Manufacturing process of a three-medium spiral plate heat exchanger

Abstract

The application discloses a manufacturing process of a three-medium spiral plate type heat exchanger, which comprises the following steps: S1, laying spiral plates and pre-plating; S2, welding distance columns on the spiral plates; S3, welding slow flow plates on the distance columns; S4, winding the spiral plates; and S5, plugging the upper and lower ends of the spiral plates. In the step S3, each pair of the distance columns is vertically arranged, and the side wall of the slow flow plate is welded with the side wall of the distance column so that the two ends of the slow flow plate respectively point to the upper and lower ends of the spiral plate. The manufacturing process of the three-medium spiral plate type heat exchanger can form a branch flow channel different from the medium flow direction in the spiral channel by welding the slow flow plate on the distance column, slow down the medium flow rate through the branch flow channel, and thus improve the heat exchange efficiency. Meanwhile, the spiral plates are pre-plated with a heat conduction layer and a waterproof layer, so that energy waste is less during heat exchange, fluid medium corrosion of the spiral plates is avoided, and the service life is prolonged.

Description

Technical Field

[0001] This invention relates to the field of heat exchanger technology, and in particular to a manufacturing process for a novel three-medium spiral plate heat exchanger. Background Technology

[0002] A spiral plate heat exchanger consists of two parallel metal plates rolled into two spiral channels. Heat exchange between hot and cold fluids occurs through the spiral plate walls. It is a highly efficient heat exchange device with advantages such as low cost, small footprint, and excellent heat exchange effect, and is widely used in the chemical industry. Spiral plate heat exchangers typically facilitate the exchange of heat between two media. A single spiral plate heat exchanger uses spiral plates to separate the hot and cold fluids, allowing the liquids to flow in opposite directions within the device, exchanging heat through conduction via the plate walls.

[0003] For heat exchange between three media, traditional spiral plate heat exchangers require at least two independent spiral plate heat exchangers to complete the heat exchange. This not only occupies two spiral plate heat exchangers at the same time, increasing equipment costs, but also complicates the process, increases labor costs, and is inconvenient to operate.

[0004] As described in invention application No. 202010103787.X, in order to reduce equipment space and improve heat exchange efficiency, improvements are generally made to traditional spiral plate heat exchangers by adjusting two spiral plates to create three non-interconnected heat channels within the heat exchanger. However, due to the limitations of the internal structure of the heat exchanger and the presence of three media for heat exchange, even with controlled initial velocity, the flow rate of the media within the equipment is still too fast, making it difficult to achieve efficient heat exchange and causing a series of problems such as energy waste.

[0005] Therefore, considering the aforementioned technical problems, it is necessary to provide a new technical solution. Summary of the Invention

[0006] The purpose of this invention is to provide a manufacturing process for a three-medium spiral plate heat exchanger that can further reduce the flow rate of the medium and improve the heat exchange efficiency.

[0007] To solve the above-mentioned technical problems, the present invention provides a manufacturing process for a three-medium spiral plate heat exchanger, the specific technical solution of which is as follows: A manufacturing process for a three-medium spiral plate heat exchanger includes the following steps. S1. Lay out spiral plates and pre-plat them. Spray a heat-conducting layer onto both sides of the two flat spiral plates and coat a waterproof layer on the outside of the heat-conducting layer. S2. A spacer is welded onto the spiral plate. A spacer perpendicular to the surface of the spiral plate is welded onto one side of one of the spiral plates. This spiral plate is the first spiral plate. The other spiral plate is the second spiral plate. There are multiple spacers evenly distributed on the first spiral plate. S3. Weld flow-retardant plates onto the fixed-distance columns, select multiple pairs of adjacent fixed-distance columns, and weld flow-retardant plates between the two fixed-distance columns. S4. Spiral plate winding: The planar first and second spiral plates are wound into a spiral shape to form a spiral channel, and the first and second spiral plates are adjacent to each other. S5. The upper and lower ends of the spiral plate are sealed. The upper and lower ends of the wound spiral plate are open. Sealing parts are welded to the open ends to seal them. In step S3, the selected pairs of fixed-distance columns are arranged vertically, and the sidewalls of the flow-retarding plate are welded to the sidewalls of the fixed-distance columns so that the two ends of the flow-retarding plate point to the upper and lower ends of the spiral plate, respectively.

[0008] Preferably, in step S3, each pair of spacers includes a first spacer and a second spacer. After the spiral plate is wound, the first spacer and the second spacer are arranged on top of each other and their centers are located on the same vertical line to form a centerline. The flow buffer is S-shaped or Z-shaped and is welded to the first and second spacers respectively, and the two ends of the flow buffer are located on both sides of the centerline respectively.

