A corrugated plate type gas heat exchanger

Abstract

The present invention relates to the technical field of heat exchangers, and discloses a corrugated plate type gas heat exchanger, comprising a plurality of heat exchange plates connected in sequence, each of the heat exchange plates comprising a first corrugated plate, a second corrugated plate, a metal end face flange, and a first guide plate and a second guide plate located between the first corrugated plate and the second corrugated plate, a metal end face flange is arranged on the upper side of the heat exchange plate, the metal end face flanges on the corresponding sides of a plurality of heat exchange plates are nested and connected in sequence to respectively form a heat exchange channel one and a heat exchange channel two, and adjacent heat exchange plates are stacked to form a heat exchange channel three, the first corrugated plate and the second corrugated plate are curved convex wave-shaped plates, and two corrugated plates in the heat exchange plate of the present invention are stacked to form an S-shaped internal heat exchange channel, and the heat exchange fluid flows in a staggered manner in the channel, thereby increasing the contact area between the fluid and the heat exchange plate, and the second fixed flange is connected to a plurality of metal end face flanges to form a guide heat exchange channel, so that the heat exchange effect is better.

Description

Technical Field

[0001] The present application relates to the technical field of heat exchangers, and in particular to a corrugated plate type gas heat exchanger. Background Art

[0002] Gas heat exchangers are efficient and environmentally friendly and are widely used in the industrial field. Gas heat exchangers use gas as a heat medium to transfer heat energy from one fluid to another to achieve heat exchange. The operating temperature of traditional gas plate heat exchangers is relatively low, generally not exceeding 500 degrees Celsius; the gas pressure on both sides of the heat exchange is required to be close, otherwise it is easy to cause the plates to bulge and deform. Traditional liquid plate heat exchangers are sealed with sealing strips and are only suitable for liquids below 300 degrees Celsius. If it is used above 300 degrees Celsius, the brazing process is used between the plates. The disadvantage of this process is that it cannot be disassembled and cleaned after clogging. For this reason, we provide a corrugated plate high temperature and high pressure metal end face sealed gas heat exchanger.

[0003] The information disclosed in this background technology section is only intended to enhance the understanding of the overall background of the application and should not be regarded as an admission or any form of suggestion that the information constitutes the prior art already known to ordinary technicians in the field. Summary of the invention

[0004] The object of the present invention is to provide a corrugated plate gas heat exchanger with a simple structure, high strength, capable of realizing high-temperature and high-pressure gas heat exchange, easy to assemble and disassemble, convenient to clean, and high heat exchange efficiency.

[0005] In order to achieve the above objectives, this application is implemented by adopting the following technical solutions:

[0006] A corrugated plate type gas heat exchanger, comprising a plurality of heat exchange plates connected in sequence, each of the heat exchange plates comprising a first corrugated plate, a second corrugated plate, a metal end face flange, and a first guide plate and a second guide plate located between the first corrugated plate and the second corrugated plate, a metal end face flange is respectively arranged on both sides of the upper end of the heat exchange plate, the metal end face flanges on the corresponding sides of the plurality of heat exchange plates are nested and connected in sequence to form a heat exchange channel 1 and a heat exchange channel 2 respectively, the adjacent heat exchange plates are stacked to form a heat exchange channel 3, and the first corrugated plate and the second corrugated plate are stacked to form an internal heat exchange channel;

[0007] The first corrugated plate and the second corrugated plate are curved convex wave-shaped plates, the first guide plate and the second guide plate are respectively arranged on two corresponding sides between the first corrugated plate and the second corrugated plate, the first guide plate is used to connect the heat exchange channel 1 with the internal heat exchange channel, and the second guide plate is used to connect the heat exchange channel 2 with the internal heat exchange channel;

[0008] A third guide vane and a fourth guide vane are arranged between adjacent heat exchange plates, and the third guide vane and the fourth guide vane are used to connect the heat exchange channel three.

[0009] Optionally, a ventilation slot is provided on one side of the metal end face flange close to the first corrugated plate sheet and the second corrugated plate sheet.

[0010] Optionally, a fastening assembly is further included, and the metal end face flanges at both ends of the upper sides of several heat exchange plates are fastened and connected respectively through the fastening assembly.

[0011] Optionally, the fastening assembly includes a first fixing flange, a second fixing flange and a screw, the first fixing flange and the second fixing flange are respectively arranged at both ends of the nested metal end face flanges, the screw passes through the corresponding screw holes on the first fixing flange and the second fixing flange in turn, and is equipped with a clamping nut to fasten the metal end face flanges.

