A high-temperature flue gas cooling device

Abstract

This utility model provides a high-temperature flue gas cooling device, comprising: an outer shell tube body, with a water inlet at one end and a water outlet at the other end; a heat exchange cylinder disposed within and penetrating the outer shell tube body, with one end serving as an air inlet and the other end as an air outlet, wherein a first cooling water cavity is formed between the heat exchange cylinder and the outer shell tube body; multiple heat exchange plate assemblies disposed within and connected to the heat exchange cylinder, wherein a second cooling water cavity is formed between the multiple heat exchange plate assemblies; and an inner shell tube body connected to the heat exchange plate assemblies for fixation within the heat exchange cylinder, wherein a first flue gas passage is provided within the inner shell tube body, and a second flue gas passage is provided between the heat exchange cylinder and the heat exchange plate assemblies, the first and second flue gas passages being connected and connected to the air inlet and the air outlet; wherein a third cooling water cavity is formed between the inner shell tube body and the heat exchange plate assemblies, and the first, second, and third cooling water cavities are connected.

Description

Technical Field

[0001] This utility model relates to the field of heat exchange technology, and in particular to a high-temperature flue gas cooling device. Background Technology

[0002] The high-temperature flue gas generated by plasma melting furnaces is extremely hot. Direct emission of this gas would not only affect the lifespan of the equipment but could also lead to failure to meet emission standards and secondary pollution. Therefore, the high-temperature flue gas generated by plasma melting furnaces must be cooled.

[0003] The high-temperature flue gas from the plasma melting furnace contains a lot of dust. During the cooling process of the high-temperature flue gas, the dust easily clumps together, and as the equipment operates for a long time, the dust will clog the heat exchange tube inlets, which will cause the entire flue gas system to be unable to maintain negative pressure, leading to a series of safety problems. Utility Model Content

[0004] The purpose of this invention is to provide a high-temperature flue gas cooling device that can improve heat exchange efficiency and reduce the problem of dust clogging the pipe opening.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0006] This utility model provides a high-temperature flue gas cooling device, comprising:

[0007] The outer casing tube body has an inlet at one end and an outlet at the other end.

[0008] A heat exchange cylinder is disposed in and penetrates the outer shell tube body. One end of the heat exchange cylinder serves as an air inlet, and the other end serves as an air outlet. A first cooling water chamber is formed between the heat exchange cylinder and the outer shell tube body.

[0009] Multiple heat exchanger plate assemblies are disposed within and connected to the heat exchanger cylinder, and a second cooling water chamber is formed between the multiple heat exchanger plate assemblies; and

[0010] The inner shell tube body is connected to the heat exchange plate assembly to be fixed in the heat exchange cylinder. A first flue gas passage is provided in the inner shell tube body, and a second flue gas passage is provided between the heat exchange cylinder and the heat exchange plate assembly. The first flue gas passage and the second flue gas passage are connected and connected to the air inlet and the air outlet.

[0011] A third cooling water chamber is formed between the inner shell tube body and the heat exchange plate assembly, and the first cooling water chamber, the second cooling water chamber and the third cooling water chamber are connected.

[0012] In one embodiment of this utility model, the outlet is disposed on the outer casing tube body and is located at the position with the longest fluid path between it and the inlet.

[0013] In one embodiment of the present invention, the water inlet is located at one end of the outer casing tube body near the air outlet, and the water outlet is located at one end of the outer casing tube body near the air inlet.

[0014] In one embodiment of this utility model, the heat exchange plate assembly includes:

[0015] Multiple first heat exchange plates are connected to the inner wall of the heat exchange cylinder;

[0016] A second heat exchange plate is connected between adjacent first heat exchange plates; and

[0017] Multiple sealing plates are connected to the same-direction ends of the heat exchange cylinder, the inner shell tube body, the first heat exchange plate, and the second heat exchange plate.

[0018] In one embodiment of the present invention, the high-temperature flue gas cooling device includes ribs, which are connected to the first heat exchange plates that are adjacent to each other and belong to different heat exchange plate groups.

