A distillation device for producing methylcyclohexanediamine

Abstract

The present invention belongs to the technical field of distillation and extraction, and in particular relates to a distillation device for producing methylcyclohexanediamine, which comprises a shell, a distillation plate and a telescopic cylinder; the shell is cylindrical and vertically arranged; the outer edge of the distillation plate is fixedly connected to the inner wall of the shell, the upper surface of the distillation plate can accumulate a mixed liquid, a plurality of exhaust sleeves are evenly penetrated on the distillation plate, the thickness of the exhaust sleeve is greater than the thickness of the distillation plate, and a steam through hole is opened in the exhaust sleeve along the axial direction; the distillation plate and the exhaust sleeve are made of flexible material; the telescopic cylinder can be telescopic, and the telescopic cylinder can drive the distillation plate to convex or concave when it is extended and retracted, and the deformation of the distillation plate drives the deformation of the exhaust sleeve, thereby changing the size of the steam through hole, loosening impurities blocked in the steam through hole and falling, thereby avoiding the blockage of the steam through hole and reducing the distillation efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of distillation and storage, and in particular relates to a distillation device for producing methylcyclohexanediamine. Background Art

[0002] Methylcyclohexanediamine is an organic compound belonging to the alicyclic diamine class of epoxy curing agents. It can be used alone or mixed with other common epoxy curing agents or general-purpose accelerators. It is suitable for composite materials, coatings, adhesives, and flooring applications. Methylcyclohexanediamine has a wide range of applications. Its production requires a distillation unit, which extracts and distills the methylcyclohexanediamine.

[0003] Distillation is a separation process that utilizes the varying volatility of components in a mixture to separate them. A commonly used device is a plate-type distillation tower. In a distillation tower, the gas and liquid phases come into countercurrent contact, allowing for interphase heat and mass transfer. The volatile components in the liquid phase enter the vapor phase, while the less volatile components in the vapor phase enter the liquid phase. This results in nearly pure volatile components at the top of the tower and nearly pure less volatile components at the bottom.

[0004] In the prior art, for example, Chinese patent CN116077969A discloses a multi-stage chemical distillation tower comprising a lower tower body, an upper tower body being slidably sealed above the interior of the lower tower body, and a water guide plate disposed within the lower tower body. The water guide plate has steam holes formed therein, through which steam can enter the upper tower body. However, the water guide plate lacks a cleaning device to clean the steam holes. If the steam holes become clogged with debris during use, this can affect airflow in the tower body and the distillation effect. Summary of the Invention

[0005] Based on this, it is necessary to provide a distillation device for producing methylcyclohexanediamine to address the problem that the current distillation device cannot clean the debris in the distillation hole, thereby causing the distillation hole to be blocked and affecting the distillation efficiency.

[0006] The above purpose is achieved through the following technical solutions:

[0007] A distillation device for producing methylcyclohexanediamine comprises a shell, a distillation plate and a telescopic cylinder; the shell is cylindrical and vertically arranged, a steam inlet and a mixed liquid inlet are provided at the lower end of the shell, and a liquid outlet is provided at the upper end of the shell; the outer edge of the distillation plate is fixedly connected to the inner wall of the shell, the upper surface of the distillation plate can accumulate the mixed liquid, a plurality of exhaust sleeves are evenly penetrated on the distillation plate, the thickness of the exhaust sleeves is greater than the thickness of the distillation plate, and a steam through hole is opened in the exhaust sleeve along the axial direction; the distillation plate and the exhaust sleeve are made of flexible material; the telescopic cylinder can be telescopic, the telescopic cylinder is fixedly connected to the inner wall of the shell and is arranged below the distillation plate, and the telescopic cylinder can drive the distillation plate to convex or concave when it is extended and retracted; the exhaust sleeve is fixedly connected to the distillation plate, and the convexity or concaveness of the distillation plate drives the exhaust sleeve to deform; the convexity of the distillation plate increases the upper end diameter of the steam through hole and reduces the lower end diameter; the concaveness of the distillation plate reduces the upper end diameter of the steam through hole and increases the lower end diameter; the telescopic cylinder can continuously extend and retract to change the size of the steam through hole in the exhaust sleeve to prevent impurities from clogging the steam through hole.

