A condensation and distillation tower for methyl ester esterification modification and distillation method thereof

Abstract

The invention discloses a condensation and distillation method for methyl ester esterification transformation, which relates to the technical field of chemical equipment. The method comprises a tower body component, a condensation component, an air guide component, an exhaust component and an air inlet seat, wherein the air guide component and the exhaust component are both arranged at the top of the condensation component, the condensation component is arranged at the top of the tower body component, and the air inlet seat is arranged at the bottom of the tower body component; the tower body component comprises a tower body, a plurality of tower plates are arranged inside the tower body, the condensation component comprises a condensation hood, and flow guide pipes are arranged at both ends of the condensation hood. The method can conveniently collect unsteamed raw materials to facilitate the processing of the unsteamed raw materials, effectively improve the fluidity of the airflow, provide condensation effect and work efficiency, clean impurities on the condensation component to prevent affecting the condensation effect, and promptly remind staff to clean when a large amount of impurities accumulate on internal components.

Description

Technical Field

[0001] The present invention relates to the technical field of chemical equipment, in particular to a condensation and distillation tower for methyl ester esterification transformation and a distillation method thereof. Background Art

[0002] Fatty acid methyl ester is a renewable energy source. Its production generally uses fatty acids and methanol as raw materials. The fatty acid methyl ester product is obtained by esterification reaction under the action of acidic or alkaline catalysts and high temperature conditions. During the esterification process, the liquid in the esterification kettle contains a variety of low-boiling-point substances, causing some chloroacetic acid to be evaporated. Since the distillation tower lacks the ability to handle the high-boiling chloroacetic acid entering the tower, some chloroacetic acid is carried into the crude ester. The subsequent distillation and vacuum equipment are stainless steel or carbon steel equipment, which is easily corroded by chloroacetic acid. Therefore, the crude ester after esterification needs to be neutralized with sodium carbonate and then enters the distillation system for distillation and purification. The current liquid reflux ratio in the distillation tower relies on natural condensation. High-boiling substances will condense in the lower part of the tower body, the vapor-liquid reverse contact path is short, and the tower body temperature is greatly affected by the external temperature. The content of each component in the crude ester varies greatly between summer and winter.

[0003] Publication number CN112973159A discloses an environmentally friendly circulating discharge distillation tower comprising a kettle, a distillation tower body fixed to the top of the kettle, a feed port welded to one side of the distillation tower body, a reboiler fixed to one side of the kettle via a conduit, a steam inlet opening having a diameter of five centimeters for facilitating the introduction of mixed steam into the reboiler, a multi-mode rapid condensation structure fixed to the top of the kettle, and a cooler connected to the lower end of the multi-mode rapid condensation structure via a conduit. However, in practical applications, it is difficult to process unsteamed raw materials.

[0004] Moreover, some existing technologies will cause the fluidity of the airflow to decrease during use, causing the airflow to flow slowly, reducing the condensation effect, and resulting in low work efficiency. After long-term use, the condensation components are easily attached with impurities, which are inconvenient to clean and affect the condensation effect. In addition, more impurities will accumulate on the internal components, affecting the normal use of the components.

[0005] Therefore, it is necessary to invent a condensation and distillation tower for methyl ester esterification transformation and a distillation method thereof to solve the above problems. Summary of the Invention

[0006] The object of the present invention is to provide a condensation and distillation tower for methyl ester esterification modification and a distillation method thereof, so as to solve the problems raised in the above background technology.

[0007] To achieve the above-mentioned object, the present invention provides the following technical solution: a condensation and distillation tower for methyl ester esterification modification, comprising a tower body assembly, a condensation assembly, an air guide assembly, an exhaust assembly, and an air inlet seat, wherein the air guide assembly and the exhaust assembly are both arranged at the top of the condensation assembly, the condensation assembly is arranged at the top of the tower body assembly, and the air inlet seat is arranged at the bottom of the tower body assembly;

[0008] The tower body assembly includes a tower body, and a plurality of tower plates are provided inside the tower body;

[0009] The condensation assembly includes a condensation hood, wherein both ends of the condensation hood are provided with a guide pipe, a plurality of conduits are provided between the two guide pipes, a plurality of extended fins are provided around the outer side of the conduits, a connecting plate with an annular structure is provided inside the extended fins, a plurality of arc-shaped fins are provided around the outer side of the connecting plate, and inclined fins are symmetrically staggered on both sides of the middle of the connecting plate;

[0010] The air guide assembly includes an air guide cover, the inner side wall of the air guide cover is surrounded by a plurality of annular fins, the inner circumferential surface of the annular fins is evenly and movably connected to a plurality of magnetic plates, the top of the air guide cover is provided with an air outlet pipe, the interior of the air outlet pipe is provided with an air inlet pipe, and the outer bottom of the air inlet pipe is evenly sleeved with annular electromagnets corresponding to the magnetic plates, and the angle of the magnetic plates can be adjusted by generating a magnetic attraction between the annular electromagnets and the magnetic plates;

[0011] The exhaust assembly includes an exhaust pipe, and the exhaust pipe is fixedly arranged on the top end of the condensation hood.

