Indirect heating type high-temperature atmosphere shaft furnace

Abstract

The utility model relates to the technical field of high-temperature calcination of powder, and discloses an indirect heating type high-temperature atmosphere shaft furnace, which comprises a feeding device, a heating device and a heating device, the pushing device is connected with the feeding device and used for pushing the materials to the material storage pipe body; the material storage pipe body is a vertical cylindrical container and is internally used for accommodating and conveying materials; the heating rods are distributed in the axial direction of the material storage pipe body and used for providing a high-temperature heat source. And the heating rods are axially distributed along the material storage pipe body, so that the heating efficiency is improved, the materials are uniformly and efficiently heated, and the energy utilization efficiency is remarkably improved. Due to the arrangement of heat preservation cotton and a heat insulation layer, heat loss is effectively reduced, the temperature in the furnace is more stable, and the calcination efficiency is further improved. Meanwhile, different temperature intervals can be formed in the furnace due to the design of the thermal insulation layer, so that the requirements of different materials on temperature are met, and the applicability of the equipment is enhanced.

Description

Technical Field

[0001] This utility model relates to the field of high-temperature calcination technology of powders, specifically an indirect heating high-temperature atmosphere vertical furnace. Background Technology

[0002] With the continuous advancement of industrialization, high-temperature calcination technology plays a crucial role in many fields, especially in industries such as ceramics, metallurgy, and chemicals, involving the high-temperature treatment and calcination of powder materials. Traditional high-temperature calcination equipment, such as rotary kilns and tunnel kilns, has been widely used in these fields, providing large production capacities, but it also has some significant drawbacks.

[0003] Rotary kilns and tunnel kilns typically require a large floor area. Due to their operating principles and structural design, these devices often require long operating times and significant space to complete the calcination process, placing higher demands on plant space planning and equipment layout. Furthermore, traditional equipment often faces substantial heat loss during high-temperature calcination, particularly heat dissipation and uneven distribution, resulting in low energy efficiency and increased operating costs.

[0004] Rotary kilns and tunnel kilns have low filling rates. Due to design limitations, powder materials have a longer residence time in the furnace and are often unevenly distributed, leading to reduced calcination efficiency. Furthermore, the rolling motion of rotary kilns and the fixed structure of tunnel kilns make material movement within the furnace more complex, making it difficult to achieve uniform heating, thus affecting product quality and production efficiency.

[0005] Therefore, based on the above-mentioned technical problems, it is necessary for those skilled in the art to develop an indirect heating high-temperature atmosphere vertical furnace. Utility Model Content

[0006] The purpose of this invention is to provide an indirect heating high-temperature atmosphere vertical furnace to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A technical solution for an indirect heating high-temperature atmosphere vertical furnace includes:

[0009] Feeding device, used for continuously inputting mixed materials;

[0010] A pushing device, connected to the feeding device, is used to push materials into the material storage tube.

[0011] The material storage pipe is a vertical cylindrical container used to hold and transport materials.

[0012] Heating rods are distributed axially along the material storage tube to provide a high-temperature heat source;

[0013] Thermal insulation cotton is wrapped around the outside of the material storage tube to reduce heat loss;

[0014] A thermal insulation layer is provided in multiple temperature zones of the material storage pipe to achieve temperature gradient control;

[0015] The equipment casing is wrapped with the insulation cotton and heat insulation layer to form an integral structure;

[0016] A reducing pipe is connected to the bottom of the material storage pipe body to adjust the material flow rate;

[0017] The discharge device is connected to the reducing pipe and is used to output the sintered material;

[0018] An atmosphere inlet is located at the bottom of the material storage pipe for introducing protective gas.

[0019] A storage device, connected to the discharge device, is used to collect and temporarily store finished materials;

[0020] The upper end of the material storage tube is connected to the feeding device and the pushing device by bolts, and the lower end is connected to the reducing pipe, the discharging device and the storage device by bolts.

[0021] As a preferred technical solution, the heating rod is arranged in sections along the axial direction of the material storage tube, and the temperature of each section is independently controlled to form a temperature gradient of 800°C to 1400°C.

[0022] As a preferred technical solution, the insulation layer is composed of multiple layers of ceramic fiber boards, with air gaps between each layer to enhance the heat insulation effect.

[0023] As a preferred technical solution, the gas introduced through the atmosphere inlet is nitrogen or an inert gas, used to isolate oxygen during the sintering process.

[0024] As a preferred technical solution, the diameter of the variable diameter tube gradually decreases from top to bottom to accelerate the falling of materials and distribute them evenly.

[0025] As a preferred technical solution, the feeding device is a screw feeder, the speed of which is adjustable to match the feeding requirements of different materials.

[0026] As a preferred technical solution, the storage device is equipped with a sealing valve to ensure that the discharge process is isolated from the external environment.

[0027] As a preferred technical solution, the outer layer of the equipment shell is coated with a high-temperature resistant and corrosion-resistant coating, and the interior is filled with aluminum silicate insulation material.

