WO2018141245A1 - Plate-type gas-to-gas heat exchanger - Google Patents

Plate-type gas-to-gas heat exchanger Download PDF

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Publication number
WO2018141245A1
WO2018141245A1 PCT/CN2018/074764 CN2018074764W WO2018141245A1 WO 2018141245 A1 WO2018141245 A1 WO 2018141245A1 CN 2018074764 W CN2018074764 W CN 2018074764W WO 2018141245 A1 WO2018141245 A1 WO 2018141245A1
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Prior art keywords
gas
plate
heat exchanger
corrugated
heat exchange
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Ceased
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PCT/CN2018/074764
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French (fr)
Chinese (zh)
Inventor
吴俐俊
单方坚
王勇斌
施志炎
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MECS Chemical Plants Equipment Shanghai Co Ltd
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MECS Chemical Plants Equipment Shanghai Co Ltd
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Publication of WO2018141245A1 publication Critical patent/WO2018141245A1/en
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Classifications

    • 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
    • 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
    • F28F3/046—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 the deformations being linear, e.g. corrugations
    • 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
    • F28F9/04—Arrangements for sealing elements into header boxes or end plates
    • F28F9/16—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling
    • F28F9/18—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling by welding

Definitions

  • the invention relates to the technical field of waste heat recovery energy-saving equipment, in particular to a novel plate type gas-gas heat exchanger, which can be applied to a power station boiler, an industrial heating furnace, a cracking furnace and the like.
  • Heat exchanger heat transfer methods are mainly divided into three types: heat conduction, convection and radiation.
  • the gas heat exchanger is a convection heat conduction method.
  • the process of transferring heat from a higher temperature portion of the object to a lower temperature portion or to another object having a lower temperature in contact with it is called heat conduction, referred to as heat conduction.
  • a gas heat exchanger is a device in which a high temperature gas transfers heat to a space with a low temperature.
  • the gas-fired heat exchangers used in power station boilers are mainly tubular and finned.
  • the flue gas is blown by the fan to achieve heat exchange.
  • Cross-flow heat exchange between flue gas and air is poor heat exchange capacity, requires a large amount of pipe consumption, and has a large area, and since the flue gas and the heat exchange tube are in vertical contact, the flow resistance is increased, the ash is easily accumulated, and the heat exchange tube is worn and added. Large, affecting the life of the air preheater.
  • a conventional heat-exchangers of the plate type is composed of a stamped and formed concave-convex stainless steel plate.
  • the embossed lines between the two phase plates are 180 degrees relative to each other, so that the ridge lines between the two plates of the plate heat exchanger form staggered contact points, and the contact points are vacuum welded to form a contact point.
  • the high-pressure staggered flow structure of the plate heat exchanger, these staggered flow structures make the hot and cold fluid in the plate heat exchanger generate strong turbulence to achieve high heat exchange effect.
  • the plate heat exchanger is composed of a set of corrugated metal plates with four corner holes for the two liquids for heat transfer to pass.
  • the metal sheet is mounted in a frame having a fixed plate and a movable pressing plate on one side and clamped by a clamp bolt.
  • the plates are provided with gaskets that seal the fluid passages and direct fluid flow alternately into the respective flow passages to form a heat exchange.
  • the flow, physical properties, pressure drop and temperature difference of the fluid determine the number and size of the plates.
  • the corrugated sheet not only increases the degree of turbulence, but also forms a number of support points sufficient to withstand the pressure difference between the media.
  • the metal plate and the movable plate pressing plate are suspended from the upper guide bar and are positioned by the lower guide bar, and the rod end is fixed on the support column.
  • the plate type gas-gas heat exchanger has the characteristics of compact structure, small occupied area, high heat transfer efficiency, etc.
  • the conventional plate heat exchanger has a compact structure, the flow path is complicated.
  • the flow resistance on both the flue gas side and the air side is very large, and the flue gas side is easy to accumulate ash to block the flow path.
  • the conventional cryogenic plate heat exchanger requires rubber ring seal, or spring strip compression, or a welded structure, which is not applicable.
  • the object of the present invention is to overcome the shortcomings of the current fin-and-tube type, tubular air preheater or other forms of plate-type gas heat exchangers, such as poor heat exchange capacity, easy ash accumulation and large flow resistance, thereby providing a plate type.
  • the gas-gas heat exchanger has a compact structure and an increased heat exchange area, and the flue gas is of an elliptical straight passage, which reduces the flow resistance on the flue gas side, and is not easy to wear the pipe wall, and is not easy to be ash-blocked. Even if the dust is accumulated, it is easy to clean, the corrugated passage between the air moving plates, the turbulence is enhanced, the heat transfer efficiency is improved, the structure is simple, and the production cost is low.
