Rectification device for green methanol production

Abstract

The invention relates to a rectification device for green methanol production, and relates to the technical field of methanol rectification, and the rectification device comprises a rectification tank, a reboiler, a gas-liquid mass transfer assembly, an adjusting assembly, a condensation assembly and a preheating assembly. The reboiler is arranged at the bottom of the rectification tank and provides gas for the rectification process, the gas-liquid mass transfer assembly is installed in the rectification tank and used for enabling gas and liquid phases of methanol to be in full contact to achieve substance exchange, and the adjusting assembly is installed on the gas-liquid mass transfer assembly and used for adjusting the running state of the gas-liquid mass transfer assembly. The condensation assembly is installed on the rectification tank and used for cooling and condensing high-temperature methanol steam into liquid, and the preheating assembly is installed on the rectification tank and used for preheating rectified raw materials. The rectification device has the effects of improving the rectification efficiency and reducing the energy consumption at the same time.

Description

Technical Field

[0001] The present application relates to the technical field of methanol distillation, and in particular to a distillation device for green methanol production. Background Art

[0002] Methanol is an important basic chemical product and organic chemical raw material. During the synthesis of methanol, due to the influence of synthesis conditions such as pressure, temperature and synthesis gas composition, a series of side reactions occur at the same time as the methanol reaction. In addition to methanol, the resulting products also include water, higher ethers, higher alcohols, aldehydes, ketones, alkanes and other organic impurities. Therefore, distillation is one of the key links. Distillation is the process of separating the components in the mixture by utilizing the different volatilities of the components.

[0003] At present, plate distillation towers are often used for methanol distillation. After the raw liquid enters the tower, it flows down step by step along the tower plates under the action of gravity. Under the action of the overflow weir, a certain liquid layer thickness is retained on each tower plate. The steam generated by heating part of the raw liquid rises from the bottom of the tower and disperses into the liquid layer of the tower plate in the form of bubbles to promote gas-liquid two-phase mass transfer, so that the volatile components are enriched at the top of the tower and the non-volatile components are gathered at the bottom of the tower, thereby realizing the separation of the mixture.

[0004] Regarding the above-mentioned related technologies, since the tower plates and overflow weirs are fixed settings, it is difficult to make rapid adjustments when the tower plates are blocked by liquid accumulation or the gas-liquid distribution is uneven, thereby affecting the separation efficiency. At the same time, during the distillation process, reheaters and condensers are required to continuously heat and condense the raw liquid, which consumes a lot of energy. Summary of the invention

[0005] In order to improve distillation efficiency and reduce energy consumption at the same time, the present application provides a distillation device for green methanol production.

[0006] The present application provides a distillation device for green methanol production, which adopts the following technical solution: A distillation device for green methanol production, comprising: A distillation tank, wherein a liquid phase port is provided at the upper end of the side wall of the distillation tank, and a gas phase port is provided on the top wall of the distillation tank; A reboiler, wherein a liquid inlet end of the reboiler is connected to the bottom of the rectification tank, and a gas outlet end of the reboiler is connected to the bottom side wall of the rectification tank; A gas-liquid mass transfer component, which is installed in the distillation tank and is used to make the methanol gas and liquid phases fully contact to achieve material exchange; A regulating component, the regulating component is installed on the gas-liquid mass transfer component, and the regulating component is used to adjust the operating state of the gas-liquid mass transfer component; A condensation component, which is installed on the distillation tank and is used to cool and condense high-temperature methanol vapor into liquid; A preheating component is installed on the distillation tank and is used to preheat the raw materials for distillation.

[0007] By adopting the above technical scheme, when performing distillation for methanol production, the raw liquid enters from the liquid phase port of the distillation tank, the reboiler provides heat for the distillation process, causes the liquid to vaporize and rise, the gas-liquid mass transfer component promotes full contact between the methanol gas and liquid phases, realizes material exchange, and separates the mixture, while the condensation component promptly cools and condenses the high-temperature methanol vapor into liquid, part of which is used as reflux liquid to maintain gas-liquid balance and mass transfer and heat transfer in the tower, and part is output as product.

[0008] During the separation process, the regulating component can flexibly adjust the operating status of the gas-liquid mass transfer component according to the actual situation, effectively deal with the possible liquid accumulation and blockage or uneven gas-liquid distribution on the tower plate, and respond quickly to improve the separation efficiency. The preheating component fully collects the energy provided by the reheater to preheat the distillation raw materials, reduce the energy consumption of the subsequent distillation process, and improve energy utilization efficiency, thereby realizing an efficient and energy-saving methanol production distillation process.

