WO2021203666A1 - 一种板式冷凝器换热板片 - Google Patents

一种板式冷凝器换热板片 Download PDF

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Publication number
WO2021203666A1
WO2021203666A1 PCT/CN2020/121366 CN2020121366W WO2021203666A1 WO 2021203666 A1 WO2021203666 A1 WO 2021203666A1 CN 2020121366 W CN2020121366 W CN 2020121366W WO 2021203666 A1 WO2021203666 A1 WO 2021203666A1
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Prior art keywords
plate
heat exchange
flow channel
salient points
plate bodies
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PCT/CN2020/121366
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English (en)
French (fr)
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吴俐俊
苑昭阔
戴亚洲
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南京同诚节能环保装备研究院有限公司
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Publication of WO2021203666A1 publication Critical patent/WO2021203666A1/zh

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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
    • F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
    • F28F3/08—Elements constructed for building-up into stacks, e.g. capable of being taken apart for cleaning
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
    • F28F3/02—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
    • F28F3/04—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element
    • F28F3/042—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element in the form of local deformations of the element
    • 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
    • F28F9/24—Arrangements for promoting turbulent flow of heat-exchange media, e.g. by plates

Definitions

  • the invention belongs to the field of high-efficiency heat exchange and energy-saving equipment, and relates to a heat exchange plate used for a plate-type condensation heat exchanger.
  • finned tube heat exchangers are often used in gas-liquid-phase heat exchangers.
  • the phase change medium goes inside the tube, and the other medium goes to the fin side.
  • Cross-flow heat exchange is used between the phase change medium and the other medium.
  • the heat exchange effect of this fin-tube heat exchanger is not good, causing the medium in the tube to fail.
  • Complete phase change wasting a lot of energy; on the other hand, the fin-tube heat exchanger has poor heat exchange capacity and needs to consume a lot of tubes, poor mechanical seal, easy to accumulate dust on the fin side, and the fin is easy to fall off, causing contact thermal resistance
  • the increase results in a significant reduction in the heat exchange capacity of the heat exchanger and a reduction in the service life.
  • phase change plate heat exchangers have the characteristics of compact structure, small floor space, and high heat transfer efficiency.
  • traditional plate heat exchangers are compact in structure, they have flow channels. Complicated, the flow resistance on both sides of the medium is large.
  • the traditional plate heat exchanger requires rubber ring sealing, which is not suitable for high-temperature steam heat exchange.
  • the phase change of steam will cause the volume to be greatly reduced, while the traditional plate type has no flow channel cross-sectional area
  • the change causes the fluid flow rate to fail to reach turbulence after the phase change, and the heat exchange effect is reduced.
  • the bumps on the heat exchange surface of other heat exchange plates are basically circular, but the biggest disadvantage of the circular structure is the defect of the dynamic flow channel, which is prone to heat exchange dead angles.
  • the purpose of the present invention is to overcome the deficiencies in the prior art and provide a plate condenser heat exchange plate with compact structure, high heat exchange efficiency and good dynamic flow.
  • the technical scheme adopted by the present invention is: a plate condenser heat exchange plate, the edge of which is welded with an inlet and an outlet connecting the inner cavity of the heat exchange fin, and its characteristic is: a number of baffle lines are set on the plate This forms a flow channel, and as the condensation process deepens, the flow area of the flow channel gradually decreases.
  • a plurality of circular and elliptical bumps for turbulence and heat transfer enhancement are provided in the flow channel area of the heat exchange plate, which are made by two methods: one is to first pass the roll forming , And then conduct resistance welding on the bumps of the plates; second, perform fixed-point welding on the two stacked plates, and then shape them by inflation.
  • the ratio of the major and minor axes of the ellipse is in the range of 1:1—0.6:0.4
  • the diameter of the round bump is 1mm-50mm.
  • a number of baffles are arranged on the plates to form a flow channel, and as the phase change medium condenses, the volume is greatly reduced, and the flow area of the flow channel is gradually reduced, which overcomes the heat transfer process. Condensation of the medium changes from a gaseous state to a liquid state, resulting in a decrease in volume, which will reduce the flow rate, thereby affecting the problem of heat transfer.
  • circular and elliptical bumps are set to turbulent flow and enhance heat transfer. The circular and elliptical bumps not only enhance heat transfer, but also increase the mechanical strength of the plate.
  • Figure 1 is a schematic diagram of the structure of the present invention.
  • a heat exchange plate used in a plate condensing heat exchanger of the present invention is formed by the welding edges of two plates, and the edges are welded with the inlet 1 and the heat exchange channel connecting the plates.
  • a number of baffles 3 are set on the plate to form a flow channel.
  • the condensing medium enters from the inlet 1 of the flow channel.
  • the condensation process deepens, the condensing medium changes from gaseous to liquid, reducing its volume.
  • Streamline 3 gradually reduces the flow area of the flow channel, which overcomes the problem that the volume reduction due to the phase change of the medium condensation from gas to liquid during the heat transfer process will reduce the flow rate and affect the heat transfer.
  • circular and elliptical bumps 4 are set in the runner area to spoil the flow and enhance heat exchange. It can be made by two methods. One is to roll forming first, and then the bumps of the plate are processed. Resistance welding; second, the two stacked plates are welded at a fixed point first, and then formed by inflation.
  • the characteristic is that the circular and elliptical bumps 4 not only enhance the heat exchange, but also increase the mechanical properties of the plates. strength.
  • the ratio of the long and short axis of the ellipse on the heat exchange plate is in the range of 1:1 to 0.6:0.4, and the diameter of the round bump is between 1mm and 50mm.
  • the plate condensing heat exchanger has a compact structure, easy assembly, high temperature and high pressure resistance, high heat exchange efficiency, long service life, and easy automated production.
  • the heat exchange plate of a plate type condensing heat exchanger of the present invention is any modification, equivalent replacement and improvement made within the spirit and principle of the patent of the present invention shall be included in the patent of the present invention.
  • the heat exchanger plates can be used as condensers of any medium (such as ammonia condensation, steam condensation, methanol condensation, transformer oil condensation, etc.), evaporator, air preheater, powder drying or cooling exchange Heater.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid Mechanics (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

