Multi-stage air distribution and oxygen supply decoupling combustion device

Abstract

The utility model discloses a multistage air distribution oxygen supply decoupling combustion device which comprises a pyrolysis chamber (2) and a combustion chamber (3), a main smoke pipe (5) is arranged outside a smoke outlet of the combustion chamber (3), a first branch smoke pipe (4) connected with an inlet of the pyrolysis chamber (2) and a second branch smoke pipe (7) connected with an air distribution mechanism (6) are arranged on the main smoke pipe (5), and an air mixer (9) is arranged at an air outlet of the air distribution mechanism (6). And a plurality of groups of air supply pipes (8) connected with different depth positions of the combustion chamber (3) are arranged on the rear side of the air mixer (9). Cold air and hot air can be mixed in the air distribution process, and the combustion effect is improved.

Description

Technical Field

[0001] The utility model relates to an air distribution and oxygen supply decoupling combustion device, in particular to a multi-stage air distribution and oxygen supply decoupling combustion device. Background Art

[0002] Decoupled combustion refers to dividing the fuel combustion process into two stages to achieve more efficient and cleaner energy conversion. The traditional combustion process is to mix fuel and oxygen together in a combustion chamber and ignite them. In this process, the fuel is directly burned in the combustion chamber to produce high-temperature and high-pressure combustion products. However, this direct combustion method has some problems, such as increased emissions of harmful gases such as nitrogen oxides (NOx), carbon dioxide (CO2) and particulate matter. Decoupled combustion separates the fuel and oxygen, pre-treats the fuel part under low-temperature conditions, and then mixes the pre-treated fuel with oxygen for combustion. This can reduce pollutant emissions and improve fuel utilization efficiency: decoupled combustion allows the fuel to be burned under more suitable conditions, improving fuel utilization efficiency. The pretreatment stage can convert some low-temperature combustible substances in the fuel into high-temperature combustible substances, making the combustion in the combustion chamber more complete and efficient. Providing a large amount of oxygen at one time during the combustion stage will lead to a large increase in NOx in the combustion products and increase the cost of exhaust gas treatment.

[0003] For example, the patent with application number 202221631835.3 discloses a garbage decoupled combustion furnace with low nitrogen oxide pollutants. The generation of nitrogen oxides is reduced through a primary air distribution device, a secondary air distribution device and a recycled flue gas air distribution device. However, through simple air distribution, uneven air temperature will affect the combustion effect. Utility Model Content

[0004] The purpose of the utility model is to provide a multi-stage air distribution and oxygen supply decoupling combustion device, which can mix cold and hot air during the air distribution process to improve the combustion effect.

[0005] The technical solution of the utility model is as follows: a multi-stage air distribution and oxygen supply decoupled combustion device, comprising a pyrolysis chamber and a combustion chamber, a main smoke pipe is arranged outside the smoke exhaust port of the combustion chamber, the main smoke pipe is provided with a first smoke pipe connected to the pyrolysis chamber inlet and a second smoke pipe connected to the air distribution mechanism, an air mixer is arranged at the air outlet of the air distribution mechanism, and a plurality of groups of air supply pipes connected to different depth positions of the combustion chamber are arranged on the rear side of the air mixer.

[0006] In the aforementioned multi-stage air distribution and oxygen supply decoupled combustion device, the air distribution mechanism includes an air distribution pipe connected to the air mixer, the air distribution pipe is provided with a first inlet connected to the second smoke pipe, a second inlet is provided on one side of the first inlet, and an external fan is provided on the front side of the second inlet.

[0007] In the aforementioned multi-stage air distribution and oxygen supply decoupled combustion device, the air mixer includes an air mixing pipe, a mounting frame is provided in the middle of the air mixing pipe, a fan is provided on the mounting frame, and spoiler pipes are provided on the front and rear sides of the fan.

[0008] In the aforementioned multi-stage air distribution and oxygen supply decoupled combustion device, a regulating valve is provided on the air supply pipe.

[0009] Compared with the prior art, the utility model utilizes the flue gas generated in the combustion chamber to dry and preheat the biomass material in the pyrolysis chamber, and the flue gas in the combustion chamber is proportionally regulated with the external air through an air distribution mechanism, and an air mixer is provided on the rear side of the air distribution mechanism. The cold and hot air coming out of the air distribution mechanism will hit the spoiler pipe to play a role of turbulent mixing, and the cold and hot air will drive the fan to rotate to achieve position adjustment, and then hit the spoiler pipe again to make the temperature uniform, and multiple air supply is carried out through the air supply pipe to reduce the generation of nitrogen oxides. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a structural schematic diagram of the utility model;

[0011] Figure 2 It is a structural schematic diagram of the air mixer and air distribution mechanism of the utility model.

