A kind of anti-fouling self-cleaning corrosion-resistant aluminum-based steam condensing device

Abstract

The application discloses a kind of anti-fouling self-cleaning corrosion-resistant aluminum-based steam condensing device, belong to steam condensing technical field, the anti-fouling self-cleaning corrosion-resistant aluminum-based steam condensing device, including condenser insulation shell, condenser insulation shell side wall is installed with steam inlet and condensate outlet through, and condenser insulation shell upper end and lower end are respectively sealed with upper head and lower head, two groups of sealing pipe plate are embedded and fixed in condenser insulation shell, multiple groups of composite pipe groups are installed between two groups of sealing pipe plate, steam is condensed by heat exchange with the outer surface of composite pipe group in condenser insulation shell inside;Two groups of self-cleaning drive assemblies are installed on the outside of composite pipe group along the axial direction, and the two groups of self-cleaning drive assemblies are longitudinally arranged in the upper and lower segment regions of the composite pipe group;The steam condensing device can self-clean the condensate film on the outer wall of the composite pipe group, avoid the internal fouling and corrosion of the equipment, and prolong the service life of the equipment.

Description

Technical Field

[0001] This invention relates to the field of steam condensation technology, specifically to a scale-resistant, self-cleaning, corrosion-resistant aluminum-based steam condensation device. Background Technology

[0002] Vertical steam condensation units are widely used heat exchange equipment in the chemical, energy and light industries. They mainly introduce steam into the shell side and coolant into the tube side, and achieve heat transfer through the heat exchange tube walls, so that the steam is cooled and condensed into liquid. Its structure is usually composed of a shell, upper and lower end caps, tube sheet and tube bundle. It has strong pressure resistance, stable heat exchange efficiency and convenient operation and maintenance, and is widely used in various steam recovery and cooling processes.

[0003] For example, patent CN115560609B discloses a steam condenser, which includes a shell with an air inlet at the top and a water outlet at the bottom. A condenser tube is arranged inside the shell, and the condenser tube includes several straight condenser tubes and a connector connecting two adjacent straight condenser tubes. The several straight condenser tubes form a ring, and the inlet and outlet ends of the condenser tubes extend out of the shell. A cleaning device is arranged inside the shell, which includes an installation ring slidably arranged inside the shell, several cleaning rings arranged on the installation ring, and a cleaning element arranged in the inner ring of the cleaning ring. The installation ring slides along the length of the straight condenser tubes, and the cleaning rings are sleeved on the outside of the straight condenser tubes.

[0004] For example, patent CN218523973U discloses a steam condenser, including a condenser body, an inlet pipe and an outlet pipe on the condenser body, and a flow divider cavity at both ends of the condenser body. A heat exchange pipe is connected between the flow divider cavities. One flow divider cavity is connected to an air inlet, and the other flow divider cavity is connected to a condensate outlet. A brushing assembly is provided inside the condenser body, which is driven by a drive mechanism to slide on the heat exchange pipe. The brushing assembly includes a sliding shell, which is provided with several through holes for the heat exchange pipe to pass through. A brushing body is fixedly installed in the through holes and fits against the outer wall of the heat exchange pipe. A channel communicating with the sliding shell is provided on the inner wall of the through holes. A drain hose is connected to the sliding shell, and the drain hose is connected to the outlet pipe. A filter is provided between the drain hose and the outlet pipe.

[0005] For example, patent CN116492699B discloses a steam condenser for traditional Chinese medicine extraction, including a spiral water-cooling structure, a rotary linear motion structure, and an elastic contact pressure-reducing structure. A helical spring with an elastic strength essentially matching the low-pressure strength of the concentration tank during operation, fixedly installed at the liquid discharge port, and a valve plate compressed and closed by the helical spring, are also included. This steam condenser for traditional Chinese medicine extraction can be connected to a low-pressure concentration tank, minimizing its impact on the low-pressure state inside the tank. This ensures the normal evaporation and concentration of the traditional Chinese medicine liquid inside the tank. Furthermore, while condensing high-temperature steam, it also provides a suction-driven effect for the high-temperature steam in the concentration tank, allowing for timely condensation. The condensed liquid can then flow back into the concentration tank for further evaporation and concentration, thereby improving the effective utilization rate of the medicinal liquid.

