Novel flameless combustion device

Abstract

The utility model relates to the field of combustion devices, in particular to a novel flameless combustion device. The technical problems that in the using process, NOx emission is high in fuel gas combustion, certain limitation exists, safety is lowered, and environment quality is affected are solved. According to the technical scheme, the novel flameless combustion device comprises a combustion main body, a first gas distribution plate is installed at the lower end in the combustion body, a second gas distribution plate is arranged in the middle of the top of the first gas distribution plate, and four groups of long gas distribution pipes are connected to the outer side wall of the second gas distribution plate at equal intervals. By arranging the radiation type fuel nozzles, the combustion-supporting air dispersion chamber and the combustion balls, the fuel nozzles are evenly distributed at the bottom of the combustion chamber, the direction of the nozzles is perpendicular to the direction of the combustion cylinder, and the direction of combustion-supporting air is perpendicular to the direction of the fuel nozzles, shearing force is formed, fuel is fully mixed, the fuel combusts on the surfaces of the aluminum oxide combustion balls, and the combustion surface is large. And the combustion ball can be repeatedly used, so that the service life of the combustion ball is greatly prolonged.

Description

Technical Field

[0001] The utility model relates to the field of combustion devices, in particular to a novel flameless combustion device. Background Art

[0002] A flameless combustion device generally refers to a device that can realize the combustion process without producing obvious flames. The design purpose of this device is usually to reduce or eliminate the open flame and heat radiation generated in traditional flame combustion devices to provide a safer and more environmentally friendly combustion solution. However, existing combustion devices mostly use traditional forced air supply and diffusion combustion methods. The main purpose of this type of combustion device is safe combustion, and few corresponding measures are taken for NOx emissions. Nowadays, for the environmental protection requirements of NOx emissions below 30mg / m3 in some areas, the main technical routes that have emerged and been adopted include dispersed combustion, premixed combustion, flue gas recirculation, porous medium catalytic combustion and flameless combustion. In order to solve the problem of high NOx emissions from gas combustion, a flameless burner is designed, and NOx emissions meet the low emission requirements without the limitations of fuel dispersed combustion or air dispersed combustion, premixed combustion technology, external flue gas recirculation and internal flue gas recirculation technology, porous medium catalytic combustion, and flameless combustion, which reduce safety and affect environmental quality. Utility Model Content

[0003] In order to overcome the problem of high NOx emissions from gas combustion during the use of the combustion device, there are certain limitations, which reduce safety and affect environmental quality.

[0004] The technical solution of the utility model is: a novel flameless combustion device, comprising a combustion body; a first air distribution plate is installed at the lower end of the interior of the combustion body, a second air distribution plate is arranged at the center of the top of the first air distribution plate, four groups of long air distribution tubes are connected to the outer wall of the second air distribution plate at equal distances, short air distribution tubes are arranged on the outer wall of the second air distribution plate and between two adjacent groups of long air distribution tubes, air distribution tube end plates are arranged at the outer ends of the long air distribution tubes and the short air distribution tubes, and an air intake end cover is installed at the lower end of the second air distribution plate.

[0005] Preferably, by arranging a radial fuel nozzle, a combustion air dispersion chamber, and a combustion ball, the fuel nozzles are evenly distributed at the bottom of the combustion chamber, the direction of the nozzle is perpendicular to the direction of the combustion tube, the direction of the combustion air is perpendicular to the direction of the fuel nozzle, so as to form a shear force, fully mix the fuel, and burn on the surface of the alumina combustion ball. The combustion surface is large and is not affected by shape changes. The combustion ball can be used repeatedly, greatly improving the service life.

[0006] Preferably, a combustion-supporting air dispersion chamber is provided inside the combustion body to control the mixing ratio of fuel and oxygen and the combustion process and promote the full mixing of fuel and oxygen.

[0007] Preferably, an air pipe is connected to the bottom rear end of the combustion body by welding to ensure sufficient oxygen supply to support the combustion process. Oxygen can be provided by an external air pump or oxygen cylinder.

