Rectification column for methyltrichlorosilane purification

Abstract

The utility model discloses a rectifying column for methyltrichlorosilane purification, including tower body and regular filling, the left and right sides of tower body are installed with connecting block, and connecting block is welded with tower body, regular filling is installed in the inside of tower body, and the below of regular filling is installed with support subassembly, the below of support subassembly is installed with backing pad, and the below of backing pad is welded with screw rod. This rectifying column for methyltrichlorosilane purification compares with the existing rectifying column, and the height of three groups of backing pads is adjusted to the level of the level gauge, and then the fastening nut is used to fix the screw rod to prevent loosening. The regular filling is placed on the support frame with a ninety-degree staggered angle, the two clamping rods are pushed to move closer to each other along the slide rod to make the spring contract, the clamping rod is released after being placed on the surface of the uppermost layer of the filling, the spring rebounds to make the clamping rod tightly contact the inner wall of the tower body, the stable fixation of the filling is realized, when the mass transfer efficiency is reduced due to the accumulation of pollutants, the bolt is unscrewed to remove the cover plate, and the filling can be cleaned or replaced.

Description

Technical Field

[0001] This utility model relates to the field of methyltrichlorosilane purification technology, specifically to a distillation column for methyltrichlorosilane purification. Background Technology

[0002] Methyltrichlorosilane (CH3SiCl3) is a colorless, transparent, volatile liquid with a boiling point of 57°C and a density of 0.854 g / cm³. 3 It is highly hydrolyzable and corrosive, reacting violently with water to produce hydrogen chloride and silicic acid. It is widely used in the synthesis of organosilicon compounds (such as silicone resins and waterproofing agents) and in organic reactions (such as the Sven oxidation reaction). Industrially, it is mainly prepared by methylchlorosilane chlorination or silane chlorination. Purification requires distillation (to control temperature and prevent decomposition) or inert gas protection (such as nitrogen) to avoid hydrolysis. Strict protective measures are necessary during handling due to its flammability, strong irritant effect on eyes and respiratory tract, and avoidance of contact with water or oxidizers.

[0003] Existing purification processes for methyltrichlorosilane generally rely on distillation columns for separation and purification. However, the structured packing materials used in traditional distillation columns experience a decline in mass transfer performance due to the gradual accumulation of contaminants during long-term operation. When the packing surface is covered with reaction byproducts or polymers, the separation efficiency decreases significantly, necessitating cleaning or replacement of the packing material. Current maintenance methods have significant limitations: firstly, they require shutdown and disassembly of the column, a complex and time-consuming process; secondly, the violent exothermic reaction of methyltrichlorosilane with water poses safety risks to wet cleaning, while manual entry into the column carries the risk of exposure to toxic gases. This maintenance model not only affects continuous production efficiency but also risks safety accidents, necessitating the development of new distillation columns. Utility Model Content

[0004] The purpose of this invention is to provide a distillation column for purifying methyltrichlorosilane, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a distillation column for purifying methyltrichlorosilane, comprising a column body and structured packing, wherein connecting blocks are installed on the left and right sides of the column body and the connecting blocks are welded to the column body, the structured packing is installed inside the column body, and a support assembly is installed below the structured packing, a pad is installed below the support assembly, and a screw is welded below the pad.

[0006] Furthermore, a fastening nut is installed in the middle of the screw, and the fastening nut is threadedly connected to the screw. Rotating the fastening nut will fix the screw, prevent the screw from loosening, and ensure that the support frame remains horizontal.

[0007] Furthermore, the support assembly includes a support frame and a level, with the level installed in the center of the support frame. The height of the three sets of pads is changed by rotating the screw until the level on the support frame shows horizontal.

[0008] Furthermore, a clamping rod is installed above the structured packing, and a sliding rod is slidably connected inside the clamping rod. When the two clamping rods are pulled closer to each other on the sliding rod, the spring is compressed and contracts, making it easy to place on the uppermost structured packing surface.

[0009] Furthermore, a spring is installed around the slide rod, and the spring and the slide rod are slidably connected. When the clamping rod is placed on the uppermost layer of structured packing and the clamping rod is released, the clamping rod is springed open by the spring and pressed against the inner wall of the tower body, thereby fixing the structured packing between the support frame and the clamping rod.

[0010] Furthermore, a sealing gasket is installed at the front end of the side wall of the tower body, and a cover plate is installed around the sealing gasket. The screw ensures that the interference fit sealing gasket fills the gap between the cover plate and the tower body, thus ensuring the sealing performance of the tower body.

[0011] Furthermore, an observation window is installed inside the cover plate, and the observation window is embedded in the cover plate. The surface condition of the structured packing is observed through the observation window, which makes it easy to detect the decline in mass transfer efficiency caused by the accumulation of pollutants after long-term use of the structured packing.