  • the present invention adopts the following technical solutions:
  • a plate type gas-gas heat exchanger comprises a corrugated plate heat exchange core body, a plate type gas-gas heat exchanger outer casing, a first gas medium inlet and outlet pipe, a second gas medium inlet and outlet pipe; and the corrugated plate heat exchange
  • the core body is disposed in the outer casing of the plate type gas-gas heat exchanger, and the first gas medium inlet and outlet pipes are disposed at upper and lower ends of the corrugated plate heat exchange core body, and the second gas medium is disposed on the left and right sides of the corrugated plate heat exchange core body Export line
  • the corrugated plate is formed by flat stamping to form a flat area, an inner plane area of the sheet and a corrugated area;
  • the corrugated plate heat exchange core body is formed by welding a plurality of sets of plate bundles according to two adjacent plate bundles in a plane region after the corrugated plates are stacked, the peaks are superimposed on the peaks, the troughs are superposed on the troughs, and the inside of the corrugated bundles is formed first.
  • the gas medium-like elliptical tubular passage is formed by stacking two adjacent bundles in a plane region to form a second gas medium shell path.
  • first gas medium-like elliptical straight channel formed inside the bundle is connected to the first gas medium inlet and outlet conduits.
  • the two adjacent bundles are welded to form a second gas medium shell-side passage after being stacked in the plane region, and are in communication with the second gas medium inlet and outlet conduits.
  • first gaseous medium exchanges heat with the second gaseous medium in a cross-flow.
  • first gaseous medium is flue gas and the second gaseous medium is air.
  • the inner part of the corrugated plate is provided with an inner plane area of the plate, and two adjacent plate bundles are stacked by the inner plane area of the plate, which acts as a reinforcing rib to support the entire air preheater structure.
  • the two adjacent corrugated plate heat exchange cores are connected to each other by a welded metal expansion joint.
  • the metal expansion joint absorbs the thermal expansion of the corrugated plate heat exchange core under working conditions.
  • the plate type gas-gas heat exchanger of the present invention takes the flue gas into the elliptical straight passage, has small flow resistance, and is not easily stained with ash, and is easy to be cleaned even if it is ash.
  • the plate type gas-gas heat exchanger of the present invention the plate bundle is welded by its own flat area, no need to add edge strips, the welding amount is small, and the structure is simple.
  • the plate type gas-gas heat exchanger of the invention has small investment cost, low cost, simple production process, and is easy to form a module, and is convenient to install;
  • the plate type gas-gas heat exchanger of the present invention is applicable not only to gas-gas heat exchange but also to gas-liquid and liquid-liquid heat exchange, and can be applied to food, brewing, machinery, chemical, petroleum, power, metallurgy, Heat exchange areas such as electricity and ships.
  • FIG. 1 is a schematic structural view of an embodiment of the present invention.
  • Figure 2 is a front elevational view of a corrugated sheet in the embodiment of the present invention.
  • Figure 3 is a plan view of a corrugated sheet in the embodiment of the present invention.
  • Figure 4 is a schematic view showing the stacking of heat exchange plates in the embodiment of the present invention.
  • Figure 5 is a schematic view showing the connection of the core of the bundle in the embodiment of the present invention.
  • Figure 6 is a waveform diagram of a corrugated plate in the embodiment of the present invention.
  • Figure 7 is a schematic view showing the welding of the air side end plate in the embodiment of the present invention.
  • a plate type gas-gas heat exchanger includes: a corrugated plate heat exchange core body 1, a plate type gas-gas heat exchanger outer casing 2, a flue gas outlet line 3, a flue gas inlet line 3', and an air outlet. Line 4, air outlet line 4'.
  • the corrugated sheet 8 is stamped from a flat plate to form an upper planar zone 9 and a lower planar zone 9', a left planar zone 10 and a right planar zone 10', and a plate inner planar zone 14
  • the corrugated area 11 the corrugation of the corrugated area is composed of an upper corrugation 16 and a lower corrugation 16'
  • the corrugation shape is a hyperbola
  • the bundle 5 is welded by the left plane area 10 and the right plane area 10' to form an elliptical tubular passage 6
  • the upper shell region 9 and the lower plane region 9' are welded to form the air shell path 7
  • the two plate bundles support the air passage between the plates through the inner plane region 14 of the plate to act as a reinforcing rib.
  • the corrugated plate heat exchange core body 1 is formed by stacking a plurality of sets of plate bundles 5 staggered by 1/2 type ellipse, and the corrugated plate piece 8 is formed by stacking the peaks 12 of the crests 12 and the troughs 13 to the troughs 13 .
  • the elliptical tubular passage 6 of the bundle is smoked, and the air shell passage 7 between the two bundles flows air, and the two mediums exchange heat in a cross-flow form, and the two bundles pass through the upper plane 9 and the lower plane 9'
  • the inner plane area 14 of the sheet is welded and stacked to support the structure of the entire plate type gas-gas heat exchanger.
  • the two bundle cores 1 are welded to both sides of the metal expansion joint 15 for modular installation for easy cleaning and inspection.
  • Fig. 7 when the pressure is high, the tube sheets are arranged in two sections on the air side, and a welded joint is adopted between the tube sheets and the bundles.

