Multi-section variable-diameter methanol removal distillation tower
By designing a multi-stage variable-diameter methanol removal distillation tower, efficient separation and purification of methanol are achieved, solving the problems of low separation efficiency, high energy consumption and high equipment corrosion risk in existing technologies, and simplifying the treatment process of waste gas, wastewater, and solid waste.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GUANGXI QINCHAOXI BREWING CO LTD
- Filing Date
- 2025-05-20
- Publication Date
- 2026-05-01
AI Technical Summary
Existing methanol distillation towers suffer from problems such as low separation efficiency, high energy consumption, poor impurity retention, high risk of equipment corrosion, and complex treatment of waste during methanol purification.
A multi-stage variable-diameter methanol removal distillation tower is adopted, which achieves liquid-gas separation through separation components, uses a fan to circulate and recover uncondensed methanol vapor, and is equipped with anti-slag components to intercept mechanical impurities and high-boiling-point pollutants, thereby reducing energy consumption and improving methanol purity.
It improves the separation efficiency and purity of methanol, reduces energy consumption and equipment corrosion risk, simplifies the treatment process of waste gas, wastewater, and solid waste, and reduces methanol loss and pollutant emissions.
Smart Images
Figure CN224180265U_ABST
Abstract
Description
A multi-stage variable diameter methanol removal distillation tower Technical Field
[0001] This utility model relates to the field of methanol distillation tower technology, and in particular to a multi-stage variable diameter methanol removal distillation tower. Background Technology
[0002] Methanol is colorless, transparent, flammable, and toxic. It is an important organic chemical raw material and a high-quality fuel. Industrial methanol has a wide range of applications. Besides being a good solvent for many organic compounds, it is mainly used in the industrial production of synthetic fibers, formaldehyde, plastics, pharmaceuticals, pesticides, dyes, and synthetic proteins, making it a fundamental organic chemical raw material. In the production of monochloropinazone, crude methanol is obtained after solvent removal. This crude methanol contains a large amount of water, a small amount of hydrogen chloride, and organic impurities. Further purification is needed to remove water and impurities to obtain refined methanol for reuse.
[0003] Existing methanol distillation towers have several shortcomings in methanol purification. Firstly, separation efficiency needs improvement; the cooled exhaust gas often contains uncondensed methanol vapor or tiny droplets, leading to methanol loss if directly discharged. Secondly, energy consumption is high; the heat carried in the exhaust gas is not effectively recovered, resulting in a heavy heating load on the reboiler. Furthermore, existing devices are ineffective at retaining mechanical impurities, high-boiling-point contaminants, or moisture in the recovered methanol, affecting methanol purity. If the impurities contain corrosive or flammable / explosive components, it increases equipment corrosion rates and the risk of explosion. Simultaneously, the high concentration of pollutants in the exhaust gas and residue complicates the waste treatment process. Therefore, we propose a multi-stage variable-diameter methanol removal distillation tower to address these issues. Summary of the Invention
[0004] The main purpose of this invention is to provide a multi-stage variable diameter methanol removal distillation tower, which can effectively solve the problems of separation and purification.
[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:
[0006] A multi-stage variable-diameter methanol removal distillation tower includes a support assembly, a distillation assembly fixedly connected to the inner cavity of the support assembly, a cooling assembly fixedly connected to the upper part of the distillation assembly, a separation assembly fixedly connected to the left side of the cooling assembly, an anti-slag assembly fixedly connected to the lower part of the separation assembly, and a heating assembly fixedly connected to the right side of the support assembly.
[0007] Preferably, the support assembly includes a frame, and a connecting plate is fixedly connected to the front and rear sidewalls of the inner cavity of the frame, and a support plate is fixedly connected to the upper end of the connecting plate.
[0008] Preferably, the distillation assembly includes a distillation column, the lower end of which is fixedly connected to the left side of the bottom wall of the inner cavity of the frame, three circular plates are fixedly connected to the inner surface of the distillation column, and an overflow plate is fixedly connected to one end of each of the three circular plates with a notch, and an inlet pipe is fixedly connected to the upper part of the outer surface of the distillation column.
