摘要
以二氧化钛煅烧过程热工特性研究为依据，设计二氧化钛煅烧系统及其煅烧窑温度控制系统，并在生产中测试转窑内的温度梯度及煅烧带温度控制灵敏度。结果表明，在二次风、三次风的调节下，可实现距窑尾14m的范围内为干燥区域，温度低于500℃；在距窑尾14．5～25．5m区间为脱水、脱硫区，温度在500～750oC；在距窑尾25．5～38m的区间内为煅烧区，温度基本保持在800℃左右，只是在距窑头1m左右时，温度才有上升趋势，这时晶型已完全发生转化。煅烧窑温度控制系统参数控制方法的稳态、动态性能较好，可以实现系统无超调。
The design of titanium dioxide calcining system and calcining kiln temperature control system was according to the thermal characteristics of titanium dioxide calcination process.The kiln＇s temperature gradient and the calcining zone temperature control sensitivity in production were tested.Results showed that the secondary air and tertiary air can control the temperature under 500 ℃ of the dry areas ranged 14 m from the end of kiln.Away from the kiln end 14.5-25.5 m was the dehydration and desulfurization zone and its temperature in the range of 500-750 ℃.Calcining zone was in the range of 25.5- 38 m and its temperature remained around 800 ℃.Only about 1 m from the begining of kiln,the temperature showed rising trend and the crystal form has been already completed here.The method of control the parameter of the calcining kiln temperature control system have better steady-state and dynamic orooerties, can realize system without overshoot.
出处
《无机盐工业》
CAS
北大核心
2014年第1期61-64,共4页
Inorganic Chemicals Industry
关键词
二氧化钛
热工特性
回转窑
煅烧带
温度控制
titanium dioxide
thermal characteristics
rotary kiln
calcining zone
temperature control
