Low-temperature vacuum rectification column

Abstract

The utility model relates to rectifying column technical field proposes a low temperature decompression rectifying column, including lower tower body, fixedly connected in the lower tower body bottom end's drainage pipe, the inner wall equal interval of drainage pipe is provided with the filler, assembles the suspension assembly in the lower tower body inside, through bolt nut fixedly connected in the upper tower body of lower tower body top, the top fixedly connected with exhaust pipe of upper tower body, one side fixedly connected with decompression pipe of upper tower body and lower tower body, the lower end fixedly connected with distributor of upper tower body inner wall, the top fixedly connected with the communicating seat of distributor, the top fixedly connected with the liquid inlet pipe of extending to the outside of upper tower body of communicating seat, assemble the anti -back flow subassembly in the communicating seat inside, through the suspension assembly who sets, make when needing to dismount replacement to filler subsequently, can directly suspend a plurality of fillers outside the lower tower body, take down in turn to fillers sliding, improve the work efficiency of replacement to filler.

Description

Technical Field

[0001] This utility model relates to the field of distillation column technology, specifically to a low-temperature vacuum distillation column. Background Technology

[0002] A cryogenic vacuum distillation column is a distillation device that operates under reduced pressure at low temperatures. It utilizes the principle that substances have different boiling points under different pressures to separate and purify gas or liquid mixtures. Due to its advantages such as high efficiency, high purity, simple maintenance, and environmental friendliness and energy saving, it is widely used in the purification of high-purity food-grade liquid carbon dioxide.

[0003] A search revealed an existing patent (publication number: CN217391616U) that discloses a low-temperature vacuum distillation column. The column body is connected to the condenser via a first conduit (2), the bottom of the condenser is connected to the waste liquid bottle (24) via a second conduit (3), and the condenser is connected to the reflux tank (1) via a third conduit (4). The condenser is equipped with an electromagnet (6), a controller (7), a condenser tube (8), a liquefaction layer (9), a condensation layer (10), an insulation layer (11), a first funnel (12), and a second funnel (13). The second funnel (13) is movably connected to the inner wall of the liquefaction layer (9) and is equipped with a magnet. The distillation flask (16) is equipped with a temperature detector (5), and the controller (7) and the temperature detector (5) are connected. This invention solves the problems of air condensing and dripping water on the condenser and the need for manual control of target product collection.

[0004] However, the above-mentioned scheme makes it inconvenient to disassemble and replace the packing. After long-term use, the surface of the packing may be corroded or have material adhering to it, which will affect its throughput and lead to a decline in performance. However, the existing packing layer is cumbersome and inconvenient to disassemble and replace, which is not conducive to the staff lifting it out and carrying out disassembly and assembly operations.

[0005] In view of this, the present invention proposes a low-temperature vacuum distillation column. Utility Model Content

[0006] This invention proposes a low-temperature vacuum distillation column, which solves the problem of inconvenience in disassembling and replacing packing in related technologies.

[0007] The technical solution of this utility model is as follows: A low-temperature vacuum distillation column includes a lower column body; a drain pipe fixedly connected to the bottom end of the lower column body, the inner wall of the drain pipe being equally spaced with packing material; a suspension assembly assembled inside the lower column body, the suspension assembly being used to suspend and disassemble multiple packing materials; an upper column body fixedly connected to the top end of the lower column body by bolts and nuts, the top end of the upper column body being fixedly connected with an exhaust pipe, a pressure reducing pipe being fixedly connected to one side of the upper and lower column bodies, a distributor being fixedly connected to the lower end of the inner wall of the upper column body, a connecting seat being fixedly connected to the top end of the distributor, and a liquid inlet pipe extending to the outside of the upper column body being fixedly connected to the top end of the connecting seat; and an anti-backflow assembly assembled inside the connecting seat, the anti-backflow assembly preventing the backflow of liquid carbon dioxide.

[0008] The suspension assembly includes: a vertical rod slidably connected at the middle position of the plurality of packings, with slots evenly spaced on one side of the vertical rod; and a retainer movably connected to the top and bottom of the packings, with a retaining rod fixedly connected to the inner wall of the retainer.

[0009] Preferably, the card holder is horseshoe-shaped, and the inner wall of the card holder engages with the surface of the vertical rod.