[0008] Furthermore, multiple distillation plates are provided, and all the distillation plates are horizontally fixed to the inner wall of the shell in sequence from top to bottom; multiple telescopic cylinders are provided under each distillation plate; the distillation plate has a first working state, a second working state, a third working state and a fourth working state; initially, the distillation plate is in the first working state, and the surface of the distillation plate is horizontal; in the second working state, the telescopic cylinder extends to drive the distillation plate convex; in the third working state, the telescopic cylinder shortens to drive the distillation plate concave; the surface of the distillation plate is divided into multiple adjacent sub-areas, and a telescopic cylinder is installed under each sub-area, and the telescopic cylinder can make the corresponding sub-area convex or concave, so that a single sub-area switches to different working states; when the distillation plate is in the fourth working state, the telescopic cylinder makes each sub-area alternately switch to different working states, and the telescopic cylinder makes adjacent sub-areas on the distillation plate be in different working states.

[0009] Furthermore, the sub-region is a rectangular region, and the length direction of the sub-region is arranged along the radial direction of the shell. A connecting block is fixedly connected to the bottom of each sub-region, and a connecting rod is fixedly connected to the bottom of the connecting block. The connecting rod is arranged along the length direction of the sub-region, and the two ends of the connecting rod are respectively connected to a telescopic cylinder; the telescopic cylinder drives the connecting rod to move up and down, and the up and down movement of the connecting rod drives the connecting block to move up and down, and the up and down movement of the connecting block drives the corresponding sub-region to switch to different working states.

[0010] Furthermore, a cooler is provided on the outer wall of the shell, one end of the cooler is connected to the upper end of the shell, and the other end of the cooler is connected to the lower end of the shell; the mixed liquid inside the lower end of the shell enters the cooler through the lower end of the shell, and after entering the cooler, the mixed liquid enters the interior of the shell from the upper end of the shell, so that the mixed liquid passes through each distillation plate in sequence from top to bottom.

[0011] Furthermore, a half-moon-shaped notch is opened on the distillation plate, and the inner wall of the notch and the inner wall of the shell form a fluid channel through which the mixed liquid and steam can pass, and the fluid channels between adjacent distillation plates are located on different vertical planes; an upper baffle and a lower baffle are vertically provided on the inner wall of the fluid channel close to the distillation plate; the upper baffle extends upward along the inner wall of the fluid channel, and the upper baffle, the upper surface of the distillation plate and the inner wall of the shell form a liquid evaporation chamber, and the mixed liquid flowing down from the upper end of the shell can fill each liquid evaporation chamber in turn from top to bottom; the lower baffle extends downward along the inner wall of the fluid channel; in the two adjacent distillation plates above and below, the height of the lower end of the lower baffle of the upper distillation plate is lower than the height of the upper end of the upper baffle of the lower distillation plate.

[0012] Furthermore, the baffle is arranged at a position closer to the axis of the shell relative to the lower baffle, so that a step surface is formed between the upper baffle and the lower baffle on the same distillation plate. When the liquid in the liquid evaporation chamber flows out, it flows through the step surface. The step surface has an obstructive effect on the flow of the mixed liquid, thereby reducing the impact of the mixed liquid on the distillation plate below.

[0013] Furthermore, a support plate group is provided in the steam through hole, which is composed of a plurality of diamond-shaped plates. The diamond-shaped plates are connected end to end to form a ring and fixed to the inner wall of the steam through hole to support the inner wall of the steam through hole; the diamond-shaped plates are made of flexible material.

[0014] Preferably, a support frame group is provided in the steam through hole, and the support frame group consists of a plurality of diamond-shaped frames, which are connected end to end to form a ring and fixed to the inner wall of the steam through hole to support the inner wall of the steam through hole; the diamond-shaped frames are made of flexible material.

[0015] Furthermore, a protruding block is fixedly connected to the interior of the shell, and the telescopic cylinder is fixedly connected to the protruding block.

[0016] Furthermore, the upper end of the shell has a cooling function, and the lower end of the shell is provided with a heating source for heating the mixed liquid; a condensation tank is provided on the inside of the upper end of the shell, and the condensation tank is fixedly connected to the inner wall of the upper end of the shell; a liquid outlet inclined plate is provided on the upper end of the shell below the condensation tank, and the liquid outlet inclined plate is inclined and fixedly connected to the liquid outlet; after the steam contacts the inner wall of the upper end of the shell, it is cooled and liquefied and flows to the condensation tank, and the liquid in the condensation tank flows into the liquid outlet through the liquid outlet inclined plate and is discharged from the shell through the liquid outlet.

