A special combustion dredging device for heat storage grid

Abstract

The present invention relates to a combustion dredging device for a heat storage grid body, comprising: a mixer, a natural gas inlet and a combustion-supporting air inlet are provided on the mixer, and the combustion-supporting air inlet is connected to an external high-pressure centrifugal fan through a pipeline; a gun barrel, the shape of the gun barrel is an L-shape formed by connecting a connecting section and a flame-spraying section, and the mixer is connected to the beginning of the connecting section of the gun barrel; a combustion gun head, the combustion gun head is connected to the outlet end of the flame-spraying section of the gun barrel; the combustion gun head comprises a cylindrical shell and an injection assembly, the injection assembly is rotatably connected to the inside of the cylindrical shell, the injection assembly comprises a plurality of injection pipes distributed in a honeycomb shape, and the inner wall of the injection pipe is provided with a plurality of guide plates in a circumferential array, and the angle between the guide plate and the axis of the injection pipe is 10 to 30 degrees. The present invention has an obvious dredging effect on the heat storage chamber grid body, the labor intensity of the operator is greatly reduced, the safety factor is high, and the nitrogen oxide emission is significantly reduced.

Description

Technical Field

[0001] The invention belongs to the field of heat storage type grid body blockage dredging treatment of glass industry furnaces, and particularly relates to a special combustion dredging device for heat storage grid bodies. Background Art

[0002] Affected by the ultrafine powder in the batch material, the heat exchange holes of the lattice heat exchange chamber of the glass kiln will be blocked by the ultrafine powder, burnt gilt materials, eutectic materials, broken bricks, etc. in the batch material after a period of use, thereby affecting the passage of combustion-supporting air and heat exchange.

[0003] When the grid holes in the glass furnace regenerator are clogged, natural gas is generally used as fuel, and a centrifugal fan is used to blow air to assist combustion. The scale materials in the grid holes are melted and cleared through pipelines and burners, ultimately achieving the purpose of clearing the grid.

[0004] This method has defects and shortcomings when clearing the grid body:

[0005] 1. At present, the head of the natural gas combustion gun is a straight round tube, and there is no auxiliary structure in the tube mouth and the inner channel of the tube. Therefore, the natural gas and the combustion air are not mixed sufficiently, which affects the combustion efficiency and increases energy consumption. At the same time, the combustion process will produce a large amount of nitrogen oxides discharged into the atmosphere, causing environmental pollution and harming the health of operators;

[0006] 2. Since the natural gas and the combustion-supporting air are not mixed sufficiently, the combustion efficiency is low, and thus the flame temperature is low. Therefore, the sulfide that is blocked near the grate arch at the lower part of the grate body can be burned off, but the cleaning of the relatively deep grate holes is not ideal, and the operator needs to use mechanical methods to manually dredge them. Mechanical dredging will cause damage to the grate bricks, increase labor costs, and pose certain safety hazards.

[0007] Therefore, there is an urgent need to develop a high-efficiency combustion device that can burn natural gas more completely, more efficiently, and without damaging the grid body. Summary of the invention

[0008] The technical problem to be solved by the present invention is to provide a high-efficiency combustion device which can fully burn natural gas with higher efficiency and without damaging the grid body.

[0009] In order to solve the above technical problems, the technical solution adopted by the present invention is: a combustion dredging device dedicated to a heat storage grid body, comprising:

[0010] A mixer, wherein a natural gas inlet and a combustion-supporting air inlet are provided on the mixer, and the combustion-supporting air inlet is connected to an external high-pressure centrifugal fan through a pipeline;

[0011] A gun barrel, wherein the shape of the gun barrel is an L-shape formed by connecting a connecting section and a flame-spraying section, and the mixer is connected to the beginning of the connecting section of the gun barrel;

[0012] A combustion gun head, which is connected to the outlet end of the flame-spraying section of the gun barrel; the combustion gun head comprises a cylindrical shell and an injection assembly, the injection assembly is rotatably connected to the inside of the cylindrical shell, the injection assembly comprises a plurality of injection pipes distributed in a honeycomb pattern, the inner wall of the injection pipe is provided with a plurality of guide plates distributed in a circular array, and the angle between the guide plate and the axis of the injection pipe is 10 to 30 degrees.

[0013] Furthermore, the inner wall of each of the injection pipes is provided with three guide plates.

