Corrosion-resistant methanol rectification pretreatment device

Abstract

The utility model relates to the technical field of methanol rectification pretreatment, in particular to a corrosion-resistant methanol rectification pretreatment device, which comprises a pretreatment rectification tank, a pretreatment mixing tank and a pump body, a mounting plate is fixedly connected to the left part of the outer surface of the pretreatment mixing tank, a fixing plate is fixedly connected to the middle part of the left inner wall surface of the mounting plate, and a control mechanism is inserted into the lower end of the fixing plate. According to the corrosion-resistant methanol rectification pretreatment device disclosed by the utility model, the first flow guide plates and the second flow guide plates in the primary rectification mixing assembly are distributed in a staggered manner and are matched with the design of the pre-mixing flow guide grooves, so that methanol and alkali liquor are continuously changed in direction in the flowing process, primary mixing and rectification are realized, acidic substances are effectively neutralized, and the quality of the methanol is improved. Corrosion to the pretreatment rectification tank and subsequent equipment is greatly reduced, and the service life of the equipment is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of methanol distillation pretreatment technology, and in particular to a corrosion-resistant methanol distillation pretreatment device. Background Technology

[0002] In the coal-to-methanol process, the crude methanol produced has a complex composition, mainly methanol, but also contains a certain amount of water, a small amount of ethanol, a certain amount of non-condensable gases, and other trace organic impurities. Due to the presence of trace acidic substances, the methanol distillation process will cause varying degrees of corrosion to the top condenser, reflux equipment, and non-condensable gas discharge pipelines. This not only shortens the service life of the equipment but also increases the equipment maintenance costs and safety risks. At the same time, these acidic substances will also affect the quality of the product methanol. Therefore, we have introduced a corrosion-resistant methanol distillation pretreatment device. Utility Model Content

[0003] The main objective of this invention is to provide a corrosion-resistant methanol distillation pretreatment device that can effectively solve the problems in the background art.

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

[0005] A corrosion-resistant methanol distillation pretreatment device includes a pretreatment distillation tank, a pretreatment mixing tank, and a pump body. A primary distillation mixing assembly is fixedly connected to the inner wall of the pretreatment distillation tank. A feed pipe is fixedly connected to the upper right side of the pretreatment distillation tank. A methanol inlet pipe is fixedly connected to the upper left side of the feed pipe. An alkali inlet pipe is fixedly connected to the upper right side of the feed pipe. Flow regulating valves are movably installed on the outer surfaces of both the methanol and alkali inlet pipes. A mounting plate is fixedly connected to the left side of the outer surface of the pretreatment mixing tank. A fixing plate is fixedly connected to the middle of the left inner wall of the mounting plate. A control mechanism is installed at the lower end of the fixing plate. Three fixing blocks are fixedly connected to the upper outer surface of the pretreatment distillation tank and the upper outer surface of the pretreatment mixing tank. Each of the six fixing blocks has a through-hole at its upper end. A first conveying pipe is inserted and fixedly installed at the right end of the pump body, and the upper end of the first conveying pipe is inserted and fixedly connected to the lower end of the pretreatment distillation tank. A second conveying pipe is inserted and fixedly installed at the upper outer surface of the pump body, and the lower left end of the second conveying pipe is inserted and fixedly connected to the upper right end of the pretreatment mixing tank. A liquid outlet pipe is inserted and fixedly connected to the lower left end of the pretreatment mixing tank. Switch valves are movably installed on the outer surfaces of the feed pipe, the first conveying pipe, the second conveying pipe, and the liquid outlet pipe.

[0006] The primary distillation mixing assembly includes a first guide plate and a second guide plate, with two of each. The upper ends of the two first guide plates and the two second guide plates are provided with a plurality of premixing guide grooves. The outer surfaces of the two first guide plates and the two second guide plates are fixedly connected to the inner wall of the pretreatment distillation tank.

[0007] Preferably, both first guide vanes are positioned at the lower left and upper right, and both second guide vanes are positioned at the upper left and lower right, with the two first guide vanes and the two second guide vanes being distributed in a staggered, alternating pattern.

[0008] By adopting the above technical solution—with two first guide plates positioned at the lower left and upper right, and two second guide plates positioned at the upper left and lower right, and staggered in pairs—the flow direction of methanol and alkali solution entering the pretreatment distillation tank undergoes continuous and drastic changes as they pass through the first and second guide plates. This complex flow path promotes thorough interweaving and collision of the two liquids, greatly improving the uniformity of mixing. Compared with conventional parallel or single-angle guide plate settings, this allows methanol and alkali solution to achieve more thorough mixing in a shorter time, laying a solid foundation for the subsequent effective neutralization of acidic substances, thereby more efficiently reducing equipment corrosion and ensuring stable operation of the unit.

