Condenser and plate heat exchanger

Abstract

According to the condenser and the plate heat exchanger, in the condenser, a refrigerant inlet pipeline and a refrigerant outlet pipeline are arranged in parallel and opposite in direction, the two ends of a condensation plate are connected with the refrigerant inlet pipeline and the refrigerant outlet pipeline respectively, and the condensation plate is perpendicular to the refrigerant inlet pipeline or the refrigerant outlet pipeline. The acid-base-containing or hydrogen fluoride material inlet pipeline is located on the outer side of the refrigerant inlet pipeline, the acid-base-containing or hydrogen fluoride material outlet pipeline is located on the outer side of the refrigerant outlet pipeline, the condensate outlet pipeline is located at the bottom of the condenser, and the air inlet end cover plate and the air outlet end cover plate are oppositely arranged on the outer side of the condensation plate and are parallel to the condensation plate. The condenser is simple in structure, good in heat exchange effect, capable of being applied to a large temperature range and suitable for industrial scenes resistant to acid, alkali and hydrogen fluoride corrosion.

Description

Technical Field

[0001] The utility model relates to the field of new energy, and in particular to a device for recovering electrolyte solvent of waste lithium-ion batteries. Background Art

[0002] Fluorine chemical industry is a huge industry. Except for a few inorganic products (such as lithium fluoride, sodium fluoride, and calcium fluoride), most of them are organic substances, so they are also called organic fluorine chemicals, such as Freon, polyvinyl fluoride, fluorocarboxylic acid esters, etc. Among these fluorine industries, most are related to hydrogen fluoride. Some products use hydrogen fluoride as raw material, some products will produce hydrogen fluoride, some will produce hydrogen fluoride after combustion, and some will contain hydrogen fluoride in waste gas, etc. However, hydrogen fluoride is highly corrosive, especially in the presence of water, making silicon-containing materials such as ceramics basically ineffective. In addition, fluorine also has the characteristics of chemical coordination, and general metals cannot resist hydrogen fluoride corrosion for a long time.

[0003] Condensers used in organic fluorine chemical industry still use ordinary condensers, but most of them are shell and tube condensers with polytetrafluoroethylene as the main material, and fluorine-containing materials go through the tube. The biggest feature of these condensers is that the thermal conductivity of polytetrafluoroethylene is only 0.248w / m / k, while the thermal conductivity of stainless steel is 16.9w / m / k. The thermal conductivity of polytetrafluoroethylene is only 1 / 68 of that of stainless steel. If the equipment with the same heat exchange capacity under the same working conditions is made, the heat exchange area of ​​polytetrafluoroethylene must reach 68 times that of stainless steel to achieve the same heat exchange effect, which is unacceptable.

[0004] There are also graphite condensers on the market. Although graphite is a material with very good thermal conductivity, its thermal conductivity coefficient will be affected by factors such as the isotropy and temperature of the graphite. Generally speaking, the lower the crystal temperature of graphite and the higher the isotropy, the better the heat transfer performance. However, it is difficult to make graphite isotropic, so the thermal conductivity of graphite is uneven, and its thermal conductivity decreases with increasing temperature. At high temperatures, graphite even tends to be in adiabatic. Most condensers operate at high temperatures, which makes graphite condensers unstable, making it difficult to control the heat exchange of the fluid and it is difficult to accurately predict the outlet temperature of the material.

[0005] In addition, monel alloy is resistant to hydrogen fluoride corrosion for a long time, but this material is expensive and difficult to use on a large scale. Summary of the invention

[0006] In view of the shortcomings of the prior art described above, the purpose of the present invention is to provide a condenser and a plate heat exchanger comprising the same, which have a simple structure, good heat exchange effect, can be used in a larger temperature range, and are suitable for industrial scenarios that are resistant to acid, alkali and hydrogen fluoride corrosion.

