Chassis of reduction furnace

Abstract

The utility model discloses a chassis of a reduction furnace, which relates to the technical field of reduction furnaces and comprises an upper panel, a middle panel and a guide plate. The upper panel is located above the middle panel, the top ends of the flow guide plates are vertically welded to the bottom end face of the upper panel, expansion joints are arranged in the middles of the flow guide plates, the bottom ends of the flow guide plates are vertically attached to the top end face of the middle panel, cooling water flow channels are formed in cooling water cavities between every two adjacent flow guide plates, and electrode hole seats are arranged between the upper panel and the middle panel. And the electrode hole seat penetrates through the cooling water flow channel. The upper panel and the middle panel compress the expansion joint to enable the flow guide plate to be tightly attached to the middle panel, the expansion joint provides compensation force, it is guaranteed that the flow guide plate is tightly attached to the middle panel, and it is avoided that after the flow guide plate deforms, a gap is generated between the flow guide plate and the upper panel, and cooling water flows into the next flow channel from the gap, and consequently the heat exchange efficiency is reduced. Heat transfer fins are welded to the bottom end face of the upper panel and can improve the heat exchange efficiency of the upper panel and reduce the operation temperature of the upper panel.

Description

Technical Field

[0001] The utility model relates to the technical field of reduction furnaces, and more particularly to a reduction furnace chassis. Background Art

[0002] Currently, polysilicon manufacturers both domestically and internationally primarily produce polysilicon using the "Modified Siemens Process." The polysilicon reduction furnace is a key reactor for this process. Its design directly impacts polysilicon yield, quality, and production costs, and is crucial for controlling energy consumption throughout the production system. The reduction furnace chassis, a key component, contains cooling water channels that provide cooling water for the equipment.

[0003] In the prior art, the cooling water flow path of the reduction furnace chassis consists of a guide plate, a middle plate, an upper plate, and a cooling water jacket pipe. One end of the guide plate is vertically welded to the chassis middle plate, while the other end is vertically and tightly attached to the chassis upper plate. The chassis cooling water cavity is divided into two cooling water flow channels. Cooling water enters the cooling water flow channel through the exhaust jacket pipe inlet, flows along the flow channel from the chassis periphery, passes through each electrode hole seat, the intake pipe, and the chassis bracing member, and finally flows into the cooling water return pipe at the chassis center hole.

[0004] This cooling water channel structure resulted in poor heat exchange efficiency between the upper panel and the electrode orifice, and poor isolation and sealing performance of the guide plate. After the reduction furnace was put into operation, the guide plate deformed due to compression by the upper and middle panels. This deformation created a gap between the guide plate and the upper panel, causing some cooling water in the channel to flow directly into the next channel through the gap between the guide plate and the upper panel. This resulted in insufficient cooling water in the channel, reduced heat exchange efficiency, and compromised chassis operational safety and stability.

[0005] In the prior art, patent publication number CN201485284U discloses a polysilicon reduction furnace chassis with a centrally symmetrical double-helix guide channel, comprising a chassis flange, a sealing liner, a lower base plate, an upper base plate, a mixed gas inlet stub, a mixed gas outlet, a cooling water inlet, a cooling water outlet, an electrode holder, a sidewall cooling water inlet and outlet, and a first series of guide plates and a second series of guide plates. The first and second series of guide plates separate two identical guide channels within the enclosed cavity formed by the chassis flange, the lower base plate, and the upper base plate. The centrally symmetrical double-helix guide channel provided by the utility model allows cooling water to enter through the cooling water inlet at the center of the chassis flange, disperse into two equal streams, and flow smoothly into the guide channel. After removing heat from the chassis, it is discharged from the two cooling water outlets at the end of the guide channel, thereby shortening the cooling water flow path, ensuring more stable cooling water flow within the channel, enhancing the cooling effect, reducing the metal temperature difference on the chassis, and preventing chassis deformation.

[0006] The polysilicon reduction furnace chassis disclosed in the above patent also has the above-mentioned defects such as poor heat exchange efficiency between the upper panel and the electrode hole seat, and poor isolation and sealing performance of the guide plate, etc., in its cooling water flow channel structure. Utility Model Content

[0007] In order to overcome the defects existing in the above-mentioned prior art, the purpose of the present utility model is to provide a reduction furnace chassis to solve the problems of poor heat exchange efficiency between the upper panel and the electrode hole seat, and poor isolation and sealing performance of the guide plate in the cooling water flow channel of the reduction furnace chassis in the prior art.