[0006] However, during long-term operation, a condensate film easily forms on the outer wall of the heat exchange tubes of the steam condenser. Impurities adhere to the condensate film, which easily leads to scale formation on the outer wall of the heat exchange tubes. The water film and scale layer will significantly increase the thermal resistance, reduce the heat exchange efficiency of the condenser, and easily cause under-deposit corrosion, thus shortening the service life of the equipment.

[0007] To address the aforementioned issues, there is an urgent need for innovative designs based on the existing steam condensation devices. Summary of the Invention

[0008] The purpose of this invention is to provide a scale-resistant, self-cleaning, corrosion-resistant aluminum-based steam condenser to solve the problem mentioned in the background art where, during long-term operation of the steam condenser, a condensate film easily forms on the outer wall of the heat exchange tubes. Impurities adhere to the condensate film, which easily leads to scale formation on the outer wall of the heat exchange tubes. The water film and scale layer significantly increase thermal resistance, reduce the heat exchange efficiency of the condenser, and easily cause under-deposit corrosion, shortening the service life of the equipment.

[0009] To achieve the above objectives, the present invention provides the following technical solution: a scale-resistant, self-cleaning, corrosion-resistant aluminum-based steam condensing device, comprising a condenser insulation shell, a steam inlet and a condensate outlet installed through the side wall of the condenser insulation shell, and an upper end cap and a lower end cap respectively sealed to the upper and lower ends of the condenser insulation shell; two sets of sealing tube plates are embedded and fixed inside the condenser insulation shell, the two sets of sealing tube plates are correspondingly distributed vertically along the axial direction, and multiple sets of composite tube assemblies are installed between the two sets of sealing tube plates; the steam inside the condenser insulation shell completes the condensation operation by exchanging heat with the outer surface of the composite tube assemblies; two sets of self-cleaning drive components are installed axially on the outside of the composite tube assemblies, the two sets of self-cleaning drive components are longitudinally arranged in the upper and lower sections of the composite tube assemblies, and are used to drive the composite tube assemblies to vibrate locally, so as to achieve self-cleaning treatment of the condensate film on the outside of the composite tube assemblies; the self-cleaning drive components are provided with scraping components for cleaning the condensate droplets in the upper and lower sections of the outer wall of the composite tube assemblies.

[0010] Preferably, the composite tube assembly includes an upper heat exchange tube fixedly installed on an upper sealing tube sheet, and a lower heat exchange tube fixedly installed on a lower sealing tube sheet. Both the upper and lower heat exchange tubes are connected to a middle heat exchange tube through metal corrugated pipes. The middle heat exchange tube is located between the steam inlet and the condensate outlet.

[0011] Preferably, the self-cleaning drive assembly is installed outside the middle section heat exchange tube; the self-cleaning drive assembly includes an upper drive frame that is slidably installed outside the middle section heat exchange tube along the steam inlet axis, and a lower drive frame that is also slidably installed outside the middle section heat exchange tube, the lower drive frame being located directly below the upper drive frame, and the sliding direction of the lower drive frame being perpendicular to the sliding direction of the upper drive frame; a drain valve is installed through the outer wall of the condenser insulation shell.

[0012] Preferably, the inner walls of the upper and lower drive frames are in contact with the outer wall of the middle heat exchange tube, and the upper and lower drive frames are fixed with sliding columns along their sliding direction with the middle heat exchange tube. When the sliding columns move down, they drive the upper and lower drive frames to move back and forth.

[0013] Preferably, four sets of bases are axially fixed to the inner wall of the condenser insulation shell, and curved slides are fixedly installed on the bases, with sliding columns slidably connected in the curved slides; a circular groove communicating with the base located on the steam inlet side is opened.

[0014] Preferably, the condenser insulation shell is provided with a lifting drive assembly for driving the upper and lower drive frames to move longitudinally; both the upper and lower self-cleaning drive assemblies are provided with lifting drive assemblies, and the two sets of lifting drive assemblies are fixedly connected.

