Flue gas recirculation device of gas-fired boiler

Abstract

The utility model provides a gas-fired boiler flue gas recirculation device, which belongs to the technical field of flue gas circulation and comprises a bottom plate, universal wheels are fixed at four corners of the lower end face of the bottom plate, threaded rods are rotatably connected to two ends of the bottom plate, and a driving structure used for driving the threaded rods to rotate simultaneously is arranged on the front side of the bottom plate. A lifting plate is arranged on the upper side of the bottom plate, guide rods are fixedly connected to the two ends of the lower end face of the lifting plate, sliding blocks are slidably connected to the guide rods, and two first connecting bases are symmetrically and fixedly connected to the lower end face of the lifting plate. Through the arrangement of the circulating pipe, the three-way pipe, the filter cartridge, the fixing ring, the filter screen and the cleaning structure, particulate matters in flue gas are filtered, the flue gas recycling effect is guaranteed, air pollution can be avoided during emission, the flue gas recycling effect is guaranteed, and the environmental protection effect is achieved. The problem that particulate matter in smoke is inconvenient to filter in the prior art is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of flue gas circulation, and in particular to a flue gas recirculation device for a gas boiler. Background Art

[0002] Gas boilers mainly use natural gas as fuel and are widely used in industrial production and residential heating. As my country's environmental protection requirements become increasingly stringent, the emission limits on nitrogen oxides from gas boilers are also becoming increasingly stringent. Using gas boilers to burn such industrial exhaust can both reduce environmental pollution and effectively utilize energy.

[0003] After searching, in the prior art, a Chinese patent with patent application number CN202322100480.6 discloses a flue gas recirculation device for a gas boiler, comprising a reaction barrel, a water storage chamber is provided inside the reaction barrel, a fixing ring is sleeved on the outer surface of the reaction barrel, and a circulation pump is fixedly connected to the outer surface of the fixing ring, a ventilation pipe is provided on the outer surface of one side of the circulation pump, a first motor is fixedly provided on the upper surface of the cover plate, and the output end of the first motor passes through the cover plate and is fixedly connected to a rotating rod, so as to achieve the purpose of cooling and recycling the flue gas in the gas boiler; a lifting assembly is provided at the lower part of the reaction barrel, the lifting assembly includes a base and a second motor, and four levers distributed in a rectangular array are rotatably connected to the outer surface of the base, threaded rods are fixedly provided on the upper surfaces of the levers, nut blocks are threadedly sleeved on the outer surfaces of the threaded rods, and a synchronous wheel is sleeved on the lower outer surface of the levers; but the following defects still exist:

[0004] (1) The flue gas recirculation device in the prior art is not convenient for filtering particulate matter in the flue gas during the recycling process, which affects the effect of recycling, and the emissions are also prone to pollute the air;

[0005] The flue gas recirculation device in the prior art has a poor effect in adjusting the height. The transmission through the synchronous belt and synchronous wheel is prone to slippage, which makes it inconvenient to effectively adjust the height and the aesthetics are poor.

[0006] Therefore, we have made improvements to this and proposed a flue gas recirculation device for a gas boiler. Utility Model Content

[0007] The utility model aims to solve the problem that the existing flue gas recirculation device is inconvenient to filter the particulate matter in the flue gas and is inconvenient to effectively adjust the height.

[0008] In order to achieve the above-mentioned utility model purpose, the utility model provides the following technical solutions:

[0009] Gas boiler flue gas recirculation device is used to improve the above problems.

[0010] The utility model is specifically as follows:

