EA013717B1 - A heat exchange plate of plate-type heat exchanger - Google Patents

Abstract

The invention relates to elements of plate-type heat exchanger via which heat exchange takes place between two mediums (fluids or vapor and fluid). Technical results: leveling hydrodynamic parameters of volume elements of fluid to be either heated or cooled over the plate width at their approaching from an inlet opening via a distribution-collector portion to a main heat-exchange portion and enhancement of the heat-exchange efficiency between two mediums. The heat transfer plate comprises a main heat-exchange portion, distribution-collector potion, holes for providing inflow and outflow of fluid or vapor to be either heated or cooled; channeling: for arranging sealing gaskets, heat-exchange portion, distributor-collector portions, near the openings, wherein the latter are embodied such as to provide different hydrodynamic resistance at the entrance ÔÇô with varied pitch or flatness.

Description

Technical field

The invention relates to plate heat exchanger elements through which heat is exchanged between two fluids (liquids or steam and liquid), assembled together with sealing gaskets in a block designed to separate the heated and cooled fluids, which are located on both sides of the plate.

State of the art

An analogue of the proposed plate can be considered the product described in US patent No. 4678030, which was published on 07/07/1987, IPC Ρ28Ό 9/00. The analogue contains a main heat-exchange part located between two distribution-collector parts, openings located in the corner parts of the distribution-collector parts, corrugations for the location of sealing gaskets, corrugation of the heat-exchange part, corrugation of the distribution-collector parts, corrugation near the holes.

The disadvantages of the analogue are: insufficiently aligned hydrodynamic parameters of the elementary volumes of the cooled or heated liquid along the width of the plate when they approach from the inlet through the distribution-collector part to the main heat exchange part, as a result, the heat exchange between the two media is not high enough.

The closest analogue for the proposed plate can be considered the plate described in the patent of the Russian Federation No. 2110030, which was published on 04/27/1998, IPC Ρ28 основ 9/00, including the main heat exchange part located between the two distribution-collector parts, openings located in the corner parts distribution-collector parts, corrugation for the location of sealing gaskets, corrugation of the heat exchange part, corrugation of the distribution collector parts, corrugation near the holes.

The disadvantages of the closest analogue are insufficiently aligned hydrodynamic parameters of the elementary volumes of the cooled or heated liquid along the width of the plate when they approach from the inlet through the distribution-collector part to the main heat exchange part, and as a result, the heat exchange between the two media is not high enough.

Disclosure of invention

Traditionally manufactured plates for plate heat exchangers usually have corrugations near the holes that do not provide different hydrodynamic resistance around the circumference of the hole. Such plates, assembled together with sealing gaskets in a heat exchanger, provide insufficiently high heat exchange efficiency between the two media due to insufficiently aligned hydrodynamic parameters of the elementary volumes of the cooled or heated liquid along the width of the plate when they approach from the inlet through the distribution-collector part to the main heat-exchange part . In such initial conditions, the movement of elementary volumes of cooled or heated liquid along the main heat exchange part occurs with equalization of hydrodynamic parameters, depending on the flow rate and pressure in various plate heat exchangers from 1/3 to 1/2 of the plate length, which can be observed when analyzing deposits on the plates who have worked in heat exchangers for quite a long time. The analysis of deposits on such plates shows a higher intensity of deposits in the zone of the main heat exchange part from the inlet side and lower intensity from the opposite side. Closer to the outlet, the sediment intensity is leveled off. The unevenness of the intensity of the deposits shows the insufficiently high efficiency of the use of the main heat exchange part of the analogues of the proposed plate.

The objective of the invention is to increase the efficiency of heat transfer between two environments.

Technical results of the invention: alignment of the hydrodynamic parameters of the elementary volumes of the cooled or heated liquid along the width of the plate when they approach from the inlet through the distribution-collector part to the main heat exchange part and increase the efficiency of heat exchange between the two environments.

