Burner for cement kilns

Abstract

The utility model discloses a kind of burners for cement kiln, applied in cement kiln burner technical field, including burner body, first support plate and second support plate, the top of feed pipe is fixedly connected with inlet pipe, the top of burner body is bolted with first motor, the output end of first motor is fixedly connected with driving gear, the tooth of driving gear is engaged with driven gear, the surface of stirring rod is welded with scattering blade, the bottom end of stirring rod is welded with adjusting disc, the top of adjusting disc is penetrated and is provided with adjusting groove, the utility model is set adjusting disc, adjusting groove etc., can make the flow of plastic residual film into burner body be controlled, by setting stirring rod and scattering blade, plastic residual film is conveniently scattered, avoid plastic residual film agglomeration, avoid blockage, reach the effect that it is helpful to system energy saving and consumption reduction and improve clinker calcination, ensure long-period stable operation of production.

Description

Technical Field

[0001] This utility model belongs to the technical field of cement kiln burners, and specifically relates to a burner for cement kilns. Background Technology

[0002] Cement rotary kilns belong to the category of building materials equipment and are a type of lime kiln. Rotary kilns can be classified into cement rotary kilns, metallurgical and chemical rotary kilns, and lime rotary kilns according to the materials they process. Cement rotary kilns are the main equipment in dry and wet process cement clinker production lines. The essence of a cement kiln burner is to mix fuel (such as coal, plastic film residue, etc.) with air and ignite it to provide heat for calcination inside the kiln.

[0003] The crushed plastic film is fed into the burner body and burned together with the coal. The heat generated during the combustion of the plastic film replaces the calorific value of the tail coal, completing the preheating of raw materials and the decomposition of limestone. Due to the high temperature inside the burner body, harmful gas emissions are close to zero, making it an environmentally friendly and economical fuel. Alkali metals and sulfur-containing substances in the plastic film can change the sulfur-alkali ratio in the clinker. Chloride ions circulate and accumulate in the preheater system, which can easily promote system scaling. Scaling in key areas reduces ventilation area, increases system resistance, affects the combustion effect of pulverized coal in the kiln head and decomposition furnace, and changes the temperature field inside the kiln. By adjusting the amount of plastic film added, the appropriate content of harmful components can be controlled, which helps the system save energy and reduce consumption and improve the clinker calcination effect. However, existing burners often lack a structure to adjust the amount of plastic film entering the system. In addition, the plastic film has low density, is prone to agglomeration and clogging, and is inconvenient for subsequent operations. Meanwhile, existing burners often cannot adjust the air volume of the air inlet pipe. If the air volume is insufficient when the plastic film is burning, it may lead to local oxygen deficiency, a decrease in the combustion rate, uneven heat release, and affect the stability of the burner body and the temperature field inside the kiln. If the air volume is too sufficient when the plastic film is burning, it may lead to an excessive amount of cold air (or insufficiently preheated air) entering the combustion zone, directly reducing the flame temperature and making subsequent operations inconvenient. Utility Model Content

[0004] The purpose of this utility model is to provide a burner for cement kilns, which has the advantage of being able to adjust the flow rate of plastic residue entering the burner body, and at the same time, being able to adjust the air volume entering the burner body from the air inlet pipe.

[0005] The above-mentioned technical objective of this utility model is achieved through the following technical solution: a burner for a cement kiln, comprising a burner body, a first support plate, and a second support plate. A base plate is welded to the surface of the burner body. One end of the burner body is fixedly connected to an air inlet pipe, and a baffle plate is provided inside the air inlet pipe. The other end of the burner body is fixedly connected to a nozzle pipe. A feed pipe is fixedly connected to the surface of the burner body, and an inlet pipe is fixedly connected to the top of the feed pipe. A first motor is bolted to the top of the burner body. A drive gear is fixedly connected to the output end of the first motor. A driven gear meshes with the teeth of the drive gear. A stirring rod is welded to the bottom of the driven gear. Dispersing blades are welded to the surface of the stirring rod. An adjusting plate is welded to the bottom end of the stirring rod. An adjusting groove is provided through the top of the adjusting plate. An air volume adjusting mechanism is provided on the opposite side of the first support plate and the second support plate.

[0006] The above technical solution enables control over the flow rate of plastic residue entering the burner body, facilitates the dispersal of the plastic residue, prevents its agglomeration, and avoids blockage.

