Flue gas condenser

Abstract

The utility model belongs to the technical field of heat exchange equipment, and particularly relates to a flue gas condenser which comprises a heat exchange box body, more than one partition plate is distributed in an inner cavity of the heat exchange box body, a flue gas channel is enclosed between the partition plate and the inner cavity of the heat exchange box body, the heat exchange box body is provided with a flue gas outlet port and a flue gas inlet port, and the flue gas outlet port is communicated with the flue gas inlet port. A plurality of heat exchange tube sets are distributed in the smoke channel, a flowing cavity is formed in the heat exchange box body, the flowing cavity and the heat exchange tube sets are connected in series to form a first heat exchange flow channel, and a first water inlet port and a first water outlet port are formed in the heat exchange box body. The flue gas heat exchanger is small in overall structure and low in cost, the flue gas channel with a long path is defined in the inner cavity of the heat exchange box body with limited space by means of the partition plate pieces, and therefore sufficient heat exchange between high-temperature flue gas and the heat exchange pipe set in the flue gas channel can be guaranteed; the water flow direction of the first heat exchange flow channel is opposite to the flowing direction of the smoke in the smoke channel, and the heat exchange efficiency between the first heat exchange flow channel and the smoke channel can be further improved.

Description

Technical field:

[0001] The utility model belongs to the technical field of heat exchange equipment, in particular to a flue gas condenser. Background technology:

[0002] Gas wall-mounted boilers usually use natural gas, artificial coal gas or liquefied gas as fuel, and transfer heat to the cold water in the inner circulation channel through the burner combustion heating method, so that the inner circulation channel can transfer heat for heating. Since the burner will produce a large amount of high-temperature flue gas after combustion, and the direct discharge of high-temperature flue gas will cause a large amount of heat loss, a flue gas condensation device will be added to the rear side of the burner to recover the heat of the high-temperature flue gas by the flue gas condensation device to improve the heat exchange efficiency of the entire equipment.

[0003] Among them, in order to recover the heat in the high-temperature flue gas as much as possible, the existing flue gas condensing device will design the entire device into a longer structure to ensure that the flue gas can have a longer heat exchange path in the flue gas channel in the condensing device. However, such a structure is not only costly, but also occupies a large space, resulting in a relatively large overall structure of the entire gas wall-mounted boiler, and causing great inconvenience in transportation and assembly. Summary of the invention:

[0004] The purpose of the utility model is to provide a flue gas condenser with a small overall structure and low cost. With the help of partition plates, a flue gas channel with a longer path is formed in the inner cavity of a heat exchange box with limited space, thereby ensuring that high-temperature flue gas can undergo sufficient heat exchange with the heat exchange tube group in the flue gas channel.

[0005] The utility model is achieved in this way:

[0006] A flue gas condenser comprises a heat exchange box, in which an inner cavity of the heat exchange box is distributed with more than one horizontally arranged partition plate, a flue gas channel is formed between the partition plate and the inner cavity of the heat exchange box, a smoke outlet port and a smoke inlet port connected with the corresponding ends of the smoke channel are respectively provided at the upper and lower ends of the heat exchange box, a plurality of groups of horizontally arranged heat exchange tube groups are distributed along the axial direction of the smoke channel, a flow cavity for connecting the corresponding ends of adjacent heat exchange tube groups in series is provided on the heat exchange box, and the flow cavity and the heat exchange tube group are connected in series to form a first heat exchange flow channel, a first water inlet port and a first water outlet port connected with both ends of the first heat exchange flow channel are provided on the heat exchange box, the first water inlet port is located near the smoke outlet port of the smoke channel, and the first water outlet port is located near the smoke inlet port of the smoke channel.

[0007] In the above-mentioned flue gas condenser, a second heat exchange channel is arranged in the flue gas passage located on one side of the first heat exchange channel, and a second water inlet port and a second water outlet port connected to both ends of the second heat exchange channel are opened on the heat exchange box.

[0008] In the above-mentioned flue gas condenser, the second heat exchange flow channel is composed of a group of heat exchange tubes horizontally arranged in the flue gas channel.

[0009] In the above-mentioned flue gas condenser, each of the heat exchange tube groups is composed of a plurality of heat exchange tubes arranged and distributed.

[0010] In the above-mentioned flue gas condenser, the partition plate is provided with one and divides the inner cavity of the heat exchange box into a smoke inlet and a smoke outlet from top to bottom. A smoke passage connecting the smoke inlet and the smoke outlet is formed between one end of the partition plate and the inner cavity wall of the heat exchange box. The smoke inlet, the smoke passage and the smoke outlet form the smoke channel. The smoke inlet port is opened on the bottom surface of the smoke inlet, and the smoke outlet port is opened on the top surface of the smoke outlet.

[0011] In the above-mentioned flue gas condenser, the bottom surface of the smoke inlet part close to the smoke passage is the lowest and is provided with a drainage port, and the smoke inlet port is provided on the bottom surface of the smoke inlet part away from the smoke passage.