[0009] Optionally, the gas-liquid mass transfer component comprises: Tower plates, the number of which is not less than two, the tower plates being spaced apart along the axial direction of the distillation tank, the tower plates being arched, the arc sides of the tower plates being fixedly connected to the inner side walls of the distillation tank, and the chord length sides of two adjacent tower plates being in opposite directions, and the tower plates being provided with a plurality of air holes; Overflow plates, the number of which corresponds to the number of the tower plates, the overflow plates are slidably connected to the chord length side of the tower plates, and the lower end surface of one overflow plate and the upper end surface of an adjacent overflow plate are located on the same horizontal plane; Bubbles, the number of which corresponds to the number of the air holes, are located above the tower plate, and are used to increase the contact area between methanol gas and liquid.

[0010] By adopting the above technical solution, the tower plate layout enables the liquid to form a serpentine flow path on the tower plate, which increases the residence time and flow distance of the liquid on the tower plate and improves the adequacy of the gas-liquid contact. At the same time, the rising gas is dispersed into small airflows through the bubble cap and enters the liquid layer on the tower plate in the form of bubbles, which greatly increases the methanol gas-liquid contact area and improves the gas-liquid mass transfer efficiency and separation effect of the distillation process.

[0011] Optionally, the adjustment component includes: A sliding plate, wherein two sliding plates are provided, and the sliding plates are slidably mounted on the inner wall of the distillation tank, and the two sliding plates are respectively fixedly connected to all the overflow plates located in the same vertical plane; A connecting plate, the connecting plate is arranged in the distillation tank, and the two ends of the connecting plate are respectively fixedly connected to the two sliding plates; A support plate, the support plate is arranged parallel to the tower plate and is located below the tower plate, the support plate is connected to the bubble cap, a vent hole is provided on the support plate, and the support plate is fixedly connected to the overflow plate; A rack, the rack is vertically arranged and fixedly mounted on a connecting plate; A rotating rod, the rotating rod being passed through the distillation tank; A gear is coaxially fixedly mounted on the rotating rod, and the gear is meshed with the rack.

[0012] By adopting the above technical solution, when it is necessary to adjust the operating state of the gas-liquid mass transfer component, the operator can rotate the rotating rod to drive the gear to rotate. The rotation of the gear will cause the rack to move in the vertical direction. The movement of the rack will drive the sliding plate to slide on the inner wall of the distillation tank. The sliding plate can synchronously adjust the positions of all overflow plates, thereby flexibly changing the liquid layer height on the tower plate, effectively dealing with problems such as liquid accumulation and blockage on the tower plate or uneven gas-liquid distribution, and ensuring the stability of the gas-liquid mass transfer process.

[0013] At the same time, the change in the position of the overflow plate will drive the movement of the support plate, so that the relative position of the bubble can be fine-tuned to further optimize the gas-liquid contact state. The setting of the adjustment component enables the distillation device to quickly and flexibly adjust the operating state according to the actual working conditions, thereby improving the controllability and separation efficiency of the distillation process.

[0014] Optionally, the condensation component includes: A condensation tank, wherein the condensation tank is located above the rectification tank; A condenser, one end of which is connected to the gas phase port, a middle section of which is wound around the inside of the condenser tank, and one end of which is away from the gas phase port passes through the condenser tank; A cold water pipe, one end of which is connected to the bottom of the condensing tank, and one end of which is away from the condensing tank is connected to a cold water source; A water outlet pipe, one end of which is connected to the top of the condensation tank; A liquid return pipe, one end of which is connected to the upper end of the side wall of the distillation tank, and the other end of which is connected to an end of the condenser away from the gas phase port.

[0015] By adopting the above technical scheme, in the methanol distillation process, the high-temperature steam discharged from the gas phase port of the distillation tank enters the condenser through the condenser pipe, and the cold water pipe introduces the cold water source into the bottom of the condenser, and fully exchanges heat with the wound condenser pipe in the tank, quickly cools the high-temperature methanol steam in the pipe, and quickly condenses it into liquid. The condensed liquid flows out of the condenser along the condenser pipe, and a part of it returns to the distillation tank through the return pipe as reflux liquid to maintain the gas-liquid balance and mass transfer and heat transfer process in the tower, thereby ensuring the stability of the distillation effect, and the other part can be used as product output, and the outlet pipe is used to discharge the condensed water after heat exchange and temperature rise, thereby realizing the circulation of the condensing medium and ensuring the continuity and efficiency of the distillation process.

