Low-heat-loss preheater with heat preservation function

Abstract

The utility model relates to low heat loss preheater technical field discloses a low heat loss preheater with heat preservation function, including support frame no.

Description

Technical Field

[0001] This utility model relates to the field of low heat loss preheater technology, and in particular to a low heat loss preheater with heat preservation function. Background Technology

[0002] In the cement production industry, low-heat-loss preheaters are extremely critical equipment, and their performance directly affects the quality of cement production and energy consumption. With increasingly stringent environmental standards, the cement industry places particular emphasis on improving the performance of low-heat-loss preheaters, not only to ensure their efficient preheating function but also to enable them to play a greater role in energy conservation, emission reduction, and pollution reduction.

[0003] Currently, common low-heat-loss preheaters mainly consist of components such as a cyclone separator, connecting pipes, and a feed pipe. Their working principle utilizes cyclone separation to achieve initial gas-solid separation. After the dust-laden airflow enters the cyclone separator, solid particles are thrown against the cylinder wall and slide down under centrifugal force, achieving separation. Heat exchange is achieved through counter-current flow, where the material and high-temperature flue gas flow in opposite directions, ensuring full contact and heat transfer. In the material conveying stage, traditional equipment such as bucket elevators and belt conveyors are commonly used, with chain and belt transmission components used to transfer materials.

[0004] Existing low heat loss preheaters lack a filtration structure in their exhaust pipes, resulting in the exhaust gas containing a large amount of dust and other pollutants. Direct emission into the surrounding environment will cause air pollution. Therefore, a low heat loss preheater with heat preservation function is proposed to solve the above problems. Utility Model Content

[0005] To overcome the above deficiencies, this utility model provides a low heat loss preheater with heat preservation function, which aims to improve the problem in the prior art where the exhaust gas contains a large amount of dust and other pollutants due to the lack of a filtration structure in the exhaust pipe, which causes air pollution.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A low-heat-loss preheater with heat preservation function includes a support frame, a cyclone tube fixedly connected inside the support frame, an exhaust pipe fixedly connected inside the cyclone tube, a discharge pipe fixedly connected to the bottom of the cyclone tube, a decomposition furnace arranged on one side wall of the support frame, a gas conveying pipe fixedly connected to the side wall of the decomposition furnace, a filter assembly arranged on the upper surface of the exhaust pipe, and a conveying assembly arranged on the side wall of the decomposition furnace.

[0008] The filter assembly includes a mounting sleeve, which is fixedly connected to the side wall of the exhaust pipe. A sliding groove is provided inside the mounting sleeve. A magnetic block is fixedly connected inside the mounting sleeve. A filter screen is provided inside the mounting sleeve. A handle is fixedly connected to the side wall of the filter screen. A slider is fixedly connected to the side wall of the filter screen. A magnetic block is fixedly connected inside the filter screen.

[0009] As a further description of the above technical solution:

[0010] The conveying assembly includes a conveying cylinder, a support frame two fixedly connected to the side wall of the conveying cylinder, a motor fixedly connected to the side wall of the conveying cylinder, an auger fixedly connected to the output end of the motor, a feed hopper fixedly connected to the upper surface of the conveying cylinder, a conveying pipe fixedly connected to the bottom of the conveying cylinder, one end of the conveying pipe fixedly connected to the inside of the cyclone, a protective layer provided inside the conveying cylinder, a reinforcing layer provided on the side wall of the protective layer, a heat insulation layer provided on the side wall of the reinforcing layer, and an inner surface layer provided on the side wall of the heat insulation layer.

[0011] As a further description of the above technical solution:

[0012] The slider sidewall is slidably connected inside the groove, and the magnetic block one attracts the magnetic block two;

[0013] As a further description of the above technical solution:

[0014] Both the first magnetic block and the second magnetic block are made of neodymium iron boron magnets to maintain good magnetism in high-temperature environments;

[0015] As a further description of the above technical solution:

[0016] The protective layer is made of polyurethane, which is used to prevent external moisture, acids and alkalis from corroding the conveyor cylinder, and also serves as heat insulation.

