Novel heat exchange tube for waste heat boiler

Abstract

The novel heat exchange tube for the waste heat boiler comprises a heat exchange tube body, an input port is formed in one side of the heat exchange tube body, an output port is formed in the side, away from the input port, of the heat exchange tube body, a transversely-arranged rotating shaft is arranged in the heat exchange tube body and connected with the heat exchange tube body through an installation frame, and a plurality of evenly-distributed blocking plates are arranged on the outer wall of the rotating shaft in a sleeved mode. The flue gas heat exchanger has the beneficial effects that the circulation speed of high-temperature flue gas entering the heat exchange pipe can be reduced by arranging the baffle, so that the high-temperature flue gas can be in full contact with the heat exchange pipe, and then the heat exchange efficiency of the heat exchange pipe is improved, and the flue gas can blow the spiral fan blades to automatically rotate when entering the heat exchange pipe by arranging the rotating shaft, the spiral fan blades and the scraping assembly; and the spiral fan blades can drive the scraping assembly to rotationally scrape the inner wall of the heat exchange pipe through the rotating shaft, dust and impurities in the smoke are prevented from being attached to the inner wall of the heat exchange pipe, and the heat exchange efficiency of the heat exchange pipe is further improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to flue gas waste heat utilization technical field, concretely related to a novel heat exchange pipe for waste heat boiler. BACKGROUND

[0002] In the field of metallurgy, energy and chemical industry, a large amount of high-temperature flue gas will be generated in the process of fuel combustion. The waste heat recovery of these high-temperature flue gas helps enterprises to save energy, improve efficiency and reduce cost. Waste heat boiler is an important device for flue gas waste heat recovery. The waste heat boiler mainly uses its heat exchange tube to realize the heat exchange between the high-temperature flue gas in the tube and the liquid outside the tube.

[0003] According to the novel heat exchange pipe for waste heat boiler disclosed by Chinese patent CN202021288506.4, the application comprises a heat exchange pipe and a flow guide device arranged inside the heat exchange pipe. The heat exchange pipe is a pipe body with two open ends. The two ends of the heat exchange pipe are respectively a flue gas inlet and a flue gas outlet. The flow guide device is a spiral ribbon arranged at the axis of the pipe body. A through shaft is also arranged inside the pipe body along the axis direction. The through shaft is connected with the pipe body. The flow guide device is connected with the through shaft to fix it inside the pipe body. On the basis of the traditional heat exchange pipe, the flow guide device and the acceleration device are added. The fixing part plays a fixing role on the flow guide device. The acceleration device can improve the flow rate of the flue gas and play a certain role in improving the heat exchange efficiency in the tube. The flow guide device plays a role in forcing the fluid to form spiral flow in the tube. At the same time, additional radiation heat exchange is generated between its surface and the inner wall of the heat exchange pipe, which improves the heat exchange between the high-temperature flue gas and the heat exchange pipe. When the flue gas passes through the heat exchange pipe in use, the dust and impurities in the flue gas are easy to adhere to the inner wall of the heat exchange pipe, which will affect the heat exchange efficiency of the heat exchange pipe.

[0004] For the problems in the related art, there is no effective solution at present. UTILITY MODEL CONTENT

[0005] In view of the problems in the related art, the utility model puts forward a novel heat exchange pipe for waste heat boiler to overcome the above technical problems existing in the prior art.

[0006] Therefore, the utility model adopts the following specific technical schemes:

[0007] A novel heat exchange pipe for waste heat boiler, comprising a heat exchange pipe, an input port is formed on one side of the heat exchange pipe, an output port is formed on the side of the heat exchange pipe away from the input port, a horizontal shaft is arranged in the heat exchange pipe, the horizontal shaft is connected with the heat exchange pipe through a mounting frame, a plurality of evenly distributed blocking plates are sleeved on the outer wall of the horizontal shaft, a scraping assembly matched with the heat exchange pipe is arranged between every two blocking plates and on the outer wall of the horizontal shaft, and a spiral fan blade is arranged on the side of the horizontal shaft close to the input port.

[0008] Preferably, the barrier plate is connected with the rotating shaft through a bearing, and the barrier plate is fixedly connected with the inner wall of the heat exchange pipe.

[0009] Preferably, the scraping assembly comprises symmetrically arranged mounting sleeves arranged between the barrier plates and located on the outer wall of the rotating shaft, and the mounting sleeves are provided with scraping plates matched with the heat exchange pipe at the ends away from the rotating shaft, and the scraping plates are connected with the mounting sleeves through elastic assemblies.

[0010] Preferably, the elastic assembly comprises a sliding block matched with the mounting sleeve and arranged in the mounting sleeve, a spring arranged at the bottom end of the sliding block, and a connecting rod arranged at the top end of the sliding block and extending to the outside of the mounting sleeve and connected with the scraping plate.

