WO2021012936A1 - Plate heat exchanger having flow-dividing plate path - Google Patents
Plate heat exchanger having flow-dividing plate path Download PDFInfo
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- WO2021012936A1 WO2021012936A1 PCT/CN2020/100316 CN2020100316W WO2021012936A1 WO 2021012936 A1 WO2021012936 A1 WO 2021012936A1 CN 2020100316 W CN2020100316 W CN 2020100316W WO 2021012936 A1 WO2021012936 A1 WO 2021012936A1
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- heat exchange
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- exchange module
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/02—Header boxes; End plates
Definitions
- the invention relates to a plate heat exchange device, which is mainly applied to heat exchange devices with steam (especially oil-containing steam) on the plate side, such as a condensing device, an evaporation device and a fluid heating device.
- a plate heat exchange device which is mainly applied to heat exchange devices with steam (especially oil-containing steam) on the plate side, such as a condensing device, an evaporation device and a fluid heating device.
- the public number is The Chinese patent application of CN104132557A relates to "an intermediate drainage type high-efficiency condensation system. It implements intermediate drainage at the end of the front-stage heat exchanger. This measure accelerates the discharge of the liquid film, thereby increasing the heat transfer coefficient. And effective The utilization rate of the heat exchange surface of the heat exchanger is improved, and the front-stage heat exchanger is always in a high-efficiency heat exchange state. After use, it is found that although the intermediate drainage measure can have a certain effect in improving the heat exchange efficiency, it is due to its The method is to lead the condensate out of the heat exchanger, and this part of the extraction medium is generally a gas-liquid mixed phase, which still stores high heat energy. On the one hand, it will reduce the utilization rate of heat energy, and on the other hand, it will increase the operating load of the refrigeration system. .
- the technical problem to be solved by the present invention is to provide a plate-side split-flow plate heat exchanger, in which part of the liquid phase of the plate-side fluid, including oil, is concentrated and converged through an inlet header and then introduced into a separate auxiliary plate. Accelerate the discharge of liquid phase, greatly reduce the content of liquid phase and oil passing through the main heat exchange fins, thereby improving the overall heat exchange efficiency of the device.
- the plate-pass split-flow plate heat exchanger includes a shell and two or more heat exchange modules installed in the shell and arranged up and down.
- the heat exchange module includes several main heat exchange plates installed in parallel and a certain number of auxiliary heat exchanges. Plate, the medium inlet of the heat exchange plate is equipped with an inlet header, and the medium outlet is equipped with an outlet header.
- the inlet header is connected to the main heat exchange plate through the main plate inlet pipe, and enters through the auxiliary plate.
- the tube is connected to the auxiliary heat exchange plate; the outlet header of the previous heat exchange module is connected to the inlet header of the next heat exchange module through the connecting pipe, which is characterized in that the number of auxiliary heat exchange plates in the uppermost heat exchange module is n1, the number of auxiliary heat exchange plates in the next layer of heat exchange module is n2, and the number of auxiliary heat exchange plates in the next layer of heat exchange module is n3, and so on, n1, n2, n3 represent natural numbers, and The number of auxiliary heat exchange plates in at least one layer of heat exchange module is not zero; in the heat exchange module with auxiliary heat exchange plates, the connection point between the main plate inlet pipe and the inlet header is higher than the auxiliary plate The connection point between the inlet pipe and the inlet header.
- the number of auxiliary heat exchange plates in each heat exchange module from top to bottom gradually increases.
- connection point between the main plate inlet pipe and the inlet header is located in the middle of the height direction of the inlet header, and the connection point between the auxiliary plate inlet pipe and the inlet header is located on the bottom side of the inlet header .
- the auxiliary heat exchange plates in each heat exchange module are installed on the same side of the heat exchanger.