[0007] The present invention is further configured such that the air volume adjustment mechanism includes a second motor, the surface of the second motor is bolted to the left side of the top of the first support plate, the output end of the second motor is fixedly connected to a worm gear, the surface of the worm gear is meshed with a worm wheel, the rear side of the worm wheel is welded to a first rotating rod, the front side of the second support plate is rotatably connected to a second rotating rod through a bearing, and the opposite sides of the first rotating rod and the second rotating rod are respectively welded to the surface of the wind deflector.

[0008] The above technical solution allows for the adjustment of the airflow into the burner body by setting an adjustment mechanism. An appropriate airflow ensures that the fuel and oxygen are in full contact, while avoiding excessive air dilution of heat.

[0009] The present invention is further configured such that a protective box is bolted to the top of the burner body, and the surface of the first motor is bolted to the inside of the protective box.

[0010] The above technical solution is adopted: by setting up a protective box, damage to the first motor can be avoided during use. The protective box is set as a metal mesh structure.

[0011] The present invention is further configured such that a shell is bolted to the top of the first support plate.

[0012] The above technical solution is adopted: by setting up an outer casing, the second motor, worm gear, worm wheel, etc. can be protected from damage. The surface of the outer casing is provided with heat dissipation holes to facilitate the dissipation of heat during the operation of the second motor.

[0013] The present invention is further configured such that a vertical plate is bolted to the right side of the top of the burner body, and an electric rod is bolted to the left side of the vertical plate.

[0014] The above technical solution involves setting up a vertical plate and an electric rod. When the electric rod is activated, it can limit the driven gear, preventing the driving gear and driven gear from rotating on their own, which would affect the rotation of the adjustment disc and make it difficult to control the amount of plastic film entering the disc.

[0015] The present invention is further provided that a rubber pad is adhered to the concave side of the base plate.

[0016] By adopting the above technical solution, the base plate may scratch the burner body, thus reducing the damage to the burner body caused by the base plate.

[0017] The present invention is further configured such that an anti-coking coating is sprayed onto the inner wall of the nozzle tube.

[0018] The above technical solution, by setting an anti-coking coating, not only achieves physical anti-adhesion, but also improves the stability and environmental friendliness of the combustion process through multiple mechanisms such as thermal management, corrosion protection and catalytic inhibition.

[0019] The present invention is further configured such that the adjusting groove is located directly below the feed pipe.

[0020] By adopting the above technical solution, by setting the adjustment groove directly below the feed pipe, the plastic residue can enter the burner body better through the adjustment groove when the adjustment plate is directly below the feed pipe during the rotation of the adjustment plate.

[0021] In summary, this utility model has the following beneficial effects: 1. This utility model, by setting up an adjusting plate and adjusting groove, enables the flow rate of plastic residue entering the burner body to be controlled. The addition of a stirring rod and dispersing blades facilitates the dispersion of the plastic residue, preventing agglomeration and clogging. This achieves the goals of energy saving, consumption reduction, improved clinker calcination effect, and stable long-term production operation. Ultimately, it achieves the objectives of cost reduction, efficiency improvement, energy conservation, and emission reduction. 2. By setting up an air volume adjustment mechanism, this utility model can adjust the flow rate of air entering the burner body. The appropriate air volume ensures that the fuel and oxygen are in full contact, while avoiding excessive air dilution of heat, thus achieving the effects of high-efficiency combustion, low-consumption operation and clean emissions. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a partial top view of the structure of this utility model; Figure 3 This is a partial structural cross-sectional view of the present invention; Figure 4 This is a partial structural front view of this utility model.

[0023] Reference numerals in the attached drawings: 1. Burner body; 2. First support plate; 3. Second support plate; 4. Base plate; 5. Air inlet pipe; 6. Baffle plate; 7. Nozzle pipe; 8. Feed pipe; 9. Feed inlet pipe; 10. First motor; 11. Drive gear; 12. Driven gear; 13. Stirring rod; 14. Dispersing blade; 15. Adjusting plate; 16. Adjusting groove; 17. Air volume adjustment mechanism; 1701. Second motor; 1702. Worm gear; 1703. Worm wheel; 1704. First rotating rod; 1705. Second rotating rod; 18. Protective box; 19. Outer shell; 20. Vertical plate; 21. Electric rod. Detailed Implementation

[0024] The present invention will be further described in detail below with reference to the accompanying drawings.