[0012] Preferably, the condensation hood is fixedly arranged on the top of the tower body, the guide pipe is arranged as an annular structure, the conduit is arranged as an arc structure, and a plurality of the conduits are distributed in an annular array.

[0013] Preferably, the extended fin is configured as an annular structure, the connecting plate is rotatably sleeved on the outside of the conduit, one end of the arc-shaped fin is fixedly provided on the inner wall of the extended fin, and a plurality of drainage holes are provided around both ends of the outer wall of the extended fin. The setting of the drainage holes facilitates the backflow of the raw material after condensation.

[0014] Preferably, the air guide hood is fixedly arranged inside the condensation hood, the air guide hood is located directly above the tower body, the bottom end of the air guide hood is provided with a conical surface, the top of the exhaust pipe is provided with an electric push rod, the top of the electric push rod is provided with a connecting block, and the end of the connecting block is fixedly connected to the top of the side of the intake pipe.

[0015] Preferably, an air intake fan is provided at the inner top of the air intake pipe, and an air intake cover is provided at the top of the air intake pipe. The position of the air intake cover is higher than the top of the air outlet pipe, and a plurality of air intake holes are provided around the upper surface of the air intake cover. The setting of the air intake holes facilitates the entry of outside air into the air guide cover.

[0016] Preferably, the tower plate is arranged as a semicircular structure, and the tower plates are staggered in the vertical direction. An overflow groove is provided on one side of the tower plate, and a plurality of circular holes are provided through the lower surface of the tower plate. Fixed pipes are provided at the notches of the circular holes. The setting of the overflow groove helps to control the liquid level above the tower plate.

[0017] Preferably, a flow guide cover is provided at the top of the fixed tube, and the flow guide cover is arranged as an umbrella-shaped structure. A plurality of exhaust grooves are opened around the top of the outer wall of the fixed tube. The setting of the umbrella-shaped structure allows the gas to diffuse outward evenly to increase the contact area between the gas and the liquid raw material.

[0018] Preferably, a liquid inlet pipe and a liquid drain pipe are respectively provided on the outside of the two guide pipes, one end of the liquid inlet pipe and the liquid drain pipe both extend to the outside of the condensation hood, and the liquid inlet pipe and the liquid drain pipe are used for injecting and discharging condensed water.

[0019] Preferably, the air inlet seat is configured as a horn structure, and the air inlet seat is fixedly arranged at the bottom end of the tower body, a circular groove is opened through the middle of the exhaust pipe, the air outlet pipe is arranged through the inside of the circular groove, a limit plate is provided on the top side of the air outlet pipe, a side plate is provided on the side of the exhaust pipe, a limit rod passing through the limit plate is provided on the surface of the side plate, a distance sensor is provided on the top of the limit rod, a spring is sleeved on the limit rod, and the setting of the circular groove facilitates the installation of the air outlet pipe, and the air inlet seat can guide the gas to ensure that the vaporized raw materials can enter the interior of the device.

[0020] A distillation method for a condensation distillation tower modified for methyl ester esterification, wherein the distillation method uses a condensation distillation tower modified for methyl ester esterification to achieve methyl ester esterification modification, comprising the following steps:

[0021] Step 1: Equipment installation: assemble the exhaust assembly, condensation assembly, tower assembly and air inlet seat from top to bottom, install the air inlet seat on the top of the esterification kettle for the mixed reaction of chloroacetic acid and methanol, and connect the condensed water pipeline to the condensation assembly;

[0022] Step 2: heating the raw materials, heating the raw materials in the esterification kettle, and causing the multi-element azeotropes such as methyl chloroacetate, methyl dichloroacetate, water and methanol to vaporize in the esterification kettle and move upward, and enter the tower body assembly through the air inlet seat;

[0023] Step 3: Initial cooling, the vaporized raw materials move from bottom to top in the tower assembly, during which the temperature of the gas decreases;

[0024] Step 4, condensation. After the gas moves to the condensation component, the gas is rapidly cooled down under the action of the condensed water in the condensation component, so that the high-boiling substances in the gas condense into liquid and flow back into the esterification kettle, while the crude ester in the gas continues to move upward and is discharged through the exhaust component discharge device, so that the crude ester can be evaporated.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] 1. The present invention provides a tower body assembly with a plurality of trays disposed inside the tower body assembly. The condensed raw material flows through the plurality of trays in sequence during the reflux process. During this process, the raw material liquid can exchange heat with the vaporized raw material to achieve a certain degree of cooling of the raw material gas, thereby improving the condensation and separation effect of the condensation assembly on the gaseous raw material. Moreover, by using the condensed raw material as a cooling medium, the problem of using spray water to affect the raw material concentration can be effectively avoided.