[0009] Preferably, the control mechanism includes a servo motor and a driven wheel. The output end of the servo motor is fixedly mounted with a driving wheel. The outer surfaces of the driving wheel and the driven wheel are connected by a transmission belt. The lower end of the driven wheel is fixedly connected with a stirring assembly. The lower end of the servo motor is fixedly connected to the lower inner wall of the mounting plate. The upper end of the servo motor is fixedly connected to the lower end of the fixed plate, and the output end of the servo motor passes through the lower end of the fixed plate and extends to the upper end of the fixed plate.

[0010] By adopting the above technical solution, stable power transmission is achieved through the combination of the driving pulley, the transmission belt, and the driven pulley.

[0011] Preferably, the upper ends of both the driven wheel and the driving wheel are movably connected to the upper inner wall of the mounting plate via a rotating shaft.

[0012] By adopting the above technical solution, the driven wheel and the driving wheel are connected to the inner wall of the mounting plate through the rotating shaft, forming a stable mechanical support structure.

[0013] Preferably, the stirring assembly includes a movable rod, an upper flange fixedly connected to the lower end of the movable rod, a rotating rod fixedly connected to the lower end of the upper flange, a first spiral stirring blade and a second spiral stirring blade fixedly connected to the outer surface of the rotating rod, a lower flange fixedly connected to the lower end of the rotating rod, and the upper end of the movable rod fixedly connected to the lower end of the driven wheel.

[0014] By adopting the above technical solution, the first and second spiral stirring blades fixed on the outer surface of the rotating rod are staggered. When the stirring assembly rotates with the driven wheel, the first and second spiral stirring blades can form a complex and comprehensive stirring flow field in the pretreatment mixing tank. Under this strong stirring action, acidic substances can come into contact with the alkaline solution more quickly and evenly and undergo a neutralization reaction, which greatly improves the mixing efficiency and neutralization effect, ensures the stability of methanol quality after pretreatment, and reduces the risk of corrosion of subsequent equipment by acidic substances.

[0015] Preferably, the lower end of the movable rod is movably connected to the upper end of the pretreatment mixing tank via a bearing, and the lower end of the rotating rod is movably connected to the lower inner wall of the pretreatment mixing tank via a rotating shaft.

[0016] By adopting the above technical solution: the lower end of the movable rod is movably connected to the upper end of the pretreatment mixing tank through a bearing, and the lower end of the rotating rod is movably connected to the lower inner wall of the pretreatment mixing tank through a rotating shaft. This creates a stable upper and lower support system for the stirring assembly.

[0017] Preferably, the first and second spiral stirring blades are staggered, and both the first and second spiral stirring blades have gaps with the inner wall of the pretreatment mixing tank.

[0018] By adopting the above technical solution, the gaps between the first and second spiral stirring blades and the inner wall of the pretreatment mixing tank effectively prevent the first and second spiral stirring blades from scratching and wearing the inner wall of the pretreatment mixing tank.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] 1. In this utility model, by setting a methanol inlet pipe and an alkali inlet pipe on the feed pipe and equipping them with a flow regulating valve, the feed ratio of methanol and alkali can be controlled to ensure that the two enter the pretreatment distillation tank in a suitable ratio. In the pretreatment distillation tank, the first guide plate and the second guide plate in the primary distillation mixing component are staggered and designed in conjunction with the premixing guide channel, so that methanol and alkali continuously change direction during the flow process, realizing preliminary mixing and distillation, effectively neutralizing acidic substances, greatly reducing corrosion to the pretreatment distillation tank and subsequent equipment, and extending the service life of the equipment;

[0021] In this invention, the pump body transports the pre-treated liquid from the pretreatment distillation tank to the pretreatment mixing tank through the first and second conveying pipes. In the pretreatment mixing tank, the control mechanism drives the stirring assembly to fully stir and mix the liquid. The servo motor drives the movable rod, rotating rod, and the staggered first and second spiral stirring blades to rotate through the driving wheel, transmission belt, and driven wheel, so that the methanol and alkali solution are further mixed evenly, ensuring that the acidic substances are fully neutralized, thereby stabilizing the quality of the product methanol and avoiding severe corrosion problems to the top condenser, reflux equipment, and non-condensable gas discharge pipeline in subsequent processing. Attached Figure Description

[0022] The accompanying drawings are provided to further understand this application and form part of the specification. They are used together with the embodiments of this application to explain this application and do not constitute a limitation thereof.

