热重分析技术研究石灰石脱硫特性

Study on Desulfuration Characteristics of Limestone with Thermogravimetric Analysis Technique

采用热重分析仪对徐州地区的贾汪、长山、铜山３种石灰石进行了脱硫反应试验，得到了石灰石品种、脱硫温度、ＳＯ２浓度和粒度等对ＣａＯ转化率的影响规律，同时，计算了化学反应速度常数Ｋ和反应速度系数ｂ。当粒度小于０．５ｍｍ时，Ｋ值范围是９．４×１０－４－２２×１０－４ｍ／ｓ；当粒度为０．５—１．０ｍｍ时，ｂ＝１２５４ｍｉｎ－１。当粒度为１．０—２．０ｍｍ时，ｂ＝１１０３ｍｉｎ－１。

thermogravimetric analyzer was used in studying the desulfuration reaction of limestones fromJiawang, Changshan and Tongshan in Xuzhoucity. The effects of limestone type, desulfurationtemperature,the concentration of SO2 and limestone panical size on sorbent conversion rate wereinvestigated; the values of constant K of chemicalreaction velocity and the coefficient b of reactionvelocity were calculated. A particle size of lessthan 0. 5 mm gave a value of K in the range of9. 4 × 10-4 - 22 × 10-4 ms-1;a particle size between 0.5- 1.0 mm, b= 1254 min-1;and a Particle size between 1.0 - 2.0 mm,b = 1103min - 1.