[0012] The markings in the attached drawings are: 2-pyrolysis chamber, 3-combustion chamber, 4-first smoke pipe, 5-main smoke pipe, 6-air distribution mechanism, 7-second smoke pipe, 8-air supply pipe, 9-air mixer, 10-air distribution pipe, 11-first inlet, 12-second inlet, 13-external fan, 14-air mixing pipe, 15-mounting frame, 16-fan, 17-spoiler pipe, 18-regulating valve. DETAILED DESCRIPTION

[0013] The present invention is further described below in conjunction with the accompanying drawings and embodiments, but they are not intended to limit the present invention.

[0014] Example 1. A multi-stage air distribution oxygen decoupling combustion device, comprising: Figure 1-2 As shown, it includes a pyrolysis chamber 2 and a combustion chamber 3. A main smoke pipe 5 is provided outside the smoke exhaust port of the combustion chamber 3. The main smoke pipe 5 is provided with a first smoke pipe 4 connected to the inlet of the pyrolysis chamber 2 and a second smoke pipe 7 connected to an air distribution mechanism 6. An air mixer 9 is provided at the air outlet of the air distribution mechanism 6. A plurality of air supply pipes 8 connected to different depth positions of the combustion chamber 3 are provided at the rear side of the air mixer 9.

[0015] The air distribution mechanism 6 includes an air distribution pipe 10 connected to the air mixer 9. The air distribution pipe 10 is provided with a first inlet 11 connected to the second smoke pipe 7. A second inlet 12 is provided on one side of the first inlet 11. An external fan 13 is provided in front of the second inlet 12.

[0016] The air mixer 9 comprises an air mixing pipe 14 , a mounting frame 15 is provided in the middle of the air mixing pipe 14 , a fan 16 is provided on the mounting frame 15 , and spoiler pipes 17 are provided at the front and rear sides of the fan 16 .

[0017] The air supply pipe 8 is provided with a regulating valve 18 .

[0018] Principle of the utility model: The utility model is mainly used for the incineration of biomass materials. Due to the water content and other problems, the biomass materials will lead to low combustion efficiency and are prone to produce black smoke and other substances due to incomplete combustion. The utility model dries and preheats the materials in the pyrolysis chamber 2 through the flue gas generated by the combustion chamber 3 to provide energy utilization. The combustion chamber 3 adopts a multi-stage air distribution form to provide flue gas to prevent the flue gas content from being too high, which increases the production of nitrogen oxides. The first inlet 11 of the air distribution mechanism 6 is connected to the second smoke pipe 7, and the second inlet 12 is connected to the external fan 13. The external fan 13 provides the oxygen component required for the combustion of the combustion chamber. The flue gas and the external air can be transported to the air mixer 9 through the air distribution mechanism 6. The high-temperature flue gas and the external air will hit the spoiler 17 to mix the gas. Then the high-temperature flue gas and the external air will drive the fan to rotate, so that the high-temperature flue gas and the external air are further mixed and the position changes, and then hit the spoiler 17 again, so that the temperature of the gas sent to the combustion chamber 3 is more uniform and the combustion effect is better. The regulating valve 18 can adjust the oxygen content sent to different positions of the combustion chamber to fully burn the material.

Claims

1. A multi-stage air distribution oxygen decoupling combustion device, characterized in that: The invention comprises a pyrolysis chamber (2) and a combustion chamber (3); a main smoke pipe (5) is arranged outside the smoke exhaust port of the combustion chamber (3); a first smoke pipe (4) connected to the inlet of the pyrolysis chamber (2) and a second smoke pipe (7) connected to an air distribution mechanism (6) are arranged on the main smoke pipe (5); an air mixer (9) is arranged at the air outlet of the air distribution mechanism (6); and a plurality of groups of air supply pipes (8) connected to positions at different depths of the combustion chamber (3) are arranged at the rear side of the air mixer (9).

2. A multi-stage air distribution oxygen supply decoupled combustion device according to claim 1, characterized in that: The air distribution mechanism (6) comprises an air distribution pipe (10) connected to the air mixer (9), the air distribution pipe (10) is provided with a first inlet (11) connected to the second smoke pipe (7), a second inlet (12) is provided on one side of the first inlet (11), and an external fan (13) is provided on the front side of the second inlet (12).

3. A multi-stage air distribution oxygen supply decoupled combustion device according to claim 1, characterized in that: The air mixer (9) comprises an air mixing pipe (14), a mounting frame (15) is provided in the middle of the air mixing pipe (14), a fan (16) is provided on the mounting frame (15), and spoiler pipes (17) are provided on both sides of the fan (16).

4. A multi-stage air distribution oxygen supply decoupled combustion device according to claim 1, characterized in that: The air supply pipe (8) is provided with a regulating valve (18).

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