Natural gas combustion lance for large glass furnaces

Abstract

The application discloses a natural gas combustion spray gun for a large glass furnace, which comprises a coaxially arranged outer sleeve and an inner sleeve; a flow guide column is fixed at the front end of the inner sleeve, and an arc-shaped flow guide groove is formed in the circumferential surface of the flow guide column; a blind hole is formed at the front end of the flow guide column, and a third flow guide hole is formed in the flow guide column and is communicated with the arc-shaped flow guide groove and the blind hole; a second flow guide hole and a first flow guide hole are sequentially formed at the front end of the inner sleeve from front to back, and the second flow guide hole and the first flow guide hole are directed to the arc-shaped flow guide groove on the flow guide column; a heat insulation sleeve is sleeved at the front end of the outer sleeve, and a positioning ring is fixed in the inner part of the front end of the outer sleeve; a plurality of turbulence columns are uniformly fixed at the front end of the flow guide column and pass through the positioning holes in the positioning ring. The flow guide column is arranged at the front end of the inner sleeve, and the turbulence column is arranged at the nozzle position, so that the mixing area is enlarged, the atomization effect of the natural gas on the ethylene tar is improved, the fuel and the combustion-supporting agent are fully mixed, the fuel utilization rate is improved, and the heat radiation effect in the furnace is improved.

Description

Technical Field

[0001] This invention relates to the field of glass production equipment technology, specifically a natural gas combustion nozzle for a large glass furnace. Background Technology

[0002] Solar energy technology, as one of the clean and efficient green energy technologies, has become the fastest-growing sector in the energy market. The production of solar energy equipment requires other supporting equipment, such as monocrystalline silicon solar cells and polycrystalline silicon solar cells. The cover glass used in these cells is generally made from solar rolled glass, which requires a glass furnace for production.

[0003] A combustion lance is installed in the furnace to maintain the furnace temperature and melt the glass raw materials by spraying fuel and combustion aid. Chinese patent CN115183236A discloses a gas-fired lance and its combustion system, as well as a configuration method for the combustion system of a float glass melting furnace. The gas-fired lance includes a gas nozzle, an outer tube, an inner tube, and a flow fine-tuning mechanism, enabling the safe and controllable combustion and heat release of a large flow of hydrogen. It also allows for adjustment of the flame state of hydrogen combustion, featuring a novel and unique design, a compact and simple structure, and easy manufacturing and installation. The gas-fired lance combustion system is composed of a hydrogen combustion assembly, a hydrogen delivery assembly, a cooling gas delivery assembly, and a gas distributor, including the gas-fired lance provided by this invention. This system, consisting of multiple hydrogen combustion components, can obtain enormous heat through a large flow of hydrogen, providing conditions for the large-scale use of hydrogen as a source of significant thermal energy.

[0004] The shortcomings of the above-mentioned gas spray gun structure are as follows: the inner nozzle is located inside the outer nozzle and is used to spray fuel and combustion aid respectively. The fuel and combustion aid only mix when they are sprayed out, resulting in insufficient and uneven atomization, inability to burn quickly and completely, and poor temperature raising effect; the outer nozzle is heated to a high temperature, is easily damaged, requires frequent maintenance and replacement, and is inconvenient to disassemble; in addition, the gas spray guns in the existing kilns operate continuously for a long time, which reduces the service life of the gas spray guns. Summary of the Invention

[0005] To address the shortcomings of the prior art, this invention provides a natural gas combustion lance for large glass furnaces.

[0006] The present invention adopts the following technical solution: a natural gas combustion nozzle for a large glass furnace, comprising an outer sleeve and an inner sleeve arranged coaxially, wherein a combustion aid connector is connected to the rear end of the outer sleeve and a fuel connector is connected to the rear end of the inner sleeve.

[0007] The inner sleeve has a guide column fixed inside the front end, and the guide column has an arc-shaped guide groove on its circumferential surface; the guide column has a blind hole at its front end, and a third guide hole on the guide column that connects the arc-shaped guide groove and the blind hole.

[0008] The inner sleeve has an inwardly contracting inner sleeve opening at the front end, and a second guide hole and a first guide hole are sequentially opened at the front end of the inner sleeve from front to back. The second guide hole and the first guide hole point to the arc-shaped guide groove on the guide column.

