Horizontal spiral plate heat exchanger with large-flow strong disturbance mixing channel

Abstract

The horizontal spiral plate heat exchanger with a large-flow strong disturbance mixing flow channel comprises a cylindrical body, an end cover, a spiral plate heat exchanger and a split-range baffle, the spiral plate heat exchanger has upper and lower cylindrical cavities symmetrically distributed on the upper and lower sides of the central baffle and first and second spiral flow channels wrapped outside the upper and lower cylindrical cavities, and the split-range baffle divides the cavity on the left side of the spiral plate heat exchanger in the cylindrical body into equal-sized upper and lower cavities; the left end of the upper cylindrical cavity is communicated with the upper cavity and the right end is sealed, the left end of the lower cylindrical cavity is sealed, the left and right ends of the first spiral flow channel are both sealed, the right end of the second spiral flow channel is sealed and the left end is open, and during heat exchange, the second medium can be divided into two parts with different flow directions to enter the second spiral flow channel and form a collision to increase disturbance, thereby reducing the boundary layer effect, improving the heat exchange efficiency, and being applicable to horizontal heat exchange, large processing capacity, easy cleaning, no heat exchange dead zone and good heat exchange effect.

Description

Technical Field

[0001] This invention relates to the field of heat exchange technology, and specifically to a horizontal spiral plate heat exchanger with a high-flow-rate, highly turbulent mixing channel. Background Technology

[0002] Existing spiral plate heat exchangers can be divided into two main categories according to their heat transfer methods: counter-current heat transfer and cross-current heat transfer. The former mostly uses spiral channels and is suitable for heat transfer of media without phase change, while the latter mostly uses a spiral channel on one side and a longitudinal through channel on the other side, which is suitable for heat transfer of media that can be condensed or evaporated. However, both of these heat transfer methods are single heat transfer methods and cannot achieve the combination of counter-current heat transfer and cross-current heat transfer. They are difficult to adapt to heat transfer processes that have both heat transfer without phase change (sensible heat transfer) and heat transfer of condensation and evaporation (latent heat transfer), resulting in poor heat transfer effect and high energy consumption.

[0003] To address this issue, spiral plate heat exchangers capable of both counter-current and cross-current heat transfer have emerged on the market. Chinese patents CN208059646U and CN109945702B disclose such spiral plate heat exchangers. However, the former's vapor phase evaporation end cap contains only a single channel, and the perforated end plate at the upper end of its second cylindrical cavity is only for steam outflow, preventing the flow of steam before and after heat exchange within the vapor phase evaporation end cap. It is only suitable for vertical configurations, and the upper end of the integrated flow channel formed by the first spiral channel and the second cylindrical cavity is only partially open, significantly limiting heat exchange efficiency. The latter's central cylindrical body occupies a large space, which is an unusable heat exchange dead zone, resulting in low heat exchange efficiency. Furthermore, steam can only enter the spiral channel from a single direction, and once inside, it cannot generate strong disturbances, easily forming a stable boundary layer, thus preventing further improvement in heat exchange efficiency. Summary of the Invention

[0004] The purpose of this invention is to overcome one or more disadvantages in the prior art and provide a horizontal spiral plate heat exchanger with a large flow rate and strong disturbance mixing channel.

[0005] To achieve the above objectives, the technical solution provided by this invention is a horizontal spiral plate heat exchanger with a large flow rate and strong turbulence mixing channel, comprising:

[0006] A cylindrical body, wherein the axis of the cylindrical body extends horizontally in the left-right direction;

[0007] An end cap, which is connected to the left end of the cylindrical body, is used to seal the left side opening of the cylindrical body;

[0008] A spiral plate heat exchanger is coaxially disposed within a cylindrical body. The spiral plate heat exchanger includes a central partition extending horizontally and passing through the axis of the cylindrical body, and spiral heat exchange plates connected to both sides of the central partition and extending outward alternately in a spiral pattern. The outermost spiral heat exchange plate is sealed to the inner wall of the cylindrical body, giving the spiral plate heat exchanger an upper cylindrical cavity and a lower cylindrical cavity symmetrically distributed on the upper and lower sides of the central partition, as well as a first spiral flow channel and a second spiral flow channel surrounding the upper and lower cylindrical cavities. The inner side of the first spiral flow channel communicates with the lower cylindrical cavity, and the inner side of the second spiral flow channel communicates with the upper cylindrical cavity.

