Flue gas recirculation device for gas-fired boiler

Abstract

The utility model discloses a flue gas recirculation device for a gas-fired boiler, and particularly relates to the technical field of gas-fired boilers, the flue gas recirculation device comprises a discharge pipe, a gas-fired boiler main body and a gas inlet pipe, the top end of the discharge pipe is fixedly communicated with the gas-fired boiler main body, and the front end of the gas inlet pipe is fixedly communicated with the gas inlet end of the gas-fired boiler main body; a heat preservation shell is fixedly connected to the outer side of the gas boiler body, the discharging pipe and the gas inlet pipe both penetrate through the heat preservation shell and are fixedly connected with the heat preservation shell, and a first gas guide pipe is fixedly connected into the heat preservation shell. Smoke is purified through the catalytic partition plate, the purified smoke flows into the heat preservation shell through the second gas guide pipe, heat preservation is conducted on the gas-fired boiler body, the hasp is opened to remove fixation between the frame cover and the storage frame, the filter screen and the catalytic partition plate are taken out and cleaned and replaced, and similarly, the filter screen and the catalytic partition plate are installed. The structure is simple, and the catalytic partition plate is convenient to disassemble and replace.

Description

Technical Field

[0001] The utility model relates to the technical field of gas boilers, and more specifically, to a flue gas recirculation device for gas boilers. Background Art

[0002] Gas boilers are boilers that use gas as fuel and are mainly used to provide steam, hot water or heating. They are widely used in schools, hospitals, guesthouses, and other places, and have the advantages of high efficiency, environmental protection, and energy saving. The moisture generated by the combustion of existing gas boilers will remain in the exhaust gas treatment device after cooling after the combustion is completed, causing a large amount of heat to be taken away by water vapor when the device is used next time.

[0003] After searching, the Chinese patent with the announcement number CN218993425U discloses a flue gas recirculation device for a gas boiler. Through the temperature sensor, when the temperature is sensed to be too high, the vacuum air pump can be started to draw the exhaust gas in the exhaust catalytic chamber into the main heating chamber, thereby minimizing heat loss and improving energy utilization. The vacuum layer can play a heat-insulating role and reduce heat loss.

[0004] When the above-mentioned flue gas recirculation device is in use, the catalytic baffle can catalyze the flue gas, but the catalytic baffle will gradually fail during use, affecting the flue gas treatment effect. Since the catalytic baffle and the interior of the exhaust gas catalytic chamber are fixed, it is not convenient to disassemble and replace the catalytic baffle. Utility Model Content

[0005] In order to overcome the above-mentioned defects of the prior art, the utility model provides a flue gas recirculation device for a gas boiler, aiming to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a flue gas recirculation device for a gas boiler, comprising a discharge pipe, a gas boiler main body and an air inlet pipe, the top end of the discharge pipe is fixedly connected to the gas boiler main body, and the front end of the air inlet pipe is fixedly connected to the air inlet end of the gas boiler main body, the outer side of the gas boiler main body is fixedly connected with a heat-insulating shell, and the discharge pipe and the air inlet pipe both penetrate the heat-insulating shell and are fixedly connected thereto, the interior of the heat-insulating shell is fixedly connected with a first air guide pipe, and one end of the first air guide pipe is fixedly connected to the gas boiler main body, and the other end of the first air guide pipe is provided with a purification component, the purification component comprises a storage frame, a filter screen, a catalytic baffle and two limit blocks, the top end of the storage frame is fixedly connected to the first air guide pipe, and one side of the storage frame is fixedly connected to the heat-insulating shell, the filter screen and the catalytic baffle are both movably arranged in the storage frame, the opposite sides of the two limit blocks are fixedly connected to the storage frame, and the front side of the storage frame is movably connected with a frame cover by a buckle.

[0007] Furthermore, a square gasket is movably arranged between the frame cover and the storage frame, and one side of the square gasket is in contact with the filter screen and the catalytic separator.

[0008] It can be seen that in the above technical solution, the square gasket can improve the sealing between the frame cover and the storage frame.

