A new type of tray for rectification

Abstract

The utility model discloses a novel tray for rectification, including tray mechanism, the top of tray mechanism is provided with shunt mechanism and overflow weir, and shunt mechanism and overflow weir are located at both sides of tray mechanism respectively, and the below of tray mechanism is provided with the liquid fall guide plate at the one side of overflow weir. The utility model discloses through the sieve hole in tray mechanism adopts the center hole diameter less than the edge hole diameter and with the center twist five degrees, cooperation twist pipe structure, can balance the gas velocity of different area of tray, reduce local turbulence excessive concentration, reduce the entrainment phenomenon of mist, thereby promote the contact evenness and mass transfer efficiency of gas liquid two -phase, in addition, through the eccentric wheel drive push liquid plate reciprocating motion of the poking subassembly in shunt mechanism, make the directional disturbance of liquid layer on the top of tray, increase gas liquid contact probability.

Description

Technical Field

[0001] This utility model relates to the field of distillation column technology, and in particular to a novel column tray for distillation. Background Technology

[0002] The trays used in distillation columns are the core components for achieving efficient gas-liquid two-phase contact. Essentially, they enable the rising vapor and descending liquid to interact fully through a specific structure, completing heat transfer and mass exchange. Common forms include perforated trays (metal plates with uniformly distributed small holes), bubble cap trays (short tubes with caps covering round holes), and valve trays (valve plates that can float up and down to control the airflow).

[0003] Chinese patent CN208799792U discloses a tray for a distillation column, including a fixing ring and a tray body. The fixing ring is sleeved on the outside of the tray, and the tray body is detachably connected to the inner side of the fixing ring by a fastener. The fixing ring is composed of two identical semi-rings, one half of which has a first sliding member at each end, and the other half of which has a second sliding member at each end corresponding to the first sliding member. The first sliding member and the corresponding second sliding member are slidably connected and fixed by a first positioning member. The tray body is a circular plate formed by splicing two semi-circular plates. Several first through holes are spaced apart on each plate. One plate has a third sliding member on its straight edge, and the other plate has a fourth sliding member on its straight edge. The third sliding member and the fourth sliding member are slidably connected and positioned by a second positioning member. The tray has the following defects: (1) The airflow is concentrated in a local area of ​​the tray, forming a "gas surge" or "gas stagnation" phenomenon, resulting in insufficient gas-liquid contact and low mass transfer efficiency; (2) The design of the overflow weir and the downcomer can easily lead to a single liquid flow path, forming a flow deviation or dead zone, causing local liquid stagnation and affecting the mass transfer efficiency. Utility Model Content

[0004] The purpose of this invention is to solve the problems of insufficient gas-liquid contact, low mass transfer efficiency, and a single liquid path during liquid descent in existing tower trays.

[0005] The technical solution adopted by this utility model to solve its technical problem is as follows: a novel tray for distillation, comprising a tray mechanism, wherein a diversion mechanism and an overflow weir are provided above the tray mechanism, the diversion mechanism and the overflow weir are respectively located on both sides of the tray mechanism, and a downcomer is provided below the tray mechanism on the side of the overflow weir; the tray mechanism includes a tray and sieve holes opened above the tray, the diameter of the sieve holes at the center of the tray is smaller than the diameter of the sieve holes at the edge, a twisted tube is provided inside the sieve holes, and a float valve is slidably connected to the top of the twisted tube; the diversion mechanism includes a diversion box and an actuating component disposed inside the diversion box, an embedding groove is provided on one side of the diversion box, and the actuating component includes a rotating shaft rotatably connected to the diversion box and a pusher plate embedded in the embedding groove, and an eccentric wheel rotatably connected inside the diversion box.

[0006] Preferably, the middle part of the sieve holes and the twisted tube is twisted five degrees about the center of the tray mechanism, and the sieve hole density gradually increases from the inside to the outside of the tray center.

[0007] Preferably, the top of the distribution box is provided with a liquid inlet, and a liquid distribution channel is provided on one side of the distribution box. The liquid distribution channel is located above the embedding groove. A flow guide channel is provided inside the distribution box, and the flow guide channel connects the liquid inlet and the liquid distribution channel. A uniformly distributed liquid distribution guide plate is fixedly connected inside the liquid distribution channel, and a uniformly distributed liquid guide plate is fixedly connected to the outside of the liquid guide plate.