[0025] Example 1: refer to Figure 1 , Figure 2 , Figure 3 and Figure 4 A burner for a cement kiln includes a burner body 1, a first support plate 2, and a second support plate 3. A base plate 4 is welded to the surface of the burner body 1. An air inlet pipe 5 is fixedly connected to one end of the burner body 1. A baffle plate 6 is installed inside the air inlet pipe 5. A nozzle pipe 7 is fixedly connected to the other end of the burner body 1. A feed pipe 8 is fixedly connected to the surface of the burner body 1. A feed inlet pipe 9 is fixedly connected to the top of the feed pipe 8. A first motor 10 is bolted to the top of the burner body 1. A drive gear 11 is fixedly connected to the output end of the first motor 10. A driven gear 12 meshes with the teeth of the drive gear 11. A stirring rod 13 is welded to the bottom of the driven gear 12. A dispersing blade 14 is welded to the surface of the stirring rod 13. An adjusting plate 15 is welded to the bottom end of the stirring rod 13. An adjusting groove 16 is opened through the top of the adjusting plate 15, which allows the flow rate of plastic residue entering the burner body 1 to be controlled, making it easier to disperse the plastic residue, avoid the plastic residue from agglomerating, and avoid clogging.

[0026] refer to Figure 1 A protective box 18 is bolted to the top of the burner body 1, and the surface of the first motor 10 is bolted to the inside of the protective box 18. By setting the protective box 18, damage to the first motor 10 during use can be avoided. The protective box 18 is set as a metal mesh structure.

[0027] refer to Figure 1 and Figure 3A vertical plate 20 is bolted to the right side of the top of the burner body 1, and an electric rod 21 is bolted to the left side of the vertical plate 20. By setting the vertical plate 20 and the electric rod 21, when the electric rod 21 is started, the driven gear 12 can be limited to prevent the driving gear 11 and the driven gear 12 from rotating on their own, thereby affecting the rotation of the regulating plate 15 and making it impossible to control the amount of plastic residue entering.

[0028] refer to Figure 1 A rubber pad is bonded to the concave side of the base plate 4. By setting the rubber pad, the base plate 4 may scratch the burner body 1, which can reduce the damage of the base plate 4 to the burner body 1.

[0029] refer to Figure 1 The inner wall of the nozzle tube 7 is coated with an anti-coking coating. By setting the anti-coking coating, not only is physical adhesion prevented, but also the stability and environmental friendliness of the combustion process are improved through multiple mechanisms such as thermal management, corrosion protection and catalytic inhibition.

[0030] refer to Figure 4 The adjustment groove 16 is located directly below the feed pipe 9. By setting the adjustment groove 16 directly below the feed pipe 9, the plastic residue can enter the burner body 1 better through the adjustment groove 16 when the adjustment plate 15 is located directly below the feed pipe 9 during rotation.

[0031] Brief description of the operation: Start the first motor 10, which drives the drive gear 11 to rotate. The drive gear 11 drives the driven gear 12 to rotate, which in turn causes the stirring rod 13 to rotate. The stirring rod 13 drives the adjusting plate 15 to rotate. During the rotation of the adjusting plate 15, the adjusting groove 16 passes directly below the feed pipe 9. At this time, the plastic residue entering from the feed pipe 9 will enter the burner body 1 through the adjusting groove 16. When the adjusting plate 15 rotates and the adjusting groove 16 deviates from the feed pipe 9, the plastic residue entering from the feed pipe 9 will not fall into the burner body 1, but will fall onto the adjusting plate 15. During the rotation of the stirring rod 13, the dispersing blade 14 rotates. During the rotation, the dispersing blade 14 will continue to disperse the plastic residue, preventing it from agglomerating and clogging.

[0032] Example 2: refer to Figure 1 A burner for a cement kiln has an air volume regulating mechanism 17 on one side opposite to the first support plate 2 and the second support plate 3. This mechanism can regulate the flow rate of air entering the burner body 1, ensuring that the fuel and oxygen are in full contact.

