多孔板支撑的管壳式换热器在硫酸生产中的应用

Application of gas heat exchangers with perforated supporting plate in sulphuric acid production

综合考虑强化传热性能和制作安装的便利性 ,开发了多孔板支撑光滑管 (或缩放管 )的气体换热器 ,用于硫酸装置转化系统。该换热器采用只需将管子能布置得下的较小壳体 ,并在圆形支撑板上于每根管子周围区域钻一些小孔 ,气流进入换热器壳程后以顺流方式沿管外壁均匀流动 ,靠气流通过小孔时的收缩与扩张产生一定的湍流 ,强化传热。实际运行压降较低 。

The gas heat exchanger consisting of plain tubes or contracted expanded tubes supported by perforated plate was developed for conversion section of sulphuric acid plant on the basis of a comprised consideration of heat transfer enhancement and convenience in making and construction. The heat exchanger adopts a small diameter shell that just can hold all tubes and supporting plate in which some holes are drilled around tubes. Gas on shell side of heat exchanger flows parallelly along tube wall and turbulence is created by contraction and expansion of gas passing through the holes in the supporting plate.Practical operation proved that the heat exchanger had low pressure drop and good heat transfer performance.