[0017] The beneficial effects of the present invention are:

[0018] 1. The telescopic vibration of the telescopic cylinder drives the distillation plate to deform upward or downward. The deformation of the distillation plate drives the deformation of the exhaust sleeve, which in turn changes the size of the steam through hole. Impurities blocked in the steam through hole are loosened and fall off, avoiding blockage of the steam through hole and reducing the distillation efficiency.

[0019] 2. The telescopic vibration of the telescopic cylinder drives the distillation plate to switch to different working states to adjust the flow rate of steam or clean impurities in the steam through-holes.

[0020] 3. In the two adjacent distillation plates above and below, the height of the lowest end of the lower baffle of the upper distillation plate is lower than the height of the highest end of the upper baffle of the lower distillation plate, so that the liquid level of the mixed liquid in the lower liquid evaporation chamber is higher than the lowest end of the upper baffle, thereby forming a liquid seal between the two adjacent liquid evaporation chambers above and below. Steam can only flow upward through the steam through holes of the exhaust sleeve, thereby increasing the contact area between the steam and the mixed liquid, improving the vaporization efficiency of the mixed liquid, and thus improving the distillation efficiency.

[0021] 4. A step surface is formed between the upper baffle and the lower baffle. The step surface has an obstructive effect on the downward flow of the mixed liquid, thereby reducing the impact of the mixed liquid on the distillation plate below, reducing the uncontrollable deformation and vibration of the distillation plate, and realizing refined control of different working states of the distillation plate.

[0022] 5. A support frame group is provided in the steam through hole to support the inner wall of the steam through hole. When the distillation plate switches between different working states, the support frame group can prevent the steam through hole from deforming and closing, which affects the steam passing efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 Schematic diagram of the three-dimensional structure of the distillation device for producing methylcyclohexanediamine of the present invention;

[0024] Figure 2 A sectional view of a distillation apparatus for producing methylcyclohexanediamine according to the present invention from a three-dimensional perspective;

[0025] Figure 3 A cross-sectional view of a rectification apparatus for producing methylcyclohexanediamine according to the present invention;

[0026] Figure 4 This is a schematic diagram of a three-dimensional structure of a partial structure of a distillation device for producing methylcyclohexanediamine according to the present invention, including structures such as a distillation plate, an exhaust sleeve, a telescopic cylinder, and a connecting rod;

[0027] Figure 5 for Figure 4 Bottom view of

[0028] Figure 6 for Figure 5 Cross-sectional view along the AA axis;

[0029] Figure 7 This is a schematic diagram of a three-dimensional structure of a partial structure of a distillation device for producing methylcyclohexanediamine of the present invention, including a distillation plate, an exhaust sleeve, an upper baffle, a lower baffle, and a telescopic cylinder;

[0030] Figure 8for Figure 7 A partial enlarged view of point B in the middle, including the support frame assembly;

[0031] Figure 9 A sectional view from a three-dimensional perspective of a shell of a rectification apparatus for producing methylcyclohexanediamine according to the present invention;

[0032] in:

[0033] 100, shell; 110, steam inlet; 120, mixed liquid inlet; 130, liquid outlet;

[0034] 200, distillation plate; 210, exhaust sleeve; 220, steam through hole; 230, support frame assembly;

[0035] 300, fluid channel; 310, upper baffle; 320, lower baffle; 330, liquid evaporation chamber;

[0036] 400, telescopic cylinder; 410, connecting block; 420, connecting rod;

[0037] 500, raised block; 510, condensation tank; 520, liquid outlet inclined plate; 530, cooler; 540, heating source. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0039] The serial numbers of the components herein, such as "first", "second", etc., are only used to distinguish the objects described and do not have any order or technical meaning. The "connection" and "coupling" mentioned in this application, unless otherwise specified, include direct and indirect connections (couplings). In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc. are based on the orientation or positional relationship 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.

[0040] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0041] Refer to the following Figures 1 to 9 The present invention provides a distillation device for producing methylcyclohexanediamine.