[0017] As a further description of the above technical solution:

[0018] The reinforcing layer is made of glass fiber reinforced plastic and is used to enhance the compression and deformation resistance of the conveying cylinder;

[0019] As a further description of the above technical solution:

[0020] The insulation layer is made of nano-aerogel felt to enhance the insulation effect of the conveyor cylinder;

[0021] As a further description of the above technical solution:

[0022] The inner surface layer is made of ceramic fiber to reduce heat transfer to the outside through the inner wall of the conveying cylinder.

[0023] This utility model has the following beneficial effects:

[0024] 1. In this utility model, by installing a filter screen on the exhaust pipe, the exhaust gas can be filtered, which helps to reduce pollution to the surrounding environment. By pulling the handle, the slider slides inside the groove, causing magnetic block one and magnetic block two to separate, making it easy to remove and replace the filter screen. This solves the problem that some low heat loss preheaters, due to the lack of a filter structure in the exhaust pipe, exhaust gas contains a large amount of dust and other pollutants, which are directly emitted into the surrounding environment and cause air pollution. The above structure improves and reduces air pollution.

[0025] 2. In this utility model, the starting motor drives the auger to rotate, which in turn transports the cement material. The material is transported in a relatively enclosed space, which allows the material to be mixed more thoroughly and the temperature distribution to be more uniform. By adding a protective layer, a reinforcing layer, an insulation layer, and an inner surface layer inside the conveying cylinder, the insulation effect inside the conveying cylinder is enhanced. Attached Figure Description

[0026] Figure 1 A three-dimensional schematic diagram of a low-heat-loss preheater with heat preservation function proposed in this utility model;

[0027] Figure 2 This is a schematic diagram of the internal structure of the conveyor cylinder of a low-heat-loss preheater with heat preservation function proposed in this utility model.

[0028] Figure 3 This is a schematic diagram of the installation sleeve of a low heat loss preheater with heat preservation function proposed in this utility model;

[0029] Figure 4 This is a schematic diagram of the structure of a filter screen for a low-heat-loss preheater with heat preservation function proposed in this utility model;

[0030] Figure 5 This is a schematic diagram of the material of the conveyor cylinder of a low-heat-loss preheater with heat preservation function proposed in this utility model.

[0031] Legend:

[0032] 1. Support frame one; 2. Cyclone drum; 3. Exhaust pipe; 4. Discharge pipe; 5. Decomposition furnace; 6. Conveying pipe; 7. Mounting sleeve; 8. Slide chute; 9. Filter screen; 10. Handle; 11. Sliding block; 12. Magnetic block one; 13. Magnetic block two; 14. Support frame two; 15. Conveying drum; 16. Motor; 17. Feed hopper; 18. Air conveying pipe; 19. Screw conveyor; 20. Protective layer; 21. Reinforcing layer; 22. Insulation layer; 23. Inner surface layer. Detailed Implementation

[0033] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0034] Reference Figures 1-4 This utility model provides an embodiment of a low-heat-loss preheater with heat preservation function, including a support frame 1. A cyclone 2 is fixedly connected inside the support frame 1, and an exhaust pipe 3 is fixedly connected inside the cyclone 2. The exhaust pipe 3 is used to discharge the gas after gas-solid separation inside the cyclone 2. A discharge pipe 4 is fixedly connected to the bottom of the cyclone 2, and the function of the discharge pipe 4 is to transport the solid material separated by the cyclone 2 to the next process. A decomposition furnace 5 is provided on the side wall of the support frame 1, and a gas conveying pipe 18 is fixedly connected to the side wall of the decomposition furnace 5. The gas conveying pipe 18 is used to transport the high-temperature gas generated in the reaction inside the decomposition furnace 5. A filter assembly is provided on the upper surface of the exhaust pipe 3. The filter assembly includes an installation sleeve 7, which is fixedly connected to the side wall of the exhaust pipe 3. A sliding groove 8 is opened inside the installation sleeve 7, and the sliding groove 8 cooperates with the slider 11 to install the filter screen 9. The disassembly is guided by a magnetic block 12 fixedly connected inside the mounting sleeve 7. A filter screen 9 is installed inside the mounting sleeve 7, which can intercept dust particles in the exhaust gas, effectively purifying the exhaust gas and reducing pollution to the surrounding environment. A handle 10 is fixedly connected to the side wall of the filter screen 9 for easy gripping by operators. A slider 11 is fixedly connected to the side wall of the filter screen 9, and the side wall of the slider 11 is slidably connected inside the slide groove 8, allowing for the installation and disassembly of the filter screen 9. A magnetic block 13 is fixedly connected inside the filter screen 9. Both magnetic blocks 12 and 13 are made of neodymium iron boron magnets, which can maintain good magnetism in high-temperature environments. Magnetic blocks 13 and 12 attract each other, jointly fixing the filter screen 9 inside the mounting sleeve 7, ensuring that the filter screen 9 will not loosen or fall off due to airflow impact or other factors during operation, thus ensuring the reliability of the filtration work.

