Flue gas heat exchanger
By providing an inclined wall at the smoke inlet portion of the flue gas heat exchanger, the flue gas inlet and the heat exchange inlet are dislocated, and the flue gas is directed through the inclined wall before entering the heat exchanger, thereby realizing the change of the flue gas circulation direction and defluxation phenomenon, which solves the problem of low heat exchange efficiency caused by the straight-line type of the flue gas heat exchanger, and improves the contact efficiency between the flue gas and the heat exchange plate.
Patent Information
- Application Number
- CN202421352452.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-13
- Publication Date
- 2025-03-25
- Estimated Expiration
- 2034-06-13
AI Technical Summary
In the existing flue gas heat exchangers, the flue gas path is linear, resulting in some outer edge areas of the heat exchange plate not coming into contact with the flue gas, resulting in waste of heat exchange space and low heat exchange efficiency.
A baffle flue gas heat exchanger is designed. By providing a flue gas inlet and a first inclined wall in the smoke inlet part, the flue gas inlet and the heat exchange inlet are arranged in a dislocation. The flue gas is directed through the first inclined wall before entering the heat exchange part, thereby realizing the change of the flue gas flow direction and the deflection phenomenon, ensuring that the flue gas fully contacts the heat exchange plate.
By changing the flow direction of the flue gas and achieving the breach phenomenon, the flue gas can completely fill the space of the heat exchange section and fully contact the heat exchange plate, improving the heat exchange efficiency and allowing the flue gas to enter the heat exchange section evenly.
Smart Images
Figure CN222670783U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of flue gas heat exchange equipment, in particular to a baffled flue gas heat exchanger. Background Art
[0002] Flue gas heat exchangers are mostly used in the process of flue gas cooling and waste heat recovery. At present, the flue gas path of conventional flue gas heat exchangers is mostly a linear connection path with one end in and one end out, and most flue gas heat exchangers are square in shape, and most flue gas pipes are round, such as Figure 1 As shown, after the square flue gas heat exchanger is connected to the circular flue gas duct, a large amount of flue gas passes through the inside of the heat exchanger along the inlet end 10' straight line and reaches the outlet end.
[0003] Combination Figure 1 As shown, this process makes a part of the area of the heat exchange plates arranged inside the flue gas heat exchanger (i.e., the outer edge area of the heat exchange plates) unable to contact the flue gas, resulting in a waste of heat exchange space inside the flue gas heat exchanger and reducing the heat exchange efficiency of the flue gas heat exchanger. Utility Model Content
[0004] The utility model provides a flue gas heat exchanger to solve the problem in the prior art that a part of the heat exchange plate of the flue gas heat exchanger cannot contact the flue gas, thus resulting in low heat exchange efficiency.
[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is to provide a flue gas heat exchanger, which includes: a shell, a heat exchange part and a smoke inlet part.
[0006] A smoke passage for smoke circulation is provided inside the shell; the heat exchange part is located in the middle of the shell and is provided with a plurality of heat exchange plates, and a heat exchange inlet and a heat exchange outlet are respectively provided on both sides of the heat exchange part along the first direction.
[0007] The smoke inlet portion is located on one side of the heat exchange portion along the first direction, and is provided with a first wall parallel to the heat exchange inlet, and is provided with a smoke inlet and a first inclined wall spaced apart along the second direction, wherein one end of the first inclined wall is connected to the first wall at an obtuse angle, and the other end is connected to the heat exchange inlet at an acute angle.
[0008] Compared with the prior art, the technical solution provided by the utility model has the following beneficial effects:
[0009] By arranging the smoke inlet and the first inclined wall along the second direction, the smoke inlet and the heat exchange inlet are staggered, that is, the smoke first flows along the first wall in the smoke channel to the first inclined wall connected at an obtuse angle to the first wall, and then the smoke is guided by the first inclined wall to the heat exchange inlet connected at an acute angle to the first inclined wall, thereby changing the flow direction of the smoke, allowing the smoke flowing into the heat exchange part to completely fill the space in the heat exchange part and fully contact the heat exchange plate to achieve the best heat exchange effect.