[0015] Preferably, the lifting drive assembly includes a vertical frame that is longitudinally connected through the upper sealing tube plate. An upper crossbar and a lower crossbar are fixedly connected to the vertical frame. The upper crossbar is attached to the upper surface of the upper drive frame, and the lower crossbar is attached to the lower surface of the lower drive frame.

[0016] Preferably, a cylinder is fixed to the outside of the upper end cap, and a lifting seat is fixed to the output end of the cylinder. The lifting seat is fixedly connected to the lifting drive assembly.

[0017] Preferably, the upper drive frame has an upper sliding groove in which an upper scraper ring is slidably connected; the lower drive frame has a lower sliding groove in which a lower scraper ring is slidably connected, the upper scraper ring is located directly above the lower scraper ring, and both the upper and lower scraper rings are fitted and sleeved on the outside of the middle heat exchange tube.

[0018] Preferably, multiple limiting protrusions are fixed circumferentially on the outside of the middle heat exchange tube. Four sets of circumferentially distributed limiting protrusions are arranged along the length direction on the outside of the middle heat exchange tube, of which two sets of limiting protrusions are located in the longitudinal movement area of ​​the self-cleaning drive assembly. The self-cleaning drive assembly moves downward so that the lower drive frame contacts and presses against the limiting protrusions, and the self-cleaning drive assembly moves upward so that the upper drive frame contacts and presses against the limiting protrusions.

[0019] Compared with the prior art, the beneficial effects of the present invention are: the anti-scaling self-cleaning corrosion-resistant aluminum-based steam condensing device is equipped with a composite tube assembly. During the process of steam condensation through heat exchange, the middle section of the composite tube assembly is controlled to vibrate, thereby achieving self-cleaning treatment of the condensate film on the outside of the tube wall, avoiding scaling and corrosion on the outside of the tube wall, and extending the service life of the equipment.

[0020] The composite tube assembly consists of an upper heat exchange tube, a lower heat exchange tube, a metal corrugated tube, and a middle heat exchange tube. The middle heat exchange tube is flexibly connected to the upper and lower heat exchange tubes via the metal corrugated tube, allowing the middle heat exchange tube to vibrate in multiple directions. This vibration effect breaks down and peels off the condensate film on the outer wall of the middle heat exchange tube, reducing the thermal resistance caused by the water film adhesion.

[0021] Two sets of self-cleaning drive components are installed axially on the outside of the composite tube assembly. The self-cleaning drive components include an upper drive frame and a lower drive frame, which are slidably sleeved on the outside of the middle heat exchange tube and move in a direction perpendicular to each other. By controlling the reciprocating motion of the upper drive frame and the lower drive frame in the horizontal and vertical directions in the horizontal plane, the middle heat exchange tube can be driven to generate composite vibration in the front-back and left-right directions, which further promotes the rapid shedding and discharge of the condensate film on the outside of the tube wall, thereby improving the condensation heat exchange efficiency.

[0022] The self-cleaning drive assembly is equipped with a scraping component for cleaning condensate droplets in the upper and lower sections of the outer wall of the composite tube assembly. Driven by the lifting drive assembly, the upper and lower drive frames can move longitudinally along the condenser insulation shell, causing the upper and lower scraping rings on them to move downwards against the outer wall of the middle section of the heat exchange tube, scraping off the condensate droplets in the local area of ​​the upper and lower sections of the outer wall of the middle section of the heat exchange tube, breaking the continuous adhesion of the water film on the tube wall, further accelerating the flow and discharge of the water film, and achieving a dual self-cleaning effect of vibration and scraping. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the condenser insulation shell structure of the present invention.

[0024] Figure 2 This is a schematic diagram of the sealing tube sheet structure of the present invention.

[0025] Figure 3 This is a schematic diagram of the composite pipe assembly structure of the present invention.

[0026] Figure 4This is a schematic diagram of the upper heat exchange tube, lower heat exchange tube, and middle heat exchange tube structure of the present invention.

[0027] Figure 5 This is a schematic diagram of the metal bellows structure of the present invention.

[0028] Figure 6 This is a schematic diagram of the self-cleaning drive component structure of the present invention.

