Float glass kiln nozzle brick protection device

Abstract

The utility model discloses a float glass kiln nozzle brick protection device which comprises a nozzle brick, a spray gun and a fire blocking ring, the nozzle brick is provided with a horn mouth with a small front part and a large rear part, the spray gun comprises a spray gun main body and a spray gun head, and a spray channel communicated with the spray gun main body is arranged in the spray gun head. The outer peripheral wall of the spray gun head comprises a front peripheral wall, a middle peripheral wall and a rear peripheral wall, the outer diameters of the front peripheral wall, the middle peripheral wall and the rear peripheral wall are sequentially increased, a step is formed between the middle peripheral wall and the rear peripheral wall, the middle peripheral wall is provided with an external thread, the fire blocking ring is of an annular body structure and is provided with an internal thread connected with the middle peripheral wall in a matched mode, and the fire blocking ring is of a hollow structure. The rear end face of the fire blocking ring is a plane and can be limited on a step between the middle peripheral wall and the rear peripheral wall, and the front end face of the fire blocking ring is an arc-shaped face. The depth position of the spray gun is fixed through the fire blocking ring, a spread angle formed by flames sprayed by the spray gun and the nozzle brick is also fixed along with the fire blocking ring, and meanwhile the sealing performance of the nozzle brick is improved.

Description

Technical Field

[0001] The utility model relates to a float glass kiln nozzle brick protection device. Background Art

[0002] The melting furnace is one of the three major thermal equipment of glass production enterprises. It is directly related to the quality and output of the products produced, and is also the main guarantee for the normal operation of production. In the production of melting furnaces, the nozzle brick is an important part of the melting furnace structure. It is a channel for the spray gun to shoot atomized heavy oil into the kiln to mix with the combustion air. It is directly in contact with the spray gun head for use. Because the nozzle brick is located at the position of the flame mouth, it is easy to be burned by direct contact with the flame. In the process of switching, it is in an alternating hot and cold environment, and it is easy to burst due to the temperature difference. At present, the nozzle brick is a trumpet-shaped structure, such as Figure 1 As shown, the shape of the flame sprayed from the spray gun also has a certain diffusion angle. The depth of the spray gun determines the degree of contact between the diffusion angle of the flame and the nozzle brick to a certain extent. When the spray gun is installed off-center, the diffusion angle of the flame directly contacts the nozzle brick and directly burns the nozzle brick. When the spray gun is installed off-center, the burner is easily damaged in the high temperature of the melting furnace. Furthermore, the sealing between the spray gun and the nozzle brick currently in use is not good enough. Affected by the change of fire and the hot and cold air inside and outside, the nozzle brick is easy to burst. Therefore, the depth of the spray gun installation and the sealing have a vital relationship with the degree of burning of the nozzle brick. Utility Model Content

[0003] The utility model provides a nozzle brick protection device for a float glass kiln, which solves the problem of hot and cold alternation in the process of nozzle rotation and the protection problem of nozzle bricks in the combustion process, fixes the depth position of the spray gun, avoids the problem of burning the nozzle bricks due to too large a flame diffusion angle, increases the service life of the nozzle bricks, reduces the defects caused by the burning of the nozzle bricks and affects the glass quality, thereby improving the glass quality.

[0004] The technical solution adopted by the utility model to solve its technical problems is:

[0005] A float glass furnace nozzle brick protection device comprises a nozzle brick, a spray gun and a fire stop ring, wherein the nozzle brick has a bell mouth which is small in front and large in the back, the spray gun comprises a spray gun body and a spray gun head, the interior of the spray gun head has a jet channel connected to the spray gun body, the outer peripheral wall of the spray gun head comprises a front peripheral wall, an intermediate peripheral wall and a rear peripheral wall whose outer diameters increase successively, a step is formed between the intermediate peripheral wall and the rear peripheral wall, the intermediate peripheral wall is provided with an external thread, the fire stop ring is an annular body structure, the fire stop ring has an internal thread which is adapted to be connected with the intermediate peripheral wall, the rear end face of the fire stop ring is a plane and can be limited on the step between the intermediate peripheral wall and the rear peripheral wall, the front end face of the fire stop ring is an arcuate face, and the front end face of the fire stop ring can be closely abutted against the front end face of the bell mouth of the nozzle brick.

