Protective device for hot end of burner of rotary kiln

Abstract

The utility model belongs to the technical field of mineral and metallurgical equipment, and particularly discloses a rotary kiln burner hot end protection device which comprises a burner hot end, a plurality of anchoring nails are arranged on the outer wall of the burner hot end, castable is poured on the outer wall of the burner hot end, a semi-arc-shaped hot end protection lining is arranged on the castable, and the semi-arc-shaped hot end protection lining is arranged on the outer wall of the burner hot end. The thickness of the top of the hot end protection lining is larger than that of the two sides of the edge of the hot end protection lining, a plurality of protection lining square holes are formed in the two sides of the hot end protection lining, and a plurality of bolt holes are formed in the middle of the hot end protection lining. The hot end protection lining is fixed to the top of the hot end of the combustor through the bolt holes and the stainless steel special-shaped studs. After the hot end protection lining is installed, when the formed ring falls from the top, the hot end protection lining on the upper portion of the combustor can effectively protect the hot end of the combustor in the rotary kiln from being impacted and damaged by the formed ring falling from the rotary kiln, and the formed ring is effectively prevented from directly hitting the hot end of the combustor.

Description

Technical Field

[0001] The utility model belongs to the technical field of mineral and metallurgical equipment, and particularly relates to a hot-end protection device for a rotary kiln burner. Background Art

[0002] The pellet rotary kiln of our unit uses pulverized coal as fuel. During the production process, due to poor drying and preheating effects of green pellets and low ash melting point of pulverized coal, the situation of rotary kiln ring formation will occur. When the rings at the kiln head part fall off and are discharged, it is easy to damage the burner at the kiln head part of the rotary kiln, resulting in damage to the hot end of the burner, inability to spray coal normally, and causing accident shutdown.

[0003] Therefore, it is necessary to design a hot-end protection device for a rotary kiln burner, which can effectively prevent the burner from being damaged and reduce the equipment failure rate. Summary of the Utility Model

[0004] Aiming at the problems of the prior art, the purpose of the utility model is to provide a hot-end protection device for a rotary kiln burner to solve the problems that when the rings at the kiln head part fall off and are discharged, it is easy to damage the burner at the kiln head part of the rotary kiln, resulting in damage to the hot end of the burner, inability to spray coal normally, and causing accident shutdown.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A hot-end protection device for a rotary kiln burner, including the hot end of the burner. A plurality of anchor bolts are arranged on the outer wall of the hot end of the burner, and a castable is poured on the outer wall of the hot end of the burner. A semi-circular hot-end protection lining is arranged on the castable.

[0007] More preferably, the thickness of the top of the hot-end protection lining is greater than the thickness of the two edges on both sides.

[0008] More preferably, a plurality of bolt holes are arranged on the hot-end protection lining.

[0009] More preferably, a plurality of stainless steel special-shaped studs are arranged on the hot end of the burner.

[0010] More preferably, the hot-end protection lining is fixed on the top of the hot end of the burner through bolt holes and stainless steel special-shaped studs.

[0011] More preferably, a plurality of protection lining square holes are arranged on both sides of the hot-end protection lining.

[0012] More preferably, the material of the hot-end protection lining is alloy heat-resistant cast steel.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] 1. A hot-end protection device for a rotary kiln burner provided by the utility model mainly installs a heat-resistant cast steel protection lining on the top of the original hot end of the burner. When the ring falls from the top and lands within the range of the middle burner, the protection lining above the burner can effectively protect the hot-end part of the internal burner of the rotary kiln from being damaged by the impact of the ring falling from the rotary kiln, effectively preventing the ring from directly hitting the burner, eliminating the main equipment failure points of the burner, and extending the service life of the rotary kiln burner.

[0015] 2. The overall shape of the protection lining of this utility model is semi-circular arc. The impact force is the highest at the top, and the impact forces on both sides are smaller. Therefore, the thickness of the top of the hot-end protection lining is greater than that of the two edges on both sides, which can meet the impact of the ring on the protection lining.

[0016] 3. A number of protection lining square holes are provided on both sides of the upper part of the protection lining of this utility model. The protection lining square holes can dissipate heat better and can also prevent the stress from not being released and deforming when the protection lining is heated during production.