[0009] Preferably, the cooling assembly includes an air inlet pipe, the lower end of which is fixedly connected to the upper end of the distillation column, a cooler fixedly connected to the right end of the air inlet pipe, and a drain pipe fixedly connected to the right end of the cooler.
[0010] Preferably, the separation assembly includes a separation shell, the middle right end of which is fixedly connected to the lower left end of the drain pipe, and an exhaust pipe is fixedly connected to the upper left end of the separation shell. Several fixing blocks are fixedly connected to the inner surface of the exhaust pipe, and the ends of the fixing blocks near the center are rotatably connected to a fan.
[0011] Preferably, the anti-slag component includes a shell, the upper end of which is fixedly connected to the middle of the lower end of the separation shell via a pipe, a second drain pipe is fixedly connected to the lower right end of the shell, a motor is fixedly connected to the left front end of the shell, two shafts are rotatably connected to the front and rear side walls of the inner cavity of the shell, belts are wound around the front and rear of the outer surfaces of the two shafts, several scrapers are fixedly connected to the upper and lower ends of the two belts, pulleys are fixedly connected to the rear ends of the two scrapers, and belts are wound around the outer surfaces of the two pulleys.
[0012] Preferably, the heating assembly includes a reboiler, the lower end of which is fixedly connected to the bottom wall of the inner cavity of the frame, the upper end of which is fixedly connected to a vent pipe, and the left end of which is fixedly connected to the lower part of the outer surface of the distillation column through a pipe.
[0013] Preferably, the inner surface of the support plate is fixedly connected to the lower part of the outer surface of the cooler, the motor output end is fixedly connected to the front end of the shaft located on the left through the shaft, and the upper end of the vent pipe is fixedly connected to the lower part of the outer surface of the exhaust pipe.
[0014] Compared with the prior art, the present invention has the following beneficial effects:
[0015] 1. This utility model can achieve methanol liquid and gas separation through the separation component. The cooled exhaust gas may still contain uncondensed methanol vapor or tiny droplets, which can be blown back into the distillation tower by a fan, allowing them to re-participate in the gas-liquid mass transfer process for further separation and recovery, reducing the loss of methanol by direct emission with the exhaust gas. At the same time, the heat carried by the exhaust gas is returned to the tower with the airflow, which can partially replace the heating load of the reboiler, reducing the overall energy consumption. Liquid-gas separation is achieved through fan circulation, which can replace some traditional tail gas treatment equipment, simplify the process flow, and reduce equipment investment and floor space.
[0016] 2. This utility model can improve the purity of recovered methanol by setting anti-slag components. By setting a filter device in the recovery section, mechanical impurities, high-boiling-point pollutants or water can be effectively intercepted to prevent them from entering the recovery end with the methanol liquid, thus ensuring the purity of methanol. At the same time, if the impurities contain corrosive components or flammable and explosive components, separation treatment can reduce the corrosion rate of equipment and the risk of explosion, while reducing the concentration of pollutants in waste gas and waste residue and simplifying the three wastes treatment process. Attached Figure Description
[0017] Figure 1 is a schematic diagram of the overall structure of this utility model;
[0018] Figure 2 is a schematic diagram of the overall structure of this utility model from another perspective;
[0019] Figure 3 is a partial cross-sectional view of the present invention;
[0020] Figure 4 is a partial structural cross-sectional view of this utility model from another perspective;
[0021] Figure 5 is an enlarged schematic diagram of point A in Figure 3 of this utility model;
[0022] Figure 6 is an enlarged schematic diagram of section B in Figure 4 of this utility model.
[0023] In the diagram: 1. Support assembly; 11. Frame; 12. Connecting plate; 13. Support plate; 2. Distillation assembly; 21. Distillation column; 22. Circular plate; 23. Overflow plate; 24. Liquid inlet pipe; 3. Cooling assembly; 31. Gas inlet pipe; 32. Cooler; 33. Drain pipe one; 4. Separation assembly; 41. Separation shell; 42. Exhaust pipe; 43. Fixing block; 44. Fan; 5. Slag prevention assembly; 51. Outer shell; 52. Drain pipe two; 53. Motor; 54. Shaft; 55. Belt one; 56. Scraper; 57. Pulley one; 58. Belt two; 6. Heating assembly; 61. Reboiler; 62. Vent pipe. Detailed Implementation
[0024] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.