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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

A plate-type gas-to-gas heat exchanger, comprising: a corrugated plate heat exchange core (1), a plate-type gas-to-gas heat exchanger shell (2), first gas medium inlet/outlet pipelines (3, 3'), and second gas medium inlet/outlet pipelines (4, 4'); the corrugated plate heat exchange core (1) is arranged inside the plate-type gas-to-gas heat exchanger shell (2), the first gas medium inlet/outlet pipelines (3, 3') being arranged on the upper and lower ends of the corrugated plate heat exchange core (1), and the second gas medium inlet/outlet pipelines (4, 4') being arranged on the left and right sides of the corrugated plate heat exchange core (1); the corrugated plate is composed of a planar area (9), a plate inner planar area (14), and a corrugated area (11) formed by flat plate stamping; the corrugated plate heat exchange core (1) is formed by welding together a plurality of sets of plate bundles in two adjacent plate bundles after stacking the corrugated plates in the planar area, the corrugation peaks (12) overlapping the corrugation peaks (12) and the corrugation troughs (13) overlapping the corrugation troughs (13), a first gas medium elliptical tubular channel (6) being formed inside the plate bundles (5), and a second gas medium shell pass channel (7) being formed between two adjacent plate bundles after being stacked in the planar region and welded.

Description

一种板式气气热交换器Plate type gas heat exchanger 技术领域Technical field

本发明涉及余热回收节能设备技术领域，尤其是一种新型板式气气热交换器，可应用于电站锅炉、工业加热炉、裂解炉等。The invention relates to the technical field of waste heat recovery energy-saving equipment, in particular to a novel plate type gas-gas heat exchanger, which can be applied to a power station boiler, an industrial heating furnace, a cracking furnace and the like.

背景技术Background technique

热交换器传热方式主要分为三种：热传导、对流和辐射。气气热交换器是属于对流导热方式， 热量从物体内温度较高的部分传递到温度较低的部分或者传递到与之接触的温度较低的另一物体的过程称为热传导，简称导热。气气热交换器就是温度高的气体传递热量给温度低的空间的设备。Heat exchanger heat transfer methods are mainly divided into three types: heat conduction, convection and radiation. The gas heat exchanger is a convection heat conduction method. The process of transferring heat from a higher temperature portion of the object to a lower temperature portion or to another object having a lower temperature in contact with it is called heat conduction, referred to as heat conduction. A gas heat exchanger is a device in which a high temperature gas transfers heat to a space with a low temperature.