[0019] In one embodiment of the present invention, the high-temperature flue gas cooling device includes a partition plate, the partition plate being connected to the inner wall of the heat exchange cylinder and the second heat exchange plate, wherein the partition plate is fixed in the second flue gas channel.

[0020] In one embodiment of the present invention, the high-temperature flue gas cooling device includes a plurality of baffles connected between the heat exchange cylinder and the outer shell tube body, wherein the baffles are provided with through holes for cooling water to pass through.

[0021] In one embodiment of the present invention, the tube wall of the outer shell tube body and the tube wall of the heat exchange cylinder are distributed in parallel, wherein the heat exchange cylinder and the outer shell tube body have a transition tube section, wherein the diameter of the transition tube section increases along the direction away from the cylinder opening of the heat exchange cylinder, wherein the transition tube section is connected to the first flue gas passage and the second flue gas passage.

[0022] In one embodiment of this utility model, the high-temperature flue gas cooling device includes multiple flange structures, which are disposed at both ends of the heat exchange cylinder and in the middle of the outer wall of the outer shell tube body.

[0023] In one embodiment of the present invention, the high-temperature flue gas cooling device includes a plurality of second flue gas channels, and the plurality of second flue gas channels are arranged in a ring array about the axis of the inner shell tube body.

[0024] As described above, this utility model provides a high-temperature flue gas cooling device that can improve the cooling efficiency of high-temperature flue gas and prevent dust carried in the high-temperature flue gas from clogging the cooling pipe opening. It can not only avoid pollution and equipment damage caused by direct emission of flue gas, but also ensure the normal operation of the flue gas system.

[0025] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a schematic diagram of the structure of a high-temperature flue gas cooling device in one embodiment of the present invention.

[0028] Figure 2 This is a cross-sectional view of a high-temperature flue gas cooling device in one embodiment of the present invention.

[0029] Figure 3 As shown in one embodiment of this utility model Figure 2 A schematic diagram of the structure at point BB.

[0030] Figure 4 This is a top view of the high-temperature flue gas cooling device in one embodiment of the present invention.

[0031] Figure 5 As shown in one embodiment of this utility model Figure 4 Cross-sectional view of CC.

[0032] Figure 6 As shown in one embodiment of this utility model Figure 5 A magnified view of a section at point I.

[0033] In the diagram: 10, outer shell tube body; 110, inlet pipe; 111, first flange; 120, outlet pipe; 121, second flange; 130, sealing plate; 140, partition plate; 141, first through hole; 20, heat exchange cylinder; 30, first heat exchange plate; 40, second heat exchange plate; 50, inner shell tube body; 60, connecting pipe section; 61, third flange; 70, fourth flange; 100, first cooling water chamber; 200, second cooling water chamber; 210, rib plate; 211, second through hole; 300, third cooling water chamber; 400, first flue gas passage; 500, second flue gas passage; 510, shelf plate; 600, air inlet pipe; 700, air outlet pipe; 800, transition pipe section. Detailed Implementation

