SU826187A1 - Shell-and-tube heat exchanger - Google Patents

Description

(54) SHELL-TUBE HEAT EXCHANGER

I

The invention relates to heat exchangers for regenerative heating of water and can be used in power engineering.

Closest to the present invention is a shell-and-tube heat exchanger containing a vertical shell with an annular steam distribution chamber in the upper part having a supply pipe and communicating with the annular space through openings made around the perimeter of the side surface of the housing distributing and collecting the collector chambers of the cooling medium located in the lower casing parts 1.

The disadvantage of this heat exchanger is that part of the heat exchange surface in it does not participate in the heat exchange workflow and cools mainly the vapor that is sucked into it.

The purpose of the invention is to improve the operating conditions of the heat exchanger.

This goal is achieved by the fact that the heat exchanger further comprises a suction pipe for non-condensable gases, common to the annulus and the dispensing collector chamber, while in the latter there is a coil connected to the suction pipe.

FIG. 1 shows the proposed heat exchanger; in fig. 2 - section AA on

FIG. one; in fig. 3 shows the node I in FIG. one; on. 4 is a section BB in FIG. one.

The proposed device comprises a casing 1, provided with holes 2, an annular steam distribution chamber 3 with an inlet 4, distributing 5 and collecting 6 collector chambers, suction pipe 7, coil 8, pipes 9, tube boards 10 and 11, upper and lower pipes, respectively 12 for supplying feedwater to pipes, a pipe 13 for its removal, a collector 14 for collecting non-condensable gases, having an opening 15 for discharging these gases, an opening 16 for discharging heating steam drainage, a pipe 17 for discharging steam condensate, transverse partitions 18 and partition 19.

The heat exchanger operates as follows.

The feed water flows through the nozzle 12 of the dispensing chamber 5, washes

the coil 8 and further enters the pipes 9 and the chamber 6 and is discharged through the nozzle 13.

The turbine vapor enters the annular space of the heat exchanger through the pipe 16 and the holes 2, then into the parallel sections formed between the partitions 18 from the side opposite to the pipeline 7, while it is in contact with the walls of the pipes, is condensed. The non-condensable gases and part of the vapor are sucked into the pipeline 7 and directed to the coil 8 located in the dispensing collector chamber 5. The coil 8 passes, the steam coming from the pipeline 7 is condensed, after which the drainage of the heating steam is discharged through the hole 16 and the non-condensable gases are removed through the opening 15. The condensate drains onto the tube plate 11 and is removed from it from the heat exchanger.

The proposed installation of a coil in the collecting collector chamber of the heat exchanger allows an increase in the working surface of heat exchange by 30 m, as well as provide additional vapor condensation.

 (..L

which may occur in non-condensable gases removed from the heat exchanger.

Claims (1)

The invention The shell-and-tube heat exchanger comprising a vertical case with an annular steam distribution chamber in the upper part having a supply pipe and communicating with the annular space through openings made around the perimeter of the side surface of the case distributing and collecting the collector chambers of the cooling medium located in the lower part of the case different in order to improve the operating conditions of the heat exchanger, the latter additionally contains a suction line for non-condensing with gases, common to the annular space and the distributing collector chamber, while the latter is equipped with a coil connected to the suction pipeline. Sources of information taken into account in the examination of I. USSR author's certificate for application No. 2674000. CL. F 28 D 7/00, 1978.