Novel fireproof structure for rotary kiln

Abstract

The utility model relates to the technical field of rotary kilns, and discloses a novel fire-resistant structure for a rotary kiln, which comprises a limit hoop, a first rotary kiln steel shell and a second rotary kiln steel shell are arranged at the front end and the rear end in the limit hoop, and heat-resistant plates are arranged on the inner side walls of the first rotary kiln steel shell and the second rotary kiln steel shell. According to the novel fire-resistant structure for the pellet rotary kiln and the circular cooler, the fire-resistant bricks, the grooves and the convex blocks are arranged, and the fire-resistant bricks are sealed through the grooves and the convex blocks, so that permeation and invasion of hot air can be reduced as much as possible, heat loss is reduced to the maximum extent, and energy conservation and consumption reduction can be achieved; the service life of the first rotary kiln steel shell and the service life of the second rotary kiln steel shell can be prolonged, the refractory bricks have the advantage of being high in abrasion resistance, the refractory bricks are resistant to fire and preserve heat, and the problems that the sealing performance between the refractory bricks is poor, and the service life of the rotary kiln steel shells is prone to being affected are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of rotary kilns, in particular to a novel refractory structure for a rotary kiln. Background Art

[0002] A rotary kiln refers to a rotating calcining kiln (commonly known as a rotary kiln). A rotary kiln belongs to the category of building materials equipment. According to the materials it processes, it can be divided into cement kilns, metallurgical chemical kilns, and lime kilns. Rotary kilns are widely used in the production of building materials (such as cement, wall ceramsite), ore calcination and roasting in ferrous metallurgy, non-ferrous metal aluminum and magnesium raw materials, petrochemicals, and volume reduction and harmless treatment of waste in the field of environmental protection. Refractory structures are required when using rotary kilns.

[0003] There are still some problems with the new refractory structures used in common pelletizing rotary kilns and ring coolers. For example, refractory bricks are arranged inside the rotary kiln, and the sealing between the refractory bricks is poor, which easily affects the service life of the steel shell of the rotary kiln. The refractory bricks and the shell have no thermal insulation effect, which is not conducive to energy saving and consumption reduction.

[0004] Therefore, we proposed a new refractory structure for rotary kiln to improve the above problems. Utility Model Content

[0005] The utility model aims to provide a new refractory structure for a rotary kiln to solve the problem in the above background technology that the sealing between refractory bricks is poor, which easily affects the service life of the rotary kiln steel shell and is not convenient to reduce the surface temperature of the shell to achieve energy saving and consumption reduction.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a new type of refractory structure for a rotary kiln, comprising a limiting hoop, a first rotary kiln steel shell and a second rotary kiln steel shell are arranged at the front and rear ends inside the limiting hoop, the inner side walls of the first rotary kiln steel shell and the second rotary kiln steel shell are provided with a heat-resistant plate, the inner side walls of the heat-resistant plate are provided with refractory bricks, a groove is provided on one side of the refractory brick, and a protrusion is fixedly connected to the other side of the refractory brick.

[0007] Preferably, the refractory bricks are provided in a plurality of groups, and the refractory bricks are respectively distributed in a ring shape inside the first rotary kiln steel shell and the second rotary kiln steel shell.

[0008] Preferably, the axially and radially adjacent refractory bricks of the first rotary kiln steel shell and the second rotary kiln steel shell all have grooves and protrusions, and the refractory bricks are sealed by the grooves and protrusions.

[0009] Preferably, the front ends of the first rotary kiln steel shell and the second rotary kiln steel shell are respectively fixedly connected with mounting blocks, the rear ends of the first rotary kiln steel shell and the second rotary kiln steel shell are respectively provided with reserved grooves, the inner side walls of the reserved grooves are provided with sealing gaskets, the inner side walls of the limiting clamps are fixedly connected with thermal insulation cotton, and the thermal insulation cotton is arranged on the outside of the connection between the first rotary kiln steel shell and the second rotary kiln steel shell.

[0010] Preferably, the mounting block is embedded in the reserved groove, and the sealing gasket is arranged between the mounting block and the reserved groove.

[0011] Preferably, the limiting clamp is fixedly connected to a first connecting block at the top end near the middle, and the limiting clamp is fixedly connected to a second connecting block at the bottom end near the middle, and mounting holes are respectively provided inside the second connecting block and the first connecting block, and mounting bolts are provided inside the mounting holes, and a spring washer is provided on the left side of the outside of the mounting bolt, and a fixing nut is provided on the right side of the outside of the mounting bolt, and a rubber pad is provided between the fixing nut and the first connecting block, and a support block is fixedly connected to one side of the bottom end of the limiting clamp near the outside.

