无机盐工业
主管:中海油天津化工研究设计院有限公司
主办:中海油天津化工研究设计院有限公司
   中海油炼油化工科学研究院(北京)有限公司
   中国化工学会无机酸碱盐专业委员会
ISSN 1006-4990 CN 12-1069/TQ

无机盐工业 ›› 2025, Vol. 57 ›› Issue (4): 105-110.doi: 10.19964/j.issn.1006-4990.2024-0269

• 环境·健康·安全 • 上一篇    下一篇

响应曲面法优化Cu2+催化废盐炭化除COD工艺研究

李俊(), 周兆安, 刘小文, 毛谙章, 周爱青   

  1. 广东飞南资源利用股份有限公司,广东 肇庆 526233
  • 收稿日期:2024-05-13 出版日期:2025-04-10 发布日期:2025-04-21
  • 作者简介:李俊(1986— ),男,硕士,高级工程师,主要从事含金属废物综合利用及三废处理;E-mail:190622940@qq.com

Study on optimization of COD and fluoride removal on waste salt carbonization process by response surface method

LI Jun(), ZHOU Zhaoan, LIU Xiaowen, MAO Anzhang, ZHOU Aiqing   

  1. Guangdong Feinan Resources Recycling Co.,Ltd.,Zhaoqing 526233,China
  • Received:2024-05-13 Published:2025-04-10 Online:2025-04-21

摘要:

为降低废盐炭化除COD处理的能耗,采用金属催化有机物热分解技术,研究了Cu2+催化废盐炭化除COD工艺,考察了Cu2+用量、反应温度和反应时间对废盐炭化过程除COD的影响,并采用响应曲面法进行了建模优化与验证。结果表明:Cu2+催化废盐炭化除COD效果明显,可在较低温度下得到较高的COD去除率,未加催化剂炭化时,550 ℃炭化的废盐COD去除率为90.45%,添加催化剂后,350 ℃炭化的废盐COD去除率可达92.20%,降温效果显著;影响COD去除率的显著性因素从高到低依次为Cu2+用量、反应温度和反应时间;响应曲面法优化废盐炭化建立的数学模型,其拟合值与实验验证结果的吻合度高,优化后最佳工艺参数为Cu2+用量为0.4%、反应温度为450 ℃、反应时间为0.7 h,此时COD去除率预测值为98.53%,通过3次实验验证,实际COD去除率均值为98.55%,与模型相差0.02%,说明优化条件的准确性与可靠性高。

关键词: 废盐, 低温炭化, 除COD, 催化热解, 响应曲面法, Cu2+

Abstract:

In order to reduce the energy consumption of COD removal by carbonization of waste salt,metal catalyzed organic cracking technology was used.The process of COD removal by Cu2+ catalyzed carbonization of waste salt was studied.The effects of Cu2+ dosage,reaction temperature and reaction time on COD removal in the carbonization process of waste salt were investigated.The response surface method was used for modeling optimization and verification.The results showed that the effect of COD removal by Cu2+ catalyzed carbonization of waste salt was obvious,and higher COD removal rate could be obtained at lower temperature.When the catalyst was not added,the COD removal rate of the waste salt carbonized at 550 ℃ was 90.45%.After adding the catalyst,the COD removal rate of the waste salt carbonized at 350 ℃ could reach 92.20%,so the temperature reduction effect was remarkable.The significant factors affecting COD removal rate from high to low were Cu2+ dosage,reaction temperature and reaction time.The response surface method was used to optimize the mathematical model established by waste salt carbonization.The fitting value was in good agreement with the verification test results.The optimal process parameters after optimization were as follows:the amount of Cu2+ was 0.4%,the reaction temperature was 450 ℃,and the reaction time was 0.7 h.At this time,the predicted COD removal rate was 98.53%.Through three experiments,the average COD removal rate was 98.55%,which was 0.02% different from the model,indicating that the optimization conditions were accurate and reliable.

Key words: waste salt, low temperature carbonization, removal of COD, catalytic pyrolysis, response surface method, Cu2+

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