一种板式冷凝器换热板片，它是由两块板片焊接边缘形成的，其边缘焊接有连接换热片内腔的进口与出口，在板片上设置了若干条折流线，以此形成循环折流流道。在流道区域则设置了圆形与椭圆形凸点，进行扰流，增强换热，圆形凸点既起到了增强流道抗压能力，又起到了扰流作用，椭圆凸点改善了介质流道动力学性能；它由两种方法制作而成：一是先通过辊压成型，再将板片的凸点处进行电阻焊接；二是先将叠放的两块板片进行定点焊接，再通过吹胀的方式成型。本发明的圆形与椭圆形凸点既增强了换热，又增加了板片的机械强度；该板式冷凝换热器板片结构紧凑，易于组装，耐高温高压，换热效率高，使用寿命长。

Description

一种板式冷凝器换热板片 技术领域
本发明属于高效换热节能设备领域，涉及一种用于板式冷凝换热器的换热板片。
背景技术
目前气液相变换热器常采用翅片管式换热器。其中相变介质走管内，另一介质走翅片侧，相变介质与另一介质之间采用错流换热，但这种翅片管式换热器换热效果欠佳，造成管内介质不能完全相变，浪费大量的能量；另一方面翅片管式换热器换热能力差，需要消耗大量的管材，机械密封性差，翅片侧易积灰，同时翅片容易脱落造成接触热阻增加，导致换热器换热能力大幅度降低，使用寿命降低。
现有技术中，对相变板式换热器的报道较少，而板式换热器具有结构紧凑，占地面积小，传热效率高等特点，但是传统板式换热器虽然结构紧凑，但是流道复杂，介质两侧流动阻力较大，同时传统板式换热器需要橡胶圈密封，不适用于高温蒸汽换热，同时蒸汽发生相变会造成体积大幅降低，而传统板式在流道截面积上没有变化，造成相变后流体流速达不到湍流，换热效果降低。其他换热板片在换热表面凸点基本为圆形，但圆形结构最大的缺点是动力学流道缺陷，容易产生换热死角。
发明内容
本发明的目的是克服现有技术中存在的不足，提供一种结构紧凑、换热效率高、动力学流动较好的板式冷凝器换热板片，
本发明所采用的技术方案是：一种板式冷凝器换热板片，其边缘焊接有连接换热片内腔的进口与出口，其特点是：在板片上设置了若干条折流线，以此形成流道，且随着冷凝过程深入，流道通流面积逐渐减小。
进一步的，在所述的换热板片流道区域设置有用于扰流及增强换热的多个圆形与椭圆形凸点，它由两种方法制作而成：一是先通过辊压成型，再将板片的凸点处进行电阻焊接；二是先将叠放的两块板片进行定点焊接，再通过吹胀的方式成型，其中椭圆长短轴比例范围为1:1—0.6:0.4，圆形凸点直径为1mm-50mm。
本发明的有益效果：在板片上设置了若干条折流线，以此形成流道，且随着相变介质冷凝，体积大大减少，流道通流面积逐渐减小，克服了传热过程因介质冷凝相变由气态变为液态导致体积减少会使流速下降，从而影响换热的问题。在流道区域则设置了圆形与椭圆形凸点，进行扰流，增强换热，圆形与椭圆形凸点既增强了换热，又增加了板片的机械强度。
附图说明
图1为本发明的结构示意图。
图中：1、进口；2、出口；3、折流线；4、圆形与椭圆形凸点。
具体实施方式
为使本发明的目的、技术方案和优点更加清楚，下面将结合附图对本发明实施方式做进一步详细描述。
如图1所示，本发明的一种用于板式冷凝换热器的换热板片，是由两块板片焊接边缘形成的，其边缘上焊接有连接板片换热通道的进口1与出口2，在板片上设置了若干条折流线3，以此形成流道，冷凝介质从流道的进口1进入，随着冷凝过程的深入，冷凝介质由气态向液态转变，体积减少，折流线3使流道通流面积逐渐减小，克服了传热过程因介质冷凝相变由气态变为液态导致体积减少会使流速下降，从而影响换热的问题。
同时在流道区域设置了圆形与椭圆形凸点4，进行扰流，增强换热，它可由两种方法制作而成，一是先通过辊压成型，再将板片的凸点处进行电阻焊接；二是先将叠放的两块板片进行定点焊接，再通过吹胀的方式成型，其特点是圆形与椭圆形凸点4既增强了换热，又增加了板片的机械强度。换热板片上的椭圆的长短轴之比，范围在1:1至0.6:0.4之间，圆形凸点的直径在1mm至50mm之间。该板式冷凝换热器板片结构紧凑，易于组装，耐高温高压，换热效率高，使用寿命长，易于自动化生产。
以上所述为本发明一种板式冷凝换热器换热板片，凡在本发明专利的精神和原则之内，所做的任何修改、等同替换和改进等，均应包含在本发明专利的保护范围之内，该换热器板片可以作为任何介质的冷凝器(如氨气冷凝，蒸汽冷凝，甲醇冷凝、变压器油冷凝等)、蒸发器、空预器，粉料烘干或降温换热器。

