Gas burner based on gradient magnetic field intensified combustion

Abstract

The invention relates to a gas burner, in particular to a gas burner based on gradient magnetic field intensified burning. A current controller; an insulating layer; a support tube; an exhaust nozzle; an upper combustion chamber; a central porous region; an annular porous region; a flow equalizing plate; a compressed air inlet; a gas inlet; an upper first electromagnet; an upper second electromagnet; an upper third electromagnet; an upper fourth electromagnet; a lower first electromagnet; a lower second electromagnet; a lower third electromagnet; and a lower fourth electromagnet. The current controller adjusts the magnetic field intensity of the electromagnet by adjusting the current intensity, the effect of the gradient magnetic field on oxygen is further adjusted, and gas combustion is enhanced. According to the device, a gradient magnetic field separation oxygen-enriched air technology and a porous medium combustion technology are combined, the gas combustion stability is improved, the combustible limit is expanded, and a new way is provided for efficient and clean utilization of gas fuel.

Description

TECHNICAL FIELD

[0001] The present application relates to a gas burner, in particular to a gas burner based on gradient magnetic field to strengthen combustion. BACKGROUND

[0002] With the rapid development of China's economy, domestic and foreign researchers have proposed various new gas combustion technologies, such as oxygen-enriched combustion technology, porous medium combustion technology, and supercharged combustion technology. The core function of the gas burner is to mix fuel gas and air in proportion to achieve stable combustion, and through precise control of the mixing of fuel gas and air, efficient heat energy conversion is achieved, which is widely used in industrial production, such as industrial boilers, chemical equipment and other places.

[0003] Oxygen-enriched combustion is a new type of combustion technology, which is to burn fuel in an environment with higher oxygen concentration than air, thereby obtaining higher combustion reaction speed and combustion temperature, and at the same time, the fuel combustion limit can be widened. Oxygen production using gradient magnetic field is a new technology.

[0004] The current public technology, application number 202210342492.7 "Device for extracting oxygen from fluid and manufacturing method thereof" and application number 201410111337.X "Gradient magnetic field assisted low temperature rectification air separation method and device" disclose a method for separating oxygen from liquid air using magnetic field, which is a combination of cryogenic method and magnetic field technology. The high investment cost and high energy consumption of the equipment require high sealing and pressure resistance of the related pressure vessels and pipelines.

[0005] Porous medium combustion refers to the combustion phenomenon of air and fuel gas in porous medium materials. The heat storage and good heat transfer performance of the porous medium can improve the flame stability, but the porous medium combustion still has non-stable phenomena such as flame surface tilting, cracking, and hot spot, which restricts the application and development of related technologies. SUMMARY

[0006] The purpose of the present application is to provide a gas burner based on gradient magnetic field to strengthen combustion, which adopts a non-premixed combustion method to prevent backfire and improve flame stability; a central porous zone and an annular porous zone are arranged inside to stabilize and promote gas combustion, and the gas is supercharged in the burner to achieve strengthened gas combustion.

[0007] The purpose of the present application can be achieved by the following technical solutions: A gas burner based on gradient magnetic field reinforced combustion, the burner comprising a direct current power supply; a current controller; a heat preservation layer; a support tube; an exhaust nozzle; an upper combustion chamber; a central porous zone; an annular porous zone; a flow equalizing plate; a compressed air inlet; a fuel gas inlet; an upper first electromagnet; an upper second electromagnet; an upper third electromagnet; an upper fourth electromagnet; a lower first electromagnet; a lower second electromagnet; a lower third electromagnet; and a lower fourth electromagnet. The support tube is a circular tube, the outer side of the support tube is provided with the heat preservation layer, and the inner side of the support tube is sequentially provided with the annular porous zone and the central porous zone; the upper combustion chamber is arranged above the central porous zone; the exhaust nozzle is arranged above the upper combustion chamber; the upper first electromagnet and the upper second electromagnet are arranged on the two sides of the heat preservation layer in a same-pole opposite manner; the upper third electromagnet and the upper fourth electromagnet are arranged on the two sides of the heat preservation layer in a same-pole opposite manner; the lower first electromagnet and the lower second electromagnet are arranged on the two sides of the heat preservation layer in a same-pole opposite manner; and the lower third electromagnet and the lower fourth electromagnet are arranged on the two sides of the heat preservation layer in a same-pole opposite manner.

[0008] Preferably, the support tube is made of a quartz tube or a non-magnetic material.

[0009] Preferably, the exhaust nozzle is a conical hole structure.

[0010] Preferably, the upper combustion chamber is a conical structure.

[0011] Preferably, the central porous zone is made of a conical foam ceramic and is made of silicon carbide.

