Rectifying tower for producing hydrogen from methanol

Abstract

The rectifying tower comprises a tower body, a gas outlet pipe is arranged on the top face of the tower body, a discharging pipe is arranged on the bottom face of the tower body, a feeding pipe is arranged in the middle of the side face of the tower body, and a plurality of tower plates distributed at equal intervals are fixed in the tower body in a suspended mode. The end face of each tower plate is eccentrically and fixedly sleeved with a liquid inlet pipe, two overflow weirs are symmetrically fixed to the top face of each tower plate, a plurality of sleeves distributed in an array mode are arranged between the two overflow weirs, the top face of each sleeve is connected with a floating plate in a sliding mode, and an ejection piece is arranged in each sleeve. According to the utility model, the ejection piece consisting of the plurality of fanning strips and the supporting plate is arranged in the sleeve, upward assistance is provided for upward floating of the floating plate, the floating plate is prevented from being clamped on the top surface of the sleeve, the floating plate cannot float smoothly, the sleeve is in threaded connection with the tower plate, and the floating plate is in sliding connection with the top surface of the sleeve through the hollow plate and the limiting piece, so that the floating plate can float smoothly. And the damaged floating plate can be conveniently detached and replaced.

Description

Technical Field

[0001] This utility model relates to the field of methanol-to-hydrogen technology, and in particular to a distillation column for methanol-to-hydrogen production. Background Technology

[0002] Methanol-to-hydrogen is an important chemical process that mainly produces hydrogen through the decomposition or reforming of methanol. When using methanol to produce hydrogen, it is usually done in a distillation column.

[0003] A distillation column is a tower-type gas-liquid contact device used for distillation. It utilizes the different volatility of the components in a mixture—that is, the different vapor pressures of the components at the same temperature—to transfer lighter components (low-boiling substances) from the liquid phase to the gas phase, while heavier components (high-boiling substances) from the gas phase transfer to the liquid phase, thus achieving separation. Distillation columns are also a widely used mass and heat transfer device in petrochemical production.

[0004] Distillation columns are mainly divided into two types: plate columns and packed columns. Among the plate columns, the valve-fed column is commonly used. The working principle of the valve-fed column is that there are many holes on the tray, and each hole is equipped with a valve. When there is no rising vapor phase, the valve is closed on the plate. When there is rising vapor phase, the valve is impacted by the vapor flow and opens upward. The opening degree increases with the amount of vapor phase. The rising vapor phase passes through the valve hole and is dispersed horizontally under the action of the valve plate. It bubbles out through the liquid layer, so that the vapor and liquid phases can fully contact each other. However, in the existing valve-fed columns, the valve is easy to get stuck in the valve hole, resulting in frequent maintenance by the staff. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by proposing a distillation column for methanol-to-hydrogen production.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a distillation column for methanol-to-hydrogen production, comprising a column body, an outlet pipe on the top surface of the column body, a discharge pipe on the bottom surface of the column body, a feed pipe in the middle of the side surface of the column body, multiple equidistantly distributed trays suspended inside the column body, an inlet pipe eccentrically fixed to the end face of each tray, two overflow weirs symmetrically fixed to the top surface of each tray, multiple arrayed sleeves between the two overflow weirs, a float plate slidably connected to the top surface of each sleeve, and an ejector inside each sleeve.

[0007] As a further description of the above technical solution: the inlet pipe is located outside the two overflow weirs, and the height of the sleeve is greater than the height of the overflow weirs.

[0008] As a further description of the above technical solution: the ejector includes a plurality of sector-shaped pieces hinged to the inner wall of the sleeve, the bottom surfaces of the plurality of sector-shaped pieces are commonly attached to a limiting ring, the limiting ring is fixedly sleeved on the inner wall of the sleeve, and the top center of the plurality of sector-shaped pieces is commonly attached to a support plate, the support plate is fixed to the bottom surface of the float.

