Condensing boiler with tail gas treatment structure

Abstract

The condensing boiler with the tail gas treatment structure comprises a shell, a water inlet is fixedly installed at the side end of the shell, a water outlet is fixedly installed at the end, away from the water inlet, of the shell, a water inlet tank is fixedly installed on the inner wall of the shell, and a heating tank is fixedly installed at the end, close to the water outlet, of the water inlet tank. A first heat exchanger is fixedly installed on the inner wall of the water inlet tank, a second heat exchanger is fixedly installed on the inner wall of the heating tank and fixedly connected to the first heat exchanger, and a heater is fixedly installed at the end, close to the second heat exchanger, of the heating tank. Smoke in the connecting pipe is pumped out through the sucking pump and discharged into the smoke exhaust pipe, the electrostatic generator can generate static electricity and output the static electricity into the smoke exhaust pipe, fine particles in the smoke are attached with the static electricity, then the smoke is discharged into the smoke exhaust box, the particles attached with the static electricity can be adsorbed on the metal net, and unified treatment is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of condensing boilers, specifically a condensing boiler with a tail gas treatment structure. Background Technology

[0002] The European oil crisis of the 1970s spurred technological innovation in traditional boilers. Early gas / coal boilers had thermal efficiencies of less than 90% and flue gas temperatures exceeding 200°C, resulting in significant heat loss through the flue gas. Researchers proposed the concept of recovering latent heat from flue gas, achieving thermal efficiency exceeding 100% by reducing the flue gas temperature to below 50°C.

[0003] Although condensing boilers have lower emissions, the ammonia oxides produced during combustion can still generate ozone through photochemical reactions, forming photochemical smog, which reduces air quality and causes respiratory diseases (such as asthma and decreased lung function). NOx dissolves in rainwater to form nitric acid, leading to acid rain, which corrodes buildings, damages soil structure, and causes crop yield reduction.

[0004] A search revealed prior art publication number CN215112698U, which discloses an integrated condensing boiler exhaust gas purification device. The device includes a boiler with a boiler support frame at the bottom. A boiler exhaust pipe is located on the left side of the boiler, with a top exhaust outlet at the top. A smoke concentration sensor and a solenoid valve are installed at the top exhaust outlet. A smoke recovery pipe is located on the opposite right side of the boiler exhaust pipe, and a smoke purification box is located to the right of the smoke recovery pipe. A purified exhaust gas outlet is located to the right of the smoke purification box, and a vertically downward-arranged desulfurization liquid recovery pipe is located at the bottom right end of the smoke purification box. The sulfur recovery pipe has a desulfurization liquid recovery tank at the bottom, a desulfurization liquid recovery tank support frame at the bottom, a desulfurization liquid circulation pipe on the left side of the desulfurization liquid recovery tank, a desulfurization liquid storage tank on the left side of the desulfurization liquid circulation pipe, a vertically upward desulfurization liquid pumping pipe on the top of the desulfurization liquid storage tank, and a desulfurization liquid baffle on the top of the desulfurization liquid pumping pipe; the fume purification box is a square pipe, and a desulfurization liquid water path dividing plate that serves to divert the flow is installed inside the fume purification box; the desulfurization liquid is contained in the desulfurization liquid storage tank and the desulfurization liquid recovery tank.

[0005] The existing condensing boilers require manual tilting of the flue gas purification box, which is inconvenient to use and cannot handle the tiny particles generated in the boiler combustion flue gas. Therefore, based on the above research and in combination with the existing problems, a condensing boiler with a tail gas treatment structure is provided. Utility Model Content

[0006] The purpose of this invention is to provide a condensing boiler with a tail gas treatment structure to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a condensing boiler with a tail gas treatment structure, comprising a shell, an inlet fixedly installed on the side end of the shell, an outlet fixedly installed at the end of the shell away from the inlet, an inlet tank fixedly installed on the inner wall of the shell, a heating box fixedly installed at the end of the inlet tank near the outlet, a first heat exchanger fixedly installed on the inner wall of the inlet tank and fixedly connected to the inlet, a second heat exchanger fixedly installed on the inner wall of the heating box and fixedly connected to the first heat exchanger, with the upper end of the second heat exchanger fixedly connected to the outlet, and a heater fixedly installed at the end of the heating box near the second heat exchanger.

