An anti-skinning device for a viscous feed chute
By setting up a hot air layer and an insulated cavity outside the feeding chute, and using a hot air blower to heat the feeding chute, the problem of easy crusting of the feeding chute is solved, and the material flowability is improved and energy consumption is controlled.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ANHUI CONCH DESIGN & RES INST OF BUILDING MATERIALS CO LTD
- Filing Date
- 2025-05-29
- Publication Date
- 2026-06-02
AI Technical Summary
During the raw material grinding process, the feed chute is prone to crusting and clogging due to the high moisture content and sticky materials in the mixture, which is difficult to prevent effectively with existing technology.
By installing a hot air layer on the outer casing of the feeding chute and forming an insulated cavity, hot air is introduced into the cavity using a hot air blower to heat the feeding chute, ensuring that the temperature of the inner wall of the feeding chute is higher than the dew point of the material, thus preventing water vapor condensation and adhesion.
It effectively prevents adhesion and crusting on the inner wall of the feed chute, improves material flowability, reduces equipment blockage, and lowers energy consumption.
Smart Images
Figure CN224316717U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of feeding chutes, specifically to an anti-scabbing device for viscous feeding chutes. Background Technology
[0002] Raw material grinding is one of the core steps in cement production. It is responsible for mixing raw materials such as limestone, clay, and iron powder in a certain proportion and grinding them into fine powder to prepare for subsequent calcination.
[0003] The specific process of raw material grinding mainly includes: the mixed material from the batching station is first fed through the feed sealing valve, and then enters the roller press system for grinding. Due to the high overall moisture content of the mixed material, and the presence of sticky materials in some factory batches, coupled with the numerous turns and poor ventilation in the feed chute before the feed sealing valve, the mixed material is prone to forming a crust or even blockage in the chute before the feed sealing valve, requiring regular manual cleaning. Utility Model Content
[0004] The purpose of this invention is to provide an anti-scabbing device for viscous feed chutes. This anti-scabbing device for viscous feed chutes can effectively prevent the feed chutes from forming a skin by introducing hot air to heat the feed chutes.
[0005] To achieve the above objectives, this utility model provides an anti-scabbing device for a sticky feed chute, comprising a hot air blower, a hot air layer, and an outer insulation layer. The hot air layer is sleeved on the outside of the feed chute, and an insulation cavity is provided between the hot air layer and the feed chute. The hot air blower is connected to the insulation cavity to introduce hot air into the insulation cavity. The outer insulation layer is provided along the outer surface of the hot air layer to insulate the insulation cavity.
[0006] The hot air blower is connected to the hot air layer at the inlet, and the hot air layer is also equipped with an outlet. The inlet and outlet work together to achieve continuous heating of the feeding chute.
[0007] Preferably, the distance between the hot air layer and the feeding chute is set to 80-100mm.
[0008] Preferably, a reinforcing rib is provided between the hot air layer and the feeding chute to support the hot air layer.
[0009] Preferably, the hot air blower is connected to the high-temperature flue gas pipeline.
[0010] Preferably, the outlet is equipped with an exhaust pipe, which is connected to the feed sealing valve discharge chute to allow the exhaust gas to enter the V-type classifier system.
[0011] Preferably, the inlet and outlet are arranged opposite each other, and the heights of the inlet and outlet are respectively set at the upper and lower ends of the insulation cavity.
[0012] Preferably, the thickness of the external insulation layer is set to 100-120mm.
[0013] According to the above technical solution, the hot air blower of this utility model draws hot air and sends it into the heat-insulated cavity to heat the feeding chute, thereby heating the feeding chute to prevent adhesion or crusting.
[0014] When hot, wet materials enter a chute with a lower temperature, water vapor easily condenses on the cold wall, forming a wet film. This exacerbates the adhesion and crusting of the material. By heating the feeding chute, the temperature of the inner wall of the feeding chute is made higher than the dew point temperature of the material, thus reliably preventing water vapor condensation inside the feeding chute, reducing the formation of a wet sticky layer, and thus preventing adhesion or crusting on the inner wall of the feeding chute.
