Packing rectifying tower

Abstract

The invention relates to the technical field of chemical equipment, in particular to a packed rectifying tower which comprises a tower body, a tower plate group, a liquid storage tower, a reboiler and a condenser, and a liquid inlet, a gas outlet, a gas inlet and a liquid outlet are formed in the tower body; the tower plate group comprises a first tower plate, a second tower plate... an Nth tower plate, the first tower plate, the second tower plate... the Nth tower plate are spirally inserted into the tower body, and liquid hoppers for containing liquid are arranged on the first tower plate, the second tower plate... the Nth tower plate; the liquid storage tower is used for storing liquid; the reboiler is used for heating liquid into steam; the condenser is used for cooling steam. During use, steam is upward, liquid is downward, the steam and the liquid exchange heat and mass for distillation, and the spiral tower plate group is arranged, so that the gas-liquid contact area is larger, the gas-liquid contact time is longer, the gas-liquid mass transfer effect is better, and the production efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of chemical equipment, in particular to a packed distillation tower. Background Art

[0002] A distillation tower is a tower-type gas-liquid contact device for distillation. It mainly utilizes the different volatilities of the components in the mixture, that is, the different vapor pressures of the components at the same temperature, to transfer the light components (low boiling substances) in the liquid phase to the gas phase, and the heavy components (high boiling substances) in the gas phase to the liquid phase, thereby achieving the purpose of separation.

[0003] In the related art, for example, Chinese patent application CN106390503A discloses a plate-type packed distillation tower. When the plate-type packed distillation tower is in use, the refluxed liquid enters the liquid guide pipe from the top of the tower, flows along the upper tower plate through the liquid guide pipe, flows from the sieve holes on the upper tower plate and the lower edge of the upper tower plate to the inlet end of the lower tower plate, and the liquid flows back to the liquid guide pipe along the lower tower plate again, and then enters the packing structure. After flowing out of the packing structure, the first-stage distillation is completed and the liquid flows along the upper tower plate again through the liquid guide pipe. In this process, the gas rises from the tower bottom and is fully mixed with the liquid for mass transfer.

[0004] Although the above-mentioned plate-type packed distillation tower can realize the distillation of materials, it is found in actual use that the materials move along a straight up and down path in the plate-type packed distillation tower, resulting in a shorter contact time between the liquid material and the gaseous material, affecting the distillation effect. Summary of the invention

[0005] Based on this, it is necessary to provide a packed distillation tower to address the problem of poor distillation effect in the distillation process of the current distillation tower.

[0006] The above purpose is achieved through the following technical solutions: A packed distillation tower, comprising a tower body, a tower plate group, a liquid storage tower, a reboiler and a condenser, wherein the tower body is provided with a liquid inlet, a gas outlet, a gas inlet and a liquid outlet; the tower plate group comprises a first tower plate, a second tower plate ... an Nth tower plate, the first tower plate, the second tower plate ... the Nth tower plate are spirally inserted into the tower body, and the first tower plate, the second tower plate ... the Nth tower plate are all provided with a liquid hopper, the liquid hopper is used to contain liquid; N is a natural number greater than or equal to three; the liquid storage tower is used to store the liquid; the reboiler is used to heat the liquid into steam; the condenser is used to cool the steam; When in use, the liquid inside the liquid storage tower is passed into the top of the tower body from the liquid inlet, the liquid flows to the lower part through the spiral tower plate group, and then enters the reboiler through the liquid outlet, the reboiler boils the liquid into steam, and the steam is then passed into the bottom of the tower body from the air inlet, the steam goes up, and the liquid goes down, and the two exchange heat and mass to perform distillation; finally, the steam is passed into the condenser from the air outlet for condensation, and the condensed liquid is then passed into the top of the tower body from the liquid inlet to achieve distillation.

[0007] Furthermore, the packed distillation tower also includes a center frame, which is rotatably disposed in the tower body, and the first tower plate, the second tower plate ... the Nth tower plate are disposed on the center frame.