[0009] Furthermore, the bottom end of the storage frame is fixedly connected to a second air duct, and the other end of the second air duct is fixedly connected to the heat-insulating outer shell.

[0010] Furthermore, a side of the heat-insulating shell away from the first air duct is fixedly connected to a third air duct, a first valve is fixedly installed on the third air duct, a water storage frame is movably provided at the bottom of the third air duct, and one side of the water storage frame is fixedly connected to the heat-insulating shell.

[0011] Furthermore, a second valve is movably provided at the bottom of the heat-insulating shell and is fixedly mounted on the discharge pipe. A support seat is movably provided at the outer side of the second valve and the top of the support seat is fixedly connected to the heat-insulating shell.

[0012] It can be seen that in the above technical solution, by opening the second valve, the waste in the gas boiler body can be discharged through the discharge pipe, and at the same time the support seat supports the insulation shell and keeps the discharge pipe away from the ground.

[0013] Furthermore, a sealing cover is threadedly connected to the top of the heat-insulating shell, a circular gasket is movably provided at the bottom of the sealing cover, and the bottom end of the circular gasket is in contact with the heat-insulating shell, and the top of the sealing cover is connected to a feed pipe.

[0014] It can be seen that in the above technical solution, the sealing cover is rotated and moved away from the insulation shell, the interior of the gas boiler body is cleaned, and the sealing cover is installed in the same way. The circular gasket can improve the sealing between the sealing cover and the insulation shell.

[0015] Furthermore, a thermometer is movably provided on the front side of the feed pipe, and the thermometer is fixedly installed on the top end of the sealing cover.

[0016] It can be seen that in the above technical solution, the thermometer detects the temperature inside the gas boiler body.

[0017] Technical effects and advantages of the utility model:

[0018] 1. In the utility model, the flue gas enters the storage frame through the first air duct, the catalytic baffle purifies the flue gas, and the purified flue gas flows into the heat-insulating shell through the second air duct to insulate the main body of the gas boiler. The buckle is opened to release the fixation between the frame cover and the storage frame, and the filter screen and the catalytic baffle are taken out and cleaned and replaced. Similarly, the filter screen and the catalytic baffle are installed. The structure is simple, and the catalytic baffle can be easily disassembled and replaced;

[0019] 2. The utility model pours water into the water storage frame and then opens the first valve. The smoke in the heat-insulating shell can be discharged through the third air duct to form a complete air duct. At the same time, the smoke contacts with water and absorbs some harmful substances in the smoke through the water. The structure is simple and easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The structures, proportions, sizes, etc. illustrated in this specification are only used to match the contents disclosed in the specification so as to facilitate understanding and reading by persons familiar with the technology. They are not used to limit the conditions under which the present invention can be implemented, and therefore have no substantial technical significance. Any structural modification, change in proportion or adjustment of size shall still fall within the scope of the technical contents disclosed in the present invention without affecting the effects and purposes that can be achieved by the present invention.

[0021] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0022] Figure 2 This is a bottom view of the overall structure of the utility model;

[0023] Figure 3 It is a front view of the overall structure of the utility model;

[0024] Figure 4 It is a cross-sectional view of the heat-insulating shell and the assembly structure diagram of the main body of the gas boiler of the utility model;

[0025] Figure 5 This is a schematic diagram of the assembly structure of the gas boiler main body and the air inlet pipe of the utility model;

[0026] Figure 6 It is a schematic diagram of the assembly structure of the first air guide pipe and the purification component of the utility model.

[0027] In the figure: 1. insulation shell; 2. sealing cover; 3. feed pipe; 4. thermometer; 5. first air duct; 6. purification component; 7. second air duct; 8. frame cover; 9. third air duct; 10. first valve; 11. water storage frame; 12. support seat; 13. discharge pipe; 14. second valve; 15. gas boiler body; 16. air inlet pipe; 17. round gasket; 601. storage frame; 602. filter; 603. catalytic baffle; 604. limit block; 605. square gasket. DETAILED DESCRIPTION

[0028] The following is a specific embodiment of the present invention. People familiar with the technology can easily understand the other advantages and functions of the present invention from the contents disclosed in this specification. Obviously, the described embodiment is a part 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.

