Combustor for gas-fired boiler

Abstract

The utility model discloses a burner for a gas-fired boiler, which comprises a fan, a gas inlet, a gas outlet, a gas inlet pipe, a gas outlet pipe, a gas inlet pipe and a gas outlet pipe, the combustion head is arranged at the front end of the air outlet in a communicating manner; the gas pipeline is communicated with the combustion head; the air inlet pipe is communicated with the air inlet, and the lower end of the air inlet pipe is open; the first butterfly valve is arranged at the opening position of the air inlet pipe; the return pipe is horizontally communicated with the interior of the air inlet pipe; and the second butterfly valve is arranged in the return pipe. Compared with the prior art, the burner has the advantages that the backflow pipe is arranged on the fan, smoke generated after burning is introduced into the fan again and burnt again in the burning head, sufficient burning of fuel gas is achieved, waste of resources and pollution to the environment are reduced, meanwhile, in the smoke backflow process, the temperature of the smoke can be reduced, and the environment is protected. The formation of oxynitride is reduced, and the pollution to the environment is reduced.

Description

Technical Field

[0001] The utility model relates to the field of gas boilers, in particular to a burner for gas boilers. Background Art

[0002] A gas boiler refers to a boiler whose fuel is gas. Compared with oil boilers and electric boilers, gas boilers are the most economical, so most people choose gas boilers as boiler equipment for steam, heating and bathing.

[0003] Traditional gas boilers mix gas and air and then ignite them. The heat generated by the combustion is exchanged with the heat exchange medium in the boiler water tank, and the flue gas generated after combustion is usually discharged directly to the outside through an exhaust pipe.

[0004] However, when a gas boiler is burning, the nitrogen and oxygen in the flue gas will form nitrogen oxides that pollute the environment, and the incompletely burned gas discharged into the air will also cause environmental pollution, which needs to be improved. Utility Model Content

[0005] In view of the deficiencies in the prior art, the purpose of the utility model is to provide a burner for a gas boiler, which has the effect of reducing environmental pollution.

[0006] The above technical purpose of the utility model is achieved through the following technical solutions: A burner for a gas boiler, comprising:

[0007] The fan has an air inlet on the side wall and an air outlet at the front end;

[0008] A combustion head, connected and arranged at the front end of the air outlet;

[0009] A gas pipeline connected to the combustion head;

[0010] An air inlet pipe is arranged at the air inlet position and has an opening at the lower end;

[0011] A first butterfly valve, arranged at the opening position of the air inlet pipe;

[0012] A return pipe horizontally connected to the interior of the air inlet pipe;

[0013] The second butterfly valve is arranged in the reflux pipe.

[0014] In a preferred example, the utility model can be further configured as follows: a scale plate is provided on the outer wall of the return pipe, and a pointer is provided on the rotating shaft of the second butterfly valve.

[0015] In a preferred example, the utility model can be further configured as follows: the burner head includes an outer shell, an end head, a gas pipe, and an air pipe; the outer shell is arranged at the air outlet position; the end head is arranged at the end of the outer shell; the gas pipe is connected to the end head, is horizontally arranged in the outer shell, and extends into the air outlet; the gas pipeline is connected to the gas pipe; the air pipe is horizontally arranged in the gas pipe, passes through both ends of the gas pipe, and extends into the air outlet.

[0016] In a preferred example, the utility model can be further configured as follows: a right-angle connector is provided in the air outlet, the vertical section of the connector is connected to the gas pipeline, the gas pipe is plugged into the horizontal section of the connector, and the air pipe passes through the horizontal section of the connector.

[0017] In a preferred example, the utility model can be further configured as follows: the fan includes a chassis, an impeller and a motor, the chassis is connected to the air outlet, the impeller is rotatably connected to the chassis, the motor is used to control the rotation of the impeller, the impeller includes a mounting plate, a support plate and a plurality of blades, the mounting plate is connected to the motor, the support plate is arranged parallel to the mounting plate, and is provided with a channel connected to the air inlet pipe, the blades are arranged in an arc shape between the mounting plate and the support plate, and are distributed around the channel.

[0018] In a preferred example, the utility model can be further configured as follows: a side wall of the air inlet duct is provided with a sleeve inserted into the chassis, a plug is provided on the support plate and embedded in the sleeve, the plug is coaxially arranged with the channel, and an air intake gap is formed between the plug and the sleeve.

[0019] In a preferred example, the utility model can be further configured as follows: an inspection hole is provided on the upper end surface of the chassis, and a cover plate is provided on the inspection hole.

