柠檬酸行业废石膏与CO_(2)的协同矿化与工艺模拟  

Collaborative mineralization and simulation study of waste gypsum and CO_(2) in citric acid industry

作　　者：黄岩 朱梓涵 周子安 孙小婷 董黎明[1] 于素萍 HUANG Yan;ZHU Zi-han;ZHOU Zi-an;SUN Xiao-ting;DONG Li-ming;YU Su-ping(Key Laboratory of Cleaner Production and Integrated Resource Utilization of China National Light Industry,State Environmental Protection Key Lab of Food Chain Pollution Control,Beijing Technology and Business University,Beijing 100048,China)

机构地区：[1]北京工商大学,中国轻工业清洁生产和资源综合利用重点实验室,国家环境保护食品链污染防治重点实验室,北京100048

出　　处：《中国环境科学》2024年第11期6241-6249,共9页China Environmental Science

基　　金：国家自然科学基金项目(41861124004)。

摘　　要：为实现柠檬酸行业生产过程CO_(2)捕集和废石膏资源化的高效协同,基于柠檬酸生产过程的CO_(2)排放特征,开展了利用氯化铵盐浸废石膏溶液吸收CO_(2)工艺条件的研究,并利用Aspen Plus进行了协同矿化的工艺模拟.实验结果表明,1L柠檬酸发酵液产生约20L含80%CO_(2)(V/V)废气;当氯化铵初始浓度为2mol/L且浸提废石膏100min时Ca^(2+)浓度可达0.062mol/L;基于优化的吸收工艺条件可实现矿化33%的CO_(2)并产生约192gCaCO_(3)/kg无水柠檬酸。采用Aspen Plus的全混釜反应器工艺模拟结果表明,当控制CO_(2)进口流量为0.6kmol/h时,控制适宜的氨水和石膏进口流量,可实现CO_(2)达96.4%的矿化率和100%的石膏转化率,协同矿化效果最好.To achieve efficient synergy in carbon capture and utilization of waste gypsum in the citric acid industry,this study was based on the CO_(2)emission characteristics of citric acid production process,and conducted a study on the process conditions of using ammonium chloride leaching waste gypsum solution to absorb CO_(2).Aspen Plus was also used to simulate the synergistic mineralization process.The results showed that approximately 20L of waste gas containing 80%CO_(2)(V/V)was generated from 1L of citric acid fermentation broth.When the initial concentration of ammonium chloride was 2mol/L and the waste gypsum was leached for 100minutes,the Ca^(2+)concentration could reach 0.062mol/L.Based on the optimized absorption process conditions,mineralization of 33%CO_(2)can be achieved and approximately 192g CaCO_(3)/kg anhydrous citric acid can be produced.The simulation results of the fully mixed reactor process using Aspen Plus showed that when the CO_(2)inlet flow rate was controlled to be 0.6kmol/h and the appropriate ammonia and gypsum inlet flow rates were controlled,a mineralization rate of 96.4%for CO_(2)and 100%for gypsum conversion can be achieved,and the synergistic mineralization effect was the best.

关 键 词：柠檬酸行业 废石膏 CO_(2) 协同矿化 Aspen工艺模拟 

分 类 号：X703.5[环境科学与工程—环境工程]