Ceramic shell-and-tube type heat exchanger and method for manufacturing the same

摘要

A method for manufacturing a ceramic shell-and tube type heat exchanger provided with fins, includes the steps of: inserting heat transfer tubes (2) of sintered tubular ceramic into throughholes of tube plates (1a, 1b) of unsintered plate-like ceramic each having a plurality of the throughholes for fixing the heat transfer tubes inserted thereinto; standing the heat transfer tubes vertically to a floor surface; positioning the tubular plates at both the upper and lower end portions of the heat transfer tubes; disposing between the tube plates many fin plates (6) of unsintered ceramic so as to pile up the fin plates in the direction of a length of the heat transfer tubes, each of the fin plates including: a thin plate (6a) having a plurality of throughholes for fixing the heat transfer tubes inserted thereinto, and protrusions (6b) formed on the both edge portions of the thin plate; firing them so as to unitarily join them by the utilization of differences of firing shrinkage ratios among the heat transfer tubes, the tube plates, and the fin plates; and removing the protrusions from the fin plates. Deformation of heat transfer tubes in a process of firing join can be effectively controlled. A jig for positioning tube plates is not necessary upon firing join because the tube plates are supported by fin plated and can be positioned in a predetermined place. Fin plates function as fins for enlarging a heat transfer area outside heat transfer tubes by removing the protrusions after firing join.