[0008] Preferably, all of the liquid distribution guide plates and liquid guide plates are inclined, and the inclination angle gradually increases from the middle to both sides.

[0009] Preferably, an impeller plate is fixedly connected around the outer periphery of the rotating shaft, the impeller plate is located inside the flow guide channel, and a gear one is fixedly connected to both ends of the rotating shaft. A gear two is meshed below the gear one, and the gear two is fixedly connected to one side of the eccentric wheel.

[0010] Preferably, a connecting rod is rotatably connected to the non-center part of the eccentric wheel, and one end of the connecting rod is rotatably connected to one side of the liquid pusher plate.

[0011] Preferably, a limiting rod is fixedly connected to one side of the liquid pusher plate, and the limiting rod is slidably connected inside the diversion box.

[0012] The beneficial effects of this utility model are:

[0013] (1) The sieve holes in the tray mechanism are made with a central aperture smaller than the edge aperture and twisted five degrees around the center. Combined with the twisted tube structure, the gas velocity in different areas of the tray can be balanced, local turbulence concentration can be reduced, and mist entrainment can be reduced, thereby improving the contact uniformity and mass transfer efficiency of the gas and liquid phases.

[0014] (2) The pusher plate is driven to reciprocate by the eccentric wheel through the actuating component in the diversion mechanism, which causes directional disturbance of the liquid layer above the tray and increases the probability of gas-liquid contact. Attached Figure Description

[0015] Figure 1 This is an overall perspective view of Embodiment 1 of the present utility model.

[0016] Figure 2 This is a schematic diagram of the tower plate mechanism according to Embodiment 1 of this utility model.

[0017] Figure 3 This is a schematic diagram of the internal structure of the diversion mechanism in Embodiment 1 of this utility model.

[0018] Figure 4 This is an embodiment of the present utility model. Figure 3 A schematic diagram of the middle section.

[0019] Figure 5 This is a schematic diagram of the toggle assembly according to Embodiment 1 of this utility model.

[0020] Explanation of reference numerals in the attached figures:

[0021] 1. Tray mechanism; 11. Tray; 12. Sieve hole; 13. Twisted tube; 14. Float valve; 2. Dividing mechanism; 21. Dividing box; 22. Liquid inlet; 23. Guide channel; 24. Liquid distribution channel; 25. Liquid distribution guide plate; 26. Embedded groove; 27. Actuating assembly; 271. Rotating shaft; 272. Impeller plate; 273. Gear one; 274. Gear two; 275. Eccentric wheel; 276. Connecting rod; 277. Pusher plate; 278. Limiting rod; 3. Overflow weir; 4. Downflow guide plate; 41. Guide plate. Detailed Implementation

[0022] The technical solution of this utility model will be further described in detail below through specific embodiments. It should be understood that the implementation of this utility model is not limited to the following embodiments, and any modifications and / or alterations made to this utility model will fall within the protection scope of this utility model.

[0023] like Figures 1-5 As shown, a novel tray for distillation includes a tray mechanism 1, a flow splitting mechanism 2 and an overflow weir 3 are arranged above the tray mechanism 1, the flow splitting mechanism 2 and the overflow weir 3 are respectively located on both sides of the tray mechanism 1, and a downcomer 4 is arranged below the tray mechanism 1 on one side of the overflow weir 3.

[0024] The tray mechanism 1 includes a tray 11 and a sieve hole 12 opened on the top of the tray 11. The diameter of the sieve hole 12 at the center of the tray 11 is smaller than that at the edge. A twisted tube 13 is provided inside the sieve hole 12. A float valve 14 is slidably connected to the top of the twisted tube 13. The diversion mechanism 2 includes a diversion box 21 and an actuating component 27 disposed inside the diversion box 21. An embedding groove 26 is opened on one side of the diversion box 21. The actuating component 27 includes a rotating shaft 271 rotatably connected to the diversion box 21, a pusher plate 277 embedded in the embedding groove 26, and an eccentric wheel 275 rotatably connected inside the diversion box 21. The tray 11, the float valve 14, the overflow weir 3, and the downcomer 4 constitute the tray of the distillation column in the prior art. The float valve 14 allows the gas phase below to push it, thereby allowing the gas phase to contact the solution located at a certain depth above the tray 11.