[0009] Preferably, in step S1, after the thermal conductive layer is sprayed, a layer of graphene slurry is coated on the spiral plate. After the graphene slurry is formed, a graphene layer is formed. A waterproof layer is then coated on the outside of the graphene layer and dried.

[0010] Preferably, in step S3, the width of the flow buffer is smaller than the width of the spiral channel in which it is located, and the width of the flow buffer is greater than half the length of the spacer column.

[0011] Preferably, in step S3, the flow-diverting plates on the spacers of adjacent columns are staggered and arranged in opposite directions, with both ends of the flow-diverting plates extending outward from the first spacer and the second spacer respectively, and the extension length is not less than half the distance between adjacent spacers, forming several longitudinal diversion channels between the flow-diverting plates on the spacers of adjacent columns.

[0012] Preferably, in step S5, the sealing element is a V-shaped strip, and the middle corner of the V-shaped strip is an obtuse angle.

[0013] Preferably, in step S4, the first spiral plate and the second spiral plate are wound at the front end of the heat exchanger body to form a crescent-shaped support ring, and the two support rings are symmetrically arranged.

[0014] The manufacturing process of a three-medium spiral plate heat exchanger according to the present invention has the following beneficial effects: The manufacturing process of the three-medium spiral plate heat exchanger of the present invention improves heat exchange efficiency by welding flow-slowing plates on the spaced columns to form a flow-diverting channel in the spiral channel that is different from the flow direction of the medium. The flow-diverting channel slows down the flow velocity of the medium. At the same time, the spiral plate is pre-plated with a heat-conducting layer and a waterproof layer to reduce energy waste during heat exchange and prevent the fluid medium from corroding the spiral plate, thus extending its service life. Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0015] To more clearly illustrate the technical solution of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 A manufacturing process flow diagram for a three-medium spiral plate heat exchanger; Figure 2 This is a cross-sectional view of a three-medium spiral plate heat exchanger. Figure 3 for Figure 2 A schematic diagram showing the connection between the centrally spaced column and the flow buffer.

[0017] Among them, 1-spiral plate; 11-first spiral plate; 12-second spiral plate; 2-spaced column; 21-first spaced column; 22-second spaced column; 23-centerline; 3-flow buffer plate; 31-diversion channel; 4-V-shaped strip. Implementation

[0018] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention. Example

[0019] Please see Figures 1 to 3 A manufacturing process for a three-medium spiral plate heat exchanger includes the following steps. S1. Lay out spiral plates and pre-plat them. Spray a heat-conducting layer onto both sides of the two flat spiral plates and coat a waterproof layer on the outside of the heat-conducting layer. S2. A spacer is welded on the spiral plate. A spacer perpendicular to the surface of the spiral plate is welded on one side of one of the spiral plates. This spiral plate is the first spiral plate 11. The other spiral plate is the second spiral plate 12. There are multiple spacers evenly distributed on the first spiral plate. S3. Weld flow-retardant plates onto the fixed-distance columns, select multiple pairs of adjacent fixed-distance columns, and weld flow-retardant plates between the two fixed-distance columns. S4. Spiral plate winding: The planar first and second spiral plates are wound into a spiral shape to form a spiral channel, and the first and second spiral plates are adjacent to each other. S5. The upper and lower ends of the spiral plate are sealed. The upper and lower ends of the wound spiral plate are open. Sealing parts are welded to the open ends to seal them. In step S3, the selected pairs of fixed-distance columns are arranged vertically, and the sidewalls of the flow-retarding plate are welded to the sidewalls of the fixed-distance columns so that the two ends of the flow-retarding plate point to the upper and lower ends of the spiral plate, respectively.

[0020] In step S3, each pair of spacers includes a first spacer 21 and a second spacer 22. After the spiral plate is wound, the first spacer and the second spacer are arranged on the top and bottom and their centers are located on the same vertical line to form a centerline 23. The flow buffer 3 is S-shaped or Z-shaped and is welded to the first and second spacers respectively, and the two ends of the flow buffer are located on both sides of the centerline 23 respectively.

[0021] In step S1, after the thermal conductive layer is sprayed, a layer of graphene slurry is coated on the spiral plate. After the graphene slurry is formed, a graphene layer is formed. A waterproof layer is coated on the outside of the graphene layer and then dried.

[0022] In step S3, the width of the flow buffer is less than the width of the spiral channel in which it is located, and the width of the flow buffer is greater than half the length of the spacer column.

