A heat source tower solution concentration system combined with boiler flue gas condensing heat

Abstract

The utility model belongs to the technical field of flue gas waste heat recovery and solution concentration, disclose a kind of heat source tower solution concentration system in combination with boiler flue gas condensation heat, including atmospheric hot water boiler, flue gas condensation recovery mechanism, regeneration mechanism and solution circulation pipeline.Atmospheric hot water boiler is connected with flue gas condensation recovery mechanism, and finned tube is installed in mechanism.The core lies in that flue gas condensation recovery mechanism is equipped with cleaning assembly, motor drive turntable and rotating arm, drive moving rod reciprocating linear motion in finned tube, and the scraper of moving rod end portion is tightly attached to tube wall and removes scale body, and regeneration mechanism carries out gas-liquid separation using steam-water separator with guide vane and demister inside.The utility model uses flue gas waste heat as concentration heat source, effectively solves the problem of heat exchange efficiency reduction caused by easy crystallization and fouling in finned tube inner wall using automatic cleaning assembly, realizes the accurate control and efficient regeneration of solution concentration, and has the beneficial effects of stable operation, energy saving and environmental protection.

Description

Technical Field

[0001] This utility model relates to the technical field of flue gas waste heat recovery and solution concentration, and in particular to a heat source tower solution concentration system that combines boiler flue gas condensation heat. Background Technology

[0002] In current industrial production, especially in applications using boilers for heating, atmospheric pressure hot water boilers generate a large amount of high-temperature flue gas during operation. This flue gas is typically released directly into the atmosphere, resulting in significant heat loss, low energy efficiency, and environmental pollution from the waste heat. With the increasing national emphasis on energy conservation, emission reduction, and comprehensive energy utilization, effectively recovering and utilizing this low-temperature waste heat has become a significant technological challenge.

[0003] Heat source tower solution concentration, a common industrial process, requires a continuous and stable input of heat energy to evaporate moisture and increase solution concentration. Traditional heat source tower solution concentration systems often employ independent energy supply methods, such as fuel oil, natural gas, or electric heating. This not only increases system operating costs but also contradicts the major trend of industrial energy conservation and emission reduction. Therefore, combining the condensation heat of low-temperature flue gas from boilers with the solution concentration system, using industrial waste heat as the main heat source for the concentration system, is an ideal solution for achieving system energy conservation and reducing operating costs.

[0004] However, heat exchangers are required to transfer heat from high-temperature flue gas to the solution to be concentrated. During the evaporation process, dissolved salts or impurities in the solution precipitate out along with the evaporating water, easily forming scale or crystals on the inner wall of the heat exchanger. The presence of this scale significantly increases heat exchange resistance, leading to a sharp decline in heat exchange efficiency, which in turn affects the operational stability and economy of the entire concentration system. In severe cases, it may even require shutdown for chemical or mechanical cleaning, resulting in high maintenance costs. Most existing concentration heat exchange systems lack an efficient, automated, and online internal cleaning mechanism, making it difficult to effectively address scaling during continuous system operation. Therefore, a heat source tower solution concentration system incorporating boiler flue gas condensation heat is proposed to solve these problems. Utility Model Content

[0005] In view of the problem that the existing heat source tower solution concentration system lacks an effective automated cleaning mechanism, which leads to easy scaling of heat exchange components and reduced heat exchange efficiency, affecting the stable operation and economic benefits of the system, this utility model aims to provide a heat source tower solution concentration system with improved structure that can effectively solve the above problems by combining boiler flue gas condensation heat.

[0006] This utility model provides a heat source tower solution concentration system that combines boiler flue gas condensation heat, including an atmospheric pressure hot water boiler, a flue gas condensation recovery mechanism, a solution pipe before regeneration, a solution return pipe mechanism, and a regeneration mechanism.

[0007] The flue gas condensation recovery mechanism is equipped with finned tubes. The flue outlet of the atmospheric pressure hot water boiler is connected to the flue gas inlet of the flue gas condensation recovery mechanism. The liquid inlet of the finned tube is sealed and connected to the solution pipe before regeneration. The liquid outlet of the finned tube is sealed and connected to the solution return pipe mechanism. The liquid outlet of the solution return pipe mechanism is connected to the solution inlet of the regeneration mechanism.