[0012] Preferably, the first connecting block and the second connecting block are fixed by mounting bolts and fixing nuts respectively, and the mounting bolts and fixing nuts cooperate with each other.

[0013] Preferably, rolling grooves are respectively formed at the bottom ends of the second connecting block and the supporting block, and balls are arranged inside the rolling grooves.

[0014] Compared with the prior art, the utility model has the following beneficial effects: the new refractory structure for the rotary kiln not only realizes the improvement of the sealing between the refractory bricks, realizes the convenience of making the joints refractory, but also realizes the convenience of making the rotary kiln steel shell spliced ​​and fixed;

[0015] (1) By providing refractory bricks, grooves and protrusions, since the refractory bricks are sealed by the grooves and protrusions, the penetration of hot air can be reduced as much as possible, and the heat loss can be minimized, which can not only save energy and reduce consumption, but also extend the service life of the first rotary kiln steel shell and the second rotary kiln steel shell. In addition, the refractory bricks have the advantage of high wear resistance. The refractory bricks are both fire-resistant and heat-insulating. The refractory bricks are compositely cut with heat-insulating cotton;

[0016] (2) By providing thermal insulation cotton, a mounting block, a reserved groove and a sealing gasket, the mounting block at the front end of the first rotary kiln steel shell is embedded in the reserved groove, and the sealing gasket on the inner side wall of the reserved groove can increase the sealing between the mounting block and the reserved groove, thereby preventing the heat inside the first rotary kiln steel shell and the second rotary kiln steel shell from being dissipated through the connection. The sealing gasket is a refractory material, and the thermal insulation cotton on the inner side wall of the limit clamp can further improve the fire resistance of the connection;

[0017] (3) By providing a support block, a first connecting block, a rolling groove, a rubber pad and a spring gasket, when the limit clamp is installed on the outer wall of the connection between the first rotary kiln steel shell and the second rotary kiln steel shell, the limit clamp is pushed to make the limit clamp close to the connection. The ball inside the rolling groove can facilitate the user to push the limit clamp. After pushing it to a suitable position, the mounting bolt is screwed into the inside of the mounting hole to fix the second connecting block and the first connecting block respectively, so that the limit clamp can be fixed to the outside of the connection between the first rotary kiln steel shell and the second rotary kiln steel shell. The fixing nut and the spring gasket can prevent the mounting bolt from accidentally detaching from the inside of the mounting hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a front view cross-sectional structural schematic diagram of the utility model;

[0019] Figure 2 It is a schematic diagram of a partial cross-sectional structure of the utility model in a side view;

[0020] Figure 3 This is a schematic diagram of the side structure of the position limiting clamp of the utility model;

[0021] Figure 4 For the utility model Figure 1 Schematic diagram of the enlarged cross-section structure at point A in the middle.

[0022] In the figure: 1. limit clamp; 2. support block; 3. first rotary kiln steel shell; 4. thermal insulation cotton; 5. heat-resistant plate; 6. refractory brick; 7. groove; 8. protrusion; 9. first connecting block; 10. fixing nut; 11. ball; 12. rolling groove; 13. rubber pad; 14. second connecting block; 15. second rotary kiln steel shell; 16. mounting block; 17. reserved groove; 18. sealing pad; 19. spring gasket; 20. mounting bolt; 21. mounting hole. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] Example 1: Please refer to Figure 1-4A new type of refractory structure for a rotary kiln includes a limiting hoop 1, a first rotary kiln steel shell 3 and a second rotary kiln steel shell 15 are arranged at the front and rear ends of the limiting hoop 1, a heat-resistant plate 5 is arranged on the inner side wall of the first rotary kiln steel shell 3 and the second rotary kiln steel shell 15, a refractory brick 6 is arranged on the inner side wall of the heat-resistant plate 5, a groove 7 is opened on one side of the refractory brick 6, and a protrusion 8 is fixedly connected to the other side of the refractory brick 6;

[0025] Multiple groups of refractory bricks 6 are provided. The refractory bricks 6 are respectively distributed in an annular shape inside the first rotary kiln steel shell 3 and the second rotary kiln steel shell 15. The axially and radially adjacent refractory bricks 6 of the first rotary kiln steel shell 3 and the second rotary kiln steel shell 15 are provided with grooves 7 and protrusions 8. The refractory bricks 6 are sealed by the grooves 7 and the protrusions 8.

