Liquid-liquid plate type separation heat pipe heat exchanger

Abstract

The invention provides a liquid-liquid plate type separation heat pipe heat exchanger, and relates to the field of heat exchanger equipment, the liquid-liquid plate type separation heat pipe heat exchanger comprises a shell and a heat exchange assembly fixed on the shell, the heat exchange assembly comprises an evaporation plate type heat exchanger and a condensation plate type heat exchanger, and the heat exchange assembly further comprises an ascending pipe and a descending pipe which are communicated with the evaporation plate type heat exchanger and the condensation plate type heat exchanger; the condensation plate heat exchanger is located above the evaporation plate heat exchanger, an evaporation end heat pipe working medium inlet and a high-temperature liquid outlet are formed in the bottom of the evaporation plate heat exchanger, the evaporation end heat pipe working medium outlet is connected with the condensation end heat pipe working medium inlet through an ascending pipe, and the evaporation end heat pipe working medium inlet is connected with the condensation end heat pipe working medium outlet through a descending pipe. The high-temperature liquid inlet and the high-temperature liquid outlet are connected through the high-temperature liquid flow channel from top to bottom, the low-temperature liquid inlet and the low-temperature liquid outlet are connected through the low-temperature liquid flow channel from bottom to top, and the heat exchange efficiency of the heat exchanger can be greatly improved.

Description

Technical Field

[0001] The invention relates to the technical field of heat pipe heat exchangers, and in particular to a liquid-liquid plate separation heat pipe heat exchanger. Background Art

[0002] Currently, many engineering backgrounds require cooling of high-temperature liquids, and plate heat exchangers are used to cool high-temperature liquids. However, the heat dissipation capacity of traditional plate heat exchangers depends on the single-phase heat transfer capacity, flow rate and temperature difference of the fluid. Therefore, although traditional plate heat exchangers have the characteristics of compact and lightweight structure, they are still large in size to cool high-temperature liquids in large-scale projects (such as cooling the compressor lubricating oil in the air compressor room of a power plant), and they take up a lot of space.

[0003] The Chinese invention patent with the authorization number CN104101228A provides a gaseous medium liquid-liquid heat exchanger. Based on the principle of limited solubility of gas in liquid, a gas that is insoluble or poorly soluble in two liquids is forced to generate pressure in the gas flow channel by a fan to push the gas through liquid A and liquid B respectively, and the gas and liquid are in mixed contact. A gas distribution plate is provided at the end of the gas flow channel that is introduced into the liquid to facilitate rich and uniform contact between the gas and the liquid. The gas absorbs or releases heat in liquid A. After the absorption or release of heat is completed, liquid B is introduced to release or absorb heat to achieve the purpose of transferring heat from one liquid to another. After the gas medium passes through the two liquids and undergoes heat exchange, it re-enters the inlet of the fan to realize the recycling of the gas medium. According to the temperature requirements of the two fluids, the fan speed is changed to adjust the flow rate of the gas medium.

[0004] However, the gaseous medium liquid-liquid heat exchanger provided by the above patent has the problems of low heat exchange efficiency and excessive space when working with large quantities of liquid heat exchange, so it is necessary to provide a solution to improve this problem. Summary of the invention

[0005] The object of the present invention is to provide a liquid-liquid plate separation heat pipe heat exchanger, which utilizes the principle that a large amount of heat can be transferred when the heat pipe working medium undergoes phase change, thereby greatly improving the heat exchange efficiency of the heat exchanger and taking up a small space.

