A premixed combustion natural gas burner suitable for carbon black production

Abstract

The application discloses a premixed combustion natural gas burner suitable for carbon black production, which comprises an air extraction box and a natural gas inlet pipe, the end of the natural gas inlet pipe is provided with a valve, the end of the natural gas inlet pipe away from the valve is connected with a combustion chamber through a first flange plate, the end of the combustion chamber away from the first flange plate is connected with a flame spout through a third flange plate, the lateral wall of the air extraction box is fixedly connected with a shell, the upper end of the combustion chamber is fixedly connected with an air inlet pipe, the lateral wall of the shell is provided with a conveying pipe, and the conveying pipe and the air inlet pipe are connected through a second flange plate. The application has a reasonable structure, the filter mechanism and the air pumping mechanism are arranged, impurities in the air are filtered, impurities in the air are avoided, the combustion effect is not affected after the impurities enter the combustion chamber, the driving mechanism and the mixing mechanism are arranged, the natural gas and the air pumped in are mixed, the mixing effect is improved, and the combustion efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of natural gas burners, in particular to a premixed combustion natural gas burner suitable for carbon black production. BACKGROUND

[0002] Carbon black production generally uses natural gas as fuel, and since the time experienced by carbon black reaction is extremely short, usually in tens to hundreds of milliseconds, it is crucial whether the fuel can be fully combusted within a given time. If it cannot be fully combusted within a given time, not only will the yield of the product decrease, but the quality of the carbon black will also be severely affected. The impact on special varieties of carbon black such as ultra-wear-resistant series products is even greater.

[0003] Generally, when natural gas is used as fuel, the combustion-supporting gas will use air. According to the prior art, when injecting air as a combustion gas, the traditional natural gas burner inputs air into the combustion chamber in the burner through a fan. However, the traditional method does not filter the air, resulting in a large amount of impurities in the injected air, which affects the combustion effect of the burner. At the same time, in the prior art, the flow of natural gas and air through the mixing chamber in the traditional burner is relatively stable, which makes the mixing effect of natural gas and air poor, resulting in low combustion efficiency of natural gas. SUMMARY

[0004] The purpose of the present application is to solve the problems existing in the prior art and provide a premixed combustion natural gas burner suitable for carbon black production. By setting a filtering mechanism and a gas pumping mechanism, the impurities in the air are filtered to avoid the presence of impurities in the air, which affects the combustion effect after entering the combustion chamber. By setting a driving mechanism and a mixing mechanism, the pumped natural gas and air are mixed to improve the mixing effect and thus improve the combustion efficiency.

[0005] In order to achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0006] The application discloses a premixed combustion natural gas burner suitable for carbon black production, which comprises an air suction box and a natural gas inlet pipe, the end of the natural gas inlet pipe is provided with a valve, the end of the natural gas inlet pipe away from the valve is connected with a combustion chamber through a first flange plate, the end of the combustion chamber away from the first flange plate is connected with a flame nozzle through a third flange plate, the side wall of the air suction box is fixedly connected with a shell, the upper end of the combustion chamber is fixedly connected with an air inlet pipe, the side wall of the shell is provided with a conveying pipe, the conveying pipe and the air inlet pipe are connected through a second flange plate, the air suction box is provided with a filtering mechanism for filtering air, the filtering mechanism comprises a filter screen fixedly connected to the inner wall of the air suction box, the shell is provided with a pumping mechanism for pumping air to the combustion chamber, the inner part of the air suction box is provided with a cleaning mechanism for cleaning the filter screen, the side wall of the combustion chamber is provided with a through hole, the combustion chamber is provided with a mixing mechanism for mixing natural gas and air, and the combustion chamber is provided with an annular cavity, and the annular cavity is provided with a driving mechanism for driving the mixing mechanism.

[0007] Preferably, the pumping mechanism comprises a fan shaft rotatably connected to the inner wall of the shell, and a fan is fixedly sleeved on the fan shaft.

[0008] Preferably, the cleaning mechanism comprises a vertical rod slidingly connected to the lower end of the air suction box, a cleaning plate fixedly connected to the upper end of the vertical rod, and a moving plate fixedly connected to the lower end of the vertical rod.