[0027] 2. The present invention makes the air outlet pipe and the air guide hood move back and forth up and down. When the air guide hood moves upward, it can squeeze the gas between the top of the air guide hood and the condensation hood to flow upward quickly, so that the gas is quickly discharged from the exhaust pipe, ensuring smooth gas flow. However, due to the staggered distribution of tower plates, the resistance to pushing the gas downward is significantly increased, resulting in an increase in the air pressure between the bottom of the air guide hood and the tower plate at the top. Therefore, the airflow between the bottom of the air guide hood and the tower plate at the top is forced to flow upward quickly between the air guide hood and the condensation hood.

[0028] 3. The present invention can push the air downward when the air guide cover moves downward, so that the air flow quickly flows upward from between the air guide cover and the condensation cover, and the extended fins and the connecting plate rotate around the duct. At the same time, the rotation of the inclined fins can further promote the upward flow of the air flow, accelerate the flow speed of the air flow, and effectively prevent the vapor from stagnating between the air guide cover and the condensation cover to affect the condensation effect, and effectively improve the smooth upward flow of the vapor, reduce the flow resistance, and improve work efficiency.

[0029] 4. The present invention drives the air intake pipe downward by contracting the electric push rod, so that the bottom end of the air intake pipe contacts the inner bottom of the air guide cover and continues to push the air guide cover downward, the spring is stretched, and then the electric push rod is extended to drive the air intake pipe upward through the connecting block, and the air guide cover is driven to move upward under the action of the spring reset, and the extension of the electric push rod is stopped before the spring is completely reset. In this way, the electric push rod is reciprocated and extended at a high frequency, so as to realize high-frequency up and down vibration of the air guide cover, and during the vibration process, the spring is always in a stretched state, so that the high-frequency vibration of the air guide cover can be used to realize high-frequency fluctuation of the air flow around the air guide cover, and then the high-frequency fluctuating airflow is used to clean impurities attached to the outer wall of the duct, the inner wall of the extended fin, the curved fin and the inclined fin.

[0030] 5. When the amount of impurities inside the air scoop increases, the air scoop drives the air intake pipe to move downward, and at the same time, the limit plate moves downward, and the distance between the limit plate and the top end of the limit rod gradually increases. When the distance sensor at the top end of the limit rod detects that the distance between the limit plate and the top end of the limit rod is greater than the threshold value set by the distance sensor, it is actively determined that there are too many impurities in the air scoop, and the user can be reminded to clean the air scoop through an external controller. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0032] Figure 2 It is a schematic cross-sectional view of the overall structure of the present invention.

[0033] Figure 3 It is a schematic structural diagram of the condensation component of the present invention.

[0034] Figure 4 This is a schematic diagram of the internal structure of the condensing component of the present invention.

[0035] Figure 5 Schematic diagram of the extended fin structure of the present invention.

[0036] Figure 6 Schematic diagram of the inclined fin structure of the present invention.

[0037] Figure 7 It is a schematic diagram of the exhaust assembly structure of the present invention.

[0038] Figure 8 Schematic diagram of the structure of the gas guide component of the present invention.

[0039] Figure 9 It is a schematic cross-sectional view of the air guide component structure of the present invention.

[0040] Figure 10 This is a diagram of the gas flow trajectory inside the gas guide component structure of the present invention.

[0041] Figure 11 It is a schematic cross-sectional view of the tower assembly structure of the present invention.

[0042] Figure 12 It is a schematic diagram of the tower plate structure of the present invention.

[0043] Figure 13 It is a schematic cross-sectional view of the tower plate structure of the present invention.

[0044] Figure 14 For the present invention Figure 13 A magnified schematic diagram of the structure in the middle.

[0045] Figure 15 It is a schematic diagram of the top structure of the tower body of the present invention.