[0012] In the above-mentioned flue gas condenser, the smoke outlet port is opened in the middle of the top surface of the smoke outlet part, and the smoke outlet part between the smoke outlet port and the heat exchange tube group is provided with a guide baffle, and a smoke outlet opening connecting the smoke outlet port and the smoke outlet cavity is formed between the end of the guide baffle away from the smoke outlet and the inner wall of the smoke outlet part, and the end of the guide baffle close to the smoke outlet is recessed toward the direction of the heat exchange tube group to form a lower recess.

[0013] The outstanding advantages of the utility model compared with the prior art are:

[0014] The utility model has a small overall structure and low cost. With the help of partition plates, a smoke channel with a longer path is formed in the inner cavity of the heat exchange box with limited space, thereby ensuring that the high-temperature smoke can undergo sufficient heat exchange with the heat exchange tube group in the smoke channel. In addition, the water flow direction of the first heat exchange flow channel is opposite to the flow direction of the smoke in the smoke channel, which can further improve the heat exchange efficiency between the two. Description of the drawings:

[0015] Figure 1 It is an overall stereogram of the first embodiment of the utility model;

[0016] Figure 2 This is an overall cross-sectional view of the first embodiment of the utility model Figure 1 ;

[0017] Figure 3 This is an overall cross-sectional view of the first embodiment of the utility model Figure 2 ;

[0018] Figure 4 This is an overall stereogram of the second embodiment of the utility model;

[0019] Figure 5 It is an overall cross-sectional view of the second embodiment of the present utility model.

[0020] In the figure: 1. heat exchange box body; 2. partition plate; 3. smoke channel; 4. smoke outlet port; 5. smoke inlet port; 6. flow chamber; 7. first water inlet port; 8. first water outlet port; 9. second water inlet port; 10. second water outlet port; 11. heat exchange pipe; 12. smoke inlet part; 13. smoke outlet part; 14. smoke through port; 15. drainage port; 16. guide baffle; 17. smoke outlet port; 18. recessed part. Specific implementation method:

[0021] The present invention is further described below with reference to specific embodiments. Figure 1 —5:

[0022] Embodiment 1:

[0023] A flue gas condenser comprises a heat exchange box 1, wherein the inner cavity of the heat exchange box 1 is provided with more than one horizontally arranged partition plate 2, a flue gas channel 3 is enclosed between the partition plate 2 and the inner cavity of the heat exchange box 1, a smoke outlet port 4 and a smoke inlet port 5 connected with the corresponding ends of the smoke channel 3 are respectively provided at the upper and lower ends of the heat exchange box 1, a plurality of groups of horizontally arranged heat exchange tube groups are distributed along the axial direction of the smoke channel 3, a flow cavity 6 for connecting the corresponding ends of adjacent heat exchange tube groups in series is provided on the heat exchange box 1, and the flow cavity 6 and the heat exchange tube group are connected in series to form a first heat exchange flow channel, a first water inlet port 7 and a first water outlet port 8 connected with the two ends of the first heat exchange flow channel are provided on the heat exchange box 1, the first water inlet port 7 is located near the smoke outlet port 4 of the smoke channel 3, and the first water outlet port 8 is located near the smoke inlet port 5 of the smoke channel 3. In this embodiment, the first water inlet port 7 and the first water outlet port 8 of the first heat exchange channel are connected to the inner circulation channel of the wall-mounted boiler to effectively heat the cold water in the inner circulation channel.

[0024] The utility model has a small overall structure and low cost. With the help of the partition plate 2, a smoke channel 3 with a longer path is enclosed in the inner cavity of the heat exchange box 1 with limited space, thereby ensuring that the high-temperature smoke can have sufficient heat exchange with the heat exchange tube group in the smoke channel 3. In addition, the water flow direction of the first heat exchange flow channel is opposite to the flow direction of the smoke in the smoke channel 3, which can further improve the heat exchange efficiency between the two.

[0025] Furthermore, each of the heat exchange tube groups is composed of a plurality of arranged and distributed heat exchange tubes 11. In the present embodiment, the heat exchange tube 11 is a circular light tube structure, and according to actual needs, the heat exchange tube 11 is provided with heat exchange plates for facilitating heat exchange with high-temperature flue gas.

[0026] Furthermore, in the present embodiment, the specific matching structure of the inner cavity of the heat exchange box body 1 is as follows: the partition plate 2 is provided with one and divides the inner cavity of the heat exchange box body 1 into a smoke inlet portion 12 and a smoke outlet portion 13 from top to bottom, and a smoke passage 14 connecting the smoke inlet portion 12 and the smoke outlet portion 13 is formed between one end of the partition plate 2 and the inner cavity wall of the heat exchange box body 1, the smoke inlet portion 12, the smoke passage 14 and the smoke outlet portion 13 form the smoke channel 3, the smoke inlet port 5 is opened on the bottom surface of the smoke inlet portion 12, and the smoke outlet port 4 is opened on the top surface of the smoke outlet portion 13.

[0027] Taking into account that a large amount of condensed water condenses on the outer wall of the heat exchange tube 11 during the heat exchange of high-temperature flue gas, and the condensed water will drip to the bottom of the smoke inlet 12, the bottom surface of the smoke inlet 12 close to the smoke passage 14 is the lowest and is provided with a drainage port 15, and the smoke inlet port 5 is opened on the bottom surface of the smoke inlet 12 away from the smoke passage 14.