[0009] Preferably, the lower end of the air suction box is rotatably connected with a reciprocating screw rod, the reciprocating screw rod passes through the moving plate and is matched with the moving plate, a bevel gear is fixedly sleeved on the fan shaft and the reciprocating screw rod, and the two bevel gears are meshed.

[0010] Preferably, the mixing mechanism comprises a threaded sleeve rotatably connected to the inner wall of the combustion chamber, a mixing blade fixedly sleeved on the threaded sleeve, a cleaning magnetic ring slidingly connected in the combustion chamber, a transverse plate fixedly connected between the inner walls of the two ends of the cleaning magnetic ring, a threaded rod fixedly connected to the side wall of the transverse plate, and the threaded rod is inserted into the threaded sleeve and is threadedly connected with the threaded sleeve.

[0011] Preferably, the driving mechanism comprises a magnetic piston slidingly connected in the annular cavity, and an air bag fixedly connected between the moving plate and the combustion chamber and communicated with the annular cavity.

[0012] Preferably, the side wall of the magnetic piston and the inner wall of the annular cavity are elastically connected through two symmetrically arranged springs, and the magnetic piston and the cleaning magnetic ring are attracted to each other.

[0013] Preferably, the side wall of the end of the air suction box away from the shell is provided with a pipeline, and the first flange plate is provided with an ignition device.

[0014] Compared with the prior art, the beneficial effects of this invention are as follows:

[0015] 1. By setting up a filtration mechanism and an air pumping mechanism, the rotation of the fan draws air from the air extraction box into the combustion chamber through the delivery pipe and the air inlet pipe. Under the action of the filter screen, impurities in the air are filtered to prevent impurities from affecting the combustion effect after entering the combustion chamber.

[0016] 2. By setting up a cleaning mechanism, the rotation of the fan drives the fan shaft to rotate. Under the transmission of the bevel gear, the reciprocating screw rotates. The rotation of the reciprocating screw drives the moving plate that works with it to move back and forth. The reciprocating movement of the moving plate drives the vertical rod to move back and forth. The reciprocating movement of the vertical rod drives the cleaning plate to move back and forth. The cleaning plate continuously scrapes the surface of the filter screen, scraping off the dust on the filter screen, thus cleaning the filter screen and preventing dust from clogging the filter screen.

[0017] 3. By setting up a drive mechanism and a mixing mechanism, the reciprocating movement of the moving plate can continuously squeeze and stretch the airbag. When the airbag is squeezed, gas is pumped into the annular cavity, thereby pushing the magnetic piston to move. When the airbag contracts, the gas in the annular cavity is drawn into the airbag. Under the action of the spring, the magnetic piston returns to its original position. The reciprocating movement of the magnetic piston drives the cleaning magnetic ring attracted to it to reciprocate. The reciprocating movement of the cleaning magnetic ring drives the horizontal plate to reciprocate, causing the threaded rod to reciprocate. Under the action of the threaded rod, the threaded sleeve rotates, driving the mixing blade to rotate, thereby mixing the pumped natural gas and air, improving the mixing effect, and thus improving the combustion efficiency. At the same time, the reciprocating movement of the cleaning magnetic ring can clean the inner wall of the combustion chamber, preventing carbon deposits from accumulating on the inner wall of the combustion chamber after long-term use, which would affect the combustion effect. Attached Figure Description

[0018] Figure 1 This is a perspective view of a premixed combustion natural gas burner suitable for carbon black production, as proposed in this invention.

[0019] Figure 2 This is a schematic diagram of the structure of a premixed combustion natural gas burner suitable for carbon black production, as proposed in this invention.

[0020] Figure 3 This is a cross-sectional view of a premixed combustion natural gas burner suitable for carbon black production, as proposed in this invention.

[0021] Figure 4 for Figure 3 Enlarged view of the structure at point A in the image;

[0022] Figure 5 for Figure 3 Enlarged view of the structure at point B in the image;

[0023] Figure 6 A schematic diagram of a combustion chamber structure of a premixed combustion natural gas burner suitable for carbon black production is provided for the present application.