[0012] Optionally, a movable spring is arranged between the first fixing flange, the second fixing flange and the clamping nut.

[0013] Optionally, the second fixing flange is a blind flange used for setting up a fluid channel and providing structural strength support.

[0014] Optionally, the first guide plate and the second guide plate are twill-patterned.

[0015] Optionally, the third guide vane and the fourth guide vane are transverse stripes.

[0016] Optionally, a plurality of the heat exchange plates are stacked, the first corrugated plate and the second corrugated plate have an amplitude ≥1.5 mm, a wave pitch ≥2 mm, and the first corrugated plate and the second corrugated plate can have a maximum of 50 wavelengths within every 100 mm.

[0017] Optionally, a cooling channel is provided inside the screw, a cooling sleeve is provided outside the screw, and the cooling sleeve is provided with an air inlet for cold air to be heated for cooling.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The heat exchange plate of the present invention is designed to be a curved convex corrugated shape. The first corrugated plate and the second corrugated plate are stacked to form an internal heat exchange channel. The adjacent heat exchange plates are stacked to form a heat exchange channel three. In this way, when the heat exchange gas passes through the flow channel, the resistance is reduced, the heat exchange area is increased, and the structural strength of the plate is improved, so that the pressure difference on both sides of the plate can reach more than 15 bar and still work. In addition, with the heat exchange channel one and the heat exchange channel two, multiple channels are connected for heat exchange, which increases the heat exchange efficiency;

[0020] 2. The first corrugated plate and the second corrugated plate adopt a low-amplitude and high-density corrugated plate design, which improves the material strength to avoid deformation when the fluid passes through, while reducing the plate thickness to increase the heat exchange efficiency;

[0021] 3. The present invention adopts an independent plate structure design. Each independent heat exchange plate is provided with two metal end face flanges. Each heat exchange plate is nested by the metal end face flanges to achieve metal sealing, solve the thermal expansion and contraction during the heat exchange process, and provide expansion and contraction space for each independent plate, thereby avoiding thermal stress damage during the heat exchange process; and this structure is simple to operate during installation and easy to disassemble for cleaning and maintenance;

[0022] 4. The second fixed flange is set as a blind flange, which is connected with several metal end flanges to form a guide heat exchange channel. The blind flange plays a role in setting up the fluid channel and supporting the structural strength, thereby increasing the heat exchange efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present disclosure or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 It is a schematic diagram of the overall structure of a corrugated plate type gas heat exchanger provided by an embodiment of the present invention;

[0025] Figure 2 It is a schematic diagram of the overall structure of a heat exchange plate provided by an embodiment of a corrugated plate type gas heat exchanger of the present invention;

[0026] Figure 3 It is a structural schematic diagram of a heat exchange plate provided by an embodiment of a corrugated plate type gas heat exchanger of the present invention;

[0027] Figure 4 It is a schematic diagram of assembling two heat exchange plates provided in an embodiment of a corrugated plate type gas heat exchanger of the present invention.

[0028] Markings in the figure are: 1. first corrugated plate; 2. second corrugated plate; 3. first guide vane; 4. second guide vane; 5. third guide vane; 6. fourth guide vane; 7. heat exchange plate; 8. metal end face flange; 9. first fixed flange; 10. second fixed flange; 11. screw; 12. locking nut; 13. heat exchange channel one; 14. heat exchange channel two; 15. cooling channel; 16. ventilation slot. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present application and its application or use.