[0009] As a further description of the above technical solution: the end face of the sleeve is symmetrically provided with two mounting grooves, and a hollow plate is inserted into each mounting groove. The two hollow plates are symmetrically fixed to the bottom surface of the float. A limiting member is provided inside the hollow plate. The limiting member slides through the hollow plate and is slidably connected to the mounting groove.

[0010] As a further description of the above technical solution: the limiting member includes a guide plate slidably connected within the hollow plate, a guide rod slidably passing through the side of the guide plate, the guide rod being fixedly connected within the hollow plate, a bolt threaded through the side of the guide plate, the end of the bolt being rotatably connected within the hollow plate, one end of the bolt rotatably penetrating through the hollow plate, a slot being provided in the mounting groove, the bolt being engaged in the slot, a guide block being fixedly connected to the lower end of the side of the guide plate, the guide block slidably penetrating through the hollow plate, a guide groove being provided on the inner wall of the mounting groove, and the guide block being slidably connected within the guide groove.

[0011] As a further description of the above technical solution: multiple floating plates are distributed in a radially equidistant annular array on the inner wall of the sleeve.

[0012] As a further description of the above technical solution: the top surface of the tower plate is provided with a threaded groove, the lower outer edge of the sleeve is provided with an external thread, the sleeve is threadedly connected in the threaded groove, the bottom wall of the threaded groove is provided with an air hole, and the air hole communicates with the sleeve.

[0013] This utility model has the following beneficial effects:

[0014] Compared with existing technologies, this methanol-to-hydrogen distillation column has a top-out component consisting of multiple fan-shaped plates and a support plate inside the casing. This component provides upward assistance for the float plate to float upward, preventing the float plate from getting stuck on the top surface of the casing and thus preventing it from floating smoothly. The casing is threaded to the tower plate, and the float plate is slidably connected to the top surface of the casing through a hollow plate and a limiting component, which facilitates the disassembly and replacement of damaged float plates. Attached Figure Description

[0015] Figure 1 This is a three-dimensional view of the overall structure of a distillation column for methanol-to-hydrogen proposed in this utility model;

[0016] Figure 2This is a three-dimensional view of the overall structure of the tray of a distillation column for methanol-to-hydrogen proposed in this utility model;

[0017] Figure 3 This is a front view of the overall structure of the tray of a distillation column for methanol-to-hydrogen proposed in this utility model;

[0018] Figure 4 This is a cross-sectional view of the connection between the tray and the casing of a distillation column for methanol-to-hydrogen production according to the present invention.

[0019] Figure 5 This is a cross-sectional view of the connection between the float plate and the casing of a methanol-to-hydrogen distillation column proposed in this utility model.

[0020] Figure 6 This is a cross-sectional view of the connection between the hollow plate and the casing of a distillation column for methanol-to-hydrogen production according to this utility model.

[0021] Figure 7 This is a top view of the connection between the fan-shaped plate and the casing of a distillation column for methanol-to-hydrogen production according to this utility model.

[0022] Legend:

[0023] 1. Tower body; 2. Gas outlet pipe; 3. Feeding pipe; 4. Discharge pipe; 5. Tower plate; 6. Threaded groove; 7. Sleeve; 8. Overflow weir; 9. Float plate; 10. Liquid inlet pipe; 11. Support plate; 12. Air hole; 13. Mounting groove; 14. Guide groove; 15. Guide block; 16. Hollow plate; 17. Fan-shaped plate; 18. Limiting ring; 19. Guide plate; 20. Guide rod; 21. Bolt; 22. Slot. Detailed Implementation

[0024] 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.