[0008] Furthermore, the packed distillation tower also includes a first driving member, and the first driving member is used to provide a driving force for the movement of the central frame.

[0009] Furthermore, the tower plate group is provided with an arc plate and a baffle rod, and the baffle rod is provided at one end of the arc plate.

[0010] Furthermore, a scraper is provided on the tower plate group, and the scraper is used to scrape off the liquid adhering to the inner wall of the tower body.

[0011] Furthermore, the tower plate group is provided with a guide block, a first elastic member and a second elastic member, and adjacent tower plates are connected through the guide block, the first elastic member and the second elastic member; it also includes a second driving member, which provides a driving force for the movement of the first tower plate, and the Nth tower plate is fixedly arranged on the tower body.

[0012] Furthermore, the tower plate group is provided with an inclined plate and an overflow plate, and the overflow plate is arranged on the inclined plate.

[0013] Furthermore, the volumes of the liquid buckets on the first tower plate, the second tower plate, ... the Nth tower plate increase sequentially.

[0014] Furthermore, a plurality of connecting channels are provided on the liquid bucket.

[0015] Furthermore, packing blocks are arranged on the tower plate.

[0016] The beneficial effects of the present invention are: When the packed distillation tower provided by the present invention is in use, the liquid inside the liquid storage tower is passed into the top of the tower body from the liquid inlet, the liquid flows to the lower part through the spiral tower plate group, and then enters the reboiler through the liquid outlet. The reboiler boils the liquid into steam, and the steam is then passed into the bottom of the tower body from the air inlet. The steam goes up and the liquid goes down, and the two exchange heat and mass to perform distillation; finally, the steam is passed into the condenser from the air outlet for condensation, and the condensed liquid is then passed into the top of the tower body from the liquid inlet to achieve distillation. By setting the spiral tower plate group, the gas-liquid contact area is larger, the gas-liquid contact time is longer, and the gas-liquid mass transfer effect is better, thereby improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the distillation principle of a packed distillation tower provided in one embodiment of the present invention; Figure 2 A schematic diagram of the three-dimensional structure of a packed distillation tower provided in one embodiment of the present invention; Figure 3 A schematic diagram of the exploded structure of parts of a packed distillation tower provided in one embodiment of the present invention; Figure 4 A schematic cross-sectional structural diagram of a tower body of a packed distillation tower provided in one embodiment of the present invention; Figure 5 A schematic diagram of the three-dimensional structure of a center frame of a packed distillation tower provided in one embodiment of the present invention; Figure 6 A schematic diagram of the three-dimensional structure of a spiral tray of a packed distillation tower provided in one embodiment of the present invention; Figure 7 A schematic diagram of the three-dimensional structure of adjacent plates of a packed distillation tower provided in one embodiment of the present invention; Figure 8 A schematic diagram of the three-dimensional structure of a tower plate of a packed distillation tower provided in one embodiment of the present invention.