[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0035] Please see Figure 1 and Figure 2 As shown, this utility model provides a high-temperature flue gas cooling device, which includes an outer shell tube body 10, a heat exchange cylinder 20, multiple heat exchange plate assemblies, and an inner shell tube body 50. In this embodiment, the outer shell tube body 10, the heat exchange cylinder 20, and the inner shell tube body 50 are all rotating components, wherein the inner shell tube body 50 is a cylinder. In this embodiment, a water inlet is provided on one side of the outer shell tube body 10, and a water outlet is provided on the other side. The heat exchange cylinder 20 is disposed in and penetrates the outer shell tube body 10. One end of the heat exchange cylinder 20 serves as an air inlet, and the other end serves as an air outlet. A first cooling water cavity 100 is formed between the heat exchange cylinder 20 and the outer shell tube body 10. Multiple heat exchange plate assemblies are disposed in and connected to the heat exchange cylinder 20, and a second cooling water cavity 200 is formed between the multiple heat exchange plate assemblies. The inner shell tube body 50 is connected to the heat exchange plate assemblies to be fixed in the heat exchange cylinder 20. The inner shell tube body 50 is provided with a first flue gas passage 400, and a second flue gas passage 500 is provided between the heat exchange cylinder 20 and the heat exchange plate assembly. The first flue gas passage 400 and the second flue gas passage 500 are connected and connected to the air inlet and the air outlet. A third cooling water chamber 300 is formed between the inner shell tube body 50 and the heat exchange plate assembly, and the first cooling water chamber 100, the second cooling water chamber 200, and the third cooling water chamber 300 are connected. In this invention, cooling water enters the first cooling water chamber 100 from the water inlet, then enters the second cooling water chamber 200, and then enters the third cooling water chamber 300. The filled water exits from the water outlet. Flue gas enters the first flue gas passage 400 and the second flue gas passage 500 from the air inlet and exits from the exhaust port. The flue gas in the first flue gas passage 400 and the cooling water in the third cooling water chamber 300 are in intermittent contact, thereby achieving heat exchange. The flue gas in the second flue gas passage 500 comes into intermittent contact with the cooling water in the first cooling water chamber 100, the second cooling water chamber 200, and the third cooling water chamber 300, thereby achieving heat exchange. In this process, the flue gas is divided into multiple chambers and passages, each in intermittent contact with the cooling water. This achieves rapid cooling while also preventing flue gas dust from accumulating at the pipe openings, which is a common problem with pipe cooling methods.

[0036] Please see Figure 1 and Figure 2As shown, in one embodiment of this utility model, the water inlet is located at the end of the outer casing tube body 10 near the air outlet, and the water outlet is located at the end of the outer casing tube body 10 near the air inlet, so that the flue gas can fully contact the cooling water and achieve sufficient cooling of the flue gas. In this embodiment, the water outlet is located on the outer casing tube body 10 and at the position with the longest fluid path between it and the water inlet. By lengthening the distance between the water outlet and the water inlet, the actual path of the cooling water is increased, thereby maximizing the heat exchange area between the flue gas and the cooling water. In this embodiment, the outer casing tube body 10 is equipped with a water inlet pipe 110 and a water outlet pipe 120, wherein the water inlet pipe 110 is connected to the water inlet and the water outlet pipe 120 is connected to the water outlet. In this embodiment, the outer casing tube body 10 is a closed hollow rotating body. Through the heat exchange cylinder 20 penetrating the outer casing tube body 10, one end of the heat exchange cylinder 20 forms an air inlet for entering the flue gas, and the other end forms an air outlet for exiting the flue gas.

[0037] Please see Figures 1 to 3 As shown, in one embodiment of this utility model, the heat exchange plate assembly includes multiple first heat exchange plates 30, second heat exchange plates 40, and multiple sealing plates 130. The multiple first heat exchange plates 30 are connected to the inner wall of the heat exchange cylinder 20. In this embodiment, the first heat exchange plates 30 in the same heat exchange plate assembly are symmetrical about the cylinder axis of the heat exchange cylinder 20. Adjacent first heat exchange plates 30 in adjacent heat exchange plate assemblies are distributed in parallel. In this embodiment, second heat exchange plates 40 are connected between adjacent first heat exchange plates 30. The second heat exchange plates 40 and the first heat exchange plates 30 divide the internal space of the heat exchange cylinder 20 into multiple second flue gas channels 500 and multiple second cooling water chambers 200. Multiple sealing plates 130 are connected to the same-direction ends of the heat exchange cylinder 20, the inner shell tube body 50, the first heat exchange plates 30, and the second heat exchange plates 40. The sealing plates 130 seal the ends of the second cooling water chambers 200 and the third cooling water chambers 300 near the air inlet and outlet. The first cooling water chamber 100, the second cooling water chamber 200 and the third cooling water chamber 300 are connected, and the connection can be achieved by the chamber having an opening in the radial direction of the heat exchange cylinder 20.

