A dual-effect methanol distillation column

Abstract

This utility model discloses a double-effect methanol distillation column, specifically relating to the field of chemical equipment technology. It includes a column shell body, inside which a fixing plate is fixedly installed by welding. The fixing plate provides the mounting foundation for the column plates. A column plate is fixedly installed on one side of the fixing plate by bolts. The upper side of the column plate has uniformly distributed sieve holes. Through the feed pipe of the double-effect methanol distillation column, a spray plate is connected to the feed pipe. The uniformly distributed spray nozzles at the bottom of the spray plate allow the methanol feedstock to be sprayed into the column as fine, uniform droplets, increasing the contact area with the rising gas, promoting gas-liquid mixing, mass transfer, and heat transfer, and improving separation efficiency. The uniformly distributed sieve holes in the column plate further optimize gas-liquid contact, making separation more efficient and enabling faster acquisition of high-purity methanol. The improved separation efficiency reduces distillation time and reflux ratio, lowering energy consumption. Simultaneously, the structural layout ensures smooth material and gas flow, reducing additional energy consumption, saving energy and reducing costs.

Description

Technical Field

[0001] This utility model relates to the field of chemical equipment technology, and more specifically, to a double-effect methanol distillation tower. Background Technology

[0002] Methanol, as an important organic chemical raw material and clean fuel, has a wide range of applications in many fields such as chemical industry, medicine, and energy. In the production process of methanol, distillation is the key step to improve the purity of methanol.

[0003] A search revealed that patent publication number CN222677198U discloses a methanol distillation column, comprising several cylinders connected end-to-end in sequence. Connecting and fixing components are correspondingly provided on the outer walls of adjacent cylinders. The connecting component is located at the lower end of the side wall of the upper cylinder, and the fixing component is located at the upper end of the side wall of the lower cylinder. The fixing component is equipped with a fixing contact component. This provides a methanol distillation column that facilitates the removal and cleaning of the distributor inside the cylinder. During the development of this invention, the inventors discovered the following problems with the existing technology:

[0004] The gas-liquid contact method inside the distillation column is not optimized. Due to the uneven distribution and flow of materials in the column, the heat transfer effect between the gas and liquid phases is poor, making it difficult to achieve the ideal separation effect in the distillation process and meet the production requirements of high-purity methanol products. At the same time, due to the low separation efficiency, in order to achieve the required separation accuracy, it is often necessary to extend the distillation time or increase the reflux ratio, which leads to a large amount of energy consumption. High energy consumption not only increases the production cost of enterprises but also reduces economic benefits.

[0005] Therefore, a dual-effect methanol distillation column is proposed to address the above problems. Utility Model Content

[0006] In order to overcome the above-mentioned defects of the prior art, the present invention provides a double-effect methanol distillation column to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a double-effect methanol distillation column, comprising a column shell body, a fixing plate fixedly installed inside the column shell body by welding, the fixing plate providing an installation base for the column plates, a column plate fixedly installed on one side of the fixing plate by bolt connection, sieve holes evenly opened on the upper side of the column plate, a feed pipe fixedly connected to one side of the column shell body by flange, a gas outlet fixedly welded to the top of the column shell body for discharging high-purity methanol gas obtained after distillation, a discharge pipe connected to the bottom of the column shell body by means of a discharge pipe, a valve movably installed on one side of the discharge pipe, the discharge of residual liquid at the bottom of the column can be controlled by operating the valve, a collection box placed directly below the column shell body for collecting the residual liquid discharged from the discharge pipe, a filter screen opening opened on the front side of the collection box, guide grooves fixedly installed on both sides of the inside of the filter screen opening by welding, a filter screen movably installed inside the filter screen opening, the size of the filter screen matching the guide grooves, and the filter screen being positioned along the guide grooves.

[0008] Preferably, a conveying pipe is inserted inside the feed pipe, the conveying pipe passes through the feed pipe at an appropriate position, and the end of the conveying pipe extends into the internal space of the tower shell body. One end of the conveying pipe is tightly connected to a spraying plate, and multiple spraying nozzles are evenly distributed at the bottom of the spraying plate.

[0009] Preferably, a gas inlet is fixedly connected to one side of the tower shell body by welding, and the gas inlet is located directly below the feed pipe.

[0010] Preferably, the feed inlet of the collection box is installed directly below the discharge pipe.

[0011] Preferably, a discharge pipe is fixedly connected to one side of the collection box by welding. The discharge pipe passes through the body of the collection box at a suitable angle and extends steadily into the internal space of the collection box. A baffle plate is movably installed above the discharge pipe.