[0030] Embodiment 1

[0031] A corrugated plate type gas heat exchanger, such as Figure 1 , Figure 3 and Figure 4 As shown, it includes a plurality of heat exchange plates 7 connected in sequence, each heat exchange plate 7 includes a first corrugated plate 1, a second corrugated plate 2, a metal end face flange 8, and a first guide plate 3 and a second guide plate 4 located between the first corrugated plate 1 and the second corrugated plate 2, a metal end face flange 8 is respectively arranged at both ends of the upper side of the heat exchange plate 7, the metal end face flanges 8 on the corresponding sides of a plurality of heat exchange plates 7 are nested and connected in sequence to form a heat exchange channel 1 13 and a heat exchange channel 2 14 respectively, and the adjacent heat exchange plates 7 are stacked to form a heat exchange channel 3, the first corrugated plate 1 and the second corrugated plate 2 in the heat exchange plate are stacked to form an internal heat exchange channel, the first corrugated plate 1 and the second corrugated plate 2 are curved convex wave-shaped plates, the first guide plate 3 and the second guide plate 4 are respectively arranged on two corresponding sides between the first corrugated plate 1 and the second corrugated plate 2, the first guide plate 3 is used to connect the heat exchange channel 1 13 and the internal heat exchange channel, and the second guide plate 4 is used to connect the The heat exchange channel 2 14 and the internal heat exchange channel, the third guide plate 5 and the fourth guide plate 6 are arranged between the adjacent heat exchange plates 7, and the third guide plate 5 and the fourth guide plate 6 are used to connect the heat exchange channel 3. The heat exchange plate 7 is designed to be a curved convex corrugated shape, so that when the heat exchange gas passes through the flow channel, the resistance is reduced, the heat exchange area is increased, and the structural strength of the plate is improved, so that the plate can still work when the pressure difference on both sides reaches more than 15 bar, and with the heat exchange channel 1 and the heat exchange channel 2, multiple channels are connected for heat exchange, which increases the heat exchange efficiency. An independent plate body structure design is adopted, and each independent heat exchange plate 7 is provided with two metal end face flanges 8. Each heat exchange plate 7 is nested by the metal end face flanges 8 to achieve metal sealing, which solves the thermal expansion and contraction during the heat exchange process and provides expansion space for each independent plate, thereby avoiding thermal stress damage during the heat exchange process; and this structure is simple to install and easy to disassemble during cleaning and maintenance.

[0032] like Figure 2 As shown, a ventilation slot 16 is provided on one side of the metal end face flange 8 close to the first corrugated plate sheet 1 and the second corrugated plate sheet 2, and gas enters from the ventilation slot 16 of one metal end face flange 8 and is discharged from the ventilation slot of the other metal end face flange 8.

[0033] like Figure 1 As shown, the metal end face flanges 8 on both sides of the upper ends of several heat exchange plates 7 are fastened and connected respectively by fastening components, and the fastening components include a first fixing flange 9, a second fixing flange 10 and a screw 11. The first fixing flange 9 and the second fixing flange 10 are respectively arranged at both ends of the nested metal end face flanges 8, and the screw 11 passes through the corresponding screw holes on the first fixing flange 9 and the second fixing flange 10 in turn, and is equipped with a clamping nut 12 to fasten the metal end face flanges 8. The metal end face flanges 8 are fastened by the fastening components, so that the connection between the heat exchange plates 7 is also more stable.

[0034] like Figure 1 As shown, a movable spring is arranged between the first fixing flange 9, the second fixing flange 10 and the clamping nut 12, so as to compensate for the elastic deformation generated during the heat exchange process and effectively prevent loosening.

[0035] like Figure 1 As shown, the second fixing flange 10 is a blind flange used for setting up a fluid channel and supporting structural strength, thereby increasing heat exchange efficiency.

[0036] like Figure 3 As shown, the first guide plate 3 and the second guide plate 4 are diagonal lines, the purpose of which is to guide the gas flowing through the internal heat exchange channel formed by stacking the first corrugated plate sheet 1 and the second corrugated plate sheet 2.

[0037] like Figure 4 As shown, the third guide vane 5 and the fourth guide vane 6 are horizontal stripes, and their function is to guide the gas flowing through the heat exchange channel 3 formed by stacking two independent heat exchange plates 7.

[0038] like Figure 1 and Figure 2 As shown, a plurality of heat exchange plates 7 are stacked, the first corrugated plate 1 and the second corrugated plate 2 have an amplitude ≥1.5mm, a wave pitch ≥2mm, and the first corrugated plate 1 and the second corrugated plate 2 can reach a maximum of 50 wavelengths per 100 mm. The first corrugated plate 1 and the second corrugated plate 2 adopt a low-amplitude and high-density corrugated plate design, which improves the material strength to avoid deformation when the fluid passes through, while reducing the plate thickness to increase the heat exchange efficiency.

[0039] like Figure 1 As shown, the first corrugated plate sheet 1 and the second corrugated plate sheet 2 are fixedly connected to the metal end face flange 8 by welding, so as to ensure a stable connection between the two at high temperature.

[0040] Embodiment 2

[0041] Based on Example 1, an implementation method of a corrugated plate gas heat exchanger is provided:

[0042] like Figure 1As shown, the surface of the heat exchange plate 7 is provided with a nano coating, the first guide vane, the second guide vane, the third guide vane and the fourth guide vane are labyrinth seal flow equalization structures, a cooling channel 15 is provided inside the screw 11, and a cooling sleeve is provided outside the screw 11, and the cooling sleeve is provided with an air inlet for cold air to be heated for cooling.

