Recovery tower

Abstract

The utility model relates to the technical field of ethyl acetate production, in particular to a recovery tower which comprises a tower body, a plurality of liquid distributors, a demister and a heat exchange mechanism, an air outlet is formed in the top of the tower body, a waste discharge port is formed in the bottom of the tower body, a plurality of structured packing sections are arranged in the tower body, and grid plates are arranged at the bottoms of the structured packing sections; the plurality of liquid distributors are dispersedly arranged in the tower body, and the adjacent liquid distributors are separated by regular packing sections; the demister is arranged on the top of the liquid distributor and the structured packing section; the heat exchange mechanism comprises a mounting frame, a coil pipe and a plurality of fixing ring buckles, the mounting frame is arranged at the bottom of the tower body, and the coil pipe is fixedly mounted on the mounting frame through the fixing ring buckles; and the two ends of the coil pipe penetrate out of the tower body and form connecting pipes. According to the recovery tower, the demister is arranged in the existing recovery tower, so that foam generated after liquid distribution of the liquid distributor can be eliminated, waste liquid is treated in the structured packing section, and evaporation and recovery of ethanol in the waste liquid are facilitated.

Description

Technical Field

[0001] This utility model relates to the field of ethyl acetate production technology, specifically to a recovery tower. Background Technology

[0002] Currently, the production of ethyl acetate requires the recovery and reuse of ethanol from waste materials, a process typically carried out within a recovery tower. However, after the waste liquid is introduced into the recovery tower and distributed through a distributor, it generates a significant amount of foam. This foam accumulates on top of the packing material, not only compressing and occupying the space between the packing and the distributor, but also affecting the flow of waste liquid from the distributor and the resistance entering the packing, thus reducing the recovery capacity. Utility Model Content

[0003] In order to overcome one of the shortcomings of the existing technology, the purpose of this utility model is to provide a recovery tower with strong recovery capacity and effective removal of foam generated by the liquid distributor.

[0004] To solve the above problems, the technical solution adopted by this utility model is as follows:

[0005] A recovery tower includes a tower body, several liquid distributors, a demister, and a heat exchange mechanism. The tower body has an air outlet at the top and a waste outlet at the bottom. Several structured packing sections are arranged inside the tower body, each with a grid plate at its bottom. Several liquid distributors are dispersed within the tower body, with adjacent distributors separated by the structured packing sections. Demisters are positioned on top of the liquid distributors and the structured packing sections. The heat exchange mechanism includes a mounting frame, a coil, and several fixing rings. The mounting frame is located at the bottom of the tower body, and the coil is fixedly mounted on the mounting frame using the fixing rings. Both ends of the coil extend out of the tower body to form connecting pipes.

[0006] Furthermore, a mounting platform is provided at the bottom of the tower body, and the mounting bracket is mounted on the mounting platform.

[0007] Furthermore, a number of air outlets are also provided on the middle part of the tower body, and the air outlets located in the middle part of the tower body are located in the area of ​​the tower body between the liquid distributor and the structured packing section.

[0008] Furthermore, a redistributor is provided at the bottom of the grid plate.

[0009] Furthermore, a grid plate is provided at the top of the structured packing section, and the outer periphery of the grid plate is connected to the inner wall of the tower.

[0010] Furthermore, the liquid distributor includes a base, a liquid distribution trough, and an inlet pipe. The base is installed on the inner wall of the tower body, the liquid distribution trough is disposed on the base, one end of the inlet pipe is connected to the liquid distribution trough, and the other end passes through the tower body. The bottom of the liquid distribution trough is provided with a plurality of liquid outlet cylinders, the top of the liquid outlet cylinders is connected to the liquid distribution trough, the top of the liquid outlet cylinders is provided with a V-shaped liquid collecting guide plate, the V-shaped liquid collecting guide plate is provided with a plurality of leakage holes, the lower end of the liquid outlet cylinders is provided with a liquid outlet guide tube, and the liquid outlet guide tube is provided with a plurality of liquid outlet channels.

[0011] Furthermore, the liquid distribution tank is provided with several overflow outlets.

[0012] Furthermore, a plurality of mounting legs are provided on the outer periphery of the base, and the mounting legs are mounted on mounting brackets on the inner wall of the tower body.

[0013] Furthermore, a support plate is provided at the bottom of the base, and the lower ends of all the liquid outlet guide tubes extend through the support plate.

[0014] Furthermore, the demister is a baffle plate demister or a wire mesh demister.

[0015] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0016] This invention relates to a recovery tower that incorporates a demister within the existing recovery tower. This demister effectively eliminates foam generated after the liquid distributor dispenses the liquid, allowing the structured packing section to process the waste liquid more efficiently and facilitating the evaporation and recovery of ethanol from the waste liquid. A heat exchange mechanism is installed at the bottom of the tower to ensure that the temperature of the entire waste liquid remains above the boiling point of ethanol during processing, thus guaranteeing high recovery efficiency.

[0017] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the internal structure of an embodiment of the present utility model;

[0019] Figure 2 This is a schematic diagram of the heat exchange mechanism in an embodiment of this utility model;

[0020] Figure 3 This is a schematic diagram of the liquid distributor in an embodiment of this utility model.

