A packed rectification column

Abstract

This invention provides a packed distillation column, comprising: a column body; a guide tray fixed in the middle of the column body, with a connecting pipe in the middle of the guide tray and several evenly distributed gas slots; a redistribution tank installed in the middle of the column body and connected to the lower side of the connecting pipe, with the lower part of the several gas slots connected to the redistribution tank, and several evenly distributed distribution holes at the bottom of the redistribution tank; several U-shaped connecting parts evenly fixed to the side of the redistribution tank; and several overflow parts evenly fixed to the bottom of the redistribution tank, each overflow part having a redistribution cavity on its inner side, and a flow divider at the bottom of the overflow part. This invention solves the technical problem that conventional redistributors, which typically use a method of distributing liquid by overflowing the outlet holes, cause scum floating on the liquid surface and tiny air bubbles carried by the liquid to be transported downwards through the outlet holes along with the liquid flow.

Description

Technical Field

[0001] This invention relates to the field of distillation column technology, and more specifically to a packed distillation column. Background Technology

[0002] Packed distillation columns, as core equipment in the field of chemical separation, mainly rely on the packing material inside the column to achieve full contact and mass transfer between the gas and liquid phases. The liquid phase material flows from top to bottom in the column, while the gas phase material flows countercurrently from bottom to top. Through multiple heat and mass transfers, the mixture is separated and purified. To ensure the uniformity of liquid phase flow inside the column and avoid liquid phase deviation and wall flow affecting the separation effect, a liquid phase redistributor and corresponding liquid collection components are usually installed inside the column to collect and redistribute the liquid phase falling from the packing material, thereby ensuring the effective utilization of the overall mass transfer area of ​​the packing material. In the existing technology, the liquid collection component on the upper side of the redistributor only has a simple liquid collection function, and the overall structure and function are simple. At the same time, conventional redistributors generally use the method of liquid overflowing through the liquid outlet to distribute the liquid evenly. During the operation of the equipment, the scum floating on the surface of the liquid phase and the tiny bubbles carried by the liquid phase are transported downward through the liquid outlet along with the liquid flow and directly enter the interior of the lower packing. This continuously affects the normal mass transfer process of the gas and liquid phases in the column. Long-term operation can easily cause the lower packing to accumulate dirt and the flow channel to become disordered, reducing the overall separation stability and operating accuracy of the distillation column. Summary of the Invention

[0003] To address the shortcomings of existing technologies, this invention proposes a packed distillation column to solve the technical problems of existing technologies where the liquid collection component only has a simple liquid collection function, and conventional redistributors generally use the method of liquid overflowing through the liquid outlet to evenly distribute the liquid, which causes the scum floating on the surface of the liquid phase and the tiny air bubbles carried by the liquid phase to be transported downward through the liquid outlet along with the liquid flow.

[0004] The technical solution adopted in this invention is a packed distillation column, comprising: tower body; A diversion tray is fixed in the middle of the tower body. A connecting pipe is provided in the middle of the diversion tray. The diversion tray has several evenly distributed gas slots. A redistribution tank is installed in the middle of the tower body and is connected to the lower side of the connecting pipe. Several gas slots are connected to the redistribution tank below. Several evenly distributed distribution holes are opened at the bottom of the redistribution tank. Several U-shaped connecting parts are evenly fixed on the side of the redistribution barrel. All U-shaped connecting parts are inverted and their inner connection ports are connected to the bottom of the redistribution barrel. The overflow components are of several kinds, and the overflow components are evenly fixed at the bottom of the redistribution tank. The inner side of each overflow component is provided with a redistribution cavity. The outer connecting port of each U-shaped connecting component is connected to the redistribution cavity respectively. The bottom of the overflow component is provided with several evenly distributed diverting components.

[0005] In a preferred embodiment, the flow trays are arranged from top to bottom towards the center, and there is a flow gap between the outermost edge of the flow trays and the tower body. A shielding ring is fixed inside the tower body, and the shielding ring is located above the flow gap.

[0006] In a preferred embodiment, the diversion tray includes a plurality of diversion ring plates arranged in sequence and a blocking ring fixed thereon, a plurality of gas grooves are respectively arranged between adjacent diversion ring plates, and the plurality of diversion ring plates are all inclined inward.

[0007] In a preferred embodiment, the plurality of air grooves are all triangular in shape, with one side of the air groove being close to the adjacent blocking ring, and the outward-pointing sharp corner of the air groove being away from the adjacent blocking ring.

