Biomass fuel burner

Abstract

The present invention provides a biomass fuel burner, which mainly relates to the field of burners. A biomass fuel burner includes a filter chamber, a pressure chamber, a mixing channel and a combustion chamber. The filter chamber includes a front chamber, a middle chamber and a rear chamber. A front partition is arranged between the front chamber and the middle chamber, and a rear partition is arranged between the middle chamber and the rear chamber. An air intake pipe is arranged on one side of the front chamber, and a connecting pipe is arranged on one side of the rear chamber. The pressure chamber includes an installation chamber and a mixing chamber connected in a front-to-back state. An air duct is arranged on the top of the mixing chamber, and an air pump is connected to the end of the air duct. A first solenoid valve is arranged in the installation chamber, a second solenoid valve is arranged on the air duct, and a third solenoid valve is arranged at the end of the mixing chamber. The beneficial effects of the present invention are: the present invention can solve the problems of deflagration and blockage caused by the mixing of carbon powder in the fuel gas, and at the same time avoid the flashback phenomenon caused by the change of the fuel gas supply pressure, thereby improving the combustion state of the burner and increasing the service life of the equipment.

Description

Technical Field

[0001] The invention mainly relates to the field of burners, in particular to a biomass fuel burner. Background Art

[0002] Agricultural and forestry waste is used as raw materials, and after crushing, mixing, extruding, drying and other processes, it is made into various shapes (such as blocks, granules, etc.) and clean fuels that can be directly burned. This kind of pigment is biomass fuel. Biomass fuel is produced by gas-carbon cogeneration in a biomass boiler to produce carbon powder and gas. The gas is transported into the burner through a pipeline and can be mixed with air to be ignited as a clean energy source. When the current burner is in use, the carbon powder mixed in the gas is prone to deflagration, and it is also easy to clog the burner and reduce the service life of the equipment. In addition, the gas supply often causes flashback due to changes in supply pressure. Summary of the invention

[0003] In order to solve the deficiencies of the prior art, the present invention provides a biomass fuel burner, which can solve the problems of deflagration and blockage caused by carbon powder mixed in the fuel gas, while avoiding the flashback phenomenon caused by changes in the gas supply pressure, thereby improving the combustion state of the burner and increasing the service life of the equipment.

[0004] In order to achieve the above object, the present invention is implemented through the following technical solutions:

[0005] A biomass fuel burner comprises a filter chamber, a pressure chamber, a mixing channel and a combustion chamber, wherein the filter chamber comprises a front chamber, a middle chamber and a rear chamber, a front partition is arranged between the front chamber and the middle chamber, a plurality of first channels connecting the front chamber and the middle chamber are arranged on the front partition, a rear partition is arranged between the middle chamber and the rear chamber, a plurality of second channels connecting the middle chamber and the rear chamber are arranged on the rear partition, any one of the first channels is not coaxial with any one of the second channels, an air intake pipe is arranged on one side of the front chamber, and a connecting pipe is arranged on one side of the rear chamber; the pressure chamber comprises an installation chamber and a mixing chamber connected in a front-to-back state, the connecting pipe is connected to the installation chamber, an air duct is arranged on the top of the mixing chamber, an air pump is connected to the end of the air duct, the mixing chamber is connected to the mixing channel, a first solenoid valve is arranged in the installation chamber, a second solenoid valve is arranged on the air duct, a third solenoid valve is arranged at the end of the mixing chamber, the mixing channel is a reducing pipe, the end of the mixing channel is connected to the combustion chamber, and an igniter is arranged in the combustion chamber.

[0006] The front partition and the rear partition are both detachable.

[0007] A plurality of baffles are arranged in the mixing channel, and a plurality of through holes are formed on the baffles.

[0008] A biomass fuel burner also includes a controller. A pressure sensor is arranged in the mixing chamber. The first solenoid valve, the second solenoid valve, the third solenoid valve and the pressure sensor are all electrically connected to the controller.

[0009] Compared with the prior art, the beneficial effects of the present invention are:

[0010] The present invention filters the fuel gas by means of a double partition. By means of the non-corresponding arrangement of the first channel and the second channel, when the airflow passes through the obstructions of the front partition and the rear partition in sequence, the carbon powder in the airflow cannot follow the change of direction of the airflow and is retained in the front chamber and the middle chamber, thereby reducing the carbon powder content in the fuel gas and preventing the carbon powder from deflagration when the fuel gas is burned. At the same time, the accumulation of carbon powder and ash in the burner delivery pipeline can be reduced to avoid blockage of the pipeline.