[0021] Explanation of icon numbers:

[0022] 10. Tower body; 11. Gas outlet; 12. Waste discharge port; 13. Structured packing section; 14. Grid plate; 15. Grid pressure plate; 16. Mounting platform; 20. Liquid distributor; 21. Base; 22. Liquid distribution trough; 23. Liquid inlet pipe; 24. Liquid outlet cylinder; 25. V-shaped liquid collection guide plate; 26. Liquid outlet guide cylinder; 27. Liquid outlet channel; 28. Overflow trough; 29. ​​Mounting leg; 30. Demister; 40. Heat exchange mechanism; 41. Mounting bracket; 42. Coil; 43. Fixing ring; 44. Connecting pipe; 50. Redistributor Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0024] Reference Figures 1 to 3 The recovery tower shown includes a tower body 10, several liquid distributors 20, a demister 30, and a heat exchange mechanism 40. The tower body 10 has an outlet 11 at the top and a waste outlet 12 at the bottom. Several structured packing sections 13 are arranged inside the tower body 10, and each structured packing section 13 has a grid plate 14 at its bottom. Several liquid distributors 20 are dispersed within the tower body 10, with adjacent liquid distributors 20 separated by the structured packing sections 13. Demisters 30 are located on top of the liquid distributors 20 and the structured packing sections 13. The heat exchange mechanism 40 includes a mounting frame 41, a coil 42, and several fixing rings 43. The mounting frame 41 is located at the bottom of the tower body 10, and the coil 42 is fixedly mounted on the mounting frame 41 by the fixing rings 43. Both ends of the coil 42 extend out of the tower body 10 and form connecting pipes 44.

[0025] The grid plate 14 serves to limit the outflow of waste liquid from the bottom of the structured packing section 13, while also suppressing foam. In this application, the demister 30 is a baffle plate demister or a wire mesh demister. In the above embodiment, the connecting pipe 44 actually includes a portion located inside the tower body 10 and a portion located outside the tower body, connected by a flange. This separate design facilitates disassembly and assembly without removing the portion located on the tower body 10 each time the heat exchange mechanism 40 is disassembled.

[0026] Furthermore, in the above embodiments, the mounting bracket 41 is actually a structure with a ring-shaped bottom and at least two fixing rods on the top, and the coil 42 is fixed to the fixing rods by fixing rings 43. At the same time, the ring-shaped structure at the bottom can be fixed to the bottom of the tower body 10.

[0027] This utility model discloses a recovery tower that incorporates a demister 30 within the existing recovery tower. This demister helps eliminate foam generated after the liquid distributor 20 distributes the liquid, facilitating the treatment of waste liquid by the structured packing section 13 and promoting the evaporation and recovery of ethanol from the waste liquid. A heat exchange mechanism 40 is installed at the bottom of the tower body 10 to ensure that the temperature of the entire waste liquid remains above the boiling point of ethanol during treatment, thus guaranteeing recovery efficiency.

[0028] See Figures 1 to 2 In one embodiment of this application, to facilitate installation, since the bottom of the tower body 10 is arc-shaped, an installation platform 16 is provided at the bottom of the tower body 10, and the mounting bracket 41 is mounted on the installation platform 16. In fact, the installation platform 16 is a platform formed by welding the bottom and side walls of the tower body 10 to both ends of multiple L-shaped plates simultaneously. This reduces the amount of waste liquid remaining on the installation platform 16, facilitating subsequent cleaning.

[0029] In one embodiment of this application, in order to facilitate the recovery of evaporated ethanol, a plurality of gas outlets 11 are also provided on the middle part of the tower body 10. The gas outlets 11 located in the middle part of the tower body 10 are located in the area of ​​the tower body 10 between the liquid distributor 20 and the structured packing section 13.

[0030] Furthermore, in one embodiment of this application, to facilitate the restriction of the packing material inside the structured packing section 13, a grid pressure plate 15 is provided on the top of the structured packing section 13, and the outer periphery of the grid pressure plate 15 is connected to the inner wall of the tower body 10. In addition, the design of the grid pressure plate 15 can, to a certain extent, form a grid defoaming structure to avoid foam accumulation.

[0031] See Figure 2 In one embodiment of this application, in order to improve the uniformity of liquid distribution, thereby ensuring effective surface for mass and heat transfer, improving interphase contact, and enhancing the efficiency and uniformity of the equipment, a redistributor 50 is provided at the bottom of the grid plate 14. The redistributor 50 can be a conventional grid plate, fine mesh, or other structure.

[0032] See Figure 3The liquid distributor 20 can be a tubular, disc, or trough-type liquid distributor. In one embodiment of this application, in order to improve the liquid distribution effect, the liquid distributor 20 includes a base 21, a liquid distribution trough 22, and an inlet pipe 23. The base 21 is installed on the inner wall of the tower body 10. The liquid distribution trough 22 is disposed on the base 21. One end of the inlet pipe 23 is connected to the liquid distribution trough 22, and the other end passes through the tower body 10. The bottom of the liquid distribution trough 22 is provided with a plurality of liquid outlet cylinders 24. The top of the liquid outlet cylinders 24 is connected to the liquid distribution trough 22. The top of the liquid outlet cylinders 24 is provided with a V-shaped liquid collecting guide plate 25. The V-shaped liquid collecting guide plate 25 is provided with a plurality of leakage holes. The lower end of the liquid outlet cylinders 24 is provided with a liquid outlet guide cylinder 26. The liquid outlet guide cylinder 26 is provided with a plurality of liquid outlet channels 27.

