TWI634306B - Plate type heat exchanger, isolation plate for plate type heat exchanger, and method for manufacturing isolation plate - Google Patents

Abstract

An isolation plate for a plate heat exchanger includes: a metal plate for corrosion resistance; a metal plate for heat conduction; and a metal plate for welding; wherein the metal plate for corrosion resistance, the metal plate for heat conduction and the metal plate for welding are based on A predetermined sequence is bonded into a three-layer composite structure of insulation panels, and the insulation panels are formed into insulation panels having a specific cross-section.

Description

Plate type heat exchanger, isolation plate for plate type heat exchanger, and method for manufacturing isolation plate

The present invention relates to a plate heat exchanger, and more particularly to a partition plate for a plate heat exchanger and a method for manufacturing a partition plate. The partition plate has a three-layer composite structure.

Referring to FIGS. 1a and 1b, the plate heat exchanger 8 is mainly used for the heat exchange of the fluid 84 to the fluid 85. The plate heat exchanger 8 includes a bottom plate 81, a cover plate 82, and a plurality of isolation plates 83. In this type of plate heat exchanger 8, because the heat transfer effect of the fluid flowing along the surface of the isolation plate 83 is poor, a corrugated structure 831 is usually added to the isolation plate 83, so that the two fluids 84 and 85 ripple on the isolation plate 83. A helical movement is made around the structure 831 to enhance the heat transfer effect.

Referring to FIG. 2, a Taiwan patent (Certificate No. M525434) discloses a plate heat exchanger, which includes a bottom plate 91, a cover plate 92, and a multilayer plywood 93. The cover plate 92 is provided with a first fluid inlet 921, a first fluid outlet 922, a second fluid inlet 923, and a second fluid outlet 924. The multilayer plywood 93 is disposed between the bottom plate 91 and the cover plate 92, and its connection mode is matched with the brazing filler material in a brazing process, and a first flow channel and a second flow channel are formed in the multilayer plywood. Neither the first flow channel nor the second flow channel can communicate with each other, and two independent fluids can be used for heat exchange. The bottom plate, cover plate and multilayer plywood are all stainless steel.

At present, plate heat exchangers used in the energy, water resources and petrochemical industries require good corrosion resistance. Therefore, titanium or nickel-based alloys are often used as separator materials, but their manufacturing difficulties are as follows: Nickel-based alloy material has good corrosion resistance, but its formability is worse than that of general stainless steel. Therefore, when forming a corrugated structure on a separator, it is easy to crack at the bend. Grains, and even cracks, which increases the scrap rate of materials. Second, titanium or nickel-based alloy materials have low thermal conductivity, so the plate heat exchanger has poor heat transfer and exchange efficiency.

In addition, the assembly of plate or plate heat exchangers based on titanium or nickel-based alloys is mainly based on the welding and assembling of isolation plates using brazing. The manufacturing difficulties are as follows: When using powdered solder powder, the solder powder and the adhesive Spray coating is performed after mixing, but it is difficult to apply the solder powder mixed with the binder to a uniform concentration. Therefore, in order to ensure a strong solder, a larger amount of solder is used, which will increase the manufacturing cost.

In view of this, there is a need to provide a plate heat exchanger to solve the aforementioned problems.

The main object of the present invention is to provide a partition plate for a plate heat exchanger, which has a three-layer composite structure.

In order to achieve the above object, the present invention provides an isolation plate for a plate heat exchanger. The isolation plate includes: a metal plate for corrosion resistance; a metal plate for heat conduction; and a metal plate for welding; wherein the metal plate for corrosion resistance, The metal plate for heat conduction and the metal plate for welding are joined into a three-layer composite structure isolation plate according to a predetermined sequence, and the isolation plate is formed into an isolation plate having a specific cross section.

The isolation plate of the present invention is formed by combining a highly corrosion-resistant metal plate (such as titanium or a nickel-based alloy) with a highly thermally conductive metal plate (such as copper or a copper alloy) and a welding metal plate in a composite manner, and the advantages are summarized as follows: : First, use a highly thermally conductive material (such as copper or copper alloy) as the intermediate layer. Because the copper material has good ductility, it can avoid cracking of the material at the bend when the insulation plate is formed, and improve the insulation material yield. Second, a high thermal conductivity material (such as copper or copper alloy) as an intermediate layer can also improve the heat transfer performance of the isolation plate, so that the overall plate heat exchanger can improve the heat conversion efficiency. Third, since the metal sheet for welding of the present invention can be Instead of powdery solder powder, the isolation plate of the present invention does not need to be additionally coated with solder during brazing, so it can avoid the problem of soldering failure caused by uneven soldering, and can accurately control the amount of solder used, making its production efficiency improve.