[0042] A distillation device for producing methylcyclohexanediamine includes a shell 100, a distillation plate 200, and a telescopic cylinder 400. The shell 100 is cylindrical and vertically arranged. A steam inlet 110 and a mixed liquid inlet 120 are provided at the lower end of the shell 100, and a liquid outlet 130 is provided at the upper end of the shell 100. External steam enters the interior of the shell 100 through the steam inlet 110, and external mixed liquid enters the interior of the shell 100 through the mixed liquid inlet 120. The distilled liquid is discharged from the shell 100 through the liquid outlet 130.

[0043] The outer edge of the distillation plate 200 is fixed to the inner wall of the shell 100. The upper surface of the distillation plate 200 can accumulate the mixed liquid. The distillation plate 200 is evenly penetrated by multiple exhaust sleeves 210. The thickness of the exhaust sleeves 210 is greater than that of the distillation plate 200. Steam holes 220 are provided in the exhaust sleeves 210 along the axial direction. The distillation plate 200 and the exhaust sleeves 210 are made of flexible materials. The telescopic cylinder 400 is capable of extension and contraction. The telescopic cylinder 400 is fixed to the inner wall of the shell 100 and is arranged below the distillation plate 200. The telescopic cylinder 400 can extend and retract to drive the distillation plate 200 to convex or concave; the exhaust sleeve 210 is fixed on the distillation plate 200, and the convexity or concaveness of the distillation plate 200 drives the exhaust sleeve 210 to deform; the convexity of the distillation plate 200 increases the upper end diameter of the steam through hole 220 and decreases the lower end diameter; the concaveness of the distillation plate 200 causes the upper end diameter of the steam through hole 220 to decrease and the lower end diameter to increase; the telescopic cylinder 400 can continuously vibrate to change the size of the steam through hole 220 in the exhaust sleeve 210 to prevent the steam through hole 220 from being blocked.

[0044] Specifically, the mixed liquid is a mixture of light and heavy components. The mixed liquid vaporizes and evaporates on the distillation plate 200. As steam flows from the bottom of the shell 100 to the top, it passes through the steam holes 220 of the exhaust sleeve 210, heating the mixed liquid. The vaporized light components condense into liquid at the top of the shell 100 and are discharged through the liquid outlet 130.

[0045] The outer edges of the distillation plates 200 are fixed to the inner wall of the housing 100. Therefore, when the telescopic cylinder 400 extends to push the distillation plates 200, the edges of the distillation plates 200 remain stationary. The telescopic cylinder 400 can be gas-driven, hydraulically driven, or electromagnetically driven.

[0046] When the steam through hole 220 is clogged with debris, the flow of steam from the lower end of the shell 100 to the upper end of the shell 100 is blocked, the evaporation efficiency of the light component is reduced, and the distillation efficiency is reduced. The telescopic cylinder 400 is activated, and the telescopic cylinder 400 is continuously extended and retracted, driving the distillation plate 200 to convex and concave, thereby creating a vibration effect on the distillation plate 200. Specifically, the distillation plate 200 is made of a flexible material. The extension of the telescopic cylinder 400 can drive the distillation plate 200 to convex, and the contraction of the telescopic cylinder 400 can drive the distillation plate 200 to concave. The exhaust sleeve 210 is made of a flexible material and is fixed to the distillation plate 200. The upward or downward movement of the distillation plate 200 can cause the upper and lower openings of the exhaust sleeve 210 to deform, thereby changing the size of the steam through hole 220, loosening and dropping impurities blocked in the steam through hole 220, and thus clearing the steam through hole 220, thereby avoiding the reduction in distillation efficiency due to the blockage of the steam through hole 220.

[0047] In the process of external steam flowing from the bottom of the shell 100 to the top of the shell 100, the steam through the steam through hole 220 of the exhaust sleeve 210 from bottom to top heats the mixed liquid. When the steam flow rate is too large, the steam passing through the exhaust sleeve 210 will cause the mixed liquid to splash. The steam flow rate can be adjusted by the size of the steam through hole 220. Specifically, when the telescopic cylinder 400 is extended, the diameter of the upper end of the steam through hole 220 is increased and the diameter of the lower end is reduced, so that the steam through hole 220 is deformed into a funnel-shaped through hole with a large diameter at the upper end and a small diameter at the lower end. The steam first passes through the lower end of the steam through hole 220 and then passes through the lower end of the steam through hole 220. When the diameter of the upper end of the steam through hole 220 and the lower end of the steam through hole 220 are reduced, the speed of the steam can be reduced; when the flow rate of the steam is low, the mixed liquid on the distillation plate 200 can easily flow to the bottom of the distillation plate 200 through the steam through hole 220, and the telescopic cylinder 400 is shortened to drive the distillation plate 200 to concave, and the concave distillation plate 200 drives the exhaust sleeve 210 to deform, so that the upper end diameter of the steam through hole 220 is reduced and the lower end diameter is increased, so that the steam through hole 220 is deformed into an inverted funnel-shaped through hole with a small upper end diameter and a large lower end diameter, and the discharge speed increases when the steam is discharged from the upper end of the steam through hole 220.

