【摘 要】
：
A 72-h ex situ hard coal gasification test in one large block of coal was carried out.The gasifying agent was oxygen with a constant flow rate of 4.5 m3/h.The surroundings of coal were simulated with wet sand with 11％ moisture content.A 2-cm interlayer of
【机 构】
：
G(l)ówny Instytut Górnictwa (Central Mining Institute),Plac Gwarków 1,40-166 Katowice,Poland;Politec
论文部分内容阅读
A 72-h ex situ hard coal gasification test in one large block of coal was carried out.The gasifying agent was oxygen with a constant flow rate of 4.5 m3/h.The surroundings of coal were simulated with wet sand with 11％ moisture content.A 2-cm interlayer of siderite was placed in the horizontal cut of the coal block.As a result of this process,gas with an average flow rate of 12.46 m3/h was produced.No direct influence of siderite on the gasification process was observed;however,measurements of CO2 content in the siderite interlayer before and after the process allow to determine the location of high-temperature zones in the reactor.The greatest influence on the efficiency of the gasification process was exerted by water contained in wet sand.At the high temperature that prevailed in the reactor,this water evaporated and reacted with the incandescent coal,producing hydrogen and carbon monoxide.This reaction contributes to the relatively high calorific value of the resulting process gas,averaging 9.41 MJ/kmol,and to the high energy efficiency of the whole gasification process,which amounts to approximately 70％.
其他文献
It is difficult to accurately calculate the lump coal rate in a fully mechanized mining face.Therefore,a numerical simulation of the coal wall cutting process,which revealed the crack expansion,development,evolution in the coal body and the corresponding
Membrane distillation (MD) is a promising membrane separation technique used to treat industrial wastewater.When coupled with cheap heat sources,MD has significant economic advantages.Therefore,MD can be combined with solar energy to realize the large-sca
At present,non-pillar entry protection in longwall mining is mainly achieved through either the gob-side entry retaining (GER) procedure or the gob-side entry driving (GED) procedure.The GER procedure leads to difficulties in maintaining the roadway in mi
Melina wood torrefied at 260 ℃ for 60 min was agglomerated with lean grade coal fines into composite briquettes using pitch as binder.Torrefied biomass (3％-20％) and coal fines (80％-97％) were blended together to produce the composite briquettes under a hyd
Four coal samples from Jharia basin,India are treated with nitric acid in glacial acetic acid and aqueous media to find out the chemical,petrographic and spatial structure of the organic mass by X-ray diffraction (XRD) and Fourier Transform Infrared Spect
Aiming at the poor location accuracy caused by the harsh and complex underground environment,long strip roadway,limited wireless transmission and sparse anchor nodes,an underground location algorithm based on random forest and compensation for environment
Tri-flo cyclone,as a dense-medium separation device,is one of the most typical environmentally friendly industrial techniques in the coal washery plants.Surprisingly,no detailed investigation has been conducted to explore the effectiveness of tri-flo cycl
An accurate assessment of root respiration in mine reclaimed soil is important for effectively evaluating mining area ecosystems.This study investigated dynamic changes in root respiration and the contribution of root respiration to total soil respiration
Crude phenols extracted using organic solvent from the wastewater of a typical fixed-bed gasification process was used as a raw material,and the distillation range was analyzed.The wide and narrow fractions of the raw material derived from distillation ra
A tool for calculating the economic and environmental impacts of the use of byproducts of industrial processes that can substitute for perishable resources was presented.This was exemplified by fly ash (the fine fraction of ash originating from coal burne