[0006] The object of the present invention is to provide a liquid-liquid plate separation heat pipe heat exchanger, comprising a shell and a heat exchange component fixed on the shell, the heat exchange component comprising an evaporating plate heat exchanger, a condensing plate heat exchanger, and also comprising an ascending pipe and a descending pipe connecting the evaporating plate heat exchanger and the condensing plate heat exchanger, the condensing plate heat exchanger is located above the evaporating plate heat exchanger, the condensing plate heat exchanger is slightly smaller than the evaporating plate heat exchanger, a high-temperature liquid flow channel and an evaporating-end heat pipe working medium flow channel are arranged inside the evaporating plate heat exchanger, an evaporating-end heat pipe working medium inlet and a high-temperature liquid outlet are arranged at the bottom of the evaporating plate heat exchanger, an evaporating-end heat pipe working medium outlet and a high-temperature liquid inlet are arranged at the top of the evaporating plate heat exchanger, and a condensing-end heat pipe working medium flow channel is arranged inside the condensing plate heat exchanger and a low-temperature liquid flow channel, the bottom of the condensing plate heat exchanger is provided with a condensing end heat pipe working medium outlet and a low-temperature liquid inlet, the top of the condensing plate heat exchanger is provided with a condensing end heat pipe working medium inlet and a low-temperature liquid outlet, the high-temperature liquid inlet is connected with the high-temperature liquid outlet through a high-temperature liquid flow channel, the evaporation end heat pipe working medium inlet is connected with the evaporation end heat pipe working medium outlet through the evaporation end heat pipe working medium flow channel, the condensation end heat pipe working medium inlet is connected with the condensation end heat pipe working medium outlet through the condensation end heat pipe working medium flow channel, the low-temperature liquid inlet is connected with the low-temperature liquid outlet through the low-temperature liquid flow channel, the evaporation end heat pipe working medium outlet is connected with the condensation end heat pipe working medium inlet through a riser, and the evaporation end heat pipe working medium inlet is connected with the condensation end heat pipe working medium outlet through a downcomer.

[0007] By adopting the above technical scheme, the high-temperature liquid that needs to be cooled can be efficiently cooled by the evaporative plate heat exchanger. During the heat exchange process of the evaporative plate heat exchanger, the high-temperature liquid dissipates heat to the heat pipe working fluid inside the evaporative plate heat exchanger, and the heat pipe working fluid absorbs heat and vaporizes to form a gaseous heat pipe working fluid. The vaporization process of the heat pipe working fluid absorbs a large amount of heat from the high-temperature liquid, and efficiently cools the high-temperature liquid. The pressure of the vaporized gaseous heat pipe working fluid increases, and driven by the upper and lower pressure differences, it flows upward through the riser to the condensing plate heat exchanger to dissipate heat to the low-temperature liquid in the condensing plate heat exchanger. In the heat exchange process of the condensing plate heat exchanger, the gaseous heat pipe working fluid condenses into liquid, and flows back to the evaporative plate heat exchanger through the downcomer under the action of gravity to participate in the next heat exchange cycle. During the entire heat exchange cycle, the heat pipe working fluid undergoes two phase changes from liquid to gas and then to liquid, and can absorb a large amount of heat from the high-temperature liquid and transfer it to the low-temperature liquid, thereby improving the heat transfer performance of the high-temperature liquid to the low-temperature liquid, and achieving efficient cooling of the high-temperature liquid.

[0008] Optionally, the high-temperature liquid flow channel, the evaporation-end heat pipe working medium flow channel, the condensation-end heat pipe working medium flow channel, and the low-temperature liquid flow channel are all mutually disconnected flow channels formed by a plurality of compatible plates.

[0009] By adopting the above technical solution, the flow channel can be quickly built with low cost, and the flow channel composed of multiple plates can improve the heat exchange efficiency.

[0010] Optionally, a liquid filling hole is provided on the downcomer.

[0011] With the above solution, the liquid filling hole is used to fill the heat pipe working fluid, and the liquid filling rate of the heat pipe is adjusted according to the needs of the actual application scenario.

[0012] Optionally, a liquid storage tank is provided at the bottom end of the downcomer, and the liquid storage tank is connected to the downcomer as a part of the downcomer pipeline, and the tank body diameter of the liquid storage tank is larger than the inlet and outlet diameters of the downcomer.