[0048] A plurality of distillation plates 200 are provided, all of which are horizontally fixed to the inner wall of the shell 100 in sequence. A plurality of telescopic cylinders 400 are disposed below each distillation plate 200. The distillation plates 200 have first, second, third, and fourth operating states. Initially, the distillation plates 200 are in the first operating state, with the surface of the distillation plates 200 being horizontal. In the second operating state, the telescopic cylinders 400 extend, causing the distillation plates 200 to convex. In the third operating state, the telescopic cylinders 400 contract, causing the distillation plates 200 to concave. The surface of the distillation plates 200 is divided into a plurality of adjacent sub-regions, each of which is provided with a telescopic cylinder 400. The telescopic cylinders 400 can cause the corresponding sub-region to convex or concave, thereby switching the individual sub-regions between different operating states. In the fourth operating state, the telescopic cylinders 400 cause each sub-region to alternately switch between different operating states, and the telescopic cylinders 400 also cause adjacent sub-regions on the distillation plates 200 to be in different operating states.

[0049] Specifically, initially, the distillation plate 200 is in the first working state; when the steam flow rate is too large, the telescopic cylinder 400 extends, causing the distillation plate 200 to convex as a whole, so that the distillation plate 200 as a whole switches to the second working state to reduce the steam flow rate; when the steam flow rate is low, the telescopic cylinder 400 shortens, causing the distillation plate 200 to concave as a whole, so that the distillation plate 200 as a whole switches to the third working state to increase the steam flow rate; when impurities block the steam through hole 220, the telescopic vibration of the telescopic cylinder 400 is adjusted to switch the distillation plate 200 to the fourth working state.

[0050] If the steam flow rate is too high, the mixed liquid will splash, and if the steam flow rate is too low, the mixed liquid will flow into the steam through hole 220. The definition standard of whether the steam flow rate is too high or too low can be determined through actual engineering application.

[0051] The sub-regions are rectangular regions, and the length direction of the sub-regions is arranged along the radial direction of the shell 100. A connecting block 410 is fixedly connected to the bottom of each sub-region, and a connecting rod 420 is fixedly connected to the bottom of the connecting block 410. The connecting rod 420 is arranged along the length direction of the sub-region, and a telescopic cylinder 400 is connected to each end of the connecting rod 420. The telescopic cylinder 400 is telescoped to drive the connecting rod 420 to move up and down, and the up and down movement of the connecting rod 420 drives the connecting block 410 to move up and down. The up and down movement of the connecting block 410 drives the corresponding sub-region to switch to different working states.

[0052] A cooler 530 is provided on the outer wall of the shell 100, one end of the cooler 530 is connected to the upper end of the shell 100, and the other end of the cooler 530 is connected to the lower end of the shell 100; the mixed liquid inside the lower end of the shell 100 enters the cooler 530 through the lower end of the shell 100, and after entering the cooler 530, the mixed liquid enters the shell 100 from the upper end, so that the mixed liquid passes through each distillation plate 200 in sequence from top to bottom.

[0053] In detail, steam is introduced to increase the pressure of the shell 100 , and the mixed liquid is pressed into the cooler 530 from the lower end of the shell 100 . The cooler 530 cools the mixed liquid, and the cooled mixed liquid is discharged into the shell 100 .

[0054] A crescent-shaped notch is formed on the distillation plate 200. The inner wall of the notch and the inner wall of the shell 100 form a fluid channel 300 through which the mixed liquid and steam can pass. The fluid channels 300 between adjacent distillation plates 200 are located on different vertical planes. An upper baffle 310 and a lower baffle 320 are vertically provided on the inner wall of the fluid channel 300 on the side close to the distillation plate 200. The upper baffle 310 extends upward along the inner wall of the fluid channel 300. The upper baffle 310, the upper surface of the distillation plate 200 and the inner wall of the shell 100 form a liquid evaporation chamber 330. The mixed liquid flowing down from the upper end of the shell 100 can fill each liquid evaporation chamber 330 in sequence from top to bottom. In detail, the liquid evaporation chamber 330 at the upper position is filled with the mixed liquid and overflows, and enters the liquid evaporation chamber 330 below through the fluid channel 300.