[0008] Furthermore, a motor is fixedly installed on the inner wall of the heating box, a fan is fixedly installed on the end of the motor away from the heating box, a flue gas channel is fixedly installed on the inner wall of the heating box away from the fan, a filter screen is fixedly installed on the end of the flue gas channel near the water inlet tank, and the filter screen is fixedly connected to the flue gas channel.

[0009] Furthermore, a water collection tank is fixedly installed on the inner wall of the water inlet tank at the end away from the first heat exchanger, and a drain hole is fixedly opened at the upper end of the water collection tank.

[0010] Furthermore, a connecting pipe is fixedly installed at the upper end of the first heat exchanger, an air pump is fixedly installed at the upper end of the connecting pipe, an exhaust pipe is fixedly installed at the side end of the air pump, an exhaust box is fixedly installed at the end of the exhaust pipe away from the air pump, an electrostatic generator is fixedly installed at the upper end of the exhaust box, and the output end of the electrostatic generator is connected to the exhaust pipe, a metal mesh is fixedly installed on the inner wall of the exhaust box, and an exhaust port is fixedly installed at the end of the exhaust box away from the exhaust pipe.

[0011] Furthermore, a lime water tank is fixedly installed at the upper end of the smoke exhaust box, a spring telescopic plate is fixedly installed on the inner wall of the lime water tank, a rack frame is fixedly installed at the lower end of the spring telescopic plate, a driven rod is rotatably installed at the lower end of the rack frame, and the driven rod passes through the inner wall of the smoke exhaust box. Second gears are fixedly installed at both ends of the driven rod, a first gear is rotatably installed at the lower end of the second gear, a driving rod is fixedly installed on the inner wall of the first gear, and a fan blade is rotatably installed at the side end of the driving rod.

[0012] Furthermore, a nozzle is fixedly installed at the lower end of the lime water tank, and the nozzle passes through the smoke exhaust box and the inner wall of the lime water tank.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. This utility model uses an air pump to extract the flue gas from the connecting pipe and discharge it into the exhaust pipe. An electrostatic generator generates static electricity and outputs it into the exhaust pipe, causing the fine particles in the flue gas to be charged with static electricity. The flue gas is then discharged into the exhaust box, where the charged particles will be attracted to the metal mesh for easy and uniform processing.

[0015] 2. This utility model uses an air pump to discharge flue gas into the exhaust box. The flue gas blows the drain hole, causing it to rotate clockwise. The fan blade drives the drive rod to rotate clockwise, causing the spring telescopic plate to shorten or extend. The lime water inside the lime water tank enters the nozzle and then enters the exhaust box, where it comes into contact with the flue gas. This neutralizes the sulfur dioxide in the flue gas, turning it into gypsum residue that falls onto the metal mesh. No manual operation is required, making it more convenient to use. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the external structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the internal structure of the present invention;

[0018] Figure 3 This is a schematic diagram of the exhaust gas treatment structure of this utility model;

[0019] Figure 4 This is a schematic diagram of the telescopic plate structure of this utility model.

[0020] In the diagram: 1. Shell; 2. Inlet; 3. Outlet; 4. Connecting pipe; 5. Smoke box; 6. Air pump; 7. Lime water tank; 8. Exhaust port; 9. Inlet tank; 10. Heating box; 11. Heater; 12. Second heat exchanger; 13. First heat exchanger; 14. Water collection tank; 15. Drain hole; 16. Motor; 17. Fan; 18. Flue gas passage; 19. Filter screen; 20. Smoke pipe; 21. Electrostatic generator; 22. Metal mesh; 23. Spring telescopic plate; 24. Nozzle; 25. Fan blade; 26. Driving rod; 27. First gear; 28. Driven rod; 29. ​​Second gear; 30. Rack frame. Detailed Implementation

[0021] 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.

