Energy-saving and heat-preserving structure of rotary kiln

Abstract

This utility model discloses an energy-saving and heat-insulating structure for a rotary kiln, including a rotary kiln connecting cylinder. The inner surface of the connecting cylinder is provided with a first heat-resistant sealing layer. Inside the first heat-resistant sealing layer is a first refractory layer, inside the first refractory layer is a second heat-resistant sealing layer, inside the second heat-resistant sealing layer is a third heat-resistant sealing layer, inside the third heat-resistant sealing layer is a second refractory layer, and inside the second refractory layer is a fourth heat-resistant sealing layer. The outer surface of the rotary kiln connecting cylinder is provided with a heat-insulating pad, which is an aerogel felt layer. Both the first and second refractory layers are formed by multiple refractory bricks. The first heat-resistant sealing layer is a nano-composite ceramic coating. This utility model, through the arrangement of the first, second, third, and fourth heat-resistant sealing layers, achieves excellent heat-resistant sealing, thereby preventing heat loss and improving the heat insulation effect.

Description

Technical Field

[0001] This utility model relates to the field of rotary kiln technology, and in particular to an energy-saving and heat-insulating structure for rotary kilns. Background Technology

[0002] Currently, during the operation of rotary kilns, a large amount of heat is lost due to heat conduction between the high-temperature flue gas and the kiln body. This not only reduces thermal efficiency and increases energy consumption, but also causes the outer wall temperature of the kiln body to be too high, posing a safety hazard and potentially causing thermal pollution to the surrounding environment. Therefore, insulation structures are installed on the kiln body to ensure the energy-saving operation of the rotary kiln.

[0003] Among them, a search revealed that Chinese patent CN223153978U discloses an energy-saving insulation structure for rotary kilns. However, in the application of the above-mentioned patent's technical solution, the insulation structure does not provide good insulation for the rotary kiln shell, which affects the energy-saving use of the rotary kiln. Therefore, in order to better realize the insulation function of the rotary kiln shell, promote technological progress in the industry, and improve the core technology competitiveness, this application proposes a new implementation scheme for the rotary kiln shell insulation structure that is different from the existing technology. Utility Model Content

[0004] The purpose of this invention is to solve the problem of poor insulation effect of existing insulation structures on rotary kiln cylinders, and to propose an energy-saving insulation structure for rotary kilns.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An energy-saving and heat-insulating structure for a rotary kiln includes a rotary kiln connecting cylinder. The inner surface of the rotary kiln connecting cylinder is provided with a first heat-resistant sealing layer. The inner side of the first heat-resistant sealing layer is provided with a first refractory layer. The inner side of the first refractory layer is provided with a second heat-resistant sealing layer. The inner side of the second heat-resistant sealing layer is provided with a third heat-resistant sealing layer. The inner side of the third heat-resistant sealing layer is provided with a second refractory layer. The inner side of the second refractory layer is provided with a fourth heat-resistant sealing layer.

[0007] Furthermore, the outer surface of the rotary kiln connecting cylinder is provided with a heat insulation pad, which is an aerogel felt layer.

[0008] Furthermore, both the first and second refractory layers are formed by assembling multiple refractory bricks.

[0009] Furthermore, the first heat-resistant sealing layer is a nano-composite ceramic coating.

[0010] Furthermore, the second heat-resistant sealing layer is a ZS-1 high-temperature heat-insulating coating.

[0011] Furthermore, the third heat-resistant sealing layer is an RLHY-1201 fire-resistant and heat-insulating coating.

[0012] Furthermore, the fourth heat-resistant sealing layer is a ceramic fiber coating.

[0013] The beneficial effects of this utility model are as follows:

[0014] 1. The combination of the first, second, third, and fourth heat-resistant sealing layers creates an excellent heat-resistant sealing layer, thereby preventing heat loss and improving the insulation effect.

[0015] 2. The rotary kiln connecting cylinder has dual refractory properties due to the first and second refractory layers constructed from multiple refractory bricks.

[0016] 3. The use of aerogel felt layer in the insulation pad prevents the external temperature from affecting the temperature inside the kiln, thus achieving a heat insulation effect. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of an energy-saving and heat-insulating structure for a rotary kiln proposed in this utility model;

[0018] Figure 2 This is a cross-sectional front view schematic diagram of an energy-saving and heat-insulating structure for a rotary kiln proposed in this utility model;

[0019] Figure 3 This is an enlarged structural diagram of point A of the energy-saving and heat-insulating structure of a rotary kiln proposed in this utility model;

[0020] Figure 4 This is a partially exploded cross-sectional view of an energy-saving and heat-insulating structure for a rotary kiln proposed in this utility model.

[0021] In the diagram: 1. Rotary kiln connecting cylinder; 2. First heat-resistant sealing layer; 3. First refractory layer; 4. Second heat-resistant sealing layer; 5. Third heat-resistant sealing layer; 6. Second refractory layer; 7. Fourth heat-resistant sealing layer; 8. Thermal insulation pad; 9. Refractory brick. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] Reference Figures 1-4An energy-saving and heat-insulating structure for a rotary kiln includes a rotary kiln connecting cylinder 1. The inner surface of the rotary kiln connecting cylinder 1 is provided with a first heat-resistant sealing layer 2. The inner side of the first heat-resistant sealing layer 2 is provided with a first refractory layer 3. The inner side of the first refractory layer 3 is provided with a second heat-resistant sealing layer 4. The inner side of the second heat-resistant sealing layer 4 is provided with a third heat-resistant sealing layer 5. The inner side of the third heat-resistant sealing layer 5 is provided with a second refractory layer 6. The inner side of the second refractory layer 6 is provided with a fourth heat-resistant sealing layer 7.