[0035] When using this equipment, the material is first poured into the conveying cylinder 15 through the feed hopper 17. After the material enters the conveying cylinder 15, the heat generated by the decomposition furnace 5 enters the conveying cylinder 15 through the gas supply pipe 18. The decomposition furnace 5 releases a large amount of heat by burning fuel. The gas supply pipe 18 connects the decomposition furnace 5 and the conveying cylinder 15, serving as a heat transfer channel, introducing high-temperature hot gas from the decomposition furnace 5 into the conveying cylinder 15. The hot gas flows inside the conveying cylinder 15, and the cement material comes into full contact with the hot gas. The heat in the hot gas is quickly transferred to the cement material, achieving the preheating function of the material, increasing the temperature of the material, providing convenience for subsequent processing, and reducing the energy consumption of subsequent processing. After the material has completed preheating, it enters the cyclone 2 through the conveying pipe 6 for gas-solid separation. Inside the cyclone 2, the high-speed rotating airflow uses the principle of centrifugal force to throw the solid particles in the material against the cylinder wall under the action of centrifugal force, and then along the cylinder... The wall collapses, achieving gas-solid separation and ensuring the purity and quality of subsequent cement materials. Finally, the cement material is discharged from the discharge pipe 4 for easy collection and further processing. By installing a filter screen 9 on the exhaust pipe 3, the fine mesh of the filter screen 9 can intercept dust particles in the gas, significantly reducing the amount of dust emitted into the atmosphere and greatly reducing pollution to the surrounding environment. When it is necessary to clean the filter screen 9, the handle 10 is pulled to make the slider 11 slide outward inside the slide groove 8. The slide groove 8 provides a sliding track for the slider 11, and the resulting pulling force separates the magnetic block 12 and the magnetic block 2 13. The magnetic block 12 and the magnetic block 2 13 attract each other with magnetic force, which serves to fix the filter screen 9. When the two are separated, the filter screen 9 loses its fixed constraint, thereby achieving the effect of disassembling the filter screen 9, which is convenient for operators to clean the filter screen 9 and ensure that the filtration performance of the filter screen 9 is always in good condition.

[0036] Reference Figure 1 , Figure 2 and Figure 5The conveying assembly includes a conveying cylinder 15, which provides a closed channel for material conveying. A support frame 14 is fixedly connected to the side wall of the conveying cylinder 15, supporting it. A motor 16 is fixedly connected to the side wall of the conveying cylinder 15, and an auger 19 is fixedly connected to the output end of the motor 16. A feed hopper 17 is fixedly connected to the upper surface of the conveying cylinder 15, receiving the material to be conveyed. A conveying pipe 6 is fixedly connected to the bottom of the conveying cylinder 15, connecting it to the cyclone separator 2 and guiding the material conveyed in the conveying cylinder 15 into the cyclone separator 2. One end of the conveying pipe 6 is fixedly connected inside the cyclone separator 2. A protective layer 20 is installed inside the conveying cylinder 15, made of polyurethane. Polyurethane has good chemical stability, preventing external moisture, acids, alkalis, and other substances from corroding the conveying cylinder 15, extending its service life. Layer 20 also provides some insulation, reducing the impact of external temperature on the temperature of the material inside the conveying cylinder 15. A reinforcing layer 21 is provided on the side wall of the protective layer 20. The reinforcing layer 21 is made of glass fiber reinforced plastic, which has high strength and rigidity, enhancing the conveying cylinder 15's resistance to pressure and deformation, making it less prone to deformation when bearing the weight of the material and internal pressure. An insulation layer 22 is provided on the side wall of the reinforcing layer 21. The insulation layer 22 is made of nano-aerogel felt, which has extremely low thermal conductivity, effectively reducing heat transfer and enhancing the insulation effect of the conveying cylinder 15. An inner surface layer 23 is provided on the side wall of the insulation layer 22. The inner surface layer 23 is made of ceramic fiber, which has excellent insulation properties, further reducing heat transfer through the inner wall of the conveying cylinder 15. Simultaneously, the smooth surface of the ceramic fiber reduces friction between the material and the inner wall of the conveying cylinder 15, making material conveying smoother.