[0011] The device realizes premixing of gas and air in a mixing chamber through the cooperation of the first solenoid valve, the second solenoid valve and the third solenoid valve, and can create a high-pressure environment in the mixing chamber, thereby preventing backfire during gas combustion.

[0012] The device can fully mix the air and fuel gas mixed in the mixing chamber by adding a mixing channel between the mixing chamber and the combustion chamber, thereby improving the combustion effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Attached Figure 1 It is a schematic diagram of the structure of the present invention;

[0014] Attached Figure 2 It is a schematic diagram of the cross-sectional structure of the filter chamber of the present invention;

[0015] Attached Figure 3 It is a schematic diagram of the partition arrangement structure of the present invention;

[0016] Attached Figure 4 It is a schematic diagram of the partially enlarged structure of part A of the present invention.

[0017] Numbers shown in the accompanying drawings: 1. filter chamber; 2. pressure chamber; 3. mixing channel; 4. combustion chamber; 11. front chamber; 12. middle chamber; 13. rear chamber; 14. front partition; 15. first channel; 16. rear partition; 17. second channel; 18. air intake pipe; 19. connecting pipe; 21. installation chamber; 22. mixing chamber; 23. air duct; 24. air pump; 25. first solenoid valve; 26. second solenoid valve; 27. third solenoid valve; 31. baffle; 41. igniter. DETAILED DESCRIPTION

[0018] The present invention will be further described with reference to the accompanying drawings and specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art may make various changes or modifications to the present invention, and these equivalent forms also fall within the scope limited by the application.

[0019] like Figure 1-4 As shown, the biomass fuel burner of the present invention comprises a filter chamber 1, a pressure chamber 2, a mixing channel 3 and a combustion chamber 4 connected in sequence. When the gas is delivered, it is first filtered by the filter chamber 1, and the gas is premixed with the air in the pressure chamber 2 to form a high-pressure environment. Then, the mixed gas and air in the pressure chamber 2 are fully mixed through the mixing channel 3, so that they are ignited in the combustion chamber 4 and fully burned.

[0020] Specifically, the filter chamber 1 includes a front chamber 11, a middle chamber 12 and a rear chamber 13, a front partition 14 can be detachably installed between the front chamber 11 and the middle chamber 12, a plurality of first channels 15 connecting the front chamber 11 and the middle chamber 12 are provided on the front partition 14, a rear partition 16 can be detachably installed between the middle chamber 12 and the rear chamber 13, a plurality of second channels 17 connecting the middle chamber 12 and the rear chamber 13 are provided on the rear partition 16, and any one of the first channels 15 is not coaxial with any one of the second channels 17. The detachable front partition 14 and rear partition 16 can facilitate subsequent cleaning and prevent excessive accumulation of carbon powder from affecting use. By setting the first channel 15 and the second channel 17, the gas can change its route frequently when passing through the front partition 14 and the rear partition 16, so that the carbon powder entrained in the gas is blocked by the partition and falls into the bottom of the filter chamber 1, thereby filtering the carbon powder in the gas to reduce the carbon powder content in the gas, prevent the gas from deflagration during combustion, and reduce the accumulation of carbon powder or ash in the burner pipeline to cause blockage.