[0029] Figure 7 This is a schematic diagram of the limiting protrusion structure of the present invention.

[0030] Figure 8 This is a schematic diagram of the upper and lower driving frame structures of the present invention.

[0031] Figure 9 This is a schematic diagram of the sliding column structure of the present invention.

[0032] Figure 10 This is a schematic diagram of the curved slide structure of the present invention.

[0033] Figure 11 This is a schematic diagram of the upper and lower scraping ring structures of the present invention.

[0034] Figure 12 This is a schematic diagram of the cylinder structure of the present invention.

[0035] In the diagram: 1. Condenser insulation shell; 101. Steam inlet; 102. Condensate outlet; 2. Upper end cap; 3. Lower end cap; 4. Sealing tube sheet; 5. Composite tube assembly; 51. Upper heat exchange tube; 52. Lower heat exchange tube; 53. Metal corrugated pipe; 54. Middle heat exchange tube; 6. Drain valve; 7. Self-cleaning drive assembly; 71. Upper drive frame; 72. Lower drive frame; 8. Lifting drive assembly; 81. Stand; 82. Upper crossbar; 83. Lower crossbar; 9. Base; 91. Circular groove; 10. Curved slide rail; 11. Sliding column; 12. Upper sliding groove; 13. Upper scraper ring; 14. Lower sliding groove; 15. Lower scraper ring; 16. Limiting protrusion; 17. Cylinder; 18. Lifting seat. Detailed Implementation

[0036] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0037] Example 1: Please refer to Figure 1 - Figure 6The present invention provides the following technical solution: a scale-resistant, self-cleaning, corrosion-resistant aluminum-based steam condensing device, comprising a condenser insulation shell 1, a steam inlet 101 and a condensate outlet 102 being installed through the side wall of the condenser insulation shell 1, and an upper end cap 2 and a lower end cap 3 being sealed and connected to the upper and lower ends of the condenser insulation shell 1 respectively; two sets of sealing tube plates 4 are embedded and fixed inside the condenser insulation shell 1, the two sets of sealing tube plates 4 being distributed vertically and vertically along the axial direction, and multiple sets of composite tube groups 5 being installed between the two sets of sealing tube plates 4; the steam inside the condenser insulation shell 1 completes the condensation operation by exchanging heat with the surface of the composite tube groups 5; two sets of self-cleaning drive components 7 are installed axially on the outside of the composite tube groups 5, the two sets of self-cleaning drive components 7 being longitudinally arranged in the upper and lower sections of the composite tube groups 5, used to drive the composite tube groups 5 to vibrate locally, so as to achieve self-cleaning treatment of the condensate film on the outside of the composite tube groups 5; the self-cleaning drive components 7 are provided with scraping components for cleaning the condensate droplets in the upper and lower sections of the outer wall of the composite tube groups 5.

[0038] Steam is controlled to enter the interior of the condenser insulation shell 1 through steam inlet 101. The upper and lower sets of sealing tube plates 4 are sealed at the upper and lower positions of the condenser insulation shell 1, so that the interior of the condenser insulation shell 1 forms a sealed area. The refrigerant is transferred to the interior of the composite tube assembly 5 through the upper end cap 2. The composite tube assembly 5 is made of corrosion-resistant aluminum-based material. The refrigerant flows in the composite tube assembly 5 and finally exits downward through the lower end cap 3. After the steam enters the interior of the condenser insulation shell 1, it contacts the outer wall of the composite tube assembly 5. The steam exchanges heat with the refrigerant flowing in the composite tube assembly 5 to achieve the purpose of steam condensation. Finally, the condensate is discharged outward through the condensate outlet 102.

[0039] During the steam condensation process, some condensate adheres to the outside of the composite tube assembly 5, forming a water film. This water film affects the heat transfer of the composite tube assembly 5, and impurities in the water film adhere to the outside of the composite tube assembly 5, easily forming scale on the outer wall of the composite tube assembly 5 and causing corrosion. This is not conducive to the long-term efficient use of the condensation equipment. Therefore, a self-cleaning drive component 7 is provided on the outside of the composite tube assembly 5. This component can control the local vibration of the composite tube assembly 5, so that the water film on the outside of the composite tube assembly 5 is discharged under the action of vibration, thereby improving its heat exchange efficiency.