[0046] Figure: 1, tower body assembly; 2, condensation assembly; 3, air guide assembly; 4, exhaust assembly; 5, air inlet seat; 101, tower body; 102, tower plate; 103, overflow trough; 104, circular hole; 105, fixed pipe; 106, guide cover; 107, exhaust trough; 201, condensation cover; 202, guide pipe; 203, guide tube; 204, extended fin; 205, connecting plate; 206, curved fin; 207, inclined fin; 208, drainage Hole; 209, liquid inlet pipe; 210, liquid discharge pipe; 301, air guide cover; 302, conical surface; 303, annular fin; 304, magnetic plate; 305, air outlet pipe; 306, air inlet pipe; 307, connecting block; 308, air intake fan; 309, air intake cover; 310, air intake hole; 311, annular electromagnet; 401, exhaust pipe; 402, circular groove; 403, limit plate; 404, side plate; 405, limit rod; 406, spring. DETAILED DESCRIPTION

[0047] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0048] First embodiment

[0049] like Figure 1-14 As shown, the present invention provides a condensation and distillation tower for methyl ester esterification modification, comprising a tower body component 1, a condensation component 2, an air guide component 3, an exhaust component 4 and an air inlet seat 5. The air guide component 3 and the exhaust component 4 are both arranged at the top of the condensation component 2, and the condensation component 2 is arranged at the top of the tower body component 1. Specifically, the condensation component 2 is used to condense high-boiling substances in the vapor rising to the top of the tower body 101 into liquid.

[0050] The air inlet seat 5 is arranged at the bottom end of the tower body assembly 1. The air inlet seat 5 is arranged as a trumpet structure, and the air inlet seat 5 is fixedly arranged at the bottom end of the tower body 101. Specifically, the air inlet seat 5 can play a role in guiding gas to ensure that the vaporized raw materials can enter the interior of the device.

[0051] The tower body assembly 1 includes a tower body 101, and a plurality of tower plates 102 are provided inside the tower body 101. The tower plates 102 are arranged in a semicircular structure, and the tower plates 102 are staggered in the vertical direction. An overflow groove 103 is provided on one side of the tower plate 102, and a plurality of circular holes 104 are opened through the lower surface of the tower plate 102. A fixed pipe 105 is provided at the notch of the circular hole 104. A guide cover 106 is provided at the top of the fixed pipe 105, and the guide cover 106 is arranged in an umbrella-shaped structure. A plurality of exhaust grooves 107 are opened around the top of the outer wall of the fixed pipe 105. Specifically, the vapor passes through the staggered tower plates 102 in sequence during the rising process. When passing through the tower plate 102, the vapor enters the fixed pipe 105 from the circular holes 104 evenly distributed on the tower plate 102, and is then discharged from the exhaust groove 107, so that the vapor can be evenly distributed and risen.

[0052] The condensation assembly 2 includes a condensation cover 201, and both ends of the interior of the condensation cover 201 are provided with a guide pipe 202. A plurality of conduits 203 are provided between the two guide pipes 202. A plurality of extension fins 204 are provided around the outside of the conduit 203. A connecting plate 205 of an annular structure is provided inside the extension fin 204. A plurality of arc-shaped fins 206 are provided around the outside of the connecting plate 205. The condensation cover 201 is fixedly provided at the top of the tower body 101. The guide pipe 202 is provided in an annular structure, the conduit 203 is provided in an arc-shaped structure, and the plurality of conduits 203 are distributed in an annular array. The extension fin 204 is provided in an annular structure, and one end of the arc-shaped fin 206 is fixedly provided. A plurality of drainage holes 208 are provided around the inner wall of the extended fin 204 and both ends of the outer wall of the extended fin 204. A liquid inlet pipe 209 and a liquid drain pipe 210 are respectively provided on the outer sides of the two guide pipes 202. One end of the liquid inlet pipe 209 and the liquid drain pipe 210 extend to the outside of the condensation cover 201. Specifically, the vapor passes through the plurality of extended fins 204 in sequence and contacts the inclined fins 207 inside the extended fins 204. At this time, the condensed water is transported to the guide pipe 202 and the conduit 203 through the liquid inlet pipe 209. At this time, the condensed water exchanges heat with the gas raw material through the inclined fins 207 and the extended fins 204, so that the high-boiling substances in the gas raw material are condensed.

