Fuel oil and gas boiler for premixed combustion

Abstract

The utility model provides a premixed combustion fuel oil gas boiler which comprises a boiler body, a full-premixed combustor is installed on one side of the boiler body, an air conveying pipe is vertically arranged on the surface of the top of the full-premixed combustor in a penetrating mode, a suction fan is installed at the top end of the air conveying pipe, a smoke exhaust pipe is installed at the top end of the boiler body, and the smoke exhaust pipe is communicated with the full-premixed combustor. A drainage pipe is arranged at one end of the smoke exhaust pipe, and the outer side surface of the air conveying pipe is sleeved with an outer snakelike heat exchange pipe. The connecting pipe, the first electromagnetic valve and the second electromagnetic valve are arranged and used in cooperation, after the boiler body is used at a time, the first electromagnetic valve is closed, the second electromagnetic valve is opened, and then an external water source enters the drainage pipe through the connecting pipe and then flows into the inner S-shaped heat exchange pipe and the outer S-shaped heat exchange pipe; according to the mode, operation is easy, and the subsequent heat exchange efficiency of the inner snake-shaped heat exchange pipe and the subsequent heat exchange efficiency of the outer snake-shaped heat exchange pipe are guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of boilers, in particular to a premixed combustion oil and gas boiler. Background Art

[0002] A fully premixed condensing boiler is also known as an air / gas premixed condensing boiler. During the boiler combustion process, in order to improve the completeness of gas combustion, the air and gas need to be mixed first. In order to improve the combustion efficiency of the boiler, the air is usually preheated before being introduced into the boiler. During the preheating process of the air, an air preheater is required.

[0003] Most of the existing preheaters used for air preheating use electricity to preheat the air, and the flue gas discharged by the boiler is mostly wasted, which results in unreasonable utilization of energy.

[0004] Therefore, it is necessary to provide a premixed combustion fuel gas boiler to solve the above technical problems. Utility Model Content

[0005] The utility model provides a premixed combustion oil and gas boiler, which solves the problems in the background technology.

[0006] In order to solve the above technical problems, the utility model provides a premixed combustion oil and gas boiler, including a boiler body, a full premixed burner is installed on one side of the boiler body, an air delivery pipe is vertically penetrated on the top surface of the full premixed burner, a suction fan is installed on the top of the air delivery pipe, a smoke exhaust pipe is installed on the top of the boiler body, a drainage pipe is provided at one end of the smoke exhaust pipe, an outer serpentine heat exchange pipe is sleeved on the outer surface of the air delivery pipe, an inner serpentine heat exchange pipe is provided inside the air delivery pipe, one end of the inner serpentine heat exchange pipe and the outer serpentine heat exchange pipe are both connected with the drainage pipe, and the other ends of the inner serpentine heat exchange pipe and the outer serpentine heat exchange pipe are connected with an air outlet pipe.

[0007] Preferably, a connecting pipe is provided on the top surface of the smoke exhaust pipe opposite to the drainage pipe, a second solenoid valve is installed on the outer surface of the connecting pipe, and a first solenoid valve is installed on the surface of the smoke exhaust pipe.

[0008] Preferably, the outer side of the outer serpentine heat exchange tube is sheathed with a thermal insulation sleeve.

[0009] Preferably, one end of the full premix burner is connected to a gas delivery pipe, and one end of the full premix burner is connected to a combustion chamber inside the boiler body.

[0010] Preferably, a sealing gasket is provided at the contact point between the inner serpentine heat exchange tube and the air delivery pipe.

[0011] Preferably, a filter is provided at the air inlet end of the suction fan.

[0012] Preferably, a controller is installed on the outer surface of the boiler body.

