Flue gas treatment device for gas-fired boiler

Abstract

The invention belongs to the technical field of flue gas treatment devices, and relates to a flue gas treatment device for a gas-fired boiler. The device comprises a box, a smoke inlet pipe is arranged on one side of the box, a smoke outlet pipe is arranged on the other side of the box, a heat exchange assembly is arranged in the box, one end of the heat exchange assembly is connected with a water return pipe, and the other end of the heat exchange assembly is connected with a water inlet pipe; the heat exchange assembly comprises a plurality of heat exchange shells arranged at intervals, and every two adjacent heat exchange shells communicate with each other through a first connecting pipe. A cleaning roller for cleaning the heat exchange shell is arranged in the box body, a sliding frame is arranged in the box body in a front-back sliding mode, a sliding rod is arranged in the sliding frame in a left-right elastic moving mode, and one end of the cleaning roller is connected with the sliding rod; and a concave-convex plate is fixedly mounted in the box body. The cleaning roller moves back and forth along the outer surface of the heat exchange shell and moves left and right in a reciprocating mode at the same time to clean the heat exchange shell. And meanwhile, the cleaning roller rotates, different parts of the cleaning roller can make contact with the heat exchange shell, and the cleaning effect on the heat exchange shell is guaranteed.

Description

Technical Field

[0001] The invention belongs to the technical field of flue gas treatment devices and relates to a flue gas treatment device for a gas boiler. Background Art

[0002] A gas boiler is a device that uses natural gas, liquefied petroleum gas or other gaseous fuels to burn to generate heat. In order to save resources and improve the utilization efficiency of gas boilers, people often recover the heat from the high-temperature flue gas generated by gas boilers and use the high-temperature flue gas to heat water.

[0003] For example, a patent document with the authorization announcement number CN210198148U discloses a device for deep recovery and utilization of waste heat from flue gas of a gas steam boiler, including a shell, a smoke inlet and a smoke outlet are arranged on the shell, a diverter plate is arranged inside the shell, the diverter plate is connected to a water pipe, a circulation mechanism is arranged on the shell, a connecting cavity is opened inside the diverter plate, the water pipe is passed into the connecting cavity, an annular cavity is also opened inside the diverter plate, and the diverter plate and the annular cavity are interconnected. In the device, water in the water pipe is drawn out and continuously circulated through the circulation mechanism, so that it passes through the heat collecting tube for multiple cycles to absorb heat, increasing the heat absorption stroke of the water flow and improving the heat absorption efficiency. The annular array distribution of the heat collecting tube allows the cold water to absorb heat more evenly, and the heat absorption speed is increased with the help of the heat collecting wire. However, the device has shortcomings in actual use: since there are a large number of dust particles in the flue gas, these dust particles will enter the shell with the flue gas and adhere to the heat collecting tube and the heat collecting wire, affecting the heat absorption efficiency of the heat collecting tube.

[0004] In order to solve the above problems, the present invention proposes a gas boiler flue gas treatment device. Summary of the invention

[0005] In order to solve the problems existing in the background technology, the present invention proposes a gas boiler flue gas treatment device.

[0006] In order to achieve the above object, the technical solution adopted by the present invention is as follows:

[0007] A gas boiler flue gas treatment device comprises a box body, a smoke inlet pipe is arranged on one side of the box body, a smoke outlet pipe is arranged on the other side of the box body, a heat exchange component is arranged in the box body, one end of the heat exchange component is connected to a return pipe, and the other end is connected to a water inlet pipe; the heat exchange component comprises a plurality of heat exchange shells arranged at intervals, and adjacent heat exchange shells are connected by a first connecting pipe; a cleaning roller for cleaning the heat exchange shells is arranged in the box body, a sliding frame is arranged in the box body for sliding back and forth, a sliding rod is arranged in the sliding frame for elastic movement left and right, one end of the cleaning roller is connected to the sliding rod, and the other end of the cleaning roller is slidably connected to the sliding frame; a concave-convex plate is fixedly installed in the box body, and the sliding rod cooperates with the concave-convex plate; the sliding frame drives the cleaning roller to move in the front-back direction and the cleaning roller reciprocates left and right at the same time.

[0008] Furthermore, the cleaning roller is rotatably mounted on the sliding frame; a rotating member is rotatably mounted on the sliding frame, the cleaning roller is limitedly slidably connected to the rotating member, a gear is fixedly mounted on the rotating member, a rack is fixed in the box, and the rack is meshed with the gear.