[0016] Optionally, the preheating component includes: A preheating tank, wherein the preheating tank is sleeved outside the rectification tank and a raw material port is provided at the bottom of the preheating tank; A surround pipe is arranged in the preheating tank, one end of the surround pipe is connected to the end of the water outlet pipe away from the condensing tank, the middle section of the surround pipe is arranged in the preheating tank, and the end of the surround pipe away from the water outlet pipe passes through the preheating tank.

[0017] By adopting the above technical scheme, during distillation, the raw material liquid enters the preheating tank from the raw material port, and the water that flows out of the condensing tank outlet pipe and is heated during the condensation process enters the surrounding pipe. The middle section of the surrounding pipe is arranged in a surrounding manner in the preheating tank, which greatly increases the heat exchange area, can make full use of the waste heat of the condensed water, and transfer the heat to the preheating tank. At the same time, the waste heat emitted in the distillation tank is also released in the preheating tank, so as to realize the preheating of the raw material and reduce the energy consumption required for additional heating of the raw material. The preheated raw material enters the distillation process and can reach the appropriate reaction temperature faster, speed up the distillation process, and improve the distillation efficiency. At the same time, the other end of the surrounding pipe passes through the preheating tank, which is convenient for the subsequent treatment or recycling of the hot water after use. Recycling the waste heat generated by the condensation process not only reduces energy consumption, but also improves the operating efficiency and economy of the distillation device.

[0018] Optionally, the blister comprises: A riser pipe, the riser pipe is fixedly mounted on the tower plate, and one end of the riser pipe is communicated with the air vent; A cover, wherein the cover is sleeved on the riser, and a gap exists between the cover and the riser; A support rod is inserted into the riser, one end of the support rod is fixedly connected to the cover, and one end of the support rod away from the cover is fixedly connected to the support plate.

[0019] By adopting the above technical solution, during the methanol distillation process, the gas can enter the bubble from below the tower plate through the riser, and be dispersed into the liquid layer around the cover through the gap, so as to fully contact with the liquid, thereby increasing the gas-liquid contact area and enhancing the gas-liquid mass transfer effect. The support rod plays a role in stabilizing the cover to ensure the stability of the bubble structure. Even when the gas flow and liquid flow are more complicated during the distillation process, the cover will not shake or shift easily, thereby ensuring that the gas-liquid mass transfer process can be carried out continuously and stably.

[0020] At the same time, when the regulating component adjusts the position of the overflow plate, the cover can be synchronously driven to perform fine adjustments through the support rod, thereby further optimizing the gas-liquid contact state, thereby improving the separation efficiency and operating stability of the distillation device.

[0021] Optionally, a plurality of bubble holes are formed on the cover, and the bubble holes are lower than the upper end surface of the riser pipe.

[0022] By adopting the above technical solution, the setting of the bubble hole can enable methanol gas to pass through the liquid layer in the form of small bubbles, increasing the contact area between the methanol gas and liquid phases, thereby improving the mass transfer efficiency. The bubble hole is set at a position lower than the upper end surface of the riser pipe, which can ensure that the liquid can form a certain liquid seal height in the bubble, avoiding the direct escape of gas without sufficient contact, and further improving the separation effect of the distillation process.

[0023] Optionally, a heat insulation board is provided between the distillation tank and the condensation tank, and the heat insulation board is fixedly mounted on the preheating tank.

[0024] By adopting the above technical solution, the insulation board can effectively reduce the heat transfer between the distillation tank and the condensation tank, avoid the low temperature generated during the condensation process from affecting the distillation process, and avoid the problem of heat transfer to the condensation tank causing the condensation effect to deteriorate, which is conducive to the smooth progress of the distillation process.

[0025] Optionally, a hand wheel is fixedly mounted on one end of the rotating rod away from the gear.

[0026] By adopting the above technical solution, the addition of the hand wheel enables the operator to manually rotate the rotating rod more conveniently, thereby improving the operating convenience of the device.

[0027] Optionally, a valve is installed on the liquid return pipe, and the valve is installed at one end of the liquid return pipe close to the distillation tank.

[0028] By adopting the above technical solution, the operator can accurately control the reflux volume, enhance the controllability of the device operation, thereby avoiding the problem of reduced distillation efficiency due to poor or excessive reflux, and facilitating the adjustment of process parameters according to the actual distillation process.