[0025] Example 1, as shown in Figure 1, a multi-stage variable-diameter methanol removal distillation tower includes a support assembly 1, a distillation assembly 2 fixedly connected to the inner cavity of the support assembly 1, a cooling assembly 3 fixedly connected to the upper part of the distillation assembly 2, a separation assembly 4 fixedly connected to the left side of the cooling assembly 3, an anti-slag assembly 5 fixedly connected to the lower part of the separation assembly 4, and a heating assembly 6 fixedly connected to the right side of the support assembly 1.
[0026] In implementation, the operator first adds liquid to distillation assembly 2, then activates heating assembly 6 to heat the liquid, causing methanol to vaporize and rise. This allows the gas to travel from separation assembly 4 to distillation assembly 2, where it then reaches cooling assembly 3, where it cools and liquefies the methanol. The liquid methanol and waste gas then return to separation assembly 4, where the liquid methanol flows to anti-slag assembly 5, while the waste gas returns to distillation assembly 2. This process achieves multiple separations and recoverys, increasing the amount of methanol recovered and reducing the procedures required for waste gas emissions.
[0027] Simultaneously, when liquid methanol reaches the anti-slag component 5, the operator activates the anti-slag component 5 to scrape the liquid methanol. As a result, the liquid methanol will fall to the bottom of the anti-slag component 5 and be discharged. Meanwhile, the impurities that fall to the anti-slag component 5 along with the liquid methanol will be scraped away from the outside by the anti-slag component 5, thereby further ensuring the purity of the methanol and preventing impurities from contaminating the methanol.
[0028] Specifically, in order to separate the cooled liquid and gas, as shown in Figure 2, in this scheme, the support component 1 includes a frame 11, the front and rear side walls of the inner cavity of the frame 11 are fixedly connected to a connecting plate 12, and the upper end of the connecting plate 12 is fixedly connected to a support plate 13.
[0029] Furthermore, referring to Figure 3, the distillation assembly 2 includes a distillation column 21. The lower end of the distillation column 21 is fixedly connected to the left side of the bottom wall of the inner cavity of the frame 11. Three circular plates 22 are fixedly connected to the inner surface of the distillation column 21. An overflow plate 23 is fixedly connected to one end of each of the three circular plates 22 with a notch. An inlet pipe 24 is fixedly connected to the upper part of the outer surface of the distillation column 21.
[0030] Furthermore, referring to Figure 2, the cooling assembly 3 includes an air inlet pipe 31, the lower end of which is fixedly connected to the upper end of the distillation column 21, and a cooler 32 is fixedly connected to the right end of the air inlet pipe 31. A drain pipe 33 is fixedly connected to the right end of the cooler 32.
[0031] Furthermore, referring to Figures 3 and 5, the separation component 4 includes a separation shell 41. The middle right end of the separation shell 41 is fixedly connected to the lower left end of the drain pipe 33. An exhaust pipe 42 is fixedly connected to the upper left end of the separation shell 41. Several fixing blocks 43 are fixedly connected to the inner surface of the exhaust pipe 42. The ends of the several fixing blocks 43 near the center are rotatably connected to a fan 44.
[0032] Furthermore, referring to Figure 4, the heating assembly 6 includes a reboiler 61, the lower end of which is fixedly connected to the bottom wall of the inner cavity of the frame 11, the upper end of which is fixedly connected to a vent pipe 62, and the left end of which is fixedly connected to the lower part of the outer surface of the distillation column 21 through a pipe.
[0033] Furthermore, referring to Figures 2 and 4, the inner surface of the support plate 13 is fixedly connected to the lower part of the outer surface of the cooler 32, and the upper end of the vent pipe 62 is fixedly connected to the lower part of the outer surface of the exhaust pipe 42.
