摘要
通过数学模型求解研究了氧气初始浓度、氯气初始浓度、初始炭矿比对用于四氯化钛生产的复合式气力输送反应器的反应特征和反应性质的影响. 模拟结果表明,增加氧气初始浓度有利于富钛料转化量的提高,但过高的氧气浓度将导致床层内石油焦含量迅速降低,石油焦起不到稀释剂的作用;增加氯气初始浓度有利于富钛料的转化,但浓度过高将不能有效提高转化率;针对富钛料初始含量,MPTB床层存在一个饱和能力,此时富钛料转化量最大;当氧气初始浓度、富钛料初始含量的取值过低时,MPTB将不能达到热量平衡,在合适的氯化温度范围内(700～1100℃)不存在能够稳定操作的温度点.
The multiple-unit pneumatic transport reactor is an innovative reactor suitable for gas-solid reaction system to avoid adhesion and agglomeration or enhance mass transfer rate. The effects of initial oxygen concentration, initial chlorine concentration and initial ratio of petrocoke to ore on the characteristics and behaviors of the multiple-unit pneumatic transport reactor for producing titanium tetrachloride are simulated and analyzed. It is found that the conversion of high grade titania feedstock (HGTF) can be enhanced by increasing the initial concentrations of oxygen and chlorine. But CaCl2 and MgCl2 can not be efficiently diluted by petrocoke while the initial concentration of oxygen is greater enough, and the conversion of HGTF can not be further enhanced by increasing initial concentration of chlorine that is excessively high. Moreover, the limiting conversion of HGTF exists for initial ratio of petrocoke to ore, and the heat balance for MPTB can not be achieved between 973 K and 1373 K while the initial concentration of oxygen or the initial ratio of petrocoke to ore are lower than a certain value.
出处
《过程工程学报》
EI
CAS
CSCD
北大核心
2005年第1期18-22,共5页
The Chinese Journal of Process Engineering
基金
国家自然科学基金资助项目(编号:20306030)
关键词
复合式气力输送反应器
四氯化钛
反应器模拟
一维
multiple-unit pneumatic transport reactor
titanium tetrachloride
reactor simulation
one dimension