[0010] In addition, since the flue gas flows in a straight line without intervention, the flue gas is guided by the first inclined wall, so that the flue gas will be deflected before heat exchange, thereby achieving a flue gas redistribution effect (changing the flow rate and direction of the flue gas, etc.), allowing the flue gas to enter the heat exchange part evenly, thereby increasing the heat exchange efficiency.
[0011] In some embodiments, the flue gas heat exchanger is further provided with a smoke outlet, which is located along the first direction on a side of the heat exchange portion away from the smoke inlet portion, wherein the smoke outlet is provided with a second wall parallel to the heat exchange outlet, and a smoke outlet and a second inclined wall are spaced apart along the second direction, one end of the second inclined wall is connected to the second wall at an obtuse angle, and the other end is connected to the heat exchange outlet at an acute angle.
[0012] By adopting the above technical solution, the flue gas after heat exchange is guided by the second inclined wall and the second wall, so that the flue gas after heat exchange can also be deflected and flow from the flue gas outlet to the external pipeline.
[0013] Furthermore, the smoke inlet and the smoke outlet are symmetrically arranged along the first direction.
[0014] By adopting the above technical solution, the shell is symmetrically arranged along the first direction, so that the shell can maintain weight balance on both sides.
[0015] In some embodiments, the heat exchange portion is provided with a main cooling water inlet and a main cooling water outlet, and the main cooling water inlet and the main cooling water outlet are respectively connected to the plurality of heat exchange plates, wherein the main cooling water inlet and the main cooling water outlet are spaced apart at the top of the shell along the first direction.
[0016] By adopting the above technical solution, the cooling medium is introduced centrally through the cooling water main inlet and the cooling water main outlet, so that the cooling medium and the flue gas can exchange heat through the heat exchange plate.
[0017] In some embodiments, the heat exchange plates are arranged at intervals in the heat exchange portion along the second direction, and the heat exchange plates have a cooling water inlet, a cooling water outlet and a drain outlet, and the drain outlet and the cooling water outlet are respectively located on both sides of the heat exchange plate; wherein the cooling water inlet is connected to the main cooling water inlet, the cooling water outlet is connected to the main cooling water outlet, and the drain outlet is connected to the plate drain outlet.
[0018] By adopting the above technical solution, adding a plate drain port can not only discharge the residues in the heat exchange plate after long-term operation, but also effectively prevent the heat exchange plate from freezing and damaging the plate body in winter. The cooling water inlet and cooling water outlet are arranged on the heat exchange plate, so that they are connected to the first header and the second header respectively, so as to realize the overall distribution of the cooling medium to each heat exchange plate.
[0019] In some embodiments, a drain trough and a drain port are further provided at the bottom of the shell along the second direction, and the drain trough is connected to the heat exchange part, wherein the drain port is located in the middle of the drain trough.
[0020] By adopting the above technical solution, the dirt on the outside of the heat exchange plate can be discharged through the sewage trough and the sewage outlet by gravity.
[0021] In some embodiments, the smoke inlet and / or the smoke outlet is a circular duct opening.
[0022] By adopting the above technical solution, a large amount of smoke will not be concentrated in the middle of the heat exchange plate by guiding the smoke with beveled edges. Therefore, the smoke inlet and the smoke outlet are set as circular pipe openings, which will not affect the flow path of the smoke and can be easily connected to the external smoke pipe.
[0023] In some embodiments, the heat exchange portion is provided with a plurality of reinforcing ribs on both sides along the third direction, wherein the plurality of reinforcing ribs are staggered along the first direction and the second direction, and wherein ear seats are further provided at the intersections of the plurality of reinforcing ribs.
[0024] By adopting the above technical solution, reinforcing ribs are added to improve the overall strength of the shell, wherein the ear seats are arranged at the connection of the reinforcing ribs, so that when the flue gas heat exchanger is installed and fixed by the ear seats, the installation stability can be improved.