[0028] Compared with the prior art, the beneficial effects of this utility model are:

[0029] This invention relates to an indirect heating high-temperature atmosphere vertical furnace. The heating rods are distributed axially along the material storage tube, which not only improves heating efficiency but also achieves uniform and efficient heating of the material, significantly enhancing energy utilization efficiency. The inclusion of insulation cotton and a heat insulation layer effectively reduces heat loss, making the furnace temperature more stable and further improving calcination efficiency. Simultaneously, the heat insulation layer design allows for the creation of different temperature zones within the furnace, meeting the temperature requirements of various materials and enhancing the equipment's applicability.

[0030] The enclosure and high-temperature resistant anti-corrosion coating not only protect the internal structure from external environmental influences but also enhance the overall durability of the equipment. The variable-diameter pipe design, by adjusting the material flow rate, ensures more uniform material distribution within the furnace, further improving calcination quality. The protective gas inlet effectively isolates oxygen, preventing oxidation of the material during calcination and guaranteeing product quality and performance.

[0031] Furthermore, the indirect heating high-temperature atmosphere vertical furnace of this invention also has advantages such as small footprint, high filling rate, and simple operation. Compared with traditional high-temperature calcination equipment, this invention has significant advantages in improving calcination efficiency, ensuring product quality, and reducing operating costs, and has broad application prospects and market value. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the overall structure of an indirect heating high-temperature atmosphere vertical furnace.

[0033] In the attached diagram, the following are the reference numerals: 1. Feeding device; 2. Pushing device; 3. Material storage pipe; 4. Heating rod; 5. Insulation cotton; 6. Insulation layer; 7. Equipment shell; 8. Reducing pipe; 9. Discharge device; 10. Atmosphere inlet; 11. Storage device. Detailed Implementation

[0034] The features and exemplary embodiments of various aspects of this utility model will now be described in detail. To make the objectives, technical solutions, and advantages of this utility model clearer, the following description, in conjunction with the accompanying drawings and specific embodiments, will provide a further detailed description. For those skilled in the art, this utility model can be implemented without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of this utility model by illustrating examples.

[0035] like Figure 1As shown, this utility model provides a technical solution for an indirect heating high-temperature atmosphere vertical shaft furnace: it includes a feeding device 1, which is used to continuously input the mixed materials. The feeding device 1 can be a screw feeder or other types of continuous feeding equipment to ensure that the materials can enter the vertical shaft furnace stably and continuously.

[0036] The pushing device 2 is connected to the feeding device 1 and is used to push the material to the material storage tube 3. The pushing device 2 can be a screw feeder with adjustable speed to match the feeding requirements of different materials and ensure the uniform distribution of materials in the vertical furnace.

[0037] The material storage pipe 3 is a vertical cylindrical container used to hold and transport materials. The upper end of the material storage pipe 3 is connected to the feeding device 1 and the pushing device 2 by bolts, and the lower end is connected to the reducing pipe 8, the discharging device 9 and the storage device 11 by bolts.

[0038] Heating rods 4 are distributed axially along the material storage tube 3 to provide a high-temperature heat source. Heating rods 4 can be arranged in sections, with the temperature of each section independently controlled, forming a temperature gradient of 800℃ to 1400℃ to meet the calcination requirements of different materials.

[0039] Insulation cotton 5 is wrapped around the outside of the material storage pipe 3 to reduce heat loss. The use of insulation cotton 5 can effectively reduce heat loss from the outside of the furnace and maintain the stability of the furnace temperature.

[0040] The insulation layer 6 is installed in multiple temperature zones of the material storage pipe 3 to achieve temperature gradient control. The insulation layer 6 can be composed of multiple layers of ceramic fiber boards, with air gaps between each layer to enhance the insulation effect.

[0041] The outer casing 7 is wrapped with insulation cotton 5 and a heat insulation layer 6 to form an integral structure. The outer layer of the outer casing 7 is coated with a high-temperature resistant and corrosion-resistant coating, and the inside is filled with aluminum silicate insulation material to protect the internal structure and improve the overall durability of the equipment.

[0042] The reducer 8 is connected to the bottom of the material storage pipe 3 and is used to adjust the material flow rate. The diameter of the reducer 8 gradually decreases from top to bottom to accelerate the falling of material and distribute it evenly.

[0043] The discharge device 9 is connected to the reducer 8 and is used to discharge the sintered material. The discharge device 9 can be a screw conveyor or other type of discharge equipment to ensure that the material can be smoothly discharged from the vertical furnace.

[0044] Atmosphere inlet 10 is located at the bottom of material storage tube 3 and is used to introduce protective gas. The gas introduced into atmosphere inlet 10 can be nitrogen or an inert gas, used to isolate oxygen during sintering and prevent material oxidation.