[0008] In a preferred embodiment, the air grooves of adjacent drainage ring plates are staggered.

[0009] In a preferred embodiment, a dividing member is fixed in the middle of the tower body. The dividing member is located between the plurality of the flow guiding ring plates and the redistribution barrel. The upper end face of the dividing member is inclined, and the lower end face of the dividing member is arc-shaped.

[0010] In a preferred embodiment, the sides of several of the diverting members are fixedly connected to the inner wall of the overflow member, and the diverting members and the interior of the overflow member form a diversion channel, through which liquid overflowing the height of the diverting members in the diversion channel flows out through the inner side of the diverting members.

[0011] In a preferred embodiment, the diverter is a strip with a V-shaped cross-section, and a V-shaped groove is provided on the upper side of the diverter. Both the diverter and the distribution hole tube have a pointed design at the bottom.

[0012] In a preferred embodiment, a collection bucket is fixedly disposed in the middle of the inner side of the redistribution bucket, a filter screen is fixedly disposed inside the collection bucket, and a plurality of through pipes are fixedly disposed in the inner side of the redistribution bucket. One end of each of the plurality of through pipes is connected to the inner connection port of a plurality of U-shaped connecting parts, and the other end of each of the plurality of through pipes is connected to the bottom of the collection bucket. The highest point of the top of the plurality of U-shaped connecting parts is located below the filter screen.

[0013] In a preferred embodiment, the tower body is provided with a liquid inlet and an air inlet on its upper and lower sides, respectively, and an air outlet and a liquid outlet are provided at the upper and lower ends of the tower body, respectively. A distributor is fixedly installed on the upper side inside the tower body, and the distributor is connected to the liquid inlet. Two corrugated packings are fixedly installed inside the tower body, and the two corrugated packings are respectively located above the diversion tray and below the redistribution tank.

[0014] As can be seen from the above technical solution, the beneficial technical effects of the present invention are as follows: This device collects and guides the liquid phase falling from the upper corrugated packing through a guide tray, allowing some of the liquid phase to flow along the inclined lower end face of the guide tray, thus enabling gas-liquid contact and mass transfer. The liquid phase then flows into the redistribution tank below. The gas phase flowing upwards through the tower can pass through the guide tray via gas slots, completing gas-liquid separation. The redistribution tank temporarily stores the collected liquid phase. When the liquid level in the redistribution tank exceeds the height of the top of the U-shaped connector, the liquid phase will flow through the inverted U-shaped connector... The shaped connecting piece is introduced into the redistribution chamber of the corresponding overflow piece, so that the scum floating on the liquid surface in the redistribution tank can remain above the liquid surface in the redistribution tank and will not flow into the lower packing with the liquid outflow; the liquid phase in the redistribution chamber is further divided by the diverter at the bottom of the overflow piece and flows evenly downward to the lower corrugated packing. While completing the liquid phase redistribution, it blocks the downward transport of scum, reduces the accumulation of scum in the lower packing, ensures normal mass transfer between the gas and liquid phases, and improves the separation stability of the distillation column. Attached Figure Description

[0015] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the accompanying 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.

[0016] Figure 1 This is a schematic diagram of the structure of a packed distillation column according to the present invention; Figure 2 This is a partial structural diagram of the present invention. Figure 1 ; Figure 3 for Figure 2 Enlarged view of point A in the middle; Figure 4 This is a partial structural diagram of the present invention. Figure 2 ; Figure 5 for Figure 4 Enlarged view of point B in the middle; Figure label: Tower body 1, liquid inlet 11, air inlet 12, air outlet 13, liquid outlet 14, distributor 15, corrugated packing 16; 2. Drainage tray; 21. Connecting pipe; 22. Gas groove; 23. Flow gap; 231. Shielding ring; Drainage ring plate 24, blocking ring 241, dividing piece 25; 3. Redistribution tank body, 31. Distribution hole pipe, 32. U-shaped connecting part, 33. Overflow part, 33. Redistribution cavity, 331. Diverting part, 332. Diverting groove, 3321. V-shaped groove, 3322. Collection tank, 34. Filter screen, 341. Through pipe, 342. Baffle, 35. Detailed Implementation

[0017] The embodiments of the technical solution of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the technical solution of the present invention and are therefore intended to limit the scope of protection of the present invention.

