SU1002796A2 - Heat exchanger - Google Patents

Description

54 HEAT EXCHANGER

The invention relates to heat engineering and can be used in the metallurgical, chemical and other industries of the industry, where there is a need for high-temperature heating of gases.

According to the main author. St. W 802770 is known a heat exchanger comprising a cylindrical body divided by a cylindrical shell into heating and cooling chambers filled with an intermediate bulk coolant and provided in the lower part with gas distribution grids connected to sources of a heated and heated medium. In addition, in opposite sections of the shell two inclined overflow channels are made, the lower edge of one of which is located at the level of the upper edge of the other channel 1.

A disadvantage of the known heat exchanger is the possibility of direct breakthrough of the bulk heat transfer medium from one transfer channel to another, which reduces the heating effect of the heat transfer medium.

The aim of the invention is to intensify heat transfer.

The goal is achieved by the fact that along the axis of the heating chamber and perpendicular to the plane of arrangement of the overflow channels, an additional partition is installed, which forms gaps at its ends with a shell, the size of each of which is equal to the diameter of the overflow channels;

10 Bfcime upper transfer duct. at a distance equal to at least 1.5-2 diameters of the latter.

FIG. 1 shows schematically tr the proposed heat exchanger; FIG. 2 shows section A-A in FIG. one.

The heat exchanger contains a cylindrical body 1, divided into a heating chamber 3 and cooling 4 by a cylindrical shell 2, filled with an intermediate bulk coolant and provided in the lower part with gas distribution grids 5 connected to sources of heated 6 and heating medium 7. Besides

25 addition, in opposite sections of the shell 2 there are two inclined overflow channels 8, 9, the lower edge of one of which 9 is located at the level of the upper edge of the other channel

30 8. Po. camera axes 3 and perpendicular

The plane of the overflow channels 8, 9 additionally has a partition 10, which, with its ends and shell 2, form gaps 11, the size of each of which is equal to the diameter of the overflow channels 8, 9, and the upper cut of the partition 10 is above the upper overflow channel 9 at a distance equal to at least 1.5-2 diameters of the latter.

The heat carrier heated in the heating chamber 3 flows into the cooling chamber 4 and transfers heat to the heating source 6 which liquefies it and, moving along the ring of chamber 4 through channel 8, returns to chamber 3, making a closed loop. The partition 10 in the chamber 3 provides the directional circulation of the bulk coolant from the overflow channel 8 through the gaps 11 to the overflow channel 9 and eliminates the direct leakage of the coolant from channel 8 to the channel 9. The geometry of the chamber 4 eliminates the likelihood of direct leakage through it of the coolant.

The width of the gaps 11 is chosen equal to the diameter of the overflow channels 8, 9 to ensure uniform flow of the flowing heat carrier from the channel 8 to the channel 9 in chamber 3. In order to eliminate the overflow of the boiling layer of the flowing heat carrier through the partition 10, the latter should be raised above the level of the boiling layer 1.5-2 diameters of the overflow channels 8, 9.

Installing the bulkhead in the heating chamber of the bulk heat transfer fluid allows to increase the degree of heat transfer from the heating gas to the heated one by eliminating the direct leakage of the heat transfer medium from the channel to the channel, which contributes to the intensification of heat exchange.

Claims (1)

1. USSR author's certificate No. 802770, cl. F 28 D 13/00, 1976. fff ff