[0025] In some embodiments, the heat exchange portion is further provided with a cleaning door, and the cleaning door is located between the cooling water main inlet and the cooling water main outlet along the first direction.
[0026] With the above technical solution, since the flue gas usually carries a large amount of impurities, a cleaning door that can be opened and closed is provided to facilitate timely cleaning of dirt attached to the heat exchange plate and the inner wall of the shell. BRIEF DESCRIPTION OF THE DRAWINGS
[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work, among which:
[0028] Figure 1 It is the flue gas flow path of the flue gas heat exchanger in the prior art provided by the utility model;
[0029] Figure 2 It is a three-dimensional structural schematic diagram of an embodiment of a flue gas heat exchanger provided by the utility model;
[0030] Figure 3 It is a flue gas flow path of an embodiment of a flue gas heat exchanger provided by the utility model;
[0031] Figure 4 It is a structural schematic diagram of an embodiment of a heat exchange plate of a flue gas heat exchanger provided by the utility model;
[0032] Figure 5 It is a side view of an embodiment of a flue gas heat exchanger provided by the utility model;
[0033] Figure 6 It is a top view of an embodiment of a flue gas heat exchanger provided by the utility model.
[0034] In the figure:
[0035] Shell—10; smoke channel—11; sewage trough—12; sewage outlet—13;
[0036] Smoke inlet—20; smoke inlet—21; first wall—22; first inclined wall—23;
[0037] Heat exchange part—30; heat exchange plate—31; cooling water inlet—310; cooling water outlet—311; sewage outlet—312; cooling water main inlet—32; cooling water main outlet—33; first header—34; second header—35; plate sewage outlet—36; reinforcing rib—37; ear seat—38; cleaning door—39;
[0038] Smoke outlet—40; smoke outlet—41; second wall—42; second inclined wall—43;
[0039] Inlet end—10'. DETAILED DESCRIPTION
[0040] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.
[0041] In order to facilitate the subsequent description, before describing the specific structure of the flue gas heat exchanger, this application first combines Figure 2 A first direction (X), a second direction (Z), and a third direction (Y) are defined. The first direction is the length direction of the flue gas heat exchanger when it is normally placed, such as the X direction; the second direction is the height direction of the flue gas heat exchanger when it is normally placed, such as the Z direction; and the third direction is the width direction of the flue gas heat exchanger when it is normally placed, such as the Y direction. In this application, the first direction (X), the second direction (Z), and the third direction (Y) are perpendicular to each other.
[0042] It can be understood that the mutual perpendicularity in the present application is not absolute perpendicularity, and the approximate perpendicularity caused by processing errors and assembly errors (for example, the angle between two structural features is 89.9°) is also within the range of mutual perpendicularity in the present application.
[0043] See also Figures 1 to 3 As shown, Figure 1 The figure shows the flue gas flow path of the flue gas heat exchanger in the prior art; Figure 2 A schematic diagram of the three-dimensional structure of an embodiment of a flue gas heat exchanger provided by the present application is shown; Figure 3 The figure shows a flue gas flow path of an embodiment of a flue gas heat exchanger provided by the present application.
[0044] In some embodiments, the flue gas heat exchanger includes: a shell 10 , a heat exchange part 30 and a smoke inlet part 20 .
[0045] The shell 10 is provided with a smoke passage 11 for smoke circulation. The heat exchange part 30 is located in the middle of the shell 10 and is provided with a plurality of heat exchange plates 31. The heat exchange part 30 is provided with a heat exchange inlet and a heat exchange outlet on both sides along the first direction.
[0046] The smoke inlet 20 is located on one side of the heat exchange part 30 along the first direction, and is provided with a first wall 22 parallel to the heat exchange inlet, and is provided with a smoke inlet 21 and a first inclined wall 23 spaced apart along the second direction, wherein one end of the first inclined wall 23 is connected to the first wall 22 at an obtuse angle, and the other end is connected to the heat exchange inlet at an acute angle.