[0018] It should be noted that, unless otherwise stated, the technical or scientific terms used in this application should have the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains.

[0019] Example: like Figure 1 As shown, this embodiment provides a packed distillation column, including a column body 1, a guide tray 2, a redistribution tank 3, a U-shaped connector 32, and an overflow component 33. The guide tray 2 is fixed in the middle of the column body 1, and the guide tray 2 itself is shaped like an inverted frustum. A connecting pipe 21 is provided in the middle of the guide tray 2, and the guide tray 2 has several evenly distributed gas grooves 22. The redistribution tank 3 is installed in the middle of the column body 1 and is connected to the lower side of the connecting pipe 21. The lower part of the several gas grooves 22 is connected to the redistribution tank 3, and the bottom of the redistribution tank 3 has several evenly distributed gas grooves. The tube 31 has several U-shaped connecting parts 32, which are evenly fixed on the side of the redistribution tank 3. The U-shaped connecting parts 32 are all inverted and their inner connection ports are connected to the bottom of the redistribution tank 3. The overflow parts 33 have several overflow parts 33, which are evenly fixed on the bottom of the redistribution tank 3. The overflow parts 33 have redistribution cavities 331 on their inner sides. The outer connection ports of the U-shaped connecting parts 32 are connected to the redistribution cavities 331 respectively. The bottom of the overflow parts 33 has several evenly distributed diverting parts 332. The tower body 1 is provided with a liquid inlet 11 and an air inlet 12 on the upper and lower sides respectively. The tower body 1 is provided with an air outlet 13 and a liquid outlet 14 at the upper and lower ends respectively. A distributor 15 is fixedly installed on the upper side inside the tower body 1. The distributor 15 is connected to the liquid inlet 11. Two corrugated packings 16 are fixedly installed inside the tower body 1. The two corrugated packings 16 are located above the flow tray 2 and below the redistribution tank 3 respectively. Several distribution perforated pipes 31 are used for the passage of a small amount of liquid phase, making it suitable for the working requirements of small liquid volume.

[0020] The liquid inlet 11 is used to transport the liquid phase material to be separated into the tower body 1, the gas inlet 12 is used to transport the gas phase material to be separated into the tower body 1, the gas outlet 13 is used to discharge the gas phase product after mass transfer separation, and the liquid outlet 14 is used to discharge the liquid phase product after mass transfer separation. The distributor 15 is connected to the liquid inlet 11 and can evenly spray the liquid phase material entering the upper part of the tower body 1 onto the surface of the corrugated packing 16 above, ensuring that the initial distribution of the liquid phase is uniform. The corrugated packing 16 is arranged above the guide tray 2 and below the redistribution tank 3, which can increase the contact area between the gas and liquid phases and enhance the basic mass transfer exchange. The diversion tray 2 is fixed in the middle of the tower body 1 and is shaped like an inverted truncated cone. It can collect the liquid phase material falling through the corrugated packing 16 above. The connecting pipe 21 and several gas grooves 22 in the middle of the diversion tray 2 connect the diversion tray 2 to the redistribution tank 3, allowing the collected liquid phase to fall into the interior of the redistribution tank 3. The several uniformly distributed gas grooves 22 opened in the diversion tray 2 allow the gas phase to pass through from bottom to top, while allowing some liquid phase to pass directly through the gas grooves 22. Another part of the liquid phase flows along the lower end face of the diversion tray 2. During the rise of the gas phase, it gently contacts the lower end face of the diversion tray 2 to form a mild fluid impact, without damaging the original surface morphology of the liquid, so as to fully achieve gas-liquid contact. This gives the diversion tray 2 the dual functions of liquid collection and packing mass transfer, making up for the deficiency of conventional redistributors that only collect liquid without mass transfer enhancement. The redistribution tank 3 receives the liquid phase collected by the diversion tray 2 through the connecting pipe 21, realizing the temporary storage and buffering of the liquid phase. Several evenly distributed distribution holes 31 at the bottom of the body 3 can directly guide a portion of the liquid phase downwards into the corrugated packing 16 below; several inverted and evenly arranged U-shaped connectors 32 have their inner connection ports connected to the bottom of the inner side of the redistribution tank 3. When the liquid level is higher than the top of the U-shaped connectors 32, the liquid phase in the tank can be smoothly transported to the overflow component 33. The redistribution cavity 331 inside the overflow component 33 receives the liquid phase transported by the U-shaped connectors 32, completing a secondary buffer and uniform flow. Several evenly distributed diverter components 332 at the bottom of the overflow component 33 subdivide and export the liquid phase inside the redistribution cavity 331, further improving the uniformity of the liquid phase falling. The entire device relies on the lower end face of the guide tray 2 to form an additional gas-liquid mass transfer area, which can collect the liquid phase falling in the tower, avoid liquid phase deviation and wall flow, and continuously maintain sufficient gas-liquid contact with the warm fluid contact at the lower end face of the guide tray 2, enhance the distillation mass transfer efficiency, and reduce the situation of gas phase entrainment of liquid phase or liquid phase short-circuiting.

