Fixed tube plate heat exchanger for silicon powder drying processing

Abstract

The utility model relates to the technical field of fixed tube-sheet heat exchangers, in particular to a fixed tube-sheet heat exchanger for silicon powder drying processing, which comprises a tube-sheet heat exchanger body, a hot water inlet pipe is fixedly connected to the outer wall of the tube-sheet heat exchanger body, and a cleaning sleeve for collecting silicon powder impurities is fixedly arranged below the outer wall of the tube-sheet heat exchanger body through welding. A limiting groove is formed in the top of the hot water inlet pipe, a filter screen cylinder for filtering silicon powder is arranged in the limiting groove, a triangular folded plate is fixedly connected to the bottom of the inner wall of the tube plate heat exchanger body, a notch communicated with the cleaning sleeve is formed in the right side of the triangular folded plate, and a cleaning mechanism for cleaning the silicon powder is arranged in the cleaning sleeve. The triangular folded plates are arranged at the bottom of the inner wall of the tube plate heat exchanger body, and the structure of a traditional vertical folded plate is changed. Due to the triangular design, silicon powder in hot water is difficult to accumulate between the folded plates, the influence of accumulation of the silicon powder on the heat transfer efficiency is reduced, and efficient operation of the heat exchanger is guaranteed.

Description

Technical Field

[0001] This utility model relates to the field of fixed tube sheet heat exchangers, and in particular to a fixed tube sheet heat exchanger for silicon powder drying and processing. Background Technology

[0002] In the silicon powder drying process, the efficient utilization and precise transfer of heat energy directly affect production efficiency and product quality. Fixed tube sheet heat exchangers, as a common heat exchange device, are widely used in silicon powder drying systems due to their compact structure and low manufacturing cost, undertaking key tasks such as heating the drying medium or recovering waste heat.

[0003] Existing fixed tube sheet heat exchangers, such as the one disclosed in CN216081084U, employ a design with baffles installed inside the shell. This causes the hot fluid to flow in multiple directions, increasing the contact area between the hot fluid and the outer surface of the heat exchange tubes, thus enabling rapid heat exchange and improving the heat exchange efficiency of the device. However, the vertical baffle design leads to the accumulation of silica powder carried in the hot water between the baffles. This silica powder accumulation not only significantly reduces the heat transfer efficiency of the heat exchanger and affects the progress and effect of silica powder drying, but also makes cleaning the accumulated silica powder extremely difficult, requiring significant manpower and time costs, severely impacting the continuity and economy of production. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing vertical folding plate designs, which easily lead to the accumulation of silicon powder in hot water between the folding plates, reducing heat transfer efficiency and making cleaning difficult. Therefore, a fixed tube sheet heat exchanger for silicon powder drying and processing is proposed.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A fixed tube sheet heat exchanger for drying silicon powder includes a tube sheet heat exchanger body. A hot water inlet pipe is fixedly connected to the outer wall of the tube sheet heat exchanger body. A cleaning sleeve for collecting silicon powder impurities is fixedly installed by welding on the lower part of the outer wall of the tube sheet heat exchanger body. A limiting groove is opened at the top of the hot water inlet pipe, and a filter screen for filtering silicon powder is installed in the limiting groove. A triangular folding plate is fixedly connected to the bottom of the inner wall of the tube sheet heat exchanger body. A notch is opened on the right side of the triangular folding plate, which communicates with the cleaning sleeve. A cleaning mechanism for cleaning silicon powder is installed in the cleaning sleeve.

[0007] Preferably, a limiting block is fixedly connected to the outer wall of the filter cylinder, the limiting block is slidably engaged with the limiting groove, a handle is rotatably connected to the top of the limiting block, a fixing block is fixedly connected to the bottom of the filter cylinder, and a flow sensor for monitoring the flow rate of hot water is embedded on the opposite side of the fixing block.

[0008] Preferably, the left port of the cleaning sleeve is connected to a sealing cap via a flange, and the right outer wall of the cleaning sleeve has a threaded hole.

[0009] Preferably, a threaded cap is threaded into the threaded hole, and a high-temperature resistant sealing gasket is fitted onto the threaded cap.