[0007] The utility model provides a condenser, comprising: a refrigerant inlet pipe, a refrigerant outlet pipe, an inlet pipe for materials containing acid, alkali or hydrogen fluoride, an outlet pipe for materials containing acid, alkali or hydrogen fluoride, a condensate outlet pipe, an air inlet end cover plate, a condensation plate and an air outlet end cover plate, the refrigerant inlet pipe and the refrigerant outlet pipe are arranged in parallel and in opposite directions, the two ends of the condensation plate are respectively connected to the refrigerant inlet pipe and the refrigerant outlet pipe, the condensation plate and the refrigerant inlet pipe or the refrigerant outlet pipe are arranged vertically, the inlet pipe for materials containing acid, alkali or hydrogen fluoride is located on the outside of the refrigerant inlet pipe, the outlet pipe for materials containing acid, alkali or hydrogen fluoride is located on the outside of the refrigerant outlet pipe, the condensate outlet pipe is located at the bottom of the condenser, the air inlet end cover plate and the air outlet end cover plate are arranged opposite to each other, arranged on the outside of the condensation plate, and parallel to the condensation plate.

[0008] Furthermore, the refrigerant inlet pipe is provided with two or more first branch pipes, and the refrigerant outlet pipe is provided with two or more second branch pipes, and the number of the first branch pipes, the second branch pipes and the condensation plates corresponds one to one.

[0009] Furthermore, the air inlet cover plate or the air outlet cover plate is a box-shaped structure with one side open.

[0010] Furthermore, a first sealing ring groove is provided around the opening of the air inlet end cover plate, and a second sealing ring groove is provided around the opening of the air outlet end cover plate.

[0011] Furthermore, the air inlet cover plate or the air outlet cover plate is made of aluminum alloy, and a polytetrafluoroethylene material layer is provided on the inner surface.

[0012] Furthermore, third sealing ring grooves are provided on the four edges of the two side surfaces of the condensation plate for heat exchange.

[0013] Furthermore, a channel is provided at one end of the condensation plate.

[0014] Furthermore, the condenser includes two or more condensation plates, and two adjacent condensation plates are installed in opposite directions.

[0015] Furthermore, the inlet pipe for materials containing acid, alkali or hydrogen fluoride includes a third branch pipe, and both ends of the third branch pipe are respectively connected to the inlet pipe for materials containing acid, alkali or hydrogen fluoride and the air inlet end cover plate; the outlet pipe for materials containing acid, alkali or hydrogen fluoride includes a fourth branch pipe, and both ends of the fourth branch pipe are respectively connected to the outlet pipe for materials containing acid, alkali or hydrogen fluoride and the air outlet end cover plate.

[0016] Furthermore, the side of the air inlet cover plate or the air outlet cover plate also includes a vent, and the third branch pipe or the fourth branch pipe is connected to the acid, alkali or hydrogen fluoride material inlet pipe or the acid, alkali or hydrogen fluoride material outlet pipe respectively through the vent.

[0017] Furthermore, it also includes two cover plate reinforcement plates, which are located on the side of the air inlet end cover plate or the air outlet end cover plate away from the condensation plate.

[0018] The utility model also provides a plate heat exchanger, comprising a base, a shell and the condenser as described above, wherein the condenser is located in a cavity formed by the base and the shell.

[0019] In summary, the condenser of the utility model has a simple structure and is easy to install. Even if the condensing plate fails, it is only necessary to replace the failed condensing plate alone, and there is no need to replace the entire plate. The number of condensing plates can be increased according to actual conditions, which improves the heat exchange efficiency while reducing the space occupied. Adjacent condensing plates are installed in opposite directions, and the spacing between adjacent condensing plates is small, so that the total heat transfer coefficient is greatly improved, and the heat exchange efficiency is improved, so that the condenser can be used in the range of -200 to 250°C. Secondly, the refrigerant in the condensing plate is stably in the low temperature range, which improves the heat exchange efficiency. In addition, the utility model arranges the inlet pipe containing acid, alkali or hydrogen fluoride materials and the outlet pipe containing acid, alkali or hydrogen fluoride materials, so that the plate heat exchanger can resist both acid and alkali corrosion and hydrogen fluoride corrosion. The cover plate reinforcement plate enables the condenser to work both under normal pressure and under vacuum. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 The schematic diagram of the structure of the plate heat exchanger of the utility model is shown.