[0008] Preferably, the top front end of the combustion body is connected to a gas connecting pipe by welding, and a fuel suitable for flameless combustion is selected, such as liquid fuel (acetone, methanol, etc.) or gas fuel (natural gas, propane, etc.), which has the characteristics of high calorific value and easy storage and transportation, and is more convenient to use.

[0009] Preferably, the combustion body, air pipe and gas pipe are made of stainless steel, which has good high temperature resistance and can withstand stable operation in high temperature environments.

[0010] Preferably, the outer side walls of the second gas distribution plate, the long gas distribution tube and the short gas distribution tube are provided with a plurality of fuel nozzles to make the fuel distribution more uniform and improve the combustion efficiency.

[0011] Preferably, a number of combustion balls of different sizes are arranged inside the combustion-supporting air dispersion chamber and at the upper end of the first air distribution plate. The combustion balls are made of alumina. The fuel gas and oxygen are fully mixed when passing through the gap of the diameter of the combustion balls, and are ignited on the surface of the combustion balls to form flameless combustion. The combustion surface is large and is not affected by shape changes. The combustion balls can be used repeatedly, greatly improving their service life.

[0012] Beneficial effects of the utility model:

[0013] 1. The air pipe and the gas pipe are connected by welding to control the mixing ratio and combustion process of fuel and oxygen and promote the full mixing of fuel and oxygen;

[0014] 2. By setting the fuel nozzle to form tangential contact with the combustion air dispersion chamber, the fuel can be dispersed more evenly and the combustion efficiency can be improved;

[0015] 3. By setting up a number of combustion balls of different sizes, the gas and oxygen are fully mixed when passing through the gap of the combustion ball diameter, and then ignited on the surface of the combustion ball to form flameless combustion. The combustion surface is large and is not affected by shape changes. The combustion ball is made of alumina and can be used repeatedly, greatly improving its service life. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 What is shown is a schematic diagram of the internal cross-sectional structure of the combustion body of the utility model;

[0017] Figure 2 Shown is a schematic diagram of the installation structure of the long gas distribution pipe and the short gas distribution pipe of the utility model;

[0018] Figure 3 The diagram shown is a schematic diagram of the gas pipe connection structure of the utility model;

[0019] Figure 4 What is shown is a schematic diagram of the internal structure of the combustion-supporting air dispersion chamber of the present utility model.

[0020] Explanation of the reference numerals: 1-combustion body, 2-combustion-supporting air dispersion chamber, 3-air connecting pipe, 4-gas connecting pipe, 5-first gas distribution plate, 6-second gas distribution plate, 7-long gas distribution pipe, 8-short gas distribution pipe, 9-gas distribution pipe end plate, 10-intake end cover, 11-fuel nozzle, 12-combustion ball. DETAILED DESCRIPTION

[0021] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0022] See also Figure 1-2 The utility model provides an embodiment: a novel flameless combustion device, including a combustion body 1, a combustion-supporting air dispersion chamber 2 is arranged inside the combustion body 1 to control the mixing ratio of fuel and oxygen and the combustion process, and promote the full mixing of fuel and oxygen. The bottom rear end of the combustion body 1 is connected with an air pipe 3, which is connected by welding to ensure sufficient oxygen supply to support the combustion process. Oxygen can be provided by an external air pump or oxygen cylinder, etc. The top front end of the combustion body 1 is connected with a gas pipe 4, which is connected by welding. Fuels suitable for flameless combustion are selected, such as liquid fuel acetone, methanol, etc. or gas fuel natural gas, propane, etc., which have the characteristics of high calorific value and easy storage and transportation, and are more convenient to use. The combustion body 1, the air pipe 3 and the gas pipe 4 are made of stainless steel, have good high temperature resistance, and can withstand stable operation in a high temperature environment. A first gas distribution plate 5 is installed at the lower end of the combustion body 1.