[0010] Preferably, the cleaning mechanism includes a cleaning brush plate, and the cleaning brush plate has a threaded groove on the side near the threaded hole, and a cleaning rod is threadedly connected in the threaded groove.

[0011] Preferably, the shape and size of the cleaning brush plate are adapted to and slidably fitted to the inner wall of the cleaning sleeve, and the cleaning rod passes through the threaded hole and is threadedly connected to the threaded groove.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] 1. In use, this utility model can change the traditional vertical folding plate structure by setting triangular folding plates at the bottom of the inner wall of the tube sheet heat exchanger body. This triangular design makes it difficult for silica powder in hot water to accumulate between the folding plates, reducing the impact of silica powder accumulation on heat transfer efficiency and ensuring the efficient operation of the heat exchanger.

[0014] 2. In use, this utility model can use the limiting groove at the top of the hot water inlet pipe in conjunction with the filter screen to perform preliminary filtration of the hot water entering the heat exchanger, effectively intercepting silica powder in the hot water. The limiting block on the outer wall of the filter screen slides in conjunction with the limiting groove, making it easy to disassemble and clean. Furthermore, the flow sensor embedded in the bottom fixing block can monitor the hot water flow in real time, providing data support for equipment operation and facilitating timely adjustment of equipment operating parameters by the staff.

[0015] 3. In use, this utility model allows the cleaning sleeve and the triangular folding plate notch to interlock, enabling accumulated silicon powder to fall smoothly into the cleaning sleeve. The cleaning mechanism facilitates the removal of silicon powder from the cleaning sleeve. The cleaning brush plate is adapted to and slides within the inner wall of the cleaning sleeve. By rotating the cleaning rod, the cleaning brush plate slides within the cleaning sleeve, quickly and effectively removing the silicon powder. Simultaneously, the sealing cap on the left side of the cleaning sleeve and the threaded cap and sealing gasket on the right side ensure the sleeve's airtightness, preventing heat loss and silicon powder leakage, making the cleaning process safer and more convenient. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of a fixed tube sheet heat exchanger for silicon powder drying and processing proposed in this utility model;

[0017] Figure 2This is a half-sectional three-dimensional structural diagram of a fixed tube sheet heat exchanger for silicon powder drying and processing proposed in this utility model.

[0018] Figure 3 This is a three-dimensional structural diagram of the hot water inlet pipe of a fixed tube sheet heat exchanger for silicon powder drying and processing proposed in this utility model.

[0019] Figure 4 This is a three-dimensional structural diagram of the filter screen cylinder of a fixed tube sheet heat exchanger for silicon powder drying and processing proposed in this utility model.

[0020] Figure 5 This is an enlarged view of the cleaning mechanism of a fixed tube sheet heat exchanger for silicon powder drying and processing proposed in this utility model;

[0021] Figure 6 This is a three-dimensional structural diagram of a cleaning brush plate and cleaning rod for a fixed tube sheet heat exchanger used in silicon powder drying and processing, as proposed in this utility model.

[0022] In the diagram: 1. Tube sheet heat exchanger body; 2. Hot water inlet pipe; 3. Cleaning sleeve; 4. Limiting groove; 5. Filter screen cylinder; 6. Triangular folding plate; 7. Notch; 8. Cleaning mechanism; 9. Sealing cover; 10. Threaded hole; 11. Threaded cap; 12. Cleaning brush; 13. Threaded groove; 14. Cleaning rod; 15. External thread; 51. Limiting block; 52. Handle; 53. Fixing block; 54. Flow sensor. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0024] Reference Figures 1-6 A fixed tube sheet heat exchanger for silicon powder drying and processing includes a tube sheet heat exchanger body 1. The tube sheet heat exchanger body 1 is a prior art used in this field. By setting the baffles, the hot fluid is deflected in multiple directions during flow, increasing the contact area between the hot fluid and the outer surface of the heat exchange tube, so as to facilitate rapid heat exchange between the hot fluid and the heat exchange tube and improve the heat exchange effect. Therefore, it will not be described in detail.