[0009] A partition plate is located on the left side of the spiral plate heat exchanger. The partition plate extends horizontally and passes through the axis of the cylindrical body. The left end of the partition plate is sealed to the end cover, and the right end of the partition plate is sealed to the central partition plate and the spiral heat exchange plate. The front and rear sides of the partition plate are sealed to the inner wall of the cylindrical body, dividing the cavity on the left side of the spiral plate heat exchanger into an upper cavity and a lower cavity of equal size.

[0010] The upper cylindrical cavity is connected to the upper cavity body at its left end and sealed at its right end. The lower cylindrical cavity is sealed at its left end and connected to the first medium inlet at its right end. Both ends of the first spiral flow channel are sealed. The outer side of the first spiral flow channel is connected to the first medium outlet that penetrates the cylindrical body. The second spiral flow channel is sealed at its right end and the portion of its left end located above and below the central partition is connected to the upper cavity body and the lower cavity body, respectively. The upper cavity body and the lower cavity body are connected to the second medium inlet and the second medium outlet that penetrate the cylindrical body, respectively.

[0011] During heat exchange, the first medium enters through the first medium inlet, flows along the lower cylindrical cavity and the first spiral flow channel, and finally exits through the first medium outlet. The second medium enters through the second medium inlet and is divided into an outer second medium flow and an inner second medium flow. The outer second medium flow enters axially from the left end of the second spiral flow channel located above the central partition and flows downward circumferentially along the second spiral flow channel. It then enters the lower cavity from the left end of the second spiral flow channel located below the central partition and finally exits through the second medium outlet. The inner second medium flow enters axially from the upper cylindrical cavity and flows circumferentially along the second spiral flow channel located above the central partition, colliding with the outer second medium flow that enters axially into the channel, and then flows out together.

[0012] Preferably, the left end of the upper cylindrical cavity is provided with an open end plate for adjusting the ratio of the flow outside the second medium to the flow inside the second medium.

[0013] Preferably, the centerline of the second medium inlet extends in the vertical direction and intersects the centerline of the cylinder perpendicularly, and the centerline of the second medium outlet extends in the vertical direction and intersects the centerline of the cylinder perpendicularly.

[0014] More preferably, the second medium is a condensable gaseous fluid, and the end cap is also provided with a non-condensable gas outlet that communicates with the upper cavity and is higher than the upper cylindrical cavity.

[0015] Preferably, the end cap is detachably connected to the left end of the cylindrical body, and a sealing gasket is clamped between the end cap and the left end face of the cylindrical body.

[0016] Preferably, the spiral plate heat exchanger further includes a sealing round steel bar connected between two spiral heat exchange plates that extend outward alternately to block the left and right ends of the first spiral flow channel and the right end of the second spiral flow channel.

[0017] Preferably, the spiral plate heat exchanger further includes a sealing end plate, which is connected to the right end of the upper cylindrical cavity and the left and right ends of the lower cylindrical cavity to form a seal, and the first medium inlet is connected through the sealing end plate at the right end of the lower cylindrical cavity.

[0018] Preferably, the spiral plate heat exchanger further includes a central support ring plate and a spacer column. The central support ring plate is connected to the upper cylindrical cavity and the lower cylindrical cavity. There are multiple central support ring plates, which are spaced apart in the left-right direction. The spacer column is connected between two spiral heat exchange plates that extend outwards alternately.

[0019] Preferably, the thickness of the partition plate is greater than or equal to the thickness of the center plate.

[0020] Preferably, the horizontal spiral plate heat exchanger with a large flow rate and strong disturbance mixing channel further includes a support for supporting the cylindrical body.

[0021] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art:

[0022] 1. It can be applied to horizontal heat exchangers and has no heat exchange dead zone.

[0023] 2. It can perform heat exchange through cross-flow, counter-flow, and parallel-flow processes, resulting in excellent heat exchange performance.

[0024] 3. It can generate collisions within the spiral flow channel, increasing disturbance and thus reducing the boundary layer effect and improving heat transfer efficiency.

[0025] 4. Large processing capacity and easy cleaning.

[0026] 5. It can be used for both gas phase condensation heat exchange and liquid phase evaporation heat exchange. In liquid phase evaporation heat exchange, the second medium enters the lower cavity from the second medium outlet, and the evaporated gas is discharged from the second medium inlet. Attached Figure Description

[0027] Figure 1 This is a longitudinal sectional view of a preferred embodiment of the present invention.

[0028] Figure 2 yes Figure 1 Cross-sectional view along the AA direction.

[0029] Figure 3 yes Figure 1 Cross-sectional view along the BB direction.

[0030] Figure 4 yes Figure 1 The cross-sectional view along the CC direction only shows the partition plate and the cylindrical body.

