A self-cleaning anti-ash-depositing heat exchange tube assembly for tail flue heat exchanger

Abstract

The application discloses a self-cleaning and ash-accumulation-preventing heat exchange pipe assembly for a tail flue heat exchanger, which comprises a heat exchange pipe and an annular scraper, the heat exchange pipe is in a cylindrical shape, elastic telescopic pipes are fixedly connected to two ends of the heat exchange pipe, the two ends of the elastic telescopic pipes are rigid pipes, and the middle part of the elastic telescopic pipes is an elastic pipe; the annular scraper is arranged in a spring shape, the annular scraper is sleeved on the outer wall of the heat exchange pipe, and support frames are fixedly connected to the two ends of the annular scraper. The automatic telescopic cleaning is realized by relying on the impact of heat exchange liquid water flow, manual intervention and shutdown operation are not needed, and the continuity of equipment operation and the heat exchange efficiency are improved.

Description

Technical Field

[0001] This invention relates to the field of heat exchange tube technology, and more specifically to a self-cleaning, dust-proof heat exchange tube assembly for a tail flue heat exchanger. Background Technology

[0002] During operation, the outer wall of the heat exchange tubes of the tail flue heat exchanger easily accumulates a large amount of ash. The ash accumulation will reduce the heat exchange efficiency and increase the operating resistance of the equipment. Traditional cleaning methods require manual cleaning after the machine is shut down, which is cumbersome and affects production efficiency. At the same time, it is difficult to achieve continuous automatic cleaning and cannot meet the demand for efficient and stable heat exchange. Summary of the Invention

[0003] The embodiments of the present invention aim to at least solve one of the technical problems existing in the prior art, and provide a self-cleaning and dust-proof heat exchange tube assembly for a tail flue heat exchanger.

[0004] Embodiments of the present invention provide a self-cleaning, dust-proof heat exchanger tube assembly for a tail flue heat exchanger, comprising: A heat exchange tube, wherein the heat exchange tube is cylindrical, and both ends of the heat exchange tube are fixedly connected to elastic telescopic tubes, wherein both ends of the elastic telescopic tubes are rigid tubes and the middle part of the elastic telescopic tubes is an elastic tube. An annular scraper, which is spring-shaped, is sleeved on the outer wall of the heat exchange tube, and its two ends are respectively fixedly connected to corresponding support frames.

[0005] Optionally, the inner wall of the annular scraper slides in contact with the outer wall of the heat exchange tube, and a first flange is fixedly installed at the end of the rigid tube.

[0006] Optionally, second flanges are fixedly installed on the outer walls of both ends of the heat exchange tube, and the elastic telescopic tube is sealed to the heat exchange tube through the first flange and the second flange.

[0007] Optionally, corresponding support rings are fixedly installed on the outer walls of the rigid tubes at both ends, and a support rod is inserted between the two support rings.

[0008] Optionally, two support rods are provided symmetrically, and the two ends of the annular scraper are respectively welded to the corresponding support frame. The two support frames are respectively fixedly connected to the outer walls of the two corresponding support rings by bolts.

[0009] Optionally, when heat exchange fluid is introduced into the inner wall of the heat exchange tube, the elastic telescopic tube expands and contracts under the impact of the water flow, so that the ash adsorbed on the outer wall of the heat exchange tube is scraped off by the annular scraper.

[0010] Optionally, the elastic tube is made of a high-temperature resistant elastic material, and the extension and retraction stroke of the elastic tube is adapted to the movement stroke of the annular scraper along the axial direction of the heat exchange tube.

[0011] Optionally, the cutting edge of the annular scraper is in close contact with the outer wall of the heat exchange tube, and the spring pitch of the annular scraper is matched with the outer diameter of the heat exchange tube to ensure that no ash accumulation area is missed during the ash scraping process.

[0012] An embodiment of the present invention provides a self-cleaning, dust-proof heat exchange tube assembly for a tail flue heat exchanger. This assembly achieves automatic expansion and contraction cleaning by relying on the impact of the heat exchange fluid water flow, eliminating the need for manual intervention and shutdown operations, thereby improving the continuity of equipment operation and heat exchange efficiency. The annular scraper fully adheres to the outer wall of the heat exchange tube, eliminating cleaning dead corners, effectively preventing dust accumulation, and extending the service life of the heat exchange tube. Attached Figure Description