[0055] The upper baffle 310 and the lower baffle 320 are vertically fixed on the distillation plate 200; the lower baffle 320 extends downward along the inner wall of the fluid channel 300; in the two adjacent distillation plates 200, the height of the lower end of the lower baffle 320 of the upper distillation plate 200 is lower than the height of the upper end of the upper baffle 310 of the lower distillation plate 200, so that the liquid level of the mixed liquid in the lower liquid evaporation chamber 330 is higher than the lowest end of the lower baffle 320 at the upper position, thereby forming a liquid seal between the two adjacent liquid evaporation chambers 330, and the steam can only flow upward through the steam through hole 220 of the exhaust sleeve 210, thereby increasing the contact area between the steam and the mixed liquid, improving the gasification efficiency of the mixed liquid, and thus improving the distillation efficiency.

[0056] The upper baffle 310 is arranged at a position closer to the axis of the shell 100 relative to the lower baffle 320, so that a step surface is formed between the upper baffle 310 and the lower baffle 320 on the same distillation plate 200. The liquid in the liquid evaporation chamber 330 will flow through the step surface when flowing out. The step surface has an obstructive effect on the downward flow of the mixed liquid, so as to reduce the impact of the mixed liquid on the distillation plate 200 below, reduce the uncontrollable deformation and vibration of the distillation plate 200, and realize fine control of different working states of the distillation plate 200.

[0057] In detail, after the mixed liquid in the upper liquid evaporation chamber 330 is filled, it flows downward. During the flow, it will pass through the step surface in the fluid channel 300 before entering the lower liquid evaporation chamber 330; the light component liquid vaporized and evaporated in the lower liquid evaporation chamber 330 will pass through the steam through hole 220 of the upper distillation plate 200 and enter the upper liquid evaporation chamber 330.

[0058] A support frame assembly 230 is installed within the steam vent 220. The support frame assembly 230 is composed of multiple diamond-shaped frames connected end-to-end to form a ring and fixed to the inner wall of the steam vent 220. This supports the inner wall of the steam vent 220. When the distillation plate 200 switches between different operating states, the support frame assembly 230 prevents the steam vent 220 from deforming and closing, which would affect steam flow efficiency. The diamond-shaped frames are made of a flexible material.

[0059] In detail, adjacent diamond frames are connected through the vertices of the frames, and the connected parts are located at the middle height position of the axis of the exhaust sleeve 210. When the distillation plate 200 switches the working state, the deformation of the distillation plate 200 drives the exhaust sleeve 210 to deform, and the deformation rate of the middle height part of the exhaust sleeve 210 is the smallest.

[0060] In one embodiment, the technical solution of the support frame assembly 230 can also be replaced with the following technical solution: a support plate assembly is disposed within the steam through hole 220. The support plate assembly comprises a plurality of diamond-shaped plates connected end to end to form a ring and fixed to the inner wall of the steam through hole 220 to support the inner wall of the steam through hole 220. The diamond-shaped plates are made of a flexible material. The support plate assembly has the advantages of simple structure and low manufacturing cost.

[0061] A protruding block 500 is fixedly connected to the interior of the housing 100 , and the telescopic cylinder 400 is fixedly connected to the protruding block 500 ; the setting position of the protruding block 500 corresponds to the setting position of the telescopic cylinder 400 .

[0062] The upper end of the shell 100 has a cooling function, and a heating source 540 is provided at the lower end of the shell 100. The heating source 540 is used to heat the mixed liquid at the bottom of the shell 100; a condensation groove 510 is provided on the inside of the upper end of the shell 100, and the condensation groove 510 is fixedly connected to the inner wall of the upper end of the shell 100; a liquid outlet inclined plate 520 is provided at the upper end of the interior of the shell 100 below the condensation groove 510, and the liquid outlet inclined plate 520 is fixedly connected to the liquid outlet 130 at an angle. The liquid overflowing from the condensation groove 510 flows onto the liquid outlet inclined plate 520, and the liquid outlet inclined plate 520 can guide the liquid to the liquid outlet 130, and the liquid is discharged from the shell 100 through the liquid outlet 130.