[0033] refer to Figure 2The airflow regulating mechanism 17 includes a second motor 1701. The surface of the second motor 1701 is bolted to the left side of the top of the first support plate 2. The output end of the second motor 1701 is fixedly connected to a worm gear 1702. The surface of the worm gear 1702 is meshed with a worm wheel 1703. A first rotating rod 1704 is welded to the rear side of the worm wheel 1703. A second rotating rod 1705 is rotatably connected to the front side of the second support plate 3 through a bearing. The opposite sides of the first rotating rod 1704 and the second rotating rod 1705 are respectively welded to the surface of the baffle plate 6. By setting the regulating mechanism, the flow rate of airflow into the burner body 1 can be adjusted. The appropriate airflow ensures that the fuel and oxygen are in full contact, while avoiding excessive air dilution of heat.

[0034] refer to Figure 1 The top of the first support plate 2 is bolted with a housing 19. By setting the housing 19, the second motor 1701, worm gear 1702, worm wheel 1703 and other components can be protected from damage. The surface of the housing 19 is provided with heat dissipation holes to facilitate the dissipation of heat during the operation of the second motor 1701.

[0035] The burner body 1 is selected as the LNB-5000 low-NOx burner, which adopts staged combustion + flue gas recirculation (FGR) technology, with a thermal power of 5000kW and NOx emissions ≤200mg / Nm³, meeting environmental protection standards.

[0036] Brief description of the usage process: Start the second motor 1701, which drives the worm gear 1702 to rotate. The worm gear 1702 drives the worm wheel 1703 to rotate, which causes the first rotating rod 1704 to rotate. With the cooperation of the second rotating rod 1705, the wind deflector 6 rotates.

[0037] It should be noted that parts have a lifespan and can be replaced during regular maintenance when they no longer meet performance requirements. Deterioration in performance due to prolonged use of parts is not a design defect of this application.

[0038] This specific embodiment is merely an explanation of the present utility model and is not intended to limit the present utility model. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but as long as they are within the scope of the claims of the present utility model, they are protected by patent law.

Claims

1. A burner for a cement kiln, comprising a burner body (1), a first support plate (2), and a second support plate (3), characterized in that: A base plate (4) is welded to the surface of the burner body (1). One end of the burner body (1) is fixedly connected to an air inlet pipe (5). A baffle plate (6) is installed inside the air inlet pipe (5). The other end of the burner body (1) is fixedly connected to a nozzle pipe (7). A feed pipe (8) is fixedly connected to the surface of the burner body (1). A feed pipe (9) is fixedly connected to the top of the feed pipe (8). A first motor (10) is bolted to the top of the burner body (1). The output end is fixedly connected to a drive gear (11), and a driven gear (12) meshes with the teeth of the drive gear (11). A stirring rod (13) is welded to the bottom of the driven gear (12), and a dispersing blade (14) is welded to the surface of the stirring rod (13). An adjusting plate (15) is welded to the bottom end of the stirring rod (13), and an adjusting groove (16) is opened through the top of the adjusting plate (15). An air volume adjusting mechanism (17) is provided on the opposite side of the first support plate (2) and the second support plate (3).

2. The burner for a cement kiln according to claim 1, characterized in that: The air volume adjustment mechanism (17) includes a second motor (1701), the surface of which is bolted to the left side of the top of the first support plate (2). The output end of the second motor (1701) is fixedly connected to a worm gear (1702), the surface of which is meshed with a worm wheel (1703). A first rotating rod (1704) is welded to the rear side of the worm wheel (1703). A second rotating rod (1705) is rotatably connected to the front side of the second support plate (3) through a bearing. The opposite sides of the first rotating rod (1704) and the second rotating rod (1705) are respectively welded to the surface of the wind deflector (6).

3. A burner for a cement kiln according to claim 1, characterized in that: A protective box (18) is bolted to the top of the burner body (1), and the surface of the first motor (10) is bolted to the inside of the protective box (18).

4. A burner for a cement kiln according to claim 2, characterized in that: The top of the first support plate (2) is bolted with a housing (19).

5. A burner for a cement kiln according to claim 1, characterized in that: A vertical plate (20) is bolted to the right side of the top of the burner body (1), and an electric rod (21) is bolted to the left side of the vertical plate (20).

6. A burner for a cement kiln according to claim 1, characterized in that: A rubber pad is bonded to the concave side of the base plate (4).

7. A burner for a cement kiln according to claim 1, characterized in that: The inner wall of the nozzle tube (7) is coated with an anti-coking coating.

8. A burner for a cement kiln according to claim 1, characterized in that: The adjustment groove (16) is located directly below the feed pipe (9).

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