[0013] Compared with related technologies, the premixed combustion oil and gas boiler provided by the present invention has the following beneficial effects:

[0014] 1. Compared with the existing technology, this kind of premixed combustion oil and gas boiler, by setting the drainage pipe, inner serpentine heat exchange pipe, outer serpentine heat exchange pipe and insulation sleeve in combination, makes it possible for the flue gas generated to flow into the drainage pipe through the exhaust pipe when the boiler body is working, and then under the guidance of the drainage pipe, the flue gas enters the outer serpentine heat exchange pipe and the inner serpentine heat exchange pipe respectively, and then the outer serpentine heat exchange pipe preheats the air delivery pipe from the outside to the inside, while the inner serpentine heat exchange pipe heats the air delivery pipe from the inside to the outside. This method is simple to operate and is convenient for the flue gas to heat the air delivery pipe. The internal air is evenly preheated to improve energy utilization. By setting the connecting pipe, the first solenoid valve and the second solenoid valve for coordinated use, it is convenient to close the first solenoid valve and open the second solenoid valve after the boiler body is used once. Then, the external water source enters the drainage pipe through the connecting pipe, and then flows into the inner serpentine heat exchange tube and the outer serpentine heat exchange tube, thereby washing away the dust adsorbed on the inner walls of the inner serpentine heat exchange tube and the outer serpentine heat exchange tube. This method is simple to operate and ensures the subsequent heat exchange efficiency of the inner serpentine heat exchange tube and the outer serpentine heat exchange tube. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a structural diagram of a premixed combustion oil and gas boiler provided by the utility model;

[0016] Figure 2 This is a front view of a premixed combustion oil and gas boiler provided by the utility model;

[0017] Figure 3 This is a schematic diagram of the internal structure of an air delivery pipe of a premixed combustion oil and gas boiler provided by the utility model;

[0018] Figure 4 The utility model provides a schematic diagram of the filter structure of a premixed combustion oil and gas boiler.

[0019] Numbers in the figure:

[0020] 1. Boiler body; 2. Smoke exhaust pipe; 3. Suction fan; 4. Insulation sleeve; 5. Air delivery pipe; 6. Full premix burner; 7. Gas delivery pipe; 8. Combustion chamber; 9. Controller; 10. Outer serpentine heat exchange tube; 11. Exhaust pipe; 12. Inner serpentine heat exchange tube; 13. Drain pipe; 14. First solenoid valve; 15. Connecting pipe; 16. Second solenoid valve; 17. Filter. DETAILED DESCRIPTION

[0021] The present invention will be further described below with reference to the accompanying drawings and implementation examples.

[0022] First embodiment

[0023] Please refer to Figure 1-4 A premixed combustion oil and gas boiler comprises a boiler body 1, a fully premixed burner 6 is mounted on one side of the boiler body 1, an air delivery pipe 5 is vertically passed through the top surface of the fully premixed burner 6, a suction fan 3 is mounted on the top of the air delivery pipe 5, a smoke exhaust pipe 2 is mounted on the top of the boiler body 1, a drainage pipe 13 is mounted on one end of the smoke exhaust pipe 2, an outer serpentine heat exchange pipe 10 is sleeved on the outer surface of the air delivery pipe 5, an inner serpentine heat exchange pipe 12 is mounted inside the air delivery pipe 5, one end of the inner serpentine heat exchange pipe 12 and the outer serpentine heat exchange pipe 10 are both connected to the drainage pipe 13, and the other ends of the inner serpentine heat exchange pipe 12 and the outer serpentine heat exchange pipe 10 are connected to the outlet pipe 11.

[0024] By arranging the drainage pipe 13, the inner serpentine heat exchange tube 12, the outer serpentine heat exchange tube 10, and the insulation sleeve 4 for coordinated use, when the boiler body 1 is working, the flue gas generated flows into the drainage pipe 13 through the smoke exhaust pipe 2, and then, under the guidance of the drainage pipe 13, the flue gas enters the outer serpentine heat exchange tube 10 and the inner serpentine heat exchange tube 12 respectively. Thereafter, the outer serpentine heat exchange tube 10 preheats the air delivery tube 5 from the outside to the inside, while the inner serpentine heat exchange tube 12 heats the air delivery tube 5 from the inside to the outside. This method is simple to operate and is convenient for uniformly preheating the air inside the air delivery tube 5 through the flue gas, thereby improving energy utilization.