[0037] During the conveying process, the material in the auger 19 moves axially under the push of the spiral blades, being stably conveyed from one end of the feed hopper 17 to the other end of the conveying pipe 6. Simultaneously, due to the spiral shape of the blades, the material also undergoes radial tumbling during this axial movement. This radial tumbling allows the material to mix at different locations within the conveying cylinder 15, preventing material accumulation or uneven distribution. This ensures more thorough mixing during conveying, resulting in a more uniform temperature distribution. During cement preheating, all parts of the material can contact the hot air more evenly, improving the preheating effect and reducing the risk of temperature unevenness. To address quality differences, the protective layer 20 added inside the conveyor cylinder 15 is made of polyurethane. Polyurethane material has excellent sealing properties and chemical stability, effectively preventing outside air from entering the conveyor cylinder 15 and reducing heat loss due to air convection. It also resists corrosion from external moisture, acids, alkalis, and other substances, protecting the structural integrity of the conveyor cylinder 15. The reinforcing layer 21 is made of glass fiber reinforced plastic and is tightly bonded to the outside of the protective layer 20. Glass fiber reinforced plastic has high strength and high rigidity, enhancing the conveyor cylinder 15's resistance to pressure and deformation. In terms of shape retention, during the conveying process, the conveying cylinder 15 may be affected by the gravity of the material, the pressure of the internal hot air, and the external environment. The reinforcing layer 21 can effectively disperse these forces, ensuring that the conveying cylinder 15 maintains a stable shape and structure under complex working conditions, providing a foundation for normal material conveying and heat preservation. The heat preservation layer 22 is made of nano-aerogel felt, which has extremely low thermal conductivity. Wrapped around the outside of the reinforcing layer 21, it can greatly hinder heat transfer. Whether it is the heat introduced from the decomposition furnace 5 or the heat of the material itself, it can be effectively blocked by the heat preservation layer 22. The inner surface layer 23, made of ceramic fiber, is located at the innermost part of the conveying cylinder 15 and is in direct contact with the material. The ceramic fiber has good heat insulation properties, which can further reduce the heat transfer to the outside environment through the inner wall of the conveying cylinder 15. At the same time, the smooth surface of the ceramic fiber can reduce the friction between the material and the inner wall of the conveying cylinder 15. This not only facilitates the smooth conveying of the material, but also reduces the heat loss caused by friction. All these factors work together to ensure the heat insulation effect inside the conveying cylinder 15.