[0040] Please see Figure 3 - Figure 5 The composite tube assembly 5 includes an upper heat exchange tube 51 fixedly installed on the upper sealing tube sheet 4, and a lower heat exchange tube 52 fixedly installed on the lower sealing tube sheet 4. Both the upper heat exchange tube 51 and the lower heat exchange tube 52 are connected to the middle heat exchange tube 54 through a metal corrugated pipe 53. The middle heat exchange tube 54 is located between the steam inlet 101 and the condensate outlet 102.

[0041] The middle heat exchange tube 54 is movably connected to the upper heat exchange tube 51 and the lower heat exchange tube 52 via upper and lower metal bellows 53. This allows the middle heat exchange tube 54 to maintain the sealed flow of coolant while allowing for small radial and axial displacements relative to the upper and lower heat exchange tubes 51 and 52, providing freedom of motion for subsequent vibration drive. This avoids direct transmission of vibration stress to the upper and lower heat exchange tubes 51 and 52 and the sealing tube sheet 4, preventing fatigue cracking and sealing failure at the fixed connection points. Furthermore, the flexible connection isolates the condenser insulation shell 1 and the upper end cap from vibration. 2. Due to the influence of the lower end cap 3, there is no need to reinforce the entire equipment against resonance. Meanwhile, the middle heat exchange tube 54 is located in the high-load condensation area between the steam inlet 101 and the condensate outlet 102. This is the main area where steam condenses to form a water film and where impurities adhere and form scale. By concentrating the vibration and self-cleaning functions here, the continuous adhesion of the condensate film can be broken in a targeted manner, reducing thermal resistance and improving heat exchange efficiency. At the same time, it reduces the contact residence time between corrosive media and the tube wall, thereby alleviating under-deposit corrosion and electrochemical corrosion from the root. Under the premise of ensuring long-term stable operation of the equipment, the utilization efficiency of the self-cleaning structure is maximized, and the overall energy consumption and maintenance costs are reduced.

[0042] Please see Figure 6 - Figure 9 The self-cleaning drive assembly 7 is installed outside the middle section heat exchange tube 54; the self-cleaning drive assembly 7 includes an upper drive frame 71 that is slidably installed outside the middle section heat exchange tube 54 along the steam inlet 101, and a lower drive frame 72 that is also slidably installed outside the middle section heat exchange tube 54. The lower drive frame 72 is located directly below the upper drive frame 71, and the sliding direction of the lower drive frame 72 is perpendicular to the sliding direction of the upper drive frame 71; a drain valve 6 is installed through the outer wall of the condenser insulation shell 1.

[0043] The self-cleaning drive assembly 7 is arranged on the outside of the middle section heat exchange tube 54. The upper drive frame 71 and the lower drive frame 72 are respectively mounted on the outside of the middle section heat exchange tube 54 in mutually perpendicular sliding directions. The two can move independently back and forth in the condenser insulation shell 1, forming a bidirectional vibration drive system for the middle section heat exchange tube 54. The horizontal and vertical bidirectional linkage of the upper drive frame 71 and the lower drive frame 72 can drive the middle section heat exchange tube 54 to generate a compound oscillation in the horizontal plane. With the flexible support of the metal corrugated pipe 53, the tube wall generates high-frequency micro-amplitude vibration, thereby destroying the surface tension and continuous adhesion state of the condensate film, causing the water film to fall off quickly and flow downward, greatly reducing the thermal resistance of the tube wall and improving the condensation heat exchange efficiency.

[0044] The drain valve 6 installed through the outer wall of the condenser insulation shell 1 can periodically discharge the condensate, impurities and scale particles deposited inside the shell, preventing impurities from accumulating and clogging the flow channel, aggravating local corrosion, ensuring long-term stable and efficient operation of the equipment, and reducing maintenance frequency and downtime repair costs.