- the present invention utilizes the confluence and gas-liquid separation functions of the inlet header. Most of the gas phase (steam) flows through the main heat exchange plates, and most of the liquid phase (including oil) enters the auxiliary heat exchange plates. Due to the effect of confluence, the flow of the liquid phase is accelerated, thereby increasing the thermal conductivity of the liquid phase, and increasing the discharge speed of the liquid phase, thereby improving the overall heat exchange efficiency. As the liquid phase and oil content (oil film) in the main heat exchange plate are significantly reduced, the heat exchange effect is significantly improved. In the case of achieving equivalent heat exchange, the use of the present invention can greatly reduce the specifications of the heat exchanger, thereby greatly reducing the manufacturing, operation and maintenance costs of the heat exchange device, and reducing the area of the heat exchange device.
- next module is provided with more auxiliary heat exchange plates than the previous module.
- This design ensures that during the top-down heat exchange process of the plate side fluid, the gradually increasing liquid phase output can be split in time, ensuring that the heat exchanger always operates in a balanced manner and obtaining a more optimized heat exchange effect.
- the auxiliary heat exchange plates of the present invention have a small number and are installed on the same side of the heat exchanger, making it easier to disassemble and remove oil, and the large amount of oil storage of the main heat exchange plates is effectively controlled, which prolongs the maintenance cycle of the whole machine.
- Fig. 1 is a schematic diagram of the structure and working principle of an embodiment of the present invention.
- Figure 1 only one main heat exchange plate and one auxiliary heat exchange plate are shown in each module due to the shielding relationship.
- FIG. 2 is a schematic structural diagram from another perspective of the embodiment of the present invention. Compared with FIG. 1, FIG. 2 is a left-side schematic diagram.
- the housing is omitted in both figures.
- this embodiment includes a shell and a three-layer heat exchange module installed in the shell.
- Each heat exchange module includes several main heat exchange plates 4 and at least one auxiliary heat exchange plate 5 installed in parallel.
- the medium inlet of the heat exchange plates is equipped with an inlet header, and the medium outlet is equipped with an outlet. Header.
- the inlet header is connected to the main heat exchange plate through the main plate inlet pipe 3, and is connected to the auxiliary heat exchange plate through the auxiliary plate inlet pipe 15.
- the main heat exchange plate is connected to the outlet header through the main plate outlet pipe 6 and the auxiliary heat exchange plate is connected to the outlet header through the auxiliary plate outlet pipe 16 respectively.
- Different heat exchange modules can be installed in the same shell or in different shells.
- the side-by-side installation means that the bottom ends are flush and parallel to each other.
- all main heat exchange plates have the same height
- all auxiliary heat exchange plates have the same height and are equal to or lower than the main heat exchange plates.
- the preferred solution is that the auxiliary heat exchange plates are lower than the main heat exchange plates. .
- the upper inlet header 2 of the upper heat exchange module is connected to the main inlet pipe 1, and the upper outlet header 7 of the upper heat exchange module is connected to the middle inlet header 9 of the middle heat exchange module through the first connecting pipe 8.
- the middle outlet header 14 of the middle heat exchange module is connected to the lower inlet header 12 of the lower heat exchange module through the second connecting pipe 13, and the lower outlet header 10 of the lower heat exchange module is connected to the main outlet pipe 11.
- Figure 2 is only a schematic diagram of the structure. In actual production, the number of main heat exchange plates is much larger than that of auxiliary heat exchange plates.
- connection point between the main plate inlet pipe 3 and the inlet header is higher than the connection point between the auxiliary plate inlet pipe 15 and the inlet header, and the auxiliary plate
- the connection point between the inlet pipe 15 and the inlet header is higher than the connection point between the auxiliary plate inlet pipe 15 and the auxiliary heat exchange plate.
- the connection point between the main plate inlet pipe 3 and the inlet header is located in the middle of the height direction of the inlet header, and the connection point between the auxiliary plate inlet pipe 15 and the inlet header is located at the center of the inlet header. Bottom side.
- the above is an optimized embodiment of the present invention. It meets the requirement of increasing the number of auxiliary heat exchange plates in each heat exchange module from top to bottom (that is, it conforms to n3>n2>n1).
- Other specific technical solutions that meet this requirement are for example: among several heat exchange modules arranged up and down, the top layer has no auxiliary heat exchange plates, and other layers have auxiliary heat exchange plates.