[0021] The flow tray 2 is arranged from top to bottom towards the middle. There is a flow gap 23 between the outermost part of the flow tray 2 and the tower body 1. A shielding ring 231 is fixed inside the tower body 1 and is located above the flow gap 23.

[0022] The diversion tray 2 guides the falling liquid phase in the tower to continuously converge towards the center of the diversion tray 2, ensuring that the liquid phase flows into the redistribution tank 3. The flow gap 23 between the outermost part of the diversion tray 2 and the tower body 1 allows the rising gas phase to flow to the side. The shielding ring 231 fixed inside the tower body 1 is arranged above the flow gap 23 to prevent the liquid phase from accumulating on the inner wall of the tower body 1 and forming wall flow, reducing the direct downward flow of liquid that has not converged and flowed through the diversion tray 2. The shielding ring 231 can intercept the falling liquid phase and guide it to the surface of the diversion tray 2, increasing the total amount of liquid phase collected in the diversion tray 2. The flow gap 23, together with the shielding ring 231, can maintain the channel for the gas phase to flow vertically, without blocking the overall gas phase flow in the tower.

[0023] In one implementation, such as Figure 2-3 As shown, the diversion tray 2 includes several diversion ring plates 24 arranged in sequence and a blocking ring 241 fixed thereon. Several air grooves 22 are respectively arranged between adjacent diversion ring plates 24. The diversion ring plates 24 are all inclined inward. The lower ends of the diversion ring plates 24 together form a smooth inclined end face.

[0024] The flow guiding ring plates 24 are arranged in an inward tilt to form a flow guiding slope. The blocking rings 241 can intercept the falling liquid. The blocking effect of the blocking rings 241 forces the liquid to flow along the lower end face of the inclined flow guiding ring plates 24. The air grooves 22 are set between adjacent flow guiding ring plates 24 to reserve passage space for the rising gas phase. When the rising gas phase passes through the air grooves 22, it can continuously have gentle contact with the liquid phase spreading and flowing along the lower end face of the flow guiding ring plates 24, and the liquid falling from above is blocked by the flow guiding ring plates 24. The liquid flow surface of the liquid on the lower end face of the guide ring plate 24 is not disrupted, thus extending the gas-liquid mass transfer contact time and contact area. This ensures that most of the liquid phase gathers along the lower end face of the guide ring plate 24 towards the center of the guide tray 2. The gas groove 22 does not block the gas phase flow channel, ensuring that the gas phase in the column can flow upward. The multi-layer guide ring plate 24, combined with the blocking ring 241, intercepts the guiding liquid phase in layers, improving the regularity of liquid phase collection, reducing the situation of liquid phase short-circuiting downward, optimizing the gas-liquid two-phase distribution state in the column, and enhancing the distillation mass transfer efficiency.

[0025] Based on the above embodiments, the shape of the plurality of air grooves 22 is triangular, and one side of the air groove 22 is set close to the adjacent blocking ring 241, while the outward sharp corner of the air groove 22 is set away from the adjacent blocking ring 241.

[0026] The gas channel 22 has a triangular overall shape, which guides and diverts the liquid flowing on the guide tray 2, guiding the liquid to slide smoothly to both sides of the gas channel 22. The addition of V-shaped baffles near the sharp corners on the two sides of the triangular gas channel 22 can further enhance the liquid diversion and guidance effect. The V-shaped baffles can prevent the liquid from directly entering the gas channel 22, effectively reducing the total amount of liquid flowing into the gas channel 22. More liquid is constrained at the lower end face of the guide ring plate 24 and continuously converges towards the center of the tray. The triangular outline combined with the V-shaped baffles can regulate the liquid flow trajectory, preventing the liquid from rushing into the gas channel 22 and causing the liquid phase to short-circuit downward. The upward gas phase can pass smoothly through the triangular gas channel 22 with a stable flow space, prolonging the contact time between the liquid phase and the rising gas phase at the lower end face of the guide ring plate 24, increasing the gas-liquid mass transfer contact area, and simultaneously ensuring smooth gas phase flow without obstruction, optimizing the gas-liquid two-phase flow state in the column, and enhancing the distillation separation mass transfer effect.