[0012] Preferably, a positioning frame is tightly and securely fitted on the outer side of the tower shell body, the size of the positioning frame is perfectly matched with the tower shell body, and a support frame is fixedly installed at the bottom of the positioning frame by welding or other secure methods.

[0013] Preferably, an inclined plate is fixedly installed inside the collection box by welding.

[0014] The technical effects and advantages of this utility model are as follows:

[0015] Compared with existing technologies, this double-effect methanol distillation column, through the insertion of a feed pipe into the feed pipe and connection to a spray plate, with spray nozzles of appropriate size and spacing evenly distributed at the bottom of the spray plate, allows the methanol feedstock to be sprayed into the column in a more uniform and fine droplet form. This greatly increases the contact area with the rising gas, promotes thorough mixing and mass and heat transfer between the gas and liquid phases, and significantly improves the separation efficiency during the distillation process. At the same time, the uniformly opened sieve holes on the column plate further optimize the gas-liquid contact effect, making the separation operation more efficient and enabling the faster acquisition of high-purity methanol products to meet the market demand for high-quality methanol.

[0016] Compared with existing technologies, this dual-effect methanol distillation column reduces energy consumption: due to the improved separation efficiency, the required distillation time and reflux ratio are significantly reduced to achieve the same separation accuracy. This means that auxiliary equipment such as compressors and reboilers do not need to consume excessive energy to maintain system operation, effectively reducing the energy consumption of the entire distillation process. Furthermore, the rationally designed gas inlet and feed pipe positions on the column shell, as well as the precise installation of the feed inlet of the collection box directly below the discharge pipe, ensure smoother flow of materials and gases inside and outside the column, reducing additional energy losses caused by poor flow. This further achieves the goal of energy conservation and emission reduction, aligning with the current industrial development trend of energy conservation and emission reduction, reducing production costs and improving economic efficiency for enterprises. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model.

[0018] Figure 2 This is a schematic diagram of the internal structure of this utility model.

[0019] Figure 3 This is a top view of the internal structure of this utility model.

[0020] Figure 4 This is a schematic diagram of the internal structure of the material collection box of this utility model.

[0021] The attached diagram is labeled as follows: 1. Tower shell body; 2. Fixing plate; 3. Tower plate; 4. Sieve hole; 5. Feed pipe; 6. Conveying pipe; 7. Spray plate; 8. Spray nozzle; 9. Gas inlet; 10. Gas outlet; 11. Discharge pipe; 12. Valve; 13. Collection box; 14. Filter screen opening; 15. Guide groove; 16. Filter screen; 17. Discharge pipe; 18. Baffle plate; 19. Positioning frame; 20. Support frame; 21. Inclined plate. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] Example 1

[0024] As attached Figures 1 to 4 The illustrated double-effect methanol distillation column includes a column shell body 1. A fixing plate 2 is fixedly installed inside the column shell body 1 by welding, providing a mounting base for column plates 3. A column plate 3 is fixedly installed on one side of the fixing plate 2 by bolts. Screen holes 4 are evenly distributed on the upper side of the column plate 3. A feed pipe 5 is fixedly connected to one side of the column shell body 1 by a flange. A gas outlet 10 is welded to the top of the column shell body 1 for discharging the high-purity methanol gas obtained after distillation. A discharge pipe 1 is connected to the bottom of the column shell body 1 by means of welding. 1. A valve 12 is movably installed on one side of the feed pipe 11. The discharge of residual liquid at the bottom of the tower can be controlled by operating the valve 12. A collection box 13 is placed directly below the tower shell body 1 to collect the residual liquid discharged from the feed pipe 11. A filter screen opening 14 is opened on the front side of the collection box 13. Guide grooves 15 are fixedly installed on both sides of the inside of the filter screen opening 14 by welding. A filter screen 16 is movably installed inside the filter screen opening 14. The size of the filter screen 16 matches the guide groove 15. The filter screen 16 is positioned along the guide groove 15 and can be easily inserted and removed.