[0047] In the embodiment of the present application, by arranging the smoke inlet 21 and the first inclined wall 23 along the second direction, the smoke inlet 21 and the heat exchange inlet are staggered. Figure 3 As shown, the smoke first flows along the first wall 22 in the smoke channel 11 to the first inclined wall 23 connected at an obtuse angle to the first wall 22, and then the first inclined wall 23 guides the smoke to the heat exchange inlet connected at an acute angle to the first inclined wall 23, thereby changing the flow direction of the smoke, allowing the smoke flowing into the heat exchange part 30 to completely fill the space in the heat exchange part 30 and fully contact the heat exchange plate 31 to achieve the best heat exchange effect.
[0048] In addition, combined Figure 1 As shown, the flue gas flows in a straight line without intervention. Currently, the flue gas passes through the heat exchanger along the straight line 10'10' of the inlet end, so that a large amount of flue gas is concentrated in the middle of the heat exchanger. In the present application, the first inclined wall 23 is used to guide the flue gas, so that the flue gas will be baffled before the heat exchange, thereby achieving the redistribution effect of the flue gas (changing the flow rate and direction of the flue gas, etc.), so that the flue gas enters the heat exchange part 30 evenly, and the heat exchange efficiency is increased.
[0049] In some embodiments, the flue gas heat exchanger is further provided with a smoke outlet 40, which is located along the first direction on the side of the heat exchange part 30 away from the smoke inlet 20, wherein the smoke outlet 40 is provided with a second wall 42 parallel to the heat exchange outlet, and a smoke outlet 41 and a second inclined wall 43 are spaced apart along the second direction, one end of the second inclined wall 43 is connected to the second wall 42 at an obtuse angle, and the other end is connected to the heat exchange outlet at an acute angle.
[0050] In the embodiment of the present application, the flue gas after heat exchange is guided by the second inclined wall 43 and the second wall 42 so that the flue gas after heat exchange can also be deflected and flow to the external pipe through the flue gas outlet 41. Exemplarily, the flue gas outlet 41 can also be located on one side of the housing 10 along the first direction.
[0051] The smoke inlet 20 and the smoke outlet 40 are symmetrically arranged along the first direction. Exemplarily, the smoke inlet 20 and the smoke outlet 40 are symmetrically arranged, that is, the first wall 22 is parallel to the second wall 42, and the first inclined wall 23 and the second inclined wall 43 have the same inclination angle, so that the housing 10 is symmetrically arranged along the first direction, which facilitates the housing 10 to maintain weight balance on both sides.
[0052] In some embodiments, the heat exchange part 30 is provided with a cooling water main inlet 32 and a cooling water main outlet 33, and the cooling water main inlet 32 and the cooling water main outlet 33 are respectively connected to the plurality of heat exchange plates 31, wherein the cooling water main inlet 32 and the cooling water main outlet 33 are spaced apart at the top of the shell 10 along the first direction.
[0053] In the present application embodiment, combined Figure 2 As shown, the cooling water main inlet 32 is also connected to the first header 34, and the cooling water main outlet 33 is connected to the second header 35. The cooling medium is introduced centrally through the cooling water main inlet 32 and the cooling water main outlet 33, and the first header 34 and the second header 35 are respectively connected to the plurality of heat exchange plates 31, so that the cooling medium and the flue gas can exchange heat through the heat exchange plates 31.
[0054] See also Figure 4 As shown, Figure 4 A structural schematic diagram of an embodiment of a heat exchange plate 31 of a flue gas heat exchanger provided in the present application is shown.
[0055] In some embodiments, the heat exchange plate 31 is arranged at intervals in the heat exchange part 30 along the second direction, and the heat exchange plate 31 has a cooling water inlet 310, a cooling water outlet 311 and a sewage outlet 31213, and the sewage outlet 31213 and the cooling water outlet 311 are respectively located on both sides of the heat exchange plate 31; wherein the cooling water inlet 310 is connected to the cooling water main inlet 32, the cooling water outlet 311 is connected to the cooling water main outlet 33, and the sewage outlet 31213 is connected to the plate sewage outlet 36.