[0022] Example: Please refer to Figures 1-4A condensing boiler with a tail gas treatment structure includes a shell 1. A water inlet 2 is fixedly installed on the side of the shell 1, and a water outlet 3 is fixedly installed at the end of the shell 1 away from the water inlet 2. A water inlet tank 9 is fixedly installed on the inner wall of the shell 1. A heating tank 10 is fixedly installed at the end of the water inlet tank 9 near the water outlet 3. A first heat exchanger 13 is fixedly installed on the inner wall of the water inlet tank 9 and is fixedly connected to the water inlet 2. A second heat exchanger is fixedly installed on the inner wall of the heating tank 10. The second heat exchanger 12 is fixedly connected to the first heat exchanger 13, and the upper end of the second heat exchanger 12 is fixedly connected to the outlet 3. A heater 11 is fixedly installed at one end of the heating box 10 near the second heat exchanger 12. When the boiler is working, cold water enters the first heat exchanger 13 from the inlet 2, and then enters the second heat exchanger 12 from the first heat exchanger 13. The heater 11 heats the water inside the second heat exchanger 12 and then enters the outlet 3, and finally discharges it from the outlet 3.

[0023] Please see Figure 1 , Figure 2 A motor 16 is fixedly installed on the inner wall of the heating box 10. A fan 17 is fixedly installed on the end of the motor 16 away from the heating box 10. A flue gas passage 18 is fixedly installed on the inner wall of the heating box 10 away from the fan 17. A filter screen 19 is fixedly installed on the end of the flue gas passage 18 near the water inlet tank 9 and is fixedly connected to the flue gas passage 18. When the heater 11 heats the water in the second heat exchanger 12, flue gas will be generated inside the heating box 10. The motor 16 controls the fan 17 to rotate and blow the flue gas into the flue gas passage 18. The flue gas passage 18 then discharges the flue gas to the filter screen 19. The filter screen 19 filters out the large particles generated in the flue gas after combustion and then discharges the flue gas into the water inlet tank 9.

[0024] Please see Figure 1 , Figure 2 A water collection tank 14 is fixedly installed on the inner wall of the end of the water inlet tank 9 away from the first heat exchanger 13. A drain hole 15 is fixedly opened at the upper end of the water collection tank 14. When the flue gas is discharged into the interior of the water inlet tank 9, the heat in the flue gas will preheat the water in the first heat exchanger 13. The condensate formed when the hot steam meets the cold water will enter the water collection tank 14 through the drain hole 15 for unified treatment.

[0025] Please see Figures 1-3A connecting pipe 4 is fixedly installed at the upper end of the first heat exchanger 13. A vacuum pump 6 is fixedly installed at the upper end of the connecting pipe 4. A flue pipe 20 is fixedly installed at the side end of the vacuum pump 6. A flue box 5 is fixedly installed at the end of the flue pipe 20 away from the vacuum pump 6. An electrostatic generator 21 is fixedly installed at the upper end of the flue box 5, and the output end of the electrostatic generator 21 is connected to the flue pipe 20. A metal mesh 22 is fixedly installed on the inner wall of the flue box 5. An exhaust port 8 is fixedly installed at the end of the flue box 5 away from the flue pipe 20. When After the flue gas preheats the water in the first heat exchanger 13, the remaining flue gas will be discharged into the connecting pipe 4. The suction pump 6 will extract the flue gas from the connecting pipe 4 and discharge it into the exhaust pipe 20. The electrostatic generator 21 is existing technology and will not be described in detail here. When the flue gas is discharged into the exhaust pipe 20, the electrostatic generator 21 will generate static electricity and output it into the exhaust pipe 20, causing the fine particles in the flue gas to be charged with static electricity. Then the flue gas is discharged into the exhaust box 5, where the charged particles will be adsorbed onto the metal mesh 22 for uniform treatment.

