摘要
为了强化碱式硫酸铝脱硫富液解吸性能,首先搭建了负压解吸实验系统,然后借助动力学工具建立了负压60 kPa解吸动力学方程,进一步对比常压解吸研究了负压强化解吸的微观机制与宏观性能。结果表明:最大瞬时解吸速率均出现在解吸反应初始时刻。解吸反应速率r与[SO_(3)^(2-)]^(1.36±0.07)、[H^(+)]^(0.61±0.02)成正比,活化能E_(a)为(22.78±0.12)kJ/mol,指前因子A为(12 332.58±0.36)L^(0.97)/(mol^(0.97)·min)。反应速率常数k是解吸反应速率的主要影响因素,60 kPa负压解吸的E_(a)和A分别是常压解吸的0.55倍和0.01倍。负压有效地增强了同温度下常压解吸的宏观解吸性能。负压相对常压解吸不同温度下的解吸率提升程度在50 min出现最大值,分别为25.06%、28.44%、21.78%;解吸终点解吸速率提升程度维持在(3.36±0.18)×10^(-4)mol/(L·min)。研究结果为碱式硫酸铝解吸法脱硫的应用提供可靠的理论支撑。
In order to strengthen the desorption performance of basic aluminum sulfate desulfurization rich solution,a negative pressure desorption experimental system was first built,and then the desorption kinetic equation of negative pressure 60 kPa was established by means of kinetic tools,the micro-mechanism and macro-performance of negative pressure enhanced desorption were further studied by comparing with normal pressure desorption.The results show that the maximum instantaneous desorption rate appears at the initial time of desorption reaction.The desorption reaction rate r is proportional to [SO■]~(1.36 ±0.07) and [H~+]~(0.61±0.02),the activation energy E_(a) is(22.78±0.12) kJ/mol,and the pre-exponential factor A is(12 332.58± 0.36) L~(0.97)/(mol~(0.97)·min).The reaction rate constant k is the main factor affecting the desorption reaction rate.The E_(a) and A of negative pressure desorption at 60 kPa are 0.55 times and 0.01 times that of normal pressure desorption,respectively.The negative pressure effectively enhanced the macroscopic desorption performance of atmospheric desorption at the same temperature.The increase degree of desorption rate of negative pressure relative to atmospheric pressure at different temperatures reaches the maximum value of 25.06%、28.44% and 21.78% respectively at 50 min.The increase of desorption rate at the end of desorption is maintained at(3.36±0.18)×10~(-4) mol/(L·min).The research results provide reliable theoretical support for the application of basic aluminum desorption desulfurization.
作者
刘运巍
张子敬
杨淼
王聪宇
李中义
云峰
LIU Yun-wei;ZHANG Zi-jing;YANG Miao;WANG Cong-yu;LI Zhong-yi;YUN Feng(College of Energy and Power Engineering,Inner Mongolia University of Technology,Hohhot 010051,China)
出处
《科学技术与工程》
北大核心
2024年第26期11473-11480,共8页
Science Technology and Engineering
基金
国家自然科学基金(51966011,51566013)
内蒙古自治区直属高校基本科研业务费项目(JY20220309)
内蒙古自然科学基金(2019MS05074,2023MS05017)
内蒙古工业大学科学研究项目(BS201923)。
关键词
脱硫富液
反应动力学
负压
解吸率
解吸速率
desulfurization rich solution
reaction kinetics
negative pressure
desorption ratio
desorption rate