[0013] By adopting the above technical solution, part of the heat pipe working fluid can be stored in the liquid storage tank, and the heat pipe working fluid can be continuously replenished to enter the heat pipe working fluid flow channel at the evaporation end, thereby avoiding dry burning of the evaporating plate heat exchanger and ensuring the normal operation of the entire heat pipe heat exchanger.

[0014] Optionally, the shell is composed of a connecting plate, a top plate, a bottom plate, and side panels by riveting.

[0015] By adopting the above technical solution, a shell can be assembled at low cost to protect the heat exchanger.

[0016] Optionally, a small square riding card and a large square riding card are fixed on the connecting plate, and the large square riding card and the connecting plate form a square groove for fixing the evaporating plate heat exchanger, and the small square riding card and the connecting plate form a groove for fixing the condensing plate heat exchanger.

[0017] By adopting the above technical solution, the evaporating plate heat exchanger and the condensing plate heat exchanger can be quickly fixed on the shell.

[0018] Optionally, the outside of the ascending pipe and the descending pipe is wrapped with thermal insulation material.

[0019] The above technical solution can avoid heat exchange between the heat pipe working fluid and the outside world when flowing through the riser and downcomer, ensuring that the heat exchange process is carried out at the evaporation end and the condensation end, reducing ineffective heat exchange and ensuring heat exchange efficiency.

[0020] Optionally, the riser is connected to the evaporator plate heat exchanger by welding, and the downcomer is connected to the condenser plate heat exchanger by welding, and the evaporator end heat pipe working fluid flow channel, the condenser end heat pipe working fluid flow channel, the riser and the downcomer form a closed channel.

[0021] The above technical solution can ensure that the heat pipe working fluid will not leak out during the heat exchange cycle, making the entire heat pipe heat exchanger safer and more reliable, and the operation process more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of a liquid-liquid plate separation heat pipe heat exchanger of the present invention.

[0023] Figure 2 This is a shell distribution diagram of a liquid-liquid plate separation heat pipe heat exchanger of the present invention.

[0024] Figure 3 The present invention is a schematic diagram of the heat exchange component structure of a liquid-liquid plate separation heat pipe heat exchanger.

[0025] Figure 4 It is a schematic diagram of the flow direction of the flow channel of a liquid-liquid plate separation heat pipe heat exchanger of the present invention.

[0026] Explanation of the reference numerals: 1. Shell; 11. Connecting plate; 12. Top plate; 13. Side panel; 14. Bottom plate; 2. Evaporating plate heat exchanger; 21. High-temperature liquid inlet; 22. High-temperature liquid outlet; 23. Evaporating-end heat pipe working fluid inlet; 24. Evaporating-end heat pipe working fluid outlet; 25. Large square riding card; 3. Condensing plate heat exchanger; 31. Low-temperature liquid inlet; 32. Low-temperature liquid outlet; 33. Condensing-end heat pipe working fluid inlet; 34. Condensing-end heat pipe working fluid outlet; 35. Small square riding card; 4. Rising pipe; 5. Downcomer; 51. Liquid filling hole; 52. Liquid storage tank. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Unless otherwise defined, the technical terms or scientific terms used herein should be understood by people with general skills in the field to which the present invention belongs. "Including" and similar words used in this article mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects.