[0027] Based on the above implementation method, the air grooves 22 of adjacent drainage ring plates 24 are staggered.

[0028] The gas grooves 22 arranged on the adjacent guide ring plates 24 are staggered. The gas grooves 22 of the upper guide ring plate 24 and the gas grooves 22 of the lower guide ring plate 24 are staggered. After the rising gas phase passes through the lower gas groove 22, it cannot tilt upward and directly pass through the upper gas groove 22. The gas phase flow path is forced to bend, prolonging the time that the gas phase stays in the guide tray 2 area. In addition, the blocking ring 241, together with the staggered gas grooves 22, promotes the liquid to be evenly distributed along the lower end face of the guide ring plate 24 and slowly converges towards the center of the guide tray 2. The multi-layer staggered gas grooves 22 can evenly disperse the gas and liquid phase flow in different areas of the column, regulate the gas and liquid phase distribution in the column, give full play to the liquid collection and mass transfer function of the guide tray 2, and improve the gas-liquid mass exchange efficiency of the entire packed distillation column.

[0029] Based on the above implementation method, a dividing member 25 is fixedly provided in the middle of the tower body 1. The dividing member 25 is located between a number of diversion ring plates 24 and the redistribution barrel 3. The upper end face of the dividing member 25 is inclined and the lower end face of the dividing member 25 is arc-shaped.

[0030] A dividing element 25 fixed to the inner wall of the middle section of the tower body 1 is placed between several flow guiding ring plates 24 and the redistribution tank 3. The upper end face of the dividing element 25, which is inclined, can receive the liquid flowing down from the flow guiding ring plates 24 and guide it to the middle section. The lower end face of the dividing element 25, which is arc-shaped, can change the liquid's adhesion and flow trajectory. The liquid is only guided and transported along the upper end face of the dividing element 25 and will not stick to the lower end face of the dividing element 25 and slide down the side wall of the tower body 1, effectively reducing the phenomenon of internal wall flow. The dividing element 25 guides the gas phase flow direction in the area of ​​the flow guiding ring plates 24 and the side of the redistribution tank 3, preventing a small amount of leaked liquid from directly sticking to the wall of the tower body 1 and flowing down. It guides all the collected liquid to flow into the interior of the redistribution tank 3. The arc-shaped lower end face can smoothly divert the gas phase flowing from bottom to top, and the inclined upper end face ensures smooth liquid flow without liquid accumulation.

[0031] In one implementation, such as Figure 2-3 As shown, the sides of several diverting components 332 are fixed to the inner wall of the overflow component 33, and the diverting components 332 and the interior of the overflow component 33 form a diversion channel 3321. Liquid overflowing the height of the diverting components 332 in the diversion channel 3321 flows out through the inner side of the diverting components 332.

[0032] The diverter 332 and the overflow 33 enclose each other to form a diverter trough 3321. The liquid phase entering the redistribution chamber 331 inside the overflow 33 continuously flows into the diverter 3321. When the liquid phase level is higher than the height of the diverter 332 itself, it overflows from the inside of the diverter 332 outward. The diverter 3321 can pre-buffer the liquid phase to play a role in stabilizing pressure and uniform flow, ensuring that the liquid level in each diverter 3321 is consistent and avoiding excessive local liquid phase flow and flow deviation. The diverter 332 relies on the fixed installation structure of the side wall to stably separate multiple independent diverter troughs 3321, so that the liquid phase is released downward synchronously and uniformly from multiple points, eliminating the problem of uneven distribution caused by the instantaneous flow velocity fluctuation of the liquid phase. The liquid phase overflowing from the inside of the diverter 332 falls in a regular shape and can be evenly spread on the surface of the corrugated packing 16 below, reducing the situation of concentrated liquid phase scouring of local areas of the packing.

[0033] Based on the above embodiments, the diverter 332 is a strip-shaped component with a V-shaped cross-section, and a V-shaped slot 3322 is provided on the upper side of the diverter 332. Both the diverter 332 and the distribution hole pipe 31 have pointed ends at their bottoms.