[0034] In the implementation of this scheme, the operator first adds liquid into the distillation column 21 through the liquid inlet pipe 24. The liquid then falls from the top to the bottom and reaches the reboiler 61. The operator then starts the reboiler 61 to heat the liquid, causing the methanol to vaporize and rise. This allows the gas to reach the exhaust pipe 42 through the gas vent pipe 62, and then from the exhaust pipe 42 to the upper part of the distillation column 21. At the same time, the liquid in the upper part of the distillation column 21 will have its gas flow rate increased when it passes through the conical shape at the top of the distillation column 21 and enters the gas inlet pipe 31.
[0035] The gas then flows from the inlet pipe 31 into the cooler 32, where it is cooled and liquefied. The liquid methanol and waste gas then pass through the drain pipe 33 into the separation shell 41. The liquid methanol then flows from the separation shell 41 into the outer shell 51, while the waste gas is absorbed by the fan 44 and blown back into the distillation tower 21. This process achieves multiple separations and recoverys, increasing the amount of methanol recovered and reducing the procedures required for waste gas discharge.
[0036] Example 2, based on Example 1, further purifies methanol.
[0037] Specifically, in order to further purify methanol, as shown in Figures 4 and 5, in this scheme, the anti-slag component 5 includes a shell 51. The upper end of the shell 51 is fixedly connected to the lower middle part of the separation shell 41 through a pipe. A second drain pipe 52 is fixedly connected to the lower right end of the shell 51. A motor 53 is fixedly connected to the left front end of the shell 51. Two shafts 54 are rotatably connected to the front and rear side walls of the inner cavity of the shell 51. Belts 55 are wound around the front and rear parts of the outer surfaces of the two shafts 54. Several scrapers 56 are fixedly connected to the upper and lower ends of the two belts 55. Pulleys 57 are fixedly connected to the rear ends of the two scrapers 56. Belts 58 are wound around the outer surfaces of the two pulleys 57.
[0038] When this solution is implemented, as liquid methanol enters the outer casing 51, the operator starts the motor 53 to drive the shaft 54, belt 55, scraper 56, pulley 57, and belt 58 to rotate. This causes the scraper 56 to scrape the liquid methanol and move it at an angle. During this process, the liquid methanol will fall to the lower part of the outer casing 51, while impurities that fall to the outer casing 51 along with the liquid methanol will be scraped away by the scraper 56 to the outside, thereby further ensuring the purity of the methanol and preventing impurities from contaminating it.
[0039] In summary, the implementation process of this utility model is as follows:
[0040] The operator first adds liquid into the distillation column 21 through the liquid inlet pipe 24. The liquid then falls from the top to the bottom and reaches the reboiler 61. The operator then starts the reboiler 61 to heat the liquid, causing the methanol to vaporize and rise. This allows the gas to reach the exhaust pipe 42 through the gas vent pipe 62, and then from the exhaust pipe 42 to the upper part of the distillation column 21. At the same time, the liquid in the upper part of the distillation column 21 experiences a faster gas flow rate as it passes through the conical shape at the top of the distillation column 21 and enters the gas inlet pipe 31.
[0041] The gas then flows from the inlet pipe 31 into the cooler 32, where it is cooled and liquefied. The liquid methanol and exhaust gas then pass through the drain pipe 33 into the separation shell 41. The liquid methanol then flows from the separation shell 41 into the outer shell 51, while the exhaust gas is absorbed by the fan 44 and then blown back into the distillation tower 21. This process achieves multiple separations and recoverys, which increases the amount of methanol recovered and reduces the procedures required for exhaust gas discharge.
[0042] Simultaneously, when liquid methanol reaches the outer casing 51, the operator starts the motor 53 to drive the shaft 54, belt 55, scraper 56, pulley 57, and belt 58 to rotate. This causes the scraper 56 to scrape the liquid methanol and move it at an angle. During this process, the liquid methanol will fall to the lower part of the outer casing 51, while impurities that fall to the outer casing 51 along with the liquid methanol will be scraped away by the scraper 56 to the outside, thereby further ensuring the purity of the methanol and preventing impurities from contaminating it.