[0008] In order to achieve the above objectives, the technical solution adopted by this utility model is:

[0009] A reduction furnace chassis comprises an upper panel, a middle panel and a guide plate;

[0010] The upper panel is located above the middle panel, the top of the guide plate is vertically welded to the bottom surface of the upper panel, an expansion joint is provided in the middle, and the bottom end is vertically attached to the top surface of the middle panel. The cooling water cavity between the two adjacent guide plates forms a cooling water flow channel, and an electrode hole seat is provided between the upper panel and the middle panel, and the electrode hole seat passes through the cooling water flow channel.

[0011] Preferably, heat transfer fins are welded to the bottom end surface of the upper panel, and the heat transfer fins extend downward into the cooling water flow channel.

[0012] Preferably, a spiral spoiler is provided on the side wall of the electrode hole seat.

[0013] Preferably, the upper panel and the middle panel are arranged in parallel.

[0014] Preferably, the expansion joint is a bellows expansion joint.

[0015] Preferably, the heat transfer fin is centrally welded to the top of the cooling water channel.

[0016] Preferably, the height of the guide plate is 65 mm, and the height of the heat transfer fin is 50 mm.

[0017] Preferably, the spiral spoiler is a 316L stainless steel plate with a thickness of 1 mm and a width of 5 mm, which is spirally wound and spot-welded on the outer surface from the top to the bottom of the electrode hole seat in the cooling water channel.

[0018] Preferably, the cooling water flow channel has a centrally symmetrical double helix structure.

[0019] Beneficial effects of the utility model:

[0020] 1. The reduction furnace chassis provided by the utility model has a top end of the guide plate vertically welded to the bottom end surface of the upper panel, an expansion joint is provided in the middle, and the bottom end is vertically fitted to the top end surface of the middle panel. The upper panel and the middle panel compress the expansion joint to make the guide plate fit tightly to the middle panel. The expansion joint provides compensation force to ensure the close fit of the guide plate and the middle panel, avoiding the problem of reduced heat exchange efficiency caused by the formation of a gap between the guide plate and the upper panel after the guide plate is deformed, and the cooling water flows into the next flow channel from the gap.

[0021] 2. The reduction furnace chassis provided by the present invention has heat transfer fins welded on the bottom end surface of the upper panel, which extend downward into the cooling water flow channel. The heat transfer fins can improve the heat exchange efficiency of the upper panel and reduce the operating temperature of the upper panel.

[0022] 3. The reduction furnace chassis provided by the present invention has spiral spoilers on the side walls of the electrode hole seats, which can increase the cooling water flow rate on the negative side of the electrode hole seats, improve the heat exchange efficiency of the electrode hole seats, and reduce the operating temperature of the electrode hole seats. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a structural diagram of the reduction furnace chassis of the utility model;

[0024] Figure 2 This is a top view of the chassis of the reduction furnace of the present invention;

[0025] Reference numerals:

[0026] 1. Upper panel; 2. Middle panel; 3. Guide plate; 4. Expansion joint; 5. Cooling water channel; 6. Electrode hole seat; 7. Heat transfer fin; 8. Spiral spoiler. DETAILED DESCRIPTION

[0027] The following will provide a clear and complete description of the concept, specific structure and technical effects of the present invention in conjunction with the embodiments and drawings, so as to fully understand the purpose, features and effects of the present invention.

[0028] Example 1

[0029] A reduction furnace chassis, such as Figure 1 and 2 As shown, it includes an upper panel 1, a middle panel 2 and a guide plate 3;

[0030] The upper panel 1 is located above the middle panel 2, the top of the guide plate 3 is vertically welded to the bottom surface of the upper panel 1, an expansion joint 4 is provided in the middle, and the bottom end is vertically attached to the top surface of the middle panel 2, the cooling water cavity between the two adjacent guide plates 3 forms a cooling water flow channel 5, and an electrode hole seat 6 is provided between the upper panel 1 and the middle panel 2, and the electrode hole seat 6 passes through the cooling water flow channel 5.

[0031] like Figure 1 As shown, the upper panel 1 and the middle panel 2 are arranged in parallel. The expansion joint 4 is a bellows expansion joint.

[0032] In this embodiment, the guide plate 3 is processed into a bellows expansion joint guide plate 3 with a wave, one end of which is vertically welded to the upper panel 1 of the chassis, and the other end of which is vertically and tightly fitted to the middle panel 2 of the chassis. After the reduction furnace is put into operation, the upper panel 1 and the middle panel 2 compress the bellows expansion joint 4 so that the guide plate 3 is tightly fitted to the middle panel 2. The bellows expansion joint 4 provides a compensating force to ensure the close fit between the guide plate 3 and the middle panel 2, thereby ensuring the heat exchange efficiency of the chassis. This avoids the problem of the guide plate 3 deforming and causing a gap between the guide plate 3 and the upper panel 1, which allows cooling water to flow into the next flow channel through the gap, resulting in insufficient cooling water in the flow channel, reduced heat exchange efficiency, and reduced safety and stability of the chassis operation.

