A quartz glass powder calcination device with waste heat circulation

Abstract

This utility model relates to the field of quartz glass powder calcination technology, specifically disclosing a quartz glass powder calcination device with waste heat circulation. The device includes a base, and above the base, from left to right, are a feeding mechanism, a calcination mechanism, and a cooling mechanism. A fan draws outside cold air through a notch into the cooling chamber, allowing the cold air to exchange heat with the quartz glass powder. While cooling the quartz glass powder, the cold air is simultaneously heated. A stepped conveying system enables rapid cooling of the quartz glass powder, effectively improving the calcination efficiency. Hot air enters the calcination inner cylinder through a discharge pipe, mixing with the flue gas inside. The mixed flue gas is then conveyed to the preheating outer cylinder through a gas conveying pipe, where the heat from the mixed flue gas preheats the quartz glass powder in the conveying inner cylinder. This allows for the recovery and recycling of the heat contained in the discharged flue gas and the quartz glass powder after calcination.

Description

Technical Field

[0001] This utility model relates to the field of quartz glass powder calcination technology, and specifically discloses a quartz glass powder calcination device with waste heat circulation. Background Technology

[0002] Quartz glass powder calcination equipment is a specialized device for high-temperature processing of quartz powder materials (such as high-purity quartz sand and silica powder). By controlling the calcination temperature and time, it achieves crystal transformation, impurity removal, and performance optimization of quartz powder. As a key raw material in high-end fields such as optical communication and semiconductors, the quality of quartz glass powder directly depends on the calcination process. Traditional quartz powder calcination often uses rotary kilns or tunnel kilns.

[0003] Existing quartz glass powder calcination equipment generates a large amount of heat in both the exhaust gas and the calcined quartz glass powder itself during the calcination process. This equipment cannot recover and recycle the heat contained in the exhaust gas and the calcined quartz glass powder, resulting in significant energy waste. Furthermore, the quartz glass powder cools naturally after calcination, leading to a prolonged cooling time and severely impacting the calcination efficiency. Utility Model Content

[0004] This invention proposes a quartz glass powder calcination device with waste heat circulation, which can recover and recycle the heat contained in the exhaust gas and the quartz glass powder after calcination, avoiding heat energy waste, and improving the cooling efficiency of the quartz glass powder after calcination, thus effectively improving the calcination efficiency of the quartz glass powder.

[0005] This utility model is implemented as follows: a quartz glass powder calcination device with waste heat circulation includes a base, and a feeding mechanism, a calcination mechanism and a cooling mechanism are arranged sequentially from left to right on the top of the base.

[0006] The calcination mechanism includes a calcination outer cylinder fixedly connected to the upper end face of the base, and a calcination inner cylinder rotatably connected inside the calcination outer cylinder;

[0007] The feeding mechanism includes a preheating outer cylinder fixedly connected to the upper end face of the base, a conveying inner cylinder fixedly connected to the lower end of the preheating outer cylinder, a spiral conveying blade rotatably connected to the inside of the conveying inner cylinder, a material passage pipe connected between the conveying inner cylinder and the calcining inner cylinder, and a gas conveying pipe connected between the preheating outer cylinder and the calcining inner cylinder.

[0008] The cooling mechanism includes a cooling box fixedly connected to the upper surface of the base. Multiple vertically distributed conveyors are installed inside the cooling box, and the multiple conveyors are staggered. A discharge pipe connects the cooling box and the calcining inner cylinder. A notch is opened through the lower end of the right side wall of the cooling box, and the right end of the lowermost conveyor extends to the outside of the cooling box through the notch.

[0009] As a preferred embodiment of the quartz glass powder calcination device with waste heat circulation of this utility model, the outer wall of the calcination inner cylinder is fixedly connected to two driven gears distributed on the left and right, and the inner wall of the calcination outer cylinder is rotatably connected to a rotating shaft located above the calcination inner cylinder. The outer wall of the rotating shaft is fixedly connected to two driving gears that mesh with the two driven gears respectively.

[0010] As a preferred embodiment of the quartz glass powder calcination device with waste heat circulation according to this utility model, the upper end of the preheating outer cylinder is equipped with a fan whose air inlet end is connected to the preheating outer cylinder.

[0011] As a preferred embodiment of the quartz glass powder calcination device with waste heat circulation according to this utility model, a first drive motor is installed at the lower end of the preheating outer cylinder, and the output end of the first drive motor is fixedly connected to the spiral conveyor blade.