- An example of the general technical solution of the present invention among several heat exchange modules arranged up and down, only the middle layer has auxiliary heat exchange plates, and the upper and lower layers do not have them.
- the auxiliary heat exchange plates are generally installed on the same side of the heat exchange module, close to the same side of the heat exchanger shell, so that only the auxiliary heat exchange plates can be replaced or degreasing cleaning.
- the plate mentioned in the present invention is composed of two identical metal plates, and a medium channel is formed between the two metal plates.
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The present invention provides a plate heat exchanger having a flow-dividing plate path. The heat exchanger comprises a housing and two or more heat exchange modules vertically disposed in the housing. The number of auxiliary heat exchange plates in the uppermost heat exchange module is n1, the number of auxiliary heat exchange plates in the next heat exchange module is n2, and the number of auxiliary heat exchange plates in the next heat exchange module is n3, and so on, where n1, n2, and n3 are natural numbers, and at least one heat exchange module has a non-zero number of auxiliary heat exchange plates therein. In each heat exchange module provided with an auxiliary heat exchange plate, the connection point between a main plate inlet pipe and an inlet-end collection pipe is higher than the connection point between an auxiliary plate inlet pipe and the inlet-end collection pipe. Part of liquid phase substances, including oil, in plate-path fluids are concentrated and converged by means of the inlet-end collection pipe, and are then introduced into a separate auxiliary plate to accelerate discharge of the liquid phase substances, thereby greatly reducing the amount of liquid phase substances and oil passing through heat exchange fins of the main unit, and improving the overall heat exchange efficiency of the device.
Description
本发明涉及一种板式换热装置，主要应用于板程为蒸汽（特别是含油蒸汽）的换热装置，比如冷凝装置、蒸发装置和流体加热装置。The invention relates to a plate heat exchange device, which is mainly applied to heat exchange devices with steam (especially oil-containing steam) on the plate side, such as a condensing device, an evaporation device and a fluid heating device.
现有的将气相冷凝成液相的换热器，比如冷凝器，主要包括板壳式（壳程中的水吸热）、风冷式（常温空气作冷能）和蒸发冷式（通过水蒸发吸热）。在上述换热过程中，板程（属于管程）中的液相（冷凝液）逐渐增多。另外，有些介质中含油，容易在换热器内表面形成油膜。冷凝液和油膜的形成和积累将严重影响换热器内介质流动速度，导致换热效率降低。在压缩机***中，冷凝液和油膜的形成和积累还会导致压缩机因排气压力升高而增加能耗。特别是在环境温度较高的场所，压缩机排气压力过高还会产生安全隐患。Existing heat exchangers that condense the gas phase into the liquid phase, such as condensers, mainly include the plate and shell type (the water in the shell side absorbs heat), the air-cooled type (room temperature air is used as cooling energy) and the evaporative cooling type (through water Evaporation endothermic). In the above heat exchange process, the liquid phase (condensate) in the plate side (belonging to the tube side) gradually increases. In addition, some media contain oil, which easily forms an oil film on the inner surface of the heat exchanger. The formation and accumulation of condensate and oil film will seriously affect the flow rate of the medium in the heat exchanger, resulting in a decrease in heat exchange efficiency. In the compressor system, the formation and accumulation of condensate and oil film will also cause the compressor to increase energy consumption due to the increase in discharge pressure. Especially in places with high ambient temperature, excessive compressor discharge pressure can also cause safety hazards.
公开号为
CN104132557A的中国专利申请涉及“一种中间排液式高效冷凝***。其在前级换热器末端实施了中间排液，这一措施加速了液膜的排出，从而使换热系数上升。并且有效提高了换热器换热面的利用率，保证了前级换热器始终处于高效换热状态。经过使用发现，该中间排液措施虽然能够在提高换热效率方面具有一定效果，但由于其做法是将冷凝液引出换热器，而这部分引出介质一般为气液混合相，仍蓄有很高的热能，一方面会造成热能利用率降低，另一方面，增加了制冷***的运行负荷。
The public number is The Chinese patent application of CN104132557A relates to "an intermediate drainage type high-efficiency condensation system. It implements intermediate drainage at the end of the front-stage heat exchanger. This measure accelerates the discharge of the liquid film, thereby increasing the heat transfer coefficient. And effective The utilization rate of the heat exchange surface of the heat exchanger is improved, and the front-stage heat exchanger is always in a high-efficiency heat exchange state. After use, it is found that although the intermediate drainage measure can have a certain effect in improving the heat exchange efficiency, it is due to its The method is to lead the condensate out of the heat exchanger, and this part of the extraction medium is generally a gas-liquid mixed phase, which still stores high heat energy. On the one hand, it will reduce the utilization rate of heat energy, and on the other hand, it will increase the operating load of the refrigeration system. .