[0015] Moisture, especially free water, in the mixture within the feed chute is a key factor leading to adhesion and crusting. When the feed chute is heated, moisture on the inner wall of the chute and on the surface of the material adhering to it evaporates. As the moisture content of the material at the contact surface decreases, the adhesion between the material and the inner wall of the feed chute is effectively reduced, increasing material flowability and preventing adhesion or crusting on the inner wall of the feed chute.
[0016] Therefore, a hot air layer is set outside the feeding chute, and an insulated cavity is formed between the hot air layer and the feeding chute. Hot air drawn by the hot air blower is sent into the insulated cavity, and the hot air in the insulated cavity can heat the feeding chute, thereby reliably preventing the material from sticking or forming a skin inside the feeding chute.
[0017] Other features and advantages of this invention will be described in detail in the following detailed description section. Attached Figure Description
[0018] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the following detailed description to explain the present invention, but do not constitute a limitation thereof. In the drawings:
[0019] Figure 1 This is a diagram illustrating the usage status of an anti-scabbing device for a sticky feed chute.
[0020] Figure 2 This is a schematic diagram of an anti-scabbing device for a sticky feed chute;
[0021] Figure 3 This is a schematic diagram showing the connection between a hot air layer and a feeding chute.
[0022] Explanation of reference numerals in the attached figures
[0023] 1. Hot air blower 2. Hot air layer
[0024] 3. External insulation layer; 4. Insulation cavity
[0025] 21 entrances, 22 exits
[0026] 5. Reinforcing ribs; 6. High-temperature flue gas pipeline
[0027] 7 Feed sealing valve 8V type air classifier system
[0028] 10 Feeding Slides Detailed Implementation
[0029] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of this utility model.
[0030] In this utility model, unless otherwise stated, directional words such as "one end," "the other end," "outer surface," "axis," "conical," and "near" in the terminology only represent the orientation of the term in its conventional use or are common terms understood by those skilled in the art, and should not be regarded as limitations on the term.
[0031] See Figure 2 The aforementioned anti-scabbing device for a sticky feed chute includes a hot air blower 1, a hot air layer 2, and an outer insulation layer 3. The hot air layer 2 is sleeved on the outside of the feed chute 10, and an insulation cavity 4 is provided between the hot air layer 2 and the feed chute 10. The hot air blower 1 is connected to the insulation cavity 4 to introduce hot air into the insulation cavity 4. The outer insulation layer 3 is provided along the outer surface of the hot air layer 2 to insulate the insulation cavity 4.
[0032] Hot air blower 1 is connected to hot air layer 2 at inlet 21. Hot air layer 2 is also provided with outlet 22. Inlet 21 and outlet 22 work together to achieve continuous heating of feed chute 10.
[0033] By implementing the above technical solution, the hot air blower 1 draws hot air and sends it into the heat-insulated cavity 4 to heat the feeding chute 10, thereby heating the feeding chute 10 to prevent adhesion or crusting.
[0034] When hot and wet materials enter a chute with a lower temperature, water vapor easily condenses on the cold wall, forming a wet film. This exacerbates the adhesion and crusting of the material. By heating the feeding chute 10, the temperature of the inner wall of the feeding chute 10 is made higher than the dew point temperature of the material, thus reliably preventing water vapor condensation inside the feeding chute 10, reducing the formation of a wet sticky layer, and thus preventing adhesion or crusting on the inner wall of the feeding chute 10.
[0035] The moisture content, especially free water, in the mixture in the feed chute 10 is a key factor leading to adhesion and crusting. After the feed chute 10 is heated, the moisture on the inner wall of the feed chute 10 and the surface of the material adhering to the inner wall of the feed chute 10 will evaporate. As the moisture content of the material at the contact surface decreases, the adhesion between the material and the inner wall of the feed chute 10 is effectively reduced, the material flowability is enhanced, and the adhesion or crusting of the material on the inner wall of the feed chute 10 can be avoided.
[0036] Therefore, a hot air layer 2 is set outside the feeding chute 10, and an insulated cavity 4 is formed between the hot air layer 2 and the feeding chute 10. The hot air drawn by the hot air blower 1 is sent into the insulated cavity 4, and the hot air in the insulated cavity 4 can heat the feeding chute 10, thereby reliably preventing the material from sticking or forming a skin inside the feeding chute 10.
[0037] In this embodiment, preferably, the distance between the hot air layer 2 and the feeding chute 10 is set to 80-100mm.