[0018] in: 100. Distillation tower; 110, tower body; 111, liquid inlet; 112, air outlet; 113, air inlet; 114, liquid outlet; 115, driving motor; 116, limiting ring groove; 120, center frame; 121, support shaft; 122, limit ring; 123, drive rotary cylinder; 124, drive ring; 130, tower plate; 131, base; 1311, guide block; 1312, first spring; 1313, second spring; 132, liquid bucket; 133, overflow plate; 134, scraper; 135, arc plate; 136, limit slide; 137, packing block; 138, stop rod; 139, inclined plate; 200. Liquid storage tower; 300, reboiler; 400. Condenser. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0020] The serial numbers assigned to the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in the present invention, unless otherwise specified, include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0021] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0022] like Figures 1 to 8As shown, a packed distillation tower provided in one embodiment of the present invention utilizes the different volatilities of the components in the mixture, that is, the different vapor pressures of the components at the same temperature, so that the light components (low boiling substances) in the liquid phase are transferred to the gas phase, and the heavy components (high boiling substances) in the gas phase are transferred to the liquid phase, thereby achieving the purpose of separation; the packed distillation tower includes a liquid storage tower 200, a reboiler 300 and a condenser 400, a tower body 110 and a tower plate group, and the tower body 110 is provided with a liquid inlet 111, a gas outlet 112, an air inlet 113, and a gas outlet 114. The tower body 110 has a tower plate 130, a second tower plate 130 ... an Nth tower plate 130, and a liquid hopper 132 is arranged on the first tower plate 130, the second tower plate 130 ... the Nth tower plate 130. The liquid hopper 132 is used to contain liquid. The first tower plate 130, the second tower plate 130 ... the Nth tower plate 130 are spirally arranged in the tower body 110; the liquid storage tower 200 is used to store liquid; the reboiler 300 is used to heat the liquid into steam; and the condenser 400 is used to cool the steam.

[0023] When in use, the liquid storage tower 200 passes the liquid from the liquid inlet 111 into the top of the distillation tower 100 (a nozzle is provided at one end of the liquid inlet 111 facing the inside of the tower body 110 so that the liquid can fully cover the tower plate group), the liquid flows to the lower part through the spiral tower plate group, and then enters the reboiler 300 through the liquid outlet 114, the reboiler 300 boils the liquid into steam, and the steam is then passed from the air inlet 113 into the bottom of the tower body 110, the steam goes up, and the liquid goes down, and the two exchange heat and mass to perform distillation; finally, the steam is passed from the air outlet 112 into the condenser 400 for condensation, and the condensed liquid is then passed from the liquid inlet 111 into the top of the tower plate 130 for distillation.

[0024] By setting up a spiral tower plate group, the gas-liquid contact area is larger, the gas-liquid contact time is longer, and the gas-liquid mass transfer effect is better, thereby improving production efficiency.

[0025] In some embodiments, the packed distillation tower includes a center frame 120, and the center frame 120 includes a support shaft 121, a limit ring 122, and a drive ring 124. One end of the support shaft 121 is fixedly connected to the limit ring 122, and the other end is fixedly connected to the drive ring 124; the limit ring 122 can be rotatably sleeved on the limit ring groove 116 near the gas outlet 112, and the drive ring 124 can be rotatably sleeved on the limit ring groove 116 near the liquid outlet 114; the first tower plate 130, the second tower plate 130...the Nth tower plate 130 are arranged on the center frame 120, and the tower plate group rotates with the rotation of the center frame 120, so that the gas-liquid mass transfer effect is better, thereby improving production efficiency.

[0026] In some embodiments, the packed distillation column is configured to further include a first driving member, and the first driving member is used to provide a driving force for the movement of the central frame 120 .

[0027] Specifically in this embodiment, the first driving member is configured as a driving motor 115, such as Figure 4 As shown, the drive motor 115 is fixedly connected to the outer wall of the tower body 110 by bolts during installation, and the motor shaft of the drive motor 115 is arranged downward, a first gear is fixedly sleeved on the motor shaft of the drive motor 115, a second gear is fixedly sleeved on the drive ring 124, and the second gear is meshed with the first gear to drive the center frame 120 to rotate.

[0028] More specifically, to ensure smooth meshing of the second gear and the first gear, a mounting hole may be provided on the outer peripheral wall of the tower body 110 , and the first gear passes through the mounting hole during installation to mesh with the second gear.

[0029] More specifically, in order to avoid leakage of gaseous materials, a sealing shell may be provided on the outside of the driving motor 115 .

[0030] In some embodiments, the first tower plate 130, the second tower plate 130...the Nth tower plate 130 are all provided with arc plates 135 and baffle rods 138, and the baffle rods 138 are fixedly connected to the arc plates 135. During the distillation process, the driving motor 115 drives the central frame 120 to rotate periodically, so that part of the liquid in the liquid bucket 132 is lifted up, dispersed under the obstruction of the baffle rods 138, and exchanges heat and mass with steam, thereby improving the heat and mass exchange efficiency.