本发明所要解决的技术问题是，提供一种板程分流式板式换热器，将板程流体中部分包括油在内的液相通过进端集管集中汇流后引入单独的辅助板片中，加速液相排出，大幅度降低通过主体换热片的液相及油的含量，从而提高装置整体换热效率。The technical problem to be solved by the present invention is to provide a plate-side split-flow plate heat exchanger, in which part of the liquid phase of the plate-side fluid, including oil, is concentrated and converged through an inlet header and then introduced into a separate auxiliary plate. Accelerate the discharge of liquid phase, greatly reduce the content of liquid phase and oil passing through the main heat exchange fins, thereby improving the overall heat exchange efficiency of the device.
本发明的技术方案如下：The technical scheme of the present invention is as follows:
板程分流式板式换热器，包括壳体和安装在壳体内并且上下排布的两个以上换热模块，换热模块包括并列安装的若干个主换热板片和一定数量的辅助换热板片，换热板片的介质进端安装有进端集管，介质出端安装有出端集管，进端集管通过主板片进管连接主换热板片，并通过辅助板片进管连接辅助换热板片；上一换热模块的出端集管通过连接管连接下一换热模块的进端集管，其特征在于：最上层换热模块中辅助换热板片数量为n1，它的下一层换热模块中辅助换热板片数量为n2，再下一层换热模块中辅助换热板片数量为n3，依此类推，n1、n2、n3代表自然数，且至少有一层换热模块中辅助换热板片的数量不为零；在设置辅助换热板片的换热模块中，主板片进管与进端集管之间的连接点高于辅助板片进管与进端集管之间的连接点。The plate-pass split-flow plate heat exchanger includes a shell and two or more heat exchange modules installed in the shell and arranged up and down. The heat exchange module includes several main heat exchange plates installed in parallel and a certain number of auxiliary heat exchanges. Plate, the medium inlet of the heat exchange plate is equipped with an inlet header, and the medium outlet is equipped with an outlet header. The inlet header is connected to the main heat exchange plate through the main plate inlet pipe, and enters through the auxiliary plate. The tube is connected to the auxiliary heat exchange plate; the outlet header of the previous heat exchange module is connected to the inlet header of the next heat exchange module through the connecting pipe, which is characterized in that the number of auxiliary heat exchange plates in the uppermost heat exchange module is n1, the number of auxiliary heat exchange plates in the next layer of heat exchange module is n2, and the number of auxiliary heat exchange plates in the next layer of heat exchange module is n3, and so on, n1, n2, n3 represent natural numbers, and The number of auxiliary heat exchange plates in at least one layer of heat exchange module is not zero; in the heat exchange module with auxiliary heat exchange plates, the connection point between the main plate inlet pipe and the inlet header is higher than the auxiliary plate The connection point between the inlet pipe and the inlet header.
优选地，自上而下的各换热模块中辅助换热板片的数量逐渐增加。Preferably, the number of auxiliary heat exchange plates in each heat exchange module from top to bottom gradually increases.
优选地，主板片进管与进端集管之间的连接点位于进端集管高度方向的中间，辅助板片进管与进端集管之间的连接点位于进端集管的底侧。Preferably, the connection point between the main plate inlet pipe and the inlet header is located in the middle of the height direction of the inlet header, and the connection point between the auxiliary plate inlet pipe and the inlet header is located on the bottom side of the inlet header .
优选地，各换热模块中辅助换热板片安装在换热器同一个侧面。Preferably, the auxiliary heat exchange plates in each heat exchange module are installed on the same side of the heat exchanger.