[0025] Reference Figures 1 to 7This utility model provides a distillation column for methanol-to-hydrogen production: It includes a column body 1, a gas outlet pipe 2 on the top surface of the column body 1, a discharge pipe 4 on the bottom surface of the column body 1, a feed pipe 3 in the middle of the side surface of the column body 1, multiple equidistantly distributed trays 5 suspended inside the column body 1, an inlet pipe 10 eccentrically fixed to the end face of each tray 5, two overflow weirs symmetrically fixed to the top surface of the tray 5, multiple arrayed sleeves 7 between the two overflow weirs 8, a threaded groove 6 on the top surface of the tray 5, and an external thread on the lower outer edge of the sleeve 7, with the sleeve 7 threadedly connected to the threaded... Inside the groove 6, the bottom wall of the threaded groove 6 is provided with an air hole 12, which is connected to the sleeve 7. A float 9 is slidably connected to the top surface of each sleeve 7. An ejector is provided inside the sleeve 7. The liquid inlet pipe 10 is located outside the two overflow weirs 8, and the height of the sleeve 7 is greater than the height of the overflow weir 8. Two mounting grooves 13 are symmetrically provided on the end face of the sleeve 7. A hollow plate 16 is inserted into each mounting groove 13. The two hollow plates 16 are symmetrically fixed on the bottom surface of the float 9. A limiting member is provided inside the hollow plate 16. The limiting member slides through the hollow plate 16 and is slidably connected to the mounting groove 13.

[0026] The ejector includes multiple fan-shaped pieces 17 hinged to the inner wall of the sleeve 7, multiple floats 9 are arranged in a radially equidistant annular array on the inner wall of the sleeve 7, the bottom surfaces of the multiple fan-shaped pieces 17 are together attached to a limiting ring 18, the limiting ring 18 is fixedly sleeved on the inner wall of the sleeve 7, and the center of the top surfaces of the multiple fan-shaped pieces 17 are together attached to a support plate 11, the support plate 11 is fixed to the bottom surface of the floats 9;

[0027] The limiting component includes a guide plate 19 slidably connected within the hollow plate 16, a guide rod 20 slidably passing through the side of the guide plate 19, the guide rod 20 being fixedly connected within the hollow plate 16, a bolt 21 threadedly passing through the side of the guide plate 19, the end of the bolt 21 being rotatably connected within the hollow plate 16, and one end of the bolt 21 rotatably penetrating through the hollow plate 16, a slot 22 being provided in the mounting groove 13, the bolt 21 being engaged in the slot 22, a guide block 15 being fixedly connected to the lower side of the guide plate 19, the guide block 15 slidably penetrating through the hollow plate 16, a guide groove 14 being provided on the inner wall of the mounting groove 13, and the guide block 15 being slidably connected within the guide groove 14.

[0028] An ejector component consisting of multiple fan-shaped plates 17 and a support plate 11 is installed inside the sleeve 7 to provide upward assistance for the upward floating of the float plate 9, preventing the float plate 9 from getting stuck on the top surface of the sleeve 7 and thus preventing the float plate 9 from floating smoothly. The sleeve 7 is threadedly connected to the tower plate 5, and the float plate is slidably connected to the top surface of the sleeve 7 through the hollow plate 16 and the limiting component, which facilitates the disassembly and replacement of damaged float plates 9.

[0029] Working principle: During operation, the gas inside the tower body 1 enters the sleeve 7 through the vent 12. The gas inside the sleeve 7, through air pressure, pushes each sector 17 upward, causing each sector 17 to flip upward simultaneously, pushing the support plate 11 upward. The support plate 11 then drives the float 9 upward, causing the float 9 to separate from the top surface of the sleeve 7. The gas inside the sleeve 7 passes through the gaps between the sector 17 and enters directly below the float 9. With the assistance of the sector 17 and the support plate 11, the float 9 is lifted by the sleeve 7. The gas inside is blown upwards, thus preventing the float plate 9 from getting stuck on the top surface of the sleeve 7. When the float plate 9 is damaged, the sleeve 7 is unscrewed from the threaded groove 6, and then the float plate 9 is pulled upwards, causing the bolt 21 to leave the slot 22. Then the bolt 21 is rotated, and the bolt 21 drives the guide plate 19 to move into the hollow plate 16. The guide plate 19 retracts the guide block 15 from the guide groove 14 into the hollow plate 16. Then the float plate 9 can be pulled upwards from the top surface of the sleeve 7, so that the float plate 9 or the sleeve 7 can be replaced separately.