[0023] In step S3, the flow-diverting plates on the spacers of adjacent columns are staggered and set in opposite directions. The two ends of the flow-diverting plates extend outward from the first spacer 21 and the second spacer 22, respectively, and the extension length is not less than half the distance between adjacent spacers. Several longitudinal diversion channels 31 are formed between the flow-diverting plates on the spacers of adjacent columns.

[0024] In step S5, the sealing component is a V-shaped strip 4, and the corner of the V-shaped strip is an obtuse angle.

[0025] In step S4, the first spiral plate and the second spiral plate are respectively wound at the front end of the heat exchanger body to form a crescent-shaped support ring, and the two support rings are symmetrically arranged.

[0026] The manufacturing process of the three-medium spiral plate heat exchanger of the present invention is similar to the technical solution described in the invention application with application number 202010103787.X after the heat exchanger is wound and installed. However, the manufacturing process of the three-medium spiral plate heat exchanger of the present application improves the heat exchange efficiency by welding a flow-slowing plate on the spacer column to form a flow-diverting channel in the spiral channel that is different from the flow direction of the medium. The flow-diverting channel slows down the flow rate of the medium. At the same time, a heat-conducting layer and a waterproof layer are pre-plated on the spiral plate to reduce energy waste during heat exchange and prevent the fluid medium from corroding the spiral plate, thus extending the service life.

[0027] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications and variations to the above embodiments within the scope of the present invention.

Claims

1. A manufacturing process for a three-medium spiral plate heat exchanger, characterized in that: Includes the following steps, S1. Lay out spiral plates and pre-plat them. Spray a heat-conducting layer onto both sides of the two flat spiral plates and coat a waterproof layer on the outside of the heat-conducting layer. S2. A spacer is welded on the spiral plate. A spacer perpendicular to the surface of the spiral plate is welded on one side of one of the spiral plates. This spiral plate is the first spiral plate (11), and the other spiral plate is the second spiral plate (12). There are multiple spacers evenly distributed on the first spiral plate. S3. Weld flow-retardant plates onto the fixed-distance columns, select multiple pairs of adjacent fixed-distance columns, and weld flow-retardant plates between the two fixed-distance columns. S4. Spiral plate winding: The planar first and second spiral plates are wound into a spiral shape to form a spiral channel, and the first and second spiral plates are adjacent to each other. S5. The upper and lower ends of the spiral plate are sealed. The upper and lower ends of the wound spiral plate are open. Sealing parts are welded to the open ends to seal them. In step S3, the selected pairs of fixed-distance columns are set vertically, and the sidewall of the flow buffer is welded to the sidewall of the fixed-distance column so that the two ends of the flow buffer point to the upper and lower ends of the spiral plate respectively. In step S3, each pair of fixed-distance columns includes a first fixed-distance column (21) and a second fixed-distance column (22). After the spiral plate is wound, the first fixed-distance column and the second fixed-distance column are set up on the top and bottom and their centers are located on the same vertical line to form a center line (23). The flow-retardant plate (3) is S-shaped or Z-shaped and is welded to the first and second fixed-distance columns respectively. The two ends of the flow-retardant plate are located on both sides of the center line (23). The width of the flow-retardant plate is less than the width of the spiral channel in which it is located, and the width of the flow-retardant plate is greater than half the length of the fixed-distance column. The flow-retardant plates on the fixed-distance columns of adjacent columns are staggered and set in opposite directions. The two ends of the flow-retardant plate extend outward from the first fixed-distance column (21) and the second fixed-distance column (22) respectively. The extension length is not less than half the distance between adjacent fixed-distance columns. Several longitudinal diversion channels (31) are formed between the flow-retardant plates on the fixed-distance columns of adjacent columns.

2. The manufacturing process of the three-medium spiral plate heat exchanger according to claim 1, characterized in that: In step S1, after the thermal conductive layer is sprayed, a layer of graphene slurry is coated on the spiral plate. After the graphene slurry is formed, a graphene layer is formed. A waterproof layer is then coated on the outside of the graphene layer and dried.

3. The manufacturing process of the three-medium spiral plate heat exchanger according to claim 1, characterized in that: In step S5, the sealing component is a V-shaped strip (4), and the corner of the V-shaped strip is an obtuse angle.

4. The manufacturing process of the three-medium spiral plate heat exchanger according to claim 1, characterized in that: In step S4, the first spiral plate and the second spiral plate are respectively wound at the front end of the heat exchanger body to form a crescent-shaped support ring, and the two support rings are symmetrically arranged.

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