[0008] The flue gas condensation and recovery mechanism includes a cleaning component. This cleaning component comprises a motor, a turntable, a rotating arm, a moving rod, and a scraper.

[0009] The motor is fixedly installed inside the flue gas condensation and recovery mechanism and drives the turntable to rotate. The center of the turntable is fixedly connected to the output end of the motor. The eccentric position of the turntable is rotatably connected to one end of a rotating arm, and the other end of the rotating arm is rotatably connected to one end of a moving rod. A limit block is fixedly connected to the inner wall of the finned tube, and the moving rod passes through the limit block and slides against the inner wall of the limit block. The scraper is fixedly connected to the end of the moving rod away from the rotating arm and abuts against the inner wall of the finned tube. Driven by the turntable, the moving rod reciprocates linearly along the axis of the finned tube. This crank-slider transmission structure ensures that the scraper can efficiently and stably reciprocate and clean the inner wall of the finned tube.

[0010] Preferably, a cleaning pad is fixedly connected to the outer wall of the scraper. The cleaning pad is preferably made of polytetrafluoroethylene (PTFE), and the scraper is preferably made of stainless steel. The PTFE cleaning pad has the characteristics of high temperature resistance and low friction, which can closely adhere to the inner wall of the finned tube, effectively remove scale, and protect the tube wall from scratches.

[0011] Preferably, the flue gas condensation and recovery mechanism adopts a double-layer protective structure, including a first protective shell and a second protective shell with an inner and outer nested structure. The first protective shell and the second protective shell are fixedly connected by reinforcing ribs. The second protective shell and the cleaning component are both located inside the finned tube, and the motor is fixedly installed on the inner wall of the second protective shell.

[0012] Preferably, the regeneration mechanism includes a regeneration water pump, a regeneration electric regulating valve, and a steam-water separator. The regeneration water pump and the regeneration electric regulating valve are sequentially fixedly installed on the solution pipe before regeneration via flanges, for precisely controlling the flow rate and pressure of the solution. The outlet end of the solution return pipe mechanism is sealed to the mixed liquid inlet end of the steam-water separator.

[0013] Preferably, the regeneration mechanism further includes a guide plate and a demister. The guide plate is fixedly installed inside the gas-water separator by welding, and the demister is fixedly installed inside the gas-water separator by a bracket and located below the guide plate. This structure enables efficient gas-liquid separation of the heated solution mixture, and the purity of the concentrated solution is improved by changing the flow direction through the guide plate and further purifying it through the demister.

[0014] Preferably, the liquid outlet end of the steam-water separator is sealed to one end of the solution supply pipe, and the other end of the solution supply pipe is connected to a second inlet solution pipe, which is used to connect to the solution inlet end of the heat source tower. The gas outlet end of the steam-water separator is welded to a steam pipe for discharging the separated steam, forming a complete circulation path for the solution.

[0015] Preferably, the system further includes a dilute solution tank, a concentrated solution tank, a concentration control device, and a first outlet solution main pipe. One end of the first outlet solution main pipe is connected to the solution outlet end of the heat source tower, and the other end is connected to the inlet end of the solution pipe before regeneration. The concentration control device is connected to the dilute solution tank and the concentrated solution tank respectively through a dedicated dispensing pipeline to achieve real-time and precise control of the solution concentration.

[0016] Preferably, the bottom of the flue gas condensation recovery mechanism is welded with a condensate drain outlet. The system also includes a liquid collection pipe, one end of which is connected to a concentrated solution tank for concentrating and purifying the salt solution and storing it in the concentrated solution tank. The condensate drain outlet is used to discharge water vapor condensate from the flue gas, while the liquid collection pipe facilitates solution recovery during system maintenance.