[0026] Please see Figures 1-3 A lime water tank 7 is fixedly installed at the upper end of the smoke exhaust box 5. A spring telescopic plate 23 is fixedly installed on the inner wall of the lime water tank 7. A rack frame 30 is fixedly installed at the lower end of the spring telescopic plate 23. A driven rod 28 is rotatably installed at the lower end of the rack frame 30, and the driven rod 28 passes through the inner wall of the smoke exhaust box 5. A second gear 29 is fixedly installed at both ends of the driven rod 28. A first gear 27 is rotatably installed at the lower end of the second gear 29. A driving rod 26 is fixedly installed on the inner wall of the first gear 27. A fan blade 25 is rotatably installed at the side end of the driving rod 26. When the suction pump 6 exhausts the flue gas into the smoke exhaust box 5, the flue gas will blow the drain hole 15, causing it to rotate clockwise. The fan blade 25... The driving rod 26 rotates clockwise, which drives the first gear 27 to rotate clockwise. The first gear 27 drives the driven rod 28 and the second gears 29 at both ends to rotate clockwise, and moves them to the right along the rack inside the rack frame 30, causing the spring telescopic plate 23 to shorten. When the air pump 6 stops working, the spring telescopic plate 23 extends, driving the driven rod 28 and the second gear 29 to rotate counterclockwise, and moves them to the left along the rack inside the rack frame 30. The second gear 29 drives the first gear 27 to rotate counterclockwise, the first gear 27 drives the driving rod 26 to rotate counterclockwise, and the driving rod 26 drives the fan blade 25 to rotate counterclockwise, causing the spring telescopic plate 23 to return to its initial state.

[0027] Please see Figure 3 , Figure 4A nozzle 24 is fixedly installed at the lower end of the lime water tank 7, and the nozzle 24 passes through the inner wall of the smoke exhaust box 5 and the lime water tank 7. When the spring telescopic plate 23 is shortened, the lime water inside the lime water tank 7 will enter the nozzle 24, and then enter the smoke exhaust box 5 from the nozzle 24. It will come into contact with the flue gas in the smoke exhaust box 5, neutralize the sulfur dioxide in the flue gas, and turn it into gypsum residue that falls onto the metal mesh 22, so that the flue gas meets the emission standards. The remaining gas is discharged through the exhaust port 8. When the spring telescopic plate 23 is extended, the lime water will stop entering the nozzle 24 in order to save resources.

[0028] Working principle: When the boiler is working, cold water enters the first heat exchanger 13 from the inlet 2, and then enters the second heat exchanger 12 from the first heat exchanger 13. The heater 11 heats the water inside the second heat exchanger 12, and flue gas is generated inside the heating box 10. The motor 16 controls the fan 17 to rotate, blowing the flue gas into the flue gas passage 18, and then the flue gas is discharged to the filter screen 19 from the flue gas passage 18. The filter screen 19 filters out large particles generated in the flue gas after combustion, and then the flue gas is discharged into the water inlet tank 9. The heat in the flue gas preheats the water in the first heat exchanger 13. The condensate formed when the hot gas meets the cold water enters the water collection tank 14 through the drain hole 15. The remaining flue gas is discharged into the connecting pipe 4. The suction pump 6 extracts the flue gas from the connecting pipe 4 and discharges it into the exhaust pipe 20. The electrostatic generator 21 generates static electricity and outputs it into the exhaust pipe 20, causing the fine particles in the flue gas to be charged with static electricity. The flue gas is then discharged into the exhaust box 5. The charged particles are adsorbed onto the metal mesh 22 for uniform treatment.

[0029] When the exhaust pump 6 discharges the flue gas into the exhaust box 5, the flue gas blows the drain hole 15, causing it to rotate clockwise. The fan blade 25 drives the drive rod 26 to rotate clockwise, which in turn drives the first gear 27 to rotate clockwise. The first gear 27 then drives the driven rod 28 and the second gears 29 at both ends to rotate clockwise, causing them to move to the right along the rack in the rack frame 30. This causes the spring telescopic plate 23 to shorten, and the lime water inside the lime water tank 7 enters the nozzle 24 and then enters the exhaust box 5. It comes into contact with the flue gas in the exhaust box 5, neutralizing the sulfur dioxide in the flue gas and turning it into gypsum residue that falls onto the metal mesh 22, thus ensuring that the flue gas meets emission standards. The remaining gas is then discharged through the exhaust port 8.