[0025] Furthermore, the middle portion of the sieve holes 12 and the twisted tube 13 is twisted five degrees about the center of the tray mechanism 1, and the density of the sieve holes 12 gradually increases from the inside to the outside about the center of the tray 11. The twisted tube 13 is the inner shape of the sieve holes 12. For ease of demonstration, both the sieve holes 12 and the twisted tube 13 are part of the tray 11. The distribution of the sieve holes 12 is dispersed in the middle and denser at the periphery with the tray 11 as the center, and the diameter of the middle hole is smaller than that of the edge hole. In conjunction with the twisted sieve holes 12 and the twisted tube 13, the gas phase distribution is optimized and the excessive concentration of local turbulence is reduced when the gas phase passes through the bottom of the tray 11.

[0026] Furthermore, the top of the distribution box 21 is provided with a liquid inlet 22, and a liquid distribution channel 24 is provided on one side of the distribution box 21. The liquid distribution channel 24 is located above the embedding groove 26. A flow guide channel 23 is provided inside the distribution box 21, which connects the liquid inlet 22 and the liquid distribution channel 24. The liquid distribution channel 24 is fixedly connected with uniformly distributed liquid guide plates 25, and the outer side of the liquid guide plate 4 is fixedly connected with uniformly distributed liquid guide plates 41. The liquid inlet 22 can receive and guide part of the solution into the interior of the flow guide channel 23, and because there is a gap between the trays, the solution can drive the rotating shaft 271 and the impeller plate 272 to rotate.

[0027] Furthermore, both the multiple liquid-dispersing guide plates 25 and the liquid-guiding plates 41 are inclined, with the inclination angle gradually increasing from the center to both sides. The liquid-dispersing guide plates 25 are used to disperse the solution, while the liquid-guiding plates 41 are used to concentrate the solution.

[0028] Furthermore, an impeller plate 272 is fixedly connected around the outer periphery of the rotating shaft 271. The impeller plate 272 is located inside the guide channel 23. Gear 1 273 is fixedly connected to both ends of the rotating shaft 271. Gear 22 274 is meshed below gear 1 273 and is fixedly connected to one side of the eccentric wheel 275. The liquid inlet 22 is located tangentially to the impeller plate 272, thereby driving the rotating shaft 271 to rotate. After rotation, the solution is discharged from the liquid distribution channel 24 of the guide channel 23.

[0029] Furthermore, a connecting rod 276 is rotatably connected to the non-center part of the eccentric wheel 275, and one end of the connecting rod 276 is rotatably connected to one side of the pusher plate 277. When the eccentric wheel 275 rotates, it can cause the pusher plate 277 to slowly reciprocate left and right through the connecting rod 276, thereby pushing the solution to a certain depth above the tray 11 and increasing the probability of gas-liquid contact.

[0030] Furthermore, a limiting rod 278 is fixedly connected to one side of the pusher plate 277, and the limiting rod 278 is slidably connected inside the diversion box 21. The limiting rod 278 is used to limit the sliding range and direction of the pusher plate 277.

[0031] The working principle of this utility model is as follows:

[0032] As the solution falls from above, it accumulates above tray mechanism 1. When the liquid level exceeds the overflow weir 3, it overflows the weir 3 and falls above the diversion mechanism 2 of another tray under the guidance of the downcomer 4. As the downcomer 4 guides the solution, it is concentrated towards the center by the guide plate 41, allowing some solution to enter the inlet 22 at the top of the diversion box 21. The solution then passes through the guide channel 23 and the distribution channel 24 to reach the top of tray 11, repeating the cycle. Meanwhile, the bottom of tray 11 is connected to the vapor phase device of the distillation column, allowing vapor to pass through the sieve holes. The twisted tube 13 inside the tray 12 lifts the float valve 14, allowing gas and liquid to come into contact. During this process, the sieve holes 12 above the tray 11 are small holes in the center and large holes at the edges, which can balance the gas velocity in different areas of the tray and optimize the gas phase distribution. At the same time, since both the sieve holes 12 and the twisted tube 13 are twisted perforated tubes, they can change the airflow direction, reduce excessive concentration of local turbulence, reduce mist entrainment, and when some solution passes through the interior of the liquid distribution channel 24, it can be evenly dispersed by the liquid distribution guide plate 25 to ensure the uniformity of the solution when it flows to the tray 11 below.