[0063] Specifically, steam contacts the inner wall of the upper end of housing 100, where it cools and liquefies. After liquefaction, it flows into condensate tank 510. The liquid fills condensate tank 510 and overflows. The overflowing liquid flows onto liquid outlet sloping plate 520 and flows through liquid outlet 130, where it exits housing 100. Liquid outlet 130 can also be connected to other production equipment. Heat source 540 is an electric heating rod.

[0064] For ease of understanding, the use process of the embodiment of the present invention is described in detail below.

[0065] The external mixed liquid enters the shell 100 through the mixed liquid inlet 120, and the external steam enters the shell 100 through the steam inlet 110. Initially, the distillation plate 200 is in the first working state. The mixed liquid at the bottom of the shell 100 enters the cooler 530 through the lower end of the shell 100. After entering the cooler 530, the mixed liquid re-enters the shell 100 from the upper end of the shell 100. The mixed liquid flows from top to bottom in the shell 100, so that the liquid evaporation chambers 330 from top to bottom are filled with the mixed liquid in sequence. In the shell 100, the steam is discharged from the bottom to the top of the shell 100. As the steam flows from the bottom to the top of the shell 100, it passes through the steam holes 220, heating the mixed liquid in the liquid evaporation chamber 330, evaporating the light component liquid and liquefying the heavy component liquid in the liquid evaporation chamber 330. When the steam flow rate is too high, the telescopic cylinder 400 extends, switching the distillation plate 200 to the second operating state. When the steam flow rate is too low, the telescopic cylinder 400 contracts, switching the distillation plate 200 to the third operating state. When impurities block the steam holes 220, the telescopic cylinder 400 continues to extend and retract, switching the distillation plate 200 to the fourth operating state. The steam reaches the top of the shell 100, where it is pre-cooled and liquefied. The liquefied liquid flows into the condensate tank 510, from which the liquid flows to the liquid outlet inclined plate 520, and then through the liquid outlet inclined plate 520 to the liquid outlet port 130, where it flows out of the shell 100.

[0066] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0067] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A distillation device for producing methylcyclohexanediamine, characterized in that: It includes a shell, a distillation plate and a telescopic cylinder; The shell is cylindrical and vertically arranged, with a steam inlet and a mixed liquid inlet provided at the lower end of the shell and a liquid outlet provided at the upper end of the shell; The outer edges of the distillation plates are fixed to the inner wall of the shell. The upper surfaces of the distillation plates are capable of accumulating the mixed liquid. Multiple exhaust sleeves are evenly distributed on the distillation plates. The exhaust sleeves are thicker than the distillation plates, and steam holes are provided in the exhaust sleeves along the axial direction. Half-moon-shaped notches are provided in the distillation plates. The inner walls of the notches and the inner wall of the shell form fluid channels through which the mixed liquid and steam can pass. The fluid channels between adjacent distillation plates are located on different vertical planes. An upper baffle and a lower baffle are vertically arranged on the inner wall of the fluid channel close to the distillation plate; The upper baffle extends upward along the inner wall of the fluid channel. The upper baffle, the upper surface of the distillation plate and the inner wall of the shell form a liquid evaporation chamber. The mixed liquid flowing down from the upper end of the shell can fill each liquid evaporation chamber in sequence from top to bottom. The lower baffle extends downward along the inner wall of the fluid channel; in two adjacent distillation plates, the lowermost end of the lower baffle of the upper distillation plate is lower than the uppermost end of the upper baffle of the lower distillation plate, thereby forming a liquid seal between the two adjacent liquid evaporation chambers; The distillation plate and the exhaust sleeve are made of flexible materials; The telescopic cylinder is capable of extension and contraction. The telescopic cylinder is fixed to the inner wall of the shell and is arranged below the distillation plate. The extension and contraction of the telescopic cylinder can cause the distillation plate to convex or concave. The exhaust sleeve is fixed to the distillation plate. The convexity or concaveness of the distillation plate causes the exhaust sleeve to deform. The convexity of the distillation plate increases the upper end diameter of the steam through hole and decreases the lower end diameter. The concaveness of the distillation plate causes the upper end diameter of the steam through hole to decrease and the lower end diameter to increase. The telescopic cylinder can continuously expand and contract to change the size of the steam hole in the exhaust sleeve to prevent impurities from clogging the steam hole; A plurality of distillation plates are provided, and all the distillation plates are fixed horizontally on the inner wall of the shell in sequence from top to bottom; Multiple telescopic cylinders are provided under each distillation plate; The distillation plate has a first working state, a second working state, a third working state, and a fourth working state. Initially, the distillation plate is in the first working state, and the surface of the distillation plate is horizontal. When the steam flow rate is too high, the telescopic cylinder extends to drive the distillation plate convex. When the steam flow rate is too low, the telescopic cylinder shortens to drive the distillation plate concave. The surface of the distillation plate is divided into multiple adjacent sub-areas, and a telescopic cylinder is installed under each sub-area. The telescopic cylinder can make the corresponding sub-area convex or concave, so that the single sub-area can switch to different working states; When the distillation plate is in the fourth working state, the telescopic cylinder enables each sub-region to alternately switch to a different working state, and the telescopic cylinder enables adjacent sub-regions on the distillation plate to be in different working states.