[0038] By adjusting the distance between the hot air layer 2 and the feeding chute 10, the volume of hot air corresponding to the inner wall of the feeding chute 10 per unit area can be adjusted. When the temperature of the hot air drawn by the hot air blower 1 is constant, adjusting the distance between the hot air layer 2 and the feeding chute 10 will affect the heating effect of the hot air on the feeding chute 10.
[0039] When the distance between the hot air layer 2 and the feeding chute 10 is less than 80mm, the hot air in the insulation cavity 4 cannot provide enough heat to heat the feeding chute 10 during the heat exchange process, thus affecting the performance of the anti-scabbing device.
[0040] When the distance between the hot air layer 2 and the feeding chute 10 is greater than 100mm, although it can achieve a better heating effect on the feeding chute 10, the volume of the insulation cavity 4 is larger at this time, requiring more hot air to be introduced, which increases the energy consumption of the equipment.
[0041] Preferably, when the distance between the hot air layer 2 and the feed chute 10 is set to 80-100mm, the introduction of hot air at 150-200℃ can reliably heat the feed chute 10, and the air volume of the hot air blower 1 is relatively small, which is beneficial for on-site energy consumption control. In the production environment of raw material grinding, the temperature of the hot air introduced at the feed sealing valve is 150-200℃, so the hot air at the feed sealing valve can be easily removed from the feed chute 10 for heating.
[0042] In this embodiment, preferably, a reinforcing rib 5 for supporting the hot air layer 2 is provided between the hot air layer 2 and the feeding chute 10.
[0043] To ensure the stability of the hot air layer 2 during use, a reinforcing rib 5 is provided along the axial direction of the feeding chute 10 between the hot air layer 2 and the feeding chute 10 to support the hot air layer 2. Through the action of the reinforcing rib 5, the distance between the hot air layer 2 and the feeding chute 10 can be effectively guaranteed, thereby maintaining the volume of the insulation cavity 4 and keeping the hot air volume in the insulation cavity 4 stable, so as to achieve continuous and stable heating of the feeding chute 10.
[0044] In one embodiment, to save on equipment manufacturing costs, the hot air layer 2 is made of thin steel plate. Since the thin steel plate lacks sufficient strength, reinforcing ribs 5 are needed to increase the structural strength of the anti-scabbing device.
[0045] The reinforcing ribs 5 are evenly distributed along the outer surface of the feed chute 10. The reinforcing ribs 5 are evenly distributed along the generatrix of the feed chute 10, with adjacent reinforcing ribs 5 on the same generatrix spaced 1000mm apart. The reinforcing ribs 5 are evenly distributed along the circumference of the feed chute 10, with adjacent reinforcing ribs 5 on the same cross-section spaced 600mm apart.
[0046] Preferably, the reinforcing ribs 5 located on two adjacent sections are staggered along the height direction. This increases the resistance of the hot air in the insulation cavity 4, allowing the hot air at the same speed to have a longer residence time in the anti-scabbing device, thereby enhancing the heating effect of the anti-scabbing device.
[0047] In this embodiment, preferably, the hot air blower 1 is connected to the high-temperature flue gas pipeline 6.
[0048] Hot air blower 1 introduces kiln tail exhaust gas at 150-200℃ into the insulated cavity 4 outside the feed chute 10, with an air volume of approximately 2m³ per unit area. 3 / min. To simplify the process and save equipment, the spare capacity of the induced draft fan built into the feeding sealing valve 7 can be used. That is, the anti-scabbing device and the feeding sealing valve 7 share a hot air fan 1. Part of the hot air taken out by the hot air fan 1 is sent to the feeding sealing valve 7 and the other part is sent to the anti-scabbing device.
[0049] Preferably, a control valve is provided at the feeding sealing valve 7, which can be adjusted to control the ratio of hot air entering the feeding sealing valve 7 and the anti-scaling device. If the temperature inside the feeding sealing valve 7 is high, the control valve can be closed appropriately to allow more hot air to enter the anti-scaling device, thereby achieving a cooling effect on the feeding sealing valve 7.
[0050] Preferably, the workshop has an air intake duct connected to the kiln tail smoke chamber, and the hot air blower 1 is connected to this air intake duct so that hot air can be directly drawn from the duct. By controlling the power of the hot air blower 1, the air volume drawn by the hot air blower 1 per unit time can be controlled.