[0012] Furthermore, bolts are installed on the left and right sides of the cover plate, and the bolts are embedded in the cover plate. Multiple sets of bolts are provided for better fixing effect.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: The support frame is placed on the pads, and the height of the three sets of pads is adjusted by rotating the screw until the level indicator shows horizontal. The screw is then tightened to prevent loosening. The structured packing is placed on the support frame at a staggered 90-degree angle. The two clamping rods are pushed closer together along the sliding rod to compress the springs. The clamping rods are then placed on the surface of the uppermost packing layer and released. The springs rebound, causing the clamping rods to press firmly against the inner wall of the tower body, thus achieving stable fixing of the packing. The surface condition of the packing is monitored through the observation window. When contaminant accumulation leads to a decrease in mass transfer efficiency, the bolts are loosened and the cover plate is removed for cleaning or replacement of the packing. During reinstallation, the screw drives the sealing gasket to interference fill the gap between the cover plate and the tower body, ensuring sealing performance. 1. This utility model places the support frame on the pads, and changes the height of the three sets of pads by rotating the screw until the level on the support frame shows horizontal. Then, the fastening nut is rotated to fix the screw and prevent it from loosening, ensuring that the support frame remains horizontal. The structured packing is placed on the support frame with the packing staggered by 90 degrees. The two clamping rods are pulled closer to each other on the sliding rod. The spring is compressed and contracted. The clamping rods are placed on the uppermost layer of structured packing. The clamping rods are released, and the clamping rods are springed open by the spring and pressed against the inner wall of the tower body, thereby fixing the structured packing between the support frame and the clamping rods. This facilitates the fixing of structured packing of different specifications and ensures horizontality. 2. This utility model allows observation of the structured packing surface through an observation window. When the mass transfer efficiency decreases due to the accumulation of contaminants after prolonged use, the bolts can be loosened to remove the cover plate from the tower body, thereby opening the corresponding installation area of ​​the structured packing on the tower body. This facilitates the removal, cleaning, or replacement of the structured packing. The cover plate can be reinstalled on the tower body by reversing the operation. The screw ensures that the interference fit sealing gasket fills the gap between the cover plate and the tower body, ensuring the sealing performance of the tower body. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the distillation column for purifying methyltrichlorosilane according to this invention; Figure 2 This is a schematic diagram of the opening structure of the cover plate of the distillation column for purifying methyltrichlorosilane according to this utility model; Figure 3 This is a three-dimensional structural diagram of the support components of the distillation column for purifying methyltrichlorosilane according to this invention.

[0015] In the diagram: 1. Tower body; 2. Cover plate; 3. Observation window; 4. Connecting block; 5. Bolt; 6. Sealing gasket; 7. Clamping rod; 8. Sliding rod; 9. Spring; 10. Structured packing; 11. Support assembly; 1101. Support frame; 1102. Level; 12. Pad; 13. Screw; 14. Fastening nut Detailed Implementation like Figure 1-3As shown, a distillation column for purifying methyltrichlorosilane includes a column body 1 and structured packing 10. The column body 1 is characterized by connecting blocks 4 installed on its left and right sides, which are welded to the column body 1. The structured packing 10 is installed inside the column body 1, and a support assembly 11 is installed below the structured packing 10. A pad 12 is installed below the support assembly 11, and a screw 13 is welded below the pad 12. A fastening nut 14 is installed in the middle of the screw 13, and the fastening nut 14 is threadedly connected to the screw 13. The support assembly 11 includes a support frame 1101 and a level 1102. A level 1102 is installed in the center of the support frame 1101. A clamping rod 7 is installed above the structured packing 10, and a sliding rod 8 is slidably connected inside the clamping rod 7. A spring 9 is installed on the periphery of the sliding rod 8, and the spring 9 is slidably connected to the sliding rod 8. The support frame 1101 is placed stably on the pad 12. The lifting height of the three sets of pads 12 is precisely adjusted by rotating the screw 13. After the bubble of the level 1102 at the top of the support frame 1101 is centered and shows that it is completely horizontal, the fastening nut 14 is immediately rotated to lock the screw 13 to ensure that the support frame 1101 always remains horizontal during operation. Then, the structured packing 10 is rotated 90 degrees clockwise and stacked alternately on the support frame 1101. Both hands push the two clamping rods 7 inward simultaneously and slide them along the slide rod 8, so that the spring 9 is evenly compressed to generate pre-tightening force. When the clamping rods 7 are placed to the edge of the uppermost structured packing 10, they are slowly released. Under the rebound of the spring 9, the clamping rods 7 will naturally open and fit tightly against the inner wall of the tower body 1, forming a stable clamping structure. This design is not only suitable for the quick positioning and installation of structured packing 10 of different specifications.