[0026] Specifically, Figure 1 and Figure 3 As shown, since the refractory bricks 6 are sealed by the grooves 7 and the protrusions 8, the penetration of hot air can be reduced as much as possible, and the heat loss can be minimized, which can not only save energy and reduce consumption, but also extend the service life of the first rotary kiln steel shell 3 and the second rotary kiln steel shell 15. The refractory bricks 6 have the advantage of high wear resistance, and the refractory bricks 6 are both fire-resistant and heat-insulating.

[0027] Embodiment 2: The front ends of the first rotary kiln steel shell 3 and the second rotary kiln steel shell 15 are respectively fixedly connected with a mounting block 16, and the rear ends of the first rotary kiln steel shell 3 and the second rotary kiln steel shell 15 are respectively provided with a reserved groove 17, and the inner side wall of the reserved groove 17 is provided with a sealing gasket 18, and the inner side wall of the limiting clamp 1 is fixedly connected with a thermal insulation cotton 4, and the thermal insulation cotton 4 is arranged outside the connection between the first rotary kiln steel shell 3 and the second rotary kiln steel shell 15, and the mounting block 16 is embedded in the reserved groove 17, and the sealing gasket 18 is arranged between the mounting block 16 and the reserved groove 17;

[0028] Specifically, Figure 1 and Figure 2 As shown, the mounting block 16 at the front end of the first rotary kiln steel shell 3 is embedded in the reserved groove 17, and the sealing gasket 18 on the inner wall of the reserved groove 17 can increase the sealing between the mounting block 16 and the reserved groove 17 to prevent the heat inside the first rotary kiln steel shell 3 and the second rotary kiln steel shell 15 from dissipating through the connection. The sealing gasket 18 is a refractory material, and the thermal insulation cotton 4 on the inner wall of the limiting clamp 1 can further improve the fire resistance of the connection.

[0029] Embodiment 3: The top end of the limiting clamp 1 near the middle is fixedly connected with the first connecting block 9, and the bottom end of the limiting clamp 1 near the middle is fixedly connected with the second connecting block 14, and the second connecting block 14 and the first connecting block 9 are respectively provided with mounting holes 21, and the mounting holes 21 are provided with mounting bolts 20, and the left side of the outside of the mounting bolts 20 is provided with spring washers 19, and the right side of the outside of the mounting bolts 20 is provided with fixing nuts 10, and a rubber pad 13 is provided between the fixing nuts 10 and the first connecting block 9. The bottom end of the limiting clamp 1 is fixedly connected with the supporting block 2 near the outside, and the first connecting block 9 and the second connecting block 14 are respectively fixed by mounting bolts 20 and fixing nuts 10, and the mounting bolts 20 and fixing nuts 10 cooperate with each other, and the bottom ends of the second connecting block 14 and the supporting block 2 are respectively provided with rolling grooves 12, and the rolling grooves 12 are provided with balls 11;

[0030] Specifically, Figure 1 , Figure 3 and Figure 4 As shown, when the limit clamp 1 is installed on the outer wall of the connection between the first rotary kiln steel shell 3 and the second rotary kiln steel shell 15, the limit clamp 1 is pushed to make the limit clamp 1 close to the connection. The ball 11 inside the rolling groove 12 can facilitate the user to push the limit clamp 1. After pushing it to a suitable position, the mounting bolt 20 is screwed into the inside of the mounting hole 21 to fix the second connecting block 14 and the first connecting block 9 respectively, so that the limit clamp 1 can be fixed to the outside of the connection between the first rotary kiln steel shell 3 and the second rotary kiln steel shell 15. The fixing nut 10 and the spring washer 19 can prevent the mounting bolt 20 from accidentally detaching from the inside of the mounting hole 21.