[0038] Working principle: When using this equipment, the material is first poured into the conveying cylinder 15 through the feed hopper 17. Then, the heat generated by the decomposition furnace 5 enters the conveying cylinder 15 through the gas pipe 18. The cement material comes into contact with the hot gas to achieve the preheating function. Then, the motor 16 is started to drive the auger 19 to rotate, thereby conveying the cement material. During the conveying process, the material moves axially under the push of the spiral blades of the auger 19, and at the same time, there is a certain radial tumbling, so that the material can be more fully mixed in the conveying cylinder 15 and the temperature distribution is more uniform. Then, the material enters the cyclone 2 through the conveying pipe 6 for gas-solid separation. Finally, the cement material is discharged from the discharge pipe 4. By installing a filter screen 9 on the exhaust pipe 3, the gas is intercepted by the filter screen 9 when it is discharged, which significantly reduces the amount of dust emitted into the atmosphere and helps to reduce pollution to the surrounding environment. When it is necessary to clean the filter screen 9, the slider 11 is moved outward inside the slide groove 8 by pulling the handle 10. The resulting pulling force separates the magnetic block 12 and the magnetic block 13, thereby achieving the effect of disassembling the filter screen 9. The protective layer 20, the reinforcing layer 21, the insulation layer 22, and the inner surface layer 23 added inside the conveying cylinder 15 further improve the insulation effect inside the conveying cylinder 15 and reduce the heat loss caused by air convection.

[0039] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A low-heat-loss preheater with heat preservation function, comprising a support frame (1), characterized in that: A cyclone (2) is fixedly connected inside the support frame (1), an exhaust pipe (3) is fixedly connected inside the cyclone (2), a discharge pipe (4) is fixedly connected to the bottom of the cyclone (2), a decomposition furnace (5) is provided on the side wall of the support frame (1), a gas supply pipe (18) is fixedly connected to the side wall of the decomposition furnace (5), a filter assembly is provided on the upper surface of the exhaust pipe (3), and a conveying assembly is provided on the side wall of the decomposition furnace (5). The filter assembly includes a mounting sleeve (7), which is fixedly connected to the side wall of the exhaust pipe (3). A sliding groove (8) is provided inside the mounting sleeve (7). A magnetic block (12) is fixedly connected inside the mounting sleeve (7). A filter screen (9) is provided inside the mounting sleeve (7). A handle (10) is fixedly connected to the side wall of the filter screen (9). A slider (11) is fixedly connected to the side wall of the filter screen (9). A magnetic block (13) is fixedly connected inside the filter screen (9).

2. A low-heat-loss preheater with heat preservation function according to claim 1, characterized in that: The conveying assembly includes a conveying cylinder (15), a support frame (14) is fixedly connected to the side wall of the conveying cylinder (15), a motor (16) is fixedly connected to the side wall of the conveying cylinder (15), an auger (19) is fixedly connected to the output end of the motor (16), a feed hopper (17) is fixedly connected to the upper surface of the conveying cylinder (15), a conveying pipe (6) is fixedly connected to the bottom of the conveying cylinder (15), one end of the conveying pipe (6) is fixedly connected to the inside of the cyclone (2), a protective layer (20) is provided inside the conveying cylinder (15), a reinforcing layer (21) is provided on the side wall of the protective layer (20), a heat insulation layer (22) is provided on the side wall of the reinforcing layer (21), and an inner surface layer (23) is provided on the side wall of the heat insulation layer (22).

3. A low-heat-loss preheater with heat preservation function according to claim 1, characterized in that: The slider (11) is slidably connected to the inside of the groove (8) on its side wall, and the magnetic block one (12) attracts the magnetic block two (13).

4. A low-heat-loss preheater with heat preservation function according to claim 1, characterized in that: Both the first magnetic block (12) and the second magnetic block (13) are made of neodymium iron boron magnets to maintain good magnetism in high-temperature environments.

5. A low-heat-loss preheater with heat preservation function according to claim 2, characterized in that: The protective layer (20) is made of polyurethane to prevent external moisture and acid / alkali substances from corroding the conveying cylinder (15), and also to provide a certain degree of heat insulation.

6. A low-heat-loss preheater with heat preservation function according to claim 2, characterized in that: The reinforcing layer (21) is made of glass fiber reinforced plastic and is used to enhance the pressure resistance and deformation resistance of the conveying cylinder (15).

7. A low-heat-loss preheater with heat preservation function according to claim 2, characterized in that: The insulation layer (22) is made of nano-aerogel felt and is used to enhance the insulation effect of the conveying cylinder (15).

8. A low-heat-loss preheater with heat preservation function according to claim 2, characterized in that: The inner surface layer (23) is made of ceramic fiber to reduce heat transfer to the outside through the inner wall of the conveying cylinder (15).

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