[0024] Figure 7 A schematic diagram of a clean magnetic ring structure of a premixed combustion natural gas burner suitable for carbon black production is provided for the present application.

[0025] In the figure: 1 air suction box, 2 valve, 3 natural gas inlet pipe, 4 first flange, 5 combustion chamber, 6 ignition device, 7 conveying pipe, 8 second flange, 9 reciprocating screw rod, 10 spring, 11 moving plate, 12 shell, 13 air bag, 14 third flange, 15 flame nozzle, 16 pipe, 17 threaded sleeve, 18 threaded rod, 19 mixing blade, 20 through hole, 21 air inlet pipe, 22 fan shaft, 23 fan, 24 cross plate, 25 filter screen, 26 cleaning plate, 27 vertical rod, 28 clean magnetic ring, 29 magnetic piston, 30 annular cavity. DETAILED DESCRIPTION

[0026] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, a large number of specific details are set forth in order to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the scope of the present application, so the present application is not limited to the specific embodiments disclosed below.

[0027] REFERENCE Figures 1-7 A premixed combustion natural gas burner suitable for carbon black production, comprising an air suction box 1 and a natural gas inlet pipe 3, the end of the natural gas inlet pipe 3 is provided with a valve 2, the end of the natural gas inlet pipe 3 away from the valve 2 is connected with a combustion chamber 5 through a first flange 4, the end of the combustion chamber 5 away from the first flange 4 is connected with a flame nozzle 15 through a third flange 14, the side wall of the air suction box 1 is fixedly connected with a shell 12, the upper end of the combustion chamber 5 is fixedly connected with an air inlet pipe 21, the side wall of the shell 12 is provided with a conveying pipe 7, the conveying pipe 7 and the air inlet pipe 21 are connected through a second flange 8, the air suction box 1 is provided with a filtering mechanism for filtering air, the filtering mechanism comprises a filter screen 25 fixedly connected to the inner wall of the air suction box 1, the side wall of the end of the air suction box 1 away from the shell 12 is provided with a pipe 16, and the first flange 4 is provided with an ignition device 6.

[0028] The shell 12 is provided with a gas pumping mechanism for pumping gas in the combustion chamber 5, the gas pumping mechanism comprises a fan shaft 22 rotatably connected to the inner wall of the shell 12, and a fan 23 fixedly sleeved on the fan shaft 22.

[0029] The inside of the air suction box 1 is provided with a cleaning mechanism for cleaning the filter screen 25, which comprises a vertical rod 27 slidingly connected to the lower end of the air suction box 1, the upper end of the vertical rod 27 is fixedly connected with a cleaning plate 26, the lower end of the vertical rod 27 is fixedly connected with the moving plate 11, the lower end of the air suction box 1 is rotatably connected with a reciprocating screw rod 9, the reciprocating screw rod 9 penetrates through the moving plate 11 and cooperates with it, the fan shaft 22 and the reciprocating screw rod 9 are both fixedly sleeved with a bevel gear, the two bevel gears are meshed, and the cleaning mechanism is arranged.

[0030] A through hole 20 is formed in the side wall of the combustion chamber 5, and a mixing mechanism for mixing natural gas and air is arranged in the combustion chamber 5, which comprises a threaded sleeve 17 rotatably connected to the inner wall of the combustion chamber 5, a mixing blade 19 fixedly sleeved on the threaded sleeve 17, a cleaning magnetic ring 28 slidingly connected in the combustion chamber 5, a horizontal plate 24 fixedly connected between the inner walls of the two ends of the cleaning magnetic ring 28, a threaded rod 18 fixedly connected on the side wall of the horizontal plate 24, and the threaded rod 18 is inserted into the threaded sleeve 17 and threadedly connected therewith, so that the cleaning plate 26 continuously scrapes the surface of the filter screen 25, and the dust on the filter screen 25 is scraped off, thereby cleaning the filter screen 25 and avoiding dust from blocking the filter screen 25.

