A kiln tail preheater with multi-layer spray gun arrangement

Abstract

The utility model discloses a kiln tail preheater with a multi-layer spray gun arrangement, comprising an L-shaped bracket and a plurality of independently controlled spray guns, wherein the bracket is provided with a vertically distributed horizontal plate and a vertical plate; the upper surface of the horizontal plate of the bracket is connected to a first cylinder, the first cylinder is arranged in a manner that the axis is parallel to the horizontal plate, and the output end of the first cylinder is away from the vertical plate; the output end of the first cylinder is connected to the spray gun through a connecting plate, the spray gun is also slidably connected to the vertical plate of the bracket, and the spray end of the spray gun is located on the side where the vertical plate is located; a rotating shaft is provided at the end of the lower surface of the horizontal plate of the bracket, the rotating shaft of the bracket is rotatably connected to a base, the upper surface of the base is connected to a second cylinder, the output end of the second cylinder is connected to a glass bead bolt, and the glass beads of the glass bead bolt are in contact with the lower surface of the horizontal plate of the bracket; the water inlet ends of the plurality of spray guns are all connected to an electric control valve.

Description

Technical Field

[0001] The utility model belongs to the technical field of preheaters, and in particular relates to a kiln tail preheater with a multi-layer spray gun arrangement. Background Art

[0002] The kiln tail preheater sprays ammonia denitrification through a spray gun to reduce harmful substances in the flue gas flow.

[0003] However, the existing spray guns of the kiln tail preheater are collectively controlled and cannot be individually finely controlled, which leads to low utilization rate and low denitrification efficiency after the spray gun sprays ammonia, and is prone to ammonia escape and large ammonia water consumption, which is not conducive to production. Utility Model Content

[0004] In view of the problems raised by the above background technology, the purpose of the utility model is to provide a kiln tail preheater with a multi-layer spray gun arrangement.

[0005] In order to achieve the above technical purpose, the technical solution adopted by the utility model is as follows:

[0006] A kiln tail preheater with a multi-layer spray gun arrangement, comprising an L-shaped bracket and a plurality of independently controlled spray guns, wherein the bracket is provided with vertically distributed horizontal plates and vertical plates;

[0007] The upper surface of the horizontal plate of the bracket is connected to a first cylinder, the first cylinder is arranged in a manner that the axis is parallel to the horizontal plate, and the output end of the first cylinder is away from the vertical plate;

[0008] The output end of the first cylinder is connected to the spray gun through a connecting plate, and the spray gun is also slidably connected to the vertical plate of the bracket, and the spray end of the spray gun is located on the side where the vertical plate is located;

[0009] A rotating shaft is provided at the end of the lower surface of the horizontal plate of the bracket, the rotating shaft of the bracket is rotatably connected to the base, the upper surface of the base is connected to the second cylinder, the output end of the second cylinder is connected to the glass bead bolt, and the glass bead of the glass bead bolt contacts the lower surface of the horizontal plate of the bracket;

[0010] The water inlet ends of the plurality of spray guns are all connected to an electric control valve.

[0011] It is further defined that the vertical plate of the bracket is installed with a linear bearing for sliding cooperation with the spray gun. With such a structural design, the linear bearing is used to support the spray gun while reducing the resistance of the spray gun movement through rolling friction.

[0012] It is further defined that the connecting plate is provided with a first through hole and a second through hole, the output end of the first cylinder passes through the first through hole and is locked by a nut, and the fixed end of the spray gun passes through the second through hole and is locked by a nut. In such a structural design, the first through hole is used to install the output end of the first cylinder, and the second through hole is used to install the fixed end of the spray gun, both of which are locked by nuts.

[0013] It is further defined that the spray end of the spray gun is connected to a high temperature resistant nozzle. Such a structural design can increase the service life of the high temperature resistant nozzle in the preheater.

[0014] It is further defined that two rotating seats are provided on the upper surface of the base, the rotating seats are connected to ball bearings, and the rotating shaft is connected to the inner ring of the ball bearings. With such a structural design, the rotating seats and ball bearings realize the rotating connection between the rotating shaft of the bracket and the base.

[0015] It is further defined that the upper surface of the base is provided with a groove for placing the second cylinder, and the groove is provided with a long waist hole. With such a structural design, the groove is used to position the second cylinder, and the long waist hole is used to lock the bolt of the second cylinder. The long waist hole reduces the difficulty of installation and allows the installation position of the second cylinder to be changed within a certain range.