[0009] An arc-shaped protrusion is provided on the inner wall of the outer sleeve at a position radially opposite to the first guide hole, and the front part of the arc-shaped protrusion has an inwardly contracting outer sleeve opening;

[0010] The front end of the outer sleeve is fitted with a heat insulation sleeve, and a positioning ring is fixed inside the front end of the outer sleeve; the front end of the guide column is fixed with evenly distributed turbulence columns, and the positioning ring is provided with a through groove and a positioning hole, and the turbulence columns pass through the positioning holes on the positioning ring.

[0011] Preferably, an adjusting sleeve is provided between the rear end of the outer sleeve and the inner sleeve, and the adjusting sleeve is fitted onto the inner sleeve; the front end of the adjusting sleeve has an external thread, the rear end of the outer sleeve has an internal thread, and the rear end of the outer sleeve and the front end of the adjusting sleeve are connected by threads; a sealing ring is provided on the inner wall of the adjusting sleeve; a shaft retaining ring is fixed on the inner sleeve, and the front end of the adjusting sleeve abuts against the shaft retaining ring.

[0012] Preferably, the outer sleeve has an inner stop at its front end, and the positioning ring is installed in the inner stop of the outer sleeve; the front end of the heat insulation sleeve has a pressure sleeve, which is inserted into the inner stop of the outer sleeve and presses against the positioning ring; the rear end of the heat insulation sleeve is threadedly connected to the outer sleeve.

[0013] Preferably, the inner sleeve 2 has an internal thread at its front end, the guide column 3 has an external thread, the guide column 3 is connected to the front end of the inner sleeve 2 by a thread, the blind hole on the guide column is a regular hexagonal hole, and the turbulence column is welded to the front end of the guide column.

[0014] Preferably, the positioning ring has a regular hexagonal through hole of the same size as the blind hole at its axis.

[0015] Preferably, the through groove is a fan-shaped groove evenly opened on the outer ring of the positioning ring; the positioning hole is located on the inner ring of the positioning ring, and three rings of the positioning hole are opened around the center of the positioning hole; the turbulence column is arranged in three rings corresponding to the positioning hole, with the outer ring turbulence column inclined outward and the inner ring turbulence column inclined inward.

[0016] Preferably, the glass furnace has side chambers on both sides, a spray gun nozzle is provided below the side wall of the glass furnace, and an air outlet is provided above the side wall of the glass furnace; a sealing plate is provided in the side chamber opposite to the spray gun nozzle and the air outlet, and a linear motor is connected to the upper end of the sealing plate; a spray gun that cooperates with the spray gun nozzle and an exhaust device that cooperates with the air outlet are installed on the sealing plate.

[0017] When the spray gun and the nozzle are opposite each other on the sealing plate, the exhaust device and the air outlet are misaligned; when the exhaust device and the air outlet are opposite each other on the sealing plate, the spray gun and the nozzle are misaligned.

[0018] The beneficial effects of this invention are as follows: natural gas is used as a combustion aid to mix ethylene tar fuel; a guide column is set at the front end of the inner sleeve to divert the fuel and combustion aid to the inner and outer sleeves for mixing, thereby expanding the mixing area and improving the mixing effect; a turbulence column is set at the nozzle position, which vibrates under the impact of the mixed liquid, improving the spray atomization effect, ensuring that the fuel and combustion aid are fully mixed, and improving fuel utilization and kiln temperature; side chambers are set on both sides of the kiln, and through controllable sealing plates, fuel is injected into one side chamber while exhaust is performed in the other side chamber, which alternates periodically to avoid prolonged high-temperature operation of the spray gun and extend its service life. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of a natural gas combustion nozzle for a large glass furnace.

[0021] Figure 2 for Figure 1 Enlarged view of the central nozzle section.

[0022] Figure 3 for Figure 1 Enlarged view of point A in the middle.

[0023] Figure 4 This is a schematic diagram of the positioning ring.

[0024] Figure 5 This is a schematic diagram of the structure of a glass furnace.