[0031] In some embodiments, a scraper 134 is provided on the first tower plate 130, the second tower plate 130...the Nth tower plate 130, and the scraper 134 is fixedly connected to the base 131. The driving motor 115 drives the central frame 120 to rotate periodically, thereby driving the scraper 134 to scrape off the liquid adhered to the inner circumferential wall of the tower body 110.

[0032] In some embodiments, the first tray 130, the second tray 130, ... the Nth tray 130 are all provided with a guide block 1311, a first elastic member and a second elastic member, and the packed distillation tower includes a second driving member. In this embodiment, the first elastic member is a first spring 1312, the second elastic member is a second spring 1313, and the second driving member is a driving rotary cylinder 123; for ease of description, adjacent trays 130 are named upper tray 130 and lower tray 130, and the upper tray 130 is The upper tower plate 130 and the lower tower plate 130 can rotate relatively, wherein the guide block 1311 of the upper tower plate 130 can be slidably sleeved in the limiting slide groove 136 on the lower tower plate 130, one end of the first spring 1312 is fixedly connected to the guide block 1311 of the upper tower plate 130, and the other end is fixedly connected to the base 131 of the lower tower plate 130, and one end of the second spring 1313 is fixedly connected to the guide block 1311 of the upper tower plate 130, and the other end is fixedly connected to the base 131 of the lower tower plate 130. The driving rotary cylinder 123 can be rotatably sleeved on the support shaft 121, and is arranged close to the limiting ring 122.

[0033] The first tray 130 (close to the gas outlet 112) is connected to the driving rotary cylinder 123, and the first tray 130 can rotate relative to the support shaft 121 under the driving of the driving rotary cylinder 123; the Nth tray 130 (close to the liquid outlet 114) is fixedly connected to the driving ring 124; according to the different solutions in the distillation tower 100, the first tray 130 is driven to rotate relative to the support shaft 121 by driving the rotary cylinder 123: when the tray 130 rotates, the overlapping part between adjacent trays 130 increases, The distance traveled by the liquid from the liquid inlet 111 to the liquid outlet 114 is shortened, and the distance traveled by the gas from the gas inlet 113 to the gas outlet 112 is shortened, thereby shortening the gas-liquid exchange time and improving the distillation efficiency; when the tower plate 130 rotates, the overlapping part between adjacent tower plates 130 is reduced, and the distance traveled by the liquid from the liquid inlet 111 to the liquid outlet 114 is increased, and the distance traveled by the gas from the gas inlet 113 to the gas outlet 112 is increased, thereby making the gas-liquid exchange more sufficient and the distillation effect better.

[0034] In some embodiments, the first tower plate 130, the second tower plate 130 ... the Nth tower plate 130 are all provided with inclined plates 139 and overflow plates 133, the inclined plates 139 are fixedly connected to the base 131, and the overflow plates 133 are fixedly connected to the inclined plates 139; for the liquid in the same liquid hopper 132, the liquid overflows into the adjacent tower plate 130 through the overflow plate 133, thereby making the gas-liquid contact area larger and the gas-liquid contact time longer.

[0035] In some embodiments, the slope of the inclined plate 139 of the tower plate 130 remains unchanged from top to bottom along the axial direction of the support shaft 121, and the liquid capacity of the liquid bucket 132 gradually increases from top to bottom as it gets closer to the base 131, that is, from top to bottom along the axial direction of the support shaft 121. This is because the temperature of the steam increases from top to bottom along the axial direction of the support shaft 121, thereby increasing the gas-liquid contact area, thereby improving the heat and mass exchange efficiency and achieving a better distillation effect.