[0031] Working principle: When the utility model is in use, the mounting block 16 at the front end of the first rotary kiln steel shell 3 is embedded in the reserved groove 17. The sealing gasket 18 on the inner wall of the reserved groove 17 can increase the sealing between the mounting block 16 and the reserved groove 17 to prevent the heat inside the first rotary kiln steel shell 3 and the second rotary kiln steel shell 15 from dissipating through the connection. The sealing gasket 18 is a refractory material. The heat-insulating cotton 4 on the inner wall of the limiting clamp 1 can further improve the fire resistance of the connection. When the limiting clamp 1 is installed on the outer wall of the connection between the first rotary kiln steel shell 3 and the second rotary kiln steel shell 15, the limiting clamp 1 is pushed to the connection. The ball 11 inside the rolling groove 12 can facilitate the user to push the limiting clamp 1. After pushing it to the appropriate position, the mounting bolt 20 is screwed into the mounting hole 21 to fix the second connecting block 14 and the first connecting block 9 respectively, so that the limiting clamp 1 can be fixed to the outside of the connection between the first rotary kiln steel shell 3 and the second rotary kiln steel shell 15. Since the refractory bricks 6 are sealed by the groove 7 and the protrusion 8, the penetration of hot air can be reduced as much as possible, and the heat loss can be minimized, which can not only save energy and reduce consumption, but also prolong the service life of the first rotary kiln steel shell 3 and the second rotary kiln steel shell 15.

[0032] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A novel refractory structure for a rotary kiln, comprising a limiting clamp (1), characterized in that: A first rotary kiln steel shell (3) and a second rotary kiln steel shell (15) are arranged at the front and rear ends of the interior of the limiting clamp (1); the inner side walls of the first rotary kiln steel shell (3) and the second rotary kiln steel shell (15) are provided with a heat-resistant plate (5); the inner side walls of the heat-resistant plate (5) are provided with a refractory brick (6); a groove (7) is provided on one side of the refractory brick (6); and a protrusion (8) is fixedly connected to the other side of the refractory brick (6).

2. The novel refractory structure for a rotary kiln according to claim 1, characterized in that: The refractory bricks (6) are arranged in a plurality of groups, and the refractory bricks (6) are respectively distributed in a ring shape inside the first rotary kiln steel shell (3) and the second rotary kiln steel shell (15).

3. The novel refractory structure for a rotary kiln according to claim 1, characterized in that: The axially and radially adjacent refractory bricks (6) of the first rotary kiln steel shell (3) and the second rotary kiln steel shell (15) both have grooves (7) and protrusions (8), and the refractory bricks (6) are sealed by the grooves (7) and the protrusions (8).

4. The novel refractory structure for a rotary kiln according to claim 1, characterized in that: The front ends of the first rotary kiln steel shell (3) and the second rotary kiln steel shell (15) are respectively fixedly connected with mounting blocks (16); the rear ends of the first rotary kiln steel shell (3) and the second rotary kiln steel shell (15) are respectively provided with reserved grooves (17); the inner side walls of the reserved grooves (17) are provided with sealing gaskets (18); the inner side walls of the limiting clamp (1) are fixedly connected with thermal insulation cotton (4); and the thermal insulation cotton (4) is provided outside the connection between the first rotary kiln steel shell (3) and the second rotary kiln steel shell (15).

5. The novel refractory structure for a rotary kiln according to claim 4, characterized in that: The mounting block (16) is embedded in the reserved groove (17), and the sealing gasket (18) is arranged between the mounting block (16) and the reserved groove (17).

6. The novel refractory structure for a rotary kiln according to claim 1, characterized in that: The limiting clamp (1) is fixedly connected to a first connection block (9) at the top end near the middle, and the limiting clamp (1) is fixedly connected to a second connection block (14) at the bottom end near the middle. The second connection block (14) and the first connection block (9) are respectively provided with mounting holes (21) inside. A mounting bolt (20) is provided inside the mounting hole (21). A spring washer (19) is provided on the left side of the outside of the mounting bolt (20). A fixing nut (10) is provided on the right side of the outside of the mounting bolt (20). A rubber pad (13) is provided between the fixing nut (10) and the first connection block (9). The bottom end of the limiting clamp (1) is fixedly connected to a support block (2) on one side near the outside.

7. The novel refractory structure for a rotary kiln according to claim 6, characterized in that: The first connecting block (9) and the second connecting block (14) are fixed by means of mounting bolts (20) and fixing nuts (10) respectively, and the mounting bolts (20) and fixing nuts (10) cooperate with each other.

8. The novel refractory structure for a rotary kiln according to claim 6, characterized in that: The second connecting block (14) and the supporting block (2) are respectively provided with rolling grooves (12) at their bottom ends, and rolling balls (11) are arranged inside the rolling grooves (12).

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