[0045] Please see Figure 6 - Figure 10 The inner walls of the upper drive frame 71 and the lower drive frame 72 are in contact with the outer wall of the middle heat exchange tube 54, and the upper drive frame 71 and the lower drive frame 72 are fixed with sliding columns 11 along their sliding direction with the middle heat exchange tube 54. When the sliding columns 11 move down, they drive the upper drive frame 71 and the lower drive frame 72 to move back and forth. Four sets of bases 9 are axially fixed on the inner wall of the condenser insulation shell 1. Curved slides 10 are fixedly installed on the bases 9, and the sliding columns 11 are slidably connected in the curved slides 10. A circular groove 91 is opened on the base 9 located on the side of the steam inlet 101 and communicates with it.

[0046] When the upper drive frame 71 and the lower drive frame 72 are controlled to reciprocate longitudinally, the sliding columns 11 fixed on the sides of the upper drive frame 71 and the lower drive frame 72 slide along the bending direction in the curved slide 10. During the sliding process, the upper drive frame 71 can be driven to move in the front-back direction, and the lower drive frame 72 can be driven to move in the left-right direction. When the upper drive frame 71 moves back and forth, it drives the middle section heat exchange tube 54 to move back and forth synchronously. When the lower drive frame 72 moves left and right, it drives the middle section heat exchange tube 54 to move left and right synchronously, thereby achieving the purpose of driving the middle section heat exchange tube 54 to move back and forth and left and right reciprocatingly.

[0047] Please see Figure 8 , Figure 9 and Figure 12 The condenser insulation shell 1 is equipped with a lifting drive assembly 8 that drives the upper drive frame 71 and the lower drive frame 72 to move longitudinally. Lifting drive assemblies 8 are also provided on both the upper and lower self-cleaning drive assemblies 7, and the two sets of lifting drive assemblies 8 are fixedly connected. The lifting drive assembly 8 includes a vertical frame 81 that is longitudinally connected to the upper sealing tube plate 4. An upper crossbar 82 and a lower crossbar 83 are fixedly connected to the vertical frame 81. The upper crossbar 82 is fitted against the upper surface of the upper drive frame 71, and the lower crossbar 83 is fitted against the lower surface of the lower drive frame 72. A cylinder 17 is fixedly fixed to the outside of the upper end cap 2. A lifting seat 18 is fixedly fixed to the output end of the cylinder 17, and the lifting seat 18 is fixedly connected to the lifting drive assembly 8.

[0048] The upper drive frame 71 and the lower drive frame 72 are confined between the upper crossbar 82 and the lower crossbar 83. The operating cylinder 17 controls the lifting seat 18 and the lifting drive assembly 8 to move up and down reciprocally. When the upper crossbar 82 and the lower crossbar 83 in the lifting drive assembly 8 move up and down, they can drive the upper drive frame 71 and the lower drive frame 72 to move up and down, so that the sliding column 11 next to the upper drive frame 71 and the lower drive frame 72 moves longitudinally in the direction of pressing the curved slide 10.

[0049] Example 2: Please refer to Figure 10 and Figure 11 Based on Embodiment 1, an upper scraping ring 13 and a lower scraping ring 15 are also disclosed, with the following specific structure: an upper sliding groove 12 is provided in the upper drive frame 71, and an upper scraping ring 13 is slidably connected in the upper sliding groove 12; a lower sliding groove 14 is provided in the lower drive frame 72, and a lower scraping ring 15 is slidably connected in the lower sliding groove 14. The upper scraping ring 13 is located directly above the lower scraping ring 15, and both the upper scraping ring 13 and the lower scraping ring 15 are fitted and sleeved on the outside of the middle heat exchange tube 54.