[0053] The air guide assembly 3 includes an air guide cover 301, the inner side wall of the air guide cover 301 is surrounded by a plurality of annular fins 303, the top of the air guide cover 301 is provided with an air outlet pipe 305, the inside of the air outlet pipe 305 is provided with an air inlet pipe 306, the air guide cover 301 is fixedly arranged inside the condensation cover 201, the air guide cover 301 is located just above the tower body 101, the bottom end of the air guide cover 301 is provided with a conical surface 302, the top of the exhaust pipe 401 is provided with an electric push rod, the top of the electric push rod is provided with a connecting block 307, the end of the connecting block 307 is fixedly connected to the side top of the air inlet pipe 306, the inner top of the air inlet pipe 306 is provided with an air intake fan 308, the top of the air inlet pipe 306 is provided with an air intake cover 309, the position of the air inlet cover 309 The air inlet hood 309 is located above the top of the air outlet pipe 305, and a plurality of air inlet holes 310 are provided around the upper surface of the air inlet hood 309. Specifically, when the vapor comes into contact with the air guide hood 301, the temperature of the air guide hood 301 rises. At this time, the air inlet fan 308 is started, and the outside air is drawn into the air inlet pipe 306 by the air inlet fan 308 through the air inlet hood 309 and the air inlet holes 310, and then transported to the air guide hood 301. The air in the air guide hood 301 can be discharged to the top of the device through the air outlet pipe 305. In this process, the air exchanges heat with the air guide hood 301 through the annular fins 303 to achieve cooling of the air guide hood 301. At the same time, the heated air is discharged to the top of the device to reduce the impact of the ambient temperature on the device.

[0054] More specifically, the air intake pipe 306 can be moved up and down by utilizing the extension and retraction of the electric push rod through the connecting block 307 , so that the height of the air intake pipe 306 can be adjusted, and then the distance between the bottom end of the air intake pipe 306 and the air guide cover 301 can be adjusted.

[0055] The exhaust assembly 4 includes an exhaust pipe 401, which is fixedly arranged at the top of the condensation hood 201. A circular groove 402 is opened through the middle of the exhaust pipe 401, and the exhaust pipe 305 is arranged inside the circular groove 402. Specifically, the crude ester in the gas raw material continues to move upward because it has not reached the condensation temperature, and is discharged through the exhaust pipe 401.

[0056] The present invention also provides a distillation method for a condensation distillation tower modified for methyl ester esterification, comprising the following steps:

[0057] Step 1: Equipment installation: Assemble the exhaust assembly 4, condensation assembly 2, tower assembly 1 and air inlet seat 5 from top to bottom, install the air inlet seat 5 on the top of the esterification kettle for the mixed reaction of chloroacetic acid and methanol, and connect the condensed water pipeline to the condensation assembly 2;

[0058] Step 2: Heating the raw materials: heating the raw materials in the esterification kettle, and the multi-element azeotropes such as methyl chloroacetate, methyl dichloroacetate, water and methanol are vaporized in the esterification kettle and move upward, and enter the tower body assembly 1 through the air inlet seat 5;

[0059] Step 3: Initial cooling: the vaporized raw materials move from bottom to top in the tower assembly 1, and the temperature of the gas decreases during this process;

[0060] The raw gas moves upward under the action of the hot air, enters the guide cover 106 through the circular hole 104 and the fixed tube 105, and extends along the inner wall of the guide cover 106 to move. The raw gas passes through the exhaust groove 107 and reaches the top of the tower plate 102. During this process, the condensed raw liquid in the condensation component 2 flows downward to the top of the tower plate 102 and accumulates a small amount above the tower plate 102. At this time, the raw gas and the raw liquid exchange heat, which reduces the temperature of the raw gas to a certain extent, so that the condensation component 2 can condense the raw gas. At the same time, the temperature of the raw liquid is increased, so that the raw liquid in the ester is heated.

[0061] Step 4, condensation. After the gas moves to the condensation component 2, the gas is rapidly cooled down under the action of the condensed water in the condensation component 2, so that the high-boiling substances in the gas condense into liquid and flow back into the esterification kettle, while the crude ester in the gas continues to move upward and is discharged through the exhaust component 4. At this point, the crude ester can be evaporated.

[0062] When the device of this embodiment is in use, the raw gas moves upward through the tower plate 102 and contacts the conical surface 302, and moves outward along the conical surface 302. Under the guidance of the conical surface 302, the raw gas moves to between the gas guide hood 301 and the condensation hood 201 and moves upward.

[0063] During this process, the raw gas passes through multiple extended fins 204 in sequence and contacts the inclined fins 207 inside the extended fins 204. At this time, the condensed water is transported to the guide pipe 202 and the conduit 203 through the liquid inlet pipe 209. At this time, the condensed water exchanges heat with the gas raw material through the inclined fins 207 and the extended fins 204, so that the high-boiling substances in the gas raw material are condensed, while the crude ester in the gas raw material continues to move upward because it has not reached the condensation temperature, and is discharged through the exhaust pipe 401.