[0038] Please see Figures 1 to 5 As shown, in one embodiment of this utility model, the high-temperature flue gas cooling device includes a rib plate 210, which is connected to adjacent first heat exchange plates 30 belonging to different heat exchange plate groups. By setting the rib plate 210, the fixing stability of the heat exchange plate groups within the heat exchange cylinder 20 is improved. The rib plate 210 connects multiple heat exchange plate groups, thereby improving the installation stability of the multiple heat exchange plate groups. In this embodiment, as... Figure 3 As shown, in the radial section, the length of the rib 210 is less than the length of the first heat exchange plate 30, which facilitates the axial movement of water in the second cooling water chamber 200. Holes, such as a second through hole 211, can be made in the rib 210 to improve the flow of cooling water in the second cooling water chamber 200.

[0039] Please see Figures 1 to 3 As shown, in one embodiment of this utility model, the high-temperature flue gas cooling device includes a shelf 510, which is connected to the inner wall of the heat exchange cylinder 20 and the second heat exchange plate 40. The shelf 510 is fixed in the second flue gas channel 500. In this embodiment, the shelf 510 is disposed in the second flue gas channel 500, and the extending direction of the shelf 510 is consistent with the flue gas flow direction. The shelf 510 separates the flue gas, allowing a smaller volume of flue gas to contact the cooling water, thus achieving faster flue gas cooling. In this embodiment, the cross-sectional area of ​​the shelf 510 is smaller than the cross-sectional area of ​​the second flue gas channel 500, thereby avoiding the shelf 510 directly separating the second flue gas channel 500. The shelf 510 of the second flue gas channel 500 can be, for example, one. In other embodiments of this utility model, the shelf 510 of the second flue gas channel 500 can be multiple, which can be adjusted according to the actual size of the equipment. In this embodiment, the multiple second flue gas channels 500 are arranged in a ring array about the axis of the inner shell tube body 50.

[0040] Please see Figures 1 to 3 , Figure 5 As shown, in one embodiment of this utility model, the high-temperature flue gas cooling device includes multiple baffles 140, which are connected between the heat exchange cylinder 20 and the outer shell tube body 10. Each baffle 140 has a first through hole 141 for cooling water to pass through. In this embodiment, the baffles 140 are disposed in the first cooling water chamber 100, and for example, three baffles 140 can be provided. One baffle 140 is disposed in the middle of the first cooling water chamber 100, and the other two baffles 140 are respectively disposed at the end of the first cooling water chamber 100 near the outlet and the end of the first cooling water chamber 100 near the inlet. By setting the baffles 140, the water flow velocity in the first cooling water chamber 100 is limited, allowing cooling water to preferentially fill the second cooling water chamber 200 and the third cooling water chamber 300. In this embodiment, a reinforcing rib structure can be provided on the outer wall of the heat exchange cylinder 20 to improve the structural strength of the device.

[0041] Please see Figures 1 to 3 , Figure 5 As shown, in one embodiment of this utility model, the walls of the outer casing tube body 10 and the heat exchange cylinder 20 are distributed in parallel. In this embodiment, the heat exchange cylinder 20 and the outer casing tube body 10 have a transition tube section 800. The diameter of the transition tube section 800 increases along the direction away from the cylinder opening of the heat exchange cylinder 20, and the transition tube section 800 connects to the first flue gas passage 400 and the second flue gas passage 500. In this embodiment, the high-temperature flue gas cooling device includes an inlet pipe 600 and an outlet pipe 700. The inlet pipe 600 connects to the inlet and the transition tube section 800, and the outlet pipe 700 connects to the outlet and another transition tube section 800.

[0042] Please see Figures 1 to 6 As shown, in one embodiment of this utility model, the high-temperature flue gas cooling device includes multiple flange structures, which are disposed at both ends of the heat exchange cylinder 20 and in the middle of the outer wall of the outer shell tube body 10. In this embodiment, the flange structure includes a first flange 111, a second flange 121, a third flange 610, and a fourth flange 70. The first flange 111 is installed at the water inlet end of the water inlet pipe 110. The second flange 121 is installed at the water outlet end of the water outlet pipe 120. The third flange 610 is installed at the air inlet end of the air inlet pipe 600 and the air outlet end of the air outlet pipe 700. The fourth flange 70 is installed in the middle of the outer shell tube body 10. In this embodiment, the fourth flange 70 is fixed to the middle of the outer wall of the outer shell tube body 10. In another embodiment of this utility model, the fourth flange 70 can pass through the outer shell tube body 10 and be fixedly connected to the shelf plate 510. The flange structure provided by this utility model provides an installation method for the high-temperature flue gas cooling device.

