Methanol recovery device

Abstract

The utility model relates to the technical field of methanol recovery, in particular to a methanol recovery device. The methanol recovery device comprises a tank body, two ends of the tank body are respectively provided with a water inlet pipe and a water outlet pipe, and the outer side wall of the tank body is provided with a gas inlet pipe and a gas outlet pipe; a spraying head is further arranged in the tank body, the spraying head is located in the tank body, the spraying head is rotationally connected to the water inlet pipe, the spraying head is provided with at least one spraying opening, and the spraying head can be driven to rotate in the process that the absorbent is sprayed out through the spraying opening. According to the utility model, the rotatable spray header is arranged in the tank body, and the spray header is driven to rotate through counter-acting force in the process of spraying an absorbent by the spray header, so that the absorbent sprayed by the spray header can fully fill the area inside the tank body, and gas methanol can be fully contacted with the absorbent.

Description

A methanol recovery device Technical Field

[0001] This utility model relates to the field of methanol recovery technology, specifically to a methanol recovery device. Background Technology

[0002] Methanol recovery processes mainly include distillation, extraction, absorption, condensation, and adsorption. In some complex industrial processes, these processes can be combined to achieve better methanol recovery.

[0003] The absorption method involves using an absorbent (such as water or ethylene glycol) to absorb gaseous methanol, and then recovering the methanol through a regeneration process. In practical applications, a single tank is typically used. Gaseous methanol is introduced into the tank while the absorbent is sprayed inside to achieve absorption. The more evenly the absorbent is sprayed, the more thorough the contact between the absorbent and the gaseous methanol, and the lower the methanol content in the gas discharged from the tank.

[0004] However, when the absorbent uses fixed nozzles, a large spray blind zone (the area where the absorbent is not sprayed) will appear in the tank when the number of nozzles is small. To reduce the spray blind zone, the number of nozzles can be increased, but increasing the number of nozzles will increase the cost. Summary of the Invention

[0005] The technical problem to be solved by this utility model is to provide a methanol recovery device that can effectively reduce the spray blind zone while using fewer nozzles and ensure that the absorbent and methanol gas are in full contact.

[0006] The technical solution proposed in this utility model is: a methanol recovery device, comprising:

[0007] The tank body has an inlet pipe and an outlet pipe at each end, and an air inlet pipe and an air outlet pipe on the outer wall of the tank body.

[0008] The tank also contains:

[0009] The spray head is located inside the tank and is rotatably connected to the water inlet pipe. The spray head has at least one spray nozzle, and the absorbent can drive the spray head to rotate as it is sprayed out through the spray nozzle.

[0010] Optional, the spray heads include:

[0011] The main body is a hollow structure with one end open;

[0012] At least one first branch pipe, the first branch pipe is a hollow structure with one end open, the first branch pipe is fixedly installed on the main body, the open end of the first branch pipe is connected to the inner cavity of the main body, and at least one spray nozzle is installed on the first branch pipe.

[0013] Optionally, the first branch pipe may have multiple spray nozzles, and the distances from the multiple spray nozzles to the main body rotation axis may increase sequentially.

[0014] Optionally, there are two first branch pipes, and the two first branch pipes are symmetrically arranged on both sides of the main body.

[0015] Optionally, the spray head may also include:

[0016] The second branch pipe is installed on the first branch pipe, and the inner cavity of the second branch pipe is connected to the inner cavity of the first branch pipe. The second branch pipe is provided with multiple spray nozzles, which are arranged sequentially along the rotation axis of the main body.

[0017] Optionally, the axis of the second branch pipe is parallel to the axis of rotation of the main body.

[0018] Optionally, the middle part of the second branch pipe is fixedly connected to the first branch pipe.

[0019] Optional, also includes:

[0020] Rotary joint, which connects the water inlet pipe and the spray head.

[0021] Optional, also includes:

[0022] The air distribution pipe is installed inside the tank and is connected to the air inlet pipe. At least one air jet hole is evenly arranged on the air distribution pipe.

[0023] Optionally, the air distribution tube is annular.