目前电站锅炉所采用的气气热交换器以管式、翅片管式为主。其空气走管内，烟气通过风机吹掠管道从而实现换热。烟气与空气之间采用错流换热。但这种气气热交换器换热能力差，需要消耗大量的管材，占地面积大，而且由于烟气与换热管是垂直接触，导致流阻增加，容易积灰并且换热管磨损加大，影响空气预热器的寿命。At present, the gas-fired heat exchangers used in power station boilers are mainly tubular and finned. In the air pipe, the flue gas is blown by the fan to achieve heat exchange. Cross-flow heat exchange between flue gas and air. However, this gas-heat exchanger has poor heat exchange capacity, requires a large amount of pipe consumption, and has a large area, and since the flue gas and the heat exchange tube are in vertical contact, the flow resistance is increased, the ash is easily accumulated, and the heat exchange tube is worn and added. Large, affecting the life of the air preheater.

传统波纹板式热交换器(heat-exchangers of the plate type)是由冲压成形的凹凸不锈钢板组成。两相临板片之间的凹凸纹路成180度相对组合，因此板式热交换器两板片之间的凹凸脊线形成了交错的接触点，将接触点以真空焊接方式结合后，就形成了板式热交换器的耐高压交错流通结构，这些交错的流通结构使得板式热交换器内的冷热流体产生强烈紊流而达到高换热效果。板式热交换器是由一组波纹金属板组成，板上有四个角孔，供传热的两种液体通过。金属板片安装在一个侧面有固定板和活动压紧板的框架内，并用夹紧螺栓夹紧。板片上装有密封垫片，将流体通道密封，并且引导流体交替地流至各自的流道内，形成热交换。流体的流量，物理性质，压力降和温度差决定了板片的数量和尺寸。波纹板不仅提高了湍流程度，并且形成许多支承点，足以承受介质间的压力差。金属板和活动板压紧板悬挂在上导杆，并由下导杆定位，而杆端则固定在支撑柱上。A conventional heat-exchangers of the plate type is composed of a stamped and formed concave-convex stainless steel plate. The embossed lines between the two phase plates are 180 degrees relative to each other, so that the ridge lines between the two plates of the plate heat exchanger form staggered contact points, and the contact points are vacuum welded to form a contact point. The high-pressure staggered flow structure of the plate heat exchanger, these staggered flow structures make the hot and cold fluid in the plate heat exchanger generate strong turbulence to achieve high heat exchange effect. The plate heat exchanger is composed of a set of corrugated metal plates with four corner holes for the two liquids for heat transfer to pass. The metal sheet is mounted in a frame having a fixed plate and a movable pressing plate on one side and clamped by a clamp bolt. The plates are provided with gaskets that seal the fluid passages and direct fluid flow alternately into the respective flow passages to form a heat exchange. The flow, physical properties, pressure drop and temperature difference of the fluid determine the number and size of the plates. The corrugated sheet not only increases the degree of turbulence, but also forms a number of support points sufficient to withstand the pressure difference between the media. The metal plate and the movable plate pressing plate are suspended from the upper guide bar and are positioned by the lower guide bar, and the rod end is fixed on the support column.

现有技术中，对板式气气热交换器的报道较少，而板式热交换器具有结构紧凑，占地面积小，传热效率高等特点，传统板式热交换器虽然结构紧凑，但是流道复杂，烟气侧与空气侧流动阻力都很大，而且烟气侧易积灰阻塞流道，同时传统低温板式热交换器需要橡胶圈密封、或弹簧条压紧，或采用焊接结构，不适用与高温烟气换热，将传统板式热交换器引入电站作为空气预热器中使用肯定是不适用的，所以需要开发一种新型板式气气热交换器，可应用于电站锅炉、工业加热炉、裂解炉等领域。In the prior art, there are few reports on the plate type gas-gas heat exchanger, and the plate type heat exchanger has the characteristics of compact structure, small occupied area, high heat transfer efficiency, etc., although the conventional plate heat exchanger has a compact structure, the flow path is complicated. The flow resistance on both the flue gas side and the air side is very large, and the flue gas side is easy to accumulate ash to block the flow path. At the same time, the conventional cryogenic plate heat exchanger requires rubber ring seal, or spring strip compression, or a welded structure, which is not applicable. High-temperature flue gas heat transfer, the use of traditional plate heat exchangers into the power station as an air preheater is certainly not applicable, so it is necessary to develop a new type of plate gas heat exchanger, which can be applied to power station boilers, industrial furnaces, Cracking furnaces and other fields.