本发明的积极效果在于：The positive effects of the present invention are:
一、本发明利用了进端集管的汇流和气液分离功能，大部分气相（蒸汽）流经主体换热板片，大部分液相（包括油）进入辅助换热板片。由于汇流作用液相流动加快，从而提高了液相导热系数，并提高了液相的排出速度，整体上提高了换热效率。而主体换热板片内由于液相和油成分（油膜）明显减少，其热交换效果得到明显改善。在实现等同换热量的情况下，利用本发明能够大幅度降低换热器规格，从而大幅度减少换热装置的制造、运维成本，并减少换热装置占地面积。1. The present invention utilizes the confluence and gas-liquid separation functions of the inlet header. Most of the gas phase (steam) flows through the main heat exchange plates, and most of the liquid phase (including oil) enters the auxiliary heat exchange plates. Due to the effect of confluence, the flow of the liquid phase is accelerated, thereby increasing the thermal conductivity of the liquid phase, and increasing the discharge speed of the liquid phase, thereby improving the overall heat exchange efficiency. As the liquid phase and oil content (oil film) in the main heat exchange plate are significantly reduced, the heat exchange effect is significantly improved. In the case of achieving equivalent heat exchange, the use of the present invention can greatly reduce the specifications of the heat exchanger, thereby greatly reducing the manufacturing, operation and maintenance costs of the heat exchange device, and reducing the area of the heat exchange device.
二、优化技术方案中，下一模块中设置有较上一模块更多的辅助换热板片。这种设计确保板程流体自上而下流动换热过程中，逐渐增加的液相产出能够及时分流，确保换热器始终平衡运行，得到更优化的换热效果。2. In the optimized technical solution, the next module is provided with more auxiliary heat exchange plates than the previous module. This design ensures that during the top-down heat exchange process of the plate side fluid, the gradually increasing liquid phase output can be split in time, ensuring that the heat exchanger always operates in a balanced manner and obtaining a more optimized heat exchange effect.
三、本发明辅助换热板片数量较少且安装在换热器同一个侧面，更便于拆卸除油，而大量的主换热板片存油量得到有效控制，延长了整机维护周期。3. The auxiliary heat exchange plates of the present invention have a small number and are installed on the same side of the heat exchanger, making it easier to disassemble and remove oil, and the large amount of oil storage of the main heat exchange plates is effectively controlled, which prolongs the maintenance cycle of the whole machine.
图1是本发明实施例的结构和工作原理示意图。图1中，由于遮挡关系每一模块中仅显示了一个主换热板片和一个辅助换热板片。Fig. 1 is a schematic diagram of the structure and working principle of an embodiment of the present invention. In Figure 1, only one main heat exchange plate and one auxiliary heat exchange plate are shown in each module due to the shielding relationship.
图2是本发明实施例的另一视角结构示意图。相对于图1，图2属于左视示意图。Fig. 2 is a schematic structural diagram from another perspective of the embodiment of the present invention. Compared with FIG. 1, FIG. 2 is a left-side schematic diagram.
两图中均省略了壳体。The housing is omitted in both figures.
下面结合附图和实施例进一步说明本发明。The present invention will be further described below in conjunction with the drawings and embodiments.
如图1和图2，本实施例包括壳体和安装在壳体内的三层换热模块。每一换热模块均包括并列安装的若干个主换热板片4和至少一个辅助换热板片5，换热板片的介质进端安装有进端集管，介质出端安装有出端集管。进端集管通过主板片进管3连接主换热板片，并通过辅助板片进管15连接辅助换热板片。主换热板片通过主板片出管6和辅助换热板片通过辅助板片出管16分别连接出端集管。As shown in Figure 1 and Figure 2, this embodiment includes a shell and a three-layer heat exchange module installed in the shell. Each heat exchange module includes several main heat exchange plates 4 and at least one auxiliary heat exchange plate 5 installed in parallel. The medium inlet of the heat exchange plates is equipped with an inlet header, and the medium outlet is equipped with an outlet. Header. The inlet header is connected to the main heat exchange plate through the main plate inlet pipe 3, and is connected to the auxiliary heat exchange plate through the auxiliary plate inlet pipe 15. The main heat exchange plate is connected to the outlet header through the main plate outlet pipe 6 and the auxiliary heat exchange plate is connected to the outlet header through the auxiliary plate outlet pipe 16 respectively.