[0014] Furthermore, the injection assembly also includes a circular connecting plate, which is connected to the outlet end of each injection pipe, and the connecting plate is provided with avoidance holes corresponding to each injection pipe one by one, and the connecting plate is rotatably connected to the cylindrical shell.

[0015] Furthermore, an annular groove is provided on the inner edge of the outlet end of the cylindrical shell, and the edge of the connecting plate is connected to the annular groove in a sliding fit.

[0016] Furthermore, the injection pipe is composed of a first injection pipe located in the middle and a plurality of second injection pipes surrounding the first injection pipe.

[0017] Furthermore, the diameter of the first nozzle is greater than the diameter of the second nozzle.

[0018] Furthermore, the connecting section of the gun barrel is connected by two or more sections of natural gas pipelines through flange bolts.

[0019] Furthermore, the inner diameter of the gun barrel is 150 mm to 250 mm.

[0020] The beneficial effects of the present invention are:

[0021] 1. By comparing with the existing technology and its application effect, the time for dredging the grid body of the burner is shortened by about 30%, and the consumption of natural gas is saved by about 25%.

[0022] 2. This burner can promote the full mixing of natural gas and combustion-supporting air, and make the flame have the function of rotation adjustment. The flame radiation intensity is enhanced, and the deep grid holes that are blocked can be burned cleanly. The application effect is obvious, the emission of nitrogen oxides is significantly reduced, the pollution to the atmosphere is reduced, and the harm to human health is reduced.

[0023] 3. The burner has high flame temperature, long flame length, large flame rigidity and strong cutting force, and can clear the grid body very thoroughly, eliminating the need for manual machinery to clear the grid on site, reducing labor costs, reducing damage to the grid body, and avoiding hidden dangers of harm to personnel safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of a burner dedicated to a regenerator grid body according to a specific embodiment of the present invention;

[0025] Figure 2 A schematic diagram of the structure of a combustion gun head of a burner dedicated to a regenerator grid body according to a specific embodiment of the present invention;

[0026] Figure 3 It is a schematic diagram of the explosion (anatomy) of the combustion gun head structure of a burner dedicated to a regenerator grid body according to a specific embodiment of the present invention;

[0027] Description of labels:

[0028] 1. Mixer; 11. Natural gas inlet; 12. Combustion air inlet; 2. Gun barrel; 21. Connecting section; 22. Flame spraying section; 3. Burning gun head; 31. Cylindrical shell; 311. Annular groove; 32. Injection assembly; 321. Injection pipe; 3211. First nozzle; 3212. Second nozzle; 322. Guide plate; 323. Connecting plate; 4. Flange. DETAILED DESCRIPTION

[0029] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following is an explanation in combination with the implementation modes and the accompanying drawings.

[0030] Please refer to Figures 1 to 3 The present invention relates to a combustion dredging device for a heat storage grid body, comprising:

[0031] A mixer 1, wherein the mixer 1 is provided with a natural gas inlet 11 and a combustion-supporting air inlet 12, and the combustion-supporting air inlet 12 is connected to an external high-pressure centrifugal fan through a pipeline;

[0032] The gun barrel 2 is in an L-shape formed by connecting a connecting section 21 and a flame-spraying section 22, and the mixer 1 is connected to the beginning of the connecting section 21 of the gun barrel 2;

[0033] A combustion gun head 3, which is connected to the outlet end of the flame-spraying section 22 of the gun barrel 2; the combustion gun head 3 includes a cylindrical shell 31 and an injection assembly 32, the injection assembly 32 is rotatably connected to the inside of the cylindrical shell 31, and the injection assembly 32 includes a plurality of injection pipes 321 distributed in a honeycomb pattern, and the inner wall of the injection pipe 321 is provided with a plurality of guide plates 322 distributed in a circular array, and the angle between the guide plate 322 and the axis of the injection pipe 321 is 10 to 30 degrees.