[0006] In another preferred embodiment, the fire-blocking ring has a thickness of 14 mm, an outer diameter of 90 mm, and an inner diameter of 50 mm.

[0007] The beneficial effect of the utility model is that, by designing a fire-blocking ring connected to the spray gun head, the depth position of the spray gun is fixed, and the diffusion angle formed by the flame sprayed from the spray gun and the nozzle brick is also fixed accordingly, while the sealing of the nozzle brick is increased, the temperature around the nozzle brick mouth is maintained, the temperature difference caused by the alternation of hot and cold during the fire changing process is reduced, the service life of the nozzle brick is increased, and the risk of the nozzle brick bursting is reduced.

[0008] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments; however, the float glass furnace nozzle brick protection device of the present invention is not limited to the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a cross-sectional view of a spray gun according to a preferred embodiment of the utility model.

[0010] Figure 2 It is a cross-sectional view of a spray gun head according to a preferred embodiment of the utility model.

[0011] Figure 3 It is a cross-sectional view of a fire baffle ring according to a preferred embodiment of the utility model.

[0012] Figure 4 yes Figure 2 The spray gun head and Figure 3 Cross-sectional view of the fire baffle ring installed together.

[0013] Figure 5 It is a structural schematic diagram of a spray gun of a preferred embodiment of the utility model applied to a glass kiln.

[0014] Figure 6 This is a schematic diagram of the structure of a glass kiln before improvement. DETAILED DESCRIPTION

[0015] For example, see Figures 1 to 5As shown, a float glass furnace nozzle brick protection device of the utility model comprises a nozzle brick 1, a spray gun 2 and a fire stop ring 3, wherein the nozzle brick 1 has a bell mouth which is small in front and large in the back, the spray gun 2 comprises a spray gun body 21 and a spray gun head 22, the interior of the spray gun head 22 comprises a jet channel 221 connected to the spray gun body, the outer peripheral wall of the spray gun head 22 comprises a front peripheral wall 222, a middle peripheral wall 223 and a rear peripheral wall 224 whose outer diameters increase successively, a step is formed between the middle peripheral wall 223 and the rear peripheral wall 224, the middle peripheral wall 223 is provided with an external thread, the fire stop ring 3 is an annular body structure, the fire stop ring has an internal thread 31 which is adapted to be connected with the middle peripheral wall 223, the rear end face 32 of the fire stop ring 3 can be limited on the step between the middle peripheral wall 223 and the rear peripheral wall 224, the front end face 33 of the fire stop ring 3 is an arcuate face, and the front end face 33 of the fire stop ring 3 can be closely abutted against the front end face of the bell mouth 11 of the nozzle brick 1.

[0016] The fire stop ring 3 of the present embodiment has a thickness of 14 mm, an outer diameter of 90 mm, and an inner diameter of 50 mm. The fire stop ring 3 is threadedly engaged with the spray gun head 22 and rests on the nozzle brick 1, so that the spray gun 2 has a support point, thereby fixing the depth position of the spray gun 2. The flame diffusion angle of the spray gun 2 is also fixed, which can provide sealing protection for the nozzle brick 1 during the fire change, reduce the temperature difference between the inside and the outside that causes the nozzle brick 1 to burst during use, reduce the occurrence of combustion defects, and improve the quality of glass production.

[0017] The usage process of this embodiment is as follows:

[0018] ① Screw the fire baffle ring 3 made of 316 stainless steel into the spray gun head 22 with an outer thread of M50;

[0019] ② After placing the spray gun 2 equipped with the fire-blocking ring 3 against the nozzle brick 1 of the small furnace in the regenerator, adjust the burning angle of the spray gun 2 to 13-16°, fix the gun holder nut, connect the powder hose metal hose and the atomizing air pipe at the tail end of the spray gun, and ventilate and pass powder at the same time to meet the combustion conditions;

[0020] ③ After changing the fire, the melter is responsible for checking whether the spray gun 2 to be used has leakage and checking the angle, depth and concentricity of the spray gun: the angle is required to be 13-16°, the depth is controlled at about 25mm, and the concentricity is maintained in the center of the nozzle brick.