[0009] Furthermore, the smoke outlet pipe is connected to a spray tank, a smoke exhaust box is arranged on the spray tank, the smoke exhaust box is connected to the spray tank, and a smoke exhaust component is arranged in the smoke exhaust box.

[0010] Furthermore, a spray plate is provided on the upper part of the spray tank, and a plurality of spray holes are opened on the spray plate. The spray plate and the upper inner wall of the spray tank enclose a second water storage chamber. The water in the second water storage chamber is sprayed into the spray tank through the spray plate to remove dust and cool the flue gas in the spray tank.

[0011] Furthermore, a partition is fixed at the lower part of the spray tank, the partition and the lower inner wall of the spray tank enclose a first water storage cavity, and a drainage port is opened on the partition.

[0012] Furthermore, a water pump is fixed at the bottom of the spray tank, the first water storage chamber is connected to the water inlet of the water pump, the water outlet of the water pump is connected to the second connecting pipe, and the second connecting pipe is connected to the second water storage chamber.

[0013] Furthermore, the smoke exhaust assembly includes a first motor and fan blades, the first motor is fixedly mounted on the smoke exhaust box, and the output shaft of the first motor extends into the smoke exhaust box and is fixedly connected to the fan blades.

[0014] Furthermore, a screw rod is rotatably arranged in the box body, the sliding frame is threadedly connected to the screw rod, a guide rod is fixedly installed in the box body, and the sliding frame is slidably connected to the guide rod.

[0015] Furthermore, the rotating member includes a cylindrical section and a square section, which are fixedly connected; the cylindrical section is rotatably connected to the sliding frame, the sliding shaft is provided with a square hole adapted to the square section, and the square section is slidably arranged in the square hole.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. The cleaning roller moves forward and backward along the outer surface of the heat exchange shell while moving left and right to clean the heat exchange shell. At the same time, the cleaning roller rotates, so that different parts of the cleaning roller can contact the heat exchange shell, ensuring the cleaning effect of the heat exchange shell.

[0017] 2. When the flue gas is discharged through the spray tank, the water sprayed through the spray hole removes dust and cools the flue gas in the spray tank, reducing the impact of the flue gas on the environment. The first water storage chamber and the second water storage chamber are connected, so the water in the second water storage chamber can be reused to save water resources.

[0018] 3. The cone-shaped spray plate increases the time for the flue gas to pass through the spray plate, which is beneficial for sufficient dust removal and cooling of the flue gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 is a vertical cross-sectional view of the box body of the present invention;

[0021] Figure 3 It is a schematic diagram of the internal structure of the box body in the present invention;

[0022] Figure 4 It is a horizontal cross-sectional view of the present invention;

[0023] Figure 5 The present invention Figure 4 A magnified view of part A;

[0024] Figure 6 The present invention Figure 4 A magnified view of part B;

[0025] Figure 7 It is a structural schematic diagram of the heat exchange component in the present invention;

[0026] Figure 8 It is a structural schematic diagram of the sliding frame in the present invention;

[0027] Fig. 9 is a partial cross-sectional view of the sliding frame of the present invention;

[0028] Fig.10 It is a schematic diagram of the internal structure of the spray tank in the present invention;

[0029] Fig.11 It is a structural schematic diagram of the smoke exhaust assembly in the present invention;

[0030] Fig.12 It is a structural schematic diagram of the partition in the present invention.

[0031] In the figure: 1. box body; 2. smoke inlet pipe; 3. water return pipe; 4. water inlet pipe; 5. smoke outlet pipe; 6. spray tank; 7. second connecting pipe; 8. first motor; 9. smoke exhaust box; 10. water pump; 11. cleaning roller; 12. heat exchange shell; 13. fixed frame; 14. rack; 15. guide rod; 16. fixed card plate; 17. sliding frame; 18. first connecting pipe; 19. screw rod; 20. concave-convex plate; 21. sliding rod; 22. connecting shaft; 23. gear; 24. sliding shaft; 25. rotating part; 26. spring; 27. slide groove; 28. partition; 29. ​​spray plate; 30. fan blade; 31. spray hole; 32. filter; 33. first water storage chamber; 34. second motor; 35. second water storage chamber. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] like Figure 1-Figure 12 A gas boiler flue gas treatment device is shown.

[0034] Example 1: Figure 1-Figure 9 As shown, the technical solution adopted by the present invention is as follows: a gas boiler flue gas treatment device, comprising a box body 1 and a heat exchange component arranged in the box body 1. A smoke inlet pipe 2 is installed on one side of the box body 1, and a smoke outlet pipe 5 is installed on the other side. The smoke enters the box body 1 through the smoke inlet pipe 2, and then flows out through the smoke outlet pipe 5.