[0031] An annular cavity 30 is formed in the combustion chamber 5, and a driving mechanism for driving the mixing mechanism is arranged in the annular cavity 30, which comprises a magnetic piston 29 slidingly connected in the annular cavity 30, a gas bag 13 fixedly connected between the moving plate 11 and the combustion chamber 5, the gas bag 13 communicates with the annular cavity 30, two air holes are formed in the side wall of the combustion chamber 5 and communicate with the annular cavity 30, the side wall of the magnetic piston 29 and the inner wall of the annular cavity 30 are elastically connected by two symmetrically arranged springs 10, the magnetic piston 29 and the cleaning magnetic ring 28 are attracted to each other, the reciprocating movement of the moving plate 11 can continuously press and stretch the gas bag 13, when the gas bag 13 is pressed, the gas is pumped into the annular cavity 30, thereby pushing the magnetic piston 29 to move, when the gas bag 13 contracts, the gas in the annular cavity 30 is sucked into the gas bag 13, under the action of the spring 10, the magnetic piston 29 resets, the reciprocating movement of the magnetic piston 29 drives the cleaning magnetic ring 28 which is attracted to it to reciprocate, the reciprocating movement of the cleaning magnetic ring 28 drives the horizontal plate 24 to reciprocate, so that the threaded rod 18 reciprocates, under the action of the threaded rod 18, the threaded sleeve 17 rotates, driving the mixing blade 19 to rotate, thereby mixing the pumped natural gas and air, improving the mixing effect, thereby improving the combustion efficiency, it is worth mentioning that the reciprocating movement of the cleaning magnetic ring 28 can clean the inner wall of the combustion chamber 5, avoiding the accumulation of carbon on the inner wall of the combustion chamber 5 after long-term use, affecting the combustion effect.

[0032] When the application is used, natural gas is introduced into the natural gas inlet pipe 3 through the valve 2, the natural gas inlet pipe 3 enters the combustion chamber 5 through the through hole 20, the fan 23 is started to rotate, the air in the air suction box 1 is sucked into the combustion chamber 5 through the conveying pipe 7 and the air inlet pipe 21, under the action of the filter screen 25, the impurities in the air are filtered, so that the impurities in the air are avoided to affect the combustion effect after entering the combustion chamber 5;

[0033] The rotation of the fan 23 drives the rotation of the fan shaft 22, under the transmission of the bevel gear, the reciprocating lead screw 9 rotates, the reciprocating movement of the reciprocating lead screw 9 drives the reciprocating movement of the moving plate 11 matched therewith, the reciprocating movement of the moving plate 11 drives the reciprocating movement of the vertical rod 27, the reciprocating movement of the vertical rod 27 drives the reciprocating movement of the cleaning plate 26, the cleaning plate 26 continuously scrapes the surface of the filter screen 25 to scrape off the dust on the filter screen 25, so that the filter screen 25 is cleaned, and the filter screen 25 is prevented from being blocked by dust.

[0034] The reciprocating movement of the moving plate 11 can continuously extrude and stretch the air bag 13, when the air bag 13 is extruded, the gas is pumped into the annular cavity 30, so as to drive the movement of the magnetic piston 29, when the air bag 13 is contracted, the gas in the annular cavity 30 is sucked into the air bag 13, under the action of the spring 10, the magnetic piston 29 is reset, the reciprocating movement of the magnetic piston 29 drives the reciprocating movement of the cleaning magnetic ring 28 attracted thereto, the reciprocating movement of the cleaning magnetic ring 28 drives the reciprocating movement of the horizontal plate 24, so that the threaded rod 18 reciprocates, under the action of the threaded rod 18, the threaded sleeve 17 rotates to drive the rotation of the mixing blade 19, so that the natural gas and air pumped in are mixed, the mixing effect is improved, so as to improve the combustion efficiency, and the reciprocating movement of the cleaning magnetic ring 28 can clean the inner wall of the combustion chamber 5, so that the accumulated carbon on the inner wall of the combustion chamber 5 after long-term use is avoided to affect the combustion effect.