[0056] In the present application embodiment, combined Figure 3 and Figure 4 As shown, the heat exchange plates 31 are arranged at intervals along the third direction, wherein the spacing distance between the multiple heat exchange plates 31 and the number of heat exchange plates 31 can be adjusted according to actual working conditions. For example, if the dust particles in the flue gas are large, the distance between two adjacent heat exchange plates 31 is increased. This application does not limit this.
[0057] Exemplarily, a cooling water inlet 310 and a cooling water outlet 311 are provided on the heat exchange plate 31, wherein the cooling water inlet 310 and the cooling water outlet 311 are located on the same side of the heat exchange plate 31, so as to be conveniently connected with the first header 34 and the second header 35, so that an external water pump can drive the cooling medium to flow inside the heat exchange plate 31.
[0058] See also Figure 5 As shown, Figure 5 A side view of an embodiment of a flue gas heat exchanger provided in the present application is shown.
[0059] In some embodiments, the heat exchange portion 30 is further provided with a plate drain port 36 , which is located at the bottom of the shell 10 along the first direction and is respectively connected to the plurality of heat exchange plates 31 .
[0060] In the present application embodiment, combined Figure 4 and Figure 5As shown, multiple drain ports 31213 are connected to the plate drain port 36 to discharge the residues from long-term operation in the heat exchange plate 31. It can also effectively prevent the inside of the heat exchange plate 31 from freezing and damaging the plate body in winter. For example, in winter, it can ensure that the cooling medium (cooling water, etc.) in the plate is completely drained.
[0061] In some embodiments, a drain trough 12 and a drain port 31213 are further provided at the bottom of the shell 10 along the first direction, and the drain trough 12 is connected to the heat exchange part 30 , wherein the drain port 31213 is located in the middle of the drain trough 12 .
[0062] In the embodiment of the present application, the dirt outside the heat exchange plate 31 can be discharged through the drain groove 12 and the drain port 31213 by gravity. Exemplarily, the drain groove 12 is convexly arranged at the bottom of the heat exchange part 30 along the first direction to prevent the dirt from accumulating on the bottom surface of the heat exchange part 30 and then contacting the heat exchange plate 31.
[0063] In some embodiments, the heat exchange portion 30 is provided with a plurality of reinforcing ribs 37 on both sides along the third direction, wherein the plurality of reinforcing ribs 37 are staggered along the first direction and the third direction. The heat exchange portion 30 is also provided with a plurality of ear seats 38 on both sides along the third direction, wherein the ear seats 38 are located at the intersection of the plurality of reinforcing ribs 37.
[0064] In the embodiment of the present application, reinforcing ribs 37 are added to improve the overall strength of the housing 10, wherein the ear seats 38 are arranged at the connection of the reinforcing ribs 37, so that when the flue gas heat exchanger is installed and fixed by the ear seats 38, the installation stability can be improved. Exemplarily, the ear seats 38 are arranged on both sides of the heat exchange part 30 along the third direction (for example, 4 are arranged). Since the main weight of the flue gas heat exchanger is concentrated on the heat exchange part 30, arranging the ear seats 38 on both sides of the heat exchange part 30 can further improve the stability of the flue gas heat exchanger.
[0065] See also Figure 6 As shown, Figure 6 A top view of an embodiment of a flue gas heat exchanger provided in the present application is shown.
[0066] In some embodiments, the smoke inlet 21 and / or the smoke outlet 41 is a circular duct opening.
[0067] In the embodiment of the present application, the flue gas is deflected by the beveled edge so that a large amount of flue gas will not be concentrated in the middle of the heat exchange plate 31. Therefore, the flue gas inlet 21 and the flue gas outlet 41 are set as circular pipe openings. Figure 6 As shown, the opening shape is circular to facilitate connection with an external flue gas duct.
[0068] In some embodiments, the heat exchange portion 30 is further provided with a cleaning door 39 , and the cleaning door 39 is located between the cooling water main inlet 32 and the cooling water main outlet 33 along the first direction.