[0029] In summary, the present application includes at least one of the following beneficial technical effects: 1. The gas-liquid mass transfer components in the distillation tank can significantly improve the contact area and mass transfer efficiency of the methanol gas-liquid two phases through the design of tower plates, overflow plates and bubble caps, and effectively avoid the problem of liquid accumulation and blockage caused by traditional fixed structures; 2. The regulating component realizes dynamic control of the gas-liquid distribution state by flexibly adjusting the position of the overflow plate, thus improving the device's ability to cope with different working conditions; 3. The condensation component is combined with the preheating component to make full use of the waste heat in the condensation process to preheat the raw materials, reducing energy consumption and improving the energy efficiency of distillation. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the structure of a distillation device for green methanol production according to an embodiment of the present application; Figure 2 is a cross-sectional view of a distillation device for green methanol production according to an embodiment of the present application; Figure 3 This is an embodiment of the present application Figure 2 A local enlarged view of point A; Figure 4 This is a cross-sectional view of an embodiment of the present application for showing a sliding plate.

[0031] Description of reference numerals: 1. Distillation tank; 11. Liquid phase port; 12. Gas phase port; 2. Reboiler; 3. Gas-liquid mass transfer component; 31. Tower plate; 311. Air vent; 32. Overflow plate; 33. Bubble cap; 331. Riser; 332. Cover; 3321. Bubble cap hole; 333. Support rod; 4. Adjustment component; 41. Sliding plate; 42. Connecting plate; 43. Support plate; 431. Air vent; 44. Rack; 45. Rotating rod; 46. Gear; 5. Condensation component; 51. Condensation tank; 52. Condensation pipe; 53. Cold water pipe; 54. Water outlet pipe; 55. Liquid return pipe; 6. Preheating component; 61. Preheating tank; 611. Raw material port; 62. Surrounding pipe; 7. Insulation board; 8. Hand wheel; 9. Valve. DETAILED DESCRIPTION

[0032] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0033] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0034] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0035] The following is combined with Figure 1-4 This application is described in further detail.

[0036] The embodiment of the present application discloses a distillation device for green methanol production.

[0037] Reference Figure 1 and Figure 2 The distillation device for green methanol production includes a distillation tank 1, a reboiler 2, a gas-liquid mass transfer component 3, a regulating component 4, a condensing component 5 and a preheating component 6. The reboiler 2 is arranged at the bottom of the distillation tank 1 to provide gas for the distillation process, the gas-liquid mass transfer component 3 is installed in the distillation tank 1, and the gas-liquid mass transfer component 3 is used to make the methanol gas and liquid two phases fully contact to realize material exchange, the regulating component 4 is installed on the gas-liquid mass transfer component 3, and the regulating component 4 is used to adjust the operating state of the gas-liquid mass transfer component 3, the condensing component 5 is installed on the distillation tank 1, and the condensing component 5 is used to cool and condense the high-temperature methanol vapor into liquid, and the preheating component 6 is installed on the distillation tank 1, and the preheating component 6 is used to preheat the raw materials for distillation.

[0038] In the methanol distillation process, the raw material liquid to be distilled is first preheated by the preheating component 6 and then enters the distillation tank 1. The reboiler 2 heats the liquid at the bottom of the distillation tank 1, and the generated gas rises. The gas-liquid mass transfer component 3 in the distillation tank 1 promotes full contact between the gas and the liquid to achieve material exchange and complete the separation of the mixture. If the gas-liquid distribution is uneven during this period, the operating state of the gas-liquid mass transfer component 3 can be adjusted by the adjustment component 4. The high-temperature methanol vapor discharged from the top of the distillation tank 1 is cooled and condensed into liquid by the condensation component 5. Part of it is returned to the distillation tank 1 through the return pipe 55 as reflux liquid to maintain the gas-liquid balance and mass transfer and heat transfer in the tower, and part of it is output as a product. The whole process uses the coordinated operation of various components to achieve efficient and energy-saving distillation production of methanol.

[0039] Reference Figure 2 The distillation tank 1 is cylindrical and hollow inside. A liquid phase port 11 is provided on the upper end of the side wall of the distillation tank 1, and a gas phase port 12 is provided on the top wall of the distillation tank 1. The liquid inlet end of the reboiler 2 is connected to the bottom of the distillation tank 1, and the gas outlet end of the reboiler 2 is connected to the bottom side wall of the distillation tank 1. The specific use method or use principle of the reboiler 2 is common knowledge known to those skilled in the art, so it will not be specifically described in the embodiments of the present application.