[0025] A hot water inlet pipe 2 is fixedly connected to the outer wall of the tube sheet heat exchanger body 1. A cleaning sleeve 3 for collecting silicon powder impurities is fixedly installed by welding on the lower part of the outer wall of the tube sheet heat exchanger body 1. A limiting groove 4 is opened at the top of the hot water inlet pipe 2. A filter screen cylinder 5 for filtering silicon powder is installed in the limiting groove 4. A triangular folding plate 6 is fixedly connected to the bottom of the inner wall of the tube sheet heat exchanger body 1. The two sides of the triangular folding plate 6 are inclined at 15°. A notch 7 is opened on the right side of the triangular folding plate 6, which is connected to the cleaning sleeve 3. A cleaning mechanism 8 for cleaning silicon powder is installed in the cleaning sleeve 3.

[0026] The cleaning sleeve 3 is made of thickened stainless steel, which has excellent wear resistance and corrosion resistance. It can withstand the frequent impact and scraping of silicon powder impurities. The bottom of the inner wall of the cleaning sleeve 3 is inclined. With the notch 7 that is connected to the triangular folding plate 6, the silicon powder impurities are automatically guided and collected by gravity, which effectively avoids the accumulation and blockage of impurities.

[0027] Furthermore, a limiting block 51 is fixedly connected to the outer wall of the filter cylinder 5. The limiting block 51 slides with the limiting groove 4. A handle 52 is rotatably connected to the top of the limiting block 51. A fixing block 53 is fixedly connected to the bottom of the filter cylinder 5. A flow sensor 54 for monitoring the flow of hot water is embedded on the opposite side of the fixing block 53.

[0028] The filter cylinder 5 is made of high-strength stainless steel wire mesh with precisely designed mesh openings. It can effectively intercept silicon powder particles to prevent them from entering the hot water inlet pipe 2 and affecting the flow of hot water and heat exchange efficiency, while ensuring the smooth passage of hot water. The top rotating handle 52 is ergonomically designed to make it easy for operators to lift the filter cylinder 5 for cleaning and replacement.

[0029] Furthermore, a sealing cap 9 is connected to the left port of the cleaning sleeve 3 via a flange, and a threaded hole 10 is provided on the right outer wall of the cleaning sleeve 3.

[0030] The sealing cap 9 is provided with a high-temperature resistant rubber material between the left side port of the cleaning sleeve 3 and the sealing cap 9. This material can fit tightly against the left side port of the cleaning sleeve 3 under high temperature and high pressure conditions, effectively preventing the leakage of silicon powder impurities and the entry of outside air.

[0031] Furthermore, a threaded cap 11 is threaded into the threaded hole 10, and a high-temperature resistant sealing gasket is fitted on the threaded cap 11.

[0032] The high-temperature resistant sealing gasket is made of polytetrafluoroethylene, which has excellent sealing performance and high-temperature resistance. It can effectively prevent leakage at the connection between the cleaning mechanism 8 and the cleaning sleeve 3, ensuring the smooth progress of the cleaning work, while protecting the inside of the equipment from the influence of the external environment.

[0033] Furthermore, the cleaning mechanism 8 includes a cleaning brush plate 12, and a threaded groove 13 is provided on the side of the cleaning brush plate 12 near the threaded hole 10, and a cleaning rod 14 is threadedly connected in the threaded groove 13.

[0034] The cleaning brush 12 is made of polyphenylene sulfide (PPS) material, which fits tightly against the inner wall of the cleaning sleeve 3, effectively removing silicon powder impurities attached to the inner wall of the sleeve.

[0035] Furthermore, the shape and size of the cleaning brush plate 12 are adapted to and slidably fitted to the inner wall of the cleaning sleeve 3, and the cleaning rod 14 passes through the threaded hole 10 and is threadedly connected to the threaded groove 13.

[0036] One end of the cleaning rod 14 is provided with an external thread 15, which is adapted to and threadedly connected to the threaded groove 13. The connection between the cleaning rod 14 and the threaded groove 13 through the threaded hole 10 makes the installation and disassembly of the cleaning mechanism 8 simple and convenient, and facilitates daily maintenance and repair.

