Corrosion-resistant plate heat exchanger

Abstract

The utility model provides a corrosion-resistant plate heat exchanger, which relates to the field of heat exchangers and comprises a heat exchanger body and a filter component. The heat exchanger body comprises a liquid inlet end; the filter assembly comprises a tubular filter sleeve and a magnetic filter screen; the filter sleeve is hermetically communicated with the liquid inlet end; the filter screen is fixed in the filter sleeve; the filter screen separates the liquid inlet and the liquid outlet of the filter sleeve. According to the corrosion-resistant plate heat exchanger, the problems that in the prior art, rust sheets are prone to being accumulated in the heat exchanger, and the interior of the heat exchanger is prone to corrosion due to the accumulated rust sheets are solved, and the corrosion resistance of the plate heat exchanger can be improved.

Description

Technical Field

[0001] This utility model relates to the field of heat exchangers, and more particularly to corrosion-resistant plate heat exchangers. Background Technology

[0002] A plate heat exchanger is a high-efficiency heat exchanger consisting of a series of metal plates with a certain corrugated shape stacked together. Thin rectangular channels are formed between the various plates, and heat is exchanged through the plates.

[0003] For the liquid that needs to exchange heat in a heat exchanger, there will be impurities, which usually include corrosion products. In industrial environments such as chemical plants, pipes and containers that come into contact with acids, alkalis or other corrosive chemicals are particularly susceptible to corrosion. In addition, after the anti-corrosion coating of old equipment fails, the metal surface is easily corroded. The rust produced by this corrosion will enter the heat exchanger with the heat exchange liquid. These rust flakes will not only block the heat exchanger, but since the rust flakes are mainly composed of metal oxides, they can act as an electrode of a micro battery under certain conditions. Since the heat exchanger itself is usually made of metal, for heat exchangers made of metal materials, the rust flakes will also accelerate the corrosion of the non-rusted metal inside the heat exchanger.

[0004] In the prior art, such as the plate heat exchanger with good anti-clogging effect disclosed in Chinese Patent Application No. 202323415145.1, the specific structure and working principle of the plate heat exchanger are explained. By setting a filter assembly at the liquid inlet, the accumulation of impurities within the plate heat exchanger is reduced, thus achieving an anti-clogging effect. The filter assembly is implemented through a filter screen. When using a filter screen to filter the liquid to be exchanged, the pore size of the filter screen must be considered. Small-pore screens can improve the filtration effect on rust and other fine particles, but this will increase the system pressure drop, requiring a better pump, increasing the cost of using this heat exchanger. Furthermore, small-pore screens clog quickly, all of which increase maintenance workload and costs. Utility Model Content

[0005] To address the aforementioned technical problems, the corrosion-resistant plate heat exchanger provided by this utility model can improve the corrosion resistance of plate heat exchangers.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] The present invention provides a corrosion-resistant plate heat exchanger, comprising a heat exchanger body and a filter assembly; the heat exchanger body includes a liquid inlet end; the filter assembly includes a tubular filter sleeve and a magnetic filter screen; the filter sleeve is in sealed communication with the liquid inlet end; the filter screen is fixed inside the filter sleeve; the filter screen separates the liquid inlet and liquid outlet of the filter sleeve.

[0008] The corrosion-resistant plate heat exchanger provided by this utility model preferably has a corrosion-resistant coating on the surface of the filter screen.

[0009] The corrosion-resistant plate heat exchanger provided by this utility model preferably includes a filter screen comprising a filter screen body and a plurality of magnetic ends; the filter screen body comprises a planar filter screen surface; the magnetic ends are fixed on the filter screen surface; the magnetic ends face the liquid inlet of the filter sleeve.

[0010] The corrosion-resistant plate heat exchanger provided by this utility model preferably has a flange connection extending from the outer wall of the filter sleeve.

[0011] The above technical solution has the following advantages or beneficial effects:

[0012] This utility model provides a corrosion-resistant plate heat exchanger, relating to the field of heat exchangers, including a heat exchanger body and a filter assembly; the heat exchanger body includes a liquid inlet end; the filter assembly includes a tubular filter sleeve and a magnetic filter screen; the filter sleeve is in sealed communication with the liquid inlet end; the filter screen is fixed inside the filter sleeve; the filter screen separates the liquid inlet and liquid outlet of the filter sleeve. The corrosion-resistant plate heat exchanger provided by this utility model solves the problem in the prior art where rust easily accumulates inside the heat exchanger, leading to easy corrosion, and can improve the corrosion resistance of the plate heat exchanger. Attached Figure Description

[0013] The present invention, its features, shape, and advantages will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings. Like reference numerals denote like parts throughout the drawings. The drawings are not intentionally drawn to scale; the focus is on illustrating the gist of the invention.

[0014] Figure 1 This is a schematic diagram of the overall structure of the corrosion-resistant plate heat exchanger provided in Embodiment 1 of this utility model.

[0015] Figure 2 This is a schematic diagram of the filter assembly structure of the corrosion-resistant plate heat exchanger provided in Embodiment 1 of this utility model. Detailed Implementation

[0016] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. It should also be noted that the terminology used in this utility model is for describing specific implementations only and is not intended to limit the exemplary implementations according to this application.