[0040] Reference Figure 2 and Figure 3 The gas-liquid mass transfer component 3 includes a tower plate 31, an overflow plate 32 and a bubble cap 33. In the embodiment of the present application, four tower plates 31 are provided, and the number of tower plates 31 can be adaptively adjusted according to the purity requirements of the distillation product. The four tower plates 31 are arranged at intervals along the axial direction of the distillation tank 1. The tower plates 31 are arched and all the tower plates 31 are arranged horizontally. The arc side of the tower plate 31 is fixedly connected to the inner wall of the distillation tank 1, and the chord length sides of two adjacent tower plates 31 are in opposite directions, so that a liquid flow channel for the liquid to flow in a serpentine shape is formed in the distillation tank 1, and a plurality of air holes 311 are opened on the tower plate 31.

[0041] Reference Figure 2 and Figure 3 The overflow plates 32 are vertically arranged, and the number of overflow plates 32 corresponds to that of tower plates 31. The overflow plates 32 are slidably connected to the chord length side of the tower plates 31. The lower end surface of one overflow plate 32 and the upper end surface of the adjacent overflow plate 32 are located on the same horizontal plane. The number of bubble caps 33 corresponds to the number of air holes 311. The bubble caps 33 are located above the tower plates 31, and are used to increase the contact area between the gas and liquid phases of methanol.

[0042] Reference Figure 2 and Figure 3The bubble cap 33 includes a riser pipe 331, a cover 332 and a support rod 333. The riser pipe 331 is vertically arranged and fixedly mounted on the upper surface of the tower plate 31. One end of the riser pipe 331 is connected to the air vent 311. The cover 332 is an inverted barrel-shaped structure. The cover 332 is sleeved on the riser pipe 331. There is a gap between the cover 332 and the riser pipe 331. A plurality of bubble cap holes 3321 are provided on the cover 332. The bubble cap holes 3321 are provided at a position lower than the upper end surface of the riser pipe 331. The support rod 333 is vertically penetrated in the riser pipe 331. One end of the support rod 333 is fixedly connected to the center of the cover 332. The end of the support rod 333 away from the cover 332 is connected to the adjustment component 4.

[0043] In the methanol distillation process, the raw material to be distilled enters the distillation tank 1 from the liquid phase port 11, and the raw material flows from the top tower plate 31 in a serpentine shape through each tower plate 31 in turn, and finally flows to the bottom of the distillation tank 1. The reboiler 2 obtains liquid from the bottom of the distillation tank 1, and the gas generated after treatment enters the bottom of the distillation tank 1 from the gas outlet end of the reboiler 2. The liquid flows on the tower plate 31, and the overflow plate 32 maintains the liquid level. The gas generated by the reboiler 2 enters the bubble cap 33 through the air hole 311 of the tower plate 31, passes through the riser 331, and through the gap between the cover 332 and the riser 331, and is dispersed into the liquid layer from the bubble cap hole 3321 on the cover 332, thereby increasing the gas-liquid contact area and realizing material exchange. The volatile components are enriched at the top of the tower and the non-volatile components are gathered at the bottom of the tower. Finally, the gas phase is discharged from the gas phase port 12 on the top wall of the distillation tank 1 and enters the subsequent treatment process.

[0044] Reference Figure 2 and Figure 4 The adjusting assembly 4 includes a sliding plate 41, a connecting plate 42, a supporting plate 43, a rack 44, a rotating rod 45 and a gear 46. Two sliding plates 41 are provided, and the sliding plates 41 are slidably mounted on the inner wall of the distillation tank 1. The sliding plates 41 are embedded in the inner wall of the distillation tank 1. The two sliding plates 41 are respectively fixedly connected to all the overflow plates 32 located in the same vertical plane. The connecting plate 42 is horizontally arranged in the distillation tank 1, and the two ends of the connecting plate 42 are respectively fixedly connected to the bottom of the two sliding plates 41.