[0016] The beneficial effects of the utility model are as follows: the spray gun can be controlled individually to achieve refined control of the spray gun, the reducing agent ammonia solution sprayed from the spray gun is injected into the flue gas flow, the reducing agent reacts with nitric oxide and nitrogen dioxide to generate nitrogen and water, and the utility model achieves the purpose of improving denitrification efficiency, reducing ammonia water consumption, and reducing ammonia escape by independently controlling the spray gun and adjusting the spray position and spray amount. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention can be further described by the non-limiting embodiments given in the accompanying drawings;

[0018] Figure 1 It is a structural schematic diagram of an embodiment of a kiln tail preheater with a multi-layer spray gun arrangement according to the utility model;

[0019] Figure 2 It is a structural schematic diagram of a base in an embodiment of a kiln tail preheater with a multi-layer spray gun arrangement according to the utility model;

[0020] Figure 3 It is a structural schematic diagram of the second cylinder and the glass bead bolt in an embodiment of a kiln tail preheater with a multi-layer spray gun arrangement of the utility model;

[0021] The main component symbols are described as follows:

[0022] 1. Bracket;

[0023] 2. First cylinder;

[0024] 3. Connecting plate;

[0025] 4. Spray gun;

[0026] 5. Linear bearings;

[0027] 6. High temperature resistant nozzle;

[0028] 7. Base; 72. Rotating seat; 73. Groove; 74. Long waist hole;

[0029] 8. Second cylinder;

[0030] 9. Glass bead bolts. DETAILED DESCRIPTION

[0031] In order to enable those skilled in the art to better understand the present invention, the technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0032] like Figure 1-3 As shown, a kiln tail preheater with a multi-layer spray gun arrangement of the utility model comprises an L-shaped bracket 1 and a plurality of independently controlled spray guns 4, wherein the bracket 1 is provided with vertically distributed horizontal plates and vertical plates;

[0033] The upper surface of the horizontal plate of the bracket 1 is connected to the first cylinder 2, and the first cylinder 2 is arranged in a manner that the axis is parallel to the horizontal plate, and the output end of the first cylinder 2 is away from the vertical plate;

[0034] The output end of the first cylinder 2 is connected to the spray gun 4 through the connecting plate 3. The spray gun 4 is also slidably connected to the vertical plate of the bracket 1. The spray end of the spray gun 4 is located on the side where the vertical plate is located.

[0035] A rotating shaft is provided at the end of the lower surface of the horizontal plate of the bracket 1, and the rotating shaft of the bracket 1 is rotatably connected to the base 7. The upper surface of the base 7 is connected to the second cylinder 8, and the output end of the second cylinder 8 is connected to the glass bead bolt 9. The glass bead of the glass bead bolt 9 contacts the lower surface of the horizontal plate of the bracket 1.

[0036] The water inlet ends of the plurality of spray guns 4 are all connected to an electric control valve.

[0037] In this embodiment:

[0038] The water inlet end of each spray gun 4 is connected to an electric control valve, which is used to adjust the amount of ammonia water fed into the spray gun 4 to avoid waste of ammonia water. In areas where ammonia water is in high demand, the opening of the electric control valve of the corresponding spray gun 4 becomes larger, and in areas where ammonia water is in low demand, the opening of the electric control valve of the corresponding spray gun 4 becomes smaller. The ammonia water with a reducing effect is injected into the flue gas flow, and the ammonia water reacts with nitric oxide and nitrogen dioxide to generate nitrogen and water.

[0039] In order to improve the utilization rate of ammonia water and the denitrification efficiency, the spray gun 4 is configured to be able to extend and retract and adjust the pitch angle, so as to deliver the sprayed ammonia water to the area where the flue gas is concentrated and the reaction temperature is qualified. Specifically, the spray gun 4 is slidably connected to the vertical plate of the bracket 1. The spray gun 4 can move forward or backward along the axial direction under the drive of the first cylinder 2, thereby adjusting the spray point position of the spray gun 4. In order to adjust the pitch angle of the spray gun 4, the bracket 1 is rotatably connected to the base 7 through a rotating shaft, and the second cylinder 8 serves as a power source for driving the bracket 1 to rotate around the rotating shaft. When the output end of the second cylinder 8 moves upward, the glass bead bolt 9 pushes the bracket 1 and the spray gun 4 upward, and the spray point of the spray gun 4 is downward. When the output end of the second cylinder 8 moves downward, the bracket 1 and the spray gun 4 move downward under the action of their own gravity, and the spray point of the spray gun 4 is lifted upward. The glass beads of the glass bead bolt 9 are in contact with the lower surface of the horizontal plate of the bracket 1, and the glass beads realize the relative movement of the glass bead bolt 9 and the bracket 1 by their own rolling.