[0043] The embodiments of this utility model disclosed above are merely illustrative of the present utility model. The embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Obviously, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A high-temperature flue gas cooling device, characterized in that, include: The outer casing tube body has an inlet at one end and an outlet at the other end. A heat exchange cylinder is disposed in and penetrates the outer shell tube body. One end of the heat exchange cylinder serves as an air inlet, and the other end serves as an air outlet. A first cooling water chamber is formed between the heat exchange cylinder and the outer shell tube body. Multiple heat exchange plate assemblies are disposed in and connected to the heat exchange cylinder, and a second cooling water chamber is formed between the multiple heat exchange plate assemblies; as well as The inner shell tube body is connected to the heat exchange plate assembly to be fixed in the heat exchange cylinder. A first flue gas passage is provided in the inner shell tube body, and a second flue gas passage is provided between the heat exchange cylinder and the heat exchange plate assembly. The first flue gas passage and the second flue gas passage are connected and connected to the air inlet and the air outlet. A third cooling water chamber is formed between the inner shell tube body and the heat exchange plate assembly, and the first cooling water chamber, the second cooling water chamber and the third cooling water chamber are connected.

2. The high-temperature flue gas cooling device according to claim 1, characterized in that, The outlet is located on the outer casing and is situated at the position with the longest fluid path between it and the inlet.

3. The high-temperature flue gas cooling device according to claim 2, characterized in that, The water inlet is located at one end of the outer casing tube body near the air outlet, and the water outlet is located at one end of the outer casing tube body near the air inlet.

4. The high-temperature flue gas cooling device according to claim 1, characterized in that, The heat exchanger plate assembly includes: Multiple first heat exchange plates are connected to the inner wall of the heat exchange cylinder; A second heat exchange plate is connected between adjacent first heat exchange plates; and Multiple sealing plates are connected to the same-direction ends of the heat exchange cylinder, the inner shell tube body, the first heat exchange plate, and the second heat exchange plate.

5. A high-temperature flue gas cooling device according to claim 4, characterized in that, The high-temperature flue gas cooling device includes ribs, which are connected to the first heat exchange plates that are adjacent to each other and belong to different heat exchange plate groups.

6. A high-temperature flue gas cooling device according to claim 4, characterized in that, The high-temperature flue gas cooling device includes a partition plate connected to the inner wall of the heat exchange cylinder and the second heat exchange plate, wherein the partition plate is fixed in the second flue gas channel.

7. A high-temperature flue gas cooling device according to claim 1, characterized in that, The high-temperature flue gas cooling device includes multiple baffles connected between the heat exchange cylinder and the outer shell tube body, wherein the baffles are provided with through holes for cooling water to pass through.

8. A high-temperature flue gas cooling device according to claim 1, characterized in that, The walls of the outer casing tube body and the heat exchange cylinder are distributed in parallel. The heat exchange cylinder and the outer casing tube body have a transition tube section. The diameter of the transition tube section increases along the direction away from the cylinder opening of the heat exchange cylinder. The transition tube section is connected to the first flue gas passage and the second flue gas passage.

9. A high-temperature flue gas cooling device according to claim 1, characterized in that, The high-temperature flue gas cooling device includes multiple flange structures, which are located at both ends of the heat exchange cylinder and in the middle of the outer wall of the outer shell tube body.

10. A high-temperature flue gas cooling device according to claim 1, characterized in that, The high-temperature flue gas cooling device includes multiple second flue gas channels, and the multiple second flue gas channels are arranged in a ring array about the axis of the inner shell tube body.

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