[0035] The above is only a preferred specific embodiment of the application, but the protection scope of the application is not limited thereto, any person skilled in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the application within the technical range disclosed by the application, which should be covered in the protection scope of the application.

Claims

1. A premixed combustion natural gas burner suitable for carbon black production comprising an air extraction box (1) and a natural gas inlet pipe (3), characterized in that, The end of the natural gas inlet pipe (3) is provided with a valve (2), and the end of the natural gas inlet pipe (3) away from the valve (2) is connected with a combustion chamber (5) through a first flange plate (4), the end of the combustion chamber (5) away from the first flange plate (4) is connected with a flame nozzle (15) through a third flange plate (14), the side wall of the air tank (1) is fixedly connected with a shell (12), the upper end of the combustion chamber (5) is fixedly connected with an air inlet pipe (21), the side wall of the shell (12) is provided with a conveying pipe (7), the conveying pipe (7) and the air inlet pipe (21) are connected through a second flange plate (8), the air tank (1) is provided with a filtering mechanism for filtering air, the filtering mechanism comprises a filter screen (25) fixedly connected to the inner wall of the air tank (1), the shell (12) is provided with a pumping mechanism for pumping the combustion chamber (5), the inside of the air tank (1) is provided with a cleaning mechanism for cleaning the filter screen (25), the side wall of the combustion chamber (5) is provided with a through hole (20), the combustion chamber (5) is provided with a mixing mechanism for mixing natural gas and air, the combustion chamber (5) is provided with an annular cavity (30), and the annular cavity (30) is provided with a driving mechanism for driving the mixing mechanism.

2. A premix combustion natural gas burner suitable for carbon black production according to claim 1, characterized in that, The pumping mechanism comprises a fan shaft (22) rotatably connected to the inner wall of the shell (12), and a fan (23) fixedly sleeved on the fan shaft (22).

3. A premix combustion natural gas burner suitable for carbon black production according to claim 2, characterized in that, The cleaning mechanism comprises a vertical rod (27) slidably connected to the lower end of the air tank (1), a cleaning plate (26) fixedly connected to the upper end of the vertical rod (27), and a moving plate (11) fixedly connected to the lower end of the vertical rod (27).

4. A premix combustion natural gas burner suitable for carbon black production according to claim 3, characterized in that, The lower end of the air tank (1) penetrates and rotatably connects a reciprocating lead screw (9), the reciprocating lead screw (9) penetrates the moving plate (11) and cooperates with the moving plate (11), the fan shaft (22) and the reciprocating lead screw (9) are fixedly sleeved with bevel gears, and the two bevel gears are meshed.

5. A premix combustion natural gas burner suitable for carbon black production according to claim 4, characterized in that, The mixing mechanism comprises a threaded sleeve (17) rotatably connected to the inner wall of the combustion chamber (5), a mixing blade (19) fixedly sleeved on the threaded sleeve (17), a cleaning magnetic ring (28) slidably connected in the combustion chamber (5), a horizontal plate (24) fixedly connected between the inner walls of the two ends of the cleaning magnetic ring (28), and a threaded rod (18) fixedly connected to the side wall of the horizontal plate (24) and inserted in the threaded sleeve (17) and threadedly connected with the threaded sleeve (17).

6. A premix combustion natural gas burner suitable for carbon black production according to claim 5, characterized in that, The driving mechanism comprises a magnetic piston (29) slidably connected in the annular cavity (30), and an air bag (13) fixedly connected between the moving plate (11) and the combustion chamber (5) and in communication with the annular cavity (30).

7. A premix combustion natural gas burner suitable for carbon black production according to claim 6, characterized in that, The side wall of the magnetic piston (29) and the inner wall of the annular cavity (30) are elastically connected through two symmetrically arranged springs (10), and the magnetic piston (29) and the cleaning magnetic ring (28) are attracted to each other.

8. A premix combustion natural gas burner suitable for carbon black production according to claim 7, characterized in that, The air extraction box (1) is provided with a pipeline (16) on the end side wall away from the shell (12), and the first flange plate (4) is provided with an ignition device (6).

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