[0033] In the above embodiment, the liquid distribution tank 22 is a disc-shaped structure, mainly to fit the cross-section of the tower body 10. In addition, the cross-section of the liquid outlet cylinder 24 is square and its two ends fit the outer periphery of the liquid distribution tank 22. The tip of the V-shaped liquid collecting guide plate 25 protrudes outward. This design can realize two-stage liquid distribution. At the same time, several leakage holes are provided on the V-shaped liquid collecting guide plate 25. The liquid entering the V-shaped liquid collecting guide plate 25 enters the liquid outlet guide cylinder 26 through the leakage holes, which can realize three-stage liquid distribution and improve the uniformity of liquid distribution.

[0034] Furthermore, in one embodiment of this application, the liquid distribution tank 22 is provided with a plurality of overflow outlets 28. This arrangement can, to a certain extent, prevent excessive liquid from entering the liquid distribution tank 22 and ensure that it is evenly discharged outwards.

[0035] In the above embodiments, for ease of installation, a plurality of mounting legs 29 are provided on the outer periphery of the base 21, and the mounting legs 29 are mounted on mounting brackets on the inner wall of the tower body 10. Furthermore, a support plate is provided at the bottom of the base 21, and the lower ends of all the liquid outlet guide tubes 26 extend through the support plate.

[0036] It should be noted that in the above embodiment, the outer periphery of the support plate forms a ring-shaped structure, which can enhance the strength of the entire base 21 and also form a structure that can collect the liquid overflowing from the liquid distribution tank 22 to a certain extent. The liquid entering the ring-shaped structure can evaporate naturally by the temperature inside the tower body 10. In order to facilitate the discharge of the liquid entering the ring-shaped structure, the support plate is also provided with liquid outlet holes.

[0037] The above embodiments are merely preferred embodiments of this utility model and should not be construed as limiting the scope of protection of this utility model. Any non-substantial changes and substitutions made by those skilled in the art based on this utility model shall fall within the scope of protection claimed by this utility model.

Claims

1. A recycling tower, characterized in that, include The tower body has an air outlet at the top and a waste discharge outlet at the bottom. The tower body is provided with several structured packing sections, and each structured packing section is provided with a grid plate at its bottom. Several liquid distributors are dispersedly arranged in the tower body, and adjacent liquid distributors are separated by the structured packing section. A demister is installed on top of the liquid distributor and the structured packing section; The heat exchange mechanism includes a mounting bracket, a coil, and several fixing rings. The mounting bracket is located on the bottom of the tower body, and the coil is fixedly mounted on the mounting bracket by the fixing rings. Both ends of the coil extend out of the tower body and form connecting pipes.

2. A recycling tower according to claim 1, characterized in that: The bottom of the tower is provided with an installation platform, and the mounting frame is installed on the installation platform.

3. A recovery tower according to claim 1, characterized in that: Several air outlets are also provided on the middle part of the tower body. The air outlets located in the middle part of the tower body are located in the area of ​​the tower body between the liquid distributor and the structured packing section.

4. A recovery tower according to claim 1, characterized in that: A redistributor is provided at the bottom of the grid plate.

5. A recovery tower according to claim 1, characterized in that: A grid plate is provided at the top of the structured packing section, and the outer periphery of the grid plate is connected to the inner wall of the tower.

6. A recovery tower according to any one of claims 1-5, characterized in that: The liquid distributor includes a base, a liquid distribution trough, and a liquid inlet pipe. The base is installed on the inner wall of the tower body, and the liquid distribution trough is disposed on the base. One end of the liquid inlet pipe is connected to the liquid distribution trough, and the other end passes through the tower body. The bottom of the liquid distribution trough is provided with several liquid outlet cylinders, and the top of the liquid outlet cylinders is connected to the liquid distribution trough. The top of the liquid outlet cylinders is provided with a V-shaped liquid collecting guide plate, and the V-shaped liquid collecting guide plate is provided with several leakage holes. The lower end of the liquid outlet cylinders is provided with a liquid outlet guide tube, and the liquid outlet guide tube is provided with several liquid outlet channels.

7. A recovery tower according to claim 6, characterized in that: The liquid distribution tank is provided with several overflow outlets.

8. A recovery tower according to claim 6, characterized in that: The base is provided with a number of mounting legs on its outer periphery, and the mounting legs are mounted on mounting brackets on the inner wall of the tower body.

9. A recycling tower according to claim 6, characterized in that: A support plate is provided at the bottom of the base, and the lower ends of all the liquid outlet guide tubes extend through the support plate.

10. A recovery tower according to claim 1, characterized in that: The demister is a baffle plate demister or a wire mesh demister.

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