[0020] In summary, the utility model has the following beneficial effects:

[0021] 1. By setting a return pipe on the fan, the flue gas generated after combustion is reintroduced into the fan and burned again in the combustion head, so as to achieve full combustion of the gas, reduce the waste of resources and pollution to the environment. At the same time, in the process of flue gas reflux, the temperature of the flue gas can be reduced, the formation of nitrogen oxides can be reduced, and the pollution to the environment can be reduced;

[0022] 2. By setting up a highly efficient combustion head, the gas and air can be fully mixed and burned, reducing the waste of gas resources and the pollution to the environment;

[0023] 3. By setting up a high-stability fan, air can be stably delivered to the combustion head to ensure sufficient oxygen supply and stable operation of the combustion head. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of an embodiment;

[0025] Figure 2 is a schematic structural diagram of a gas pipeline of an embodiment;

[0026] Figure 3 is a schematic structural diagram of a combustion head of an embodiment;

[0027] Figure 4 Schematic diagram of the structure of the fan of the embodiment.

[0028] Figure numerals: 1. fan; 11. air inlet; 12. air outlet; 13. chassis; 14. impeller; 141. mounting plate; 142. support plate; 143. blades; 144. channel; 145. sleeve; 146. insert; 15. motor; 16. inspection hole; 17. cover plate; 2. combustion head; 21. outer shell; 22. end; 23. gas pipe; 24. air pipe; 25. connector; 3. gas pipeline; 4. air inlet pipe; 5. first butterfly valve; 6. return pipe; 61. scale plate; 7. second butterfly valve; 71. pointer. DETAILED DESCRIPTION

[0029] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0030] like Figure 1 , Figure 2 As shown, a burner for a gas boiler includes a fan 1, a combustion head 2, a gas pipe 23, an air inlet pipe 4, a first butterfly valve 5, a return pipe 6 and a second butterfly valve 7. The fan 1 has an air inlet 11 on its side wall and an air outlet 12 at its front end. The combustion head 2 is horizontally connected to the front end of the air outlet 12, and the gas pipe 23 is connected to the combustion head 2 to supply fuel.

[0031] like Figure 1 , Figure 2 As shown, the air inlet pipe 4 is connected to the air inlet 11, and the lower end is open. The first butterfly valve 5 is arranged at the opening position of the air inlet pipe 4 to realize the opening and closing control of the air inlet pipe 4. The return pipe 6 is horizontally connected to the inside of the air inlet pipe 4, and the second butterfly valve 7 is arranged in the return pipe 6 to realize the opening and closing control of the return pipe 6. The outer wall of the return pipe 6 is provided with a scale plate 61, and the rotating shaft of the second butterfly valve 7 is provided with a pointer 71 to facilitate the observation of the opening of the second butterfly valve 7 and control the flow of the return pipe 6.

[0032] When the burner is working, the fan 1 delivers air into the combustion head 2, and the gas pipe 23 delivers gas into the combustion head 2, so as to achieve sufficient mixing and combustion of the gas and air. Subsequently, the exhaust gas generated by the combustion is re-transported to the fan 1 through the reflux pipe 6, and is passed into the combustion head 2 for secondary combustion, so that the incompletely burned gas can be burned again, reducing the waste of resources and pollution to the environment.

[0033] At the same time, in the process of flue gas reflow, the temperature of flue gas can be reduced, the formation of nitrogen oxides can be reduced, and the pollution to the environment can be reduced. And during operation, the first butterfly valve 5 and the second butterfly valve 7 can cooperate to realize the free switching supply of air and exhaust gas or the synchronous supply of the two, so as to ensure the stable operation of the burner.

[0034] like Figure 3 As shown, the burner head 2 includes a housing 21, a terminal 22, a gas pipe 23, and an air pipe 24. The housing 21 is disposed at the air outlet 12, the terminal 22 is disposed at the end of the housing 21, the gas pipe 23 is connected to the terminal 22, and is horizontally disposed in the housing 21 and extends into the air outlet 12.

[0035] like Figure 3 As shown, a right-angle connector 25 is provided in the air outlet 12, the vertical section of the connector 25 is connected to the gas pipe 23, and the gas pipe 23 is plugged into the horizontal section of the connector 25, so as to realize the rapid installation and fixation of the gas pipe 23. The air pipe 24 is horizontally provided in the gas pipe 23, and passes through both ends of the gas pipe 23, and passes through the horizontal section of the connector 25 and then extends to the air outlet 12.

[0036] When the burner head 2 is working, the gas enters the end head 22 along the gas pipe 23, and at the same time, part of the air directly reaches the end head 22 along the air pipe 24, and the other part of the air reaches the end head 22 along the gap between the outer shell 21 and the gas pipe 23, thereby achieving full mixing and combustion of the gas and air, ensuring a stable supply of oxygen, ensuring full combustion of the gas, reducing waste of gas resources, and reducing pollution to the environment.