[0023] Figure 1 This is a schematic diagram of the overall structure of a corrosion-resistant methanol distillation pretreatment device according to the present invention.

[0024] Figure 2 This is a cross-sectional view of the structure of a corrosion-resistant methanol distillation pretreatment device according to the present invention (in which the pretreatment distillation tank and the pretreatment mixing tank are cut out).

[0025] Figure 3 This is a schematic diagram of the overall structure of the primary distillation mixing assembly of a corrosion-resistant methanol distillation pretreatment device according to the present invention (the pretreatment distillation tank is cut out).

[0026] Figure 4 This invention relates to a corrosion-resistant methanol distillation pretreatment device. Figure 3 Enlarged view of the structure at point A in the image;

[0027] Figure 5 This is a schematic diagram of the overall structure of the control mechanism of a corrosion-resistant methanol distillation pretreatment device according to the present invention.

[0028] Figure 6 This is a schematic diagram of the overall structure of the stirring assembly of a corrosion-resistant methanol distillation pretreatment device according to this utility model.

[0029] In the diagram: 1. Pretreatment distillation tank; 2. Pretreatment mixing tank; 3. Primary distillation mixing assembly; 4. Mounting plate; 5. Fixing plate; 6. Control mechanism; 7. Fixing block; 8. Fixing hole; 9. Feed pipe; 10. Methanol inlet pipe; 11. Alkali inlet pipe; 12. Flow regulating valve; 13. Pump body; 14. First delivery pipe; 15. Second delivery pipe; 16. Discharge pipe; 17. Switch valve; 31. First guide plate; 32. Second guide plate; 33. Premixing guide channel; 61. Servo motor; 62. Driven wheel; 63. Drive wheel; 64. Transmission belt; 65. Stirring assembly; 651. Movable rod; 652. Upper flange; 653. Rotating rod; 654. First spiral stirring blade; 655. Second spiral stirring blade; 656. Lower flange. Detailed Implementation

[0030] 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.

[0031] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0032] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," and "connected," etc., should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0033] Please see Figure 1-6 This utility model provides a technical solution:

[0034] A corrosion-resistant methanol distillation pretreatment device includes a pretreatment distillation tank 1, a pretreatment mixing tank 2, and a pump body 13. A primary distillation mixing assembly 3 is fixedly connected to the inner wall of the pretreatment distillation tank 1. A feed pipe 9 is fixedly connected to the upper right side of the pretreatment distillation tank 1. A methanol inlet pipe 10 is fixedly connected to the upper left side of the feed pipe 9. An alkali inlet pipe 11 is fixedly connected to the upper right side of the feed pipe 9. Flow regulating valves 12 are movably installed on the outer surfaces of both the methanol inlet pipe 10 and the alkali inlet pipe 11. A mounting plate 4 is fixedly connected to the left side of the outer surface of the pretreatment mixing tank 2. A fixing plate 5 is fixedly connected to the middle of the left inner wall of the mounting plate 4. A control mechanism 6 is installed at the lower end of the fixing plate 5. Three fixing blocks 7 are fixedly connected to the upper part of the outer surface of the pump body 1 and the upper part of the outer surface of the pretreatment mixing tank 2. Each of the six fixing blocks 7 has a fixing hole 8 that passes through from top to bottom. The right end of the pump body 13 is inserted and fixedly installed with a first conveying pipe 14, and the upper end of the first conveying pipe 14 is inserted and fixedly connected to the lower end of the pretreatment distillation tank 1. The upper part of the outer surface of the pump body 13 is inserted and fixedly installed with a second conveying pipe 15, and the lower left part of the second conveying pipe 15 is inserted and fixedly connected to the upper right part of the pretreatment mixing tank 2. The lower left part of the pretreatment mixing tank 2 is inserted and fixedly connected with an outlet pipe 16. Switch valves 17 are movably installed on the outer surfaces of the feed pipe 9, the first conveying pipe 14, the second conveying pipe 15, and the outlet pipe 16.