[0017] This utility model has the following beneficial effects: 1. This utility model, by setting up a heat exchange mechanism that combines the condensation heat of boiler flue gas, uses the high-temperature flue gas discharged from the boiler as a heat source, which solves the problems of low energy utilization and ineffective utilization of flue gas waste heat in the prior art, and achieves the technical effects of energy saving, emission reduction and improved system economy.

[0018] 2. This utility model solves the problem of reduced heat exchange efficiency caused by solution scaling in existing heat exchange components during long-term operation by setting a crank-slider cleaning assembly consisting of a motor, turntable, rotating arm, moving rod and scraper inside the finned tube. It achieves the technical effect of automated, efficient and reciprocating scraping cleaning of the inner wall of the finned tube, ensuring the long-term stable operation of the system.

[0019] 3. This utility model, through the synergistic effect of the gas-liquid separator, guide plate and demister in the regeneration mechanism, as well as the concentration control device connecting the dilute solution tank and the concentrated solution tank, solves the problems of low solution concentration and separation efficiency and inaccurate concentration control in the existing system, and achieves the technical effect of realizing efficient gas-liquid separation and precise control of solution concentration.

[0020] 4. This utility model integrates an atmospheric pressure hot water boiler, a flue gas condensation and recovery mechanism, a regeneration mechanism, and a solution circulation pipeline to construct a complete closed-loop system for solution concentration using waste heat from flue gas. This solves the problem of the lack of an overall solution in the existing technology, from waste heat utilization to concentration and regeneration, and then to concentration control. It achieves the technical effect of complete solution, reasonable process, and high practicality.

[0021] 5. This utility model, by adopting an inner and outer nested protective shell structure, places the core heat exchange component and cleaning component inside the protective shell, and sets up a condensate drain outlet and a liquid collection pipe, which solves the problems of insufficient compactness and inconvenient maintenance of the existing system structure, and achieves the technical effects of compact structure, which is conducive to protecting the core components, and convenient for maintenance and solution recovery. Attached Figure Description

[0022] Figure 1 This is a three-dimensional schematic diagram of a heat source tower solution concentration system that combines boiler flue gas condensation heat according to the present invention. Figure 2 This is a schematic diagram of the structure of a regenerated water pump in a heat source tower solution concentration system that combines boiler flue gas condensation heat, as proposed in this utility model. Figure 3 This is a schematic diagram of the structure of a steam-water separator in a heat source tower solution concentration system that combines boiler flue gas condensation heat, as proposed in this utility model. Figure 4 This is a schematic diagram of the structure of a finned tube in a heat source tower solution concentration system that combines boiler flue gas condensation heat, as proposed in this utility model. Figure 5 This is a schematic diagram of the structure of a protective shell for a heat source tower solution concentration system that combines boiler flue gas condensation heat, as proposed in this utility model. Figure 6 This is a schematic diagram of the rotating disc of a heat source tower solution concentration system that combines boiler flue gas condensation heat according to the present invention. Figure 7 for Figure 6 Enlarged view of point A in the middle.

[0023] Legend: 1. Atmospheric pressure hot water boiler; 2. Flue gas condensation recovery mechanism; 21. Finned tube; 22. Condensate discharge port; 23. Protective shell one; 24. Protective shell two; 25. Cleaning components; 251. Motor; 252. Turntable; 253. Rotating arm; 254. Moving rod; 255. Scraper; 256. Cleaning pad; 257. Limiting block; 3. Solution pipe before regeneration; 4. Solution return pipe mechanism; 41. Steam pipe; 42. Solution supply pipe; 5. Outlet solution main pipe one; 6. Inlet solution main pipe two; 7. Dilute solution tank; 8. Concentration control device; 9. Concentrated solution tank; 10. Regeneration mechanism; 101. Regeneration water pump; 102. Regeneration electric regulating valve; 103. Steam-water separator; 104. Demister; 105. Baffle plate; 11. Liquid collection pipe. Detailed Implementation

[0024] 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 of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example

[0025] Reference Figures 1 to 7 This utility model provides a heat source tower solution concentration system that combines boiler flue gas condensation heat. It aims to solve the problems of low energy utilization rate of existing solution concentration systems, ineffective utilization of waste heat from flue gas emitted by atmospheric pressure hot water boilers causing thermal pollution, and the easy formation of residues or scale on the inner wall of heat exchange components during long-term operation, resulting in reduced heat exchange efficiency, as well as insufficient precision in solution concentration control.