[0033] Example 2

[0034] This embodiment is further described on the basis of embodiment 1. Figure 1 As shown, the bottom end surface of the upper panel 1 is welded with a heat transfer fin 7, which extends downward into the cooling water flow channel 5. The heat transfer fin 7 is welded centrally to the top of the cooling water flow channel 5. The height of the guide plate 3 is 65 mm, and the height of the heat transfer fin 7 is 50 mm.

[0035] In this embodiment, heat transfer fins 7 with a height of 50 mm are welded to the upper panel 1. The fin installation position is synchronized with the flow channel and is welded and installed in the center. The heat transfer fins 7 can improve the heat exchange efficiency of the upper panel 1 and reduce the operating temperature of the upper panel 1.

[0036] Example 3

[0037] This embodiment is further described on the basis of embodiment 2. Figure 1 As shown, the side wall of the electrode hole seat 6 is provided with a spiral spoiler 8. The spiral spoiler 8 is a 316L stainless steel plate with a thickness of 1mm and a width of 5mm, which is spirally wound and spot-welded from the outer surface of the top to the bottom of the electrode hole seat 6 in the cooling water flow channel 5.

[0038] In this embodiment, a spiral spoiler 8 is additionally provided on the outer surface of the electrode hole seat 6, and a 316L stainless steel plate with a thickness of 1 mm and a width of 5 mm is spirally wound and spot-welded from the top to the bottom of the outer surface of the electrode hole seat in the chassis cooling water flow channel to increase the cooling water flow rate on the negative side of the electrode hole seat, improve the heat exchange efficiency of the electrode hole seat, and reduce the operating temperature of the electrode hole seat.

[0039] In this embodiment, the cooling water flow channel 5 is a centrally symmetrical double helix structure, which is similar to the centrally symmetrical double helix guide channel of the CN201485284U patent in the background art and will not be described again here.

[0040] The new cooling water flow channel structure of this embodiment is used in reduction furnace chassis including 24-pair-rod reduction furnaces, 36-pair-rod reduction furnaces, 40-pair-rod reduction furnaces, 45-pair-rod reduction furnaces, 48-pair-rod reduction furnaces, 50-pair-rod reduction furnaces, 60-pair-rod reduction furnaces, 72-pair-rod reduction furnaces and other types of reduction furnace chassis. It can ensure the isolation and sealing performance of the guide plate, improve the heat exchange efficiency of the chassis, reduce the operating temperature of the upper panel and the electrode hole seat, and ensure the safe and stable operation of the chassis.

[0041] The above is a detailed description of the implementation methods of the present invention, but the present invention is not limited to the embodiments. Those skilled in the art may make various equivalent modifications or substitutions without violating the spirit of the present invention, and these equivalents or substitutions are all included in the scope defined by the claims of the present invention.

Claims

1. A reduction furnace chassis, characterized in that: It comprises an upper panel (1), a middle panel (2) and a guide plate (3); The upper panel (1) is located above the middle panel (2); the top end of the guide plate (3) is vertically welded to the bottom end surface of the upper panel (1); an expansion joint (4) is provided in the middle; the bottom end is vertically attached to the top end surface of the middle panel (2); a cooling water cavity between two adjacent guide plates (3) forms a cooling water flow channel (5); an electrode hole seat (6) is provided between the upper panel (1) and the middle panel (2); and the electrode hole seat (6) passes through the cooling water flow channel (5).

2. The reduction furnace chassis according to claim 1, characterized in that: A heat transfer fin (7) is welded to the bottom end surface of the upper panel (1), and the heat transfer fin (7) extends downward into the cooling water flow channel (5).

3. The reduction furnace chassis according to claim 1, characterized in that: A spiral spoiler (8) is provided on the side wall of the electrode hole seat (6).

4. The reduction furnace chassis according to claim 1, characterized in that: The upper panel (1) and the middle panel (2) are arranged in parallel.

5. The reduction furnace chassis according to claim 1, characterized in that: The expansion joint (4) is a bellows expansion joint.

6. The reduction furnace chassis according to claim 2, characterized in that: The heat transfer fin (7) is centrally welded to the top of the cooling water flow channel (5).

7. The reduction furnace chassis according to claim 2, characterized in that: The height of the guide plate (3) is 65 mm, and the height of the heat transfer fins (7) is 50 mm.

8. The reduction furnace chassis according to claim 3, characterized in that: The spiral spoiler (8) is a 316L stainless steel plate with a thickness of 1 mm and a width of 5 mm, which is spirally wound and spot-welded from the top to the bottom of the outer surface of the inner electrode hole seat (6) of the cooling water flow channel (5).

9. The reduction furnace bottom plate according to claim 1, wherein: The cooling water flow channel (5) is in a centrally symmetrical double helix structure.

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