温度对废矿物油焚烧处置过程中BTEXs释放的影响

以废矿物油中苯系物(BTEXs)为研究对象,实验室条件下模拟废矿物油在空气气氛中的焚烧,并研究烟气中BTEXs的释放强度与焚烧温度的关系。试验条件:焚烧温度梯度为300、500、700、900、1 100 ℃,空气气氛,样品用量1.00 g。研究表明:在300~1 100 ℃的升温过程中,烟气中BTEXs残留率呈减小趋势;苯以外的BTEXs在达到700 ℃后减量效果显著提高,且当焚烧温度为1 100 ℃时,残留率为0~7.6%;苯在300~700 ℃的释放量呈增加趋势,且在700 ℃时焚烧烟气中苯浓度约为样品本底的14倍,在900和1 100 ℃时,提升焚烧温度对烟气中苯的减量效果不明显。

The influence of temperature on BTEXs release in used mineral oil incineration disposal process

The incineration of used mineral oil under the condition of air atmosphere was simulated under the laboratory scale, and the relationship between the release intensity of BTEXs in flue gas and the incineration temperature studied. The experimental condition was as follows: incineration temperature at 300, 500, 700, 900 and 1 100 ℃, air atmosphere, the quantity of used mineral oil about 1.00 g. The results showed that in the increasing process of incineration temperature from 300 to 1 100 ℃, the total BTEXs release showed a trend of decrease. The reduction effect of BTEXs except benzene increased significantly when the incineration temperature was over 700 ℃, and when the incineration temperature was at 1 100 ℃, the residue rate was 0 to 7.6%. The benzene release showed an increased trend under the incineration temperature of 300 to 700 ℃, and at 700 ℃, the amount of benzene in the incineration flue gas was about 14 times of the sample's background content. From 900 to 1 100 ℃, the reduction effect of the benzene in the flue gas was not obvious by increasing the incineration temperature.