[0025] Explanation of reference numerals in the attached drawings: 1. Outer sleeve; 101. Combustion accelerator connector; 102. Arc-shaped protrusion; 2. Inner sleeve; 201. Fuel connector; 202. Second guide hole; 203. First guide hole; 3. Guide column; 301. Arc-shaped guide groove; 302. Blind hole; 303. Third guide hole; 4. Heat insulation sleeve; 401. Pressure sleeve; 5. Positioning ring; 501. Through groove; 502. Positioning hole; 6. Baffle column; 7. Adjusting sleeve; 701. Sealing ring; 702. Shaft retaining ring; 8. Glass furnace; 801. Spray gun nozzle; 802. Air outlet; 9. Side chamber; 10. Sealing plate; 11. Linear motor; 12. Spray gun; 13. Exhaust device. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0027] Example 1

[0028] Combination Figure 1 As shown, a natural gas combustion lance for a large glass furnace includes an outer sleeve 1 and an inner sleeve 2 arranged coaxially. The rear end of the outer sleeve 1 is connected to a combustion accelerant connector 101, which is connected to a combustion accelerant, such as air, via a pipe. The rear end of the inner sleeve 2 is connected to a fuel connector 201, which is connected to fuel, such as natural gas or ethylene tar, via a pipe.

[0029] Combination Figure 1 and Figure 2 As shown, the inner sleeve 2 has an inwardly tapering inner cylinder opening at its front end, and the guide column 3 is threadedly connected to the front end of the inner sleeve 2. An arc-shaped guide groove 301 is formed on the circumferential surface of the guide column 3, and the rear end of the guide column 3 is tapered. A blind hole 302 is formed at the front end of the guide column 3, and a third guide hole 303 connecting the arc-shaped guide groove 301 and the blind hole 302 is formed on the guide column 3. From front to back, the front end of the inner sleeve 2 has a second guide hole 202 and a first guide hole 203 sequentially formed. The second guide hole 202 is located at the inner cylinder opening of the inner sleeve 2, and the first guide hole 203 is located at the columnar portion of the front end of the inner sleeve 2. The second guide hole 202 and the first guide hole 203 point towards the arc-shaped guide groove 301 on the guide column 3.

[0030] An arc-shaped protrusion 102 is provided on the inner wall of the outer sleeve 1 at a position radially opposite to the first guide hole 203. The front part of the arc-shaped protrusion 102 has an inwardly tapering outer sleeve opening. At the position of the arc-shaped protrusion 102 of the outer sleeve 1, a portion of the combustion improver enters the position of the arc-shaped guide groove 301 through the first guide hole 203, where the combustion improver and fuel undergo initial fusion. Then, a portion of the mixture enters the outer sleeve 1 through the second guide hole 202, and another portion of the mixture enters the blind hole 302 of the guide column 3 through the third guide hole 303, thus forming two mixing zones again.

[0031] Combined Figure 4As shown, the positioning ring 5 is located at the front end of the guide column 3 and is fixed inside the front end of the outer sleeve 1. The outer ring of the positioning ring 5 has evenly spaced fan-shaped through slots 501, and the inner ring has three rings of positioning holes 502 arranged around the center of the positioning hole 502. A regular hexagonal through hole is formed at the center of the positioning ring 5. The turbulence-inducing column 6 is welded to the front end of the guide column 3. The guide column 3 has three rings corresponding to the positioning holes 502, with the guide column 3 passing through the positioning holes 502. The outer ring of turbulence-inducing columns 6 is inclined outwards, the inner ring is inclined inwards, and the middle ring is parallel to the axis of the guide column 3. The blind hole 302 on the guide column 3 is a regular hexagonal hole of the same size as the central through hole of the positioning ring 5. When installing the guide column 3, a hex screwdriver is simultaneously passed through the positioning ring 5 and the guide column 3, causing them to rotate simultaneously, preventing the turbulence-inducing column 6 from disengaging from the positioning hole 502 of the positioning ring 5.

[0032] Combination Figure 1 and Figure 2 As shown, the outer sleeve 1 has an inner stop at its front end, and the positioning ring 5 is installed in the inner stop of the outer sleeve 1. The front end of the heat insulation sleeve 4 has an integrally formed pressure sleeve 401, which is inserted into the inner stop of the outer sleeve 1 and presses against the positioning ring 5 to achieve positioning of the positioning ring 5. The rear end of the heat insulation sleeve 4 is connected to the outer sleeve 1 by a thread, and the heat insulation sleeve 4 completely wraps around the front end of the outer sleeve 1, which can protect the outer sleeve 1 and prevent the outer sleeve 1 from overheating.