[0028] The embodiment of the present invention provides a liquid-liquid plate separation heat pipe heat exchanger, comprising a shell 1, and a heat exchange component fixed on the shell 1, the heat exchange component comprising an evaporating plate heat exchanger 2, a condensing plate heat exchanger 3, and also comprising an ascending pipe 4 and a descending pipe 5 connecting the evaporating plate heat exchanger 2 and the condensing plate heat exchanger 3, the condensing plate heat exchanger 3 is located above the evaporating plate heat exchanger 2, the condensing plate heat exchanger 3 is slightly smaller than the evaporating plate heat exchanger 2, a high-temperature liquid flow channel and an evaporating-end heat pipe working medium flow channel are provided inside the evaporating plate heat exchanger 2, an evaporating-end heat pipe working medium inlet 23 and a high-temperature liquid outlet 22 are provided at the bottom of the evaporating plate heat exchanger 2, an evaporating-end heat pipe working medium outlet 24 and a high-temperature liquid inlet 21 are provided at the top of the evaporating plate heat exchanger 2, and a condensing-end heat pipe working medium flow channel and a low-temperature liquid flow channel are provided inside the condensing plate heat exchanger 3 The bottom of the condensing plate heat exchanger 3 is provided with a condensing end heat pipe working medium outlet 34 and a low-temperature liquid inlet 31, and the top of the condensing plate heat exchanger 3 is provided with a condensing end heat pipe working medium inlet 33 and a low-temperature liquid outlet 32, the high-temperature liquid inlet 21 is connected with the high-temperature liquid outlet 22 through a high-temperature liquid flow channel, the evaporation end heat pipe working medium inlet 23 is connected with the evaporation end heat pipe working medium outlet 24 through the evaporation end heat pipe working medium flow channel, the condensation end heat pipe working medium inlet 33 is connected with the condensation end heat pipe working medium outlet 34 through the condensation end heat pipe working medium flow channel, the low-temperature liquid inlet 31 is connected with the low-temperature liquid outlet 32 ​​through the low-temperature liquid flow channel, the evaporation end heat pipe working medium outlet 24 is connected with the condensation end heat pipe working medium inlet 33 through the riser 4, and the evaporation end heat pipe working medium inlet 23 is connected with the condensation end heat pipe working medium outlet 34 through the downcomer 5.

[0029] See also Figure 1 Figure 2 Figure 3In the heat exchange process, the high-temperature liquid flows from the high-temperature liquid inlet 21 to the high-temperature liquid outlet 22 through the high-temperature liquid flow channel in the evaporating plate heat exchanger 2, and the heat exchange medium flows from the evaporating end heat pipe medium inlet 23 to the evaporating end heat pipe medium outlet 24 through the evaporating end heat pipe medium flow channel in the evaporating plate heat exchanger 2. The high-temperature liquid dissipates heat to the heat exchange medium through the evaporating plate heat exchanger 2, and the heat exchange medium absorbs heat and vaporizes. Driven by the pressure difference, the gaseous heat exchange medium flows from the high-temperature liquid outlet through the riser 4 to the condensing end heat pipe medium inlet 33, and the low-temperature liquid flows through the condensing plate heat exchanger 2. The heat exchange medium flows from the low-temperature liquid inlet 31 to the low-temperature liquid outlet 32 ​​in the heat exchanger 3 through the low-temperature liquid flow channel. The heat exchange medium is guided from the condensing end heat pipe medium inlet 33 to the condensing end heat pipe medium outlet 34 in the condensing plate heat exchanger 3 through the condensing end heat pipe medium flow channel. The low-temperature liquid absorbs heat from the gaseous heat exchange medium in the condensing plate heat exchanger 3. The gaseous heat exchange medium releases heat and condenses into liquid heat exchange medium. The liquid heat exchange medium flows from the condensing end heat pipe medium outlet 34 to the evaporating end heat pipe medium inlet 23 through the downcomer 5 and enters the evaporating plate heat exchanger 2 to enter the next heat exchange cycle. During the entire heat exchange cycle, the heat pipe medium undergoes two phase changes from liquid to gas and then to liquid. It can absorb a large amount of heat from the high-temperature liquid and transfer it to the low-temperature liquid, thereby improving the heat transfer performance of the high-temperature liquid to the low-temperature liquid and achieving efficient cooling of the high-temperature liquid.

[0030] In some embodiments, the high-temperature liquid flow channel, the evaporation-end heat pipe working fluid flow channel, the condensation-end heat pipe working fluid flow channel, and the low-temperature liquid flow channel are all non-interconnected flow channels formed by a plurality of compatible plates.