[0030] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A rectifying column for hydrogen production from methanol, comprising a column body (1), a gas outlet pipe (2) is arranged on the top surface of the column body (1), a discharge pipe (4) is arranged on the bottom surface of the column body (1), and a feeding pipe (3) is arranged on the middle part of the side surface of the column body (1), characterized in that: The inside of the tower body (1) is suspendedly fixed with a plurality of equidistantly distributed tower plates (5), the end face of each tower plate (5) is eccentrically fixed with a liquid inlet pipe (10), the top face of the tower plate (5) is symmetrically fixed with two overflow weirs (8), a plurality of arrayed distribution sleeve pipes (7) are arranged between the two overflow weirs (8), the top face of each sleeve pipe (7) is slidably connected with a floating plate (9), and the sleeve pipe (7) is provided with an ejection member.

2. The rectification column for hydrogen production from methanol according to claim 1, characterized in that: The liquid inlet pipe (10) is located outside the two overflow weirs (8), and the height of the sleeve pipe (7) is greater than the height of the overflow weir (8).

3. The rectifying column for hydrogen production from methanol according to claim 1, characterized in that: The ejection member comprises a plurality of fan-shaped pieces (17) hinged to the inner wall of the sleeve pipe (7), the bottom face of the plurality of fan-shaped pieces (17) is jointly attached to a limiting ring (18), the limiting ring (18) is fixedly sleeved on the inner wall of the sleeve pipe (7), and the top face of the plurality of fan-shaped pieces (17) is jointly attached to a support plate (11) at the center, and the support plate (11) is fixed to the bottom face of the floating plate (9).

4. The rectification column for hydrogen production from methanol according to claim 1, characterized in that: The end face of the sleeve pipe (7) is symmetrically provided with two mounting grooves (13), each mounting groove (13) is respectively inserted with a hollow plate (16), and the two hollow plates (16) are symmetrically fixed to the bottom face of the floating plate (9). The hollow plate (16) is provided with a limiting member which slidably penetrates the hollow plate (16) and is slidably connected with the mounting groove (13).

5. The rectification column for hydrogen production from methanol according to claim 4, characterized in that: The limiting member comprises a guide plate (19) slidably connected in the hollow plate (16), a guide rod (20) slidably penetrating the side face of the guide plate (19) is fixedly connected in the hollow plate (16), a bolt (21) threadedly penetrating the side face of the guide plate (19) is rotatably connected in the hollow plate (16), one end of the bolt (21) rotatably penetrates the hollow plate (16), a clamping groove (22) is arranged in the mounting groove (13), the bolt (21) is clamped in the clamping groove (22), a guide block (15) is fixedly connected to the lower end of the side face of the guide plate (19), the guide block (15) slidably penetrates the hollow plate (16), and a guide groove (14) is arranged on the inner wall of the mounting groove (13), and the guide block (15) is slidably connected in the guide groove (14).

6. The rectification column for hydrogen production from methanol according to claim 3, characterized in that: A plurality of floating plates (9) are radially and equidistantly arranged in an annular array on the inner wall of the sleeve pipe (7).

7. The rectification column for hydrogen production from methanol according to claim 1, characterized in that: The top face of the tower plate (5) is provided with a threaded groove (6), the lower end of the sleeve pipe (7) is provided with an external thread, the sleeve pipe (7) is threadedly connected in the threaded groove (6), the bottom wall of the threaded groove (6) is provided with an air hole (12), and the air hole (12) is in communication with the sleeve pipe (7).

Images