[0031] Wherein: 10. Cylindrical body; 11. Upper cavity; 12. Lower cavity; 13. Second medium inlet; 131. Second medium outer flow; 132. Second medium inner flow; 14. Second medium outlet; 15. Support; 20. End cap; 21. Non-condensable gas outlet; 22. Sealing gasket; 31. Central partition; 32. Spiral heat exchange plate; 33. Upper cylindrical cavity; 331. Perforated end plate; 332. Through hole; 34. Lower cylindrical cavity; 341. First medium inlet; 35. First spiral flow channel; 351. First medium outlet; 36. Second spiral flow channel; 371. Sealing round steel; 372. Sealing end plate; 373. Central support ring plate; 374. Fixed column; 40. Dividing partition. Detailed Implementation

[0032] The up-down, left-right, and front-back directions described in this invention are Figure 1 The directions of up / down, left / right, and inside / outside are indicated by hollow arrows for the first medium and solid arrows for the second medium.

[0033] like Figures 1 to 4As shown, the horizontal spiral plate heat exchanger with a large flow rate and strong disturbance mixing channel provided by the present invention includes: a cylindrical body 10, an end cap 20, a spiral plate heat exchanger, and a partition plate 40. The axis of the cylindrical body 10 extends horizontally in the left-right direction to achieve a horizontal arrangement. The end cap 20 is connected to the left end of the cylindrical body 10 to seal the left side opening of the cylindrical body 10. The spiral plate heat exchanger is coaxially disposed inside the cylindrical body 10 and includes a central partition plate 31 extending horizontally and passing through the axis of the cylindrical body 10, and spiral heat exchange plates 32 connected to both sides of the central partition plate 31 and extending outwards in alternating spiral directions. The outermost spiral heat exchange plate 32 is sealed to the inner wall of the cylindrical body 10, so that the spiral plate heat exchanger is symmetrically distributed on the central partition plate 31. The upper cylindrical cavity 33 and lower cylindrical cavity 34 on both sides, and the first spiral flow channel 35 and the second spiral flow channel 36 surrounding the upper cylindrical cavity 33 and lower cylindrical cavity 34, the inner side of the first spiral flow channel 35 communicates with the lower cylindrical cavity 34, and the inner side of the second spiral flow channel 36 communicates with the upper cylindrical cavity 33; the partition plate 40 is located on the left side of the spiral plate heat exchanger, the partition plate 40 extends horizontally and passes through the axis of the cylindrical body 10, the left end of the partition plate 40 is sealed to the end cover 20, the right end of the partition plate 40 is sealed to the central partition plate 31 and the spiral heat exchange plate 32, and the front and rear sides of the partition plate 40 are attached to and sealed to the inner wall of the cylindrical body 10, dividing the cavity of the cylindrical body 10 on the left side of the spiral plate heat exchanger into The upper cavity 11 and lower cavity 12 are of equal size; the left end of the upper cylindrical cavity 33 is connected to the upper cavity 11 and the right end is sealed; the left end of the lower cylindrical cavity 34 is sealed and the right end is connected to the first medium inlet 341; both ends of the first spiral flow channel 35 are sealed, and the outer side of the first spiral flow channel 35 is connected to the first medium outlet 351 penetrating the cylindrical body 10; the right end of the second spiral flow channel 36 is sealed, the part of the left end above the central partition 31 is connected to the upper cavity 11, and the part of the left end below the central partition 31 is connected to the lower cavity 12; the upper cavity 11 and lower cavity 12 are connected to the second medium inlet 13 and the second medium outlet 14 penetrating the cylindrical body 10, respectively; during heat exchange, the cold side fluid enters from the first medium inlet 341 and flows along the lower cylindrical cavity 34. The first spiral flow channel 35 flows and eventually flows out from the first medium outlet 351. After the second medium enters from the second medium inlet 13, it is divided into the second medium outer flow 131 and the second medium inner flow 132. The second medium outer flow 131 enters axially from the left end of the second spiral flow channel 36 located above the central partition 31 and flows downward along the circumference of the second spiral flow channel 36. It enters the lower cavity 12 from the left end of the second spiral flow channel 36 located below the central partition 31 and eventually flows out from the second medium outlet 14. The second medium inner flow 132 enters axially from the upper cylindrical cavity 33 and flows circumferentially along the second spiral flow channel 36 located above the central partition 31. It impacts the second medium outer flow 131 that enters axially into the channel and merges with it before flowing out together.

[0034] The advantage of this setting is that:

[0035] 1. It can be applied to horizontal heat exchangers and has no heat exchange dead zone.

[0036] 2. It can perform heat exchange through cross-flow, counter-flow, and parallel-flow processes, resulting in excellent heat exchange performance.