[0012] As a preferred embodiment of the quartz glass powder calcination device with waste heat circulation according to this utility model, a second drive motor is installed on the right side wall of the calcination outer cylinder, and the output end of the second drive motor is fixedly connected to the rotating shaft.

[0013] As a preferred embodiment of the quartz glass powder calcination device with waste heat circulation according to this utility model, a heating tube ring located between two driven gears is installed on the outer wall of the calcination inner cylinder.

[0014] As a preferred embodiment of the quartz glass powder calcination device with waste heat circulation according to this utility model, the outer wall of the preheating outer cylinder is fixedly connected to a feed trough that communicates with the conveying inner cylinder.

[0015] The beneficial effects of this utility model are:

[0016] A fan draws outside cold air into the cooling box through a gap, allowing the cold air to exchange heat with the quartz glass powder. While cooling the quartz glass powder, the cold air is heated. The stepped conveying method enables rapid cooling of the quartz glass powder, effectively improving the calcination efficiency of the quartz glass powder.

[0017] Hot air enters the calcination inner cylinder through the discharge pipe and mixes with the flue gas inside the calcination inner cylinder. The mixed flue gas is then transported to the preheating outer cylinder through the gas conveying pipe. The heat in the mixed flue gas is used to preheat the quartz glass powder in the conveying inner cylinder. This process recovers and recycles the heat contained in the discharged flue gas and the quartz glass powder after calcination, thus avoiding the waste of thermal energy. Attached Figure Description

[0018] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0020] Figure 2 This is a front cross-sectional view of the present invention.

[0021] Figure 3 This is a side view cross-sectional structural diagram of the calcination outer cylinder of this utility model.

[0022] The markings in the diagram are: 1. Base; 2. Calcination outer cylinder; 3. Calcination inner cylinder; 4. Feed chute; 5. Preheating outer cylinder; 6. Conveying inner cylinder; 7. Spiral conveyor blade; 8. Feed pipe; 9. Gas conveying pipe; 10. Cooling box; 11. Conveyor; 12. Discharge pipe; 13. Notch; 14. Driven gear; 15. Shaft; 16. Drive gear; 17. Fan; 18. First drive motor; 19. Second drive motor; 20. Heating ring. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings and specific embodiments to aid in understanding its content. Unless otherwise specified, the methods used in this invention are conventional methods; the raw materials and apparatus used, unless otherwise specified, are conventional commercially available products.

[0024] Please see Figure 1-3 A quartz glass powder calcination device with waste heat circulation includes a base 1, and a feeding mechanism, a calcination mechanism and a cooling mechanism are arranged sequentially from left to right on the top of the base 1.

[0025] The calcination mechanism includes a calcination outer cylinder 2 fixedly connected to the upper end face of the base 1, and a calcination inner cylinder 3 rotatably connected inside the calcination outer cylinder 2;

[0026] The feeding mechanism includes a preheating outer cylinder 5 fixedly connected to the upper end face of the base 1, a conveying inner cylinder 6 fixedly connected to the lower end of the preheating outer cylinder 5, a spiral conveying blade 7 rotatably connected inside the conveying inner cylinder 6, a material passage pipe 8 connected between the conveying inner cylinder 6 and the calcining inner cylinder 3, and a gas conveying pipe 9 connected between the preheating outer cylinder 5 and the calcining inner cylinder 3.

[0027] The cooling mechanism includes a cooling box 10 fixedly connected to the upper surface of the base 1. Multiple vertically distributed conveyors 11 are installed inside the cooling box 10. The multiple conveyors 11 are staggered. A discharge pipe 12 connects the cooling box 10 and the calcining inner cylinder 3. A notch 13 is opened through the lower end of the right side wall of the cooling box 10. The right end of the lowermost conveyor 11 extends to the outside of the cooling box 10 through the notch 13.

[0028] In this embodiment: During use, quartz glass powder is added to the inner conveying cylinder 6 through the feeding trough 4. Then, the spiral conveyor blade 7 rotates, conveying the quartz glass powder through the spiral conveyor blade 7 and into the calcining inner cylinder 3 through the feed pipe 8. The calcining inner cylinder 3 is then heated through the heating pipe ring 20. At the same time, the calcining inner cylinder 3 rotates, thereby efficiently calcining the quartz glass powder. After calcination, the quartz glass powder enters the cooling box 10 through the discharge pipe 12 and falls onto the top conveyor 11. Then, the quartz glass powder is conveyed in a stepped manner through multiple conveyors 11. At the same time, the fan 17 draws outside cold air into the cooling box 10 through the gap 13, allowing the cold air to exchange heat with the quartz glass powder. While cooling the quartz glass powder, the cold air is heated. The stepped conveying can quickly cool the quartz glass powder and effectively improve the calcination efficiency of the quartz glass powder.