[0035] The heat exchange assembly includes a plurality of heat exchange shells 12, which are arranged at intervals from top to bottom. Adjacent heat exchange shells 12 are connected by a plurality of first connecting pipes 18. A fixed cardboard 16 adapted to the first connecting pipe 18 is fixedly installed in the box body 1, and the first connecting pipe 18 is clamped with the fixed cardboard 16. The heat exchange assembly is installed in the box body 1 by clamping the first connecting pipe 18 into the fixed cardboard 16. The uppermost heat exchange shell 12 is connected with the return pipe 3, and the lowermost heat exchange shell 12 is connected with the inlet pipe 4. The return pipe 3 and the inlet pipe 4 both extend to the outside of the box body 1 and are connected to corresponding equipment. Water enters the lowermost heat exchange shell 12 from the inlet pipe 4, then flows through the plurality of heat exchange shells 12 in sequence and is discharged from the return pipe 3, and the flue gas entering the box body 1 heats the water flowing through the heat exchange shell 12. In this embodiment, there are four heat exchange shells 12, and the four heat exchange shells 12 are spaced from top to bottom.

[0036] A cleaning roller 11 for cleaning the heat exchange shell 12 is provided in the box body 1. Cleaning rollers 11 are provided between adjacent heat exchange shells 12, on the upper end surface of the uppermost heat exchange shell 12, and on the lower end surface of the lowermost heat exchange shell 12. A sliding frame 17 is provided in the box body 1 for movement back and forth, and the cleaning roller 11 is installed on the sliding frame 17. Specifically, three guide rods 15 are fixedly installed in the box body 1, and the sliding frame 17 is slidably sleeved on the guide rods 15. A screw rod 19 is rotatably installed in the box body 1, and a second motor 34 is fixedly installed in the box body 1, and the output shaft of the second motor 34 is coaxially fixedly connected with the screw rod 19. The sliding frame 17 is threadedly connected to the screw rod 19. The three guide rods 15 and the screw rod 19 are respectively distributed at the four corners of the sliding frame 17.

[0037] A sliding rod 21 is slidably connected to the sliding frame 17. Slide grooves 27 are provided on the upper and lower sides of the sliding frame 17. The two slide grooves 27 are symmetrically arranged. The upper end of the sliding rod 21 is slidably arranged in the upper slide groove 27, and the lower end of the sliding rod 21 is slidably arranged in the lower slide groove 27. A spring 26 is arranged in the slide groove 27, one end of the spring 26 is connected to the slide groove 27, and the other end of the spring 26 is fixedly connected to the end wall of the slide groove 27.

[0038] A concave-convex plate 20 is fixedly installed in the box body 1, and the concave-convex plate 20 is arranged in the front-back direction, and the concave-convex plate 20 cooperates with the sliding rod 21. The side of the sliding rod 21 that cooperates with the concave-convex plate 20 is in an arc shape. When the sliding frame 17 slides forward and backward, the sliding rod 21 moves forward and backward, and under the action of the concave-convex plate 20, the sliding rod 21 moves back and forth along the slide groove 27 at the same time.

[0039] One end of the cleaning roller 11 is fixedly connected with a connecting shaft 22, and the connecting shaft 22 is rotatably connected with the sliding rod 21. The other end of the cleaning roller 11 is fixedly connected with a sliding shaft 24, and the sliding frame 17 is fixed with the fixed frame 13, and the sliding shaft 24 is arranged in the fixed frame 13. A rotating member 25 is rotatably installed on the side of the sliding frame 17 close to the fixed frame 13, and the rotating member 25 includes a cylindrical section and a square section, and the cylindrical section and the square section are fixedly connected. The cylindrical section is rotatably connected with the sliding frame 17, and the sliding shaft 24 is provided with a square hole adapted to the square section of the rotating member 25, and the square section of the rotating member 25 is slidably arranged in the square hole. When the sliding rod 21 reciprocates left and right, the cleaning roller 11 reciprocates left and right, and the sliding shaft 24 slides along the square section of the rotating member 25.

[0040] The cylindrical section of the rotating member 25 is coaxially fixedly connected with the gear 23, and the rack 14 is fixedly connected in the box body 1, and the rack 14 meshes with the gear 23. When the sliding frame 17 moves forward and backward, under the action of the rack 14, the gear 23 rotates, the rotating member 25 rotates, and the cleaning roller 11 rotates.