[0010] Preferably, a lifting ring is welded to the top of the vertical rod, and the upper end of the lifting ring is O-shaped.

[0011] Preferably, the inside of the locking rod and the locking groove form an engaging structure, and the shape of the locking rod and the locking groove is a regular hexagon.

[0012] Preferably, the inner wall of the drain pipe is provided with grooves at equal angles, and the surface of the packing is fixedly connected with sliders that slide and cooperate with the inside of the grooves at equal angles.

[0013] Preferably, the anti-backflow component includes: a fixed groove formed at equal angles on the inner top wall of the connecting seat, with a sliding block movably connected inside the fixed groove; a sliding rod fixedly connected to the bottom end of the sliding block, the bottom end of the sliding rod extending to the outside of the fixed groove and fixedly connected to a sealing disc; and a fixed spring wound around the surface of the sliding rod, with both ends of the fixed spring fixedly connected to the inner bottom wall of the fixed groove and the bottom end of the sliding block, respectively.

[0014] Preferably, the sliding block and the interior of the fixing groove form a sliding structure, and the fixing groove and the sliding block are cross-shaped.

[0015] Preferably, the sealing disc is O-shaped, and the cross-sectional area of ​​the sealing disc is larger than the cross-sectional area of ​​the upper opening inside the connecting seat.

[0016] Preferably, a flow guide platform is fixedly connected to the inner bottom wall of the connecting seat, and the flow guide platform is funnel-shaped.

[0017] The beneficial effects of this utility model are as follows:

[0018] 1. In this utility model, after the upper tower body is opened, the lifting ring can be hooked by an external hook, and then the vertical rod can be lifted upwards. Multiple packing materials can be suspended and taken out together using the clamping seat. Then, the clamping seat can be pushed with more force until it is completely separated from the vertical rod. After that, the packing material can be slid off the surface of the vertical rod. During installation, the packing material is slid onto the surface of the vertical rod in sequence, and then the clamping seat is clamped into the inside of the vertical rod, so that the clamping rod is clamped into the appropriate groove to achieve a firm clamping and fixing of the clamping seat. This facilitates the limiting and clamping of the packing material, and enables the installation of multiple packing materials on the surface of the vertical rod. This allows for the quick installation and removal of multiple packing materials, reduces the difficulty of disassembly and replacement, and improves its practicality.

[0019] 2. In this utility model, when liquid carbon dioxide is transported from the inlet pipe to the inside of the connecting seat, the force of the transport causes the sealing plate to slide down, which in turn drives the sliding rod to slide down. Then, the liquid carbon dioxide continues to be transported down to the inside of the distributor through the gap created by the sliding of the sealing plate. When there is too much liquid carbon dioxide inside the tower body, causing backflow or the inlet pipe to stop transporting, the elastic force of the fixed spring can be used to make the sealing plate slide up to block and seal the upper opening inside the connecting seat, so as to avoid backflow. Attached Figure Description

[0020] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0021] Figure 1 This is a frontal cross-sectional view of the present invention.

[0022] Figure 2 This is a bottom view of the structure of this utility model;

[0023] Figure 3 This is a partial cross-sectional exploded structural diagram of the lower tower body of this utility model;

[0024] Figure 4 This is a partial cross-sectional exploded view of the distributor of this utility model;

[0025] Figure 5 For the present utility model Figure 3 Enlarged structural diagram at point A in the middle;

[0026] Figure 6 For the present utility model Figure 4 Enlarged structural diagram at point B.

[0027] In the diagram: 1. Upper tower body; 2. Inlet pipe; 3. Anti-backflow assembly; 301. Fixing groove; 302. Sliding block; 303. Fixing spring; 304. Sealing plate; 305. Sliding rod; 4. Lower tower body; 5. Suspension assembly; 501. Sliding block; 502. Sliding groove; 503. Card seat; 504. Vertical rod; 505. Card rod; 506. Card groove; 507. Lifting ring; 6. Packing; 7. Drain pipe; 8. Pressure reducing pipe; 9. Distributor; 10. Connecting seat; 11. Exhaust pipe; 12. Flow guide platform. Detailed Implementation

[0028] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this utility model.