[0011] The invention comprises a bottom plate, four corners of the lower end surface of the bottom plate are fixed with universal wheels, both ends of the bottom plate are rotatably connected with threaded rods, the front side of the bottom plate is provided with a driving structure for simultaneously driving the threaded rods to rotate, the upper side of the bottom plate is provided with a lifting plate, both ends of the lower end surface of the lifting plate are fixedly connected with guide rods, the guide rods are slidably connected with sliders, the lower end surface of the lifting plate is symmetrical and fixedly connected with two first connecting seats, the slider and the first connecting seat on the same side are rotatably connected with a lifting frame, the bottom ends of the lifting frame are respectively rotatably connected with an adjusting block and a second connecting seat, the adjusting block is threadedly connected to the threaded rod The second connecting seat is fixedly connected to the bottom plate, the upper end surface of the lifting plate is fixedly connected to a reaction barrel, and two circulation pipes are symmetrically and fixedly connected in the reaction barrel, and a three-way pipe is fixedly connected between the upper and lower ends of the two circulation pipes, and a filter cartridge is fixedly connected to the outer end of the upper three-way pipe, and a fixing ring is fixedly connected in the filter cartridge, and a filter screen is fixedly connected to the fixing ring by screws, and a cleaning structure for cleaning the filter screen is provided on the lower side of the filter screen, and an air inlet pipe is fixedly connected to the outer side wall of the filter cartridge, and a top cover and a bottom cover are respectively threadedly connected at the upper and lower ends of the filter cartridge, and a stirring structure is provided in the reaction barrel.

[0012] As a preferred technical solution of the utility model, the driving structure includes driven bevel gears respectively fixed at the front end of the threaded rod, two connecting blocks are symmetrically and fixedly connected to the front end of the base plate, a rotating rod is rotatably connected between the two connecting blocks, two active bevel gears are fixedly connected to the rotating rod and are respectively meshed with the driven bevel gears, and a handwheel is fixedly connected to one end of the rotating rod.

[0013] As a preferred technical solution of the utility model, the cleaning structure includes a supporting plate fixed in the filter cartridge, the upper end surface of the supporting plate is rotatably connected to a mounting shaft, a group of fan blades are evenly fixedly connected to the outer side wall of the mounting shaft, the top end of the mounting shaft is fixedly connected to a mounting head, a cleaning brush is installed on the mounting head, and a nut is threadedly connected to the top end of the mounting head.

[0014] As a preferred technical solution of the utility model, the stirring structure includes a motor fixed on the upper end surface of the reaction barrel, the driving end of the motor passes through the top wall of the reaction barrel and is fixedly connected to a stirring shaft, and a group of stirring blades are evenly and fixedly connected to the stirring shaft.

[0015] As a preferred technical solution of the utility model, the upper end surface of the reaction barrel is fixedly connected with a water supply pipe, the lower end surface of the reaction barrel is fixedly connected with a drainage pipe, and the outer ends of the water supply pipe and the drainage pipe are both equipped with solenoid valves.

[0016] As a preferred technical solution of the utility model, a mounting opening is provided on the reaction barrel, and a tempered glass is sealed and fixedly connected in the mounting opening.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] In the solution of the utility model:

[0019] 1. Through the provided circulation pipe, three-way pipe, filter cartridge, fixed ring, filter screen and cleaning structure, the particulate matter in the flue gas is filtered to ensure the effect of flue gas recycling. It can also avoid air pollution during discharge, ensure the effect of flue gas recirculation, and solve the problem of inconvenience in filtering particulate matter in the flue gas in the prior art;

[0020] 2. By setting the threaded rod, driving structure, lifting plate, guide rod, slider, first connecting seat, lifting frame, adjustment block and second connecting seat, the corresponding height adjustment according to the gas boiler in different positions is realized, which is more aesthetically pleasing and solves the problem of easy slipping during height adjustment in the prior art, which makes it inconvenient to effectively adjust the height. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the overall structure of the gas boiler flue gas recirculation device provided by the utility model;

[0022] Figure 2 A side structural diagram of a gas boiler flue gas recirculation device provided by the utility model;

[0023] Figure 3 A schematic diagram of the internal structure of a reaction barrel of a gas boiler flue gas recirculation device provided by the utility model;

[0024] Figure 4 A schematic diagram of the driving structure of the gas boiler flue gas recirculation device provided by the utility model;

[0025] Figure 5 A schematic diagram of the internal structure of the filter cartridge of the gas boiler flue gas recirculation device provided by the utility model;

[0026] Figure 6 This is a schematic diagram of the cleaning structure of the gas boiler flue gas recirculation device provided by the utility model.