Technical results are achieved in that the plate heat exchanger plate, assembled together with the sealing gaskets in the block, includes a main heat exchange part located between the two distribution-collector parts, and openings located in the corner parts of the distribution-collector parts, to ensure the inflow and outflow of the cooled or heated liquid or steam, corrugation for the location of sealing gaskets, corrugation of the heat exchange part, corrugation of distribution manifold h astea, corrugations near the holes, made in such a way as to provide different hydrodynamic resistance with its increased value in the region of the smallest path from the inlet to the main heat exchange part and its reduced value in the region of the largest path from the inlet to the main heat exchange part with equalization of the hydrodynamic parameters of elementary volumes of cooled or heated liquid when they approach from the inlet through the distribution manifold part to the main heat exchange part.

Technical results are also achieved by the fact that the corrugations near the holes can be performed with a variable pitch, increasing from the area of the smallest path from the inlet to

- 1 013717 of the main heat exchange part to the region of the largest path from the inlet to the main heat exchange part.

Technical results are also achieved by the fact that the corrugations near the holes can be performed with a variable cavity, decreasing from the region of the smallest path from the inlet to the main heat exchange part to the region of the largest path from the inlet to the main heat exchange part.

Technical results are also achieved by the fact that the distribution-collector part may contain corrugations for the location of sealing gaskets with smooth contours, parts of which are close to equidistant to the holes.

Brief Description of the Drawings

In FIG. 1 is a schematic diagram of a plate heat exchanger plate;

in FIG. 2 is a diagram of the corrugation near holes that are made with a variable pitch;

in FIG. 3 is a diagram of the corrugation near the holes, which are made with a variable canopy.

The implementation of the invention

The plate heat exchanger plate, assembled together with sealing gaskets in the block, includes a main heat exchange part 1 located between two distribution manifold parts 2 and 3, and openings 4, 5, 6 and 7 located in the corner parts 8, 9, 10 and 11 of the distribution collector parts, respectively, corrugation for the location of the sealing gaskets 12, corrugation of the heat exchange part 13, corrugation of the distribution and collector parts 14 and 15, corrugation near the holes 16. Corrugation of the distribution and collector part for the location of the sealing gaskets can be performed with parts with smooth contours 17, which are close to equidistant to the holes 4, 5, 6 and 7.

The plate plate heat exchanger operates as follows. The elementary volumes of liquid moving from the hole 4 along the plate receive greater resistance to movement in the region of the smallest path from the hole 4 to the main heat exchange part 1 and less in the region of the largest path from the hole 4 to the main heat exchange part 1. This ensures equalization of the hydrodynamic parameters of the elementary volumes liquid when they approach from the hole 4 through the distribution-collector part 2 to the main heat exchange part 1.

The manufacture of a plate for plate heat exchangers can be carried out from known materials, for example metals, by known methods, for example by stamping.

Claims (4)

CLAIM 1. Plate heat exchanger plate, including the main heat exchange part located between the two distribution-collector parts, and holes located in the corner parts of the distribution-collector parts, to ensure the inflow and outflow of cooled or heated liquid or steam, corrugation for the location of sealing gaskets, corrugation heat exchange parts, corrugation of distribution-collector parts, corrugation near holes, assembled together with sealing gaskets in a block, excellent in that the corrugations near the openings are made in such a way as to provide different hydrodynamic resistance with its increased value in the region of the smallest path from the inlet to the main heat exchange part and its reduced value in the region of the largest path from the inlet to the main heat exchange part with equalization of hydrodynamic parameters elementary volumes of a cooled or heated liquid when they approach from the inlet through the distribution manifold to the main heat exchange parts. 2. The plate according to claim 1, characterized in that the corrugations near the holes are made with a variable pitch, increasing from the region of the smallest path from the inlet to the main heat exchange part to the region of the largest path from the inlet to the main heat exchange part. 3. The plate according to claim 1, characterized in that the corrugations near the holes are made with a variable cavity, decreasing from the region of the smallest path from the inlet to the main heat exchange part to the region of the largest path from the inlet to the main heat exchange part. 4. The plate according to claim 1, characterized in that the distribution-collector part contains corrugations for the location of sealing gaskets with smooth contours, parts of which are close to equidistant to the holes.