摘要
为解决粉煤固体热载体热解工艺中焦粉无法直接利用,易造成粉尘污染等问题,采用高分子聚合物复配制得SCC-2型复合黏结剂,研究了固体热载体热解焦粉的成型工艺,分析了型焦的物化性质.结果表明：固体热载体热解焦粉最佳成型工艺条件为：固体热载体热解焦粉-3 mm质量分数大于80％;SCC-2型复合黏结剂质量分数为30％,添加量为焦粉质量的15％ ～ 20％.采用SCC-2型复合黏结剂成型的型焦灰分和固定碳略有增加、发热量升高;冷压强度、落下强度和浸水强度均较高,分别达到580 N/个、83％和220 N/个;型焦热稳定性和防水性能好,化学反应性随温度的升高而增大,1 000℃时还原率可达96％,满足工业生产要求.型焦可代替部分块炭使用,有效解决了固体热载体热解焦粉再利用难题,具有较好的推广应用前景.
To direct use fine coke in the process of fine coal pyrolysis with solid heat carrier and reduce pollution,introduce the SCC-2 compound binder which is made from several polymer compounds,research the briquetting technologies and physical and chemical properties of formed coke.The results show that,when the-3 mm particles in fine coke is over 80 percent,the mass fraction of SCC-2 compound binder is 30 percent,the mass of binder account for 15％ to 20％ of the amount of fine coke,the briquetting effect is the best.Due to the SCC-2 type binder,the ash,fixed carbon,calorific value of formed coke increase,the performances of the dried formed coke,the compression strength,dropping strength,compressive strength after immersion of dried formed coke is 580 N per one,83 percent,220 N per one.Its heat stability and water resistance is excellent,its chemical reactivity increase with the rise of temperature,when the temperature is 1000 ℃,the reduction rate can reach 90 percent.The formed coke also can partly replace carbon block,so the new type binder has broad application prospects.
出处
《洁净煤技术》
CAS
2014年第2期44-46,50,共4页
Clean Coal Technology
基金
陕西煤业化工集团有限责任公司基础研究基金资助项目(2013YJY-N-Y-C007)
关键词
固体热载体
焦粉
复合黏结剂
型焦
成型工艺
solid heat carrier
fine coke
compound binder
formed coke
briquetting technology