[0064] When the gas raw material comes into contact with the air guide hood 301, heat exchange occurs between the gas raw material and the air guide hood 301, causing the temperature of the air guide hood 301 to rise. At this time, the outside air is drawn into the air intake pipe 306 by the air intake fan 308 through the air intake hood 309 and the air intake hole 310, and then transported to the air guide hood 301. The air in the air guide hood 301 can be discharged to the top of the device through the air outlet pipe 305. In this process, the air exchanges heat with the air guide hood 301 through the annular fin 303 to achieve cooling of the air guide hood 301. At the same time, the heated air is discharged to the top of the device to reduce the impact of the ambient temperature on the device.

[0065] Second embodiment

[0066] like Figure 1-15 As shown, based on a methyl ester esterification modified condensing and distilling tower provided in the first embodiment, in actual use, due to the setting of the condensing component 2, the vapor will encounter greater resistance after passing through the condensing component 2, resulting in stagnation of the vapor, affecting the condensation effect, slowing down the flow rate of the vapor, resulting in low working efficiency, and after working for a long time, more impurities will adhere to the condensing component 2, thereby affecting the condensation effect. In addition, impurities in the external air will gradually accumulate at the inner bottom of the air guide cover 301, and the impurities will adhere to the annular fin 303, affecting the cooling effect of the air guide cover 301 and the annular fin 303. In order to solve the above problems:

[0067] A limiting plate 403 is provided on the top side of the exhaust pipe 305, and a side plate 404 is provided on the side of the exhaust pipe 401. A limiting rod 405 is provided on the surface of the side plate 404 and passes through the limiting plate 403. A distance sensor is provided on the top of the limiting rod 405, and a spring 406 is sleeved on the limiting rod 405. Specifically, the exhaust pipe 305 can move up and down along the limiting rod 405, and under the action of the spring 406, conditions are provided for the outlet pipe 305 to be reset.

[0068] The connecting plate 205 is rotatably sleeved on the outside of the conduit 203, and inclined fins 207 are symmetrically staggered on both sides of the middle of the connecting plate 205. Specifically, the inclined fins 207 are fan blade structures, which can realize the rotation of the extended fins 204 when air flows through.

[0069] The inner circumferential surface of the annular fin 303 is evenly and movably connected with multiple magnetic plates 304, and the outer bottom of the air intake pipe 306 is evenly sleeved with an annular electromagnet 311 corresponding to the magnetic plate 304. Specifically, by generating a magnetic attraction force between the annular electromagnet 311 and the magnetic plate 304, the angle of the magnetic plate 304 can be adjusted.

[0070] When the present embodiment is in use, after the air intake fan 308 introduces external air into the air intake pipe 306, the air flow is dispersed to the surroundings under the action of the conical surface 302 at the bottom of the air guide cover 301, and the air flow is discharged upward through the gap between the air intake pipe 306 and the air outlet pipe 305. At this time, by starting each annular electromagnet 311, a magnetic attraction force is generated between the annular electromagnet 311 and the magnetic plate 304, and the magnetic attraction force can be used to pull the magnetic plate 304. At the same time, the electric push rod is contracted to drive the air intake pipe 306 to move downward through the connecting block 307, thereby driving the annular electromagnet 311 to move downward. At the same time, the magnetic attraction force of the annular electromagnet 311 on the magnetic plate 304 can be used to pull the magnetic plate 304. The magnetic plate 304 is tilted downward at this time, and the resistance of the airflow to the upward movement can be increased when the airflow passes through the conical surface 302 and moves upward. The airflow can be used to push the air guide cover 301 to drive the air outlet pipe 305 to move upward, and the spring 406 is stretched. Secondly, the electric push rod is extended to drive the air inlet pipe 306 to move upward through the connecting block 307, thereby realizing the upward movement of the annular electromagnet 311, which can make the magnetic plate 304 tilt upward. At this time, the magnetic plate 304 has less resistance to the upward flow of the airflow, and the stretched spring 406 is reset, and the air outlet pipe 305 and the air guide cover 301 move downward, thereby performing a cycle, thereby realizing the up and down reciprocating movement of the air outlet pipe 305 and the air guide cover 301. In the process of the up and down reciprocating movement of the air guide hood 301, the air guide hood 301 can be regarded as a piston moving up and down in the condensation hood 201. Therefore, when the air guide hood 301 moves upward, an exhaust effect can be achieved, and the vapor can be sucked upward to accelerate the upward flow speed of the vapor. When the air guide hood 301 moves upward, the gas between the top of the air guide hood 301 and the condensation hood 201 can be squeezed to flow upward quickly, so that the gas can be quickly discharged from the exhaust pipe 401, ensuring the smooth flow of gas. When the air guide hood 301 moves downward, the effect of pushing the gas downward can be achieved. However, due to the staggered distribution of the tower plates 102, the resistance to pushing the gas downward is significantly increased, resulting in a gap between the bottom of the air guide hood 301 and the tower plate 1 at the top. 02 increases, so the air flow between the bottom of the air guide hood 301 and the tower plate 102 at the top is forced to flow upward rapidly between the air guide hood 301 and the condensation hood 201. When the air flow flows upward rapidly between the air guide hood 301 and the condensation hood 201, the extended fins 204 and the connecting plates 205 can be rotated around the conduit 203 under the action of the inclined fins 207. At the same time, the rotation of the inclined fins 207 can further promote the upward flow of the air flow, accelerate the flow speed of the air flow, and effectively prevent the vapor from stagnating between the air guide hood 301 and the condensation hood 201 to affect the condensation effect, and effectively improve the smooth upward flow of the vapor, reduce the flow resistance, and improve work efficiency.