[0021] ④ After confirming that the spray gun is correct, as the reversing procedure proceeds, after the combustion-supporting air atomization gas is in place, the coal injection valve of the coke powder system is opened, and the conveying gas transports the coke powder to the front of the gun and sprays it into the kiln to form a flame;

[0022] ⑤ The flame in the kiln heats and melts the batch materials through heat radiation to form transparent, pure, uniform glass liquid suitable for molding.

[0023] like Figure 6 As shown, when the spray gun 2' is not equipped with a fire-blocking ring, the spray gun is mounted on the nozzle brick, and a certain gap can be clearly seen between the two. In this state, the sealing around the nozzle brick is poor, and the temperature around the nozzle brick mouth cannot be maintained when changing the fire. This disadvantage increases the temperature difference caused by the alternation of hot and cold during the fire change process, greatly reducing the life of the nozzle brick. Another disadvantage is that as the spray gun is used, it is inevitable that the gun stand will become loose, the flame diffusion angle will become larger, the nozzle brick will be burned, and combustion defects will occur.

[0024] This embodiment installs a fire-blocking ring on the spray gun to fix its depth position, thereby fixing the flame diffusion angle of the spray gun, avoiding excessive diffusion angle caused by the spray gun being installed too close to the outside, and long-term direct flame blowing on the nozzle brick, which greatly reduces the service life of the nozzle brick. At the same time, increasing the sealing of the nozzle brick and maintaining the temperature around the nozzle brick mouth can reduce the temperature difference caused by the alternation of hot and cold during the fire change process, increase the service life of the nozzle brick, and reduce the risk of nozzle brick cracking. It is also low in cost, economical and effective, and has significant effects. On the one hand, it improves the quality of glass and effectively reduces combustion defects; on the other hand, it reduces manpower and material resources, controls the cost of use, and reduces the workload of employees in replacing nozzle bricks for a long time. It also conforms to the concept of energy saving and consumption reduction.

[0025] In actual operation, the service life of nozzle bricks without fire retaining rings is 1 year. After installing the fire retaining rings, the service life can be extended to 2.5 years, thereby extending the replacement time by 1.5 years, which can greatly save the cost of nozzle bricks.

[0026] The above embodiments are only used to further illustrate a float glass furnace nozzle brick protection device of the present invention, but the present invention is not limited to the embodiments. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention fall within the protection scope of the technical solution of the present invention.

Claims

1. A float glass furnace nozzle brick protection device, characterized in that: It includes a nozzle brick, a spray gun and a fire-blocking ring. The nozzle brick has a bell-shaped mouth with a small front and a large rear. The spray gun includes a spray gun body and a spray gun head. The interior of the spray gun head has an injection channel connected to the spray gun body. The outer peripheral wall of the spray gun head includes a front peripheral wall, an intermediate peripheral wall and a rear peripheral wall with outer diameters increasing successively. A step is formed between the intermediate peripheral wall and the rear peripheral wall. The intermediate peripheral wall is provided with an external thread. The fire-blocking ring is an annular structure. The fire-blocking ring has an internal thread that is adapted to be connected to the intermediate peripheral wall. The rear end face of the fire-blocking ring is a plane and can be limited on the step between the intermediate peripheral wall and the rear peripheral wall. The front end face of the fire-blocking ring is an arc-shaped face. The front end face of the fire-blocking ring can be closely abutted against the front end face of the bell-shaped mouth of the nozzle brick.

2. A float glass furnace nozzle brick protection device according to claim 1, characterized in that: The fire-blocking ring has a thickness of 14 mm, an outer diameter of 90 mm and an inner diameter of 50 mm.

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