SU1749682A1 - Multipath heat exchanger - Google Patents

Abstract

SUMMARY OF THE INVENTION: collector chambers for pipe and annular media, to which sections of heat exchanging pipes 2 are connected, are provided with each annular 18 and radial 19 partitions, some of which have flow from one section to another. The design is easy to manufacture and reliable in operation. 6 Il.

Description

I am LA

nineteen

"

S-

&

 FIG. 2

Vi n

YU

with

00

go

The invention relates to heat exchangers used primarily in heating and hot water supply systems for buildings of various purposes, but can be used in other industries as well.

A shell-and-tube high-speed water heater, widely used in heat points of buildings, is known. It consists of a shell-tube with tube plates welded to the ends, welded into them with smooth or profile heat-exchange tubes, supported in a predetermined position by reference partitions assembled into a block and performing spacing and turbulization functions of heat transfer in the annular space. The required heating surface of the water-heating unit is assembled from separate sections, which in the hot water supply systems are connected to the primary heat carrier (heating water) by pipes, and the secondary heat carrier (heated water) by means of bent or welded elements - rolls. In the heat points of the buildings, the water heater sections are mounted on special supporting structures made of metal.

The disadvantages of this design of the water-heating installation are: large overall dimensions, since the center distance between the two sections, depending on its outer diameter, is more than 200 mm; the number of sections in a water-heating installation of a residential building is 7-10 sections; high specific metal content due to the presence of dead space between the tube plates and nozzles; the need to use metal structures for mounting sections.

Technically, the closest to the proposed technical solution is a multi-pass heat exchanger containing a package of heat exchanging sections (elements like a pipe in a pipe) connected to collector chambers for pipe and annular media separated by pipe grids in which internal pipes are fixed, and outer covers are fixed with ends in the walls of the annular chamber chambers. In this case, each chamber is divided by partitions, perpendicular to the tube sheets, into compartments for the series connection of the heat exchange sections to each other in both media.

The disadvantage of this heat exchanger is the complexity of the design of the collector X.cher formed by plates of complex shape and low reliability due to the large number of seals.

The purpose of the invention is to improve the reliability and simplify the design when assembling the package around the central section.

This goal is achieved by the fact that in a multi-pass heat exchanger containing a package of heat exchange sections, successively interconnected and each of which has at least one heat exchange pipe enclosed in a casing, and collector chambers for pipe

and annular media, separated by tube grids in which the ends of the heat exchange tubes are fixed, with partitions perpendicular to the grids and

the separating chambers into compartments, and the housings of all sections are fixed with ends in the walls of the collector chambers for the annular medium; one of the partitions in each chamber is annular with a diameter greater

the diameter of the central section and coaxially installed last, and the remaining partitions are located relative to the annular radially;

one camera compartment to another.

Figure 1 shows the proposed multi-pass heat exchanger; figure 2 - section aa in figure 1 (annular chamber space); on fig.Z - section bb on

figure 1 (tube chamber space); figure 4 is a view In figure 1 (nozzles of the input and output of the heated medium of the first and second stages); figure 5 - block sections of the multi-pass heat exchanger; figure 6 - pipe

board when removed from the chamber of the tube space, front view.

Multi-way heat exchanger contains a package of heat exchange sections 1 of pipes 2, enclosed in housings 3 and collector

chambers 4 and 5 for the annular medium, and 6 and 7 for the tube medium. The chambers 5, 6 and 4, 7 are divided among themselves by tube grids 8 and 9, respectively, in which pipes 2 are fixed. In the walls of chambers 4 and 5

the ends of all housings 3 are fixed. Chamber 7 is provided with nozzles 10 and 11 for inlet and outlet of the tubular medium for the first stage and nozzles 12 and 13 for inlet and outlet for the second stage. On casings 3

nozzles 14 and 15 are placed for the inlet and outlet of the annular medium for the first stage, and 16 m 17 nozzles for the second stage. In the chambers 4-7, partitions are installed perpendicular to tube grids 8 and 9, and in each of these

chambers one / yureborka 18 is made annular with a diameter of a large diameter of the casing 3 of the central section, around which the remaining sections 1 are placed. in another.

The heat exchanger operates as follows.

On the first step:

The multitubular medium through the nozzle 14 enters the annular space of the hood 3 of the first section 1, the compartments and through the chambers 4 and 5 enters the casing 3 of the second section 1 and leaves the apparatus through the nozzle 15, and the medium of the tubular space enters through the nozzle 10 The first pipes 2 of the first section, then through the compartments of the chambers b and 7 into the pipes 2 of the second section and out through the nozzle 11.

On the second stage:

The medium annular space through the pipe 16 enters the casing 3 of the third section 1 and through the compartments of the chambers 4 and 5 enters the casing 3 of the fourth section 1, and then exits through the pipe 17.

The medium of the tube space enters through the pipe 12 into the heat exchange pipes 2 of the third section 1, then into the pipes of the fourth section 1 leaves through the pipe 13.

0

50

five

0

For ease of maintenance and cleaning of the heat exchange tubes 2, the connecting rods are rigidly fixed in the tube sheets 8 and 9 for independent fastening them to the heat exchanger body, which makes it possible to disassemble the collector chambers through the tube space. h

Claims (1)

Claims of the Invention A multi-pass heat exchanger comprising a package of heat exchanging sections connected in series with each other, each of which has at least one heat exchange pipe enclosed in a casing, and collector chambers for pipe and shell-to-pipe media separated by pipe grids in which the ends are fixed. heat exchange tubes, in which chambers for each medium contain partitions perpendicular to tube grids and separating chambers into compartments, and the shells of all sections are fixed with ends in the walls to inter-tube environment chambers, characterized in that, in order to increase the reliability and simplify the design when assembling the package around the central section, one of the partitions in each chamber is annular with a diameter greater than the diameter of the center section casing and installed coaxially with the latter, and the remaining partitions they are located relatively annularly radially, while the part of the partition has windows for the flow of the medium from one chamber compartment to the other. Fi.Z FIG. four t FIG. five