[0026] A heat source tower solution concentration system combining boiler flue gas condensation heat includes an atmospheric pressure hot water boiler 1, a flue gas condensation recovery mechanism 2, a solution pipe before regeneration 3, a solution return pipe mechanism 4, a regeneration mechanism 10, a dilute solution tank 7, a concentrated solution tank 9, a concentration control device 8, a first solution outlet pipe 5, a second solution inlet pipe 6, a liquid collection pipe 11, and a condensate discharge port 22. The flue outlet of the atmospheric pressure hot water boiler 1 is connected to the flue gas inlet of the flue gas condensation and recovery mechanism 2. The flue gas condensation and recovery mechanism 2 is equipped with a finned tube 21. The liquid inlet of the finned tube 21 is sealed and connected to the solution pipe 3 before regeneration. The liquid outlet of the finned tube 21 is sealed and connected to the solution return pipe mechanism 4. One end of the solution outlet main pipe 5 is used to connect to the solution outlet of the heat source tower. The other end of the solution outlet main pipe 5 is connected to the inlet of the solution pipe 3 before regeneration.

[0027] The regeneration mechanism 10 includes a regeneration water pump 101, a regeneration electric regulating valve 102, and a steam-water separator 103. The regeneration water pump 101 and the regeneration electric regulating valve 102 are sequentially fixedly installed on the solution pipe 3 before regeneration through flanges. The outlet end of the solution return pipe mechanism 4 is connected to the solution inlet end of the regeneration mechanism 10 and is sealed to the mixed liquid inlet end of the steam-water separator 103.

[0028] The solution return pipe mechanism 4 includes a steam pipe 41 and a solution supply pipe 42. The gas outlet end of the steam-water separator 103 is welded to the steam pipe 41, which is used to discharge the separated steam. The liquid outlet end of the steam-water separator 103 is sealed to one end of the solution supply pipe 42. The other end of the solution supply pipe 42 is connected to the second inlet solution pipe 6, which is used to connect to the solution inlet end of the heat source tower. The concentration control device 8 is connected to the dilute solution tank 7 and the concentrated solution tank 9 through a dedicated mixing pipeline. The bottom of the flue gas condensation recovery mechanism 2 is welded to the condensate discharge port 22. One end of the liquid collection pipe 11 is connected to the concentrated solution tank 9 to concentrate and purify the salt solution and store it in the concentrated solution tank 9.

[0029] The flue gas condensation recovery mechanism 2 adopts a double protection structure, including an outer protective shell 23 and an inner protective shell 24. The protective shell 23 and the protective shell 24 are nested in an inner and outer structure and are fixedly connected by reinforcing ribs to ensure structural stability. The protective shell 24 is fixedly installed inside the finned tube 21. The bottom of the flue gas condensation recovery mechanism 2 is welded to the condensate discharge port 22.

[0030] The cleaning component 25 is installed inside the protective shell 24 inside the flue gas condensation recovery mechanism 2. It realizes automated scraping and cleaning of the inner wall of the finned tube 21. The cleaning component 25 includes a motor 251, a turntable 252, a rotating arm 253, a moving rod 254, a scraper 255, a cleaning pad 256, and a limiting block 257. The motor 251 is fixedly installed on the inner wall of the protective shell 24, and its output end is fixedly connected to the center of the turntable 252. The eccentric position of the turntable 252 is rotatably connected to one end of the rotating arm 253, and the other end of the rotating arm 253 is rotatably connected to one end of the moving rod 254. The turntable 252 converts the rotational motion of the motor 251 into the reciprocating motion of the moving rod 254 through the rotatably connected rotating arm 253.