[0069] In the embodiment of the present application, since the flue gas usually carries a large amount of impurities, a cleaning door 39 that can be opened and closed is provided to facilitate timely cleaning of dirt attached to the heat exchange plate 31 and the inner wall of the shell 10. For example, the heat exchange plate 31 is a pillow-shaped plate with a smooth surface that is not easy to adhere to dust or solid particles in the exhaust gas. Combined with the plate sewage outlet 36, the number of times that cleaning is required can be effectively reduced.
[0070] The above description is only an implementation method of the present utility model, and does not limit the patent scope of the present utility model. Any equivalent structure or equivalent process transformation made using the contents of the specification and drawings of the present utility model, or directly or indirectly used in other related technical fields, should be included in the protection scope of the present utility model.
Claims
1. A flue gas heat exchanger, characterized in that: include: A shell, wherein a smoke passage for smoke circulation is provided inside the shell; A heat exchange part, the heat exchange part is located in the middle of the shell and is provided with a plurality of heat exchange plates, and a heat exchange inlet and a heat exchange outlet are respectively provided on both sides of the heat exchange part along the first direction; A smoke inlet portion, wherein the smoke inlet portion is located on one side of the heat exchange portion along the first direction, the smoke inlet portion is provided with a first wall parallel to the heat exchange inlet, and a smoke inlet and a first inclined wall are spaced apart along the second direction, wherein one end of the first inclined wall is connected to the first wall at an obtuse angle, and the other end is connected to the heat exchange inlet at an acute angle.
2. The flue gas heat exchanger according to claim 1, characterized in that: The flue gas heat exchanger is also provided with a smoke outlet, which is located on a side of the heat exchange part away from the smoke inlet along the first direction, wherein the smoke outlet is provided with a second wall parallel to the heat exchange outlet, and a smoke outlet and a second inclined wall are spaced apart along the second direction, one end of the second inclined wall is connected to the second wall at an obtuse angle, and the other end is connected to the heat exchange outlet at an acute angle.
3. The flue gas heat exchanger according to claim 2, characterized in that: The smoke inlet portion and the smoke outlet portion are symmetrically arranged along the first direction.
4. The flue gas heat exchanger according to claim 1, characterized in that: The heat exchange part is provided with a cooling water main inlet and a cooling water main outlet, and the cooling water main inlet and the cooling water main outlet are respectively connected to the plurality of heat exchange plates, wherein the cooling water main inlet and the cooling water main outlet are spaced apart at the top of the shell along the first direction.
5. The flue gas heat exchanger according to claim 1, characterized in that: The heat exchange part is also provided with a plate drain port, which is located at the bottom of the shell along the first direction and is respectively communicated with the plurality of heat exchange plates in the heat exchange part.
6. The flue gas heat exchanger according to claim 4 or 5, characterized in that: The heat exchange plates are arranged at intervals in the heat exchange part along the second direction, and the heat exchange plates have a cooling water inlet, a cooling water outlet and a sewage outlet, and the sewage outlet and the cooling water outlet are respectively located on both sides of the heat exchange plate; wherein the cooling water inlet is connected to the cooling water main inlet, the cooling water outlet is connected to the cooling water main outlet, and the sewage outlet is connected to the plate sewage outlet.
7. The flue gas heat exchanger according to claim 1, characterized in that: The bottom of the shell along the second direction is also provided with a drain groove and a drain port, the drain groove is communicated with the heat exchange part, wherein the drain port is located in the middle of the drain groove.
8. The flue gas heat exchanger according to claim 1 or 2, characterized in that: The smoke inlet and / or smoke outlet is a circular pipe opening.
9. The flue gas heat exchanger according to claim 1, characterized in that: The heat exchange part is provided with a plurality of reinforcing ribs on both sides along the third direction, wherein the plurality of reinforcing ribs are staggered along the first direction and the second direction, and wherein ear seats are further provided at the intersections of the plurality of reinforcing ribs.
10. The flue gas heat exchanger according to claim 1, characterized in that: The heat exchange part is further provided with a cleaning door, and the cleaning door is located between the cooling water main inlet and the cooling water main outlet along the first direction.