SHELL-AND-TUBE HEAT EXCHANGER Russian patent published in 2000 - IPC

FIELD: chemical and power engineering industries. SUBSTANCE: the heat exchanger has a body, coolant feed and discharge pipe connections, lower and upper tube plates with heat-exchange tubes secured in them, partition with cover tubes secured in it, blow-off pipe connections, coolant feed and discharge chambers. Prevention of slime corrosion of the lower tube plate and heat-exchange tubes is attained due to the use of cover tubes secured in the partition, due to it the coolant flow fed to the annular gaps between the heat exchanger and cover tubes catches and carries away the slime from the lower tube plate around the edges of each heat-exchange tube. The dynamic head of the coolant coming out of the annular gaps prevents slime from getting from the upper part of the intertubular space to its lower part. Slime from the upper part of the intertubular space is removed through the blow-off pipe connections. EFFECT: prevented slime corrosion in the zone of maximum acting stresses - the lower tube plate and heat-exchange tubes in the area of their attachment to the lower tube plate. 1 dwg