Kiln body structure with uniform heating temperature

Abstract

The utility model relates to the field of mica roasting, in particular to a uniform-temperature heating kiln body structure which comprises an outer-layer kiln body structure, an inner-layer kiln body structure is arranged in the outer-layer kiln body structure and is divided into three sections, a kiln body is divided into a preheating section, a roasting section and a cooling section along the length, and the temperature of each section is independently controlled. The front side of the inner-layer kiln body structure is rotationally connected with a door plate, a curved heat conduction steel pipe is installed on the door plate, reserved heating openings are formed in the left side and the right side in the inner-layer kiln body structure, and a backflow opening is formed in the rear side of the inner-layer kiln body structure. According to the mica roasting furnace, the uniformity and energy efficiency of mica roasting are remarkably improved through segmented independent temperature control, arc-shaped flow guide heat circulation and a waste heat recovery system, and heat loss is reduced by adopting the silicon carbide refractory bricks and the stainless steel composite heat preservation layer.

Description

Technical Field

[0001] This utility model relates to the field of mica roasting, and in particular to a kiln structure for uniformly heated kiln. Background Technology

[0002] Mica is an important layered silicate mineral widely used in electronics, insulating materials, and high-temperature industries. Its calcination process is crucial to product quality, requiring precise temperature control to avoid interlayer cracking or crystal defects. Traditional mica calcination kilns mostly use a whole-piece heating method, which has problems such as uneven temperature distribution and low thermal efficiency, resulting in some mica flakes being over- or under-calcined, affecting product performance. In existing technologies, some improved kilns adopt a multi-stage heating design, but the temperature control linkage between each stage is poor, making it difficult to achieve precise adjustment. The airflow circulation system mostly relies on forced convection, which can easily cause local airflow turbulence and affect the uniformity of calcination.

[0003] Therefore, in order to address the above problems, a kiln structure with uniform temperature heating is now being developed. Utility Model Content

[0004] In order to overcome the shortcomings of the existing technology, this utility model provides a kiln body structure with uniform temperature heating.

[0005] The technical solution of this utility model is as follows: A kiln structure for uniform temperature heating includes an outer kiln structure and an inner kiln structure inside the outer kiln structure. The outer layer is a high-temperature resistant stainless steel shell, and the inner layer is constructed with silicon carbide refractory bricks to reduce heat loss. The inner kiln structure is divided into three sections: a preheating section, a firing section, and a cooling section along the length of the kiln. Each section has independent temperature control. A door panel is rotatably connected to the front of the inner kiln structure, and a curved heat-conducting steel pipe is installed on the door panel. Pre-reserved heating ports are provided on the left and right sides inside the inner kiln structure, and a return port is opened on the rear side of the inner kiln structure. The return port is used to guide waste heat for recovery and reuse.

[0006] Preferably, the inner kiln structure also includes temperature detectors, with three temperature detectors installed in the inner kiln structure, each located in one of the three operating sections within the inner kiln structure.

[0007] Preferably, the system also includes a flow guiding structure, which is provided at the top of the inner kiln body structure to guide and circulate the hot airflow.

[0008] Preferably, the structure also includes a first exhaust port, with two symmetrical first exhaust ports on the top of the outer kiln structure and a second exhaust port at the middle of the top of the outer kiln structure. The opening diameter of the second exhaust port is larger than that of the first exhaust port. The first exhaust port corresponds to the preheating section and the cooling section, and the second exhaust port corresponds to the roasting section.

[0009] Preferably, a heat insulation pad is installed on the door panel.

[0010] Preferably, the flow guiding structure is an arc-shaped structure.

[0011] By adopting the above technical solution, the beneficial effects of this utility model are as follows:

[0012] This invention significantly improves the uniformity and energy efficiency of mica calcination through segmented independent temperature control, arc-shaped heat circulation, and waste heat recovery system. It uses silicon carbide refractory bricks and stainless steel composite insulation layer to reduce heat loss, optimizes airflow distribution through the flow guide structure to avoid local overheating, and reduces energy consumption by combining the graded design of the exhaust port with the waste heat utilization of the return port. Attached Figure Description

[0013] Figure 1 This is a three-dimensional structural diagram of the first state of this utility model.

[0014] Figure 2 This is a schematic diagram of the second state of the three-dimensional structure of this utility model.

[0015] Figure 3 This is a partial cross-sectional three-dimensional structural diagram of the present invention.

[0016] Reference numerals: 1_Outer kiln structure, 2_Inner kiln structure, 3_Door panel, 4_Insulation pad, 5_Curved heat-conducting steel pipe, 6_Reserved heating port, 7_Return port, 8_Temperature detector, 9_Flow guiding structure, 10_First exhaust port, 11_Second exhaust port. Detailed Implementation

[0017] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings.

