SU992995A1 - Plte-type heat exchanger - Google Patents

Description

The invention relates to plate heat exchangers and can be used for heat and humidity treatment of air and evaporative cooling of water.

Known plate heat exchangers containing a package of flat plates, one of the sides of which is made of porous material, and the other of waterproof, with adjacent plates facing one another porous or moisture-proof side 1.

The disadvantage of these heat exchangers is complicated manufacturing techniques.

A plate heat exchanger is also known, the holder pack of plates having pyramidal protrusions and depressions entering one another in adjacent plates 2.

The disadvantage of this heat exchanger is the low intensity of heat exchange.

The purpose of the invention is to simplify the manufacturing technology and intensify heat exchange.

This goal is achieved by the fact that in a plate heat exchanger containing a stack of plates having

pyramidal protrusions and depressions entering one another in adjacent plates, the plates are made of cellulosic material and have a coating in the form of a fire-resistant polymer or varnish on one of the sides.

The package additionally contains calibrated inserts placed between the protrusions and the depressions of adjacent

10 plates that face one another with respectively coated and uncovered sides.

FIG. 1 shows a heat exchanger; in fig. 2 — node I in FIG. one;

15 in FIG. 3 shows section A-A in FIG. 2

The heat exchanger contains a package of plates 1 having pyramidal protrusions and depressions entering one another in adjacent plates 1. Plates 1

20 are made of cellulosic material and are coated on one side with a layer of fire-resistant polymer or varnish. The package additionally contains calibrated

25 inserts 3, placed between the protrusions and the depressions of the adjacent plates 1, which are facing one another with sides, respectively, having a coating 2 and not having it. Package

30 is placed in the housing 4 with flanges 5,

mounted with studs 6 and limited to rigid mounting angles 7, the heat exchanger is also equipped with an irrigation device 8 with a leveling net 9. The plates 1 of the package form a collection of channels 10, one of which is hydrophilic and 2 is waterproof.

The heat exchanger operates as follows.

Depending on the layout decisions and calculations, air G and irrigated water W can flow directly / countercurrently or crosswise. Air G is blown through the channels Yu in a horizontal or vertical direction. Irrigation device 8 continuously supplies irrigated water in a drop-down stream. Further, the air-water flows in each channel 10 of the heat exchanger acquire a complex translational-rotational motion with a variable speed, since the cross section of the channels 10 is variable. Part of irrigated water. Absorbs

hydrophilic side plates 1, evenly wets it over the entire area and also contributes to the uniform wetting of the opposite waterproof coating 2 of the same channel 10. This is due to drip film flow of irrigated water on the outer surfaces of the plate 1, moving the capillary bound water in the thickness their hydrophilic layer and its aerosol movement between plates 1 due to the influence of air flow and passive turbulization of interacting media when flowing around porous lacquer plates 1 channels 10 eznachitelnogo reflux; under the conditions of evaporative air cooling, in the lower part of the channels 10, the predominant mutual action of air with capillary-bound moisture in the hydrophilic layer of plates 1 is assumed. This allows intensifying the process of air cooling not only in apparent heat, but also through latent heat. In addition, this heat exchanger can effectively clean the treated air. To regenerate the plates, 1 channels 10 of the heat exchanger are periodically washed with abundant flow of water and compressed air. The flanges 5 of the housing 5 and the corners 7 create rigidity of the heat exchanger design and allow hermetically to connect it with the required number of similar heat exchangers to ensure the required performance.

The invention will allow to simplify the manufacturing technology, and to increase the intensity of heat exchange during the heat-humidity treatment of air and evaporative cooling of water.

Claims (2)

1. A plate heat exchanger containing a stack of plates having pyramidal protrusions and depressions entering one another in adjacent plates, distinguished with this that, in order to simplify the manufacturing technology and to intensify heat exchange, the plates are made of cellulosic material and have on one side of the coating in the form of a layer of fire-resistant polymer or varnish. 2. A heat exchanger according to claim 1, characterized in that the bag further comprises calibrated inserts placed between the protrusions and the adjacent plates, which face one another with respectively coated and uncoated sides. Sources of information taken into account in the examination 1. Author's certificate of the USSR W 571669, cl. F 24 F 3/14, 1976. 2. Patent ATCHA 3498372, cl. 165-166, published. 1970. W IV figs