[0011] Preferably, the sliding block is connected with the mounting sleeve through the spring, and the mounting sleeve is provided with a sliding hole matched with the connecting rod at the top end.

[0012] Preferably, the sliding block is a rectangular block.

[0013] The beneficial effects of the heat exchange pipe for a waste heat boiler are as follows: the barrier plate can reduce the flow speed of high-temperature flue gas entering the heat exchange pipe, so that the high-temperature flue gas can fully contact the heat exchange pipe and the heat exchange efficiency is improved; when the flue gas enters the heat exchange pipe, the rotating shaft, the spiral fan blade and the scraping assembly are arranged to blow the spiral fan blade to automatically rotate, the spiral fan blade drives the scraping assembly to rotate and scrape the inner wall of the heat exchange pipe through the rotating shaft, dust and impurities in the flue gas are prevented from adhering to the inner wall of the heat exchange pipe, and the heat exchange efficiency of the heat exchange pipe is further improved. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments. Obviously, the drawings in the following description only constitute some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without creative labor.

[0015] Figure 1 is a whole structure schematic view of a novel heat exchange pipe for a waste heat boiler according to an embodiment of the present application;

[0016] Figure 2 is a sectional view of a novel heat exchange pipe for a waste heat boiler according to an embodiment of the present application;

[0017] Figure 3 is Figure 2 is a local enlarged schematic view of A in FIG.

[0018] Figure 4 This is a schematic diagram of the structure of a rotating shaft in a novel heat exchange tube for a waste heat boiler according to an embodiment of the present utility model.

[0019] In the picture:

[0020] 1. Heat exchange tube; 2. Inlet; 3. Outlet; 4. Shaft; 5. Mounting bracket; 6. Baffle plate; 7. Spiral fan blade; 8. Mounting sleeve; 9. Scraper; 10. Slider; 11. Spring; 12. Connecting rod. Detailed Implementation

[0021] To further illustrate the various embodiments, the present invention provides accompanying drawings, which are part of the disclosure of the present invention. These drawings are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, those skilled in the art should be able to understand other possible implementation methods and the advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are usually used to represent similar components.

[0022] According to an embodiment of the present invention, a novel heat exchange tube for a waste heat boiler is provided.

[0023] Example 1;

[0024] like Figures 1-4 As shown, the novel heat exchange tube for waste heat boiler according to an embodiment of the present utility model includes a heat exchange tube 1, an inlet 2 on one side of the heat exchange tube 1, an outlet 3 on the side of the heat exchange tube 1 away from the inlet 2, a horizontally arranged rotating shaft 4 in the heat exchange tube 1, the rotating shaft 4 being connected to the heat exchange tube 1 via a mounting bracket 5, a plurality of evenly distributed baffle plates 6 being fitted on the outer wall of the rotating shaft 4, a scraping assembly matching the heat exchange tube 1 being provided between each pair of baffle plates 6 and located on the outer wall of the rotating shaft 4, and a spiral fan blade 7 being provided on the side of the rotating shaft 4 near the inlet 2.

[0025] Example 2;

[0026] like Figures 1-4As shown, including heat exchange pipe 1, heat exchange pipe 1 side is provided with input port 2, heat exchange pipe 1 is provided with output port 3 away from input port 2 side, heat exchange pipe 1 is provided with transversely arranged shaft 4, shaft 4 is connected with heat exchange pipe 1 through mounting bracket 5, shaft 4 outer wall is provided with a plurality of evenly distributed blocking plate 6, two two blocking plate 6 between and located on the outer wall of shaft 4 is provided with the scraping assembly matched with heat exchange pipe 1, shaft 4 is provided with spiral fan blade 7 close to input port 2 side. Blocking plate 6 is connected with shaft 4 through bearing, blocking plate 6 is fixedly connected with the inner wall of heat exchange pipe 1. The scraping assembly comprises two two blocking plate 6 between and located on the outer wall of shaft 4 is provided with symmetrically arranged mounting sleeve 8, mounting sleeve 8 is provided with scraping plate 9 matched with heat exchange pipe 1 away from shaft 4 end, scraping plate 9 is connected with mounting sleeve 8 through elastic component. The elastic component comprises the sliding block 10 matched with the mounting sleeve 8 in the mounting sleeve 8, the bottom end of the sliding block 10 is provided with spring 11, the top end of the sliding block 10 is provided with connecting rod 12, the top end of the connecting rod 12 extends to the outside of the mounting sleeve 8 and is connected with the scraping plate 9. The sliding block 10 is connected with the mounting sleeve 8 through the spring 11, and the top end of the mounting sleeve 8 is provided with a sliding hole matched with the connecting rod 12. The sliding block 10 is a rectangular block.