[0035] In this embodiment, the primary distillation mixing assembly 3 includes a first guide plate 31 and a second guide plate 32. Two of each type of guide plate are provided. Several premixing guide grooves 33 are formed at the upper ends of both the first guide plates 31 and the second guide plates 32. The outer surfaces of both the first guide plates 31 and the second guide plates 32 are fixedly connected to the inner wall of the pretreatment distillation tank 1. Both first guide plates 31 are positioned at the lower left and upper right, and both second guide plates 32 are positioned at the lower right and upper left. The two first guide plates 31 and two second guide plates 32 are arranged in a staggered pattern, one above the other, with the design positioned at the top left and one below the bottom right. The control mechanism 6 includes a servo motor 61 and a driven wheel 62. A drive wheel 63 is fixedly mounted on the output end of the servo motor 61. A transmission belt 64 is connected to the outer surfaces of the drive wheel 63 and the driven wheel 62. A stirring assembly 65 is fixedly connected to the lower end of the driven wheel 62. The lower end of the servo motor 61 is fixedly connected to the lower inner wall of the mounting plate 4, and the upper end of the servo motor 61 is fixedly connected to the upper wall of the mounting plate 5. The lower end is fixedly connected, and the output end of the servo motor 61 passes through the lower end of the fixed plate 5 and extends to the upper end of the fixed plate 5; the upper ends of the driven wheel 62 and the upper ends of the driving wheel 63 are both movably connected to the upper inner wall of the mounting plate 4 through a rotating shaft; the stirring assembly 65 includes a movable rod 651, the lower end of the movable rod 651 is fixedly connected to an upper flange 652, the lower end of the upper flange 652 is fixedly connected to a rotating rod 653, and the outer surface of the rotating rod 653 is fixedly connected to a first spiral stirring blade 654 and a second spiral stirring blade 655. The lower end of 653 is fixedly connected to a lower flange 656, and the upper end of the movable rod 651 is fixedly connected to the lower end of the driven wheel 62. The lower end of the movable rod 651 is movably connected to the upper end of the pretreatment mixing tank 2 through a bearing. The lower end of the rotating rod 653 is movably connected to the lower inner wall surface of the pretreatment mixing tank 2 through a rotating shaft. The first spiral stirring blade 654 and the second spiral stirring blade 655 are staggered, and there are gaps between the first spiral stirring blade 654 and the second spiral stirring blade 655 and the inner wall surface of the pretreatment mixing tank 2.

[0036] It should be noted that this utility model is a corrosion-resistant methanol distillation pretreatment device. During use, the switch valve 17 on the feed pipe 9 is opened, and methanol is injected through the methanol inlet pipe 10. At the same time, alkali is injected through the alkali inlet pipe 11. The flow rate of methanol and alkali is adjusted by the flow regulating valve 12 so that they enter the pretreatment distillation tank 1 after entering the feed pipe 9 in a certain proportion. The methanol and alkali entering the pretreatment distillation tank 1 first come into contact with the primary distillation mixing component 3. The methanol and alkali flow along the premixing guide groove 33 on the first guide plate 31 and the second guide plate 32. Since the first guide plate 31 and the second guide plate 32 are staggered and have different inclination directions, the methanol and alkali continuously change direction during the flow, thereby achieving preliminary mixing and distillation. Then, the pump body 13 is started, and the switch valve 17 on the first delivery pipe 14 and the second delivery pipe 15 are opened simultaneously. The switch valve 17 on the pump body 13 draws the liquid in the pretreatment distillation tank 1 out through the first delivery pipe 14. The drawn liquid is then transported to the pretreatment mixing tank 2 through the second delivery pipe 15. The servo motor 61 in the control mechanism 6 is started, which drives the drive wheel 63 to rotate. The drive wheel 63 drives the driven wheel 62 to rotate through the transmission belt 64. The driven wheel 62 drives the stirring assembly 65 to rotate. The moving rod 651, rotating rod 653, first spiral stirring blade 654, and second spiral stirring blade 655 of the stirring assembly 65 rotate accordingly, fully stirring and mixing the liquid in the pretreatment mixing tank 2, so that the methanol and alkali solution are further mixed evenly and the acidic substances are neutralized. When the mixture in the pretreatment mixing tank 2 reaches a suitable degree of mixing and quality, the switch valve 17 on the outlet pipe 16 is opened, and the mixture in the pretreatment mixing tank 2 is discharged through the outlet pipe 16 and enters the subsequent process steps.