[0043] It should be noted that the specific installation methods, circuit connection methods, and control methods of the motor 53, reboiler 61, cooler 32, and fan 44 used in this utility model are all conventional designs, and will not be described in detail in this utility model.
[0044] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. A multi-stage variable-diameter methanol removal distillation tower, comprising a support assembly (1), characterized in that: The inner cavity of the support component (1) is fixedly connected to the distillation component (2), the upper part of the distillation component (2) is fixedly connected to the cooling component (3), the left part of the cooling component (3) is fixedly connected to the separation component (4), the lower part of the separation component (4) is fixedly connected to the anti-slag component (5), and the right part of the support component (1) is fixedly connected to the heating component (6).
2. The multi-section variable diameter methanol removal distillation column of claim 1, wherein: The support assembly (1) includes a frame (11), and a connecting plate (12) is fixedly connected to the front and rear side walls of the inner cavity of the frame (11), and a support plate (13) is fixedly connected to the upper end of the connecting plate (12).
3. The multi-stage variable-diameter methanol removal distillation tower according to claim 2, characterized in that: The distillation assembly (2) includes a distillation column (21). The lower end of the distillation column (21) is fixedly connected to the left side of the bottom wall of the inner cavity of the frame (11). Three circular plates (22) are fixedly connected to the inner surface of the distillation column (21). An overflow plate (23) is fixedly connected to one end of each of the three circular plates (22) with a notch. An inlet pipe (24) is fixedly connected to the upper part of the outer surface of the distillation column (21).
4. The multi-section variable diameter methanol removal distillation column of claim 3, wherein: The cooling assembly (3) includes an air inlet pipe (31), the lower end of which is fixedly connected to the upper end of the distillation column (21), and a cooler (32) is fixedly connected to the right end of the air inlet pipe (31). A drain pipe (33) is fixedly connected to the right end of the cooler (32).
5. The multi-section variable diameter methanol removal distillation column of claim 4, wherein: The separation assembly (4) includes a separation shell (41), the middle right end of the separation shell (41) is fixedly connected to the lower left end of the drain pipe (33), and an exhaust pipe (42) is fixedly connected to the upper left end of the separation shell (41). Several fixing blocks (43) are fixedly connected to the inner surface of the exhaust pipe (42), and the ends of the several fixing blocks (43) near the center are rotatably connected to a fan (44).
6. A multi-stage variable-diameter methanol removal distillation tower according to claim 5, characterized in that: The anti-slag component (5) includes a shell (51). The upper end of the shell (51) is fixedly connected to the middle of the lower end of the separation shell (41) through a pipe. A second drain pipe (52) is fixedly connected to the lower right end of the shell (51). A motor (53) is fixedly connected to the left front end of the shell (51). Two shafts (54) are rotatably connected to the front and rear side walls of the inner cavity of the shell (51). A belt (55) is wound around the front and rear of the two shafts (54). Several scrapers (56) are fixedly connected to the upper and lower ends of the two belts (55). A pulley (57) is fixedly connected to the rear end of the two scrapers (56). A belt (58) is wound around the outer surface of the two pulleys (57).
7. A multi-stage variable-diameter methanol removal distillation tower according to claim 6, characterized in that: The heating assembly (6) includes a reboiler (61), the lower end of which is fixedly connected to the bottom wall of the inner cavity of the frame (11), the upper end of which is fixedly connected to a vent pipe (62), and the left end of which is fixedly connected to the lower part of the outer surface of the distillation column (21) through a pipe.
8. The multi-section variable diameter methanol removal distillation column of claim 7, wherein: The inner surface of the support plate (13) is fixedly connected to the lower part of the outer surface of the cooler (32), the output end of the motor (53) is fixedly connected to the front end of the shaft (54) located on the left through the shaft, and the upper end of the vent pipe (62) is fixedly connected to the lower part of the outer surface of the exhaust pipe (42).