基于注入溶气水式新型高浓废纸浆净化技术原理的研究

New Type of Cleaning Principle of High Consistence Pulp from Waste Paper with Adding Dissolved Air Water

中文关键词:  废纸浆  溶气水式  高浓净化原理  高浓锥形除渣器  浆液杂质密度差

Key Words:waste paper pulp  dissolved air water  high consistence cleaning principle  high consistence conical cleaner  pulp and impurities densities difference

中文摘要:

      在剖析现有的废纸浆净化技术原理与方法的基础上,提出了一种创新型高浓废纸浆净化技术，即基于注入溶气水式新型高浓废纸浆净化法。选用典型的废纸浆OCC、ONP,通过模拟实验进一步研究了多种因素对新型废纸浆净化技术净化效率的影响。实验结果表明,当废纸浆浓度为1%～4%、工作压力0.20～0.50 MPa、压差0.20～0.45 MPa,注入的溶气水中水量与原浆中水量之比为60%时,新型废纸浆净化技术的净化效率较传统净化技术提高18.4～27.2个百分点；相同条件下,OCC微溶气浆密度较ONP微溶气浆低13.4%,质量较大的杂质的净化效率较ONP微溶气浆高4.2个百分点。

Abstract:

      It is great significant to study the efficient cleaning principles or methods of the pulp from waste paper, as waste paper has accounted for more than 65% of fiber raw material used in China’s paper industry. On the basis of analysis of the existing waste paper pulp cleaning principles and methods, a new type high consistence waste paper pulp cleaning system by adding dissolved air water was developed. The cleaning efficiencies of two typical waste paper pulps, OCC and ONP, were studied through simulation experiments. The results showed that the cleaning efficiency of the novel cleaning principles and methods was improved compared with the traditional methods. When waste paper pulp consistence was 1%~4%, working pressure was 0.2~0.5 MPa, pressure drop was 0.20~0.45 MPa, the adding proportion of dissolved air water was 60% based on the water contained in the pulp, the separation efficiency of the impurities increased by 18.4%~27.2%. Under the same conditions, due to the density of OCC pulp suspension was about 13.4% lower than ONP pulp suspension, and its cleaning efficiency was about 4.2% higher than ONP pulp suspension.