[0016] like Figure 1 and Figure 2 As shown, a sealing gasket 6 is installed at the front end of the side wall of the tower body 1, and a cover plate 2 is installed around the sealing gasket 6. An observation window 3 is installed inside the cover plate 2, and the observation window 3 is embedded in the cover plate 2. Bolts 5 are installed on the left and right sides of the cover plate 2, and the bolts 5 are embedded in the cover plate 2. The working condition of the structured packing 10 can be monitored in real time through the observation window 3 located on the side wall of the tower body 1. When obvious scaling, discoloration, or uneven liquid film distribution is found on the surface of the packing, and the mass transfer efficiency continues to decline, it indicates that maintenance is required immediately. At this time, loosen the bolts 5 and move the cover plate 2 away from the tower body 1 to completely expose the installation area of ​​the structured packing 10. The operator can wear protective equipment to enter the tower and remove the packing layer by layer using a segmented disassembly method. Depending on the degree of contamination, a treatment plan such as high-pressure water washing, chemical soaking, or direct replacement can be selected. After maintenance, reposition cover plate 2 and align it with the mounting holes. Tighten bolts 5 to secure it, causing the sealing gasket 6 to elastically deform and ultimately form a uniform interference seal surface. This double-seal design effectively prevents gas leakage. Meanwhile, the transparent material and explosion-proof structure of the observation window 3 facilitate routine inspections and comply with industrial safety standards. Working Principle: When using this distillation column for methyltrichlorosilane purification, firstly, place the support frame 1101 stably on the pads 12. Adjust the height of the three sets of pads 12 by rotating the screw 13, while continuously observing the level indicator 1102 on the support frame 1101 until the bubble is completely centered, indicating that the support frame 1101 is level. Then, rotate the locking nut 14 to tighten the screw 13, ensuring its fixed position and preventing loosening due to vibration or external force, thereby maintaining the horizontal stability of the support frame 1101. Next, place the structured packing 10 on the support frame 1101 in a staggered manner at 90-degree angles, ensuring they are neatly arranged. Then, the operator must simultaneously pull the two levers 7 inwards, causing them to slide on the slide bar 8 and move closer together. At this time, the spring 9 will contract due to the force. After moving the clamping rod 7 to the upper surface of the top layer of structured packing 10, slowly release the clamping rod 7. The elastic force of the spring 9 will push the clamping rod 7 outward until it tightly abuts against the inner wall of the tower body 1, thus firmly fixing the structured packing 10 between the support frame 1101 and the clamping rod 7. This design is not only suitable for fixing structured packing 10 of different specifications, but also effectively ensures the accuracy of its horizontal position. After installation, the surface condition of the structured packing 10 can be checked periodically through the observation window 3. When the structured packing 10 accumulates contaminants due to long-term use, thus affecting the mass transfer efficiency, the bolts 5 need to be loosened with a tool to remove the cover plate 2 from the tower body 1, thereby exposing the installation area of ​​the structured packing 10 for easy cleaning or replacement. After maintenance, the cover plate 2 is reinstalled onto the tower body 1 in reverse order. During this process, the design of the screw 13 ensures that the interference fit sealing gasket 6 fully fills the gap between the cover plate 2 and the tower body 1, thereby ensuring the sealing performance of the tower body 1 and preventing gas or liquid leakage.

Claims

1. A distillation column for purifying methyltrichlorosilane, comprising a column body (1) and structured packing (10), characterized in that, Connecting blocks (4) are installed on the left and right sides of the tower body (1), and the connecting blocks (4) are welded to the tower body (1). The structured packing (10) is installed inside the tower body (1), and a support assembly (11) is installed below the structured packing (10). A pad (12) is installed below the support assembly (11), and a screw (13) is welded below the pad (12).

2. The distillation column for purifying methyltrichlorosilane according to claim 1, characterized in that, A fastening nut (14) is installed in the middle of the screw (13), and the fastening nut (14) and the screw (13) are connected by threads.

3. The distillation column for purifying methyltrichlorosilane according to claim 1, characterized in that, The support assembly (11) includes a support frame (1101) and a level (1102), and the level (1102) is installed in the center of the support frame (1101).

4. The distillation column for purifying methyltrichlorosilane according to claim 1, characterized in that, A clamping rod (7) is installed above the structured packing (10), and a sliding rod (8) is slidably connected inside the clamping rod (7).

5. The distillation column for purifying methyltrichlorosilane according to claim 4, characterized in that, A spring (9) is installed on the periphery of the slide rod (8), and the spring (9) and the slide rod (8) are slidably connected.

6. The distillation column for purifying methyltrichlorosilane according to claim 1, characterized in that, A sealing gasket (6) is installed on the front end of the side wall of the tower body (1), and a cover plate (2) is installed around the sealing gasket (6).

7. The distillation column for purifying methyltrichlorosilane according to claim 6, characterized in that, An observation window (3) is installed inside the cover plate (2), and the observation window (3) and the cover plate (2) are inlaid together.

8. The distillation column for purifying methyltrichlorosilane according to claim 6, characterized in that, Bolts (5) are installed on the left and right sides of the cover plate (2), and the bolts (5) are embedded in the cover plate (2).

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