[0018] A kiln structure for uniform temperature heating, such as Figures 1-3As shown, the kiln includes an outer kiln structure 1, inside which is an inner kiln structure 2. The outer layer is a high-temperature resistant stainless steel shell, and the inner layer is constructed with silicon carbide refractory bricks to reduce heat loss. The inner kiln structure 2 is divided into three sections along its length: a preheating section, a firing section, and a cooling section. Each section has independent temperature control. A rotating door panel 3 is connected to the front of the inner kiln structure 2. A heat insulation pad 4 is installed on the door panel 3, and a curved heat-conducting steel pipe 5 is installed on the door panel 3. Pre-reserved heating ports 6 are provided on the left and right sides inside the inner kiln structure 2. A return port 7 is opened on the rear side of the inner kiln structure 2 to guide residual heat. The inner kiln structure 2 is recyclable and reusable. It is equipped with three temperature detectors 8, which are located in three operating sections within the inner kiln structure 2. The top of the inner kiln structure 2 is equipped with a flow guide structure 9, which is an arc-shaped structure used to guide the circulation of hot air. The top of the outer kiln structure 1 is equipped with two symmetrical first exhaust ports 10. The middle position of the top of the outer kiln structure 1 is equipped with a second exhaust port 11, which has a larger opening diameter than the first exhaust ports 10. The first exhaust ports 10 correspond to the preheating section and the cooling section, and the second exhaust port 11 corresponds to the roasting section.

[0019] It should be noted that the outer high-temperature resistant stainless steel shell and the inner silicon carbide refractory brick form a composite insulation layer, effectively reducing heat loss. After opening the door panel 3, the mica raw material enters from the preheating section. It undergoes preliminary dehydration through the low-temperature waste heat guided by the first exhaust port 10, and then enters the calcination section. High-temperature gas is introduced through the reserved heating ports 6 on both sides, and the top arc-shaped guide structure 9 promotes the circulation of hot air, ensuring that the mica sheets are heated evenly. At this time, the high-temperature waste gas from the calcination section is concentratedly discharged through the second exhaust port 11. Finally, the material enters the cooling section, and the waste heat is introduced into the preheating section through the return port 7 to achieve heat recovery. Three temperature detectors are used. 8. Real-time monitoring of the temperature of each section, combined with an independent temperature control system for precise adjustment, enables dehydration in the preheating section, crystal phase transformation in the calcination section, and slow cooling in the cooling section. Meanwhile, the curved heat-conducting steel pipe 5 on the door panel 3 can balance the temperature fluctuation when the door is opened, while the heat insulation pad 4 further reduces heat loss. During the overall operation, the temperature inside the kiln is made uniform by mutual cooperation, preventing obvious problems of excessive temperature differences and improving the calcination quality. This segmented gradient heating and waste heat recycling design is particularly suitable for the thermal expansion characteristics of mica materials, which can avoid local overheating and interlayer cracking, and achieve energy-efficient utilization.

[0020] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit the scope of protection of this utility model. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the essence and scope of the technical solutions of this utility model.

Claims

1. A temperature-uniformly heated kiln body structure, characterized by, The utility model relates to a high-temperature resistant kiln, which comprises an outer kiln body structure (1) and an inner kiln body structure (2) arranged inside the outer kiln body structure (1), wherein the outer kiln body structure (1) is made of high-temperature resistant stainless steel, and the inner kiln body structure (2) is made of silicon carbide refractory bricks, thereby reducing heat loss; the inner kiln body structure (2) is divided into three sections, and the kiln body is divided into a preheating section, a baking section and a cooling section along the length, and each section is independently temperature-controlled; a door plate (3) is rotatably connected to the front side of the inner kiln body structure (2), and a curved heat-conducting steel pipe (5) is installed on the door plate (3); a heating port (6) is arranged on the left and right sides of the inner kiln body structure (2); a backflow port (7) is formed on the rear side of the inner kiln body structure (2), and the backflow port (7) is used for guiding the recovery and reuse of waste heat.

2. A kiln body structure of uniform temperature heating according to claim 1, wherein, The utility model further comprises a temperature detector (8), and three temperature detectors (8) are installed on the inner kiln body structure (2), and the temperature detectors (8) are respectively arranged in three operation sections in the inner kiln body structure (2).

3. A temperature uniformly heated kiln body structure according to claim 2, wherein The utility model further comprises a flow guide structure (9), and the flow guide structure (9) is arranged on the top of the inner kiln body structure (2) and is used for guiding the circulation of hot air.

4. A temperature uniformly heated kiln body structure according to claim 3, wherein The utility model further comprises a first air outlet (10), and two first air outlets (10) are symmetrically arranged on the top of the outer kiln body structure (1); a second air outlet (11) is arranged at the middle position of the top of the outer kiln body structure (1), and the opening diameter of the second air outlet (11) is larger than that of the first air outlet (10); the first air outlet (10) corresponds to the preheating section and the cooling section, and the second air outlet (11) corresponds to the baking section.

5. A temperature uniformly heated kiln body structure according to claim 1, wherein A heat insulation pad (4) is installed on the door plate (3).

6. A temperature uniformly heated kiln body structure according to claim 3, wherein The flow guide structure (9) is in an arc shape.

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