[0034] As the liquid level in the diversion channel 3321 gradually rises, the flow width of the V-shaped slot 3322 increases accordingly, which can simultaneously increase the liquid output. The V-shaped cross-section diversion component 332 has a stable structure, which can reliably separate the diversion channel 3321 and smoothly receive the overflow liquid. The V-shaped slot 332 adapts to the liquid output requirements at different liquid levels by its own gradually changing opening structure. At low liquid levels, only a small area at the bottom of the slot outputs liquid to achieve uniform liquid distribution with a small flow rate. After the liquid level rises, the overall flow area of ​​the slot expands to match a larger liquid load. The strip diversion component 332 is evenly arranged along the overflow component 33 to distribute liquid simultaneously at multiple points. The V-shaped slot 332 is suitable for a wide range of liquid flow conditions, maintains the uniformity of liquid output at each point, eliminates the problem of local overflow congestion under large liquid volume, improves the spreading effect of the liquid on the surface of the corrugated packing 16, and optimizes the gas-liquid mass transfer contact conditions in the tower.

[0035] Both the U-shaped connector 32 and the redistribution tank 3 adopt a bottom-supply configuration. The liquid phase is only fed into the U-shaped connector 32 from the bottom inside the redistribution tank 3. The liquid enters the redistribution chamber 331 along the side wall of the U-shaped connector 32. This eliminates the conventional structure of guiding liquid from the top of the tank, thus isolating air bubbles and suspended impurities on the surface of the liquid in the redistribution tank 3. Only the lower clean liquid phase in the tank is extracted and transported outward to the redistribution chamber 331 inside the overflow component 33. Air bubbles and suspended matter carried by the upper liquid remain in the redistribution chamber. The liquid surface area of ​​barrel 3 cannot follow the downward conduction of the liquid phase. The U-shaped connector 32, installed upside down, combined with the liquid intake structure on the lower side, can form a liquid seal to block the backflow of the gas phase, preventing bubbles from mixing into the liquid phase distribution system below. It also prevents suspended matter from adhering to the inside of the diverter 332 and the distribution hole pipe 31 with the liquid flow, thus preventing flow channel blockage. This maintains a continuous and stable liquid flow rate at the diverter 3321 and the V-shaped groove 3322, ensuring a continuous and intact liquid film on the surface of the corrugated packing 16 below, stabilizing the gas-liquid mass transfer conditions in the tower, and extending the stable operating time of the entire liquid phase redistribution assembly.

[0036] Based on the above implementation methods, such as Figure 4-5 As shown, a collection tank 34 is fixedly installed in the middle of the inner side of the redistribution tank 3. A filter screen 341 is fixedly installed inside the collection tank 34. Several connecting pipes 342 are fixedly installed inside the redistribution tank 3. One end of each connecting pipe 342 is connected to the inner connection port of several U-shaped connecting parts 32, and the other end of each connecting pipe 342 is connected to the bottom of the collection tank 34. The highest point of the top of the several U-shaped connecting parts 32 is located below the filter screen 341. A baffle 35 is fixedly installed on the lower side of the connecting pipe 21 to prevent the falling liquid from directly entering the interior of the collection tank 34.

[0037] During the liquid level rise inside the redistribution tank 3, impurities and air bubbles floating on the surface will flow towards the collection tank 34 with the liquid flow, and then pass through the filter screen 341 inside the collection tank 34 for interception and purification. The outflow rate of the entire structure is greater than the inflow rate, and the liquid surface inside the redistribution tank 3 will continuously gather towards the location of the collection tank 34, ensuring that the liquid carrying air bubbles and suspended matter on the surface continuously contacts the filter screen 341 to achieve uninterrupted filtration. The pipe 342 draws the purified liquid phase from the bottom of the collection tank 34 and transports it to the U-shaped... The connecting member 32, with its highest point positioned below the filter screen 341, ensures that the liquid level in the collection tank 34 is lower than the bottom of the filter screen 341. The collection tank 34 concentrates the liquid phase on its surface, while the filter screen 341 prevents impurities and bubbles from entering the downstream diversion structure such as the through pipe 342. This avoids impurities clogging various flow channels and bubbles disrupting the uniform distribution of the liquid phase, ensuring a continuous supply of clean, bubble-free liquid phase to the diversion tank 3321 and the V-shaped slot 3322. This guarantees a uniform and continuous liquid film on the surface of the corrugated packing 16 below, stabilizing the gas-liquid mass exchange state within the tower.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention.