[0029] Example 1

[0030] A preferred embodiment of the cryogenic vacuum distillation column provided by this utility model is, for example... Figures 1 to 6 As shown: A low-temperature vacuum distillation column includes a lower column body 4; a drain pipe 7 fixedly connected to the bottom of the lower column body 4, with packing 6 evenly spaced on the inner wall of the drain pipe 7; a suspension assembly 5 assembled inside the lower column body 4, used to suspend and detach multiple packing 6; an upper column body 1 fixedly connected to the top of the lower column body 4 by bolts and nuts, with an exhaust pipe 11 fixedly connected to the top of the upper column body 1, a pressure reducing pipe 8 fixedly connected to one side of the upper column body 1 and the lower column body 4, a distributor 9 fixedly connected to the lower end of the inner wall of the upper column body 1, a connecting seat 10 fixedly connected to the top of the distributor 9, and an inlet pipe 2 extending to the outside of the upper column body 1 fixedly connected to the top of the connecting seat 10; and an anti-backflow assembly 3 assembled inside the connecting seat 10, which prevents the backflow of liquid carbon dioxide.

[0031] The suspension assembly 5 includes: a vertical rod 504 slidably connected at the middle position of multiple fillers 6, with slots 506 evenly spaced on one side of the vertical rod 504; and a retainer 503 movably connected to the top and bottom of the filler 6, with a retaining rod 505 fixedly connected to the inner wall of the retainer 503.

[0032] In this embodiment, the lifting ring 507 is hooked by an external hook, and then the vertical rod 504 is lifted upwards. Multiple packing materials 6 are then lifted and removed together using the retaining seat 503. The retaining seat 503 is then pushed with considerable force, and the packing materials 6 can be slid off the surface of the vertical rod 504. During installation, the packing materials 6 are slid onto the surface of the vertical rod 504 in sequence. The retaining seat 503 is then used to limit and engage the packing materials 6 sliding on the surface of the vertical rod 504, thereby achieving the installation of multiple packing materials 6 on the surface of the vertical rod 504. Finally, the packing materials 6 are placed into the drain pipe 7 using an external hook or other suspension device.

[0033] In a further preferred embodiment of the present invention, the card holder 503 is horseshoe-shaped, and the inner wall of the card holder 503 engages with the surface of the vertical rod 504.

[0034] In this embodiment, a horseshoe-shaped card holder 503 is used so that the card holder 503 can be locked onto the surface of the vertical rod 504.

[0035] In a further preferred embodiment of this utility model, a lifting ring 507 is welded to the top of the vertical rod 504, and the upper end of the lifting ring 507 is O-shaped.

[0036] In this embodiment, the lifting ring 507 is used to facilitate lifting or lowering the vertical rod 504, thereby enabling the suspension and disassembly of multiple packing materials 6.

[0037] In a further preferred embodiment of the present invention, the internal structure of the locking rod 505 and the locking groove 506 forms an engaging structure, and the shapes of the locking rod 505 and the locking groove 506 are regular hexagons.

[0038] In this embodiment, the engagement between the regular hexagonal locking rod 505 and the inside of the locking groove 506 is used to improve the firmness and stability of the engagement installation between the locking seat 503 and the surface of the vertical rod 504.

[0039] In a further preferred embodiment of the present invention, the inner wall of the drain pipe 7 is provided with a sliding groove 502 at equal angles, and the surface of the packing 6 is fixedly connected with a slider 501 that slides and engages with the inside of the sliding groove 502 at equal angles.

[0040] In this embodiment, the sliding between the slider 501 and the inside of the groove 502 is used to improve the smoothness and stability of the up-and-down sliding of the multiple packings 6.

[0041] Example 2

[0042] Based on Example 1, a preferred embodiment of the cryogenic vacuum distillation column provided by this utility model is as follows: Figures 1 to 6As shown: the anti-backflow component 3 includes: a fixing groove 301 formed at equal angles on the inner top wall of the connecting seat 10, and a sliding block 302 movably connected inside the fixing groove 301; a sliding rod 305 fixedly connected to the bottom end of the sliding block 302, the bottom end of the sliding rod 305 extending to the outside of the fixing groove 301 and fixedly connected to a sealing disc 304; and a fixing spring 303 wound around the surface of the sliding rod 305, the two ends of the fixing spring 303 being fixedly connected to the inner bottom wall of the fixing groove 301 and the bottom end of the sliding block 302, respectively.

