Development of Draft Tube Spouted Bed Coal Gasifier with Circulating Ceramic Particles as Thermal Medium for Hydrogen-rich Gases Production

提出了一种用于煤气化炉的陶瓷颗粒喷动床导流管式反应器，该反应器在较低的温度和常压下可以高效地产生50%以上的氢气。首先，在1994年建造的反应器上，成功地证明了煤气化工艺的1 kg/h进料。这一次，为了进行1 kg/h~2 kg/h的放大实验，通过配备测量装置，实现了反应器性能的显著改善，设计并建造了一种新型反应器，实验运行表明，L阀出现了决定性的功能故障，有望阻止从喷嘴部分向环空部分的旁路气体流动。本次采用陶瓷颗粒作为循环介质的新型反应器进行了冷模实验。研究了旁路流动和管子间隙等操作因素对陶瓷颗粒循环速度的影响，以获得有关旁路流动的基本信息。在冷态模型实验中，引入了收敛喷嘴，显著提高了循环速度。

A spouted bed draft tube type reactor with circulating ceramic particles was proposed for the coal gasifier with which 50% or more hydrogen content gases were efficiently produced at comparatively low temperatures and under atmospheric pressure. At first, 1 kg-coal/h feed for the coal gasification process was successfully demonstrated using a reactor constructed in 1994. This time, to carry out a scale-up experiment from 1 kg-coal/h to 2 kg-coal/h and to achieve the significant improvements of reactor performance by equipping with measurement devices, a new type reactor was designed and constructed.Experimental operations of the reactor informed us the conclusive functional disorder of L-valve, which was expected to stop the bypassing gas flow from the nozzle part to the annulus part. This time, cold model experiments were carried out using the new reactor with ceramic particles as circulating medium. The effects of operating factors such as bypassing flow and tube clearance on the circulating velocity of ceramic particles were investigated to obtain the fundamental information on the bypassing flow. In the cold model experiments, the converging nozzle was introduced to significantly increase the circulating rate.