[0033] Combination Figure 1 and Figure 3 As shown, an adjusting sleeve 7 is provided between the rear end of the outer sleeve 1 and the inner sleeve 2, and the adjusting sleeve 7 is fitted onto the inner sleeve 2. The front end of the adjusting sleeve 7 has an external thread, and the rear end of the outer sleeve 1 has an internal thread. The rear end of the outer sleeve 1 and the front end of the adjusting sleeve 7 are connected by threads. A sealing ring 701 is provided on the inner wall of the adjusting sleeve 7, and a shaft retaining ring 702 is fixed on the inner sleeve 2. The front end of the adjusting sleeve 7 abuts against the shaft retaining ring 702. When the spray gun is working, under the impact of the combustion aid and fuel, the outer sleeve 1 will drive the adjusting sleeve 7 to abut against the shaft retaining ring 702 on the inner sleeve 2. Therefore, by adjusting the relative position of the outer sleeve 1 and the adjusting sleeve 7, the relative position of the front ends of the outer sleeve 1 and the inner sleeve 2 can be adjusted in the working state, thereby controlling the size of the nozzle and the opening and closing state of the turbulence column 6, and thus adjusting the optimal spray state of the mixture.

[0034] During operation, the combustion accelerator connector 101 connects to the combustion accelerator through a pipe, and the fuel connector 201 connects to the fuel through a pipe. At the arc-shaped protrusion 102 of the outer sleeve 1, a portion of the combustion accelerator enters the arc-shaped guide groove 301 through the first guide hole 203, where the combustion accelerator and fuel undergo initial fusion. Then, the first part of the mixture enters the outer sleeve 1 through the second guide hole 202, and the second part of the mixture enters the blind hole 302 of the guide column 3 through the third guide hole 303, forming two mixing zones again and expanding the mixing area. The first and second parts of the mixture mix in the turbulence column 6 and are sprayed outward. Under the action of the turbulence column 6, the atomization effect is further improved, ensuring that the fuel can burn completely.

[0035] Example 2

[0036] Based on the above embodiment one, and further combined with Figure 5 As shown, the glass furnace 8 has side chambers 9 on both sides. A spray nozzle 801 is located below the side wall of the glass furnace 8, and an air outlet 802 is located above the side wall of the glass furnace 8. A sealing plate 10 is installed in the side chamber 9, opposite to the spray nozzle 801 and the air outlet 802. A linear motor 11 is connected to the upper end of the sealing plate 10. A spray gun 12, which cooperates with the spray nozzle 801, and an exhaust device 13, which cooperates with the air outlet 802, are installed on the sealing plate 10. In this embodiment, the exhaust device 13 adopts a conventional design, and this embodiment is not limited to it.

[0037] When the linear motor 11 lowers the sealing plate 10, the spray gun 12 on the sealing plate 10 is aligned with the spray gun nozzle 801, and the exhaust device 13 is misaligned with the air outlet 802. At this time, the spray gun 12 is usable, but the exhaust device 13 does not exhaust. Similarly, when the linear motor 11 raises the sealing plate 10, the spray gun 12 on the sealing plate 10 is misaligned with the spray gun nozzle 801, and the exhaust device 13 is aligned with the air outlet 802. At this time, the spray gun 12 is unusable, but the exhaust device 13 begins to exhaust. During operation, the side chambers 9 on both sides alternately spray fuel and exhaust, thereby avoiding prolonged high-temperature operation of the spray gun and extending its service life.