[0050] During the longitudinal movement of the upper drive frame 71 and the lower drive frame 72, the internally fitted upper scraper ring 13 and lower scraper ring 15 move synchronously up and down, ensuring that the upper scraper ring 13 and lower scraper ring 15 remain in contact with the outer wall of the middle section of the heat exchange tube 54. This scrapes away the condensate film and initial scale buildup in the upper and lower sections of the tube's outer wall along the axial direction, breaking the continuous adhesion of the water film on the tube wall, reducing the thermal resistance caused by the thickening of the water film, and accelerating the downward flow and discharge of condensate along the tube wall. Simultaneously, the upper scraper ring 13 and lower scraper ring 15 are respectively fitted into the upper sliding groove 12 and the lower sliding groove 14, and can move synchronously with the upper drive frame 71 and the lower drive frame 72. The horizontal and vertical sliding synchronous adjustment position of frame 72 can maintain uniform contact with the tube wall even when the middle section heat exchange tube 54 vibrates and swings, avoiding the problem of uneven scraping gap and scraping failure caused by vibration. This synergistic effect of scraping and vibration can not only effectively remove condensate droplets and prevent them from remaining on the tube wall and drying to form scale, but also reduce the residence time of corrosive media in local areas, alleviate under-deposit corrosion, and at the same time reduce the wear of scraping the entire length of the middle section heat exchange tube 54 through local scraping, extend the service life of the equipment, and achieve a balance between efficient self-cleaning and low-loss operation.

[0051] Please see Figure 7 - Figure 11 Multiple limiting protrusions 16 are fixed circumferentially on the outside of the middle heat exchange tube 54. Four sets of circumferentially distributed limiting protrusions 16 are arranged along the length direction on the outside of the middle heat exchange tube 54, of which two sets of limiting protrusions 16 are located in the longitudinal movement area of ​​the self-cleaning drive assembly 7. The self-cleaning drive assembly 7 moves downward so that the lower drive frame 72 contacts and presses against the limiting protrusions 16, and the self-cleaning drive assembly 7 moves upward so that the upper drive frame 71 contacts and presses against the limiting protrusions 16.

[0052] During its up-and-down movement, the self-cleaning drive assembly 7, when it moves down to the end position, contacts and presses against the limiting protrusion 16 at the lower outer position of the middle heat exchange tube 54, pushing the middle heat exchange tube 54 down slightly. When it moves up to the end position, it contacts and presses against the limiting protrusion 16 at the upper outer position of the middle heat exchange tube 54, pushing the middle heat exchange tube 54 up slightly. When the self-cleaning drive assembly 7 reciprocates, it can drive the middle heat exchange tube 54 to vibrate in the up-and-down direction, further assisting in the vibration and discharge of condensate droplets on its outer wall.

[0053] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0054] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A scale-resistant, self-cleaning, corrosion-resistant aluminum-based steam condensing device, comprising a condenser insulation shell (1), wherein a steam inlet (101) and a condensate outlet (102) are installed through the side wall of the condenser insulation shell (1), and an upper end cap (2) and a lower end cap (3) are respectively sealed and connected to the upper and lower ends of the condenser insulation shell (1), characterized in that: The condenser insulation shell (1) is fitted with two sets of sealing tube plates (4), which are distributed vertically along the axial direction. Multiple sets of composite tube groups (5) are installed between the two sets of sealing tube plates (4). The steam inside the condenser insulation shell (1) completes the condensation operation by exchanging heat with the surface of the composite tube group (5). Two sets of self-cleaning drive components (7) are installed on the outside of the composite pipe assembly (5) along the axial direction. The two sets of self-cleaning drive components (7) are longitudinally arranged in the upper and lower sections of the composite pipe assembly (5) to drive the local vibration of the composite pipe assembly (5) in order to achieve self-cleaning treatment of the condensate film on the outside of the composite pipe assembly (5). The self-cleaning drive assembly (7) is equipped with a scraping component for cleaning condensate droplets in the upper and lower sections of the outer wall of the composite pipe assembly (5).

2. The anti-scaling, self-cleaning, corrosion-resistant aluminum-based steam condensing device according to claim 1, characterized in that: The composite tube assembly (5) includes an upper heat exchange tube (51) fixedly installed on the upper sealing tube plate (4), and a lower heat exchange tube (52) fixedly installed on the lower sealing tube plate (4). The upper heat exchange tube (51) and the lower heat exchange tube (52) are connected to the middle heat exchange tube (54) through a metal corrugated pipe (53). The intermediate heat exchange tube (54) is located between the steam inlet (101) and the condensate outlet (102).

