针对蛋白粉生产工艺尾气的竖直逆流喷淋热回收塔的实验研究

Experimental study on vertical countercurrent spray tower used for waste heat recovery of protein powder process exhaust gas

大豆蛋白粉生产工艺的高温尾气直接排放到大气中会造成环境污染及能源浪费等,据此提出了采用竖直逆流喷淋塔进行尾气余热回收的技术方案,并且搭建了相应的实验台,分析了各参数对喷淋塔热回收性能的影响。结果表明:适度减小喷淋密度和增大风水比均可提升换热效率,而提高喷淋密度和喷淋水进口温度、减小风水比则会使回收的热量增加。因此在实际工程中需综合考虑初投资、回收热量、换热效率及安全性等因素,以确定适宜的运行参数。

To solve the problems of environmental pollution and energy waste caused by the high temperature exhaust gas in the production process of soybean protein powder, proposes a vertical countercurrent spray tower applied to the exhaust waste heat recovery. Establishes an experimental system and analyses the influence of various parameters on the heat recovery performance of the spray tower. The results show that the heat recovery efficiency can be improved by decreasing the spray density and increasing the mass ratio of air to water, meanwhile, the recovered heat increases with the increase of spray density and the inlet temperature of spray water and the decrease of air-water mass ratio. Thus, the factors such as initial investment, heat exchange capacity, heat recovery efficiency and security should be considered during the actual engineering design.