[0071] In addition, after long-term use, more impurities will be attached to the outer wall of the duct 203, the inner wall of the extended fin 204, the curved fin 206 and the inclined fin 207, which will affect the heat exchange and reduce the condensation effect. Therefore, it is necessary to clean the condensation component 2 regularly. When the cleaning time of the condensation component 2 is reached, the electric push rod is started to shrink and drive the air intake pipe 306 to move downward, so that the bottom end of the air intake pipe 306 contacts the inner bottom of the air guide cover 301 and continues to push the air guide cover 301 to move downward, the spring 406 is stretched, and then the electric push rod is extended to drive the air intake pipe 306 to move upward through the connecting block 307. The air guide hood 301 moves upward, and the air guide hood 301 is driven to move upward under the action of the spring 406 returning to its original position, and the extension of the electric push rod is stopped before the spring 406 is completely reset, and this cycle is carried out to make the electric push rod reciprocate and extend at a high frequency, so as to realize the high-frequency up and down vibration of the air guide hood 301, and during the vibration process, the spring 406 is always in a stretched state, so that the high-frequency vibration of the air guide hood 301 can be used to realize the high-frequency fluctuation of the air flow around the air guide hood 301, and then the high-frequency fluctuating airflow is used to clean the impurities attached to the outer wall of the duct 203, the inner wall of the extended fin 204, the curved fin 206 and the inclined fin 207.

[0072] In addition, after long-term use, impurities in the external air will gradually gather at the inner bottom of the air guide cover 301, and the impurities will adhere to the annular fins 303, affecting the cooling effect of the air guide cover 301. At the same time, the weight of the air guide cover 301 increases, and as the impurities inside the air guide cover 301 increase, the air guide cover 301 drives the air intake pipe 306 to move downward, and at the same time the limit plate 403 moves downward, and the distance between the limit plate 403 and the top of the limit rod 405 gradually increases. When the distance sensor at the top of the limit rod 405 detects that the distance between the limit plate 403 and the top of the limit rod 405 is greater than the threshold set by the distance sensor, it actively determines that there are too many impurities in the air guide cover 301, and therefore the user can be reminded to clean the inside of the air guide cover 301 through an external controller.

[0073] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A condensation and distillation tower for methyl ester esterification modification, characterized in that: It includes a tower body component, a condensing component, an air guide component, an exhaust component and an air inlet seat, wherein the air guide component and the exhaust component are both arranged at the top of the condensing component, the condensing component is arranged at the top of the tower body component, and the air inlet seat is arranged at the bottom of the tower body component; The tower body assembly includes a tower body, and a plurality of tower plates are provided inside the tower body; The condensation assembly includes a condensation hood, wherein both ends of the condensation hood are provided with a guide pipe, a plurality of conduits are provided between the two guide pipes, a plurality of extended fins are provided around the outer side of the conduits, a connecting plate with an annular structure is provided inside the extended fins, a plurality of arc-shaped fins are provided around the outer side of the connecting plate, and inclined fins are symmetrically staggered on both sides of the middle of the connecting plate; The air guide assembly includes an air guide cover, the inner side wall of the air guide cover is surrounded by a plurality of annular fins, the inner circumferential surface of the annular fins is evenly and movably connected to a plurality of magnetic plates, the top of the air guide cover is provided with an air outlet pipe, the interior of the air outlet pipe is provided with an air inlet pipe, and the outer bottom of the air inlet pipe is evenly sleeved with an annular electromagnet corresponding to the magnetic plate, and the magnetic plate is adjusted by generating a magnetic attraction between the annular electromagnet and the magnetic plate; The exhaust assembly includes an exhaust pipe, and the exhaust pipe is fixedly arranged on the top of the condensation hood; The air guide cover is fixedly arranged inside the condensation cover, and the air guide cover is located directly above the tower body. The bottom end of the air guide cover is provided with a conical surface. The top of the exhaust pipe is provided with an electric push rod, and the top of the electric push rod is provided with a connecting block. The end of the connecting block is fixedly connected to the top of the side of the intake pipe; A circular groove is formed through the middle of the exhaust pipe, the exhaust pipe is arranged inside the circular groove, a limit plate is provided on the top side of the exhaust pipe, a side plate is provided on the side of the exhaust pipe, a limit rod is provided on the surface of the side plate and passes through the limit plate, a distance sensor is provided on the top of the limit rod, and a spring is sleeved on the limit rod; The outside air is drawn into the air intake pipe through the air intake cover, and then transported to the air guide cover. The air in the air guide cover is discharged to the top through the air outlet pipe; The electric push rod contracts and drives the intake pipe downward, so that the bottom end of the intake pipe contacts the bottom inside the air guide cover and continues to push the air guide cover downward. The spring is stretched, and then the electric push rod extends and drives the intake pipe upward through the connecting block. Under the action of the spring reset, the air guide cover is driven upward.