技术问题technical problem

本发明目的在于为克服现目前翅片管式、管式空气预热器或其它形式的板式气气热交换器的换热能力差，易积灰，流动阻力大这些缺点，从而提供一种板式气气热交换器，该板式气气热交换器具有结构紧凑、换热面积增大，烟气走类椭圆直通道，降低了烟气侧流动阻力，同时不易磨损管壁，不易积灰阻塞，即使积灰也便于清理，空气走板间波纹通道，湍流度增强，提高了传热效率，且结构简单、生产成本低。The object of the present invention is to overcome the shortcomings of the current fin-and-tube type, tubular air preheater or other forms of plate-type gas heat exchangers, such as poor heat exchange capacity, easy ash accumulation and large flow resistance, thereby providing a plate type. The gas-gas heat exchanger has a compact structure and an increased heat exchange area, and the flue gas is of an elliptical straight passage, which reduces the flow resistance on the flue gas side, and is not easy to wear the pipe wall, and is not easy to be ash-blocked. Even if the dust is accumulated, it is easy to clean, the corrugated passage between the air moving plates, the turbulence is enhanced, the heat transfer efficiency is improved, the structure is simple, and the production cost is low.

技术解决方案Technical solution

为实现上述目的，本发明采用以下技术方案：To achieve the above object, the present invention adopts the following technical solutions:

一种板式气气热交换器，包括波纹板换热芯体、板式气气热交换器外壳、第一气体介质进出口管路、第二气体介质进出口管路；所述的波纹板换热芯体设于板式气气热交换器外壳内，波纹板换热芯体的上下端设有第一气体介质进出口管路，波纹板换热芯体的左右两侧设有第二气体介质进出口管路； A plate type gas-gas heat exchanger comprises a corrugated plate heat exchange core body, a plate type gas-gas heat exchanger outer casing, a first gas medium inlet and outlet pipe, a second gas medium inlet and outlet pipe; and the corrugated plate heat exchange The core body is disposed in the outer casing of the plate type gas-gas heat exchanger, and the first gas medium inlet and outlet pipes are disposed at upper and lower ends of the corrugated plate heat exchange core body, and the second gas medium is disposed on the left and right sides of the corrugated plate heat exchange core body Export line

所述波纹板是由平板冲压形成平面区、板片内部平面区和波纹区组成；The corrugated plate is formed by flat stamping to form a flat area, an inner plane area of the sheet and a corrugated area;

所述波纹板换热芯体由多组板束按照两相邻板束以波纹板在平面区叠放后焊接在一起的形式，波峰对波峰叠加，波谷对波谷叠加，板束内部形成第一气体介质类椭圆管状通道，两相邻板束之间在平面区叠放后焊接形成第二气体介质壳程通道。The corrugated plate heat exchange core body is formed by welding a plurality of sets of plate bundles according to two adjacent plate bundles in a plane region after the corrugated plates are stacked, the peaks are superimposed on the peaks, the troughs are superposed on the troughs, and the inside of the corrugated bundles is formed first. The gas medium-like elliptical tubular passage is formed by stacking two adjacent bundles in a plane region to form a second gas medium shell path.

进一步的，所述板束内部形成的第一气体介质类椭圆直通道，是与第一气体介质进、出口管路连通。Further, the first gas medium-like elliptical straight channel formed inside the bundle is connected to the first gas medium inlet and outlet conduits.

进一步的，所述两相邻板束之间在平面区叠放后焊接形成第二气体介质壳程通道，是与第二气体介质进、出口管路连通。Further, the two adjacent bundles are welded to form a second gas medium shell-side passage after being stacked in the plane region, and are in communication with the second gas medium inlet and outlet conduits.

进一步的，第一气体介质与第二气体介质错流交换热量。Further, the first gaseous medium exchanges heat with the second gaseous medium in a cross-flow.

进一步的，所述第一气体介质是烟气，第二气体介质是空气。Further, the first gaseous medium is flue gas and the second gaseous medium is air.

进一步的，波纹板内部设有板片内部平面区，两相邻板束通过板片内部平面区叠放，起到加强筋的作用，支撑整个空预器结构。Further, the inner part of the corrugated plate is provided with an inner plane area of the plate, and two adjacent plate bundles are stacked by the inner plane area of the plate, which acts as a reinforcing rib to support the entire air preheater structure.