[0034] In the above-mentioned combustion dredging device structure dedicated to the heat storage grid body, an L-shaped gun barrel 2 structure is designed to facilitate the gun head to aim at the blocked area of ​​the heat storage chamber grid body for spraying. The injection pipe 321 in the combustion gun head 3 is designed to be automatically rotatably connected to the cylindrical shell 31 under the action of the hot air flow, and a guide plate 322 with a certain angle is arranged inside the injection pipe 321, so that when spraying fire, the flame can drive the injection pipe 321 to rotate through the guide plate 322, so that the flame forms a vortex, forcing the combustion gas to be ejected in the axial direction, so as to achieve the purpose of more concentrated flame, higher flame tip temperature, stronger rigidity, and greater cutting force. The flame can drive the injection pipe 321 to rotate through the guide plate 322, thereby enhancing the radiation characteristics of the natural gas flame, and also making the fuel burn more fully, so as to achieve the purpose of effectively reducing nitrogen oxide emissions, making the flame length longer, so that the grid body holes with deeper blockages can be thoroughly dredged. Among them, if the angle between the guide plate 322 and the axis of the injection pipe 321 is less than 10 degrees, no vortex can be formed.

[0035] Furthermore, in the above-mentioned combustion dredge structure dedicated to the heat storage grid body, three guide plates 322 are provided on the inner wall of each of the injection pipes 321 .

[0036] Experiments have shown that, with three guide plates 322, the mixture of natural gas and combustion-supporting air can be burned more fully. Too many or too few guide plates will affect the combustion efficiency. The reason may be that if the number of guide plates 322 is too small, the driving force for the flame to drive the injection pipe 321 to rotate is insufficient, and if the number of guide plates 322 is too large, the intensity of the flame injection is affected.

[0037] Furthermore, in the above-mentioned combustion dredging device structure dedicated to the heat storage grid body, the injection assembly 32 also includes a circular connecting plate 323, which is connected to the outlet end of each injection pipe 321, and the connecting plate 323 is provided with avoidance holes corresponding to each injection pipe 321 one by one, and the connecting plate 323 is rotatably connected to the cylindrical shell 31.

[0038] As can be seen from the above description, the connecting plate 323 plays a role in positioning and fixing the injection tubes 321 , also plays a role in sealing the gun head, and also serves as a medium for rotatably connecting the injection tube 321 and the cylindrical shell 31 .

[0039] Furthermore, in the above-mentioned combustion dredge structure dedicated to the heat storage grid body, an annular groove 311 is provided on the inner edge of the outlet end of the cylindrical shell 31 , and the edge of the connecting plate 323 is connected to the annular groove 311 in a sliding fit.

[0040] Furthermore, in the above-mentioned combustion dredge structure dedicated to the heat storage grid body, the injection pipe 321 is composed of a first nozzle 3211 located in the middle and a plurality of second nozzles 3212 surrounding the first nozzle 3211 .

[0041] Furthermore, in the above-mentioned combustion dredge structure dedicated to the heat storage grid body, the diameter of the first nozzle 3211 is greater than the diameter of the second nozzle 3212.

[0042] Furthermore, in the above-mentioned combustion dredging device structure dedicated to the heat storage grid body, the connecting section 21 of the gun barrel 2 is connected by two or more sections of natural gas pipelines through flanges 4 bolts.

[0043] Furthermore, in the above-mentioned combustion dredging device structure dedicated to the heat storage grid body, the inner diameter of the gun barrel 2 is 150 mm to 250 mm.

[0044] The burner is made of special heat-resistant steel, and the length of the natural gas pipeline at the connecting end is 1200 to 2000 mm.

[0045] Example 1

[0046] A combustion dredging device specially used for a heat storage grid body comprises: a mixer 1, on which a natural gas inlet 11 and a combustion-supporting air inlet 12 are provided, and the combustion-supporting air inlet 12 is connected to an external high-pressure centrifugal fan through a pipeline; a gun barrel 2, the gun barrel 2 is in an L-shape formed by a connecting section 21 and a flame-spraying section 22, and the mixer 1 is connected to the starting end of the connecting section 21 of the gun barrel 2; a combustion gun head 3, the combustion gun head 3 is connected to the outlet end of the flame-spraying section 22 of the gun barrel 2; the combustion gun head 3 comprises a cylindrical outer shell 31 and an injection assembly 32, the injection assembly 32 is rotatably connected to the inside of the cylindrical outer shell 31, and the injection assembly 32 comprises a plurality of injection pipes 321 distributed in a honeycomb shape, and the inner wall of the injection pipe 321 is provided with a plurality of guide plates 322 in a circumferential array, and the angle between the guide plate 322 and the axis of the injection pipe 321 is 10 to 30 degrees.