[0043] In this embodiment, when liquid carbon dioxide is transported from the inlet pipe 2 to the inside of the connecting seat 10, the force of the transport causes the sealing plate 304 to slide down. Then, the liquid carbon dioxide continues to be transported down to the inside of the distributor 9 through the gap created by the sliding of the sealing plate 304. When there is too much liquid carbon dioxide inside the lower tower body 4, causing backflow or when the inlet pipe 2 stops transporting, the elastic force of the fixed spring 303 can be used to make the sealing plate 304 slide up to block and seal the upper opening inside the connecting seat 10, so as to avoid backflow.

[0044] In a further preferred embodiment of the present invention, a sliding structure is formed between the sliding block 302 and the interior of the fixing groove 301, and the shapes of the fixing groove 301 and the sliding block 302 are cross-shaped.

[0045] In this embodiment, the smoothness of the slide bar 305 sliding up and down is improved by utilizing the sliding of the cross-shaped sliding block 302 and the inside of the fixing groove 301.

[0046] In a further preferred embodiment of this utility model, the sealing disc 304 is O-shaped, and the cross-sectional area of ​​the sealing disc 304 is larger than the cross-sectional area of ​​the upper opening inside the connecting seat 10.

[0047] In this embodiment, a large-area sealing disc 304 is used to facilitate the blocking and sealing of the upper opening inside the connecting seat 10.

[0048] In a further preferred embodiment of the present invention, a flow guide platform 12 is fixedly connected to the inner bottom wall of the connecting seat 10, and the flow guide platform 12 is funnel-shaped.

[0049] In this embodiment, the funnel-shaped guide platform 12 is used to allow liquid carbon dioxide to be discharged more thoroughly into the distributor 9.

[0050] The working principle of this utility model is as follows: First, the low-temperature vacuum distillation tower of this application is a step in the carbon dioxide industrial waste gas recovery system emitted by the low-temperature methanol washing and decarbonization device. At the same time, the liquid inlet pipe 2 is connected to the liquefier, the liquid outlet pipe 7 is connected to the subcooler, the exhaust pipe 11 is connected to the liquefier, and the pressure reducing pipe 8 is connected to the external pressure reducing equipment.

[0051] After the pressure inside the upper tower 1 and lower tower 4 is reduced to a suitable level through the pressure reducing pipe 8, the purified gas after adsorption and de-alcoholization enters the liquefaction unit. Through refrigerant evaporation and heat absorption, the temperature drops to -30℃ to -20℃, causing the carbon dioxide gas to liquefy. It is then transported to the liquid inlet pipe 2 and then to the connecting seat 10. At this time, the force of the transport causes the sealing plate 304 to slide down, which drives the slide rod 305 to slide down. This causes the sliding block 302 to slide down in the fixed groove 301 and compress the fixed spring 303. After that, the liquid carbon dioxide continues to be transported down to the distributor 9 through the gap created by the sliding of the sealing plate 304.

[0052] Then, liquid carbon dioxide is evenly distributed using distributor 9, and then impurities are separated by packing 6 under specific conditions using the principle of low-temperature vacuum distillation to improve the purity of carbon dioxide and obtain qualified food-grade liquid carbon dioxide product. After that, it is discharged into an external cooler through drain pipe 7 for further cooling and storage in a low-temperature carbon dioxide storage tank. At the same time, the exhaust gas generated during the distillation process is discharged through exhaust pipe 11 and then liquefied by the external condenser before entering the reflux tank. The liquid in the reflux tank is then sent to the pre-distillation tower for washing and impurity removal by the reflux pump.

[0053] Meanwhile, when there is too much liquid carbon dioxide inside the lower tower body 4, causing backflow or the inlet pipe 2 to stop conveying, the elastic force of the fixed spring 303 can be used to make the sealing plate 304 slide upward to block the upper opening inside the connecting seat 10, thus preventing backflow. Furthermore, the bolts and nuts on the upper tower body 1 and lower tower body 4 can be removed, the upper tower body 1 opened, and the lifting ring 507 hooked by an external hook. The vertical rod 504 is then lifted upward, and multiple packing materials 6 are suspended and removed together using the clamping seat 503. The clamping seat 503 is then pushed with considerable force to ensure that the clamping rod 505 is fully engaged with the clamping groove 5. After the packing 6 is detached from the inside, it can be slid off the surface of the vertical rod 504. During installation, the packing 6 is slid onto the surface of the vertical rod 504 in sequence, and then the clamping seat 503 is clamped into the inside of the vertical rod 504, so that the clamping rod 505 is clamped into the appropriate clamping groove 506, so as to achieve a firm clamping and fixing of the clamping seat 503, which facilitates the limiting clamping of the packing 6, and realizes the sleeve installation of multiple packing 6 on the surface of the vertical rod 504. Then, the packing 6 is placed into the drain pipe 7 through external suspension equipment such as hooks, and the slider 501 slides in the sliding groove 502 to improve the stability of the sliding installation of the packing 6.