[0023] See also Figure 3-4In the present embodiment, a second gas distributor 6 is arranged at the center of the top of the first gas distributor 5, and four groups of long gas tubes 7 are connected to the outer wall of the second gas distributor 6 at equal distances, and a short gas distributor 8 is arranged on the outer wall of the second gas distributor 6 and between two adjacent groups of long gas tubes 7, and a gas distributor end plate 9 is arranged at the outer ends of the long gas distributor 7 and the short gas distributor 8. An air intake end cover 10 is installed at the lower end of the second gas distributor 6, and a plurality of fuel nozzles 11 are provided on the outer walls of the second gas distributor 6, the long gas distributor 7 and the short gas distributor 8, so that the fuel is distributed more evenly and the combustion efficiency is improved. A plurality of combustion balls 12 of different sizes are arranged inside the combustion-supporting air dispersion chamber 2 and at the upper end of the first gas distributor 5. The combustion ball 12 is made of alumina. The fuel gas and oxygen are fully mixed when passing through the gap of the diameter of the combustion ball 12, so that they are ignited on the surface of the combustion ball 12 to form flameless combustion. The combustion surface is large and is not affected by shape changes. The combustion ball 12 can be used repeatedly, which greatly improves the service life.

[0024] First, the bottom of the combustion body 1 is connected with an air pipe 3 and a gas pipe 4, both of which are connected by welding to ensure sufficient oxygen and fuel suitable for flameless combustion to support the combustion process. The combustion body 1 is provided with a combustion-supporting air dispersion chamber 2 to control the mixing ratio of fuel and oxygen and the combustion process, promote the full mixing of fuel and oxygen, and make it more convenient to use.

[0025] At the same time, the combustion body 1, the air pipe 3 and the gas pipe 4 are made of stainless steel, have good high temperature resistance, and can withstand stable operation in high temperature environments. The outer walls of the second gas distribution plate 6, the long gas distribution tube 7 and the short gas distribution tube 8 are provided with a plurality of fuel nozzles 11, so that the fuel is distributed more evenly and the combustion efficiency is improved. A plurality of combustion balls 12 of different sizes are arranged inside the combustion-supporting air dispersion chamber 2 and at the upper end of the first gas distribution plate 5. The gas and oxygen are fully mixed when passing through the gap of the diameter of the combustion ball 12, and are ignited on the surface of the combustion ball 12 to form flameless combustion. The combustion surface is large and is not affected by shape changes. The combustion ball 12 is made of alumina and can be used repeatedly, which greatly improves the service life.

[0026] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of those skilled in the art without departing from the purpose of the present invention.

Claims

1. A novel flameless combustion device, comprising a combustion body (1); characterized in that: A first air distribution plate (5) is installed at the lower end of the combustion body (1), a second air distribution plate (6) is arranged at the center of the top of the first air distribution plate (5), four groups of long air tubes (7) are connected to the outer wall of the second air distribution plate (6) at equal distances, short air distribution tubes (8) are arranged on the outer wall of the second air distribution plate (6) and between two adjacent groups of long air tubes (7), air distribution tube end plates (9) are arranged at the outer ends of the long air distribution tubes (7) and the short air distribution tubes (8), and an air intake end cover (10) is installed at the lower end of the second air distribution plate (6).

2. A novel flameless combustion device according to claim 1, characterized in that: A combustion-supporting air dispersion chamber (2) is arranged inside the combustion body (1).

3. A novel flameless combustion device according to claim 1, characterized in that: The rear end of the bottom of the combustion body (1) is connected with an air pipe (3) by welding.

4. A novel flameless combustion device according to claim 1, characterized in that: The top front end of the combustion body (1) is connected with a gas pipe (4) by welding.

5. A novel flameless combustion device according to claim 1, characterized in that: The combustion body (1), the air pipe (3) and the gas pipe (4) are made of stainless steel.

6. A novel flameless combustion device according to claim 1, characterized in that: The outer side walls of the second gas distribution plate (6), the long gas distribution tube (7) and the short gas distribution tube (8) are all provided with a plurality of fuel nozzles (11).

7. A novel flameless combustion device according to claim 1, characterized in that: A plurality of combustion balls (12) of different sizes are arranged inside the combustion-supporting air dispersion chamber (2) and at the upper end of the first air distribution plate (5), and the combustion balls (12) are made of alumina.

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