METHOD OF CLEANING WALL OF HEAT EXCHANGER AND HEAT EXCHANGER HAVING MEANS FOR SAID CLEANING

摘要

PURPOSE: To clean the wall without interrupting the operation by introducing a fluid with solid particles into a space above vertical heat transmitting walls, collecting the particles below the vertical walls and then discharging the particles from a heat exchanger. CONSTITUTION: A medium fed from a pipe 6 to a distribution space 5 below a bottom tube plate 2 flows upward through tubes 4 for heat exchange and passes through a pipe 9 from a collection space 8 above a tube plate 3 before being discharged. Solid particles for cleaning are introduced at an appropriate point of circulation systems 11-16 and passed through a pipe 14, a distributor 15 and a pipe 16. Subsequently, the particles descend through the tubes from a sectral part 11 above the tube plate 3 because of high specific gravity thus cleaning the heat transmitting walls. The particles are deposited and collected in a distribution space 5 where the medium flow is weak and returned through a pipe 12 back to a collector 13. The pipe 16 opens radially inward so that the particles are distributed uniformly on the sectral part 11. Metal or glass may be employed as the material of particles because it is not corroded by the medium and has no adverse effect on the medium.