[0024] The first refractory layer 3 and the second refractory layer 6 are both formed by multiple refractory bricks 9. The first refractory layer 3 and the second refractory layer 6, which are formed by multiple refractory bricks 9, give the rotary kiln connecting cylinder 1 dual refractory performance.

[0025] The first heat-resistant sealing layer 2 is a nano-composite ceramic coating. The nano-composite ceramic coating fills the gap between the first refractory layer 3 and the inner wall of the rotary kiln connecting cylinder 1 through the first heat-resistant sealing layer 2, forming a continuous sealing film to prevent heat from leaking from the gap between the brick body and the rotary kiln connecting cylinder 1.

[0026] The second heat-resistant sealing layer 4 is a ZS-1 high-temperature heat-insulating coating. The ZS-1 high-temperature heat-insulating coating in the second heat-resistant sealing layer 4 provides good thermal shock resistance.

[0027] The third heat-resistant sealing layer 5 is an RLHY-1201 fire-resistant and heat-insulating coating. The RLHY-1201 fire-resistant and heat-insulating coating directly blocks the high-temperature hot air from penetrating to the outside, reducing the loss of heat through gas convection.

[0028] The fourth heat-resistant sealing layer 7 is a ceramic fiber coating. By using a ceramic fiber coating in the fourth heat-resistant sealing layer 7, the rotary kiln connecting cylinder 1 can effectively block the transfer of heat to the outside, thereby reducing heat loss and playing a heat preservation role.

[0029] The outer surface of the rotary kiln connecting cylinder 1 is provided with a heat insulation pad 8, which is an aerogel felt layer. The use of an aerogel felt layer in the heat insulation pad 8 avoids the external temperature from affecting the temperature inside the kiln, thereby playing a heat insulation role.

[0030] The working principle of this embodiment is as follows: When in use, the first refractory layer 3 and the second refractory layer 6, which are constructed from multiple refractory bricks 9, give the rotary kiln connecting cylinder 1 dual refractory performance. Then, the gap between the first refractory layer 3 and the inner wall of the rotary kiln connecting cylinder 1 is filled by the first heat-resistant sealing layer 2 with a nano-composite ceramic coating to form a continuous sealing film, preventing heat from leaking from the gap between the brick body and the rotary kiln connecting cylinder 1.

[0031] Next, the second heat-resistant sealing layer 4 uses ZS-1 high-temperature heat-insulating coating, which has good thermal shock resistance, can adapt to temperature fluctuations during the operation of the rotary kiln, avoids coating cracking due to thermal expansion and contraction, and ensures long-term sealing and heat insulation effect.

[0032] Then, the third heat-resistant sealing layer 5 uses RLHY-1201 fire-resistant and heat-insulating coating to directly block the high-temperature hot gas from penetrating to the outside, reduce the heat loss through gas convection, and at the same time avoid the direct scouring and wear of high-temperature materials on the outer fire-resistant layer, thus extending the service life of the fire-resistant layer.

[0033] The fourth heat-resistant sealing layer 7, with its ceramic fiber coating, effectively blocks the transfer of heat to the outside of the rotary kiln connecting cylinder 1, thereby reducing heat loss and providing insulation. Then, the aerogel felt layer of the insulation pad 8 prevents the external temperature from affecting the temperature inside the kiln, thus providing insulation.

[0034] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An energy-saving and heat-insulating structure for a rotary kiln, comprising a rotary kiln connecting cylinder (1), characterized in that, The inner surface of the rotary kiln connecting cylinder (1) is provided with a first heat-resistant sealing layer (2), the inner side of the first heat-resistant sealing layer (2) is provided with a first refractory layer (3), the inner side of the first refractory layer (3) is provided with a second heat-resistant sealing layer (4), the inner side of the second heat-resistant sealing layer (4) is provided with a third heat-resistant sealing layer (5), the inner side of the third heat-resistant sealing layer (5) is provided with a second refractory layer (6), and the inner side of the second refractory layer (6) is provided with a fourth heat-resistant sealing layer (7).

2. The energy-saving and heat-insulating structure for a rotary kiln according to claim 1, characterized in that, The outer surface of the rotary kiln connecting cylinder (1) is provided with a heat insulation pad (8), which is an aerogel felt layer.

3. The energy-saving and heat-insulating structure for a rotary kiln according to claim 1, characterized in that, The first refractory layer (3) and the second refractory layer (6) are both formed by multiple refractory bricks (9).

4. The energy-saving and heat-insulating structure for a rotary kiln according to claim 1, characterized in that, The first heat-resistant sealing layer (2) is a nano-composite ceramic coating.

5. The energy-saving and heat-insulating structure for a rotary kiln according to claim 1, characterized in that, The second heat-resistant sealing layer (4) is a ZS-1 high-temperature heat-insulating coating.

6. The energy-saving and heat-insulating structure for a rotary kiln according to claim 1, characterized in that, The third heat-resistant sealing layer (5) is an RLHY-1201 fire-resistant and heat-insulating coating.

7. The energy-saving and heat-insulating structure for a rotary kiln according to claim 1, characterized in that, The fourth heat-resistant sealing layer (7) is a ceramic fiber coating.

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