[0021] Furthermore, an air inlet pipe 18 is connected to one side of the front chamber 11, and the air inlet pipe 18 is connected to the air outlet of the biomass fuel gas-charcoal cogeneration furnace to guide the produced gas to the device. A connecting pipe 19 is connected to one side of the rear chamber 13. The pressure chamber 2 includes an installation chamber 21 and a mixing chamber 22 connected in a front-to-back state, and the connecting pipe 19 is connected to the installation chamber 21. The installation chamber 21 serves as a buffer between the connecting pipe 19 and the mixing chamber 22, and a first solenoid valve 25 is installed therein. The top of the mixing chamber 22 is connected to an air duct 23, and the end of the air duct 23 is connected to an air pump 24. The air pump 24 can pump high-pressure air into the mixing chamber 22 through the air duct 23, causing high pressure in the mixing chamber 22, and at the same time fully mixing the combustion-supporting air and the gas. A second solenoid valve 26 is installed on the air duct 23, and a third solenoid valve 27 is installed at the end of the mixing chamber 22. In normal use, first, the first solenoid valve 25 is opened, the second solenoid valve 26 and the third solenoid valve 27 are closed, and the gas is introduced into the mixing chamber 22 through the connecting pipe 19. At this time, the gas fills the mixing chamber 22 and generates a small pressure. Then the first solenoid valve 25 is closed, and only the second solenoid valve 26 is opened. The air pump pumps combustion-supporting air into the mixing chamber 22 and generates high pressure in the mixing chamber 22. Then the second solenoid valve 26 is closed, and the third solenoid valve 27 is opened. Under pressure, the mixed gas in the mixing chamber 22 is quickly mixed through the mixing channel 3 and enters the combustion chamber to be ignited, thereby fully burning. Finally, the third solenoid valve 26 is closed one to two seconds after the first solenoid valve 25 is opened, and the gas continues to be introduced into the mixing chamber 22 through the connecting pipe 19 to complete the next mixed combustion process. Among them, the actions of each solenoid valve are controlled by the single-chip microcomputer controller. The deflation operation of opening the third solenoid valve 27 can be controlled by a set time or a set pressure. Therefore, a pressure sensor can be added to the mixing chamber 22. When the pressure value detected by the pressure sensor reaches a certain level, the controller controls the second solenoid valve 26 to close and the third solenoid valve 27 to open for deflation. When the pressure value in the mixing chamber 22 reaches the lower limit, the first solenoid valve 25 opens and the third solenoid valve 27 closes.

[0022] Specifically, the mixing chamber 22 is connected to the mixing channel 3, and the mixing channel 3 is a reducing pipe. The diameter of the mixing channel 3 gradually decreases from the mixing chamber 22 to one end of the combustion chamber 4, so that the flow rate of the airflow can be increased. By changing the flow rate of the mixed gas, the gas can be gradually mixed, thereby improving its combustion effect in the combustion chamber. The end of the mixing channel 3 is connected to the combustion chamber 4, and an igniter 41 is installed in the combustion chamber 4. The igniter 41 is an electric spark igniter, which can ignite the mixed gas entering in batches to ensure the full combustion of the gas.

[0023] Furthermore, a plurality of baffles 31 are welded in the mixing channel 3, and a plurality of through holes are provided on the baffles 31. Through the arrangement of the baffles 31 and the through holes, the mixed gas can be dispersed and reassembled for multiple times, so that it can be fully mixed and its combustion effect can be improved.

Claims

1. A biomass fuel burner, comprising a filter chamber (1), a pressure chamber (2), a mixing channel (3) and a combustion chamber (4), characterized in that: The filter chamber (1) comprises a front chamber (11), a middle chamber (12) and a rear chamber (13); a front partition (14) is arranged between the front chamber (11) and the middle chamber (12); a plurality of first channels (15) connecting the front chamber (11) and the middle chamber (12) are arranged on the front partition (14); a rear partition (16) is arranged between the middle chamber (12) and the rear chamber (13); a plurality of second channels (17) connecting the middle chamber (12) and the rear chamber (13) are arranged on the rear partition (16); any one of the first channels (15) and any one of the second channels (17) are not coaxial; an air intake pipe (18) is arranged on one side of the front chamber (11); and a connecting pipe (19) is arranged on one side of the rear chamber (13); The pressure chamber (2) comprises a mounting chamber (21) and a mixing chamber (22) connected in a front-to-back state, the connecting pipe (19) is connected to the mounting chamber (21), an air duct (23) is arranged at the top of the mixing chamber (22), the end of the air duct (23) is connected to an air pump (24), the mixing chamber (22) is connected to a mixing channel (3), a first solenoid valve (25) is arranged in the mounting chamber (21), a second solenoid valve (26) is arranged on the air duct (23), a third solenoid valve (27) is arranged at the end of the mixing chamber (22), the mixing channel (3) is a reducing pipe, the end of the mixing channel (3) is connected to a combustion chamber (4), and an igniter (41) is arranged in the combustion chamber (4); The front partition (14) and the rear partition (16) are both detachable; A plurality of baffles (31) are arranged in the mixing channel (3), and a plurality of through holes are provided on the baffles (31); It also includes a controller. A pressure sensor is arranged in the mixing chamber (22). The first solenoid valve (25), the second solenoid valve (26), the third solenoid valve (27) and the pressure sensor are all electrically connected to the controller.

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