[0025] The column shell 1 serves as the core structure, with the fixing plate 2 fixedly installed by welding, providing a stable installation foundation for the column tray 3. This connection method offers high strength and good sealing, effectively preventing material leakage caused by loose connections and ensuring stable operation of the distillation process. The fixing plate 2 and column tray 3 are connected by bolts, facilitating subsequent disassembly, maintenance, and replacement of the column tray 3, reducing maintenance and time costs. The evenly spaced sieve holes 4 on the column tray 3 optimize the contact and mass and heat transfer effects between the gas and liquid phases, contributing to improved methanol distillation efficiency and product quality. The feed pipe 5 is fixedly connected to one side of the column shell 1 via a flange. The flange connection is characterized by convenient disassembly and reliable sealing, facilitating adjustment of the feed pipe 5 or maintenance according to production needs. The gas outlet 10, welded and fixed at the top, ensures the smooth discharge of high-purity methanol gas after distillation. The welding process guarantees the strength and sealing of the connection. The feed pipe 11 connected at the bottom works in conjunction with the movable valve 12 to precisely control the discharge of residual liquid at the bottom of the column, preventing the accumulation of residual liquid in the column from affecting the distillation effect. The collection box 13 placed directly below collects the residual liquid. The filter screen opening 14 on its front, the guide groove 15 welded inside, and the matching filter screen 16 facilitate the filtration of impurities in the residual liquid. The filter screen 16 can be easily inserted and removed along the guide groove 15 for easy cleaning and replacement, further ensuring the quality of the collected residual liquid and extending the service life of the equipment.

[0026] Example 2

[0027] Based on Embodiment 1, the solution in Embodiment 1 will be further described in detail below with reference to the specific working method, such as... Figures 1 to 4 As shown below, see details:

[0028] In a preferred embodiment, a feed pipe 6 is inserted into the feed pipe 5. The feed pipe 6 passes through the feed pipe 5 at an appropriate position, and the end of the feed pipe 6 extends into the internal space of the tower shell body 1. One end of the feed pipe 6 is tightly connected to a spray plate 7. Multiple spray nozzles 8 are evenly distributed at the bottom of the spray plate 7. The size and spacing of the spray nozzles 8 are appropriate, which can ensure that the methanol feedstock is sprayed out in a uniform and fine mist form, which is conducive to better dispersion of the feedstock in the tower and full contact with the rising steam, thereby improving the subsequent distillation and separation effect.

[0029] In a preferred embodiment, a gas inlet 9 is fixedly connected to one side of the tower shell body 1 by welding. The gas inlet 9 is located directly below the feed pipe 5, so that the gas entering the tower from the gas inlet 9 can meet the methanol feedstock sprayed down from the feed pipe 5 through the spray plate 7 in a similar area, which greatly increases the chance of gas-liquid contact and creates favorable conditions for the subsequent full mass and heat transfer process between gas and liquid, which helps to improve the distillation efficiency.

[0030] In a preferred embodiment, the inlet of the collection bin 13 is installed directly below the discharge pipe 11, ensuring that the material flowing out of the discharge pipe 11 falls accurately into the collection bin 13, preventing material from spilling outside and causing waste or affecting the production environment. At the same time, this layout optimizes the material collection process, making material transport smoother and more efficient, and improving the continuity and stability of the entire production process.

[0031] In a preferred embodiment, a discharge pipe 17 is fixedly connected to one side of the collection box 13 by welding. The discharge pipe 17 penetrates the body of the collection box 13 at a suitable angle and extends steadily into the internal space of the collection box 13. A baffle plate 18 is movably installed above the discharge pipe 17 and can move flexibly. To accurately control the discharge, the opening and closing of the discharge pipe 17 and the discharge flow rate can be controlled by adjusting its position, ensuring that the discharge process proceeds in an orderly manner.

[0032] In a preferred embodiment, a positioning frame 19 is tightly and securely fitted onto the outside of the column shell 1. The dimensions of the positioning frame 19 are perfectly matched to the column shell 1. A support frame 20 is fixedly installed at the bottom of the positioning frame 19 by welding or other secure methods. This accurately fixes the position of the column shell 1, preventing it from shifting or shaking. The support frame 20 has a robust structure, is made of high-strength materials, and can effectively bear the weight of the column shell 1 and its internal materials, providing stable and reliable support for the entire distillation column.

[0033] In a preferred embodiment, an inclined plate 21 is fixedly installed inside the collection box 13 by welding. The inclined plate 21 is set at a specific inclination angle and has a smooth and flat surface, which can effectively guide the material falling from the feed port to slide along the inclined direction, which can accelerate the flow speed of the material in the collection box 13, avoid the local accumulation of material in the box, and allow the material to more smoothly converge to the vicinity of the discharge pipe 17, thereby improving the discharge efficiency.