不同换热模块可以安装在同一壳体内，也可以安装在不同壳体内。Different heat exchange modules can be installed in the same shell or in different shells.
所述的并列安装指底端平齐且互相平行设置。一般的，全部主换热板片具有相同的高度，全部辅助换热板片具有相同的高度且等于或低于主换热板片，优选方案是辅助换热板片低于主换热板片。The side-by-side installation means that the bottom ends are flush and parallel to each other. Generally, all main heat exchange plates have the same height, and all auxiliary heat exchange plates have the same height and are equal to or lower than the main heat exchange plates. The preferred solution is that the auxiliary heat exchange plates are lower than the main heat exchange plates. .
本实施例中，上层换热模块的上进端集管2连接总进管1，上层换热模块的上出端集管7通过第一连接管8连接中层换热模块的中进端集管9，中层换热模块的中出端集管14通过第二连接管13连接下层换热模块的下进端集管12，下层换热模块的下出端集管10连接总出管11。本方案中n1=1、n2=2、n=3，如图2。图2仅是结构示意图，实际制作中主换热板片数量远多于辅助换热板片。In this embodiment, the upper inlet header 2 of the upper heat exchange module is connected to the main inlet pipe 1, and the upper outlet header 7 of the upper heat exchange module is connected to the middle inlet header 9 of the middle heat exchange module through the first connecting pipe 8. The middle outlet header 14 of the middle heat exchange module is connected to the lower inlet header 12 of the lower heat exchange module through the second connecting pipe 13, and the lower outlet header 10 of the lower heat exchange module is connected to the main outlet pipe 11. In this scheme, n1=1, n2=2, n=3, as shown in Figure 2. Figure 2 is only a schematic diagram of the structure. In actual production, the number of main heat exchange plates is much larger than that of auxiliary heat exchange plates.
在设置辅助换热板片的换热模块中，主板片进管3与进端集管之间的连接点高于辅助板片进管15与进端集管之间的连接点，辅助板片进管15与进端集管之间的连接点高于辅助板片进管15与辅助换热板片之间的连接点。一般的，主板片进管3与进端集管之间的连接点位于进端集管高度方向的中间，辅助板片进管15与进端集管之间的连接点位于进端集管的底侧。In the heat exchange module with auxiliary heat exchange plates, the connection point between the main plate inlet pipe 3 and the inlet header is higher than the connection point between the auxiliary plate inlet pipe 15 and the inlet header, and the auxiliary plate The connection point between the inlet pipe 15 and the inlet header is higher than the connection point between the auxiliary plate inlet pipe 15 and the auxiliary heat exchange plate. Generally, the connection point between the main plate inlet pipe 3 and the inlet header is located in the middle of the height direction of the inlet header, and the connection point between the auxiliary plate inlet pipe 15 and the inlet header is located at the center of the inlet header. Bottom side.
以上是本发明的一个优化实施例。其符合自上而下的各换热模块中辅助换热板片的数量逐渐增加的要求（即符合n3＞n2＞n1）。符合本要求的其他具体技术方案比如：上下排布的若干个换热模块中，最上层没有辅助换热板片，其他层带有辅助换热板片。本发明的普通技术方案举例：上下排布的若干个换热模块中，仅中间一层带有辅助换热板片，其上、下层都不带。The above is an optimized embodiment of the present invention. It meets the requirement of increasing the number of auxiliary heat exchange plates in each heat exchange module from top to bottom (that is, it conforms to n3>n2>n1). Other specific technical solutions that meet this requirement are for example: among several heat exchange modules arranged up and down, the top layer has no auxiliary heat exchange plates, and other layers have auxiliary heat exchange plates. An example of the general technical solution of the present invention: among several heat exchange modules arranged up and down, only the middle layer has auxiliary heat exchange plates, and the upper and lower layers do not have them.