[0017] 4. The protection lining of this utility model is divided into several pieces for installation and is bolted to the upper part of the burner, which is convenient for its installation and later maintenance and replacement. Description of the Drawings

[0018] Figure 1 It is the side view of the installation of the utility model on the upper part of the hot end of the burner;

[0019] Figure 2 It is the installation schematic diagram of the utility model on the upper part of the hot end of the burner;

[0020] Figure 3 It is the developed view of the hot-end protection lining of the utility model;

[0021] Figure 4 It is the schematic diagram of the position of the utility model inside the rotary kiln;

[0022] The meanings of the reference numerals are as follows: 1. Hot-end protection lining; 2. Hot end of the burner; 3. Castable; 4. Stainless steel special-shaped stud; 5. Anchor nail; 6. Bolt hole; 7. Protection lining square hole; 8. Ring. Detailed Implementation Modes

[0023] In order to make the purpose, technical solutions and advantages of the utility model clearer, the following further details the utility model in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model and are not used to limit the utility model.

[0024] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model. In addition, in the description of the present utility model, the meaning of "several" is more than two, unless otherwise specifically defined.

[0025] As Figures 1-4 shown, a hot-end protection device for a rotary kiln burner includes a hot-end protection lining 1. According to the calculation of the falling range of the ring in the rotary kiln of our unit, the overall length of the hot-end protection lining 1 is 2000 mm. For the convenience of installing and replacing the protection lining, it is designed as 4 pieces in total, and each piece has a length of 500 mm. On both sides of the hot-end protection lining 1, 4 groups of protection lining square holes 7 with an arc length of 378 mm and a width of 40 mm are designed. The center distance between two holes is 100 mm and they are evenly arranged, which can dissipate heat and prevent the stress of the hot-end protection lining 1 from not being released and deforming during production due to heat. The place with the highest impact force on the hot-end protection lining 1 is the top, and the impact force on both sides is smaller. The thickness of the top of the hot-end protection lining 1 is greater than the thickness of the two edges on both sides. The thickness of the two edges on both sides of the hot-end protection lining 1 is designed to be 30 mm, and the thickness of the top of the hot-end protection lining 1 is designed to be 55 mm, which can fully meet the impact of the ring 8 on the hot-end protection lining 1. The material of the hot-end protection lining 1 is alloy heat-resistant cast steel, and the heat-resistant temperature reaches 1250 °C.

[0026] A number of bolt holes 6 are provided on the hot-end protection lining 1, and the bolt holes 6 are evenly arranged at a distance of 260 mm. A number of stainless steel special-shaped studs 4 are welded on the upper part of the hot-end 2 of the burner according to the positions of the bolt holes 6, and the stainless steel special-shaped studs 4 and the bolt holes 6 are connected by bolts, so as to fix the hot-end protection lining 1 on the hot-end 2 of the burner. Bolting is convenient for its installation and later maintenance and replacement. A number of anchor nails 5 are fixed on the outer wall of the hot-end 2 of the burner to form a mold for pouring the hot-end 2 of the burner. When pouring, the casting material 3 should also be embedded in the protection lining square holes 7.

[0027] When the present utility model is specifically used, a hot-end protection lining 1 is installed on the top of the original hot-end 2 of the burner. When the ring 8 falls from the top to the range of the middle hot-end 2 of the burner, the hot-end protection lining 1 on the top of the hot-end 2 of the burner can effectively protect the hot-end 2 of the burner in the rotary kiln from being damaged by the ring 8 falling from the rotary kiln, and effectively prevent the ring 8 from directly hitting the hot-end 2 of the burner.

[0028] The above is only the preferred embodiment of the present utility model, and it is not used to limit the present utility model. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A rotary kiln burner hot end protection device, comprising a burner hot end, characterized in that: The outer wall of the burner hot end (2) is provided with a plurality of anchoring nails (5), the outer wall of the burner hot end (2) is cast with a casting material (3), and a semicircular arc-shaped hot end protective lining (1) is provided on the casting material (3).

2. A rotary kiln burner hot end protection device according to claim 1, characterized in that: The top thickness of the hot end protection lining (1) is greater than the thickness on both sides of the edge.

3. The rotary kiln burner hot end protection device according to claim 1, characterized in that: The hot end protective liner (1) is provided with a plurality of bolt holes (6).

4. A rotary kiln burner hot end protection device according to claim 1, characterized in that: A plurality of stainless steel special-shaped studs (4) are provided on the hot end (2) of the burner.

5. The rotary kiln burner hot end protection device according to claim 1, characterized in that: The hot end protective liner (1) is fixed to the top of the burner hot end (2) through bolt holes (6) and stainless steel special-shaped studs (4).

6. The rotary kiln burner hot end protection device according to claim 1, characterized in that: A plurality of protective liner square holes (7) are provided on both sides of the hot end protective liner (1).

7. The rotary kiln burner hot end protection device according to claim 1, characterized in that: The hot end protection lining (1) is made of alloy heat-resistant cast steel.

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