[0037] Working principle:

[0038] Hot fluid enters the tube sheet heat exchanger body 1 through the hot water inlet pipe 2. The filter screen 5 intercepts silicon powder particles. The flow sensor 54 monitors the hot water flow in real time. The hot fluid is guided by the triangular baffle 6 and deflects in multiple directions. After making full contact with the heat exchange tube, heat exchange is completed. Silicon powder impurities enter the cleaning sleeve 3 through the notch 7 with the fluid. The cleaning mechanism 8 drives the cleaning brush 12 to slide along the inner wall of the sleeve by rotating the cleaning rod 14. The cleaning brush 12 removes the attached impurities. The impurities are concentrated at the end of the sealing cover 9 under the guidance of the inclined bottom wall. The sealing cover 9 is opened periodically to clean the impurities. The filter screen 5 is lifted for maintenance by the handle 52. The threaded cap 11 ensures the sealing of the cleaning mechanism 8.

[0039] This device achieves high-efficiency operation through a synergistic design of filtration, heat exchange, collection, and cleaning. The filter cylinder 5 intercepts particles to ensure fluid cleanliness, the baffle plate enhances heat exchange efficiency, and the inclined cleaning sleeve 3, in conjunction with the rotating cleaning mechanism 8, enables automatic collection and removal of impurities. The modular structure facilitates maintenance, and the whole system forms a closed-loop silicon powder treatment system.

[0040] 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.

Claims

1. A fixed tube sheet heat exchanger for silicon powder drying and processing, comprising a tube sheet heat exchanger body (1), characterized in that, A hot water inlet pipe (2) is fixedly connected to the outer wall of the tube sheet heat exchanger body (1). A cleaning sleeve (3) for collecting silicon powder impurities is fixedly installed below the outer wall of the tube sheet heat exchanger body (1) by welding. A limiting groove (4) is opened at the top of the hot water inlet pipe (2). A filter screen cylinder (5) for filtering silicon powder is installed in the limiting groove (4). A triangular folding plate (6) is fixedly connected to the bottom of the inner wall of the tube sheet heat exchanger body (1). A notch (7) is opened on the right side of the triangular folding plate (6) and communicates with the cleaning sleeve (3). A cleaning mechanism (8) for cleaning silicon powder is installed in the cleaning sleeve (3).

2. The fixed tube sheet heat exchanger for silicon powder drying and processing according to claim 1, characterized in that, The filter cylinder (5) is fixedly connected to a limiting block (51) on its outer wall. The limiting block (51) is slidably engaged with the limiting groove (4). A handle (52) is rotatably connected to the top of the limiting block (51). A fixing block (53) is fixedly connected to the bottom of the filter cylinder (5). A flow sensor (54) for monitoring hot water flow is embedded on the opposite side of the fixing block (53).

3. A fixed tube sheet heat exchanger for silicon powder drying and processing according to claim 1, characterized in that, The left port of the cleaning sleeve (3) is connected to a sealing cap (9) via a flange, and the right outer wall of the cleaning sleeve (3) is provided with a threaded hole (10).

4. A fixed tube sheet heat exchanger for silicon powder drying and processing according to claim 3, characterized in that, The threaded hole (10) is threaded with a threaded cap (11), and a high-temperature resistant sealing gasket is fitted on the threaded cap (11).

5. A fixed tube sheet heat exchanger for silicon powder drying and processing according to claim 3, characterized in that, The cleaning mechanism (8) includes a cleaning brush plate (12), and a threaded groove (13) is provided on the side of the cleaning brush plate (12) near the threaded hole (10), and a cleaning rod (14) is threadedly connected in the threaded groove (13).

6. A fixed tube sheet heat exchanger for silicon powder drying and processing according to claim 5, characterized in that, The shape and size of the cleaning brush plate (12) are adapted to the inner wall of the cleaning sleeve (3) and slide in fit. The cleaning rod (14) passes through the threaded hole (10) and is threadedly connected to the threaded groove (13).

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