[0025] The working principle of the premixed combustion oil and gas boiler provided by the utility model is as follows:

[0026] In this type of premixed combustion oil and gas boiler, when the boiler body 1 is working, the flue gas generated flows into the drainage pipe 13 through the flue gas exhaust pipe 2, and then under the guidance of the drainage pipe 13, the flue gas enters the outer serpentine heat exchange tube 10 and the inner serpentine heat exchange tube 12 respectively. After that, the outer serpentine heat exchange tube 10 preheats the air delivery pipe 5 from the outside to the inside, while the inner serpentine heat exchange tube 12 heats the air delivery pipe 5 from the inside to the outside. This method is simple to operate and is convenient for uniformly preheating the air inside the air delivery pipe 5 through the flue gas, so as to improve energy utilization. The connecting pipe 15, the first solenoid valve 14, and the second solenoid valve 16 are arranged for coordinated use, so that after the boiler body 1 is used once, the first solenoid valve 14 is closed and the second solenoid valve 16 is opened, and then the external water source enters the drainage pipe 13 through the connecting pipe 15, and then flows into the inner serpentine heat exchange tube 12 and the outer serpentine heat exchange tube 10, thereby washing away the dust adsorbed on the inner walls of the inner serpentine heat exchange tube 12 and the outer serpentine heat exchange tube 10. This method is simple to operate and ensures the subsequent heat exchange efficiency of the inner serpentine heat exchange tube 12 and the outer serpentine heat exchange tube 10.

[0027] Compared with related technologies, the premixed combustion oil and gas boiler provided by the present invention has the following beneficial effects:

[0028] This premixed combustion oil and gas boiler is used in conjunction with the provision of a guide tube 13, an inner serpentine heat exchange tube 12, an outer serpentine heat exchange tube 10, and an insulation sleeve 4. When the boiler body 1 is working, the flue gas generated flows into the guide tube 13 through the exhaust pipe 2. Then, under the guidance of the guide tube 13, the flue gas enters the outer serpentine heat exchange tube 10 and the inner serpentine heat exchange tube 12 respectively. After that, the outer serpentine heat exchange tube 10 preheats the air delivery tube 5 from the outside to the inside, while the inner serpentine heat exchange tube 12 preheats the air delivery tube 5 from the inside to the outside. This method is simple to operate and is convenient for heating the air inside the air delivery tube 5 through the flue gas. Uniform preheating treatment is convenient for improving energy utilization. By setting up the coordinated use of the connecting pipe 15, the first solenoid valve 14, and the second solenoid valve 16, it is convenient to close the first solenoid valve 14 and open the second solenoid valve 16 after the boiler body 1 is used once. Then, the external water source enters the drainage pipe 13 through the connecting pipe 15, and then flows into the inner serpentine heat exchange tube 12 and the outer serpentine heat exchange tube 10, thereby washing away the dust adsorbed on the inner walls of the inner serpentine heat exchange tube 12 and the outer serpentine heat exchange tube 10. This method is simple to operate and ensures the subsequent heat exchange efficiency of the inner serpentine heat exchange tube 12 and the outer serpentine heat exchange tube 10.

[0029] Second embodiment

[0030] Please refer to Figure 1-4Based on the premixed combustion oil-gas boiler provided in the first embodiment of this application, the second embodiment of this application provides another premixed combustion oil-gas boiler. The second embodiment is merely a preferred embodiment of the first embodiment, and the implementation of the second embodiment will not affect the independent implementation of the first embodiment.

[0031] Specifically, the difference of the premixed combustion oil and gas boiler provided in the second embodiment of the present application is that a connecting pipe 15 is provided on the top surface of the smoke exhaust pipe 2 opposite to the drainage pipe 13, and a second solenoid valve 16 is installed on the outer surface of the connecting pipe 15, and a first solenoid valve 14 is installed on the surface of the smoke exhaust pipe 2. By setting the connecting pipe 15, the first solenoid valve 14 and the second solenoid valve 16 for coordinated use, it is convenient to close the first solenoid valve 14 and open the second solenoid valve 16 after the boiler body 1 is used once, and then allow the external water source to enter the drainage pipe 13 through the connecting pipe 15, and then flow into the inner serpentine heat exchange tube 12 and the outer serpentine heat exchange tube 10, thereby washing away the dust adsorbed on the inner walls of the inner serpentine heat exchange tube 12 and the outer serpentine heat exchange tube 10. This method is simple to operate and ensures the subsequent heat exchange efficiency of the inner serpentine heat exchange tube 12 and the outer serpentine heat exchange tube 10.