实际制作中，辅助换热板片一般集中安装在所在换热模块同一侧，靠近换热器壳体同一侧，以便于仅针对辅助换热板片实施更换或者除油清洗。In actual production, the auxiliary heat exchange plates are generally installed on the same side of the heat exchange module, close to the same side of the heat exchanger shell, so that only the auxiliary heat exchange plates can be replaced or degreasing cleaning.
本发明所说的板片是由两片相同的金属板复合而成，两片金属板之间是介质通道。The plate mentioned in the present invention is composed of two identical metal plates, and a medium channel is formed between the two metal plates.
Claims (5)
- 板程分流式板式换热器，包括壳体和安装在壳体内并且上下排布的两个以上换热模块，换热模块包括并列安装的若干个主换热板片和一定数量的辅助换热板片，换热板片的介质进端安装有进端集管，介质出端安装有出端集管，进端集管通过主板片进管连接主换热板片，并通过辅助板片进管连接辅助换热板片；上一换热模块的出端集管通过连接管连接下一换热模块的进端集管，其特征在于：最上层换热模块中辅助换热板片数量为n1，它的下一层换热模块中辅助换热板片数量为n2，再下一层换热模块中辅助换热板片数量为n3，依此类推，n1、n2、n3代表自然数，且至少有一层换热模块中辅助换热板片的数量不为零；在设置辅助换热板片的换热模块中，主板片进管与进端集管之间的连接点高于辅助板片进管与进端集管之间的连接点。The plate-pass split-flow plate heat exchanger includes a shell and two or more heat exchange modules installed in the shell and arranged up and down. The heat exchange module includes several main heat exchange plates installed in parallel and a certain number of auxiliary heat exchanges. Plate, the medium inlet of the heat exchange plate is equipped with an inlet header, and the medium outlet is equipped with an outlet header. The inlet header is connected to the main heat exchange plate through the main plate inlet pipe, and enters through the auxiliary plate. The tube is connected to the auxiliary heat exchange plate; the outlet header of the previous heat exchange module is connected to the inlet header of the next heat exchange module through the connecting pipe, which is characterized in that the number of auxiliary heat exchange plates in the uppermost heat exchange module is n1, the number of auxiliary heat exchange plates in the next layer of heat exchange module is n2, and the number of auxiliary heat exchange plates in the next layer of heat exchange module is n3, and so on, n1, n2, n3 represent natural numbers, and The number of auxiliary heat exchange plates in at least one layer of heat exchange module is not zero; in the heat exchange module with auxiliary heat exchange plates, the connection point between the main plate inlet pipe and the inlet header is higher than the auxiliary plate The connection point between the inlet pipe and the inlet header.
- 如权利要求1所述的板程分流式板式换热器，其特征在于：自上而下的各换热模块中辅助换热板片的数量逐渐增加。The plate-pass split-flow plate heat exchanger according to claim 1, wherein the number of auxiliary heat exchange plates in each heat exchange module from top to bottom gradually increases.
- 如权利要求1或2所述的板程分流式板式换热器，其特征在于：主板片进管与进端集管之间的连接点位于进端集管高度方向的中间，辅助板片进管与进端集管之间的连接点位于进端集管的底侧。The plate-pass split-flow plate heat exchanger according to claim 1 or 2, wherein the connection point between the main plate inlet pipe and the inlet header is located in the middle of the height direction of the inlet header, and the auxiliary plate inlet The connection point between the pipe and the inlet header is located on the bottom side of the inlet header.
- 如权利要求1或2所述的板程分流式板式换热器，其特征在于：各换热模块中辅助换热板片安装在换热器同一个侧面。The plate-pass split-flow plate heat exchanger according to claim 1 or 2, wherein the auxiliary heat exchange plates in each heat exchange module are installed on the same side of the heat exchanger.
- 如权利要求3所述的板程分流式板式换热器，其特征在于：各换热模块中辅助换热板片安装在换热器同一个侧面。The plate-pass split-flow plate heat exchanger according to claim 3, wherein the auxiliary heat exchange plates in each heat exchange module are installed on the same side of the heat exchanger.
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