[0045] Reference Figure 2 and Figure 4 The support plate 43 is consistent with the shape of the tower plate 31, the support plate 43 is arranged parallel to the tower plate 31 and is located below the tower plate 31, the support plate 43 is fixedly connected to the end of the support rod 333 away from the bubble cap 33, a vent hole 431 is opened on the support plate 43, the support plate 43 is fixedly connected to the overflow plate 32, the rack 44 is vertically arranged, the rack 44 is fixedly installed on the connecting plate 42, the rotating rod 45 is horizontally penetrated on the distillation tank 1, the gear 46 is coaxially fixedly installed on the rotating rod 45, and a hand wheel 8 is fixedly installed on the end of the rotating rod 45 away from the gear 46, and the gear 46 is meshed with the rack 44.

[0046] During the methanol distillation process, when it is necessary to adjust the operating state of the gas-liquid mass transfer component 3, the operator rotates the hand wheel 8 to rotate the rotating rod 45, and the rotating rod 45 rotates to drive the gear 46 to rotate synchronously, and the gear 46 rotates to drive the rack 44 to move in the vertical direction. The two ends of the connecting plate 42 are connected to the bottom of two sliding plates 41 embedded in the inner wall of the distillation tank 1 and slidable. Therefore, the movement of the rack 44 drives the connecting plate 42, and the connecting plate 42 drives the two sliding plates 41 to slide on the inner wall of the distillation tank 1, thereby changing the position of the overflow plate 32 and adjusting the height of the liquid layer on the tower plate 31. At the same time, the support plate 43 is connected to the overflow plate 32, and the position of the overflow plate 32 changes. The support plate 43 drives the support rod 333, thereby adjusting the position of the bubble cap 33, optimizing the gas-liquid contact state, ensuring the efficiency and stability of the distillation process, and realizing the effective adjustment of the operating state of the gas-liquid mass transfer component 3.

[0047] Reference Figure 2 The condensation assembly 5 includes a condensation tank 51 , a condensation pipe 52 , a cold water pipe 53 , a water outlet pipe 54 and a liquid return pipe 55 . The condenser 51 is located above the distillation tank 1, one end of the condenser 52 is connected to the gas phase port 12, and the middle section of the condenser 52 is wound inside the condenser 51. The specific winding method and cooling principle of the condenser 52 are common knowledge known to people in this field, so they are not described in detail in the embodiment of the present application. The condenser 52 passes through the condenser 51 at one end away from the gas phase port 12, one end of the cold water pipe 53 is connected to the bottom of the condenser 51, and the end of the cold water pipe 53 away from the condenser 51 is connected to a cold water source, one end of the water outlet pipe 54 is connected to the top of the condenser 51, and the other end of the water outlet pipe 54 is connected to the preheating component 6, one end of the return liquid pipe 55 is connected to the upper end of the side wall of the distillation tank 1, and the other end of the return liquid pipe 55 is connected to the end of the condenser 52 away from the gas phase port 12, and a valve 9 is installed on the return liquid pipe 55, and the valve 9 is installed at the end of the return liquid pipe 55 close to the distillation tank 1.

[0048] During the methanol distillation process, the high-temperature methanol vapor discharged from the gas phase port 12 enters the condensation component 5 through the condenser 52, and the vapor flows along the condenser 52. At this time, the cold water pipe 53 introduces a cold water source from the bottom of the condenser tank 51. The cold water fully exchanges heat with the wound condenser tube 52 in the condenser tank 51, and the high-temperature methanol vapor in the cooling tube is quickly condensed into liquid. A part of the condensed methanol liquid continues to flow through the condenser tube 52, and then returns to the distillation tank 1 through the return pipe 55 to participate in the distillation process as a reflux liquid. The operator can adjust the opening of the valve 9 as needed to accurately control the reflux amount and maintain the gas-liquid balance and mass transfer and heat transfer in the tower. The other part is output as a product.

[0049] Reference Figure 2The preheating assembly 6 includes a preheating tank 61 and a surrounding pipe 62. The preheating tank 61 is sleeved outside the distillation tank 1 and the condensation pipe 52, and a heat insulation board 7 is arranged between the distillation tank 1 and the condensation tank 51. The heat insulation board 7 is fixedly installed on the preheating tank 61. A raw material port 611 is opened at the bottom of the preheating tank 61. The surrounding pipe 62 is arranged in the preheating tank 61, and one end of the surrounding pipe 62 is connected with the end of the water outlet pipe 54 away from the condensation tank 51. The middle section of the surrounding pipe 62 is wound in the preheating tank 61, and the end of the surrounding pipe 62 away from the water outlet pipe 54 passes through the preheating tank 61.