[0012] Preferably, the annular porous zone is made of a foam ceramic and is made of silicon carbide.

[0013] Preferably, the porosity of the annular porous zone is smaller than that of the central porous zone.

[0014] Preferably, the center lines of the upper first electromagnet and the upper second electromagnet are perpendicular to the center lines of the upper third electromagnet and the upper fourth electromagnet.

[0015] Preferably, the center lines of the lower first electromagnet and the lower second electromagnet are perpendicular to the center lines of the lower third electromagnet and the lower fourth electromagnet.

[0016] The present application has the following beneficial effects: 1. The gas burner of the present application is internally arranged with a central porous area and an annular porous area, which are made of silicon carbide foam ceramics, have the characteristics of high temperature resistance and high heat storage, can stabilize and promote gas combustion, the device adopts a non-premixed combustion mode, can prevent backfire and improve flame stability; an exhaust nozzle is arranged at the outlet of the burner, compressed air and gas with a certain pressure are subjected to pressure combustion in the burner, and the combustion effect is good; the porosity of the annular porous area is less than that of the central porous area, which is conducive to the flow and diffusion of air to the central porous area and has a promoting effect on gas combustion.

[0017] 2. The direct current power supply of the present application is arranged with upper and lower electromagnets in a same-pole opposite manner, a significant gradient magnetic field is formed in the central region of the upper combustion chamber and the central porous area, the oxygen in the burner is magnetized in the magnetic field and moves to the central region, which can improve the gas combustion flame temperature, and according to Curie's law, the magnetic susceptibility of paramagnetic gas is proportional to the gas pressure, oxygen is paramagnetic gas, and the pressurized state of the burner is conducive to the action of the magnetic field on oxygen, which further strengthens the gas combustion. The current controller adjusts the current intensity to adjust the magnetic field intensity of the electromagnet and further adjust the action of the gradient magnetic field on oxygen, so as to achieve the purpose of strengthening the gas combustion. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the gas burner of the present application; Figure 2 It is a schematic diagram of the A-A cross section of Figure 1 Figure 3 It is a schematic diagram of the B-B cross section of Figure 1

[0019] In the figure: direct current power supply 1; current controller 2; heat preservation layer 3; support pipe 4; exhaust nozzle 5; upper combustion chamber 6; central porous area 7; annular porous area 8; flow equalizing plate 9; compressed air inlet 10; gas inlet 11; upper first electromagnet 12; upper second electromagnet 13; upper third electromagnet 14; upper fourth electromagnet 15; lower first electromagnet 16; lower second electromagnet 17; lower third electromagnet 18; lower fourth electromagnet 19. DETAILED DESCRIPTION

[0020] The present application will be further described in detail below in combination with the embodiments shown in the drawings.

[0021] The structure of the gas burner of the present application based on gradient magnetic field strengthening combustion is as follows: ​​As shown in the figure, the support tube 4 of the gas burner is a circular tube, the support tube 4 is externally provided with a heat insulation layer 3, the support tube 4 is internally provided with a center porous area 7 and an annular porous area 8 in sequence, the center porous area 7 is provided with an upper combustion chamber 6 above, the upper combustion chamber 6 is provided with an exhaust nozzle 5 above, the upper first electromagnet 12 and the upper second electromagnet 13 are arranged on the two sides of the heat insulation layer 3 with the same polarity, the upper third electromagnet 14 and the upper fourth electromagnet 15 are arranged on the two sides of the heat insulation layer 3 with the same polarity, the lower first electromagnet 16 and the lower second electromagnet 17 are arranged on the two sides of the heat insulation layer 3 with the same polarity, and the lower third electromagnet 18 and the lower fourth electromagnet 19 are arranged on the two sides of the heat insulation layer 3 with the same polarity. The support tube 4 is made of a quartz tube or a non-magnetic material. The exhaust nozzle 5 is a conical hole structure. The upper combustion chamber 6 is a conical structure. The center porous area 7 is made of a conical foam ceramic and is made of silicon carbide. The annular porous area 8 is made of a foam ceramic and is made of silicon carbide. The porosity of the annular porous area 8 is less than the porosity of the center porous area 7. The center lines of the upper first electromagnet 12 and the upper second electromagnet 13 are perpendicular to the center lines of the upper third electromagnet 14 and the upper fourth electromagnet 15. The center lines of the lower first electromagnet 16 and the lower second electromagnet 17 are perpendicular to the center lines of the lower third electromagnet 18 and the lower fourth electromagnet 19.

