摘要
以某船舶涂装车间运行数据为依据,建立了蓄热式高温氧化炉(Regenerative Thermal Oxidizer,RTO)的热力平衡关系式,核算了RTO空载和满载运行的数据,验证了炉温与挥发性有机化合物(Volatile Organic Compounds,VOCs)浓度的关系;讨论了排风量、沸石转轮浓缩倍率、换热器热利用率和VOCs浓度四个关键参数对天然气消耗量的影响.结果显示,入炉VOCs浓度每增加1000mg/Nm^(3),炉温上升约21℃,排风量越小,沸石转轮浓缩倍率､换热器热利用率和VOCs浓度越大,天然气消耗量越低.基于本研究建立的热平衡方程,结合RTO实际工程应用中的注意事项,结果表明,在烘干阶段按照工艺要求的3次/h确定车间最小排风量,将沸石转轮浓缩倍率设定为10~14倍,选用换热器热利用率在0.7以上的换热器能在保证RTO安全运行的前提下显著降低天然气消耗量.
The heat balance equation of Regenerative Thermal Oxidizer(RTO)was established according to actual operating condition of a painting workshop.The no-load and full-load operation data of RTO was calculated,and the relationship between furnace temperature and concentration of Volatile Organic Compounds(VOCs)was verified.On this basis,the influence of four key parameters of exhaust air volume,zeolite runner concentration ratio,heat exchanger heat utilization rate and VOCs concentration on natural gas consumption were discussed.The results show that the furnace temperature increased by about 21℃ for each 1000mg/Nm^(3) growth in the incoming VOCs concentration.The smaller exhaust air volume made the higher zeolite rotor concentration multiplier and heat exchanger thermal utilization rate,and thus resulted in higher VOCs concentration in the RTO.This results could reduce natural gas consumption.The heat balance equation was established in this paper,combined with the considerations in engineering application of RTO.When painting was being dryed,the minimum exhaust air volume of painting workshop was establed on the basis of 3 times/h.The concentration multiplier of zeolite rotor was set to 10~14times,and the heat exchanger with heat utilization rate above 0.7 was selected,which could significantly reduce the natural gas consumption,and ensuring the safe operation of RTO.
作者
覃显益
高乃平
高久唯
潘甲志
高鹏
朱彤
QIN Xian-yi;GAO Nai-ping;GAO Jiu-wei;PAN Jia-zhi;GAO Peng;ZHU Tong(College of Energy and Mechanical Engineering,Shanghai University of Electric Power,Shanghai 201306,China;School of Mechanical Engineering,Tongji University,Shanghai 200092,China;Jiangnan Shipyard(Group)Co.,ltd.,Shanghai 201913,China)
出处
《中国环境科学》
EI
CAS
CSCD
北大核心
2021年第10期4837-4842,共6页
China Environmental Science
基金
上海市2020年度“科技创新行动计划”社会发展科技攻关项目(20dz1207802)。
关键词
蓄热式高温氧化炉
挥发性有机化合物
热力计算
天然气消耗量
regenerative thermal oxidizer
volatile organic compounds
thermodynamic calculation
natural gas consumption
