："十一五"国家科技支撑计划资助项目(2007BAA08B01)

摘　　要：为实现大规模工业化GSP气化技术煤粉密相输送系统的稳定输送,研究了煤粉物性、输送工艺、操作参数对输送特性的影响。结果表明:当煤粉湿含量由6.9%降到4.2%时,锁斗下料顺畅,减压系统偶尔出现堵塞。采用压差控制输送煤粉时,煤粉质量流量波动大于20 t/h,而采用流量调节控制煤粉输送时,煤粉质量流量波动小于5 t/h,因此,采用流量调节控制时,煤粉输送稳定性大幅提高。当操作参数进料器流化气量由220～180 m3/h调整为90～140 m3/h时,煤粉输送管线注射器1气体的流量由7 m3/h调整为3 m3/h,投煤后关闭注射器2,可使固气比由280 kg/m3增加到400 kg/m3,质量流量由42 t/h增加到72 t/h,进一步提高了煤粉密相输送系统的稳定性。In order to realize stable transportation of the pulverized coal dense-phase transportation system for the large scale industrialized GSP gasification technology, a study was conducted on the pulverized coal physical property, transportation technique and operation parameters affected to the transportation features. The results showed that when the moisture content of the pulverized coal was reduced from 6. 9% to 4. 2%, the coal discharging from lock hopper would be smoothly and there would be few jamming occurred in the pressure reduction system. When the pressure difference control applied to the pulverized coal transportation, the mass flow of the pulverized coal would be over 20 t/h. When the flow adjustment control applied to the pulverized coal transportation, the mass flow of the pulverized coal would be less than 5 t/h. Thus when the flow adjusted control applied, the stability of the pulverized coal transportation would be highly improved. When the parameters operated, the fluidization flow of the feeder could be adjusted from 220- 180 m^3/h to 90- 140 m^3/h and the gas flow of the No. 1 injector on the pulverized coal transportation pipeline could be adjusted from 7 m^3/h to 3 m^3/h. After the coal feed, the gas No. 2 injecter would be closed, thus the solid and gas ratio would be increased from 280 kg/m^3 to 400 kg/m^3, the mass flow would he ineeased from 42 t/h to 72 t/h and the stability of the pulverized coal transportation could be further improved.

关 键 词：煤粉 GSP气化 密相输送 气流床 煤气化 

分 类 号：TQ536[化学工程—煤化学工程]