3. The anti-scaling, self-cleaning, corrosion-resistant aluminum-based steam condensing device according to claim 2, characterized in that: The self-cleaning drive assembly (7) is installed on the outside of the middle heat exchange tube (54); The self-cleaning drive assembly (7) includes an upper drive frame (71) that is slidably mounted on the outside of the middle heat exchange tube (54) along the steam inlet (101) axial direction. A lower drive frame (72) is also slidably mounted on the outside of the middle heat exchange tube (54). The lower drive frame (72) is located directly below the upper drive frame (71), and the sliding direction of the lower drive frame (72) is perpendicular to the sliding direction of the upper drive frame (71). A drain valve (6) is installed through the outer wall of the condenser insulation shell (1).

4. The anti-scaling, self-cleaning, corrosion-resistant aluminum-based steam condensing device according to claim 3, characterized in that: The inner walls of the upper drive frame (71) and the lower drive frame (72) are in contact with the outer wall of the middle heat exchange tube (54), and the upper drive frame (71) and the lower drive frame (72) are fixed with sliding columns (11) along their sliding direction with the middle heat exchange tube (54). When the sliding columns (11) move down, they drive the upper drive frame (71) and the lower drive frame (72) to move back and forth.

5. The anti-scaling, self-cleaning, corrosion-resistant aluminum-based steam condensing device according to claim 4, characterized in that: The inner wall of the condenser insulation shell (1) is axially fixed with four sets of bases (9), and curved slides (10) are fixedly installed on the bases (9). The sliding column (11) is slidably connected in the curved slides (10). A circular groove (91) is provided on the base (9) located on one side of the steam inlet (101) and communicates with it.

6. The anti-scaling, self-cleaning, corrosion-resistant aluminum-based steam condensing device according to claim 4, characterized in that: The condenser insulation shell (1) is provided with a lifting drive assembly (8) that drives the upper drive frame (71) and the lower drive frame (72) to move longitudinally. Both the upper and lower self-cleaning drive components (7) are equipped with lifting drive components (8), and the two lifting drive components (8) are fixedly connected.

7. The anti-scaling, self-cleaning, corrosion-resistant aluminum-based steam condensing device according to claim 6, characterized in that: The lifting drive assembly (8) includes a vertical frame (81) that is longitudinally connected to the upper sealing tube plate (4). An upper crossbar (82) and a lower crossbar (83) are fixedly connected to the vertical frame (81). The upper crossbar (82) is attached to the upper surface of the upper drive frame (71), and the lower crossbar (83) is attached to the lower surface of the lower drive frame (72).

8. The anti-scaling, self-cleaning, corrosion-resistant aluminum-based steam condensing device according to claim 7, characterized in that: The upper end cap (2) is externally fixed with a cylinder (17), and the output end of the cylinder (17) is fixed with a lifting seat (18), which is fixedly connected to the lifting drive assembly (8).

9. A scale-resistant, self-cleaning, corrosion-resistant aluminum-based steam condenser according to claim 5, characterized in that: The upper drive frame (71) is provided with an upper sliding groove (12), and an upper scraper ring (13) is fitted and slidably connected in the upper sliding groove (12). The lower drive frame (72) has a sliding groove (14) and a lower scraper ring (15) is fitted and slidably connected in the sliding groove (14). The upper scraper ring (13) is located directly above the lower scraper ring (15), and both the upper scraper ring (13) and the lower scraper ring (15) are fitted and sleeved on the outside of the middle heat exchange tube (54).

10. A scale-resistant, self-cleaning, corrosion-resistant aluminum-based steam condensing device according to claim 9, characterized in that: Multiple limiting protrusions (16) are fixed around the outside of the middle heat exchange tube (54) along the circumferential direction. Four sets of circumferentially distributed limiting protrusions (16) are arranged around the outside of the middle heat exchange tube (54) along the length direction, of which two sets of limiting protrusions (16) are located in the longitudinal movement area of ​​the self-cleaning drive assembly (7). The self-cleaning drive assembly (7) moves downward so that the lower drive frame (72) contacts and presses against the limiting protrusion (16), and the self-cleaning drive assembly (7) moves upward so that the upper drive frame (71) contacts and presses against the limiting protrusion (16).

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