[0024] Compared with the prior art, the beneficial effects of this utility model are:

[0025] This invention features a rotatable spray head installed inside the tank. During the spraying of the absorbent, the spray head rotates due to a reaction force, ensuring that the absorbent sprayed from the spray head can fully fill the area inside the tank and guarantee that the gaseous methanol can fully contact the absorbent. Attached Figure Description

[0026] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0027] Figure 1 is a schematic diagram of the internal structure of this utility model;

[0028] Figure 2 is a schematic diagram of the spray head structure of Embodiment 2 of this utility model;

[0029] Figure 3 is a top view of the spray head in Embodiment 3 of this utility model;

[0030] Figure 4 is a cross-sectional view of the first branch pipe in Embodiment 3 of this utility model;

[0031] Figure 5 is a schematic diagram of the spray head structure of Embodiment 4 of this utility model;

[0032] Figure 6 is a cross-sectional view of the second branch pipe in Embodiment 4 of this utility model.

[0033] In the diagram: 1. Tank body; 11. Water inlet pipe; 12. Water outlet pipe; 13. Air inlet pipe; 14. Air outlet pipe; 15. Air distribution pipe; 151. Air jet hole; 2. Spray head; 21. Spray nozzle; 22. Main body; 23. First branch pipe; 24. Second branch pipe; 3. Rotary joint. Detailed Implementation

[0034] 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.

[0035] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0036] Example 1

[0037] Referring to Figures 1-6, the methanol recovery device of this utility model includes a tank 1, which is a cylindrical hollow structure. A water inlet pipe 11 is installed at the top, a water outlet pipe 12 is installed at the bottom, and an air inlet pipe 13 and an air outlet pipe 14 are installed on its outer side wall, with the air outlet pipe 14 located above the air inlet pipe 13. To spray the absorbent into the tank 1, a spray head 2 is provided. The spray head 2 is connected to the lower end of the water inlet pipe 11 and has a spray nozzle 21. When the absorbent is sprayed from the spray nozzle 21, the reaction force can drive the spray head 2 to rotate around its axis of rotation (coinciding with the axis of the water inlet pipe 11). Using a smaller number of spray nozzles 21 ensures that the absorbent can be fully distributed within the inner cavity of the tank 1.

[0038] Under the premise of using the same number of spray nozzles 21, compared with the scheme where the spray head 2 is fixed relative to the water inlet pipe 11, the sprayed absorbent can be more evenly distributed in the tank 1 by using the rotating spray head 2, which can effectively reduce the spray blind area.

[0039] It should be noted that the absorbent in the above scheme is liquid. The absorbent can be water, alkaline solution, organic solvent, or other special media capable of absorbing methanol gas. Water is preferred.

[0040] As a preferred embodiment, a gas distribution pipe 15 can also be installed inside the tank body 1. The gas distribution pipe 15 is located inside the tank body 1, and the gas inlet pipe 13 is connected to the gas distribution pipe 15. The methanol-containing gas input by the gas inlet pipe 13 is evenly input into the tank body 1 through the gas distribution pipe 15.

[0041] As a further preferred option, the gas distribution pipe 15 is preferably annular, and a plurality of jet holes 151 are evenly arranged on the gas distribution pipe 15, through which the gas containing methanol enters the tank 1.

[0042] As a further preferred option, the jet hole 151 is set vertically downward to prevent the absorbent from entering the air distribution pipe 15.

[0043] As a preferred option, an atomizing nozzle can be installed on the spray port 21 so that the absorbent can be evenly introduced into the tank 1 from the spray port 21.

[0044] As a preferred embodiment, the openings of the air inlet pipe 13 and the air outlet pipe 14 are inclined upwards (not shown in the figure). This method can prevent the absorbent from being discharged outside the tank 1 along the air inlet pipe 13 or the air outlet pipe 14.

[0045] As a preferred embodiment, the bottom of the inner cavity of the tank 1 is spherical or conical (not shown in the figure), and the connection between the water outlet pipe 12 and the inner cavity of the tank 1 is at the lowest point of the bottom surface of the inner cavity of the tank 1. In this way, the absorbent can be guided to be discharged from the tank 1.

[0046] As a preferred embodiment, a rotary joint 3 is also provided. The two ends of the rotary joint 3 are respectively connected to the water inlet pipe 11 and the spray head 2. The rotary joint 3 includes two pipe sections that are coaxially arranged and connected to each other, and the two pipe sections can rotate relative to each other.