[0021] Figure 2 Shows Figure 1 Top view of the .

[0022] Figure 3 The schematic diagram of the structure of the condenser of the utility model is shown.

[0023] Figure 4 The schematic diagram of the structure of the condensation plate of the utility model is shown.

[0024] Figure 5 Shows Figure 4 A partial enlarged schematic diagram of the condensation plate in the middle.

[0025] Figure 6 The internal structure diagram of the air intake cover plate of the utility model is shown.

[0026] Figure 7 The internal structure diagram of the air outlet cover plate of the utility model is shown.

[0027] Component number description

[0028] 100-Plate Heat Exchanger

[0029] 01-Base

[0030] 02-Housing

[0031] 03-Condenser

[0032] 031-Refrigerant inlet pipe

[0033] 0311–First branch

[0034] 032-Refrigerant outlet pipeline

[0035] 0321–Second branch

[0036] 033-Inlet pipelines for materials containing acid, alkali or hydrogen fluoride

[0037] 0331–The third branch

[0038] 034-Export pipeline for materials containing acid, alkali or hydrogen fluoride

[0039] 0341–The fourth branch

[0040] 035-Condensate outlet pipe

[0041] 0351-Condensate outlet branch

[0042] 036-Intake cover

[0043] 037-Condensation plate

[0044] 0371–Handle

[0045] 0372-Strengthening connecting ribs

[0046] 0372-Channel

[0047] 038-Air outlet cover

[0048] 051-First sealing ring slot

[0049] 052-Second sealing ring slot

[0050] 053-Third sealing ring slot

[0051] 061-Air Inlet

[0052] 062-Vent

[0053] 09-Sealing ring

[0054] 10- Cover reinforcement plate

[0055] 11-Fixing screw DETAILED DESCRIPTION

[0056] The following is a description of the implementation of the present invention by means of specific embodiments. People familiar with the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0057] See also Figures 1 to 7It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings in this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the utility model, so they have no substantial technical significance. Any modification of the structure, change in the proportion relationship, or adjustment of the size should still fall within the scope of the technical content disclosed by the utility model without affecting the effects and purposes that can be achieved by the utility model. At the same time, the terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the utility model. The change or adjustment of their relative relationship should also be regarded as the scope of the implementation of the utility model without substantially changing the technical content.

[0058] Figure 1 The schematic diagram of the structure of the plate heat exchanger of the utility model is shown. Figure 2 Shows Figure 1 Top view of the . Figure 3 The schematic diagram of the structure of the condenser of the utility model is shown. Figure 4 The schematic diagram of the structure of the condensation plate of the utility model is shown. Figure 5 Shows Figure 4 A partial enlarged schematic diagram of the condensation plate in the middle. Figure 6 The internal structure diagram of the air intake cover plate of the utility model is shown. Figure 7 The internal structure diagram of the air outlet cover plate of the utility model is shown.

[0059] A plate heat exchanger 100 includes a base 01, a shell 02 and a condenser 03, wherein the condenser 03 is located in a cavity formed by the base 01 and the shell 02. The shell 02 includes a plurality of through holes, and a refrigerant inlet pipe 031 and a refrigerant outlet pipe 032, an acid-base or hydrogen fluoride material inlet pipe 033, and an acid-base or hydrogen fluoride material outlet pipe 034 of the condenser 03 extend from the shell 02 through the through holes respectively. The refrigerant inlet pipe 031 and the acid-base or hydrogen fluoride material inlet pipe 033 are located on the same side of the shell 02, and the refrigerant outlet pipe 032 and the acid-base or hydrogen fluoride material outlet pipe 034 are located on the other side of the shell 02.