[0034] The working process of this utility model is as follows: When in use, first, install the double-effect methanol distillation column in a suitable position, ensuring that the positioning frame 19 is tightly and securely fitted on the outside of the column shell body 1 and the support frame 20 is firmly fixed to provide stable support for the operation of the equipment. At the same time, place the collection box 13 directly below the column shell body 1 and adjust its position so that the inlet of the collection box 13 is exactly below the discharge pipe 11.

[0035] Then, the methanol feedstock is transported to the spray plate 7 through the feed pipe 6. Since the end of the feed pipe 6 extends into the interior of the tower shell 1, and multiple spray nozzles 8 of appropriate size and spacing are evenly distributed at the bottom of the spray plate 7, the feedstock will be evenly sprayed into the interior of the tower shell 1 in the form of fine droplets. Next, gas is introduced into the tower shell 1 from the gas inlet 9. The gas inlet 9 is located directly below the feed pipe 5, which helps the gas and liquid phases to fully contact each other in the tower.

[0036] Next, within the tower shell 1, the gas and liquid phases undergo mass and heat transfer on the tower plate 3. The uniformly distributed sieve holes 4 on the tower plate 3 promote gas-liquid flow and mass transfer. High-purity methanol gas rises to the top of the tower and is discharged from the gas outlet 10. The bottom residue is discharged through the feed pipe 11 and enters the collection box 13. The inclined plate 21 inside the collection box 13 helps the residue flow quickly. Then, the residue is filtered by the filter screen 16 in the collection box 13. The filter screen 16 is positioned and installed using the guide grooves 15 on both sides of the filter screen opening 14, which can be easily inserted and removed to remove impurities in the residue. When it is necessary to discharge the treated residue in the collection box 13, the baffle plate 18 is moved flexibly to discharge the residue through the discharge pipe 17.

Claims

1. A double-effect methanol rectification column comprising a column shell body (1), characterized in that: A fixing plate (2) is fixedly installed inside the tower shell body (1) by welding. The fixing plate (2) provides the mounting base for the tower plate (3). The tower plate (3) is fixedly installed on one side of the fixing plate (2) by bolt connection. The upper side of the tower plate (3) is evenly provided with sieve holes (4). A feed pipe (5) is fixedly connected to one side of the tower shell body (1) by flange. A gas outlet (10) is welded and fixed to the top of the tower shell body (1) for discharging the high-purity methanol gas obtained after distillation. A feed pipe (11) is connected to the bottom of the tower shell body (1) by means of welding. A valve (12) is movably installed on one side of the tower shell (1). The discharge of residual liquid at the bottom of the tower can be controlled by operating the valve (12). A collection box (13) is placed directly below the tower shell body (1) to collect the residual liquid discharged from the feed pipe (11). A filter screen opening (14) is opened on the front side of the collection box (13). Guide grooves (15) are fixedly installed on both sides of the inside of the filter screen opening (14) by welding. A filter screen (16) is movably installed inside the filter screen opening (14). The size of the filter screen (16) matches the guide groove (15). The filter screen (16) is positioned along the guide groove (15).

2. A double-effect methanol rectification column according to claim 1, characterized in that: The feed pipe (5) is inserted into the feed pipe (6), the feed pipe (6) penetrates the feed pipe (5) at an appropriate position, and the end of the feed pipe (6) extends into the internal space of the tower shell body (1). One end of the feed pipe (6) is tightly connected to the spray plate (7), and multiple spray nozzles (8) are evenly distributed at the bottom of the spray plate (7).

3. A double-effect methanol rectification column according to claim 2, characterized in that: The gas inlet (9) is fixedly connected to one side of the tower shell body (1) by welding. The gas inlet (9) is located directly below the feed pipe (5).

4. A double-effect methanol rectification column according to claim 2, characterized in that: The feed inlet of the collection box (13) is installed so that it is located directly below the feed pipe (11).

5. A double-effect methanol rectification column according to claim 4, characterized in that: The discharge pipe (17) is fixedly connected to one side of the collection box (13) by welding. The discharge pipe (17) penetrates the box body of the collection box (13) at a suitable angle and extends steadily into the internal space of the collection box (13). A baffle plate (18) is movably installed above the discharge pipe (17). The baffle plate (18) is movable.

6. A double-effect methanol rectification column according to claim 4, characterized in that: The outer side of the tower shell body (1) is tightly and securely fitted with a positioning frame (19). The size of the positioning frame (19) is perfectly matched with the tower shell body (1). The bottom of the positioning frame (19) is fixedly installed with a support frame (20) by welding or other secure methods.

7. A double-effect methanol rectification column according to claim 4, characterized in that: An inclined plate (21) is fixedly installed inside the collection box (13) by welding.

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