[0013] Figure 1 This is a schematic front view of a self-cleaning, dust-proof heat exchanger tube assembly for a tail flue heat exchanger. Figure 2 This is a top view schematic diagram of a self-cleaning, dust-proof heat exchange tube assembly for a tail flue heat exchanger. Figure 3 This is an exploded structural diagram of a self-cleaning, dust-proof heat exchanger tube assembly used in a tail flue heat exchanger. Figure 4 A schematic diagram of an elastic telescopic tube structure for a self-cleaning, ash-proof heat exchange tube assembly used in a tail flue heat exchanger. Figure 5 This is a schematic diagram of an annular scraper structure for a self-cleaning, dust-proof heat exchange tube assembly used in a tail flue heat exchanger. Detailed Implementation

[0014] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0015] Example 1: As Figures 1 to 5 As shown, a self-cleaning, dust-proof heat exchanger tube assembly for a tail flue heat exchanger includes: Heat exchange tube 100 is cylindrical. Both ends of heat exchange tube 100 are fixedly connected to elastic expansion tubes. Both ends of the elastic expansion tube are rigid tubes 120, and the middle part of the elastic expansion tube is an elastic tube 121. The annular scraper 300 is spring-shaped and is sleeved on the outer wall of the heat exchange tube 100. The two ends of the annular scraper 300 are respectively fixedly connected to the corresponding support frame 310.

[0016] The specific application scenario of this embodiment is as follows: the heat exchange tube 100 is used to transport the heat exchange fluid to achieve heat exchange; the rigid tube 120 provides fixed support for the elastic telescopic tube; the elastic tube 121 can elastically expand and contract, causing component displacement; the annular scraper 300 is used to scrape off the dust accumulated on the outer wall of the heat exchange tube; and the support frame 310 is used to fix the positions of the two ends of the annular scraper. The two ends of the cylindrical heat exchange tube 100 are connected to the elastic telescopic tube, which consists of the rigid tubes 120 at both ends and the elastic tube 121 in the middle. The spring-shaped annular scraper 300 is fitted onto the outer wall of the heat exchange tube 100, and the two ends of the annular scraper 300 are fixed by the support frame 310, thus constructing a basic self-cleaning and dust-preventing structure, providing a carrier for subsequent cleaning operations.

[0017] Example 2: Figures 3 to 5 As shown, the inner wall of the annular scraper 300 slides in contact with the outer wall of the heat exchange tube 100. The end of the rigid tube 120 is fixedly installed with a first flange 122, and the outer walls of both ends of the heat exchange tube 100 are fixedly installed with second flanges 110. The elastic telescopic tube and the heat exchange tube 100 are sealed and connected through the first flange 122 and the second flange 110.

[0018] The specific application scenario of this embodiment is as follows: The second flange 110 is used for the sealing connection between the heat exchange tube 100 and the elastic expansion tube. The first flange 122 cooperates with the second flange 110 to achieve sealing and fixation, so that the inner wall of the annular scraper 300 slides in contact with the outer wall of the heat exchange tube 100. The first flange 122 is installed at the end of the rigid tube 120, and the second flange 110 is installed on the outer walls of both ends of the heat exchange tube 100. The elastic expansion tube and the heat exchange tube 100 are sealed and connected through the first flange 122 and the second flange 110 to ensure that there is no leakage when the heat exchange fluid is transported, and at the same time, the annular scraper 300 can stably fit against the outer wall of the heat exchange tube 100.

[0019] Example 3: Figures 2 to 5 As shown, corresponding support rings 200 are fixedly installed on the outer walls of the rigid tubes 120 at both ends, and a support rod 210 passes through the two support rings 200. Two support rods 210 are symmetrically arranged. The two ends of the annular scraper 300 are respectively welded to the corresponding support frame 310. The two support frames 310 are respectively fixed to the outer walls of the two corresponding support rings 200 by bolts. When heat exchange fluid is introduced into the inner wall of the heat exchange tube 100, the elastic telescopic tube is driven to expand and contract under the impact of the water flow so that the ash adsorbed on the outer wall of the heat exchange tube 100 is scraped off by the annular scraper 300.

[0020] The specific application scenario of this embodiment is as follows: The support ring 200 is used to install and fix the support rod 210. The support rod 210 is connected to the support ring 200 at both ends to maintain structural stability. The support ring 200 is installed on the outer wall of the rigid tube 120 at both ends. Two symmetrical support rods 210 are inserted between the two support rings 200. The support frame 310 at both ends of the annular scraper 300 is bolted to the outer wall of the two support rings 200. When heat exchange liquid is introduced into the inner wall of the heat exchange tube 100, the water flow impact causes the elastic telescopic tube to expand and contract, thereby causing the annular scraper 300 to move axially along the heat exchange tube 100 and scrape off the accumulated dust adsorbed on the outer wall.