In order to make the above and other objects, features, and advantages of the present invention more obvious, the following description will be described in detail with reference to the accompanying drawings.

1a‧‧‧ plate heat exchanger

1b‧‧‧ plate heat exchanger

11‧‧‧ floor

12‧‧‧ Cover

13‧‧‧Isolation board

13a‧‧‧The first isolation plate

13b‧‧‧Second insulation board

130‧‧‧specific profile

131‧‧‧Corrosion-resistant metal sheet

132‧‧‧ metal sheet for heat conduction

133‧‧‧ Welding sheet metal

133a‧‧‧Metal sheet for welding

133b‧‧‧Metal sheet for welding

8‧‧‧ plate heat exchanger

81‧‧‧ floor

82‧‧‧ Cover

83‧‧‧Isolation board

831‧‧‧Corrugated structure

84‧‧‧ fluid

85‧‧‧ fluid

91‧‧‧ floor

92‧‧‧ Cover

921‧‧‧First fluid inlet

922‧‧‧First fluid outlet

923‧‧‧Second fluid inlet

924‧‧‧Second fluid outlet

93‧‧‧Multi-layer plywood

Figures 1a and 1b are three-dimensional exploded and assembled schematic diagrams of a conventional plate heat exchanger; Figure 2 is a schematic sectional view of another conventional plate heat exchanger; and Figure 3 is a first embodiment of the present invention for a plate heat exchanger 4 and 5 are schematic cross-sectional views of a method for manufacturing an isolation plate of the present invention; FIG. 6 is a schematic cross-sectional view of a plate heat exchanger according to a first embodiment of the present invention; and FIG. 7 is a second view of the present invention. A schematic cross-sectional view of an isolation plate for a plate heat exchanger according to an embodiment; and FIG. 8 is a schematic cross-sectional view of a plate heat exchanger according to a second embodiment of the present invention.

Please refer to FIG. 3, which shows a plurality of partition plates 13 for a plate heat exchanger according to a first embodiment of the present invention. Each of the isolation plates 13 includes a metal plate 131 for corrosion resistance, a metal plate 132 for heat conduction, and a metal plate 133 for welding. The metal plate 131 for corrosion resistance, the metal plate 132 for heat conduction, and the metal plate 133 for welding are joined into a three-layer composite structure according to a predetermined sequence. The isolation plate 13 is formed as an isolation plate 13 having a specific cross section 130. The specific section 130 refers to the corrugated structure 831 on the isolating plate 83 shown in FIG. 1a, and the fluids 84 and 85 can be spirally moved near the corrugated structure 831 of the isolating plate 83 to enhance the heat transfer effect. The pattern of the corrugated structure 831 is only for illustration, and the corrugated structure of the present invention is not limited to that shown in FIG. 1a.

In this embodiment, the predetermined sequence is that the corrosion-resistant metal plate 131, the heat-conductive metal plate 132, and the welding metal plate 133 are sequentially joined, that is, the heat-conductive metal plate 132 is stacked on the corrosion-resistant metal plate Between 131 and the metal plate 133 for welding. The corrosion-resistant metal plate 131 may be a titanium or nickel-based alloy material. The metal plate 132 for heat conduction may be a copper metal or a copper alloy material. The metal plate 133 for welding is a welding material used for brazing between the metal plate 131 for corrosion resistance and the metal plate 132 for heat conduction, such as a copper alloy material, and the copper alloy material can be selected as BCuP-3, BCuP-4 And other copper alloy solder.

The manufacturing method of the insulation plate of the present invention includes: providing a metal plate 131 for corrosion resistance, a metal plate 132 for heat conduction, and a metal plate 133 for welding (as shown in FIG. 4); the metal plate 131 for corrosion resistance, and the metal for heat conduction The plate 132 and the welding metal plate 133 are joined into a three-layer composite structure isolation plate (as shown in FIG. 5) according to a predetermined sequence; and the insulation plate is formed into an insulation plate 13 having a specific cross-section 130 (as shown in FIG. 3).示). For example, in a roll bonding process, the corrosion-resistant metal plate, the heat-conducting metal plate, and the welding metal plate are joined into a three-layer composite structure isolation plate according to the predetermined sequence; and a metal A sheet metal forming process is used to form the insulation plate into a insulation plate with a specific cross-section. The rolling composite process refers to a plastic processing method, in which a plurality of work pieces (such as a multilayer metal sheet) are placed between two work rolls and rolled, so that the thickness of the plurality of work pieces is reduced or the cross-sectional area is reduced. And produce a joint. The sheet metal forming process can be selected as, but not limited to, a stamping process. The stamping process refers to a cold stamping process. Or the power of the special punching equipment to hit the work piece (such as the multi-layer metal sheet after joining), and shape it into the finished product shape and size specified by the mold. In addition, the sheet metal forming process can be selected as a bending process. The bending process uses a conventional or special bending equipment to form a V-shape or U-shape along a straight axis of a metal plate. The partition plate is formed as a partition plate having a specific cross section.