进一步的，两相邻波纹板换热芯体之间通过焊接金属膨胀节互相连接。该金属膨胀节可在工作状态下吸收波纹板换热芯体的热膨胀。Further, the two adjacent corrugated plate heat exchange cores are connected to each other by a welded metal expansion joint. The metal expansion joint absorbs the thermal expansion of the corrugated plate heat exchange core under working conditions.

有益效果Beneficial effect

本发明优点是：The advantages of the invention are:

（1）克服了目前管式、管翅式空气热交换器的缺点，换热效率大幅提高，结构紧凑，占地面积小，耐高温高压，使用寿命长；(1) Overcoming the shortcomings of the current tubular and tube-fin air heat exchangers, the heat exchange efficiency is greatly improved, the structure is compact, the floor space is small, high temperature and high pressure resistance, and the service life is long;

（2）本发明板式气气热交换器烟气走椭圆直通道，流动阻力小，而且不易沾灰即使沾灰也很容易清灰。(2) The plate type gas-gas heat exchanger of the present invention takes the flue gas into the elliptical straight passage, has small flow resistance, and is not easily stained with ash, and is easy to be cleaned even if it is ash.

（3）本发明板式气气热交换器，板束通过自身平面区焊接，无需添加边条，焊接量小，结构简单。(3) The plate type gas-gas heat exchanger of the present invention, the plate bundle is welded by its own flat area, no need to add edge strips, the welding amount is small, and the structure is simple.

（4）本发明板式气气热交换器，投资成本小，成本低，生产工艺简单，并且易于组成模块，安装方便；(4) The plate type gas-gas heat exchanger of the invention has small investment cost, low cost, simple production process, and is easy to form a module, and is convenient to install;

（5）本发明板式气气热交换器，不仅适用气-气换热，也适用于气-液、液-液换热，可以应用于食品、酿造、机械、化工、石油、动力、冶金、电力、船舶等热交换领域。(5) The plate type gas-gas heat exchanger of the present invention is applicable not only to gas-gas heat exchange but also to gas-liquid and liquid-liquid heat exchange, and can be applied to food, brewing, machinery, chemical, petroleum, power, metallurgy, Heat exchange areas such as electricity and ships.

附图说明DRAWINGS

图1 本发明实施例中结构示意图。FIG. 1 is a schematic structural view of an embodiment of the present invention.

图2 本发明实施例中波纹板片主视图。Figure 2 is a front elevational view of a corrugated sheet in the embodiment of the present invention.

图3 本发明实施例中波纹板片俯视图。Figure 3 is a plan view of a corrugated sheet in the embodiment of the present invention.

图4 本发明实施例中换热板束叠放示意图。Figure 4 is a schematic view showing the stacking of heat exchange plates in the embodiment of the present invention.

图5 本发明实施例中板束芯体连接示意图。Figure 5 is a schematic view showing the connection of the core of the bundle in the embodiment of the present invention.

图6 本发明实施例中波纹板片波形形状图。Figure 6 is a waveform diagram of a corrugated plate in the embodiment of the present invention.

图7 本发明实施例中空气侧端板焊接示意图。Figure 7 is a schematic view showing the welding of the air side end plate in the embodiment of the present invention.

附图标注：The drawing is marked with:

1-波纹板换热芯体； 1-corrugated plate heat exchange core;

2-板式气气热交换器外壳；2-plate gas heat exchanger housing;

3-烟气出口管路； 3-flue gas outlet line;

4-空气出口管路；4-air outlet line;

3´-烟气进口管路； 3 ́-flue gas inlet pipe;

4´-空气进口管路；4 ́-air inlet line;

5-板束； 5-plate bundle;

6-类椭圆管状通道；6-class elliptical tubular passage;

7-空气壳程通道； 7-air shell path;

8-波纹板片；8-corrugated sheet;

9-上平面区，9-upper plane area,

9´-下平面区；9 ́-lower flat area;

10-左平面区；10-left plane area;

10´-右平面区； 10 ́-right plane area;

11-波纹区；11-corrugated area;

12-波峰；                12-peak;

13-波谷；13-wave valley;

14-板片内部平面区； 14-plate inner plane area;

15-金属膨胀节；15-metal expansion joint;

16-上波纹，16-up ripple,

16’-下波纹；16'-low ripple;

17-板束与管板之间的焊缝。17- Weld between the bundle and the tube sheet.