[0031] A limiting block 257 is fixedly connected to the inner wall of the finned tube 21. A moving rod 254 passes through the limiting block 257 and is slidably connected to the inner wall of the limiting block 257. The function of the limiting block 257 is to provide precise guidance and limitation for the moving rod 254, ensuring that it moves smoothly back and forth along the axial direction of the finned tube 21. The end of the moving rod 254 away from the rotating arm 253 extends into the interior of the finned tube 21 and is fixedly connected to the stainless steel scraper 255.

[0032] A cleaning pad 256 made of polytetrafluoroethylene is fixedly connected to the outer wall of the scraper 255. The scraper 255 and the cleaning pad 256 abut against the inner wall of the finned tube 21. The polytetrafluoroethylene material allows the cleaning pad 256 to withstand high temperatures and reduces friction through its own elasticity while avoiding scratching the tube wall. The stainless steel scraper 255 enhances the scraping force. During operation, the motor 251 drives the turntable 252 to rotate. Through the cooperation of the rotating arm 253 and the limit block 257, the moving rod 254 drives the scraper 255 and the cleaning pad 256 to reciprocate along the axial direction inside the finned tube 21, effectively scraping away the scale or crystalline precipitates attached to the inner wall, ensuring the high-efficiency heat exchange performance of the finned tube 21.

[0033] A guide plate 105 is fixedly installed inside the steam-water separator 103 by welding. A demister 104 is fixedly installed inside the steam-water separator 103 by a bracket and located below the guide plate 105. After the heated solution mixture carrying water vapor enters the steam-water separator 103, the flow direction is changed by the guide plate 105. Under the action of the demister 104, gas-liquid separation and purification are achieved to ensure the purity of the separated concentrated solution.

[0034] In a preferred embodiment, one end of the moving rod 254 that extends into the finned tube 21 is fixedly connected to the scraper 255. The scraper 255 is preferably made of stainless steel, and a cleaning pad 256 is fixedly connected to its outer wall. The cleaning pad 256 is preferably made of polytetrafluoroethylene (PTFE). PTFE has the characteristics of high temperature resistance and low friction, which ensures that when the cleaning pad 256 slides in close contact with the inner wall of the finned tube 21, friction can be reduced and the tube wall can be avoided from being scratched. The stainless steel scraper 255 enhances the scraping force.

[0035] In a preferred embodiment, the solution pipe 3 before regeneration, the solution return pipe mechanism 4, the inlet solution main pipe 2 6, and the outlet solution main pipe 1 5 constitute a solution circulation and transportation network. One end of the outlet solution main pipe 1 5 is used to connect to the solution outlet end of the heat source tower, and the other end is connected to the inlet end of the solution pipe 3 before regeneration.

[0036] In a preferred embodiment, a regeneration water pump 101 and a regeneration electric regulating valve 102 are sequentially installed on the solution pipe 3 before regeneration. Both are fixed to the pipeline by means of flange connection. The regeneration water pump 101 is used to transport dilute solution, and the regeneration electric regulating valve 102 is used to coordinate and regulate the transport rate of solution to ensure the stability of subsequent heat exchange and regeneration processes.

[0037] As a preferred embodiment, the system is also equipped with a dilute solution tank 7, a concentrated solution tank 9, and a concentration control device 8. The dilute solution tank 7 stores the dilute solution to be concentrated, and the concentrated solution tank 9 stores the concentrated solution. The concentration control device 8 is connected to the dilute solution tank 7 and the concentrated solution tank 9 through dedicated mixing pipelines, and can extract the solution from the two tanks for concentration adjustment as needed, so as to achieve precise control and recycling of solution concentration.

[0038] In a preferred embodiment, a guide plate 105 is fixedly installed inside the steam-water separator 103 in the regeneration mechanism 10 by welding. The demister 104 is fixedly installed inside the steam-water separator 103 by a bracket and is located below the guide plate 105. The function of the demister 104 is to further remove the tiny droplets entrained in the water vapor evaporated from the solution, thereby improving the purity of the gas discharged from the steam pipe 41. The liquid outlet end of the steam-water separator 103 is sealed to one end of the solution supply pipe 42, and the other end of the solution supply pipe 42 is connected to the inlet solution main pipe 6, thus completing the regeneration, concentration and transportation of the solution.