[0029] Refer to the instruction manual Figure 1-6 The flue gas recirculation device for a gas boiler of this embodiment includes a discharge pipe 13, a gas boiler body 15 and an air inlet pipe 16. The top end of the discharge pipe 13 is fixedly connected to the gas boiler body 15, and the front end of the air inlet pipe 16 is fixedly connected to the air inlet end of the gas boiler body 15. The outer side of the gas boiler body 15 is fixedly connected to a heat-insulating shell 1, and the discharge pipe 13 and the air inlet pipe 16 both penetrate the heat-insulating shell 1 and are fixedly connected thereto. The interior of the heat-insulating shell 1 is fixedly connected to a first air guide pipe 5, and one end of the first air guide pipe 5 is fixedly connected to the gas boiler body 15. The other end of the first air guide pipe 5 is provided with a purification component 6. The purification component 6 includes a storage frame 601, a filter screen 602, a catalytic baffle 603 and two limiting blocks 604. The top of the storage frame 601 is fixedly connected to the first air duct 5, and one side of the storage frame 601 is fixedly connected to the heat-insulating shell 1. The filter screen 602 and the catalytic baffle 603 are movably arranged in the storage frame 601. The opposite sides of the two limiting blocks 604 are fixedly connected to the storage frame 601. The front side of the storage frame 601 is movably connected to the frame cover 8 through a buckle. A square gasket 605 is movably arranged between the frame cover 8 and the storage frame 601, and one side of the square gasket 605 is in contact with the filter screen 602 and the catalytic baffle 603.

[0030] Furthermore, the bottom end of the storage frame 601 is fixedly connected to a second air duct 7, and the other end of the second air duct 7 is fixedly connected to the heat-insulating outer shell 1, and the side of the heat-insulating outer shell 1 away from the first air duct 5 is fixedly connected to a third air duct 9, and a first valve 10 is fixedly installed on the third air duct 9, and a water storage frame 11 is movably provided at the bottom of the third air duct 9, and one side of the water storage frame 11 is fixedly connected to the heat-insulating outer shell 1.

[0031] Among them, water is poured into the water storage frame 11, and then the first valve 10 is opened. The smoke in the heat-insulating shell 1 can be discharged through the third air duct 9 to form a complete air duct. At the same time, the smoke contacts with water and absorbs some harmful substances in the smoke through the water. The structure is simple and easy to use.

[0032] Furthermore, a second valve 14 is movably provided at the bottom of the thermal insulation shell 1, and the second valve 14 is fixedly installed on the discharge pipe 13. A support seat 12 is movably provided on the outer side of the second valve 14, and the top of the support seat 12 is fixedly connected to the thermal insulation shell 1. When the second valve 14 is opened, the waste in the gas boiler body 15 can be discharged through the discharge pipe 13. At the same time, the support seat 12 supports the thermal insulation shell 1 and keeps the discharge pipe 13 away from the ground.

[0033] Furthermore, a sealing cover 2 is threadedly connected to the top of the insulation shell 1, a circular gasket 17 is movably provided at the bottom of the sealing cover 2, and the bottom end of the circular gasket 17 is in contact with the insulation shell 1, and the top of the sealing cover 2 is connected to the feed pipe 3. The sealing cover 2 is rotated and kept away from the insulation shell 1, and the interior of the gas boiler body 15 is cleaned. Similarly, the sealing cover 2 is installed. The circular gasket 17 can improve the sealing between the sealing cover 2 and the insulation shell 1.

[0034] Furthermore, a thermometer 4 is movably provided on the front side of the feed pipe 3 , and the thermometer 4 is fixedly installed on the top of the sealing cover 2 . The thermometer 4 can detect the temperature inside the gas boiler body 15 .