[0050] During the methanol distillation process, the water from the water outlet pipe 54 at the top of the condensation component 5 has a higher temperature due to the completion of the condensation task, flows into the surrounding pipe 62, and is introduced into the preheating tank 61. With the heat conduction characteristics, it continuously releases heat to the raw material liquid in the preheating tank 61. The raw material liquid to be distilled enters from the raw material port 611 at the bottom of the preheating tank 61. During the flow in the preheating tank 61, it continuously absorbs the heat emitted by the surrounding pipe 62. At the same time, the waste heat emitted in the distillation tank 1 is also released in the preheating tank 61, thereby achieving temperature rise and preheating, and realizing the effective use of energy. The heat insulation board 7 effectively prevents the mutual interference between the high temperature in the distillation tank 1 and the low temperature in the condensation tank 51, and maintains the temperature stability of each area.

[0051] The implementation principle of a distillation device for green methanol production in an embodiment of the present application is as follows: the raw material to be distilled enters the preheating tank 61 through the raw material port 611 at the bottom of the preheating tank 61, is first preheated by hot water from the condensation component 5 in the surrounding pipe 62, and then enters the distillation tank 1 from the liquid phase port 11 after the temperature is increased.

[0052] The reboiler 2 obtains liquid from the bottom of the distillation tank 1, heats it to generate gas, and returns it to the distillation tank 1 from the bottom. The four tower plates 31 form a liquid serpentine flow channel, and the overflow plate 32 maintains the liquid level of the tower plate 31. The gas enters the bubble cap 33 through the air permeable hole 311 of the tower plate 31, and is dispersed into the liquid layer through the gap between the riser 331 and the cover 332 and the bubble cap hole 3321, so as to achieve sufficient gas-liquid mass transfer, and the volatile methanol component is enriched at the top of the tower. When the gas-liquid mass transfer is abnormal, such as uneven gas-liquid distribution, the rotating rod 45 is rotated to drive the gear 46 and the rack 44 to move, so that the sliding plate 41 slides, and the positions of the overflow plate 32 and the bubble cap 33 are adjusted to optimize the mass transfer effect.

[0053] The high-temperature methanol vapor discharged from the gas phase port 12 is cooled and condensed by the cold water introduced by the cold water pipe 53 in the condenser 51 through the condenser 52. Part of the liquid returns to the distillation tank 1 through the return pipe 55 with the reflux amount controlled by the valve 9 to maintain the gas-liquid balance, and part of it is output as the product. The heated cold water flows into the preheating component 6 to preheat the raw materials, thereby realizing the effective utilization of energy and finally completing the distillation production of methanol, thereby achieving the effect of improving the distillation efficiency while reducing energy consumption.

[0054] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A distillation device for green methanol production, characterized in that: include: A distillation tank (1), wherein a liquid phase port (11) is provided on the upper end of a side wall of the distillation tank (1), and a gas phase port (12) is provided on the top wall of the distillation tank (1); A reboiler (2), wherein a liquid inlet end of the reboiler (2) is connected to the bottom of the distillation tank (1), and a gas outlet end of the reboiler (2) is connected to the bottom side wall of the distillation tank (1); A gas-liquid mass transfer component (3), the gas-liquid mass transfer component (3) being installed in the distillation tank (1), the gas-liquid mass transfer component (3) being used to enable methanol gas and liquid phases to fully contact each other to achieve material exchange; an adjusting component (4), the adjusting component (4) being mounted on the gas-liquid mass transfer component (3), the adjusting component (4) being used to adjust the operating state of the gas-liquid mass transfer component (3); A condensation component (5), the condensation component (5) being installed on the distillation tank (1), and the condensation component (5) being used to cool and condense high-temperature methanol vapor into liquid; A preheating component (6), wherein the preheating component (6) is installed on the distillation tank (1), and the preheating component (6) is used to preheat the raw materials for distillation.

2. The distillation device for green methanol production according to claim 1, characterized in that: The gas-liquid mass transfer component (3) comprises: Tower plates (31), the number of the tower plates (31) being no less than two, the tower plates (31) being spaced apart along the axial direction of the distillation tank (1), the tower plates (31) being arched, the arc side of the tower plates (31) being fixedly connected to the inner side wall of the distillation tank (1), and the chord length sides of two adjacent tower plates (31) being in opposite directions, and the tower plates (31) being provided with a plurality of air holes (311); Overflow plates (32), the number of the overflow plates (32) corresponding to the number of the tower plates (31), the overflow plates (32) being slidably connected to the chord length side of the tower plates (31), wherein the lower end surface of one overflow plate (32) and the upper end surface of an adjacent overflow plate (32) are located on the same horizontal plane; Bubbles (33), the number of the bubbles (33) corresponding to the number of the air holes (311), the bubbles (33) being located above the tower plate (31), and the bubbles (33) being used to increase the methanol gas-liquid contact area.