[0027] In actual application, when heat exchange, high temperature flue gas enters heat exchange pipe 1 through input port 2, the high temperature flue gas entering heat exchange pipe 1 will be staggered by blocking plate 6, thereby reducing the flue gas flow speed, so that the flue gas and heat exchange pipe 1 can be in contact for a longer time to improve the heat exchange efficiency. At the same time, when the flue gas enters the heat exchange pipe 1, the spiral fan blade 7 will be blown to rotate, the spiral fan blade 7 drives the shaft 4 to rotate, the shaft 4 drives the mounting sleeve 8 to rotate, the mounting sleeve 8 drives the scraping plate 9 to rotate through the connecting rod 12 to rotate and scrape the inner wall of the heat exchange pipe 1. At the same time, the connecting rod 12 is elastically extruded by the spring 11 and the sliding block 10, so that the connecting rod 12 drives the scraping plate 9 to tightly contact the inner wall of the heat exchange pipe 1 to improve the scraping effect. By arranging the blocking plate, the flow speed of the high temperature flue gas entering the heat exchange pipe can be reduced, so that the high temperature flue gas can fully contact the heat exchange pipe to improve the heat exchange efficiency. By arranging the shaft, the spiral fan blade and the scraping assembly, when the flue gas enters the heat exchange pipe, the spiral fan blade will be blown to rotate automatically, the spiral fan blade will drive the scraping assembly to rotate and scrape the inner wall of the heat exchange pipe through the shaft, so as to prevent the dust and impurities in the flue gas from adhering to the inner wall of the heat exchange pipe, and further improve the heat exchange efficiency of the heat exchange pipe.

[0028] In summary, by means of the above technical scheme of the utility model, the flow speed of the high temperature flue gas entering the heat exchange pipe can be reduced by arranging the blocking plate, so that the high temperature flue gas can fully contact the heat exchange pipe to improve the heat exchange efficiency. By arranging the shaft, the spiral fan blade and the scraping assembly, when the flue gas enters the heat exchange pipe, the spiral fan blade will be blown to rotate automatically, the spiral fan blade will drive the scraping assembly to rotate and scrape the inner wall of the heat exchange pipe through the shaft, so as to prevent the dust and impurities in the flue gas from adhering to the inner wall of the heat exchange pipe, and further improve the heat exchange efficiency of the heat exchange pipe.

[0029] The above merely describes preferred embodiments of the present application and is not intended to limit the present application, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A novel heat exchange tube for a waste heat boiler, characterized in that, The device includes a heat exchange tube (1), an inlet (2) on one side of the heat exchange tube (1), an outlet (3) on the side of the heat exchange tube (1) away from the inlet (2), a horizontally arranged rotating shaft (4) in the heat exchange tube (1), the rotating shaft (4) being connected to the heat exchange tube (1) via a mounting bracket (5), a plurality of evenly distributed baffles (6) being fitted on the outer wall of the rotating shaft (4), a scraping assembly matching the heat exchange tube (1) being provided between each pair of baffles (6) and on the outer wall of the rotating shaft (4), and a spiral fan blade (7) being provided on the side of the rotating shaft (4) near the inlet (2).

2. The novel heat exchange tube for a waste heat boiler according to claim 1, characterized in that, The barrier plate (6) is connected to the rotating shaft (4) via a bearing, and the barrier plate (6) is fixedly connected to the inner wall of the heat exchange tube (1).

3. The novel heat exchange tube for a waste heat boiler according to claim 1, characterized in that, The scraping assembly includes symmetrically arranged mounting sleeves (8) between the two barrier plates (6) and located on the outer wall of the rotating shaft (4). The end of the mounting sleeve (8) away from the rotating shaft (4) is provided with a scraper (9) that matches the heat exchange tube (1). The scraper (9) is connected to the mounting sleeve (8) through an elastic component.

4. A novel heat exchange tube for a waste heat boiler according to claim 3, characterized in that, The elastic component includes a matching slider (10) provided in the mounting sleeve (8), the bottom end of the slider (10) is provided with a spring (11), the top end of the slider (10) is provided with a connecting rod (12), and the top end of the connecting rod (12) extends to the outside of the mounting sleeve (8) and connects with the scraper (9).

5. A novel heat exchange tube for a waste heat boiler according to claim 4, characterized in that, The slider (10) is connected to the mounting sleeve (8) via the spring (11), and the top of the mounting sleeve (8) has a sliding hole that matches the connecting rod (12).

6. A novel heat exchange tube for a waste heat boiler according to claim 4, characterized in that, The slider (10) is a rectangular block.

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