2. The distillation device for producing methylcyclohexanediamine according to claim 1, characterized in that: The sub-area is a rectangular area, and the length direction of the sub-area is arranged along the radial direction of the shell. A connecting block is fixedly connected to the bottom of each sub-area, and a connecting rod is fixedly connected to the bottom of the connecting block. The connecting rod is arranged along the length direction of the sub-area, and the two ends of the connecting rod are respectively connected to a telescopic cylinder; the telescopic cylinder drives the connecting rod to move up and down, and the up and down movement of the connecting rod drives the connecting block to move up and down, and the up and down movement of the connecting block drives the corresponding sub-area to switch to different working states.

3. The distillation device for producing methylcyclohexanediamine according to claim 1, characterized in that: A cooler is provided on the outer wall of the shell, one end of the cooler is connected to the upper end of the shell, and the other end of the cooler is connected to the lower end of the shell; The mixed liquid inside the lower end of the shell enters the cooler through the lower end of the shell. After entering the cooler, the mixed liquid enters the shell from the upper end of the shell, so that the mixed liquid passes through each distillation plate from top to bottom in sequence.

4. The distillation device for producing methylcyclohexanediamine according to claim 1, characterized in that: The upper baffle is arranged at a position closer to the axis of the shell relative to the lower baffle, so that a step surface is formed between the upper baffle and the lower baffle on the same distillation plate. When the liquid in the liquid evaporation chamber flows out, it flows through the step surface. The step surface has an obstructive effect on the flow of the mixed liquid, thereby reducing the impact of the mixed liquid on the distillation plate below.

5. The distillation device for producing methylcyclohexanediamine according to claim 4, characterized in that: A support plate group is provided in the steam through hole. The support plate group is composed of a plurality of diamond-shaped plates. The diamond-shaped plates are connected end to end to form a ring and fixed to the inner wall of the steam through hole to support the inner wall of the steam through hole. The diamond-shaped plate is made of flexible material.

6. The distillation device for producing methylcyclohexanediamine according to claim 4, characterized in that: A support frame group is provided in the steam through hole. The support frame group is composed of a plurality of diamond-shaped frames. The diamond-shaped frames are connected end to end to form a ring and fixed to the inner wall of the steam through hole to support the inner wall of the steam through hole. The diamond-shaped frame is made of flexible material.

7. The distillation device for producing methylcyclohexanediamine according to claim 1, characterized in that: The interior of the shell is fixedly connected to a convex block, and the telescopic cylinder is fixedly connected to the convex block.

8. The distillation device for producing methylcyclohexanediamine according to claim 1, characterized in that: The upper end of the shell has a cooling function, and the lower end of the shell is provided with a heating source for heating the mixed liquid; A condensation groove is provided on the interior of the upper end of the shell, and the condensation groove is fixed to the inner wall of the upper end of the shell; A liquid outlet inclined plate is provided at the upper end of the shell below the condensation tank, and the liquid outlet inclined plate is fixedly connected to the liquid outlet; After the steam contacts the inner wall of the upper end of the shell, it is cooled and liquefied and flows to the condensate tank. The liquid in the condensate tank flows into the liquid outlet through the liquid outlet inclined plate and is discharged from the shell through the liquid outlet.

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