[0037] 3. It can divide the second medium into two parts with different flow directions and enter the second spiral flow channel to form an impact, which increases the disturbance in the mixing channel composed of the second spiral flow channel, the upper cavity, the lower cavity and the upper cylindrical cavity, thereby reducing the boundary layer effect of the second medium in the second flow channel and improving the heat exchange efficiency.

[0038] 4. Large processing capacity and easy cleaning.

[0039] 5. It can be used for both gas phase condensation heat exchange and liquid phase evaporation heat exchange. In liquid phase evaporation heat exchange, the second medium enters the lower cavity from the second medium outlet, and the evaporated gas is discharged from the second medium inlet.

[0040] Preferably, the left end of the upper cylindrical cavity 33 is provided with an open end plate 331 for adjusting the ratio of the outer flow 131 and the inner flow 132 of the second medium, so as to adapt to different types and pressures of the second medium.

[0041] In this embodiment, the second medium is a condensable gaseous fluid, such as high-temperature and high-pressure steam. To facilitate the inflow and outflow of the second medium and heat exchange, the axis of the second medium inlet 13 extends in the vertical direction and intersects the axis of the cylindrical body 10 perpendicularly. The axis of the second medium outlet 14 extends in the vertical direction and intersects the axis of the cylindrical body 10 perpendicularly. The end cap 20 is also provided with a non-condensable gas outlet 21 that communicates with the upper cavity 11 and is higher than the upper cylindrical cavity 33.

[0042] To facilitate cleaning and other operations inside the upper cavity 11 and lower cavity 12, in this embodiment, the end cap 20 is detachably connected to the left end of the cylindrical body 10. This detachable connection is achieved by using a flange and bolts for fastening. At the same time, to ensure a sealing effect, a sealing gasket 22 is clamped between the end cap 20 and the left end face of the cylindrical body 10.

[0043] In this embodiment, the spiral plate heat exchanger further includes a sealing round steel bar 371, a sealing end plate 372, a central support ring plate 373, and a spacer column 374. The sealing round steel bar 371 is connected between two spiral heat exchange plates 32 that extend alternately outwards to seal the left and right ends of the first spiral flow channel 35 and the right end of the second spiral flow channel 36. The sealing end plate 372 is connected to the right end of the upper cylindrical cavity 33 and the left and right ends of the lower cylindrical cavity 34 to form a seal. The perforated end plate 331 and the sealing end plate 374... The outer contours of the end plate 372 projected in the left and right directions coincide. The perforated end plate 331 has multiple through holes 332 for the passage of the second medium. The first medium inlet 341 is connected to the sealing end plate 372 at the right end of the lower cylindrical cavity 34. The central support ring plate 373 is connected in the upper cylindrical cavity 33 and the lower cylindrical cavity 34. There are multiple central support ring plates 373, which are spaced apart in the left and right directions. The spacer column 374 is connected between two spiral heat exchange plates 32 that extend outward in alternating spiral directions.

[0044] In this embodiment, the thickness of the partition plate 40 is greater than or equal to the thickness of the center partition plate 31 to form stronger support and facilitate connection. Of course, the partition plate 40 should not be too thick to avoid occupying too much space. Preferably, the thickness of the partition plate 40 is 1.3 to 1.4 times the thickness of the center partition plate 31.

[0045] In this embodiment, the horizontal spiral plate heat exchanger with a large flow rate and strong disturbance mixing channel also includes a support 15 for supporting the cylindrical body 10. There are multiple sets of supports 15 connected to the bottom of the cylindrical body 11.