[0027] Indicated in the figure:

[0028] 1. Bottom plate; 2. Universal wheel; 3. Threaded rod; 4. Driving structure; 401. Driven bevel gear; 402. Connecting block; 403. Rotating rod; 404. Active bevel gear; 405. Hand wheel; 5. Lifting plate; 6. Guide rod; 7. Sliding block; 8. First connecting seat; 9. Lifting frame; 10. Adjusting block; 11. Second connecting seat; 12. Reaction barrel; 13. Circulating pipe; 14. Three-way pipe; 15. Filter cartridge; 16. Fixing ring; 17. Filter; 18. Cleaning structure; 1801. Carrying plate; 1802. Mounting shaft; 1803. Fan blade; 1804. Mounting head; 1805. Cleaning brush; 1806. Nut; 19. Air inlet pipe; 20. Top cover; 21. Bottom cover; 22. Stirring structure; 2201. Motor; 2202. Stirring shaft; 2203. Stirring blade; 23. Water adding pipe; 24. Drain pipe; 25. Solenoid valve; 26. Tempered glass. DETAILED DESCRIPTION

[0029] To make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be described clearly and completely in conjunction with the accompanying drawings. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments.

[0030] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6As shown, the present embodiment proposes a gas boiler flue gas recirculation device, comprising a bottom plate 1, universal wheels 2 are fixed at the four corners of the lower end surface of the bottom plate 1, both ends of the bottom plate 1 are rotatably connected with threaded rods 3, and a driving structure 4 for simultaneously driving the threaded rods 3 to rotate is provided on the front side of the bottom plate 1, which can conveniently drive the two threaded rods 3 to rotate at the same time, thereby synchronously controlling the lifting and lowering of a lifting plate 5, a lifting plate 5 is provided on the upper side of the bottom plate 1, both ends of the lower end surface of the lifting plate 5 are fixedly connected with guide rods 6, and sliders 7 are slidably connected to the guide rods 6, and the lower end surface of the lifting plate 5 is symmetrical and fixedly connected with two first connecting seats 8, and a lifting frame 9 is rotatably connected between the slider 7 and the first connecting seat 8 on the same side, and an adjusting block 10 and a second connecting seat 11 are rotatably connected at the two ends of the bottom of the lifting frame 9, respectively, and the adjusting block 10 is threadedly connected to the threaded rod 3, and the second connecting seat 11 is fixedly connected to the bottom plate 1, which is convenient for stable alignment. The height can be adjusted, and it occupies a smaller space when folded and stored, and it is more aesthetically pleasing. A reaction barrel 12 is fixedly connected to the upper end surface of the lifting plate 5. Two circulation pipes 13 are symmetrically and fixedly connected in the reaction barrel 12, which is convenient for uniformly heating the cold water in the reaction barrel 12. A three-way pipe 14 is fixedly connected between the upper and lower ends of the two circulation pipes 13. A filter cartridge 15 is fixedly connected to the outer end of the upper three-way pipe 14. A fixing ring 16 is fixedly connected in the filter cartridge 15. The fixing ring 16 is fixedly connected to a filter screen 17 by screws, which is convenient for filtering the flue gas and facilitating subsequent recycling. A cleaning structure 18 for cleaning the filter screen 17 is provided on the lower side of the filter screen 17. An air inlet pipe 19 is fixedly connected to the outer side wall of the filter cartridge 15. The upper and lower ends of the filter cartridge 15 are respectively threadedly connected with a top cover 20 and a bottom cover 21, which are convenient for disassembly and cleaning. A stirring structure 22 is provided in the reaction barrel 12 to heat the water evenly.

[0031] like Figure 1 and Figure 4 As shown, as a preferred embodiment, on the basis of the above-mentioned method, further, the driving structure 4 includes driven bevel gears 401 respectively fixed at the front ends of the threaded rods 3, two connecting blocks 402 are symmetrically and fixedly connected to the front end of the base plate 1, a rotating rod 403 is rotatably connected between the two connecting blocks 402, and two active bevel gears 404 respectively meshing with the driven bevel gears 401 are fixedly connected to the rotating rod 403, and a hand wheel 405 is fixedly connected to one end of the rotating rod 403, which is convenient for driving the two threaded rods 3 to rotate at the same time, thereby facilitating rapid adjustment of the height.