[0039] As a preferred embodiment, the bottom of the flue gas condensation recovery mechanism 2 is welded to a condensate discharge port 22 for discharging the condensate generated by flue gas condensation during the heat exchange process. The system is also equipped with a liquid collection pipe 11, one end of which is connected to a concentrated solution tank 9 for concentrating and purifying the salt solution and storing it in the concentrated solution tank 9, so that the solution in the system can be recovered, concentrated and purified during maintenance.

[0040] The implementation principle of this application embodiment is as follows: When the system is running, the solution in the dilute solution tank 7 is transported through the solution pipe 3 before regeneration. The regeneration water pump 101 is started to extract the dilute solution, and its transport rate is regulated by the regeneration electric regulating valve 102. The solution enters the finned tube 21 inside the flue gas condensation recovery mechanism 2. At the same time, the atmospheric pressure hot water boiler 1 discharges high-temperature flue gas. The flue gas enters the outside of the flue gas condensation recovery mechanism 2 and exchanges heat with the finned tube 21. The heat in the flue gas is transferred to the dilute solution inside the finned tube 21, causing the solution temperature to rise and begin to evaporate. After the flue gas is cooled, the condensate formed by the water vapor is discharged through the condensate discharge port 22, realizing the recovery and utilization of boiler flue gas condensation heat.

[0041] The heated solution mixture carrying water vapor is transported to the vapor-water separator 103 inside the regeneration mechanism 10 via the solution return pipe mechanism 4. The solution mixture enters from the mixed liquid inlet end of the vapor-water separator 103 and changes its flow direction under the action of the internal guide plate 105, achieving preliminary gas-liquid separation. Under the further action of the demister 104, the tiny droplets entrained in the water vapor are removed, improving the gas purity. The separated water vapor is discharged from the gas outlet end of the vapor-water separator 103 through the water vapor pipe 41, while the concentrated solution with increased concentration flows out from the liquid outlet end of the vapor-water separator 103, enters the solution supply pipe 42, and is finally transported to the solution inlet end of the heat source tower via the inlet solution trunk pipe 6, completing the regeneration and concentration cycle of the solution.

[0042] When scale or crystals precipitate from the solution on the inner wall of the finned tube 21, the built-in cleaning component 25 is activated. The motor 251 starts and drives the turntable 252 to rotate. The turntable 252 drives the moving rod 254 to make reciprocating linear motion through the rotating arm 253. Since the moving rod 254 slides against the limiting block 257 on the inner wall of the finned tube 21, its movement trajectory is precisely limited to the axial direction of the finned tube 21. The moving rod 254 drives the stainless steel scraper 255 and the polytetrafluoroethylene cleaning pad 256 on it to reciprocate and scrape against the inner wall of the finned tube 21, effectively removing the scale on the tube wall and ensuring heat exchange efficiency. During the solution circulation process, the concentration control device 8 can extract the solution from the dilute solution tank 7 and the concentrated solution tank 9 as needed for mixing, so as to achieve precise control of the solution concentration.

[0043] When seasonal changes or system maintenance are required, the salt solution in the system can be recovered through the liquid collection pipe 11 and stored in the concentrated solution tank 9 for subsequent concentration, purification or reuse.

[0044] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model 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 utility model should be included within the protection scope of the present utility model.

Claims

1. A heat source tower solution concentration system incorporating boiler flue gas condensation heat, comprising: Atmospheric pressure hot water boiler (1), flue gas condensation and recovery mechanism (2), solution pipe before regeneration (3), solution return pipe mechanism (4) and regeneration mechanism (10); The flue outlet of the atmospheric pressure hot water boiler (1) is connected to the flue gas inlet of the flue gas condensation recovery mechanism (2). The flue gas condensation recovery mechanism (2) is equipped with a finned tube (21). The liquid inlet of the finned tube (21) is sealed and connected to the solution pipe (3) before regeneration. The liquid outlet of the finned tube (21) is sealed and connected to the solution return pipe mechanism (4). The liquid outlet of the solution return pipe mechanism (4) is connected to the solution inlet of the regeneration mechanism (10). The feature is that the flue gas condensation recovery mechanism (2) is provided with a cleaning component (25), which includes a motor (251), a turntable (252), a rotating arm (253), a moving rod (254), and a scraper (255).