[0046] The above embodiments are only for illustrating the technical concept and features of the present invention. Their purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be used to limit the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit and essence of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A horizontal spiral plate heat exchanger with a large flow rate and strong turbulence mixing channel, comprising: A cylindrical body, wherein the axis of the cylindrical body extends horizontally in the left-right direction; An end cap, which is connected to the left end of the cylindrical body, is used to seal the left side opening of the cylindrical body; A spiral plate heat exchanger is coaxially disposed within a cylindrical body. The spiral plate heat exchanger includes a central partition extending horizontally and passing through the axis of the cylindrical body, and spiral heat exchange plates connected to both sides of the central partition and extending outward alternately in a spiral pattern. The outermost spiral heat exchange plate is sealed to the inner wall of the cylindrical body, giving the spiral plate heat exchanger an upper cylindrical cavity and a lower cylindrical cavity symmetrically distributed on the upper and lower sides of the central partition, as well as a first spiral flow channel and a second spiral flow channel surrounding the upper and lower cylindrical cavities. The inner side of the first spiral flow channel communicates with the lower cylindrical cavity, and the inner side of the second spiral flow channel communicates with the upper cylindrical cavity. A partition plate is located on the left side of the spiral plate heat exchanger. The partition plate extends horizontally and passes through the axis of the cylindrical body. The left end of the partition plate is sealed to the end cover, and the right end of the partition plate is sealed to the central partition plate and the spiral heat exchange plate. The front and rear sides of the partition plate are sealed to the inner wall of the cylindrical body, dividing the cavity on the left side of the spiral plate heat exchanger into an upper cavity and a lower cavity of equal size. Its features are: The upper cylindrical cavity is connected to the upper cavity body at its left end and sealed at its right end. The lower cylindrical cavity is sealed at its left end and connected to the first medium inlet at its right end. Both ends of the first spiral flow channel are sealed. The outer side of the first spiral flow channel is connected to the first medium outlet that penetrates the cylindrical body. The second spiral flow channel is sealed at its right end and the portion of its left end located above and below the central partition is connected to the upper cavity body and the lower cavity body, respectively. The upper cavity body and the lower cavity body are connected to the second medium inlet and the second medium outlet that penetrate the cylindrical body, respectively. During heat exchange, the first medium enters from the first medium inlet, flows along the lower cylindrical cavity and the first spiral flow channel, and finally flows out from the first medium outlet; After the second medium enters through the second medium inlet, it is divided into an outer flow and an inner flow. The outer flow enters axially from the left end of the second spiral channel located above the central partition and flows downward circumferentially along the second spiral channel. It then enters the lower cavity from the left end of the second spiral channel located below the central partition and finally flows out from the second medium outlet. The inner flow enters axially from the upper cylindrical cavity and flows circumferentially along the second spiral channel located above the central partition, colliding with the outer flow that enters the channel axially and merging with it before flowing out together.

2. The horizontal spiral plate heat exchanger with a large flow rate and strong disturbance mixing channel according to claim 1, characterized in that: The left end of the upper cylindrical cavity is provided with an open end plate for adjusting the ratio of the outer flow of the second medium to the inner flow of the second medium.

3. The horizontal spiral plate heat exchanger with a large flow rate and strong disturbance mixing channel according to claim 1, characterized in that: The centerline of the second medium inlet extends vertically and intersects the centerline of the cylinder perpendicularly, and the centerline of the second medium outlet extends vertically and intersects the centerline of the cylinder perpendicularly.

4. The horizontal spiral plate heat exchanger with a large flow rate and strong disturbance mixing channel according to claim 3, characterized in that: The second medium is a condensable gaseous fluid, and the end cap is also provided with a non-condensable gas outlet that communicates with the upper cavity and is higher than the upper cylindrical cavity.

5. The horizontal spiral plate heat exchanger with a large flow rate and strong disturbance mixing channel according to claim 1, characterized in that: The end cap is detachably connected to the left end of the cylindrical body, and a sealing gasket is clamped between the end cap and the left end face of the cylindrical body.

6. The horizontal spiral plate heat exchanger with a large flow rate and strong disturbance mixing channel according to claim 1, characterized in that: The spiral plate heat exchanger also includes a sealing round steel bar, which is connected between two spiral heat exchange plates that extend outward alternately to seal the left and right ends of the first spiral flow channel and the right end of the second spiral flow channel.

7. The horizontal spiral plate heat exchanger with a large flow rate and strong disturbance mixing channel according to claim 1, characterized in that: The spiral plate heat exchanger also includes a sealing end plate, which is connected to the right end of the upper cylindrical cavity and the left and right ends of the lower cylindrical cavity to form a seal. The first medium inlet is connected through the sealing end plate at the right end of the lower cylindrical cavity.

8. The horizontal spiral plate heat exchanger with a large flow rate and strong disturbance mixing channel according to claim 1, characterized in that: The spiral plate heat exchanger also includes a central support ring plate and a spacer column. The central support ring plate is connected to the upper cylindrical cavity and the lower cylindrical cavity. There are multiple central support ring plates, which are spaced apart in the left-right direction. The spacer column is connected between two spiral heat exchange plates that extend outwards alternately.

9. The horizontal spiral plate heat exchanger with a large flow rate and strong disturbance mixing channel according to claim 1, characterized in that: The thickness of the partition plate is greater than or equal to the thickness of the center plate.

10. The horizontal spiral plate heat exchanger with a large flow rate and strong disturbance mixing channel according to claim 1, characterized in that: The horizontal spiral plate heat exchanger with a large flow rate and strong disturbance mixing channel also includes a support for supporting the cylindrical body.

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