[0036] In some embodiments, a plurality of through holes are provided in the liquid bucket 132 for passing the solution; part of the liquid falls through the mesh holes at the bottom of the liquid bucket 132 to form a liquid curtain, and exchanges heat and mass with the steam, thereby improving the heat and mass exchange efficiency.

[0037] It can be understood that the sizes of the through holes in the liquid hoppers 132 on the first tower plate 130, the second tower plate 130...the Nth tower plate 130 can be the same or different. When the sizes of the through holes are different, that is, from top to bottom along the axial direction of the support shaft 121, the sizes of the through holes in the liquid hoppers 132 on the first tower plate 130, the second tower plate 130...the Nth tower plate 130 increase successively. Because the temperature of the steam increases successively from top to bottom along the axial direction of the support shaft 121, by changing the size of the liquid hopper 132, the liquid curtain formed by the liquid passing through the through holes is adapted to the temperature of the steam: that is, the higher the steam temperature, the larger the through hole size, so that the gas-liquid mass transfer effect is better.

[0038] In some embodiments, the first tower plate 130, the second tower plate 130...the Nth tower plate 130 are all provided with packing blocks 137, and the packing blocks 137 are fixedly connected to the base 131. Part of the liquid falls into the packing of the packing blocks 137 and exchanges heat and mass with the steam rising from the bottom, thereby improving the heat and mass exchange efficiency.

[0039] It can be understood that the filler block 137 can adopt bulk filler and structured filler, wherein the bulk filler is a particle with a certain geometric shape and size. The more typical bulk fillers mainly include: Raschig ring filler, ball ring filler, step ring filler, arc saddle filler, rectangular saddle filler, metal ring rectangular saddle filler and spherical filler; the structured filler can adopt grid filler, corrugated filler and pulse filler, etc.

[0040] In combination with the above embodiments, the use principle and working process of the embodiments of the present invention are as follows: The packed distillation tower includes a distillation tower 100 , a liquid storage tower 200 , a reboiler 300 and a condenser 400 .

[0041] The distillation tower 100 includes a tower body 110, a center frame 120 and a tower plate 130. The tower body 110 is provided with a liquid inlet 111, a gas outlet 112, a gas inlet 113, a liquid outlet 114 and a limiting ring groove 116. The drive motor 115 is fixedly connected to the outer circumferential wall surface of the tower body 110 by bolts. The drive motor 115 drives the drive ring 124 to rotate, thereby driving the center frame 120 to rotate (the drive motor 115 is set to start and stop periodically).

[0042] The center frame 120 includes a support shaft 121, a limit ring 122, a driving rotation cylinder 123 and a driving ring 124. One end of the support shaft 121 is fixedly connected to the limit ring 122, and the other end is fixedly connected to the driving ring 124; the driving rotation cylinder 123 is rotatably sleeved on the support shaft 121 and is arranged close to the limit ring 122. The limit ring 122 is rotatably sleeved on the limit ring groove 116 close to the gas outlet 112, and the driving ring 124 is rotatably sleeved on the limit ring groove 116 close to the liquid outlet 114.

[0043] The tower plate 130 includes a base 131 , a liquid hopper 132 , an overflow plate 133 , a scraper 134 , an arc plate 135 , a limiting slide 136 , a filling block 137 , a blocking rod 138 and an inclined plate 139 . The arc plate 135, the limiting slide groove 136, the filler block 137 and the inclined plate 139 are all fixedly connected to the base 131; along the radial direction of the base 131, the closer to the center of the circle, the lower the height of the inclined plate 139 (the projection of the inclined plate 139 on the base 131 is a right-angled trapezoid), that is, the liquid can only flow out through the lowest point; the overflow plate 133 is fixedly connected to the inclined plate 139; the scraper 134 is fixedly connected to the base 131 to scrape off the liquid adhered to the inner circumferential wall of the tower body 110; the baffle 138 is fixedly connected to the arc plate 135; the base 131, the arc plate 135 and the inclined plate 139 form a liquid bucket 132, and a plurality of through holes are provided in the liquid bucket 132 for passing the solution.