2. The condensation and distillation tower for methyl ester esterification transformation according to claim 1, characterized in that: The condensation hood is fixedly arranged on the top of the tower body, the guide pipe is arranged as an annular structure, the conduit is arranged as an arc structure, and multiple conduits are distributed in an annular array, the air inlet seat is arranged as a trumpet structure, and the air inlet seat is fixedly arranged at the bottom of the tower body.

3. The condensation and distillation tower for methyl ester esterification transformation according to claim 1, characterized in that: The extended fin is configured as an annular structure, the connecting plate is rotatably sleeved on the outside of the conduit, one end of the arc-shaped fin is fixedly disposed on the inner wall of the extended fin, and a plurality of drainage holes are provided around both ends of the outer wall of the extended fin.

4. The condensation and distillation tower for methyl ester esterification modification according to claim 1, characterized in that: An air intake fan is provided at the inner top of the air intake pipe, an air intake cover is provided at the top of the air intake pipe, the position of the air intake cover is higher than the top of the air outlet pipe, and a plurality of air intake holes are opened around the upper surface of the air intake cover.

5. The condensation and distillation tower for methyl ester esterification modification according to claim 1, characterized in that: The tower plate is arranged in a semicircular structure and is staggered in the vertical direction. An overflow groove is provided on one side of the tower plate. A plurality of circular holes are provided through the lower surface of the tower plate, and a fixing pipe is provided at the notch of the circular hole.

6. The condensation and distillation tower for methyl ester esterification modification according to claim 5, characterized in that: A flow guide cover is provided at the top end of the fixed tube, and the flow guide cover is arranged in an umbrella-shaped structure. A plurality of exhaust slots are provided around the top end of the outer wall of the fixed tube.

7. The condensation and distillation tower for methyl ester esterification modification according to claim 1, characterized in that: A liquid inlet pipe and a liquid drain pipe are respectively provided on the outsides of the two guide pipes, and one end of the liquid inlet pipe and the liquid drain pipe both extend to the outside of the condensation hood.

8. A distillation method for a condensation and distillation tower modified for methyl esterification, wherein the distillation method uses the condensation and distillation tower modified for methyl esterification as claimed in claim 1 to achieve the methyl esterification modification, characterized in that: The following steps are involved: Step 1: Equipment installation: assemble the exhaust assembly, condensation assembly, tower assembly and air inlet seat from top to bottom, install the air inlet seat on the top of the esterification kettle for the mixed reaction of chloroacetic acid and methanol, and connect the condensed water pipeline to the condensation assembly; Step 2: heating the raw materials, heating the raw materials in the esterification kettle, and causing the multi-element azeotrope of methyl chloroacetate, methyl dichloroacetate, water and methanol to vaporize in the esterification kettle and move upward, and enter the tower body assembly through the air inlet seat; Step 3: Initial cooling, the vaporized raw materials move from bottom to top in the tower assembly, during which the temperature of the gas decreases; Step 4, condensation. After the gas moves to the condensation component, the gas is rapidly cooled down under the action of the condensed water in the condensation component, so that the high-boiling substances in the gas condense into liquid and flow back into the esterification kettle, while the crude ester in the gas continues to move upward and is discharged through the exhaust component discharge device, thereby realizing the distillation of the crude ester.

Images