[0047] It should be noted that the rotary joint 3 is existing technology and can also be called an anti-winding joint.

[0048] It should be noted that one section of the rotary joint 3 can be integrally formed with the spray head 2. In this case, the other section of the rotary joint 3 can rotate relative to the spray head 2.

[0049] The working principle of this utility model is as follows: Gas containing methanol is introduced into the tank 1 through the inlet pipe 13, and the gas containing methanol enters the tank evenly through the jet hole 151 on the gas distribution pipe 15; at the same time, absorbent is injected into the tank 1 through the water inlet pipe 11 at the top. When the absorbent passes through the spray head 2, it pushes the spray head 2 to rotate, so that the absorbent can be evenly dispersed in the tank 1, thereby fully contacting the methanol gas. The air with methanol removed is discharged from the gas outlet pipe 14 at the top; the absorbent that has absorbed methanol is discharged from the water outlet pipe 12 at the bottom, and methanol is recovered after further processing.

[0050] Example 2

[0051] The spray head 2 in Example 1 is described in detail.

[0052] Referring to Figure 2, the spray head 2 has a main body 22, which is a hollow structure with an opening at the top. The opening at the top is connected to one end of the rotary joint 3. When the spray head 2 only has the main body 22, the spray nozzle 21 is provided on the main body 22. Specifically, the spray nozzle 21 can be provided on the outer wall of the main body 22 or at the bottom of the main body 22.

[0053] It should be noted that, in order to ensure that the main body 22 can rotate around its axis of rotation, taking the spray nozzle located on the outer side wall of the main body 22 as an example, the spray nozzle 21 on the main body 22 has a spray angle α (i.e., the angle between the projection of the spray nozzle 21 on the horizontal plane and the radial direction), α is greater than 0 degrees and less than 180 degrees; so that the reaction force acting on the spray head 2 when the absorbent is sprayed from the spray nozzle 21 can drive the main body 22 to rotate.

[0054] It should be noted that, in the vertical direction, the spray nozzle 21 can be set to tilt upward, horizontally, or tilt downward as needed.

[0055] As the preferred option, 30≤a≤60.

[0056] Example 3

[0057] Further improvements were made based on Example 2.

[0058] Referring to Figures 3 and 4, the spray head 2 is also provided with a first branch pipe 23. The first branch pipe 23 is fixedly installed on the outer side wall of the main body 22. The first branch pipe 23 is a hollow structure with one end open. Its open end is connected to the inner cavity of the main body 22. The spray nozzle 21 can be installed on the first branch pipe 23. The number of spray nozzles 21 installed on the first branch pipe 23 is at least one.

[0059] It should be noted that the first branch pipe 23 can be a straight pipe or a bent pipe as required.

[0060] It should be noted that when the first branch pipe 23 is equipped with a spray nozzle 21, the main body 22 can be equipped with a spray nozzle 21 as needed.

[0061] As a preferred embodiment, there are two first branch pipes 23, symmetrically arranged on both sides of the main body 22. In this embodiment, the first branch pipes 23 are straight pipes, and the axes of the two first branch pipes 23 coincide. When no spray nozzle 21 is provided on the main body 22, in order to drive the spray head 2 to rotate, the spray angle of the spray nozzle 21 on the first branch pipe 23 is b (the angle between the projection of the spray nozzle 21 on the plane perpendicular to the first branch pipe 23 and the vertical direction), b is greater than 0 degrees and less than 180 degrees; so that the reaction force acting on the spray head 2 when the absorbent is sprayed from the spray nozzle 21 can drive the main body 22 to rotate.

[0062] As a further preferred option, 30≤a≤150.

[0063] It should be noted that the spray nozzles 21 on the two first branch pipes 23 are centrally symmetrical about the axis of rotation of the main body 22. With this design, after the absorbent is sprayed out from the spray nozzles 21 on the two first branch pipes 23, it drives the spray head 2 to rotate in the same direction.

[0064] As a further preferred embodiment, the first branch pipe 23 has multiple spray nozzles 21, and the distances from the multiple spray nozzles 21 to the rotation axis of the main body 22 increase sequentially. By arranging multiple spray nozzles 21 in the radial direction, the uniformity of the absorbent distribution in the horizontal direction can be further ensured after the spray head 2 rotates.

