Investigation on the Influencing Factors of Sintering Characteristics of Huolinhe (HLH) Lignite Ashes

摘要

The sintering temperature of coal ashes plays a great important role in the design and operation of fluidized-bed gasifier. The sintering temperatures (Ts) of Huolinhe lignite (HLH)ashes under different atmospheres and pressures were tested by self-made pressure-difference measuring system. The results show that the Ts under reducing atmosphere (H_2, CO or the mixture of 50% CO and H_2, volume ratio) are lower than those of under oxidizing atmosphere(O_2, CO_2, N_2). The Ts of HLH ashes decrease with the pressure increase, it changes slightly under low pressure, and decrease clearly under 0.7~1.0 MPa, after that, decrease slightly again with the pressure increase further.