[0037] 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 corrosion-resistant methanol rectification pretreatment device, comprising a pretreatment rectification tank (1), a pretreatment mixing tank (2) and a pump body (13), characterized in that: The inner wall surface of the pretreatment rectification tank (1) is fixedly connected with a primary rectification mixing assembly (3), the upper end right part of the pretreatment rectification tank (1) is fixedly connected with a feed pipe (9), the upper end left part of the feed pipe (9) is fixedly connected with a methanol liquid inlet pipe (10), the upper end right part of the feed pipe (9) is fixedly connected with an alkali liquid inlet pipe (11), the outer surface of the methanol liquid inlet pipe (10) and the outer surface of the alkali liquid inlet pipe (11) are movably provided with flow regulating valves (12), the outer surface left part of the pretreatment mixing tank (2) is fixedly connected with a mounting plate (4), the left inner wall surface middle part of the mounting plate (4) is fixedly connected with a fixed plate (5), the lower end of the fixed plate (5) is movably provided with a control mechanism (6), the outer surface upper part of the pretreatment rectification tank (1) and the outer surface upper part of the pretreatment mixing tank (2) are fixedly connected with three fixed blocks (7), the upper end of the six fixed blocks (7) is provided with fixed holes (8) penetrating up and down, the right end of the pump body (13) is fixedly provided with a first conveying pipe (14), and the upper end of the first conveying pipe (14) is fixedly connected with the lower end of the pretreatment rectification tank (1), the outer surface upper part of the pump body (13) is fixedly provided with a second conveying pipe (15), and the lower end left part of the second conveying pipe (15) is fixedly connected with the upper end right part of the pretreatment mixing tank (2), the lower end left part of the pretreatment mixing tank (2) is fixedly connected with a liquid outlet pipe (16), and the outer surface of the feed pipe (9), the outer surface of the first conveying pipe (14), the outer surface of the second conveying pipe (15) and the outer surface of the liquid outlet pipe (16) are movably provided with on-off valves (17). The primary rectification mixing assembly (3) comprises first guide plates (31) and second guide plates (32), the first guide plates (31) and the second guide plates (32) are both provided with two, the upper end of the two first guide plates (31) and the upper end of the two second guide plates (32) are provided with a plurality of premixing guide grooves (33), and the outer surface of the two first guide plates (31) and the outer surface of the two second guide plates (32) are fixedly connected with the inner wall surface of the pretreatment rectification tank (1).

2. A corrosion resistant methanol rectification pre-treatment device according to claim 1, characterized in that: The two first guide plates (31) are arranged in a left lower right upper manner, the two second guide plates (32) are arranged in a left upper right lower manner, and the two first guide plates (31) and the two second guide plates (32) are alternately distributed in pairs.

3. A corrosion resistant methanol rectification pre-treatment device as claimed in claim 1, wherein: The control mechanism (6) comprises a servo motor (61) and a driven wheel (62), the output end of the servo motor (61) is fixedly provided with a driving wheel (63), the outer surface of the driving wheel (63) and the outer surface of the driven wheel (62) are jointly connected with a transmission belt (64), the lower end of the driven wheel (62) is fixedly connected with a stirring assembly (65), the lower end of the servo motor (61) is fixedly connected with the lower inner wall surface of the mounting plate (4), the upper end of the servo motor (61) is fixedly connected with the lower end of the fixed plate (5), and the output end of the servo motor (61) penetrates through the lower end of the fixed plate (5) and extends to the upper end of the fixed plate (5).

4. A corrosion resistant methanol rectification pre-treatment device according to claim 3, characterized in that: The upper end of the driven wheel (62) and the upper end of the driving wheel (63) are movably connected with the upper inner wall surface of the mounting plate (4) through rotating shafts.

5. A corrosion resistant methanol rectification pre-treatment device as claimed in claim 3, wherein: The stirring assembly (65) comprises a movable rod (651), the lower end of the movable rod (651) is fixedly connected with an upper flange (652), the lower end of the upper flange (652) is fixedly connected with a rotating rod (653), the outer surface of the rotating rod (653) is fixedly connected with a first spiral stirring blade (654) and a second spiral stirring blade (655), the lower end of the rotating rod (653) is fixedly connected with a lower flange (656), and the upper end of the movable rod (651) is fixedly connected with the lower end of the driven wheel (62).

6. A corrosion resistant methanol rectification pre-treatment device as claimed in claim 5, characterized in that: The lower end of the movable rod (651) is movably connected with the upper end of the pretreatment mixing tank (2) through a bearing, and the lower end of the rotating rod (653) is movably connected with the lower inner wall surface of the pretreatment mixing tank (2) through a rotating shaft.

7. A corrosion resistant methanol rectification pre-treatment device as claimed in claim 5, wherein: The first spiral stirring blade (654) and the second spiral stirring blade (655) are staggered, and gaps exist between the first spiral stirring blade (654), the second spiral stirring blade (655) and the inner wall surface of the pretreatment mixing tank (2).

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