2. The heat source tower solution concentration system combining boiler flue gas condensation heat according to claim 1, characterized in that, The motor (251) is fixedly installed inside the flue gas condensation and recovery mechanism (2) and drives the turntable (252) to rotate. The turntable (252) drives the moving rod (254) to reciprocate linearly along the axial direction inside the finned tube (21) through the rotating arm (253) which is rotatably connected. The inner wall of the finned tube (21) is fixedly connected to a limiting block (257). The moving rod (254) passes through the limiting block (257) and is slidably connected to the inner wall of the limiting block (257). The scraper (255) is fixedly connected to the moving rod (254) and abuts against the inner wall of the finned tube (21).

3. The heat source tower solution concentration system combining boiler flue gas condensation heat according to claim 2, characterized in that, A cleaning pad (256) is fixedly connected to the outer wall of the scraper (255). The cleaning pad (256) is made of polytetrafluoroethylene, and the scraper (255) is made of stainless steel. The cleaning pad (256) is tightly attached to the inner wall of the finned tube (21).

4. A heat source tower solution concentration system combining boiler flue gas condensation heat according to claim 2, characterized in that, The flue gas condensation and recovery mechanism (2) includes a first protective shell (23) and a second protective shell (24) with an inner and outer nested structure. The first protective shell (23) and the second protective shell (24) are fixedly connected by reinforcing ribs. The second protective shell (24) and the cleaning component (25) are both located inside the finned tube (21). The motor (251) is fixedly installed on the inner wall of the second protective shell (24).

5. A heat source tower solution concentration system combining boiler flue gas condensation heat according to claim 2, characterized in that, The regeneration mechanism (10) includes a regeneration water pump (101), a regeneration electric regulating valve (102), and a steam-water separator (103). The regeneration water pump (101) and the regeneration electric regulating valve (102) are sequentially fixedly installed on the pipeline of the solution pipe (3) before regeneration through flanges. The outlet end of the solution return pipe mechanism (4) is sealed to the mixed liquid inlet end of the steam-water separator (103).

6. A heat source tower solution concentration system combining boiler flue gas condensation heat according to claim 5, characterized in that, The regeneration mechanism (10) also includes a guide plate (105) and a demister (104). The guide plate (105) is fixedly installed inside the steam-water separator (103) by welding. The demister (104) is fixedly installed inside the steam-water separator (103) by a bracket and is located below the guide plate (105). A steam pipe (41) is welded to the gas outlet end of the steam-water separator (103).

7. A heat source tower solution concentration system combining boiler flue gas condensation heat according to claim 6, characterized in that, The liquid outlet end of the steam-water separator (103) is sealed to one end of the solution supply pipe (42), and the other end of the solution supply pipe (42) is connected to the second inlet solution pipe (6). The second inlet solution pipe (6) is used to connect with the solution inlet end of the heat source tower, and the steam pipe (41) is used to discharge the separated steam.

8. A heat source tower solution concentration system combining boiler flue gas condensation heat according to claim 2, characterized in that, It also includes a dilute solution tank (7), a concentrated solution tank (9), a concentration control device (8), and a first outlet solution main pipe (5). One end of the first outlet solution main pipe (5) is connected to the solution outlet end of the heat source tower, and the other end of the first outlet solution main pipe (5) is connected to the inlet end of the solution pipe (3) before regeneration. The concentration control device (8) is connected to the dilute solution tank (7) and the concentrated solution tank (9) respectively through a dedicated mixing pipeline.

9. A heat source tower solution concentration system combining boiler flue gas condensation heat according to claim 8, characterized in that, The bottom of the flue gas condensation recovery mechanism (2) is welded with a condensate discharge port (22). The system also includes a liquid collection pipe (11), one end of which is connected to the concentrated solution tank (9) for concentrating and purifying the salt solution and storing it in the concentrated solution tank (9).

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