[0041] Working principle: The smoke is transported into the box 1 through the smoke inlet pipe 2, and the smoke entering the box 1 flows out through the smoke outlet pipe 5. Cold water is input into the heat exchange component through the water inlet pipe 4, and the water entering the heat exchange component passes through multiple heat exchange shells 12 from bottom to top and then flows out through the return pipe 3. The smoke entering the box 1 heats the water in the heat exchange component.

[0042] Since the flue gas contains a large amount of dust particles, after being used for a period of time, a large amount of dust particles will accumulate on the outer surface of the heat exchange shell 12. If it is not cleaned in time, the heat absorption efficiency of the heat exchange shell 12 will be affected.

[0043] When the heat exchange shell 12 needs to be cleaned, the second motor 34 is started to move the sliding frame 17 forward in the box body 1. When the sliding frame 17 moves forward, the sliding rod 21 and the cleaning roller 11 move forward synchronously. Under the action of the concave-convex plate 20, the sliding rod 21 moves back and forth, thereby causing the cleaning roller 11 to move back and forth, and the sliding shaft 24 slides along the square segment. The cleaning roller 11 cleans the outer surface of the heat exchange shell 12 from back to front.

[0044] At the same time, under the action of the rack 14, the gear 23 rotates, the rotating member 25 rotates, and the cleaning roller 11 rotates. Different parts of the cleaning roller 11 are in contact with the heat exchange shell 12, which is conducive to cleaning the heat exchange shell 12 more cleanly.

[0045] When the sliding frame 17 moves the front end of the screw rod 19 , the second motor 34 is rotated in the reverse direction to move the sliding frame 17 toward the rear end, and the cleaning roller 11 cleans the outer surface of the heat exchange shell 12 from front to back.

[0046] Embodiment 2: This embodiment is an improvement based on embodiment 1.

[0047] like Figure 1 , Fig.10 , Fig.11 as well as Fig.12 As shown, the smoke outlet pipe 5 is connected to the spray tank 6, and a smoke exhaust box 9 is fixedly installed on the upper part of the spray tank 6. The smoke exhaust box 9 is connected to the spray tank 6. The smoke exhausted from the box body 1 enters the spray tank 6 through the smoke outlet pipe 5 and is discharged through the smoke exhaust box 9.

[0048] A smoke exhaust assembly is installed in the smoke exhaust box 9. The smoke exhaust assembly includes a first motor 8 and a fan blade 30. The first motor 8 is fixedly installed on the smoke exhaust box 9, and the output shaft of the first motor 8 extends into the smoke exhaust box 9 and is fixedly connected to the fan blade 30. When the first motor 8 is started, the fan blade 30 rotates, and the smoke in the box body 1 is sucked into the spray tank 6 and discharged through the smoke exhaust box 9.

[0049] A spray plate 29 is fixedly installed on the upper part of the spray tank 6. The spray plate 29 is in a cone shape with the tip facing upward. The upper end of the spray plate 29 is connected to the smoke exhaust box 9. A plurality of spray holes 31 are provided on the spray plate 29. The spray plate 29 and the inner wall of the upper part of the box body 1 enclose a second water storage chamber 35. The water in the second water storage chamber 35 is sprayed out through the spray holes 31 to remove dust and cool the smoke in the spray tank 6.

[0050] A partition 28 is fixedly installed in the box body 1, and the partition 28 and the inner wall of the lower part of the box body 1 enclose the first water storage chamber 33. A water pump 10 is fixedly installed at the bottom of the box body 1, and the water inlet end of the water pump 10 is connected to the first water storage chamber 33, and the water outlet end of the water pump 10 is connected to the second connecting pipe 7, and the second connecting pipe 7 is connected to the second water storage chamber 35. A drain port is opened on the partition 28, and a filter 32 is installed in the drain port. The water entering the spray tank 6 enters the first water storage chamber 33 through the drain port, and then enters the second water storage chamber 35 under the action of the water pump 10, and then the water in the second water storage chamber 35 can be recycled, which is conducive to saving water resources.