[0044] The tower plate 130 is sleeved on the support shaft 121. There are multiple tower plates 130, which are spirally arranged on the central frame 120 with the axis of the support shaft 121 as the axis. For the convenience of description, adjacent tower plates 130 are named upper tower plate 130 and lower tower plate 130. The upper tower plate 130 and the lower tower plate 130 can rotate relative to each other, wherein the guide block 1311 of the upper tower plate 130 can be slidably sleeved in the limiting slide groove 136 on the lower tower plate 130, one end of the first spring 1312 is fixedly connected to the guide block 1311 of the upper tower plate 130, and the other end is fixedly connected to the base 131 of the lower tower plate 130, and one end of the second spring 1313 is fixedly connected to the guide block 1311 of the upper tower plate 130, and the other end is fixedly connected to the base 131 of the lower tower plate 130.

[0045] The top tray 130 (close to the gas outlet 112) is connected to the driving rotary cylinder 123, and the top tray 130 can rotate relative to the support shaft 121 under the driving of the driving rotary cylinder 123; the bottom tray 130 (close to the liquid outlet 114) is fixedly connected to the driving ring 124; according to the different solutions in the distillation tower 100, the top tray 130 is driven to rotate relative to the support shaft 121 by driving the rotary cylinder 123: the tray 130 rotates so that the overlapping parts between adjacent trays 130 When it increases, the distance traveled by the liquid from the liquid inlet 111 to the liquid outlet 114 becomes shorter, and the distance traveled by the gas from the air inlet 113 to the air outlet 112 becomes shorter, thereby shortening the gas-liquid exchange time and improving the distillation efficiency; when the tower plate 130 rotates and the overlapping part between adjacent tower plates 130 is reduced, the distance traveled by the liquid from the liquid inlet 111 to the liquid outlet 114 becomes longer, and the distance traveled by the gas from the air inlet 113 to the air outlet 112 becomes longer, thereby making the gas-liquid exchange more sufficient and the distillation effect better.

[0046] From top to bottom along the axial direction of the support shaft 121, the slope of the inclined plate 139 of the tower plate 130 remains unchanged, and the closer to the base 131 from top to bottom, that is, from top to bottom along the axial direction of the support shaft 121, the liquid capacity of the liquid bucket 132 gradually increases, thereby adapting to the distillation process and achieving a better distillation effect.

[0047] First, the overlapping areas between adjacent trays 130 are adjusted according to the type of solution.

[0048] The liquid storage tower 200 passes the liquid from the liquid inlet 111 into the top of the distillation tower 100. The liquid flows to the lower part through the tower plate 130 and then enters the reboiler 300 through the liquid outlet 114. The reboiler 300 boils the liquid into steam, and the steam is then passed from the air inlet 113 into the bottom of the tower body 110. The steam goes up and the liquid goes down, and the two exchange heat and quality to perform distillation. Finally, the steam is passed from the air outlet 112 into the condenser 400 for condensation, and the condensed liquid is then passed from the liquid inlet 111 into the top of the tower plate 130 for distillation.

[0049] For the liquid in the same hopper 132, part of the liquid flows out through the mesh in the hopper 132 and enters the next tower plate 130, and part of the liquid overflows through the overflow plate 133 and enters the adjacent tower plate 130; during the distillation process, the driving motor 115 drives the central frame 120 to rotate periodically, so that part of the liquid in the hopper 132 is lifted up, dispersed under the blocking of the blocking rod 138, and exchanges heat and mass with the steam. Part of the liquid falls through the mesh at the bottom of the hopper 132 to form a liquid curtain, and exchanges heat and mass with the steam. Part of the liquid falls into the packing of the packing block 137, and exchanges heat and mass with the steam rising from the bottom. Part of the steam passes through the bottom of the hopper 132 to exchange heat and mass with the liquid inside the hopper 132. Part of the liquid in the hopper 132 overflows from the overflow plate 133 and enters the next tower plate 130. By setting the driving motor 115 to start and stop periodically, the baffle 138, the overflow plate 133, the filler block 137 and the tower plate 130, the liquid and the steam are fully in contact, the heat and mass exchange time is increased, and the heat and mass exchange efficiency is improved.