[0060] In addition to the refrigerant inlet pipe 031, the refrigerant outlet pipe 032, the acid-base or hydrogen fluoride material inlet pipe 033, and the acid-base or hydrogen fluoride material outlet pipe 034, the condenser 03 also includes a condensate outlet pipe 035, an air inlet end cover plate 036, a condensation plate 037, and an air outlet end cover plate 038. The refrigerant inlet pipe 031 and the refrigerant outlet pipe 032 are arranged in parallel and in opposite directions. The two ends of the condensation plate 037 are respectively connected to the refrigerant inlet pipe 031 and the refrigerant outlet pipe 032, and the condensation plate 037 is arranged vertically to the refrigerant inlet pipe 031 or the refrigerant outlet pipe 032. The acid-base or hydrogen fluoride material inlet pipe 033 is located on the outside of the refrigerant outlet pipe 032, and the acid-base or hydrogen fluoride material outlet pipe 034 is located on the outside of the refrigerant inlet pipe 031. The condensate outlet pipe 035 is located at the bottom of the plate heat exchanger 100. The air inlet cover plate 036 and the air outlet cover plate 038 are arranged on the outer side of the condensation plate 037 , the two are arranged opposite to each other and parallel to the condensation plate 037 .

[0061] The refrigerant inlet pipe 031 is also provided with two or more first branch pipes 0311, and the refrigerant outlet pipe 032 is provided with two or more second branch pipes 0321. The first branch pipe 0311 and the second branch pipe 0321 are respectively located at the two ends of the condensation plate 037, and the number of the first branch pipes 0311, the second branch pipes 0321 and the condensation plate 037 corresponds to each other. The refrigerant is divided from the refrigerant inlet pipe 031 to the first branch pipe 0311, then enters the condensation plate 037 from the first branch pipe 0311, and then enters the refrigerant outlet pipe 031 through the second branch pipe 0321. The refrigerant inlet pipe 031 is made of polytetrafluoroethylene.

[0062] The air inlet cover plate 036 is a box-shaped structure with one side open, and a first sealing ring groove 051 is provided around the opening. The side of the air inlet cover plate 037 is provided with an air inlet port 061, and the air inlet port 061 is connected to the acid-base or hydrogen fluoride material inlet pipe 033. Preferably, the air inlet cover plate 036 is made of aluminum alloy, and a polytetrafluoroethylene material layer is provided on the surface of the part of the inner part that contacts the material.

[0063] The outlet cover plate 038 is a box-shaped structure with one side open, and a second sealing ring slot 052 is provided around the opening. A vent 062 is provided on the side of the outlet cover plate 038, and the vent 062 is connected to the acid-base or hydrogen fluoride material outlet pipe 034. A condensate outlet branch pipe 0351 is provided at the bottom of the outlet cover plate 038, and the condensate outlet branch pipe 0351 is connected to the condensate outlet pipe 05. Preferably, the outlet cover plate 038 is an aluminum alloy, and a polytetrafluoroethylene material layer is provided on the surface of the part of the inner part that contacts the material. The condensate flows into the condensate outlet branch pipe 0351 through the condensate outlet in the gap between the condensation plate 037 and the outlet cover plate 038, and then enters the condensate outlet pipe 07 from the condensate outlet branch pipe 0351. The condensate outlet pipe 05 is made of polytetrafluoroethylene as a whole.

[0064] The air inlet cover plate 036 or the air outlet cover plate 038 is connected to the condensation plate 037 through a sealing ring 09, and the sealing ring 09 is respectively arranged in the first sealing ring groove 051 or the second sealing ring groove 052. The sealing ring 09 helps to improve the sealing effect between the condensation plate 037 and the air inlet cover plate 036 or the air outlet cover plate 038. Preferably, the sealing ring 09 is made of polytetrafluoroethylene.

[0065] The condenser 03 includes two or more condensation plates 037, and two adjacent condensation plates 037 are connected by a sealing ring 09. A handle 0371 is provided on the top of the condensation plate 037. A reinforcing connecting rib 0372 is provided inside the condensation plate 037. The three sealing ring slots 053 are provided on the four sides of the two sides of the condensation plate 037 for heat exchange, and a narrow and long channel 0373 is provided at one end of the condensation plate 037. When two or more condensation plates 037 are combined for operation, the two adjacent condensation plates 037 are installed in opposite directions, that is, the channel 0373 of the first condensation plate 037 is on the left, and the channel 0373 of the next condensation plate 037 is on the right. After assembling a plurality of condensation plates 037, the condensate passes through the channels 0373 of the plurality of condensation plates 037 and the gaps between the adjacent condensation plates 037 from the air inlet end cover plate 036 in turn, and then flows out from the condensate outlet pipe 035 after passing through the air outlet end cover plate 038. The path of the condensate when passing through the condensation plate 037 is S-shaped.