[0029] The cooled quartz glass powder is then conveyed out of the cooling box 10 via the bottom conveyor 11. At the same time, hot air enters the calcination inner cylinder 3 through the discharge pipe 12 and mixes with the flue gas in the calcination inner cylinder 3. The mixed flue gas is then conveyed to the preheating outer cylinder 5 through the gas conveying pipe 9. The heat in the mixed flue gas is used to preheat the quartz glass powder in the conveying inner cylinder 6. This process recovers and recycles the heat contained in the discharged flue gas and the quartz glass powder after calcination, thus avoiding the waste of thermal energy.

[0030] As a technical optimization of this utility model, two driven gears 14 distributed on the left and right are fixedly connected to the outer wall of the calcining inner cylinder 3, and a rotating shaft 15 located above the calcining inner cylinder 3 is rotatably connected inside the calcining outer cylinder 2. Two driving gears 16 that mesh with the two driven gears 14 are fixedly connected to the outer wall of the rotating shaft 15.

[0031] In this embodiment: the rotating shaft 15 rotates, and the rotating shaft 15, together with two driving gears 16, drives two driven gears 14 to rotate, and the two driven gears 14 drive the calcining inner cylinder 3 to rotate.

[0032] As a technical optimization of this utility model, a fan 17 with an air inlet end connected to the preheating outer cylinder 5 is installed at the upper end of the preheating outer cylinder 5.

[0033] In this embodiment: the fan 17 can draw cold air from the outside through the notch 13 into the cooling box 10 for heat exchange, and then draw hot gas through the discharge pipe 12 into the calcining inner cylinder 3 to mix with the flue gas in the calcining inner cylinder 3. Then, the mixed flue gas is drawn through the gas conveying pipe 9 into the preheating outer cylinder 5 to preheat the quartz glass powder in the conveying inner cylinder 6.

[0034] As a technical optimization of this utility model, a first drive motor 18 is installed at the lower end of the preheating outer cylinder 5, and the output end of the first drive motor 18 is fixedly connected to the spiral conveyor blade 7.

[0035] In this embodiment, the first drive motor 18 can drive the spiral conveyor blade 7 to rotate.

[0036] As a technical optimization of this utility model, a second drive motor 19 is installed on the right side wall of the calcining outer cylinder 2, and the output end of the second drive motor 19 is fixedly connected to the rotating shaft 15.

[0037] In this embodiment, the second drive motor 19 can drive the rotating shaft 15 to rotate.

[0038] As a technical optimization of this utility model, a heating tube ring 20 located between two driven gears 14 is installed on the outer wall of the calcining inner cylinder 3.

[0039] In this embodiment, the calcining inner cylinder 3 can be heated by the heating tube ring 20.

[0040] As a technical optimization of this utility model, the outer wall of the preheating outer cylinder 5 is fixedly connected to a feed trough 4 that communicates with the conveying inner cylinder 6.

[0041] In this embodiment, the feed trough 4 facilitates the addition of quartz glass powder into the inner conveying cylinder 6.

[0042] The working principle and usage process of this utility model are as follows: In use, quartz glass powder is added to the inner conveying cylinder 6 through the feeding trough 4. Then, the first drive motor 18 drives the spiral conveying blade 7 to rotate, conveying the quartz glass powder through the spiral conveying blade 7 and allowing it to enter the calcining inner cylinder 3 through the material pipe 8. The calcining inner cylinder 3 is then heated by the heating ring 20. Simultaneously, the second drive motor 19 drives the rotating shaft 15 to rotate. The rotating shaft 15, in conjunction with two driving gears 16, drives two driven gears 14 to rotate, which in turn drives the calcining inner cylinder 3 to rotate, thus efficiently heating the quartz glass powder. The quartz glass powder is calcined, and the calcined quartz glass powder enters the cooling box 10 through the discharge pipe 12. The calcined quartz glass powder falls onto the top conveyor 11, and then the quartz glass powder is conveyed in a stepped manner through multiple conveyors 11. At the same time, the fan 17 draws outside cold air into the cooling box 10 through the opening 13, so that the cold air exchanges heat with the quartz glass powder, cooling the quartz glass powder while heating the cold air. The stepped conveying can quickly cool the quartz glass powder and effectively improve the calcination efficiency of the quartz glass powder.