[0035] The method of using this embodiment is:

[0036] During use, the gas enters the gas boiler body 15 through the air inlet pipe 16, the material enters the gas boiler body 15 through the feed pipe 3, the flue gas generated by the gas boiler body 15 enters the storage frame 601 through the first air duct 5, the filter 602 filters the dust in the flue gas, the catalytic baffle 603 purifies the flue gas, and the purified flue gas flows into the thermal insulation shell 1 through the second air duct 7 to insulate the gas boiler body 15. The buckle is opened to release the fixation between the frame cover 8 and the storage frame 601, the filter 602 and the catalytic baffle 603 are taken out and cleaned and replaced, and the filter 602 and the catalytic baffle 603 are installed in the same way. The structure is simple, and the catalytic baffle 603 is convenient to disassemble and replace. At the same time, the two limit blocks 604 can limit the upward movement of the filter 602 and the catalytic baffle 603, and the square gasket 605 can improve the sealing between the frame cover 8 and the storage frame 601.

[0037] The contents not described in detail in the specification belong to the prior art known to those skilled in the art, and the model parameters of each electrical appliance are not specifically limited and can be determined using conventional equipment. In this technical solution, the electrical control components not mentioned are not shown in the figure because they belong to the prior art and will not be described here.

[0038] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A flue gas recirculation device for a gas boiler, comprising a discharge pipe (13), a gas boiler body (15) and an air inlet pipe (16), wherein the top end of the discharge pipe (13) is fixedly connected to the gas boiler body (15), and the front end of the air inlet pipe (16) is fixedly connected to the air inlet end of the gas boiler body (15), characterized in that: The outer side of the gas boiler body (15) is fixedly connected to a heat-insulating shell (1), and the discharge pipe (13) and the air inlet pipe (16) both penetrate the heat-insulating shell (1) and are fixedly connected thereto. The interior of the heat-insulating shell (1) is fixedly connected to a first air guide pipe (5), and one end of the first air guide pipe (5) is fixedly connected to the gas boiler body (15). The other end of the first air guide pipe (5) is provided with a purification component (6), and the purification component (6) comprises a storage frame (601), a filter screen (602), A catalytic baffle (603) and two limiting blocks (604); the top end of the storage frame (601) is fixedly connected to the first air duct (5), and one side of the storage frame (601) is fixedly connected to the heat-insulating shell (1); the filter screen (602) and the catalytic baffle (603) are movably arranged in the storage frame (601); the opposite sides of the two limiting blocks (604) are fixedly connected to the storage frame (601); and the front side of the storage frame (601) is movably connected to a frame cover (8) via a buckle.

2. The flue gas recirculation device for a gas boiler according to claim 1, characterized in that: A square gasket (605) is movably provided between the frame cover (8) and the storage frame (601), and one side of the square gasket (605) is in contact with the filter screen (602) and the catalytic separator (603).

3. The flue gas recirculation device for a gas boiler according to claim 1, characterized in that: The bottom end of the storage frame (601) is fixedly connected to a second air duct (7), and the other end of the second air duct (7) is fixedly connected to the heat-insulating outer shell (1).

4. The flue gas recirculation device for a gas boiler according to claim 1, characterized in that: A third air duct (9) is fixedly connected to a side of the heat-insulating outer shell (1) away from the first air duct (5); a first valve (10) is fixedly mounted on the third air duct (9); a water storage frame (11) is movably arranged at the bottom of the third air duct (9); and one side of the water storage frame (11) is fixedly connected to the heat-insulating outer shell (1).

5. The flue gas recirculation device for a gas boiler according to claim 1, characterized in that: A second valve (14) is movably provided at the bottom of the heat-insulating outer shell (1), and the second valve (14) is fixedly mounted on the discharge pipe (13); a support seat (12) is movably provided outside the second valve (14), and the top end of the support seat (12) is fixedly connected to the heat-insulating outer shell (1).

6. The flue gas recirculation device for a gas boiler according to claim 1, characterized in that: The top end of the heat-insulating outer shell (1) is threadedly connected to a sealing cover (2), the bottom of the sealing cover (2) is movably provided with a circular gasket (17), and the bottom end of the circular gasket (17) is in contact with the heat-insulating outer shell (1), and the top end of the sealing cover (2) is connected to a feed pipe (3).

7. The flue gas recirculation device for a gas boiler according to claim 6, characterized in that: A thermometer (4) is movably provided on the front side of the feed pipe (3), and the thermometer (4) is fixedly mounted on the top end of the sealing cover (2).

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