[0033] Additionally, when the solution passes through the interior of the guide channel 23, the impeller plate 272 causes the rotating shaft 271 to rotate continuously, thereby causing the gear 274 and the eccentric wheel 275 to rotate. This, after being transmitted through the connecting rod 276, causes the pusher plate 277 to rotate slowly back and forth, so that the solution above the tray 11 with a liquid level lower than the top of the overflow weir 3 can be disturbed, thereby increasing the probability of contact between the solution and the gas phase.

[0034] It should be noted that, for those skilled in the art, several improvements and modifications can be made to this utility model without departing from the principle of this utility model, and these improvements and modifications also fall within the protection scope of the claims of this utility model.

Claims

1. A novel tray for distillation, comprising a tray mechanism (1), characterized in that, A diversion mechanism (2) and an overflow weir (3) are provided above the tray mechanism (1). The diversion mechanism (2) and the overflow weir (3) are located on both sides of the tray mechanism (1). A downcomer (4) is provided below the overflow weir (3) on the side of the tray mechanism (1). The tray mechanism (1) includes a tray (11) and a sieve hole (12) opened above the tray (11). The diameter of the sieve hole (12) at the center of the tray (11) is smaller than the diameter at the edge. A twisted tube (1) is provided inside the sieve hole (12). 3) A float valve (14) is slidably connected to the top of the twisted tube (13); the diversion mechanism (2) includes a diversion box (21) and an actuating component (27) set inside the diversion box (21). An embedding groove (26) is opened on one side of the diversion box (21). The actuating component (27) includes a rotating shaft (271) rotatably connected to the diversion box (21) and a liquid pusher plate (277) embedded in the embedding groove (26), as well as an eccentric wheel (275) rotatably connected inside the diversion box (21).

2. The novel tray for distillation according to claim 1, characterized in that, The middle part of the sieve hole (12) and the twisted tube (13) is twisted five degrees around the center of the tray mechanism (1), and the density of the sieve hole (12) gradually increases from the inside to the outside around the center of the tray (11).

3. A novel tray for distillation according to claim 1, characterized in that, The top of the distribution box (21) is provided with a liquid inlet (22), and a liquid distribution channel (24) is provided on one side of the distribution box (21). The liquid distribution channel (24) is located above the embedding groove (26). A flow guide channel (23) is provided inside the distribution box (21). The flow guide channel (23) connects the liquid inlet (22) and the liquid distribution channel (24). The liquid distribution channel (24) is fixedly connected with uniformly distributed liquid guide plates (25). The outer side of the liquid guide plate (4) is fixedly connected with uniformly distributed liquid guide plates (41).

4. A novel tray for distillation according to claim 3, characterized in that, All of the liquid guide plates (25) and liquid guide plates (41) are inclined, and the inclination angle gradually increases from the middle to both sides.

5. A novel tray for distillation according to claim 1, characterized in that, An impeller plate (272) is fixedly connected around the outer periphery of the rotating shaft (271). The impeller plate (272) is located inside the guide channel (23). Gear 1 (273) is fixedly connected to both ends of the rotating shaft (271). Gear 2 (274) is meshed below gear 1 (273). Gear 2 (274) is fixedly connected to one side of the eccentric wheel (275).

6. A novel tray for distillation according to claim 1, characterized in that, The eccentric wheel (275) is rotatably connected to a connecting rod (276) at the non-center position, and one end of the connecting rod (276) is rotatably connected to one side of the pusher plate (277).

7. A novel tray for distillation according to claim 1, characterized in that, One side of the push plate (277) is fixedly connected to a limiting rod (278), and the limiting rod (278) is slidably connected inside the diversion box (21).

Images