摘要
本文对热法磷酸塔内的传热及反应过程进行了数值模拟研究,针对云南省磷化工中试基地所提供的磷酸塔的设计结构,探讨了喷磷量的变化及过量空气系数对磷酸塔壁面平均热流、最大热流值、反应温度和磷酸塔出口平均温度的影响规律。模拟结果表明,在固定空气流量或喷磷量的条件下,在过量空气系数较宽的范围内,随着过量空气系数的增加,壁面平均热流、最大热流值和反应温度均呈线性下降规律。当固定空气流量时,随着过量空气系数的增加,磷酸塔出口平均温度也呈线性下降规律,但在喷磷量不变的条件下,磷酸塔出口平均温度随过量空气系数却呈线性增加规律。此外,在相同的过量空气系数条件下,随着喷磷量的提高,磷酸塔壁面平均热流、最大热流值、反应温度和磷酸塔出口平均温度均呈线性增加规律。
Numerical studies on characteristics of heat transfer and reaction have been carried out in a real industrial phosphorus reactor. The predicted results give the variation of the averaged wall heat flux, the maximum wall heat flux, the averaged exit temperature and the maximum reaction temperature changed with the phosphorus mass flow rate and excess - air coefficient. The predicted results show that the excess - air coefficient has remarkable effect on the maximum phosphorus reaction temperature and maximum radiation heat flux in the reactor. Under the condition of lean phosphorus reaction, the maximum wall heat flux , the averaged exit temperature and the maximum reaction temperature are reduced linearly as the excess - air coefficient increasing. When the excess- air coefficient is a constant, as the phosphorus mass flow rate increasing, the averaged wall heat flux, the maximum wall heat flux, the averaged exit temperature and the maximum reaction temperature are increased linearly.
出处
《计算机与应用化学》
CAS
CSCD
北大核心
2002年第1期157-162,共6页
Computers and Applied Chemistry
基金
清华大学与云南省科技合作研究项目(编号：98YQ016)，与云南省化工研究院合作．受云南省科委资助
