均匀设计法优化造纸黑液的湿式氧化法处理工艺

通过均匀设计实验,对造纸黑液进行湿式氧化处理,数据回归得到CODCr、吸光度、浊度的回归方程,各回归方程显著,氧分压对造纸黑液各指标影响最大;研究反应过程中反应温度、氧分压、进水pH值、进水浓度、搅拌强度、反应时间对造纸黑液湿式氧化(WAO)处理的影响,6因素优化的操作条件依次为:180℃、3.0MPa、7.25、5500mg/L、500r/min、60min;在优化的操作条件下,造纸黑液的CODCr、CODCr去除率为1661mg/L、69.8%,吸光度、脱色率为0.63、96.3%,浊度、浊度去除率为661NTU、74.8%.均匀设计法在造纸黑液WAO处理中得到了较好的应用.

Optimization on wet oxidation process of papermaking black liquor with uniform design method

Papermaking black liquor was treated in WAO process with uniform design method. The regression equations on CODCr, absorbance and turbidity were obtained by data regressions, and each regression equation was significant; Oxygen partial pressure showed the greatest impact on each indicator of papermaking black liquor. In the WAO reaction process, reaction temperature, oxygen partial pressure, influent pH value, influent concentration, stirring intensity and reaction time were researched, and the optimized six factors operating conditions were ordinally 180℃, 3.0MPa, 7.25, 5500mg/L, 500r/min, 60min. In these optimized operating conditions, for the papermaking black liquor, CODCr and CODCr removal rate were respectively 1661mg/L and 69.8%, and the absorbance and decolorization rate were respectively 0.63 and 96.3%, and the turbidity and turbidity removal rate were respectively 661NTU and 74.8%. Uniform design method got a better application in papermaking black liquor teeatment with WAO method.