Referring to FIG. 6, there is shown a plate heat exchanger 1a according to a first embodiment of the present invention. The plate heat exchanger 1 a includes a bottom plate 11, a cover plate 12, and a plurality of isolation plates 13. The isolation plates 13 are stacked and joined between the cover plate 12 and the bottom plate 11. For example, the isolation plates 13 are stacked and bonded between the cover plate and the bottom plate by a brazing process. The brazing process refers to a welding method that heats the solder added between two work pieces (such as two metal plates) to be connected above the melting point of the solder, so that the solder has sufficient fluidity, and is fully filled in by capillary action. Between the two work pieces (called infiltration), and after the solder solidifies, the two work pieces are joined together, wherein the melting points of the solder are lower than the melting points of the two work pieces, respectively. According to the definition of the American Welding Society (AWS), a heating temperature higher than 450 ℃ is called brazing.

In the first embodiment, the isolation plate of the present invention is composed of a highly corrosion-resistant metal plate (such as titanium or a nickel-based alloy) and a highly thermally conductive metal plate (such as copper or a copper alloy) and a metal plate for welding (such as BCuP-3, BCuP- 4th grade copper alloys) are combined in a composite manner and then formed. The advantages are summarized as follows: First, the use of highly thermally conductive materials (such as copper or copper alloys) as the intermediate layer. Because copper materials have good ductility, they are used in insulation boards. During the forming process, the material can be prevented from cracking at the bending place, and the yield of the insulation board can be improved. Second, a high thermal conductivity material (such as copper or copper alloy) as an intermediate layer can also improve the heat transfer performance of the isolation plate, so that the overall plate heat exchanger can improve the heat conversion efficiency. Third, since the metal sheet for welding of the present invention can replace powdered solder powder, the isolation plate of the present invention does not need to be additionally coated with solder during brazing, so that the problem of welding failure caused by uneven solder can be avoided, and Can accurately control the amount of solder used to improve production efficiency.

Referring to FIG. 7, there is shown a plurality of partition plates for a plate heat exchanger according to a second embodiment of the present invention. The plurality of isolation plates of the second embodiment are substantially similar to the plurality of isolation plates of the first embodiment, wherein the same elements are denoted by the same reference numerals. The difference between the second and first embodiments is that the plurality of isolation plates of the second embodiment include a plurality of first and second isolation plates 13a, 13b. The predetermined sequence of the three-layer composite structure of the first isolation plate 13a is a metal plate 131 for corrosion resistance, a metal plate 132 for heat conduction, and a metal plate 133a for welding. The metal plate 133a for welding of the first isolation plate 13a is used as a welding material for the brazing between the metal plate 132 for heat conduction and the metal plate 132 for heat conduction, such as a nickel-based alloy material. The predetermined sequence of the three-layer composite structure of the second isolation plate 13b is a metal plate 132 for heat conduction, a metal plate 131 for corrosion resistance, and a metal plate 133b for welding. The metal plate 133b for welding of the second insulation plate 13b is a welding material used for brazing between the metal plate 131 for corrosion resistance and the metal plate 131 for corrosion resistance, such as a nickel-based alloy material. The aforementioned nickel-based alloy materials can be further selected as the welding materials of the series BNi-6, BNi-7.

Referring to Fig. 8, there is shown a plate heat exchanger 1b according to a second embodiment of the present invention. The plate heat exchanger 1b includes a bottom plate 11, a cover plate 12, and a plurality of isolation plates. The isolation plates include a plurality of first and second isolation plates 13a, 13b. The first and second isolation plates 13 a and 13 b are alternately stacked and joined between the cover plate 12 and the bottom plate 11. For example, the first and second isolation plates 13 a and 13 b are staggered and joined between the cover plate 12 and the bottom plate 11 by a brazing process.