Claims (2)

  1. 一种板式冷凝换热器换热板片，其边缘焊接有连接换热片内腔的进口与出口，其特征在于：在板片上设置了若干条折流线，以此形成流道，且随着冷凝过程深入，流道通流面积逐渐减小。
  2. 根据权利要求1所述的一种板式冷凝换热器换热板片，其特征在于：在所述的换热板片流道区域设置有用于扰流和增强换热的多个圆形与椭圆形凸点，它由两种方法制作而成：一是先通过辊压成型，再将板片的凸点处进行电阻焊接；二是先将叠放的两块板片进行定点焊接，再通过吹胀的方式成型，其中椭圆长短轴比例范围为1:1—0.6:0.4，圆形凸点直径为1mm-50mm。
PCT/CN2020/121366 2020-04-10 2020-10-16 一种板式冷凝器换热板片 WO2021203666A1 (zh)

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Publication number Priority date Publication date Assignee Title
CN111351388A (zh) * 2020-04-10 2020-06-30 南京同诚节能环保装备研究院有限公司 一种板式冷凝器换热板片

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JP2000205783A (ja) * 1999-01-19 2000-07-28 Calsonic Kansei Corp 熱交換器用偏平チュ―ブ
CN2624160Y (zh) * 2003-06-03 2004-07-07 广州市华德工业有限公司 板式换热管片
CN201206958Y (zh) * 2008-03-31 2009-03-11 洛阳蓝海实业有限公司 双面整体扰流换热板片
CN201740443U (zh) * 2010-06-21 2011-02-09 四川宜宾江源化工机械制造有限责任公司 一种用于板式换热器的换热板
CN203298646U (zh) * 2013-04-24 2013-11-20 李永堂 复合鼓包板式换热片
CN209639590U (zh) * 2019-01-23 2019-11-15 大金空调（上海）有限公司 板式换热器片以及蒸发式冷凝器
CN111351388A (zh) * 2020-04-10 2020-06-30 南京同诚节能环保装备研究院有限公司 一种板式冷凝器换热板片

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000205783A (ja) * 1999-01-19 2000-07-28 Calsonic Kansei Corp 熱交換器用偏平チュ―ブ
CN2624160Y (zh) * 2003-06-03 2004-07-07 广州市华德工业有限公司 板式换热管片
CN201206958Y (zh) * 2008-03-31 2009-03-11 洛阳蓝海实业有限公司 双面整体扰流换热板片
CN201740443U (zh) * 2010-06-21 2011-02-09 四川宜宾江源化工机械制造有限责任公司 一种用于板式换热器的换热板
CN203298646U (zh) * 2013-04-24 2013-11-20 李永堂 复合鼓包板式换热片
CN209639590U (zh) * 2019-01-23 2019-11-15 大金空调（上海）有限公司 板式换热器片以及蒸发式冷凝器
CN111351388A (zh) * 2020-04-10 2020-06-30 南京同诚节能环保装备研究院有限公司 一种板式冷凝器换热板片

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