[0051] In this embodiment, preferably, the outlet 22 is provided with an exhaust pipe, which is connected to the discharge chute of the feed sealing valve 7, for the purpose of introducing the waste gas into the V-type classifier system 8.
[0052] Since the hot air extracted by the anti-scabbing device is high-temperature flue gas used in production, it cannot be directly discharged into the environment and the harmful substances in this flue gas need to be treated.
[0053] In one implementation, these high-temperature flue gases are returned to the system via exhaust pipes, and the existing treatment equipment in the system is used to treat these high-temperature flue gases uniformly.
[0054] In this embodiment, preferably, the inlet 21 and the outlet 22 are arranged opposite to each other, and the heights of the inlet 21 and the outlet 22 are respectively set at the upper and lower ends of the heat-insulating cavity 4.
[0055] The inlet 21 and outlet 22 are arranged opposite to each other, so that the projection positions of the inlet 21 and outlet 22 are located at the two ends of the diameter of the projection surface of the heat-insulating cavity 4, respectively. When hot air enters through the inlet 21, it can flow evenly to both sides, so that the hot air is evenly distributed along the circumference of the heat-insulating cavity 4.
[0056] The inlet 21 and outlet 22 are respectively set at the upper and lower ends of the insulation cavity 4. The hot air can be evenly distributed along the circumference of the insulation cavity 4 and along the height direction of the insulation cavity 4, thereby ensuring the uniform distribution of hot air in the insulation cavity 4.
[0057] This method not only ensures uniform heating of all parts of the feeding chute 10 by hot air, making it less prone to adhesion or crusting, but also reliably extends the travel distance of the hot air within the insulation cavity 4, thereby increasing the residence time of the hot air within the insulation cavity 4 and ensuring the heating effect of the hot air on the feeding chute 10.
[0058] In this embodiment, preferably, the thickness of the outer insulation layer 3 is set to 100-120mm.
[0059] Setting up a sufficiently thick insulation layer can reduce heat loss and lower the system's energy consumption.
[0060] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention.
[0061] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable way without contradiction. In order to avoid unnecessary repetition, this utility model will not describe the various possible combinations separately.
[0062] Furthermore, various different embodiments of this utility model can be combined in any way, as long as they do not violate the spirit of this utility model, they should also be regarded as the content disclosed by this utility model.
Claims
1. An anti-scabbing device for a sticky feed chute, characterized in that, It includes a hot air blower (1), a hot air layer (2) and an outer insulation layer (3). The hot air layer (2) is fitted over the feed chute (10). An insulation cavity (4) is provided between the hot air layer (2) and the feed chute (10). The hot air blower (1) is connected to the insulation cavity (4) to introduce hot air into the insulation cavity (4). The outer insulation layer (3) is provided along the outer surface of the hot air layer (2) to insulate the insulation cavity (4). The hot air blower (1) and the hot air layer (2) are connected at the inlet (21). The hot air layer (2) is also provided with an outlet (22). The inlet (21) and the outlet (22) work together to achieve continuous heating of the feed chute (10).
2. The anti-scabbing device for a sticky feed chute according to claim 1, characterized in that, The distance between the hot air layer (2) and the feeding chute (10) is set to 80-100mm.
3. The anti-scabbing device for a sticky feed chute according to claim 2, characterized in that, A reinforcing rib (5) is provided between the hot air layer (2) and the feeding chute (10) to support the hot air layer (2).
4. The anti-scabbing device for a viscous feed chute according to claim 1, characterized in that, The hot air blower (1) is connected to the high-temperature flue gas pipeline (6).
5. The anti-scabbing device for a sticky feed chute according to claim 1, characterized in that, The outlet (22) is equipped with an exhaust pipe, which is connected to the feed sealing valve (7) and the discharge chute, and is used to put the waste gas into the V-type classifier system (8).
6. The anti-scabbing device for a sticky feed chute according to claim 1, characterized in that, The inlet (21) and outlet (22) are arranged opposite to each other, and the inlet (21) and outlet (22) are respectively located at the upper and lower ends of the heat-insulating cavity (4).
7. The anti-scabbing device for a sticky feed chute according to claim 1, characterized in that, The thickness of the outer insulation layer (3) is set to 100-120mm.