[0066] Preferably, when two plate heat exchangers 100 are working in combination, two adjacent condensation plates 037 are connected via the sealing ring 09 and the third sealing ring groove 053 , thereby communicating the passages of the two condensate in the plate heat exchangers 100 .

[0067] In another embodiment, the plate heat exchanger 100 further includes two cover plate reinforcement plates 10, which are located on a side of the air inlet end cover plate 36 or the air outlet end cover plate 038 away from the condensation plate 037. Preferably, the cover plate reinforcement plate 10 is in a grid shape. The cover plate reinforcement plate 10 is connected to the air inlet end cover plate 036 or the air outlet end cover plate 037 by welding. The cover plate reinforcement plate 10 allows the condenser to be used in a vacuum environment, that is, when the inside of the condenser is in a vacuum state, the cover plate reinforcement plate 10 helps to prevent the condenser from being affected by the external atmospheric pressure.

[0068] The plate heat exchanger 100 further includes a fixing screw 11. The fixing screw 11 is parallel to the refrigerant inlet pipe 031 or the refrigerant outlet pipe 032 and is located below the refrigerant inlet pipe 031 or the refrigerant outlet pipe 031. The fixing screw 11 is used to compress the air inlet end cover plate 036, the condensation plate 037, the air outlet end cover plate 038 and the sealing ring 9, so that each gap in the plate heat exchanger 100 is in a sealed state. Preferably, two or more fixing screws 11 are respectively arranged below the refrigerant inlet pipe 031 or the refrigerant outlet pipe 032.

[0069] The acid-base or hydrogen fluoride material inlet pipeline 033 includes a third branch pipe 0331, and the two ends of the third branch pipe 0311 are respectively connected to the acid-base or hydrogen fluoride material inlet pipeline 031 and the air inlet end cover plate 36. The acid-base or hydrogen fluoride material outlet pipeline 034 includes a fourth branch pipe 0341, and the two ends of the fourth branch pipe 0341 are respectively connected to the acid-base or hydrogen fluoride material outlet pipeline 032 and the air outlet end cover plate 038. The acid-base or hydrogen fluoride material enters the air inlet end cover plate 038 from the acid-base or hydrogen fluoride material inlet pipeline 031 and the third branch pipe 0311 in sequence, and the acid-base or hydrogen fluoride material passes through the channels 0373 of the plurality of condensation plates 037 and the gaps between the adjacent condensation plates 037 from the air inlet end cover plate 036 in sequence, and then enters the acid-base or hydrogen fluoride material outlet pipeline 034 through the air outlet end cover plate 038 and the fourth branch pipe 0341 and flows out. At this time, the path of the acid, alkali or hydrogen fluoride-containing material when passing through the condensation plate 037 is S-shaped.

[0070] Two or more third branches 0331 are arranged on the acid-base or hydrogen fluoride material inlet pipe 033, and two or more fourth branches 0341 are arranged on the acid-base or hydrogen fluoride material outlet pipe 034. The acid-base or hydrogen fluoride material inlet pipe 033 or the acid-base or hydrogen fluoride material outlet pipe 034 is made of polytetrafluoroethylene.

[0071] In the utility model, the condenser has a simple structure, is easy to install, has a high thermal conductivity of the condensing plate, and has a good heat transfer effect. Adjacent condensing plates are installed in opposite directions, and the spacing between adjacent condensing plates is small, which greatly improves the total heat transfer coefficient and the heat exchange efficiency, so that the condenser can be used in the range of -200 to 250°C. Secondly, the refrigerant in the condensing plate is stably in the low temperature range, which improves the heat exchange efficiency.