[0021] Example 4: Figure 3 and Figure 4 As shown, the elastic tube 121 is made of high-temperature resistant elastic material, and the extension stroke of the elastic tube 121 is adapted to the axial movement stroke of the annular scraper 300 along the heat exchange tube 100. The cutting edge of the annular scraper 300 is in close contact with the outer wall of the heat exchange tube 100, and the spring pitch of the annular scraper 300 is matched with the outer diameter of the heat exchange tube 100 to ensure that no ash accumulation area is missed during the ash scraping process.

[0022] The specific application scenario of this embodiment is as follows: The elastic tube 121 is made of high temperature resistant elastic material, and its extension stroke is matched with the movement stroke of the annular scraper 300 along the axial direction of the heat exchange tube 100. The cutting edge of the annular scraper 300 is tightly attached to the outer wall of the heat exchange tube 100, and the spring pitch is adapted to the outer diameter of the heat exchange tube 100. During the extension and retraction movement, the accumulated dust is scraped off without dead corners, achieving comprehensive cleaning.

[0023] The working principle of this invention is as follows: During use, heat exchange fluid is introduced into the heat exchange tube 100. The impact of the water flow causes the elastic tube 121 in the middle to elastically expand and contract, driving the rigid tubes 120 at both ends to produce axial displacement. The rigid tubes 120, through the support ring 200 and support rod 210, drive the annular scraper 300 fixed on the support frame 310 to move synchronously along the axial direction of the heat exchange tube 100. The cutting edge of the annular scraper 300 continuously adheres to the outer wall of the heat exchange tube 100, scraping off the adsorbed dust. Self-cleaning can be completed without stopping the machine, ensuring heat exchange efficiency.

[0024] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A self-cleaning, anti-ash-accumulation heat exchanger tube assembly for a tail flue heat exchanger, characterized in that, include: A heat exchange tube, wherein the heat exchange tube is cylindrical, and both ends of the heat exchange tube are fixedly connected to elastic telescopic tubes, wherein both ends of the elastic telescopic tubes are rigid tubes and the middle part of the elastic telescopic tubes is an elastic tube. An annular scraper, which is spring-shaped, is sleeved on the outer wall of the heat exchange tube, and its two ends are respectively fixedly connected to corresponding support frames.

2. The self-cleaning, anti-ash-accumulation heat exchanger tube assembly for a tail flue heat exchanger according to claim 1, characterized in that, The inner wall of the annular scraper slides in contact with the outer wall of the heat exchange tube, and the first flange is fixedly installed at the end of the rigid tube.

3. The self-cleaning, anti-ash-accumulation heat exchanger tube assembly for a tail flue heat exchanger according to claim 2, characterized in that, The heat exchange tube is fixedly mounted with second flanges on both ends of its outer wall, and the elastic telescopic tube is sealed to the heat exchange tube through the first flange and the second flange.

4. A self-cleaning, anti-ash-accumulation heat exchanger tube assembly for a tail flue heat exchanger according to claim 1, characterized in that, The outer walls of the rigid tubes at both ends are respectively fixedly installed with corresponding support rings, and a support rod is inserted between the two support rings.

5. A self-cleaning, anti-ash-accumulation heat exchanger tube assembly for a tail flue heat exchanger according to claim 4, characterized in that, Two support rods are symmetrically arranged. The two ends of the annular scraper are respectively welded to the corresponding support frame. The two support frames are respectively fixedly connected to the outer walls of the two corresponding support rings by bolts.

6. A self-cleaning, anti-ash-accumulation heat exchanger tube assembly for a tail flue heat exchanger according to claim 5, characterized in that, When heat exchange fluid is introduced into the inner wall of the heat exchange tube, the elastic telescopic tube expands and contracts under the impact of the water flow, so that the ash adsorbed on the outer wall of the heat exchange tube is scraped off by the annular scraper.

7. A self-cleaning, anti-ash-accumulation heat exchanger tube assembly for a tail flue heat exchanger according to claim 1, characterized in that, The elastic tube is made of high-temperature resistant elastic material, and the extension and retraction stroke of the elastic tube is adapted to the movement stroke of the annular scraper along the axial direction of the heat exchange tube.

8. A self-cleaning, anti-ash-accumulation heat exchanger tube assembly for a tail flue heat exchanger according to claim 7, characterized in that, The cutting edge of the annular scraper is in close contact with the outer wall of the heat exchange tube, and the spring pitch of the annular scraper is matched with the outer diameter of the heat exchange tube to ensure that no ash accumulation area is missed during the ash scraping process.

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