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

In order to realize stable transportation of the pulverized coal dense-phase transportation system for the large scale industrialized GSP gasification tech nology, a study was conducted on the pulverized coal physical property, transportation technique and operation parameters affected to the transportation features.The r esults 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 ther e 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 le ss 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, th e fluidization flow of the feeder could be adjusted from 220-180 m3/h to 90-140 m3/h and the gas flow of the No.1 injector on the pulverized coal transportation pipeline could be adjusted from 7 m3/h to 3 m3/h.After the coal feed, the gas No.2 injectcr would be closed, thus the solid and gas ratio would be increased from 280 kg/m3 to 4 00 kg/m3, the mass flow would be inceased from 42 th to 72 th and the stability of the pulverized coal transportation could be further improved.