SU1384908A2 - Vertical shell-and-tube generator - Google Patents

Abstract

The invention relates to heat exchangers operating predominantly with a variable amount of heat transfer medium. The purpose of the invention is to intensify heat exchange by self-cleaning the heat pipes during their vibration. The chambers for cold and hot environments are formed by the housing 8 and the corresponding parts of the 5.4 tube sheet. In the chambers, each heat pipe 1 on a part of the length is made in

Description

duguch

 L x :::; ::

(L

00 00 4: O 00

14)

J

FIG. f

The bellows form 3 and at the ends are provided with guides for the longitudinal movement of the pipe ends. The pulsating nature of the flow of exhaust gases into the chamber for a hot environment

causes a low-frequency vibration of the strong sections of the pipe .1, which ensures the reduction of deposits of scale and scale on the pipes due to self-cleaning under the action of vibration. 2 Il.

The invention relates to heat exchangers operating mainly with a variable amount of heat transfer medium.

 The aim of the invention is the intensification of heat exchange by self-cleaning of heat pipes during their vibration.

FIG. 1 shows a general view of the regenerator; in fig. 2 - node I on ig.1.

The regenerator contains heat pipes 1, consisting of nozzles 2, bellows 3 and a composite tube grille of two detachable parts 4 and 5, Heat pipes are tightly fixed in the tube grid with the help of sleeves

6 and pads 7,

Thermal pipes 1 are located in chambers for hot and cold environments. The hot chamber is formed by the 4 lattices and the housing 8 with the receiving 9 and the outlet 10 nozzles of the hot environment, such as exhaust gases from internal combustion engines. The heat pipes in the chamber are fixed in the guide partitions 11. The cold-medium chamber is formed by part 5 of the grid and housing 12c with inlet 13 and outlet 14 for cold media, such as water for household needs. Both housings 8 and 12 are interconnected by flanges 15 by means of bolted joints 16. The butt over the entire surface of the detachable joint is sealed with gaskets 17. The heat pipes 1 at the ends are equipped with deafening nozzles 18, which are placed in guides 19 rigidly fixed to the bottom of the body 8 with the possibility of longitudinal movement of pipe ends. In the cold environment chamber, the nozzles 18 are rigidly fixed to the brackets 20, which are located

wives in the guides 21 also with the possibility of longitudinal movement.

The heat exchanger operates as follows.

The exhaust gases of the internal combustion engine through the receiving pipe 9 enter the chamber for the hot medium and, the passage between the baffles 11, give off heat to the heat pipes 1 and exit through the pipe 10 from the regenerator. Water for domestic needs through the inlet 13 enters into the housing 12, washes the heat pipes 1 and is heated by the heat transferred by the heat pipes from the hot exhaust gases. Heated to a predetermined temperature (85-90 ° C) the water is discharged to the consumer through the outlet.

When the exhaust gas temperature rises, the pressure in the heat pipes increases Under the action of this pressure, the bellows 3 heat pipes, located in both chambers, are stretched, and the amount of heat transferred increases by increasing the heat exchange surface area. , which leads to a decrease in the amount of heat supplied.

Claims (1)

The pulsating nature of the entry of exhaust gases into the chamber for the hot environment causes low-frequency vibrations of the bellows sections of the tell tubes 1, which reduces the deposits of scale and scale on the heat pipes 1 due to self-cleaning under the action of vibration, and this contributes to heat exchange intensification. Invention Formula Vertical shell-and-tube regenerator auth.St. No. 769288, characterized in that, in order to intensify heat exchange by self-cleaning heat pipes when they vibrate, in chambers for cold and hot environments, formed by enclosures and corresponding parts The tube sheet, each heat pipe, is part of the length of the bellows and is provided at the ends with guide rails for the longitudinal movement of the pipe ends. (.g