[0028] Furthermore, in order to allow the high-temperature flue gas to have sufficient heat exchange contact with the heat exchange tube 11, the smoke outlet port 4 is opened in the middle of the top surface of the smoke outlet portion 13, and the smoke outlet portion 13 located between the smoke outlet port 4 and the heat exchange tube group is provided with a guide baffle 16, and a smoke outlet port 17 connecting the smoke outlet port 4 and the smoke outlet cavity is formed between the end of the guide baffle 16 away from the smoke through-port 14 and the inner wall of the smoke outlet portion 13, and the end of the guide baffle 16 close to the smoke through-port 14 is recessed toward the direction of the heat exchange tube group to form a lower recess 18.

[0029] Embodiment 2

[0030] The structure of this embodiment is basically the same as that of the above-mentioned embodiment 1, and the main difference is that: in the above-mentioned flue gas condenser, a second heat exchange channel is arranged in the flue gas channel 3 located on one side of the first heat exchange channel, and a second water inlet port 9 and a second water outlet port 10 connected to both ends of the second heat exchange channel are provided on the heat exchange box 1. Among them, the second water inlet port 9 and the second water outlet port 10 of the second heat exchange channel are connected to the external circulation channel for domestic water, that is, heat exchange heating can be performed not only for the cold water in the internal circulation channel, but also for the cold water in the external circulation channel. And further, in this embodiment, the second heat exchange channel is composed of a group of heat exchange tubes horizontally arranged in the flue gas channel 3.

[0031] The above embodiment is only one of the preferred embodiments of the present invention, and is not intended to limit the scope of implementation of the present invention. Therefore, any equivalent changes made based on the shape, structure, and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A flue gas condenser, characterized in that: The invention comprises a heat exchange box (1), wherein the inner cavity of the heat exchange box (1) is provided with one or more partition plates (2) arranged horizontally, a smoke passage (3) is formed between the partition plates (2) and the inner cavity of the heat exchange box (1), the upper and lower ends of the heat exchange box (1) are respectively provided with a smoke outlet port (4) and a smoke inlet port (5) which are connected to the corresponding ends of the smoke passage (3), a plurality of heat exchange tube groups are arranged horizontally in the smoke passage (3) along the axial direction thereof, and the heat exchange box A flow cavity (6) for connecting the corresponding ends of adjacent heat exchange tube groups in series is provided on the heat exchange box (1), and the flow cavity (6) and the heat exchange tube group are connected in series to form a first heat exchange flow channel. A first water inlet port (7) and a first water outlet port (8) communicating with the two ends of the first heat exchange flow channel are provided on the heat exchange box (1), the first water inlet port (7) being located near the smoke outlet port (4) of the smoke channel (3), and the first water outlet port (8) being located near the smoke inlet port (5) of the smoke channel (3).

2. A flue gas condenser according to claim 1, characterized in that: A second heat exchange channel is arranged in the smoke channel (3) located on one side of the first heat exchange channel, and a second water inlet port (9) and a second water outlet port (10) connected to both ends of the second heat exchange channel are provided on the heat exchange box (1).

3. A flue gas condenser according to claim 2, characterized in that: The second heat exchange flow channel is composed of a group of heat exchange tubes arranged horizontally in the flue gas channel (3).

4. A flue gas condenser according to claim 1 or 3, characterized in that: Each of the heat exchange tube groups is composed of a plurality of heat exchange tube pieces (11) arranged and distributed.

5. The flue gas condenser according to claim 1, characterized in that: The partition plate (2) is provided with one and divides the inner cavity of the heat exchange box (1) into a smoke inlet section (12) and a smoke outlet section (13) from top to bottom. A smoke passage (14) connecting the smoke inlet section (12) and the smoke outlet section (13) is formed between one end of the partition plate (2) and the inner cavity wall of the heat exchange box (1). The smoke inlet section (12), the smoke passage (14) and the smoke outlet section (13) form the smoke channel (3). The smoke inlet port (5) is provided on the bottom surface of the smoke inlet section (12), and the smoke outlet port (4) is provided on the top surface of the smoke outlet section (13).

6. A flue gas condenser according to claim 5, characterized in that: The bottom surface of the smoke inlet portion (12) close to the smoke passage opening (14) is at the lowest level and is provided with a drainage port (15); the smoke inlet port (5) is provided on the bottom surface of the smoke inlet portion (12) away from the smoke passage opening (14).

7. A flue gas condenser according to claim 5, characterized in that: The smoke outlet port (4) is disposed in the middle of the top surface of the smoke outlet portion (13), and the smoke outlet portion (13) located between the smoke outlet port (4) and the heat exchange tube group is provided with a guide baffle (16), a smoke outlet opening (17) connecting the smoke outlet port (4) and the smoke outlet cavity is formed between the end of the guide baffle (16) away from the smoke through opening (14) and the inner wall of the smoke outlet portion (13), and the end of the guide baffle (16) close to the smoke through opening (14) is recessed toward the heat exchange tube group to form a lower recess (18).

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