[0040] Preferably, the vertical plate of the bracket 1 is equipped with a linear bearing 5 for slidingly cooperating with the spray gun 4. With this structural design, the linear bearing 5 is used to support the spray gun 4 while reducing the resistance of the spray gun 4 to movement through rolling friction. In fact, other sliding connection structures between the spray gun 4 and the vertical plate can also be considered according to specific circumstances.

[0041] Preferably, the connecting plate 3 is provided with a first through hole and a second through hole, the output end of the first cylinder 2 passes through the first through hole and is locked by a nut, and the fixed end of the spray gun 4 passes through the second through hole and is locked by a nut. In this structural design, the first through hole is used to install the output end of the first cylinder 2, and the second through hole is used to install the fixed end of the spray gun 4, both of which are locked by nuts. In fact, other matching structures of the first cylinder 2, the spray gun 4 and the connecting plate 3 can also be considered according to specific circumstances.

[0042] Preferably, the spray end of the spray gun 4 is connected to the high temperature resistant nozzle 6. Such a structural design can increase the service life of the high temperature resistant nozzle 6 in the preheater. In fact, other structural shapes that increase the service life of the spray end can also be considered according to specific circumstances.

[0043] Preferably, two rotating seats 72 are provided on the upper surface of the base 7, the rotating seats 72 are connected to the ball bearings, and the rotating shaft is connected to the inner ring of the ball bearings. With this structural design, the rotating seats 72 and the ball bearings realize the rotating connection between the rotating shaft of the bracket 1 and the base 7. In fact, other rotating structures of the base 7 can also be considered according to specific circumstances.

[0044] Preferably, the upper surface of the base 7 is provided with a groove 73 for placing the second cylinder 8, and a long waist hole 74 is provided in the groove 73. With this structural design, the groove 73 is used to position the second cylinder 8, and the long waist hole 74 is used to lock the bolts of the second cylinder 8. The long waist hole 74 reduces the difficulty of installation and allows the installation position of the second cylinder 8 to be changed within a certain range. In fact, other installation structures of the second cylinder 8 can also be considered according to specific circumstances.

[0045] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the relevant technical field without departing from the spirit and technical ideas disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. A kiln tail preheater with multi-layer spray gun arrangement, characterized in that: It comprises an L-shaped support (1) and a plurality of independently controlled spray guns (4), wherein the support (1) is provided with a vertically distributed horizontal plate and a vertical plate; The upper surface of the horizontal plate of the bracket (1) is connected to a first cylinder (2), the first cylinder (2) is arranged in a manner such that the axis is parallel to the horizontal plate, and the output end of the first cylinder (2) is away from the vertical plate; The output end of the first cylinder (2) is connected to a spray gun (4) via a connecting plate (3); the spray gun (4) is also slidably connected to a vertical plate of the bracket (1); and the spray end of the spray gun (4) is located on the side where the vertical plate is located; A rotating shaft is provided at the end of the lower surface of the horizontal plate of the bracket (1), the rotating shaft of the bracket (1) is rotatably connected to the base (7), the upper surface of the base (7) is connected to the second cylinder (8), the output end of the second cylinder (8) is connected to a glass bead bolt (9), and the glass bead of the glass bead bolt (9) is in contact with the lower surface of the horizontal plate of the bracket (1); The water inlet ends of the plurality of spray guns (4) are all connected to an electric control valve.

2. The kiln tail preheater with multi-layer spray gun arrangement according to claim 1, characterized in that: The vertical plate of the bracket (1) is provided with a linear bearing (5) for slidingly cooperating with the spray gun (4).

3. The kiln tail preheater with multi-layer spray gun arrangement according to claim 2, characterized in that: The connecting plate (3) is provided with a first through hole and a second through hole, the output end of the first cylinder (2) passes through the first through hole and is locked by a nut, and the fixed end of the spray gun (4) passes through the second through hole and is locked by a nut.

4. The kiln tail preheater with multi-layer spray gun arrangement according to claim 3, characterized in that: The spray end of the spray gun (4) is connected to a high temperature resistant nozzle (6).

5. The kiln tail preheater with multi-layer spray gun arrangement according to claim 4, characterized in that: Two rotating seats (72) are provided on the upper surface of the base (7), the rotating seats (72) are connected to ball bearings, and the rotating shaft is connected to the inner ring of the ball bearings.

6. The kiln tail preheater with multi-layer spray gun arrangement according to claim 4, characterized in that: The upper surface of the base (7) is provided with a groove (73) for placing the second cylinder (8), and a long waist hole (74) is provided in the groove (73).

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