[0054] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A low-temperature vacuum distillation column, characterized in that, include: Lower tower body (4); A drain pipe (7) is fixedly connected to the bottom end of the lower tower body (4), and the inner wall of the drain pipe (7) is provided with packing (6) at equal intervals. The suspension assembly (5) is installed inside the lower tower body (4) and is used to suspend and disassemble the multiple packing materials (6). The upper tower body (1) is fixedly connected to the top of the lower tower body (4) by bolts and nuts. The top of the upper tower body (1) is fixedly connected to an exhaust pipe (11). A pressure reducing pipe (8) is fixedly connected to one side of the upper tower body (1) and the lower tower body (4). A distributor (9) is fixedly connected to the lower end of the inner wall of the upper tower body (1). A connecting seat (10) is fixedly connected to the top of the distributor (9). An inlet pipe (2) extending to the outside of the upper tower body (1) is fixedly connected to the top of the connecting seat (10). An anti-backflow assembly (3) is installed inside the connecting seat (10), which prevents the backflow of liquid carbon dioxide; The suspension assembly (5) includes: A vertical rod (504) is slidably connected at the middle position of multiple packing materials (6), and a slot (506) is provided at equal intervals on one side of the vertical rod (504). A retainer (503) is movably connected to the top and bottom of the packing (6), and a retainer rod (505) is fixedly connected to the inner wall of the retainer (503).

2. The low-temperature vacuum distillation column according to claim 1, characterized in that, The card holder (503) is horseshoe-shaped, and the inner wall of the card holder (503) engages with the surface of the vertical rod (504).

3. The low-temperature vacuum distillation column according to claim 1, characterized in that, The top of the vertical rod (504) is welded with a lifting ring (507), and the upper end of the lifting ring (507) is O-shaped.

4. A low-temperature vacuum distillation column according to claim 1, characterized in that, The locking rod (505) and the slot (506) form an engaging structure, and the locking rod (505) and the slot (506) are both hexagonal in shape.

5. A low-temperature vacuum distillation column according to claim 1, characterized in that, The inner wall of the drain pipe (7) is provided with a sliding groove (502) at equal angles, and the surface of the packing (6) is fixedly connected with a slider (501) that slides and cooperates with the inside of the sliding groove (502) at equal angles.

6. A low-temperature vacuum distillation column according to claim 1, characterized in that, The anti-backflow component (3) includes: A fixing groove (301) is formed at equal angles on the top wall of the connecting seat (10), and a sliding block (302) is movably connected inside the fixing groove (301). A slide rod (305) is fixedly connected to the bottom end of the slide block (302). The bottom end of the slide rod (305) extends to the outside of the fixing groove (301) and is fixedly connected to a sealing disc (304). A fixed spring (303) is wound around the surface of the slide bar (305), and the two ends of the fixed spring (303) are fixedly connected to the bottom wall of the fixed groove (301) and the bottom end of the sliding block (302), respectively.

7. A low-temperature vacuum distillation column according to claim 6, characterized in that, The sliding block (302) and the interior of the fixed groove (301) form a sliding structure, and the fixed groove (301) and the sliding block (302) are cross-shaped.

8. A low-temperature vacuum distillation column according to claim 6, characterized in that, The sealing disc (304) is O-shaped, and the cross-sectional area of ​​the sealing disc (304) is greater than the cross-sectional area of ​​the upper opening inside the connecting seat (10).

9. A low-temperature vacuum distillation column according to claim 1, characterized in that, The inner bottom wall of the connecting seat (10) is fixedly connected to a flow guide (12), which is funnel-shaped.

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