[0045] The storage device 11 is connected to the discharge device 9 and is used to collect and temporarily store finished materials. The storage device 11 is equipped with a sealing valve to ensure that the discharge process is isolated from the external environment and to prevent the materials from being contaminated.

[0046] This utility model's indirect heating high-temperature atmosphere vertical shaft furnace, through the implementation of the above-mentioned technical solution, can achieve uniform and efficient heating of materials, significantly improving energy utilization efficiency, reducing heat loss, and increasing calcination efficiency. It also boasts advantages such as small footprint, high filling rate, and simple operation. Through these technical features, this utility model has significant advantages in improving calcination efficiency, ensuring product quality, and reducing operating costs, and has broad application prospects and market value.

[0047] The working principle and usage process of this utility model are as follows: The mixed materials are continuously fed into the material storage tube 3 by the feeding device 1, and the materials are pushed into the material storage tube 3 by the pushing device 2. The heating rod 4 starts working, providing a high-temperature heat source, and the materials are uniformly heated in the material storage tube 3. The heat insulation cotton 5 and the heat insulation layer 6 work together to reduce heat loss and maintain the stability of the furnace temperature. At the same time, a protective gas is introduced through the atmosphere inlet 10 to isolate oxygen and prevent the materials from oxidizing. After being calcined at high temperature in the material storage tube 3, the materials fall rapidly and are evenly distributed through the reducing pipe 8, and are finally discharged smoothly through the discharge device 9. The storage device 11 collects and temporarily stores the finished materials, ensuring that the discharge process is isolated from the external environment and preventing the materials from being contaminated. Throughout the process, by adjusting the rotation speed of the pushing device 2 and the temperature of the heating rod 4, flexible calcination of different materials can be achieved to meet production needs.

[0048] 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.

[0049] The embodiments described above are not exhaustive, nor do they limit the invention to specific implementations. Clearly, many modifications and variations can be made based on the above description. These embodiments are selected and specifically described in this specification to better explain the principles and practical applications of the invention, enabling those skilled in the art to effectively utilize the invention and its modifications. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the invention should be included within the protection scope of the invention.

Claims

1. An indirect heating high-temperature atmosphere vertical furnace, characterized in that, include: Feeding device (1) for continuously feeding the mixture; The pushing device (2) is connected to the feeding device (1) and is used to push the material to the material storage tube (3); The material storage pipe (3) is a vertical cylindrical container used to hold and transport materials. Heating rods (4) are distributed axially along the material storage tube (3) to provide a high-temperature heat source; Thermal insulation cotton (5) is wrapped around the outside of the material storage tube (3) to reduce heat loss; A heat insulation layer (6) is provided in multiple temperature zones of the material storage tube (3) to achieve temperature gradient control; The equipment casing (7) wraps the insulation cotton (5) and the heat insulation layer (6) to form an integral structure; A reducing pipe (8) is connected to the bottom of the material storage pipe (3) and is used to adjust the material flow rate. The discharge device (9) is connected to the variable diameter pipe (8) and is used to output the sintered material; An atmosphere inlet (10) is located at the bottom of the material storage tube (3) and is used to introduce protective gas. The material storage device (11) is connected to the material discharge device (9) and is used to collect and temporarily store finished materials; The upper end of the material storage tube (3) is connected to the feeding device (1) and the pushing device (2) by bolts, and the lower end is connected to the variable diameter tube (8), the discharge device (9) and the storage device (11) by bolts.

2. The indirect heating high-temperature atmosphere vertical furnace according to claim 1, characterized in that: The heating rod (4) is arranged in sections along the axial direction of the material storage tube (3), and the temperature of each section is independently controlled to form a temperature gradient from 800°C to 1400°C.

3. The indirect heating high-temperature atmosphere vertical furnace according to claim 1, characterized in that: The insulation layer (6) is composed of multiple layers of ceramic fiberboard, with air gaps between each layer to enhance the insulation effect.

4. The indirect heating high-temperature atmosphere vertical furnace according to claim 1, characterized in that: The gas introduced through the atmosphere inlet (10) is nitrogen or an inert gas, used to isolate oxygen during the sintering process.

5. The indirect heating high-temperature atmosphere vertical furnace according to claim 1, characterized in that: The diameter of the reducing tube (8) gradually decreases from top to bottom, which is used to accelerate the falling of materials and distribute them evenly.

6. The indirect heating high-temperature atmosphere vertical furnace according to claim 1, characterized in that: The feeding device (2) is a screw feeder, whose speed is adjustable to match the feeding requirements of different materials.

7. The indirect heating high-temperature atmosphere vertical furnace according to claim 1, characterized in that: The storage device (11) is equipped with a sealing valve to ensure that the material discharge process is isolated from the external environment.

8. The indirect heating high-temperature atmosphere vertical furnace according to claim 1, characterized in that: The outer shell (7) of the equipment is coated with a high-temperature resistant and corrosion-resistant coating, and the interior is filled with aluminum silicate insulation material.

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