基于新型高吸收铬鞣方法的铬和氯离子减量排放集成技术
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- 英文论文题名：Integrated Technology Based on a Novel High Exhaustion Chrome Tanning Method to Minimize the Emissions of Chromium and Chloride
- 论文作者：隆佳君 ; 张春晓 ; 彭必雨
- 英文论文作者：LONG Jia-jun ; ZHANG Chun-xiao ; PENG Bi-yu ; Collage of Light Industry ; Textile and Food Engineering ; Sichuan University ; National Engineering Laboratory for Clean Technology of Leather Manufacture ; Sichuan University ; Key Lab.of Leather Chemistry and Engineering of Ministry of Education ; Sichuan University
- 年：2016
- 作者机构：四川大学轻纺与食品学院;制革清洁技术国家工程实验室(四川大学);皮革化学与工程教育部重点实验室(四川大学);
- 论文关键词：无盐浸酸 ; 高吸收铬鞣 ; 鞣制废水 ; 废水循环利用 ; 铬沉淀
- 英文论文关键词：salt-free pickling ; high chromium exhaustion ; tanning wastewater ; wastewater recycling ; chromium precipitation
- 会议召开时间：2016-07-27
- 会议录名称：2016第十一届全国皮革化学品学术交流会暨中国皮革协会技术委员会第21届年会摘要集
- 英文会议录名称：Abstracts of 2016 the 11th National Conference on Leather Chemicals & 21st Annual Convention of China Leather Science and Technology Commission
- 语种：中文
- 分类号：TS543
- 学会代码：ZGHG
- 会议名称：2016第十一届全国皮革化学品学术交流会暨中国皮革协会技术委员会第21届年会
- 会议地点：中国山东济南
- 主办单位：中国皮革协会技术委员会、中国皮革协会皮革化工专业委员会、中国化工学会精细化工专业委员会
- 学会名称：中国化工学会
- 页数：2
- 文件大小：74k
- 原文格式：O
- 会议级别：全国
摘要
研究了一种"无盐浸酸适度蒙囿高吸铬鞣-铬鞣废液直接循环利用-低浓度含铬废液的高效沉淀"集成技术。在不影响革内的铬含量和分布的条件下,铬鞣剂用量减少23%,铬鞣废液铬的浓度降低到100 mg/L以下,可在浸酸-铬鞣过程中直接循环利用10次以上,鞣后工序中的铬释放量明显降低,铬的排放总量从源头上减少84.2%,总有效利用率增大到98.6%;含铬废液进行高效碱处理能使废液中的铬浓度低到1.0-1.2 mg/L,含铬污泥生成量减少28%,综合废水中的铬浓度降低到0.4mg/L以下。该技术实现了铬的高效利用和稳定达标排放。
A technology integrating salt-free pickling,moderately masking,high chrome exhaustion and combination,direct recycling of tanning wastewater and highly efficient removal of Cr from post-tanning floats was investigated.Without negatively influencing on the Cr content and distribution of the leather,the offer of chrome tanning agent could be decreased by 23%,and the Cr concentration of the spent liquors,which could be completely recycled for at least 10 cycles,was reduced to 100mg/L below.The leaching out of chromium in the post-tanning processes was also decreased obviously.Therefore,the discharge of chromium was reduced by 84.2%from the sources,raising the total utilization ratio of Cr to 98.6%.Furthermore,the remained Cr in the wastewater without reused value was removed by means of precipitation with optimized bases,and the residual Cr was at the level of 1.0-1.2 mg/L,the produced chrome-contained sludge was reduced by 28%,the chrome concentration in mixed wastewater streams was0.4 mg/L.The integrated technology could maintain both the efficient utilization of Cr and the discharge meeting the legal standards.
A technology integrating salt-free pickling,moderately masking,high chrome exhaustion and combination,direct recycling of tanning wastewater and highly efficient removal of Cr from post-tanning floats was investigated.Without negatively influencing on the Cr content and distribution of the leather,the offer of chrome tanning agent could be decreased by 23%,and the Cr concentration of the spent liquors,which could be completely recycled for at least 10 cycles,was reduced to 100mg/L below.The leaching out of chromium in the post-tanning processes was also decreased obviously.Therefore,the discharge of chromium was reduced by 84.2%from the sources,raising the total utilization ratio of Cr to 98.6%.Furthermore,the remained Cr in the wastewater without reused value was removed by means of precipitation with optimized bases,and the residual Cr was at the level of 1.0-1.2 mg/L,the produced chrome-contained sludge was reduced by 28%,the chrome concentration in mixed wastewater streams was0.4 mg/L.The integrated technology could maintain both the efficient utilization of Cr and the discharge meeting the legal standards.
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