碱性声化学法溶除盘式热分散机硅酸盐垢的研究

综合超声法和化学法去除硅酸盐垢的优点，进行了不同条件下的碱溶法和碱性声化学法溶解硅酸盐垢实验，探索低温、常压条件下清除废纸脱墨热分散盘片硅酸盐垢的可行性及较佳技术参数。研究结果表明：无超声时，15 % NaOH溶液90 ℃反应3 h后的溶垢率只有2405 %；加超声后，5 % NaOH溶液90 ℃或10 % NaOH溶液80 ℃反应1 h后的溶垢率高达60 %；而相同条件下，声化学的溶垢率是碱法溶垢率的401～945倍。超声与化学结合的声化学除垢方法，能够快速、安全、清洁、有效地溶解热分散机盘片上的硅酸盐垢，溶垢率最高可达6327 %。

Study on removing silicate scale on disk disperser with the alkaline phonochemistry method

The comparative tests of removing silicate scale with alkaline-dissolving and alkaline ultrasonic-dissolving methods was carried out considering their merits of ultrasonic and chemical methods,and the feasibility and the optimal technical parameters of removing the silicate scale rapidly and safely at low temperature and normal atmosphere were examined at different conditions of alkaline andultrasonic-alkaline methods.The results showed that the scale-removing efficiency was only 24.05 % when using 15 % NaOH solution at 90 ℃ for 3 h.However,the scale-removing efficiency reached to 60 % in 5 % NaOH solution at 90 ℃ for 1 h or in 10% NaOH solution at 80 ℃ for 1 h when combining with ultrasonic method.It was indicated that the dissolving rate of silicate scale in the ultrasonic solution was 4.01—9.45 times faster than that of in non-ultrasonic solution.Therefore,silicate scale on disk disperser could be dissolved quickly,safely,cleanly and effectively by phonochemistry,the highest ratio of dissolving silicate scale was up to 63.27 %.