制革浸灰工艺操作液的循环利用过程分析与评价

Characteristics analysis and evaluation of the operation liquid in the closed recycling technology of liming process

本研究针对河北黄骅德富皮革有限公司的BIOSK浸灰工艺循环体系进行操作液取样,分析检测了循环工艺中操作液的pH、总固体、悬浮物含量、石灰含量(以钙离子计)、硫元素含量、氨氮含量、COD含量以及TOC含量。结果表明:浸灰工艺操作液在循环过程中各主要组分表征含量与指标均呈一定的规律性变化,随着循环次数的不断增加,循环过程中的变化初期呈累积增加趋势,然后均在一定范围内趋于平衡稳定,其变化规律揭示了BIOSK制革浸灰工艺操作液封闭循环体系工艺平衡的科学性。通过理论计算与评估显示:该工艺技术可明显减少水的用量,降低化工材料的消耗,经济与环境效益十分显著,具有良好的实用性与推广应用前景。

The operation liquid in liming process recycle system was sampled.And the pH, total solids, suspended solids content, lime content(calculated as calciumion), sulfur element content, ammonia nitrogen content, COD content and TOC content of the liming waste liquid were measured.The results show that during the liming cycle operation, the content and index of each component of its operation liquid have a certain regular change.With the increasing of cycling times, the change of the content and index of the components in the liming bath first accumulated and then stabilized within a certain range.This change reveals the scientific balance of the closed cycle process of the liming process.The theoretical calculation and evaluation suggest that the technology can significantly reduce the usage of water and the consumption of chemical materials.And the economic and environmental benefits are very significant.The technology has good practicability and application prospects for its economic and environmental benefits.