[0032] With this technical solution, the outer side of the outer serpentine heat exchange tube 10 is sheathed with a heat-insulating sleeve 4 . The heat-insulating sleeve 4 is provided to facilitate heat preservation of the outer serpentine heat exchange tube 10 .

[0033] With this technical solution, one end of the full premix burner 6 is connected to a gas delivery pipe 7 , and one end of the full premix burner 6 is connected to a combustion chamber 8 inside the boiler body 1 .

[0034] With this technical solution, a sealing gasket is provided at the contact point between the inner serpentine heat exchange tube 12 and the air delivery tube 5 . By providing the sealing gasket, the sealing performance of the contact point between the inner serpentine heat exchange tube 12 and the air delivery tube 5 is improved.

[0035] With this technical solution, a filter 17 is provided at the air inlet end of the suction fan 3. By providing the filter 17, dust and impurities in the gas entering the air delivery pipe 5 can be filtered, thereby facilitating the subsequent mixing and full combustion of the gas.

[0036] With this technical solution, a controller 9 is installed on the outer surface of the boiler body 1. By setting up the controller 9, it is convenient to control the electrical components inside the boiler body 1. The control circuit of the controller 9 can be realized by simple programming by technicians in this field. It is common knowledge in this field and is only used without modification. Therefore, the control method and circuit connection will not be described in detail.

[0037] It should be noted that all types of components used in this application document are standard parts and can be purchased on the market. The specific connection methods of each part adopt conventional means such as mature bolts, rivets and welding in the existing technology. The machinery, parts and electrical equipment all adopt conventional models in the existing technology. The circuit connection adopts the conventional connection method in the existing technology. The electrical equipment is connected to the external safe power supply, and no further detailed description is given here.

[0038] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A premixed combustion oil and gas boiler, comprising a boiler body (1), characterized in that: A full premix burner (6) is installed on one side of the boiler body (1), an air delivery pipe (5) is vertically provided on the top surface of the full premix burner (6), a suction fan (3) is installed on the top of the air delivery pipe (5), a smoke exhaust pipe (2) is installed on the top of the boiler body (1), a drainage pipe (13) is provided at one end of the smoke exhaust pipe (2), an outer serpentine heat exchange pipe (10) is sleeved on the outer surface of the air delivery pipe (5), an inner serpentine heat exchange pipe (12) is provided inside the air delivery pipe (5), one end of the inner serpentine heat exchange pipe (12) and the outer serpentine heat exchange pipe (10) are both connected to the drainage pipe (13), and the other ends of the inner serpentine heat exchange pipe (12) and the outer serpentine heat exchange pipe (10) are connected to the outlet pipe (11).

2. A premixed combustion oil and gas boiler according to claim 1, characterized in that: A connecting pipe (15) is provided on the top surface of the smoke exhaust pipe (2) opposite to the drainage pipe (13), a second solenoid valve (16) is installed on the outer surface of the connecting pipe (15), and a first solenoid valve (14) is installed on the surface of the smoke exhaust pipe (2).

3. The premixed combustion oil and gas boiler according to claim 1, characterized in that: The outer side of the outer serpentine heat exchange tube (10) is sleeved with a heat insulation sleeve (4).

4. The premixed combustion oil and gas boiler according to claim 1, characterized in that: One end of the full premix burner (6) is connected to a gas delivery pipe (7), and one end of the full premix burner (6) is connected to a combustion chamber (8) inside the boiler body (1).

5. The premixed combustion oil and gas boiler according to claim 1, characterized in that: A sealing gasket is provided at the contact point between the inner serpentine heat exchange tube (12) and the air delivery tube (5).

6. The premixed combustion oil and gas boiler according to claim 1, characterized in that: The air inlet end of the suction fan (3) is provided with a filter screen (17).

7. The premixed combustion oil and gas boiler according to claim 1, characterized in that: A controller (9) is installed on the outer surface of the boiler body (1).

Images