[0047] By designing an L-shaped gun barrel 2 structure, it is convenient for the gun head to aim at the blocked area of ​​the heat storage chamber grid body for spraying. The injection pipe 321 in the combustion gun head 3 is designed to be rotatably connected to the cylindrical shell 31, and a guide plate 322 with a certain angle is arranged inside the injection pipe 321, so that when spraying fire, the flame can drive the injection pipe 321 to rotate through the guide plate 322, so that the flame forms a vortex, forcing the combustion gas to be ejected in the axial direction, so as to achieve the purpose of more concentrated flame, higher flame tip temperature, stronger rigidity, and greater cutting force. The flame can drive the injection pipe 321 to rotate through the guide plate 322, thereby enhancing the radiation characteristics of the natural gas flame and making the fuel burn more fully, so as to effectively reduce nitrogen oxide emissions, make the flame length longer, and enable the grid body holes that are more deeply blocked to be completely cleared. Among them, if the angle between the guide plate 322 and the axis of the injection pipe 321 is less than 10 degrees, no vortex can be formed.

[0048] The inner wall of each injection pipe 321 is provided with three guide plates 322. The injection assembly 32 also includes a circular connecting plate 323, which is connected to the outlet end of the injection pipe 321. The connecting plate 323 is provided with avoidance holes corresponding to each injection pipe 321, and the connecting plate 323 is rotatably connected to the cylindrical shell 31. The inner edge of the outlet end of the cylindrical shell 31 is provided with an annular groove 311, and the edge of the connecting plate 323 is slidably connected with the annular groove 311. The injection pipe 321 is composed of a first nozzle 3211 located in the middle and a plurality of second nozzles 3212 surrounding the first nozzle 3211. The diameter of the first nozzle 3211 is larger than the diameter of the second nozzle 3212. The connecting section 21 of the gun barrel 2 is connected by two or more sections of natural gas pipelines through flange 4 bolts. The inner diameter of the gun barrel 2 is 150mm to 250mm. The burner is made of special heat-resistant steel, and the length of the natural gas pipeline at the connecting end is 1200 to 2000 mm.

[0049] In summary, the present invention has a very obvious dredging effect on the regenerator grid body, with a dredging rate of 100%, greatly reduced labor intensity of operators, high safety factor, significantly reduced nitrogen oxide emissions, and significantly improved environment.

[0050] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent transformations made using the contents of the present invention's specification and drawings, or directly or indirectly applied in related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A combustion dredging device for heat storage grid body, characterized in that: include: A mixer, wherein a natural gas inlet and a combustion-supporting air inlet are provided on the mixer, and the combustion-supporting air inlet is connected to an external high-pressure centrifugal fan through a pipeline; A gun barrel, wherein the shape of the gun barrel is an L-shape formed by connecting a connecting section and a flame-spraying section, and the mixer is connected to the beginning of the connecting section of the gun barrel; A combustion gun head, the combustion gun head is connected to the outlet of the flame spraying section of the gun barrel; the combustion gun head comprises a cylindrical shell and an injection assembly, the injection assembly comprises a plurality of injection pipes distributed in a honeycomb shape, the injection pipes are rotatably connected to the inside of the cylindrical shell, the inner wall of the injection pipe is provided with three guide plates distributed in a circumferential array, and the angle between the guide plate and the axis of the injection pipe is 10 to 30 degrees; The injection assembly further comprises a circular connecting plate, which is respectively connected to the outlets of the injection pipes, and is provided with avoidance holes corresponding to the injection pipes one by one, and the connecting plate is rotatably connected to the cylindrical shell.

2. The combustion dredging device for heat storage grid body according to claim 1 is characterized in that: An annular groove is arranged on the inner edge of the outlet end of the cylindrical shell, and the edge of the connecting plate is connected with the annular groove in a sliding fit.

3. The combustion dredging device for heat storage grid body according to claim 1 is characterized in that: The injection pipe is composed of a first injection pipe located in the middle and a plurality of second injection pipes surrounding the first injection pipe.

4. The combustion dredging device for heat storage grid body according to claim 3 is characterized in that: The diameter of the first nozzle is greater than the diameter of the second nozzle.

5. The combustion dredging device for heat storage grid body according to claim 1 is characterized in that: The connecting section of the gun barrel is connected by two or more sections of natural gas pipelines through flange bolts.

6. The combustion dredging device for heat storage grid body according to claim 5, characterized in that: The inner diameter of the gun barrel is 150 mm to 250 mm.

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