本发明的最佳实施方式BEST MODE FOR CARRYING OUT THE INVENTION

下面结合附图和实施例进一步说明本发明。The invention is further illustrated by the following figures and examples.

参照图1，一种板式气气热交换器，包括：包括波纹板换热芯体1、板式气气热交换器外壳2、烟气出口管路3，烟气进口管路3'、空气出口管路4，空气出口管路4'。参照图2、图3和图6，波纹板片8是由平板冲压而成，形成上平面区9和下平面区9'，左平面区10和右平面区10'，板片内部平面区14和波纹区11，波纹区的波纹由上波纹16和下波纹16’组成，波纹形状为双曲线，板束5通过左平面区10和右平面区10'对叠焊接形成类椭圆管状通道6，两板束之间通过上平面区9和下平面区9'，焊接形成空气壳程通道7，同时两板束之间通过板片内部平面区14支撑板间空气通道，起到加强筋的作用。参考图4，波纹板换热芯体1由多组板束5错开1/2类椭圆叠放而成，波纹板片8通过波峰12对波峰12，波谷13对波谷13的位置叠放而成。板束的类椭圆管状通道6走烟气，两板束间空气壳程通道7流通空气，两种介质成错流的形式交换热量，两板束间通过上平面区9和下平面区9'、板片内部平面区14进行焊接叠放，起到支撑整个板式气气热交换器结构的作用。参照图5，两板束芯体1通过焊接在金属膨胀节15的两侧，用于模块化安装，便于清洗检修。参照图7，压力较高时，空气侧两段设置管板，管板与板束之间采用焊接连接。Referring to Fig. 1, a plate type gas-gas heat exchanger includes: a corrugated plate heat exchange core body 1, a plate type gas-gas heat exchanger outer casing 2, a flue gas outlet line 3, a flue gas inlet line 3', and an air outlet. Line 4, air outlet line 4'. Referring to Figures 2, 3 and 6, the corrugated sheet 8 is stamped from a flat plate to form an upper planar zone 9 and a lower planar zone 9', a left planar zone 10 and a right planar zone 10', and a plate inner planar zone 14 And the corrugated area 11, the corrugation of the corrugated area is composed of an upper corrugation 16 and a lower corrugation 16', the corrugation shape is a hyperbola, and the bundle 5 is welded by the left plane area 10 and the right plane area 10' to form an elliptical tubular passage 6, Between the two plate bundles, the upper shell region 9 and the lower plane region 9' are welded to form the air shell path 7 , and the two plate bundles support the air passage between the plates through the inner plane region 14 of the plate to act as a reinforcing rib. . Referring to FIG. 4, the corrugated plate heat exchange core body 1 is formed by stacking a plurality of sets of plate bundles 5 staggered by 1/2 type ellipse, and the corrugated plate piece 8 is formed by stacking the peaks 12 of the crests 12 and the troughs 13 to the troughs 13 . The elliptical tubular passage 6 of the bundle is smoked, and the air shell passage 7 between the two bundles flows air, and the two mediums exchange heat in a cross-flow form, and the two bundles pass through the upper plane 9 and the lower plane 9' The inner plane area 14 of the sheet is welded and stacked to support the structure of the entire plate type gas-gas heat exchanger. Referring to Figure 5, the two bundle cores 1 are welded to both sides of the metal expansion joint 15 for modular installation for easy cleaning and inspection. Referring to Fig. 7, when the pressure is high, the tube sheets are arranged in two sections on the air side, and a welded joint is adopted between the tube sheets and the bundles.

