SU941845A1 - Plate-type heat exchanger - Google Patents

Description

one

The invention relates to plate heat exchangers and can be used in a cryogenic process plant and refrigeration industry when working with high pressure working media.

Plate heat exchangers are known, containing a package of perforated plates alternating with intermediate elements provided with windows / forming circular plates with plates for the working media.

A disadvantage of heat exchangers is the low compactness and complexity of the design.

The purpose of the invention is to improve the compactness and simplify the design when working with high pressure media.

This goal is achieved by the fact that the channels of the SPN from media are located around the circumferences around the channels of the second season, have a diameter not exceeding one third of the channel diameter for this second medium, and are located relative to the latter at a distance not exceeding half calculated togasin their walls.

The drawing shows the proposed teploobmnnvk.

The heat exchanger ss holds vz n forged plates 1, alternating with intermediate elements, equipped with windows, formed from plastvam 1 in channels 3 and 4 of circular section for working media. Channels 4, which are located around the circumferences around the channels 3 of the second medium, have a diameter not exceeding one third of the diameter of the channels 3, are located relative to the latter at a distance not exceeding half the calculated thickness of their walls. Channels 3 are equipped with stream splitters 5, formed by areas that are not perforated in plastia 1.

The heat exchanger also contains collectors 6 installed on the ends of the package. In each collector 6 there are cone-shaped cavities 7 and 8 for pedvsp and for discharging working cavities. media to channels 3 and annular channels 9 for supplying and discharging working medium to channels 4. Channels 9 intersect one another with the formation of sections 1O, one of which is connected to fitting 11 by means of channel 12, tuned in collector 6.

The cavity 7 in the collector 6 is connected to a distribution tapered cavity 13, which in turn

connected to fitting 14 and cavities 8 by means of radial and axial channels 15 and 16. In radial channels

15 plugs are installed 17. The heat exchanger is assembled using assembly

rods 18 passing through the corresponding openings in the collectors 6, plates 1 and intermediate elements - Geh 2.

Channels 4 in the package are located at a distance (5 from channels 3, equal to half of the calculated for the working pressure wall thickness of channel 3. At the same time, amp; Q thickness of the channel wall

3 taking into account the actual placement of channels 4 in it is equal to the sum of doubled spacing (f between channels 3 and 4 and the diameter of channel 4. The distance between channels 4 is less than the distance between channels 3 and 4, therefore, channels

4 are located essentially in the walls of the channels 3, so that it ensures the use of the heat exchanger when working with high pressure media without increasing the relative thickness of the walls of the channels, 3 and 4, since one of the media is in channels 4 of smaller diameter, located around circumferences 3 channels of larger diameter. This makes it possible to increase the strength and compactness of the heat exchanger.

The heat exchanger operates as follows.

One of the working media, for example, cooled under high pressure, flows through the fitting 14 of the collector 6 into the cavity 13, from which it goes into the cavity 7 and the radiating channels 15 into the cavity 8 and then into the channels 3 of the package. 8 collector 6, installed on the opposite end of the package, where likewise through radial channels

15 is combined in the cavity 13 into a common flow and through the nozzle 14 is withdrawn from the heat exchanger.

Another cooling medium through manifold 11 of collector 6 enters channel 12, from where it is distributed through section 1O through all channels 9, from which it is directed into channels 4, the passage of which enters channel 9 of the opposite collector 6 and further through section 1O channel 12 and nozzle 11 are removed from the heat exchanger. The heat exchange between the media takes place due to the thermal drive of the perforated sections of the plates 1 in channels 3 and 4 and the thermal conductivity of the walls of the channels 3 and 4 formed by the plates 1 and the intermediate elements 2.

The supply of the working media to the collectors 6 can be carried out both from the side of one of the package ends with the coil and from the opposite side - countercurrent

The invention allows to increase the compactness and simplify the design of the heat exchanger when working with high pressure media.

Claims (1)

1. USSR author's certificate in application number 2781456 1, CL28 F 3/00 1979. / J 7 /five f6