[0031] See also Figure 4 , multiple compatible plates are connected together, and the barrels are connected through the holes on the multiple plates to form two unconnected flow channels, and heat exchange is carried out through the thermal conductivity of the plates.

[0032] In some embodiments, a liquid filling hole 51 is provided on the downcomer 5 .

[0033] In fact, the filling hole 51 can be connected to a vacuum device to evacuate the interior of the heat pipe heat exchanger and inject heat pipe working fluid. In addition, the heat pipe working fluid can be injected through the filling hole 51 to adjust the filling rate of the heat pipe according to actual needs.

[0034] In some embodiments, a liquid storage tank is provided at the bottom end of the downcomer 5 , and the liquid storage tank is connected to the downcomer 5 as a part of the pipeline of the downcomer 5 , and the tank body diameter of the liquid storage tank is larger than the inlet and outlet diameters of the downcomer 5 .

[0035] In fact, the liquid storage tank is used to store part of the liquid heat pipe working fluid, which can replenish the heat pipe working fluid in the heat pipe working fluid flow channel at the evaporation end in time, ensuring that there is always liquid heat pipe working fluid in the heat pipe working fluid flow channel at the evaporation end, avoiding dry burning of the evaporating plate heat exchanger 2, and ensuring the normal operation of the entire heat pipe heat exchanger.

[0036] In some embodiments, the housing 1 is composed of a connecting plate 11, a top plate 12, a bottom plate 14, and a side panel 13 which are riveted together.

[0037] In fact, during the installation process, the connecting plate 11, the top plate 12, the bottom plate 14 and the side plate 13 can be quickly fixed together by riveting.

[0038] In some embodiments, a small square riding clamp 35 and a large square riding clamp 25 are fixed on the connecting plate 11, and the large square riding clamp 25 and the connecting plate 11 form a square groove for fixing the evaporating plate heat exchanger 2, and the small square riding clamp 35 and the connecting plate 11 form a square groove for fixing the condensing plate heat exchanger 3.

[0039] In fact, the large square saddle clamp 25 can fix the evaporating plate heat exchanger 2 on the shell 11 by bolts, and the small square saddle clamp 35 can fix the condensing plate heat exchanger 3 on the shell 1 by bolts.

[0040] In some embodiments, the riser 4 and the downcomer 5 are wrapped with thermal insulation materials.

[0041] In fact, if there are no insulation measures on the outside of the riser 4 and the downcomer 5, when the heat pipe working fluid flows through the riser 4 and the downcomer 5, it will exchange heat with the outside in advance, resulting in ineffective heat exchange. Therefore, wrapping the outside of the riser 4 and the downcomer 5 with thermal insulation materials can ensure the heat exchange efficiency of the entire heat pipe heat exchanger.

[0042] In some embodiments, the riser 4 is connected to the evaporator plate heat exchanger 2 by welding, and the downcomer 5 is connected to the condenser plate heat exchanger 3 by welding, and the evaporator end heat pipe working fluid flow channel, the condenser end heat pipe working fluid flow channel, the riser 4 and the downcomer 5 form a closed channel.

[0043] In fact, by sealing the heat pipe working fluid in the channel inside the heat pipe heat exchanger, the heat pipe working fluid will not leak out during the flow process, so that the heat pipe heat exchanger maintains stable operation and also makes the entire heat pipe heat exchanger safer and more reliable.

[0044] Although the embodiments of the present invention are described in detail above, it is obvious to those skilled in the art that various modifications and variations can be made to these embodiments. However, it should be understood that such modifications and variations are within the scope and spirit of the present invention as described in the claims. Moreover, the present invention described herein may have other embodiments and may be implemented or realized in a variety of ways.