[0043] The cooled quartz glass powder is then conveyed out of the cooling box 10 via the bottom conveyor 11. At the same time, hot air enters the calcination inner cylinder 3 through the discharge pipe 12 and mixes with the flue gas in the calcination inner cylinder 3. The mixed flue gas is then conveyed to the preheating outer cylinder 5 through the gas conveying pipe 9. The heat in the mixed flue gas is used to preheat the quartz glass powder in the conveying inner cylinder 6. This process recovers and recycles the heat contained in the discharged flue gas and the quartz glass powder after calcination, thus avoiding the waste of thermal energy.

[0044] In the description of this utility model, it should be understood that the terms "left", "right", "up", "down", "top", "bottom", "front", "back", "inner", "outer", "back", "middle", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0045] However, the above description is only a specific embodiment of this utility model and should not be construed as limiting the scope of implementation of this utility model. Therefore, any substitution of equivalent components or equivalent changes and modifications made in accordance with the scope of protection of this utility model should still fall within the scope of the claims of this utility model.

Claims

1. A quartz glass powder calcination device with waste heat circulation, comprising a base (1), characterized in that: The base (1) is provided with a feeding mechanism, a calcining mechanism and a cooling mechanism from left to right above it; The calcination mechanism includes a calcination outer cylinder (2) fixedly connected to the upper end face of the base (1), and a calcination inner cylinder (3) is rotatably connected inside the calcination outer cylinder (2). The feeding mechanism includes a preheating outer cylinder (5) fixedly connected to the upper end face of the base (1), a conveying inner cylinder (6) fixedly connected to the lower end of the preheating outer cylinder (5), a spiral conveying blade (7) rotatably connected to the inside of the conveying inner cylinder (6), a feed pipe (8) connected between the conveying inner cylinder (6) and the calcining inner cylinder (3), and a gas conveying pipe (9) connected between the preheating outer cylinder (5) and the calcining inner cylinder (3). The cooling mechanism includes a cooling box (10) fixedly connected to the upper surface of the base (1). The cooling box (10) is equipped with multiple vertically distributed conveyors (11). The multiple conveyors (11) are staggered. The cooling box (10) is connected to the calcining inner cylinder (3) by a discharge pipe (12). The lower end of the right side wall of the cooling box (10) is provided with a notch (13). The right end of the lowermost conveyor (11) extends to the outside of the cooling box (10) through the notch (13).

2. The quartz glass powder calcination device with waste heat circulation according to claim 1, characterized in that: The outer wall of the calcining inner cylinder (3) is fixedly connected to two driven gears (14) distributed on the left and right. The inner wall of the calcining outer cylinder (2) is rotatably connected to a rotating shaft (15) located above the calcining inner cylinder (3). The outer wall of the rotating shaft (15) is fixedly connected to two driving gears (16) that mesh with the two driven gears (14).

3. The quartz glass powder calcination device with waste heat circulation according to claim 1, characterized in that: The upper end of the preheating outer cylinder (5) is equipped with a fan (17) whose air inlet end is connected to the preheating outer cylinder (5).

4. The quartz glass powder calcination device with waste heat circulation according to claim 1, characterized in that: The lower end of the preheating outer cylinder (5) is equipped with a first drive motor (18), and the output end of the first drive motor (18) is fixedly connected to the spiral conveyor blade (7).

5. A quartz glass powder calcination device with waste heat circulation according to claim 2, characterized in that: A second drive motor (19) is installed on the right side wall of the calcining outer cylinder (2), and the output end of the second drive motor (19) is fixedly connected to the rotating shaft (15).

6. The quartz glass powder calcination device with waste heat circulation according to claim 2, characterized in that: The outer wall of the calcining inner cylinder (3) is fitted with a heating tube ring (20) located between two driven gears (14).

7. The quartz glass powder calcination device with waste heat circulation according to claim 1, characterized in that: The outer wall of the preheating outer cylinder (5) is fixedly connected to a feed trough (4) that communicates with the conveying inner cylinder (6).

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