[0032] like Figure 5 and Figure 6As shown, as a preferred embodiment, on the basis of the above-mentioned method, further, the cleaning structure 18 includes a supporting plate 1801 fixed in the filter cartridge 15, the upper end surface of the supporting plate 1801 is rotatably connected with a mounting shaft 1802, a group of fan blades 1803 are evenly and fixedly connected to the outer wall of the mounting shaft 1802, the top of the mounting shaft 1802 is fixedly connected with a mounting head 1804, a cleaning brush 1805 is installed on the mounting head 1804, and a nut 1806 is threadedly connected to the top of the mounting head 1804; the airflow through the air inlet pipe 19 drives the fan blades 1803 to rotate, thereby driving the cleaning brush 1805 to clean the filter screen 17, and the filter screen 17 can be automatically cleaned, thereby improving the usability and maintenance efficiency of the device.

[0033] like Figure 1 and Figure 3 As shown, as a preferred embodiment, on the basis of the above method, further, the stirring structure 22 includes a motor 2201 fixed on the upper end surface of the reaction barrel 12, the driving end of the motor 2201 passes through the top wall of the reaction barrel 12 and is fixedly connected to a stirring shaft 2202, and a group of stirring blades 2203 are evenly fixedly connected to the stirring shaft 2202; the water in the reaction barrel 12 is made to flow, so that the water in the reaction barrel 12 can be evenly heated.

[0034] like Figure 1 and Figure 3 As shown, as a preferred embodiment, on the basis of the above-mentioned method, further, the upper end surface of the reaction barrel 12 is fixedly connected with a water adding pipe 23, and the lower end surface of the reaction barrel 12 is fixedly connected with a drain pipe 24, and the outer ends of the water adding pipe 23 and the drain pipe 24 are both installed with solenoid valves 25. Through the design of the water adding pipe 23 and the drain pipe 24, the user can add the required water or other liquid into the reaction barrel 12, and discharge the treated liquid through the drain pipe 24. The addition of the solenoid valve 25 makes the water adding and draining process more convenient and accurate.

[0035] like Figure 1 As shown, as a preferred embodiment, on the basis of the above-mentioned method, further, an installation opening is opened on the reaction barrel 12, and a tempered glass 26 is sealed and fixedly connected in the installation opening, providing a window for the user to observe the internal situation of the reaction barrel 12, which helps the user to understand the operating status and treatment effect of the device in real time.

[0036] Specifically, when the gas boiler flue gas recirculation device is working / in use: a proper amount of cold water is added to the reaction barrel 12 through the water adding pipe 23, and then the flue gas is passed into the filter cartridge 15 through the air inlet pipe 19, and the filter screen 17 filters the particulate matter in the flue gas, and the fan blades 1803 and the installation shaft 1802 are driven to rotate by the flow of the flue gas, and then the cleaning brush 1805 is rotated, so as to clean the filter screen 17 and ensure the cleanliness of the filter screen 17. The purified flue gas enters the circulation pipe 13 through the three-way pipe 14 on the upper side, and the flue gas is filtered by the filter screen 17. The heat heats the cold water in the reaction barrel 12, and at the same time, the motor 2201 is started to rotate the stirring shaft 2202 and the stirring blade 2203, which can stir the water and ensure the uniformity of heating; when the height adjustment is required, the hand wheel 405 is turned to rotate the rotating rod 403 and the two active bevel gears 404 at the same time, thereby driving the driven bevel gear 401 and the threaded rod 3 to rotate at the same time, and the rotation of the threaded rod 3 causes the adjustment block 10 to move, thereby causing the lifting frame 9 to move, driving the lifting plate 5 to adjust the height, so as to facilitate flexible adjustment of the height according to actual conditions.

[0037] All technical features in this embodiment can be freely combined according to actual needs.

[0038] The above embodiments are preferred implementation schemes of the present invention. In addition, the present invention can also be implemented in other ways. Any obvious replacement without departing from the concept of the present technical solution is within the protection scope of the present invention.