3. The distillation device for green methanol production according to claim 2, characterized in that: The regulating component (4) comprises: A sliding plate (41), wherein two sliding plates (41) are provided, and wherein the sliding plates (41) are slidably mounted on the inner wall of the rectification tank (1), and the two sliding plates (41) are respectively fixedly connected to all the overflow plates (32) located on the same vertical plane; A connecting plate (42), the connecting plate (42) being arranged in the distillation tank (1), and the two ends of the connecting plate (42) being fixedly connected to the two sliding plates (41) respectively; a support plate (43), the support plate (43) being arranged parallel to the tower plate (31) and being located below the tower plate (31), the support plate (43) being connected to the bubble cap (33), a vent hole (431) being provided on the support plate (43), and the support plate (43) being fixedly connected to the overflow plate (32); A rack (44), the rack (44) being arranged vertically, and the rack (44) being fixedly mounted on the connecting plate (42); A rotating rod (45), the rotating rod (45) being inserted through the distillation tank (1); A gear (46), the gear (46) being coaxially fixedly mounted on the rotating rod (45), and the gear (46) being meshed with the rack (44).

4. The distillation device for green methanol production according to claim 1, characterized in that: The condensation component (5) comprises: A condensation tank (51), wherein the condensation tank (51) is located above the distillation tank (1); A condenser pipe (52), one end of the condenser pipe (52) being in communication with the gas phase port (12), a middle section of the condenser pipe (52) being wound around the interior of the condenser tank (51), and an end of the condenser pipe (52) away from the gas phase port (12) passing through the condenser tank (51); a cold water pipe (53), one end of the cold water pipe (53) being in communication with the bottom of the condensing tank (51), and one end of the cold water pipe (53) being away from the condensing tank (51) being connected to a cold water source; a water outlet pipe (54), one end of the water outlet pipe (54) being in communication with the top of the condensation tank (51); A liquid return pipe (55), one end of which is in communication with the upper end of the side wall of the rectification tank (1), and the other end of which is in communication with an end of the condenser pipe (52) away from the gas phase port (12).

5. The distillation device for green methanol production according to claim 4, characterized in that: The preheating component (6) comprises: A preheating tank (61), wherein the preheating tank (61) is sleeved outside the distillation tank (1), and a raw material inlet (611) is provided at the bottom of the preheating tank (61); A surrounding pipe (62), wherein the surrounding pipe (62) is arranged in the preheating tank (61), one end of the surrounding pipe (62) is connected to an end of the water outlet pipe (54) away from the condensing tank (51), a middle section of the surrounding pipe (62) is arranged around the preheating tank (61), and an end of the surrounding pipe (62) away from the water outlet pipe (54) passes through the preheating tank (61).

6. The distillation device for green methanol production according to claim 3, characterized in that: The blister (33) comprises: A riser pipe (331), the riser pipe (331) being fixedly mounted on the tower plate (31), and one end of the riser pipe (331) being in communication with the air vent (311); A cover (332), the cover (332) being sleeved on the riser (331), with a gap existing between the cover (332) and the riser (331); A support rod (333), the support rod (333) being inserted into the riser (331), one end of the support rod (333) being fixedly connected to the cover (332), and one end of the support rod (333) being away from the cover (332) being fixedly connected to the support plate (43).

7. The distillation device for green methanol production according to claim 6, characterized in that: The cover (332) is provided with a plurality of bubble holes (3321), and the bubble holes (3321) are lower than the upper end surface of the riser pipe (331).

8. The distillation device for green methanol production according to claim 5, characterized in that: A heat insulation board (7) is provided between the distillation tank (1) and the condensation tank (51), and the heat insulation board (7) is fixedly mounted on the preheating tank (61).

9. The distillation device for green methanol production according to claim 3, characterized in that: A hand wheel (8) is fixedly mounted on one end of the rotating rod (45) away from the gear (46).

10. The distillation device for green methanol production according to claim 4, characterized in that: The liquid return pipe (55) is provided with a valve (9), and the valve (9) is installed at one end of the liquid return pipe (55) close to the distillation tank (1).

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