[0037] like Figure 4 As shown, the fan 1 includes a chassis 13, an impeller 14 and a motor 15. The chassis 13 is connected to the air outlet 12, and an inspection hole 16 is provided on the upper end surface of the chassis 13, and a cover plate 17 is provided on the inspection hole 16 to facilitate the maintenance of the components in the chassis 13. The impeller 14 is rotatably connected to the chassis 13, and the motor 15 is provided on the outer wall of the chassis 13 and is used to control the rotation of the impeller 14.

[0038] like Figure 4As shown, the impeller 14 includes a mounting plate 141, a support plate 142 and a plurality of blades 143. The mounting plate 141 is connected to the motor 15, and the support plate 142 is arranged parallel to the mounting plate 141 and is provided with a channel 144 connected to the air inlet pipe 4. The blades 143 are arranged between the mounting plate 141 and the support plate 142 in an arc shape and are distributed around the channel 144.

[0039] like Figure 4 As shown, the side wall of the air inlet duct 4 is provided with a sleeve 145 inserted into the chassis 13, and the support plate 142 is provided with an insert 146 embedded in the sleeve 145. The insert 146 is coaxially arranged with the channel 144, and an air intake gap is formed between the insert 146 and the sleeve 145.

[0040] When the fan 1 is working, the motor 15 drives the impeller 14 to work. At this time, most of the air directly enters between the mounting plate 141 and the support plate 142 along the channel 144, and is directly blown into the burner head 2 through the blades 143. Another part of the air enters into the burner head 2 along the air intake gap between the insert 146 and the sleeve 145, thereby realizing a stable air supply and ensuring the stable operation of the burner head 2.

[0041] The specific embodiments are merely explanations of the present invention and are not limitations of the present invention. After reading this specification, those skilled in the art may make modifications to the embodiments without any creative contribution as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

Claims

1. A burner for a gas boiler, characterized in that: include: A fan (1) having an air inlet (11) on its side wall and an air outlet (12) at its front end; A combustion head (2) connected to and arranged at the front end of the air outlet (12); A gas pipe (23) connected to the combustion head (2); An air inlet pipe (4) is arranged in communication with the air inlet (11) and has an open lower end; A first butterfly valve (5) is arranged at the opening position of the air inlet pipe (4); A return pipe (6) horizontally connected to the interior of the air inlet pipe (4); The second butterfly valve (7) is arranged in the return pipe (6).

2. A burner for a gas boiler according to claim 1, characterized in that: The outer wall of the return pipe (6) is provided with a scale plate (61), and the rotating shaft of the second butterfly valve (7) is provided with a pointer (71).

3. A burner for a gas boiler according to claim 1, characterized in that: The burner head (2) comprises an outer shell (21), an end head (22), a gas pipe (23), and an air pipe (24); the outer shell (21) is arranged at the position of the air outlet (12); the end head (22) is arranged at the end of the outer shell (21); the gas pipe (23) is connected to the end head (22), is horizontally arranged in the outer shell (21), and extends into the air outlet (12); the gas pipe (23) is connected to the gas pipe (23); and the air pipe (24) is horizontally arranged in the gas pipe (23), passes through both ends of the gas pipe (23), and extends into the air outlet (12).

4. A burner for a gas boiler according to claim 3, characterized in that: A right-angled connector (25) is arranged in the air outlet (12), the vertical section of the connector (25) is connected to the gas pipe (23), the gas pipe (23) is plugged into the horizontal section of the connector (25), and the air pipe (24) passes through the horizontal section of the connector (25).

5. A burner for a gas boiler according to claim 4, characterized in that: The fan (1) comprises a chassis (13), an impeller (14) and a motor (15); the chassis (13) is connected to the air outlet (12); the impeller (14) is rotatably connected inside the chassis (13); the motor (15) is used to control the rotation of the impeller (14); the impeller (14) comprises a mounting plate (141), a support plate (142) and a plurality of blades (143); the mounting plate (141) is connected to the motor (15); the support plate (142) is arranged parallel to the mounting plate (141) and is provided with a channel (144) connected to the air inlet pipe (4); the blades (143) are arranged in an arc shape between the mounting plate (141) and the support plate (142) and are distributed around the channel (144).

6. A burner for a gas boiler according to claim 5, characterized in that: The side wall of the air inlet pipe (4) is provided with a sleeve (145) inserted into the chassis (13); the support plate (142) is provided with an insert pipe (146) embedded in the sleeve pipe (145); the insert pipe (146) is coaxially arranged with the hole (144); an air intake gap is formed between the insert pipe (146) and the sleeve pipe (145).

7. A burner for a gas boiler according to claim 6, characterized in that: The upper end surface of the chassis (13) is provided with an inspection hole (16), and a cover plate (17) is provided on the inspection hole (16).

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