Claims

1. A liquid-liquid plate separation heat pipe heat exchanger, characterized in that: The invention comprises a shell and a heat exchange component fixed on the shell, wherein the heat exchange component comprises an evaporating plate heat exchanger, a condensing plate heat exchanger, and also comprises an ascending pipe and a descending pipe connecting the evaporating plate heat exchanger and the condensing plate heat exchanger, wherein the condensing plate heat exchanger is located above the evaporating plate heat exchanger, and the condensing plate heat exchanger is slightly smaller than the evaporating plate heat exchanger, wherein a high-temperature liquid flow channel and an evaporating end heat pipe working medium flow channel are arranged inside the evaporating plate heat exchanger, an evaporating end heat pipe working medium inlet and a high-temperature liquid outlet are arranged at the bottom of the evaporating plate heat exchanger, an evaporating end heat pipe working medium outlet and a high-temperature liquid inlet are arranged at the top of the evaporating plate heat exchanger, a condensing end heat pipe working medium flow channel and a low-temperature liquid flow channel are arranged inside the condensing plate heat exchanger, and the condensing plate The bottom of the plate heat exchanger is provided with a condensing end heat pipe working medium outlet and a low-temperature liquid inlet, and the top of the condensing plate heat exchanger is provided with a condensing end heat pipe working medium inlet and a low-temperature liquid outlet, the high-temperature liquid inlet is connected with the high-temperature liquid outlet through a high-temperature liquid flow channel, the evaporation end heat pipe working medium inlet is connected with the evaporation end heat pipe working medium outlet through the evaporation end heat pipe working medium flow channel, the condensation end heat pipe working medium inlet is connected with the condensation end heat pipe working medium outlet through the condensation end heat pipe working medium flow channel, the low-temperature liquid inlet is connected with the low-temperature liquid outlet through the low-temperature liquid flow channel, the evaporation end heat pipe working medium outlet is connected with the condensation end heat pipe working medium inlet through a riser, and the evaporation end heat pipe working medium inlet is connected with the condensation end heat pipe working medium outlet through a downcomer.

2. The liquid-liquid plate separation heat pipe heat exchanger according to claim 1, characterized in that: The high-temperature liquid flow channel, the working medium flow channel of the heat pipe at the evaporation end, the working medium flow channel of the heat pipe at the condensation end, and the low-temperature liquid flow channel are all mutually disconnected flow channels formed by a plurality of compatible plates.

3. The liquid-liquid plate separation heat pipe heat exchanger according to claim 2, characterized in that: The downcomer is provided with a liquid filling hole.

4. The liquid-liquid plate separation heat pipe heat exchanger according to claim 3, characterized in that: A liquid storage tank is provided at the bottom end of the downcomer. The liquid storage tank is connected to the downcomer as a part of the downcomer pipeline. The body diameter of the liquid storage tank is larger than the inlet and outlet diameters of the downcomer.

5. The liquid-liquid plate separation heat pipe heat exchanger according to claim 4, characterized in that: The shell is composed of a connecting plate, a top plate, a bottom plate and side panels in a riveted manner.

6. The liquid-liquid plate separation heat pipe heat exchanger according to claim 5, characterized in that: A large square riding card and a small square riding card are fixed on the connecting plate, and the large square riding card and the connecting plate form a square groove for fixing the evaporating plate heat exchanger, and the small square riding card and the connecting plate form a square groove for fixing the condensing plate heat exchanger.

7. The liquid-liquid plate separation heat pipe heat exchanger according to claim 6, characterized in that: The outside of the ascending pipe and the descending pipe is wrapped with thermal insulation materials.

8. The liquid-liquid plate separation heat pipe heat exchanger according to claim 7, characterized in that: The ascending tube is connected to the evaporating plate heat exchanger by welding, and the descending tube is connected to the condensing plate heat exchanger by welding. The working fluid flow channel of the heat pipe at the evaporating end, the working fluid flow channel of the heat pipe at the condensing end, the ascending tube and the descending tube form a closed channel.

Images