[0050] At the same time, a steam detector is provided at the outlet position of the gas outlet 112 to monitor the outflowing steam volume: when the outflowing steam volume increases, the rotary cylinder 123 is controlled to drive the top tray 130 to rotate, increasing the spiral path; when the outflowing steam volume decreases, the rotary cylinder 123 is controlled to drive the top tray 130 to rotate, shortening the spiral path to stabilize the outflowing steam volume. This part is electronically controlled and fine-tuned to avoid insufficient heat and mass exchange between liquid and gas.

[0051] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0052] The above-described embodiments only express several implementation methods of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several modifications and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A packed distillation tower, characterized in that: The packed distillation tower comprises a tower body, a tower plate group, a liquid storage tower, a reboiler and a condenser, wherein the tower body is provided with a liquid inlet, a gas outlet, a gas inlet and a liquid outlet; the tower plate group comprises a first tower plate, a second tower plate ... an Nth tower plate, the first tower plate, the second tower plate ... the Nth tower plate are spirally inserted inside the tower body, and the first tower plate, the second tower plate ... the Nth tower plate are all provided with a liquid hopper, and the liquid hopper is used to contain liquid; N is a natural number greater than or equal to three; the liquid storage tower is used to store the liquid; the reboiler is used to heat the liquid into steam; the condenser is used to cool the steam; When in use, the liquid inside the liquid storage tower is passed into the top of the tower body from the liquid inlet, the liquid flows to the lower part through the spiral tower plate group, and then enters the reboiler through the liquid outlet, the reboiler boils the liquid into steam, and the steam is then passed into the bottom of the tower body from the air inlet, the steam goes up, and the liquid goes down, and the two exchange heat and mass to perform distillation; finally, the steam is passed into the condenser from the air outlet for condensation, and the condensed liquid is then passed into the top of the tower body from the liquid inlet to achieve distillation.

2. The packed distillation tower according to claim 1, characterized in that: The packed distillation tower further comprises a central frame, which is rotatably disposed in the tower body, and the first tower plate, the second tower plate ... the Nth tower plate are all disposed on the central frame.

3. The packed distillation tower according to claim 2, characterized in that: The packed distillation tower further includes a first driving member, which is used to provide a driving force for the movement of the central frame.

4. The packed distillation tower according to claim 3, characterized in that: The tower plate group is provided with an arc plate and a baffle rod, and the baffle rod is arranged at one end of the arc plate.

5. The packed distillation tower according to claim 3, characterized in that: The tower plate group is provided with a scraper, and the scraper is used to scrape off the liquid adhering to the inner wall of the tower body.

6. The packed distillation tower according to claim 1, characterized in that: The tower plate group is provided with a guide block, a first elastic member and a second elastic member, and adjacent tower plates are connected by the guide block, the first elastic member and the second elastic member; it also includes a second driving member, which provides a driving force for the movement of the first tower plate, and the Nth tower plate is fixedly arranged on the tower body.

7. The packed distillation tower according to claim 1, characterized in that: The tower plate group is provided with an inclined plate and an overflow plate, and the overflow plate is arranged on the inclined plate.

8. The packed distillation tower according to claim 1, characterized in that: The volumes of the liquid buckets on the first tower plate, the second tower plate, ... the Nth tower plate increase sequentially.

9. The packed distillation tower according to claim 1, characterized in that: The liquid hopper is provided with a plurality of connecting channels.

10. The packed distillation tower according to claim 1, characterized in that: The tower plate group is provided with packing blocks.

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