Claims

1. A gas boiler flue gas recirculation device, comprising a bottom plate (1), characterized in that: Universal wheels (2) are fixed at the four corners of the lower end surface of the base plate (1), and threaded rods (3) are rotatably connected at both ends of the base plate (1). A driving structure (4) for simultaneously driving the threaded rods (3) to rotate is provided on the front side of the base plate (1). A lifting plate (5) is provided on the upper side of the base plate (1), and guide rods (6) are fixedly connected at both ends of the lower end surface of the lifting plate (5), and sliders (7) are slidably connected to the guide rods (6). Two first connecting seats (8) are symmetrically and fixedly connected to the lower end surface of the lifting plate (5), and a lifting frame (9) is rotatably connected between the sliders (7) and the first connecting seats (8) on the same side. An adjusting block (10) and a second connecting seat (11) are rotatably connected at the two ends of the bottom of the lifting frame (9), respectively. The adjusting block (10) is threadedly connected to the threaded rod (3), and the second connecting seat (11) is rotatably connected to the adjusting block (10). The lifting plate (5) is fixedly connected to the bottom plate (1), and a reaction barrel (12) is fixedly connected to the upper end surface of the lifting plate (5). Two circulation pipes (13) are symmetrically and fixedly connected in the reaction barrel (12). A three-way pipe (14) is fixedly connected between the upper and lower ends of the two circulation pipes (13). A filter cartridge (15) is fixedly connected to the outer end of the upper three-way pipe (14). A fixing ring (16) is fixedly connected in the filter cartridge (15). A filter screen (17) is fixedly connected to the fixing ring (16) by screws. A cleaning structure (18) for cleaning the filter screen (17) is provided on the lower side. An air inlet pipe (19) is fixedly connected to the outer wall of the filter cartridge (15). A top cover (20) and a bottom cover (21) are respectively threadedly connected at the upper and lower ends of the filter cartridge (15). A stirring structure (22) is provided in the reaction barrel (12).

2. A gas boiler flue gas recirculation device according to claim 1, characterized in that: The driving structure (4) comprises driven bevel gears (401) respectively fixed to the front ends of the threaded rods (3); the front end of the base plate (1) is symmetrically and fixedly connected to two connecting blocks (402); a rotating rod (403) is rotatably connected between the two connecting blocks (402); the rotating rod (403) is fixedly connected to two driving bevel gears (404) respectively meshing with the driven bevel gears (401); and one end of the rotating rod (403) is fixedly connected to a hand wheel (405).

3. A gas boiler flue gas recirculation device according to claim 1, characterized in that: The cleaning structure (18) comprises a supporting plate (1801) fixed in the filter cartridge (15); the upper end surface of the supporting plate (1801) is rotatably connected to a mounting shaft (1802); a group of fan blades (1803) are evenly and fixedly connected to the outer wall of the mounting shaft (1802); the top end of the mounting shaft (1802) is fixedly connected to a mounting head (1804); a cleaning brush (1805) is mounted on the mounting head (1804); and the top end of the mounting head (1804) is threadedly connected to a nut (180) 6.

4. A gas boiler flue gas recirculation device according to claim 1, characterized in that: The stirring structure (22) comprises a motor (2201) fixed to the upper end surface of the reaction barrel (12); the driving end of the motor (2201) penetrates the top wall of the reaction barrel (12) and is fixedly connected to a stirring shaft (2202); a group of stirring blades (2203) are evenly and fixedly connected to the stirring shaft (2202).

5. The gas boiler flue gas recirculation device according to claim 1, characterized in that: The upper end surface of the reaction barrel (12) is fixedly connected to a water supply pipe (23), and the lower end surface of the reaction barrel (12) is fixedly connected to a drainage pipe (24). Solenoid valves (25) are installed at the outer ends of the water supply pipe (23) and the drainage pipe (24).

6. A gas boiler flue gas recirculation device according to claim 1, characterized in that: The reaction barrel (12) is provided with a mounting opening, and a tempered glass (26) is sealed and fixedly connected in the mounting opening.

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