[0022] The working principle of the gas burner is as follows: When working, the compressed air of the gas burner enters the annular porous area 8 through the flow equalizing plate 9 from the compressed air inlet 10, and the fuel gas enters the center porous area 7 through the flow equalizing plate 9 from the fuel gas inlet 11; the compressed air flows and diffuses to the center porous area 7, and the fuel gas flows and diffuses to the annular porous area 8; part of the mixed compressed air and fuel gas is subjected to submerged combustion in the center porous area 7 and the annular porous area 8, and the remaining fuel gas and compressed air is subjected to combustion reaction in the upper combustion chamber 6; the high-temperature and high-pressure exhaust gas is discharged through the exhaust nozzle 5 for utilization; the porosity of the annular porous area is less than the porosity of the center porous area, which is conducive to the flow and diffusion of air to the center porous area and promotes gas combustion.

[0023] When the DC power supply 1 is turned on, the current enters the upper first electromagnet 12, the upper second electromagnet 13, the upper third electromagnet 14 and the upper fourth electromagnet 15 through the current controller 2 to generate a gradient magnetic field. The magnetic induction lines between the magnetic poles of the electromagnets with the same polarity repel each other to form a significant gradient magnetic field area in the central region of the upper combustion chamber 6. The oxygen around the central region moves to the center under the action of the magnetic field to promote gas combustion. When the DC power supply 1 is turned on, the current enters the lower first electromagnet 16, the lower second electromagnet 17, the lower third electromagnet 18 and the lower fourth electromagnet 19 through the current controller 2 to generate a gradient magnetic field. The magnetic induction lines between the magnetic poles of the electromagnets with the same polarity repel each other to form a significant gradient magnetic field area in the central region of the central porous area 7. The oxygen around the central region moves to the center under the action of the magnetic field to promote gas combustion. After the compressed air and the gas at a certain pressure are introduced, the burner is in a pressurized state, which strengthens the effect of the gradient magnetic field on the oxygen.

[0024] The current intensity is increased through the current controller 2, and the magnetic field intensity of the upper first electromagnet 12, the upper second electromagnet 13, the upper third electromagnet 14 and the upper fourth electromagnet 15 is increased at the same time to strengthen the combustion promotion effect. The current intensity is increased through the current controller 2, and the magnetic field intensity of the lower first electromagnet 16, the lower second electromagnet 17, the lower third electromagnet 18 and the lower fourth electromagnet 19 is increased at the same time to strengthen the combustion promotion effect.

Claims

1. A gas burner based on gradient magnetic field enhanced combustion, characterized by, The burner comprises a direct current power supply (1), a current controller (2), a thermal insulation layer (3), a support tube (4), an exhaust nozzle (5), an upper combustion chamber (6), a central porous zone (7), an annular porous zone (8), a flow equalizing plate (9), a compressed air inlet (10), a gas inlet (11), an upper first electromagnet (12), an upper second electromagnet (13), an upper third electromagnet (14), an upper fourth electromagnet (15), a lower first electromagnet (16), a lower second electromagnet (17), a lower third electromagnet (18), and a lower fourth electromagnet (19).

2. A gas burner based on the gradient magnetic field to intensify combustion according to claim 1, characterized in that, The support tube (4) is a circular tube, the outer side of the support tube (4) is provided with the thermal insulation layer (3), and the inner side of the support tube (4) is sequentially provided with the annular porous zone (8) and the central porous zone (7).

3. A gas burner based on the gradient magnetic field to intensify combustion according to claim 1, characterized in that, The exhaust nozzle (5) is a conical hole structure.

4. A gas burner based on the gradient magnetic field to intensify combustion according to claim 1, characterized in that, The upper combustion chamber (6) is a conical structure.

5. A gas burner based on the gradient magnetic field to intensify combustion according to claim 1, characterized in that, The central porous zone (7) is a conical foam ceramic and is made of silicon carbide.

6. A gas burner based on the gradient magnetic field to intensify combustion according to claim 1, characterized in that, The annular porous zone (8) is a foam ceramic and is made of silicon carbide.

7. A gas burner based on the gradient magnetic field to intensify combustion according to claim 1, characterized in that, The porosity of the annular porous zone (8) is less than that of the central porous zone (7).

8. A gas burner based on the gradient magnetic field to intensify combustion according to claim 1, characterized in that, The center lines of the upper first electromagnet (12) and the upper second electromagnet (13) are perpendicular to the center lines of the upper third electromagnet (14) and the upper fourth electromagnet (15).

9. A gas burner based on the gradient magnetic field to intensify combustion according to claim 1, characterized in that, The center lines of the lower first electromagnet (16) and the lower second electromagnet (17) are perpendicular to the center lines of the lower third electromagnet (18) and the lower fourth electromagnet (19).

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