Claims (9)

一种板式气气热交换器，包括波纹板换热芯体、板式气气热交换器外壳、第一气体介质进出口管路、第二气体介质进出口管路；所述的波纹板换热芯体设于板式气气热交换器外壳内，波纹板换热芯体的上下端设有第一气体介质进出口管路，波纹板换热芯体的左右两侧设有第二气体介质进出口管路；其特征在于，A plate type gas-gas heat exchanger comprises a corrugated plate heat exchange core body, a plate type gas-gas heat exchanger outer casing, a first gas medium inlet and outlet pipe, a second gas medium inlet and outlet pipe; and the corrugated plate heat exchange The core body is disposed in the outer casing of the plate type gas-gas heat exchanger, and the first gas medium inlet and outlet pipes are disposed at upper and lower ends of the corrugated plate heat exchange core body, and the second gas medium is disposed on the left and right sides of the corrugated plate heat exchange core body An outlet line; characterized in that 所述波纹板是由平板冲压形成平面区、板片内部平面区和波纹区组成；The corrugated plate is formed by flat stamping to form a flat area, an inner plane area of the sheet and a corrugated area; 所述波纹板换热芯体由多组板束按照两相邻板束以波纹板在平面区叠放后焊接在一起的形式，波峰对波峰叠加，波谷对波谷叠加，板束内部形成第一气体介质类椭圆管状通道，两相邻板束之间在平面区叠放后焊接形成第二气体介质壳程通道。The corrugated plate heat exchange core body is formed by welding a plurality of sets of plate bundles according to two adjacent plate bundles in a plane region after the corrugated plates are stacked, the peaks are superimposed on the peaks, the troughs are superposed on the troughs, and the inside of the corrugated bundles is formed first. The gas medium-like elliptical tubular passage is formed by stacking two adjacent bundles in a plane region to form a second gas medium shell path. 根据权利要求1所述的一种板式气气热交换器，其特征在于，所述板束内部形成的第一气体介质类椭圆直通道，是与第一气体介质进、出口管路连通。A plate type gas-gas heat exchanger according to claim 1, wherein the first gas medium-like elliptical straight passage formed inside the bundle is in communication with the first gas medium inlet and outlet conduits. 根据权利要求1所述的一种板式气气热交换器，其特征在于，所述两相邻板束之间在平面区叠放后焊接形成第二气体介质壳程通道，是与第二气体介质进、出口管路连通。The plate type gas-gas heat exchanger according to claim 1, wherein the two adjacent plate bundles are welded after being stacked in a plane region to form a second gas medium shell path, which is a second gas The medium inlet and outlet pipes are connected. 根据权利要求1所述的一种板式气气热交换器，其特征在于，第一气体介质与第二气体介质错流交换热量。A plate type gas-gas heat exchanger according to claim 1, wherein the first gaseous medium exchanges heat with the second gaseous medium in a cross-flow. 根据权利要求1所述的一种板式气气热交换器，其特征在于，所述第一气体介质是烟气，第二气体介质是空气。A plate type gas-gas heat exchanger according to claim 1, wherein said first gaseous medium is flue gas and said second gaseous medium is air. 根据权利要求1所述的一种板式气气热交换器，其特征在于，波纹板内部设有板片内部平面区，两相邻板束通过板片内部平面区叠放，起到加强筋的作用，支撑整个空预器结构。A plate type gas-gas heat exchanger according to claim 1, wherein the corrugated plate is provided with an inner flat area of the plate, and two adjacent plate bundles are stacked by the inner plane of the plate to serve as a reinforcing rib. Function to support the entire air preheater structure. 根据权利要求1所述的一种板式气气热交换器，其特征在于，两相邻波纹板换热芯体之间通过焊接金属膨胀节互相连接。A plate type gas-gas heat exchanger according to claim 1, wherein two adjacent corrugated plate heat exchange cores are connected to each other by a welded metal expansion joint. 根据权利要求1所述的一种板式气气热交换器，其特征在于，波纹板的波纹是由一系列曲率相同双曲线相连而成。A plate type gas-gas heat exchanger according to claim 1, wherein the corrugations of the corrugated plates are formed by a series of hyperbolic curves having the same curvature. 根据权利要求1所述的一种板式气气热交换器，其特征在于，烟气侧短板面设置有管板，每一层板束均与管板焊接在一起。A plate type gas-gas heat exchanger according to claim 1, wherein the flue gas side short plate surface is provided with a tube sheet, and each layer of the sheet bundle is welded to the tube sheet.
PCT/CN2018/074764 2017-02-03 2018-01-31 Plate-type gas-to-gas heat exchanger Ceased WO2018141245A1 (en)

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