In the second embodiment, the isolation plate of the present invention is composed of a highly corrosion-resistant metal plate (such as titanium or a nickel-based alloy), a highly thermally conductive metal plate (copper or a copper alloy), and a welding metal plate (a nickel-based alloy material) in a composite manner. After joining, it can be formed. The advantages are summarized as follows: First, using a high thermal conductivity material (copper or copper alloy) as the middle layer or outer layer. Because the copper material has good ductility, the material can be avoided from bending when the insulation plate is formed. Cracking everywhere, improve the yield of insulation board. Second, high thermal conductivity material (copper or copper alloy) as the middle layer or outer layer can also improve the isolation The heat transfer performance of the plate can improve the heat conversion efficiency of the overall plate heat exchanger. Third, since the metal sheet for welding of the present invention can replace powdered solder powder, the isolation plate of the present invention does not need to be additionally coated with solder during brazing, so that the problem of welding failure caused by uneven solder can be avoided, and Can accurately control the amount of solder used to improve production efficiency. Fourth, if the fluid is corrosive, the corrosive fluid can be passed through the passage formed by the corrosion-resistant metal plates of the two isolation plates, so as to increase the life of the plate heat exchanger.

In summary, it only describes the implementation or examples of the technical means adopted by the present invention to solve the problem, and is not intended to limit the scope of patent implementation of the present invention. That is, all changes and modifications that are consistent with the meaning of the scope of patent application of the present invention, or made according to the scope of patent of the present invention, are covered by the scope of patent of the present invention.

Claims (10)

An isolation plate for a plate heat exchanger includes: a metal plate for corrosion resistance; a metal plate for heat conduction; and a metal plate for welding; wherein the metal plate for corrosion resistance, the metal plate for heat conduction and the metal plate for welding An insulation board that is bonded into a three-layer composite structure according to a predetermined sequence, and the insulation board is formed into an insulation board with a specific cross-section; and the predetermined sequence is the metal plate for corrosion resistance, the metal plate for heat conduction, and the metal for welding The plates are spliced in order. The isolation plate for a plate heat exchanger according to item 1 of the scope of the patent application, wherein the corrosion-resistant metal plate is titanium or a nickel-based alloy material. The isolation plate for a plate heat exchanger according to item 1 of the scope of the patent application, wherein the metal plate for heat conduction is a copper metal or a copper alloy material. The isolation plate for a plate heat exchanger according to item 1 of the scope of the patent application, wherein the metal plate for welding is a copper alloy material. The isolation plate for a plate heat exchanger according to item 1 of the scope of the patent application, wherein the metal plate for welding is a nickel-based alloy material. A plate heat exchanger includes: a cover plate; a bottom plate; and a plurality of first isolation plates stacked and joined between the cover plate and the bottom plate, wherein the first isolation plate includes: a metal plate for corrosion resistance; A metal plate for heat conduction; and a metal plate for welding; wherein the corrosion-resistant metal plate, the heat conduction metal plate, and the welding metal plate of the first insulation plate are joined into a three-layer composite structure according to a first predetermined sequence; A partition plate, and the second partition plate is formed as a partition plate with a specific cross-section; and the first predetermined sequence is that the metal plate for corrosion resistance, the metal plate for heat conduction, and the metal plate for welding are sequentially joined. The plate heat exchanger according to item 6 of the scope of patent application, further comprising a plurality of second insulation plates, which are stacked and joined between the cover plate and the bottom plate, wherein the second insulation plate includes: a metal plate for corrosion resistance A metal plate for heat conduction; and a metal plate for welding; wherein the corrosion-resistant metal plate, the heat conduction metal plate, and the welding metal plate of the second insulation plate are joined into a three-layer composite according to a second predetermined sequence; Structured isolating plate, and the second isolating plate is formed as an isolating plate with a specific cross-section; and the second predetermined sequence is that the metal plate for heat conduction, the metal plate for corrosion resistance, and the metal plate for welding are sequentially joined. The plate heat exchanger according to item 7 of the scope of patent application, wherein the first and second partition plates are staggered and joined between the cover plate and the bottom plate. A method for manufacturing an isolation plate includes: providing a metal plate for corrosion resistance, a metal plate for heat conduction, and a metal plate for welding; and joining the metal plate for corrosion resistance, the metal plate for heat conduction, and the metal plate for welding according to a predetermined sequence It is a three-layer composite structure insulation board, wherein the predetermined sequence is that the corrosion-resistant metal plate, the heat-conducting metal plate, and the welding metal plate are sequentially joined; and the insulation plate is formed into an insulation plate with a specific cross-section. The method for manufacturing an isolation panel as described in item 9 of the scope of the patent application, wherein the rolling-resistant composite process is used to join the metal sheet for corrosion resistance, the metal sheet for heat conduction and the metal sheet for welding into three layers according to the predetermined sequence A composite structure isolation plate; and a metal plate forming process to form the isolation plate into an isolation plate with a specific cross-section.