[0038] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A natural gas combustion nozzle for a large glass furnace, comprising an outer sleeve (1) and an inner sleeve (2) arranged coaxially, wherein the rear end of the outer sleeve (1) is connected to a combustion aid connector (101) and the rear end of the inner sleeve (2) is connected to a fuel connector (201); Its features are: The inner sleeve (2) has a guide column (3) fixed inside the front end, and the guide column (3) has an arc-shaped guide groove (301) on its circumferential surface; the guide column (3) has a blind hole (302) at its front end, and the guide column (3) has a third guide hole (303) that connects the arc-shaped guide groove (301) and the blind hole (302); The inner sleeve (2) has an inwardly contracting inner sleeve opening at the front end. The front end of the inner sleeve (2) is provided with a second guide hole (202) and a first guide hole (203) from front to back. The second guide hole (202) and the first guide hole (203) point to the arc-shaped guide groove (301) on the guide column (3). An arc-shaped protrusion (102) is provided on the inner wall of the outer sleeve (1) at a position radially opposite to the first guide hole (203), and the front part of the arc-shaped protrusion (102) has an inwardly contracting outer sleeve opening; The outer sleeve (1) is fitted with a heat insulation sleeve (4) at the front end, and a positioning ring (5) is fixed inside the front end of the outer sleeve (1); the guide column (3) is fixed with evenly distributed turbulence columns (6) at the front end, and the positioning ring (5) is provided with a through groove (501) and a positioning hole (502), and the turbulence column (6) passes through the positioning hole (502) on the positioning ring (5).

2. The natural gas combustion lance for a large glass furnace according to claim 1, characterized in that: An adjusting sleeve (7) is provided between the rear end of the outer sleeve (1) and the inner sleeve (2), and the adjusting sleeve (7) is fitted onto the inner sleeve (2); the front end of the adjusting sleeve (7) is provided with an external thread, and the rear end of the outer sleeve (1) is provided with an internal thread, and the rear end of the outer sleeve (1) and the front end of the adjusting sleeve (7) are connected by threads; a sealing ring (701) is provided on the inner wall of the adjusting sleeve (7); a shaft retaining ring (702) is fixed on the inner sleeve (2), and the front end of the adjusting sleeve (7) abuts against the shaft retaining ring (702).

3. The natural gas combustion lance for a large glass furnace according to claim 1, characterized in that: The outer sleeve (1) has an inner stop at its front end, and the positioning ring (5) is installed in the inner stop of the outer sleeve (1); the heat insulation sleeve (4) has a pressure sleeve (401) at its front end, and the pressure sleeve (401) is inserted into the inner stop of the outer sleeve (1) and presses on the positioning ring (5); the rear end of the heat insulation sleeve (4) is connected to the outer sleeve (1) by a thread.

4. The natural gas combustion lance for a large glass furnace according to claim 1, characterized in that: The inner sleeve (2) has an internal thread at its front end, and the guide column (3) has an external thread. The guide column (3) is connected to the front end of the inner sleeve (2) by a thread. The blind hole (302) on the guide column (3) is a regular hexagonal hole. The turbulence column (6) is welded to the front end of the guide column (3).

5. A natural gas combustion lance for a large glass furnace according to claim 4, characterized in that: The positioning ring (5) has a regular hexagonal through hole of the same size as the blind hole (302) on its axis.

6. The natural gas combustion lance for a large glass furnace according to claim 1, characterized in that: The through groove (501) is a fan-shaped groove evenly opened on the outer ring of the positioning ring (5); the positioning hole (502) is located on the inner ring of the positioning ring (5), and three rings of the positioning hole (502) are opened around the center of the positioning hole (502); the turbulence column (6) is correspondingly matched with the positioning hole (502) in three rings, with the outer ring turbulence column (6) inclined outward and the inner ring turbulence column (6) inclined inward.

7. A natural gas combustion lance for a large glass furnace according to any one of claims 1 to 6, characterized in that: The glass furnace (8) has side chambers (9) on both sides, a spray gun nozzle (801) is provided below the side wall of the glass furnace (8), and an air outlet (802) is provided above the side wall of the glass furnace (8); a sealing plate (10) is provided in the side chamber (9) opposite to the spray gun nozzle (801) and the air outlet (802), and a linear motor (11) is connected to the upper end of the sealing plate (10); a spray gun (12) that cooperates with the spray gun nozzle (801) and an exhaust device (13) that cooperates with the air outlet (802) are installed on the sealing plate (10); When the spray gun (12) on the sealing plate (10) is opposite to the spray gun nozzle (801), the exhaust device (13) is offset from the air outlet (802); when the exhaust device (13) on the sealing plate (10) is opposite to the air outlet (802), the spray gun (12) is offset from the spray gun nozzle (801).

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