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碱性声化学法溶除盘式热分散机硅酸盐垢的研究(PDF)

《南京林业大学学报(自然科学版)》[ISSN:1000-2006/CN:32-1161/S]

Issue:
2011年04期
Page:
101-105
Column:
研究论文
publishdate:
2011-07-31

Article Info:/Info

Title:
Study on removing silicate scale on disk disperser with the alkaline phonochemistry method
Author(s):
YANG Hong GE Jie ZHANG Hui* PI Chengzhong
Jiangsu Provincial Key Lab of Pulp and Paper Science and Technology,Nanjing Forestry University, Nanjing 210037, China
Keywords:
wastepaper deinking disk disperser silicate scale phonochemistry ultrasonic
Classification number :
TS743+9; TQ1709
DOI:
10.3969/j.jssn.1000-2006.2011.04.021
Document Code:
A
Abstract:
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 %.

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Last Update: 2011-08-13