[0043] Different from the first embodiment, a nano-coating is used on the surface to avoid direct contact between the heat exchange plate 7 material and oxygen during the heat exchange process, thereby avoiding thermal oxidation corrosion at high temperatures. The guide vane is designed as a labyrinth seal flow-balancing structure to form multiple throttling gaps and expansion cavities, so that the sealing medium produces a throttling effect and kinetic energy dissipation when passing through, thereby reducing leakage, reducing gas flow resistance, making the airflow distribution more uniform, and improving heat exchange efficiency. A cooling channel is set inside the screw 11. During high-temperature heat exchange, low-temperature cold air to be heated enters the cooling channel 15 inside the screw through the air inlet of the cooling sleeve to accelerate material cooling and maintain a low-temperature state, thereby reducing the possibility of damage to the device.

[0044] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only used to explain the relative position relationship, movement, etc. between the components in a certain posture. If the specific posture changes, the directional indication will also change accordingly. It is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present application.

[0045] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood by specific circumstances.

[0046] The above is only a preferred implementation of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A corrugated plate type gas heat exchanger, characterized in that: The invention comprises a plurality of heat exchange plates (7) connected in sequence, each of the heat exchange plates (7) comprising a first corrugated plate (1), a second corrugated plate (2), a metal end face flange (8), and a first guide plate (3) and a second guide plate (4) located between the first corrugated plate (1) and the second corrugated plate (2), a metal end face flange (8) being provided at both ends of the upper side of the heat exchange plate (7), the metal end face flanges (8) on the corresponding sides of the plurality of heat exchange plates (7) being nested and connected in sequence to form a heat exchange channel 1 (13) and a heat exchange channel 2 (14), respectively, and the adjacent heat exchange plates (7) are provided with a plurality of heat exchange channels (13) and a heat exchange channel 2 (14). The first corrugated plate (1) and the second corrugated plate (2) are stacked to form a heat exchange channel three; the first corrugated plate (1) and the second corrugated plate (2) are stacked to form an internal heat exchange channel, the first corrugated plate (1) and the second corrugated plate (2) are curved convex wave-shaped plates, the first guide plate (3) and the second guide plate (4) are respectively arranged on two corresponding sides between the first corrugated plate (1) and the second corrugated plate (2), the first guide plate (3) is used to connect the heat exchange channel one (13) and the internal heat exchange channel, and the second guide plate (4) is used to connect the heat exchange channel two (14) and the internal heat exchange channel; A third guide plate (5) and a fourth guide plate (6) are provided between adjacent heat exchange plates (7), and the third guide plate (5) and the fourth guide plate (6) are used to connect heat exchange channel three; It also includes a fastening assembly, through which the metal end face flanges (8) on both sides of the upper ends of the plurality of heat exchange plates (7) are fastened and connected respectively; The fastening assembly comprises a first fixing flange (9), a second fixing flange (10) and a screw (11); the first fixing flange (9) and the second fixing flange (10) are respectively arranged at two ends of a nested metal end face flange (8); the screw (11) passes through corresponding screw holes on the first fixing flange (9) and the second fixing flange (10) in sequence, and is provided with a clamping nut (12) to fasten the metal end face flange (8); A plurality of the heat exchange plates (7) are stacked, the first corrugated plate (1) and the second corrugated plate (2) have an amplitude ≥1.5 mm and a wave pitch ≥2 mm, and the first corrugated plate (1) and the second corrugated plate (2) can have a maximum of 50 wavelengths within every 100 mm.

2. The corrugated plate type gas heat exchanger according to claim 1, characterized in that: A ventilation notch (16) is provided on one side of the metal end face flange (8) close to the first corrugated plate sheet (1) and the second corrugated plate sheet (2).

3. The corrugated plate type gas heat exchanger according to claim 1, characterized in that: A movable spring is provided between the first fixing flange (9), the second fixing flange (10) and the clamping nut (12).

4. The corrugated plate type gas heat exchanger according to claim 1, characterized in that: The second fixed flange (10) is a blind flange used for setting up a fluid channel and providing structural strength support.

5. The corrugated plate type gas heat exchanger according to claim 1, characterized in that: The first guide plate (3) and the second guide plate (4) are twill-patterned.

6. The corrugated plate type gas heat exchanger according to claim 1, characterized in that: The third guide plate (5) and the fourth guide plate (6) are transverse stripes.

7. The corrugated plate type gas heat exchanger according to claim 4, characterized in that: A cooling channel (15) is provided inside the screw (11), a cooling sleeve is provided outside the screw (11), and the cooling sleeve is provided with an air inlet for cold air to be heated for cooling.

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