[0072] In the utility model, when any component of the plate heat exchanger fails, especially when the condensing plate fails, only the failed condensing plate needs to be replaced separately, and the entire plate does not need to be replaced. In addition, the number of condensing plates can be increased according to actual conditions, thereby improving the heat exchange efficiency while reducing the occupied space. The utility model arranges an inlet pipe for materials containing acid, alkali or hydrogen fluoride and an outlet pipe for materials containing acid, alkali or hydrogen fluoride, so that the plate heat exchanger can resist both acid and alkali corrosion and hydrogen fluoride corrosion. The cover plate reinforcement plate allows the condenser to work both under normal pressure and under vacuum.

[0073] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by a person of ordinary skill in the art without departing from the spirit and technical concept disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. A condenser, characterized in that: include: A refrigerant inlet pipe, a refrigerant outlet pipe, an inlet pipe for materials containing acid, alkali or hydrogen fluoride, an outlet pipe for materials containing acid, alkali or hydrogen fluoride, a condensate outlet pipe, an air inlet cover plate, a condensation plate and an air outlet cover plate. The refrigerant inlet pipe and the refrigerant outlet pipe are arranged in parallel and in opposite directions. The two ends of the condensation plate are respectively connected to the refrigerant inlet pipe and the refrigerant outlet pipe. The condensation plate is arranged vertically to the refrigerant inlet pipe or the refrigerant outlet pipe. The inlet pipe for materials containing acid, alkali or hydrogen fluoride is located on the outside of the refrigerant inlet pipe, the outlet pipe for materials containing acid, alkali or hydrogen fluoride is located on the outside of the refrigerant outlet pipe, and the condensate outlet pipe is located at the bottom of the condenser. The air inlet cover plate and the air outlet cover plate are arranged opposite to each other, on the outside of the condensation plate, and parallel to the condensation plate.

2. The condenser according to claim 1, characterized in that The refrigerant inlet pipe is also provided with two or more first branch pipes, and the refrigerant outlet pipe is provided with two or more second branch pipes, and the number of the first branch pipes, the second branch pipes and the condensation plates corresponds one to one.

3. The condenser according to claim 1, characterized in that The air inlet cover plate or the air outlet cover plate is a box-shaped structure with one side open.

4. The condenser according to claim 1, characterized in that A first sealing ring groove is arranged around the opening of the air inlet cover plate, and a second sealing ring groove is arranged around the opening of the air outlet cover plate.

5. The condenser according to claim 1, characterized in that The air inlet cover plate or the air outlet cover plate is made of aluminum alloy, and a polytetrafluoroethylene material layer is provided on the inner surface.

6. The condenser according to claim 1, characterized in that The third sealing ring grooves are arranged on the four edges of the two side surfaces of the condensing plate used for heat exchange.

7. The condenser according to claim 1, characterized in that One end of the condensation plate is provided with a channel.

8. The condenser according to claim 1, characterized in that The condenser comprises two or more condensation plates, and two adjacent condensation plates are installed in opposite directions.

9. The condenser according to claim 1, characterized in that The acid-base or hydrogen fluoride material inlet pipeline includes a third branch pipe, and the two ends of the third branch pipe are respectively connected to the acid-base or hydrogen fluoride material inlet pipeline and the air inlet end cover plate; the acid-base or hydrogen fluoride material outlet pipeline includes a fourth branch pipe, and the two ends of the fourth branch pipe are respectively connected to the acid-base or hydrogen fluoride material outlet pipeline and the air outlet end cover plate.

10. The condenser according to claim 9, characterized in that The side of the air inlet cover plate or the air outlet cover plate also includes a vent, and the third branch pipe or the fourth branch pipe is connected to the acid, alkali or hydrogen fluoride material inlet pipeline or the acid, alkali or hydrogen fluoride material outlet pipeline respectively through the vent.

11. The condenser according to claim 1, characterized in that It also includes two cover plate reinforcement plates, which are located on a side of the air inlet end cover plate or the air outlet end cover plate away from the condensation plate.

12. A plate heat exchanger, characterized in that: The invention comprises a base, a shell and a condenser as claimed in any one of claims 1 to 11, wherein the condenser is located in a cavity formed by the base and the shell.

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