[0017] The technical solutions of the present utility model will be described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. Therefore, the detailed description of the embodiments of the present utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely to illustrate selected embodiments of the present utility model. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without inventive effort are within the protection scope of the present utility model.

[0018] Example 1:

[0019] The corrosion-resistant plate heat exchanger provided in Embodiment 1 of this utility model, such as... Figures 1 to 2 As shown, it includes a heat exchanger body 1 and a filter assembly 2; the heat exchanger body 1 includes a liquid inlet end 11; the filter assembly 2 includes a tubular filter sleeve 21 and a magnetic filter screen 22; the filter sleeve 21 is in sealed communication with the liquid inlet end 11; the filter screen 22 is fixed inside the filter sleeve 21; the filter screen 22 separates the liquid inlet and liquid outlet of the filter sleeve 21.

[0020] In actual operation, this embodiment utilizes the heat exchanger body 1 to cool the liquid to be cooled. The liquid to be cooled enters from the inlet end 11, first passing through the filter sleeve 21. Inside the filter sleeve 21, the liquid is filtered by the filter screen 22. Because the filter screen 22 is magnetic, rust flakes in the liquid to be cooled are attracted by it. Compared with conventional filter screens used in the prior art, the magnetic filter screen of this embodiment not only has basic filtration functions but also enhances the filtration effect on rust flakes. For small rust flakes that would normally easily pass through the mesh of ordinary filter screens, the magnetic filter screen of this embodiment can also effectively block them, preventing rust flakes from entering the interior of the heat exchanger body 1, thereby reducing corrosion inside the heat exchanger body 1 and improving the corrosion resistance of the equipment.

[0021] The corrosion-resistant plate heat exchanger provided in Embodiment 1 of this utility model solves the problem in the prior art where rust easily accumulates inside the heat exchanger, leading to easy corrosion inside the heat exchanger, and can improve the corrosion resistance of the plate heat exchanger.

[0022] As a preferred embodiment, the surface of the filter screen 22 is provided with a corrosion-resistant coating. The corrosion-resistant coating protects the filter screen 22, slows down its corrosion rate, and extends its lifespan.

[0023] As a preferred embodiment, in this example, the filter screen 22 includes a filter screen body 221 and a plurality of magnetic ends 222. The filter screen body 221 includes a planar filter screen surface. Magnetic ends 222 are fixed on the filter screen surface. (When the filter screen 22 is fixed inside the filter sleeve 21) The magnetic ends 222 face the liquid inlet of the filter sleeve 21. The magnetic lines of force of the magnetic ends 222 are relatively dense, and rust flakes will be preferentially adsorbed at the magnetic ends 222, which effectively slows down the accumulation rate of impurities at the filter screen body 221. Moreover, the magnetic ends 222 are located on the side of the filter screen 22 facing the liquid inlet of the filter sleeve 21, and are far away from the mesh of the filter screen 22. When the liquid to be exchanged washes over the rust flakes adsorbed on the magnetic ends 222, even if the rust flakes fall off, they will be blocked by the filter screen body 221 and will not enter the heat exchanger body 1.

[0024] As a preferred embodiment, in this embodiment, the outer wall of the filter sleeve 21 extends with a flange connection 3. The flange connection 3 facilitates the connection between the filter sleeve 21 and the outlet pipe of the liquid to be exchanged (the outlet pipe of the liquid to be exchanged has a structure adapted to the flange connection 3; the specific structure and connection method are existing technologies and will not be described in detail here).

[0025] In summary, this utility model provides a corrosion-resistant plate heat exchanger, relating to the field of heat exchangers, including a heat exchanger body and a filter assembly. The heat exchanger body includes a liquid inlet end; the filter assembly includes a tubular filter sleeve and a magnetic filter screen; the filter sleeve is in sealed communication with the liquid inlet end; the filter screen is fixed inside the filter sleeve; the filter screen separates the liquid inlet and liquid outlet of the filter sleeve. The corrosion-resistant plate heat exchanger provided by this utility model solves the problem in the prior art where rust easily accumulates inside the heat exchanger, leading to easy corrosion, and can improve the corrosion resistance of the plate heat exchanger.

[0026] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the contents of the present utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present utility model.

Claims

1. A corrosion-resistant plate heat exchanger, characterized in that, Includes the heat exchanger body and filter assembly; The heat exchanger body includes a liquid inlet end; the filtration assembly includes a tubular filter sleeve and a magnetic filter screen. The filter sleeve is in a sealed connection with the liquid inlet end; The filter screen is fixed inside the filter sleeve; the filter screen separates the liquid inlet and liquid outlet of the filter sleeve.

2. The corrosion-resistant plate heat exchanger as described in claim 1, characterized in that, The filter screen has a corrosion-resistant coating on its surface.

3. The corrosion-resistant plate heat exchanger as described in claim 1, characterized in that, The filter screen includes a filter screen body and multiple magnetic ends; The filter screen body includes a planar filter screen surface; the magnetic end is fixed on the filter screen surface; The magnetic end faces the liquid inlet of the filter sleeve.

4. The corrosion-resistant plate heat exchanger as described in claim 1, characterized in that, The outer wall of the filter sleeve extends to a flange connection.

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