[0030] When the air pump 6 stops working, the spring telescopic plate 23 extends, causing the driven rod 28 and the second gear 29 to rotate counterclockwise and move to the left along the rack in the rack frame 30. The second gear 29 drives the first gear 27 to rotate counterclockwise, the first gear 27 drives the driving rod 26 to rotate counterclockwise, and the driving rod 26 drives the fan blade 25 to rotate counterclockwise, so that the spring telescopic plate 23 returns to its initial state. The lime water will stop entering the nozzle 24 in order to save resources.

[0031] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the scope of the technology disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A condensing boiler with a tail gas treatment structure, comprising a shell (1), characterized in that: A water inlet (2) is fixedly installed on the side end of the shell (1), and a water outlet (3) is fixedly installed on the end of the shell (1) away from the water inlet (2). A water inlet tank (9) is fixedly installed on the inner wall of the shell (1). A heating tank (10) is fixedly installed on the end of the water inlet tank (9) near the water outlet (3). A first heat exchanger (13) is fixedly installed on the inner wall of the water inlet tank (9) and is fixedly connected to the water inlet (2). A second heat exchanger (12) is fixedly installed on the inner wall of the heating tank (10). The second heat exchanger (12) is fixedly connected to the first heat exchanger (13), and the upper end of the second heat exchanger (12) is fixedly connected to the water outlet (3). A heater (11) is fixedly installed on the end of the heating tank (10) near the second heat exchanger (12).

2. A condensing boiler with a tail gas treatment structure according to claim 1, characterized in that: A motor (16) is fixedly installed on the inner wall of the heating box (10). A fan (17) is fixedly installed on the end of the motor (16) away from the heating box (10). A flue gas channel (18) is fixedly installed on the inner wall of the heating box (10) away from the fan (17). A filter screen (19) is fixedly installed on the end of the flue gas channel (18) near the water inlet tank (9), and the filter screen (19) is fixedly connected to the flue gas channel (18).

3. A condensing boiler with a tail gas treatment structure according to claim 2, characterized in that: A water collection tank (14) is fixedly installed on the inner wall of the water inlet tank (9) away from the first heat exchanger (13), and a drain hole (15) is fixedly opened at the upper end of the water collection tank (14).

4. A condensing boiler with a tail gas treatment structure according to claim 3, characterized in that: A connecting pipe (4) is fixedly installed at the upper end of the first heat exchanger (13). A vacuum pump (6) is fixedly installed at the upper end of the connecting pipe (4). A flue pipe (20) is fixedly installed at the side end of the vacuum pump (6). A flue box (5) is fixedly installed at the end of the flue pipe (20) away from the vacuum pump (6). An electrostatic generator (21) is fixedly installed at the upper end of the flue box (5), and the output end of the electrostatic generator (21) is connected to the flue pipe (20). A metal mesh (22) is fixedly installed on the inner wall of the flue box (5). An exhaust port (8) is fixedly installed at the end of the flue box (5) away from the flue pipe (20).

5. A condensing boiler with a tail gas treatment structure according to claim 4, characterized in that: A lime water tank (7) is fixedly installed at the upper end of the smoke exhaust box (5). A spring telescopic plate (23) is fixedly installed on the inner wall of the lime water tank (7). A rack frame (30) is fixedly installed at the lower end of the spring telescopic plate (23). A driven rod (28) is rotatably installed at the lower end of the rack frame (30). The driven rod (28) passes through the inner wall of the smoke exhaust box (5). A second gear (29) is fixedly installed at both ends of the driven rod (28). A first gear (27) is rotatably installed at the lower end of the second gear (29). A driving rod (26) is fixedly installed on the inner wall of the first gear (27). A fan blade (25) is rotatably installed at the side end of the driving rod (26).

6. A condensing boiler with a tail gas treatment structure according to claim 5, characterized in that: A nozzle (24) is fixedly installed at the lower end of the lime water tank (7), and the nozzle (24) passes through the smoke exhaust box (5) and the inner wall of the lime water tank (7).

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