Claims

1. A packed distillation column, characterized in that, include: Tower body (1); A diversion tray (2) is fixed in the middle of the tower body (1). A connecting pipe (21) is provided in the middle of the diversion tray (2). The diversion tray (2) has several evenly distributed gas slots (22). The redistribution barrel (3) is installed in the middle of the tower body (1) and is connected to the lower side of the connecting pipe (21). Several gas slots (22) are connected to the redistribution barrel (3) below. Several evenly distributed distribution holes (31) are opened at the bottom of the redistribution barrel (3). Several U-shaped connecting parts (32) are evenly fixed on the side of the redistribution barrel (3). Several U-shaped connecting parts (32) are inverted and their inner connecting ports are connected to the bottom of the inner side of the redistribution barrel (3). The overflow component (33) is of a certain quantity. The overflow component (33) is uniformly fixed at the bottom of the redistribution barrel (3). The inner side of the overflow component (33) is provided with a redistribution cavity (331). The outer connecting port of the U-shaped connecting component (32) is connected to the redistribution cavity (331) respectively. The bottom of the overflow component (33) is provided with a certain number of evenly distributed diverting components (332).

2. A packed distillation column according to claim 1, characterized in that, The flow tray (2) is arranged from top to bottom towards the middle. There is a flow gap (23) between the outermost part of the flow tray (2) and the tower body (1). A shielding ring (231) is fixed inside the tower body (1). The shielding ring (231) is located above the flow gap (23).

3. A packed distillation column according to claim 1, characterized in that, The diversion tray (2) includes a plurality of diversion ring plates (24) arranged in sequence and a blocking ring (241) fixed thereon. A plurality of air grooves (22) are respectively arranged between adjacent diversion ring plates (24), and the plurality of diversion ring plates (24) are all inclined inward.

4. A packed distillation column according to claim 3, characterized in that, The air grooves (22) are all triangular in shape, with one side of the air groove (22) being close to the adjacent blocking ring (241), and the outward sharp corner of the air groove (22) being away from the adjacent blocking ring (241).

5. A packed distillation column according to claim 4, characterized in that, The air grooves (22) of the adjacent flow-guiding ring plates (24) are staggered.

6. A packed distillation column according to claim 3, characterized in that, A dividing member (25) is fixed in the middle of the tower body (1). The dividing member (25) is located between several of the flow guiding ring plates (24) and the redistribution barrel (3). The upper end face of the dividing member (25) is inclined, and the lower end face of the dividing member (25) is arc-shaped.

7. A packed distillation column according to claim 1, characterized in that, The sides of several of the diverting components (332) are fixed to the inner wall of the overflow component (33), and the diverting components (332) and the interior of the overflow component (33) form a diversion groove (3321). Liquid overflowing the height of the diverting component (332) in the diversion groove (3321) flows out through the inside of the diverting component (332).

8. A packed distillation column according to claim 7, characterized in that, The diverter (332) is a strip with a V-shaped cross-section. A V-shaped slot (3322) is provided on the upper side of the diverter (332). The bottom of the diverter (332) and the distribution hole tube (31) are both designed with pointed tips.

9. A packed distillation column according to claim 7, characterized in that, A collection bucket (34) is fixedly provided in the middle of the inner side of the redistribution bucket (3). A filter screen (341) is fixedly provided inside the collection bucket (34). A plurality of pipes (342) are fixedly provided inside the redistribution bucket (3). One end of each pipe (342) is connected to the inner connection port of a plurality of U-shaped connectors (32). The other end of each pipe (342) is connected to the bottom of the collection bucket (34). The highest point of the top of each U-shaped connector (32) is located below the filter screen (341).

10. A packed distillation column according to claim 1, characterized in that, The tower body (1) is provided with a liquid inlet (11) and an air inlet (12) on the upper and lower sides respectively. The tower body (1) is provided with an air outlet (13) and a liquid outlet (14) at the upper and lower ends respectively. A distributor (15) is fixedly installed on the upper side inside the tower body (1). The distributor (15) is connected to the liquid inlet (11). Two corrugated packings (16) are fixedly installed inside the tower body (1). The two corrugated packings (16) are located above the diversion tray (2) and below the redistribution tank (3) respectively.

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