[0065] It should be noted that, obviously, three or more first branch pipes 23 can also be set.

[0066] Example 4

[0067] Further improvements were made based on Example 3.

[0068] Referring to Figures 5 and 6, a second branch pipe 24 is fixedly installed on the first branch pipe 23. The inner cavity of the second branch pipe 24 is connected to the inner cavity of the first branch pipe 23. Multiple spray nozzles 21 are provided on the second branch pipe 24 and arranged sequentially in the vertical direction. This method ensures that the absorbent is evenly distributed in the vertical space inside the tank 1.

[0069] When neither the main body 22 nor the first branch pipe 23 is equipped with a spray nozzle 21, the spray angle of the spray nozzle 21 on the second branch pipe 24 is c (i.e., the angle between the projection of the spray nozzle 21 on the horizontal plane and the radial direction), which is greater than 0 degrees and less than 180 degrees; so that the reaction force acting on the spray head 2 when the absorbent is sprayed out from the spray nozzle 21 can drive the main body 22 to rotate.

[0070] As a further preferred option, 30≤c≤150.

[0071] It should be noted that when a second branch pipe 24 is provided, a spray nozzle 21 can also be provided on the main body 22 as needed.

[0072] As a preferred embodiment, the middle part of the second branch pipe 24 is fixedly connected to the first branch pipe 23, so that the spray head 2 has better stability when it rotates.

[0073] It should be noted that multiple second branch pipes 24 can be installed along the length of each first branch pipe 23 (the first branch pipe 23 is a straight pipe and is set in the radial direction).

[0074] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A methanol recovery device, comprising: The tank (1) has an inlet pipe (11) and an outlet pipe (12) at its two ends respectively. An air inlet pipe (13) and an air outlet pipe (14) are provided on the outer side wall of the tank (1). The tank (1) is characterized by having a spray head (2) inside the tank (1). The spray head (2) is located inside the tank (1) and is rotatably connected to the inlet pipe (11). The spray head (2) has at least one spray nozzle (21). The absorbent can drive the spray head (2) to rotate during the process of being sprayed out through the spray nozzle (21).

2. The methanol recovery device according to claim 1, characterized in that, The spray head (2) includes: a main body (22), which is a hollow structure with one end open; at least one first branch pipe (23), which is a hollow structure with one end open, the first branch pipe (23) is fixedly installed on the main body (22), the open end of the first branch pipe (23) is connected to the inner cavity of the main body (22), and at least one spray nozzle (21) is installed on the first branch pipe (23).

3. The methanol recovery device according to claim 2, characterized in that, The first branch pipe (23) has multiple spray nozzles (21), and the distance from the multiple spray nozzles (21) to the rotation axis of the main body (22) increases sequentially.

4. The methanol recovery device according to claim 2, characterized in that, There are two first branch pipes (23), and the two first branch pipes (23) are symmetrically arranged on both sides of the main body (22).

5. The methanol recovery device according to claim 2, characterized in that, The spray head (2) also includes: a second branch pipe (24), which is set on the first branch pipe (23). The inner cavity of the second branch pipe (24) is connected to the inner cavity of the first branch pipe (23). Multiple spray nozzles (21) are provided on the second branch pipe (24). The multiple spray nozzles (21) on the second branch pipe (24) are arranged sequentially along the rotation axis of the main body (22).

6. The methanol recovery device according to claim 5, characterized in that, The axis of the second branch pipe (24) is parallel to the rotation axis of the main body (22).

7. The methanol recovery device according to claim 6, characterized in that, The middle part of the second branch pipe (24) is fixedly connected to the first branch pipe (23).

8. The methanol recovery device according to claim 1, characterized in that, Also includes: Rotary joint (3) is connected between water inlet pipe (11) and spray head (2).

9. The methanol recovery device according to claim 1, characterized in that, It also includes: an air distribution pipe (15), which is installed inside the tank body (1), and is connected to the air inlet pipe (13). At least one air jet hole (151) is provided on the air distribution pipe (15).

10. The methanol recovery device according to claim 9, characterized in that, The air distribution tube (15) is annular.

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