[0051] Working principle: Start the first motor 8, the fan blade 30 rotates, so that the smoke in the box 1 is sucked into the spray tank 6, and the smoke in the spray tank 6 flows upward and flows into the smoke exhaust box 9 after passing through the spray plate 29 and is discharged. Start the water pump 10, the water pump 10 transports the water in the first water storage chamber 33 to the second water storage chamber 35, and the water in the second water storage chamber 35 is sprayed out through the spray hole 31 to remove dust and cool the smoke in the spray tank 6. After that, the water in the spray tank 6 flows into the first water storage chamber 33 after being filtered by the filter 32, so as to realize the recycling of the water in the second water storage chamber 35. The spray plate 29 is set in a cone shape, which is conducive to increasing the time for the smoke to pass through the spray plate 29, and then it is conducive to fully removing dust and cooling the smoke in the spray tank 6.

[0052] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A gas boiler flue gas treatment device, comprising a box body (1), a smoke inlet pipe (2) is arranged on one side of the box body (1), and a smoke outlet pipe (5) is arranged on the other side of the box body (1), characterized in that: A heat exchange assembly is arranged in the housing (1), one end of the heat exchange assembly is connected to a return pipe (3), and the other end is connected to a water inlet pipe (4); the heat exchange assembly comprises a plurality of heat exchange shells (12) arranged at intervals, and adjacent heat exchange shells (12) are connected via a first connecting pipe (18); a cleaning roller (11) for cleaning the heat exchange shells (12) is arranged in the housing (1), a sliding frame (17) is arranged in the housing (1) to slide forward and backward, a sliding rod (21) is arranged in the sliding frame (17) to elastically move left and right, one end of the cleaning roller (11) is connected to the sliding rod (21), and the other end of the cleaning roller (11) is slidably connected to the sliding frame (17); a concave-convex plate (20) is fixedly installed in the housing (1), and the sliding rod (21) cooperates with the concave-convex plate (20); the sliding frame (17) drives the cleaning roller (11) to move in the front-back direction while the cleaning roller (11) reciprocates left and right.

2. A gas boiler flue gas treatment device according to claim 1, characterized in that: The cleaning roller (11) is rotatably mounted on the sliding frame (17); a rotating member (25) is rotatably mounted on the sliding frame (17); the cleaning roller (11) and the rotating member (25) are connected in a limited sliding manner; a gear (23) is fixedly mounted on the rotating member (25); a rack (14) is fixed in the box body (1), and the rack (14) is meshed with the gear (23).

3. A gas boiler flue gas treatment device according to claim 1 or 2, characterized in that: The smoke outlet pipe (5) is connected to a spray tank (6), a smoke exhaust box (9) is arranged on the spray tank (6), the smoke exhaust box (9) is connected to the spray tank (6), and a smoke exhaust component is arranged in the smoke exhaust box (9).

4. A gas boiler flue gas treatment device according to claim 3, characterized in that: A spray plate (29) is arranged on the upper part of the spray tank (6), and a plurality of spray holes (31) are opened on the spray plate (29). The spray plate (29) and the upper inner wall of the spray tank (6) enclose a second water storage chamber (35). Water in the second water storage chamber (35) is sprayed into the spray tank (6) through the spray plate (29), so as to remove dust and cool the flue gas in the spray tank (6).

5. A gas boiler flue gas treatment device according to claim 4, characterized in that: A partition (28) is fixed at the lower part of the spray tank (6), the partition (28) and the lower inner wall of the spray tank (6) enclose a first water storage chamber (33), and a drainage port is provided on the partition (28).

6. A gas boiler flue gas treatment device according to claim 5, characterized in that: A water pump (10) is fixed at the bottom of the spray tank (6); the first water storage chamber (33) is connected to the water inlet of the water pump (10); the water outlet of the water pump (10) is connected to the second connecting pipe (7); and the second connecting pipe (7) is connected to the second water storage chamber (35).

7. A gas boiler flue gas treatment device according to claim 3, characterized in that: The smoke exhaust assembly comprises a first motor (8) and a fan blade (30), wherein the first motor (8) is fixedly mounted on the smoke exhaust box (9), and an output shaft of the first motor (8) extends into the smoke exhaust box (9) and is fixedly connected to the fan blade (30).

8. A gas boiler flue gas treatment device according to claim 1, characterized in that: A screw rod (19) is rotatably arranged in the box body (1), the sliding frame (17) is threadedly connected to the screw rod (19), a guide rod (15) is fixedly installed in the box body (1), and the sliding frame (17) is slidably connected to the guide rod (15).

9. A gas boiler flue gas treatment device according to claim 2, characterized in that: The rotating member (25) comprises a cylindrical section and a square section, which are fixedly connected; the cylindrical section is rotatably connected to the sliding frame (17), the sliding shaft (24) is provided with a square hole adapted to the square section, and the square section is slidably arranged in the square hole.

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