Device for MTBE production and liquefied gas fractionation

Abstract

The invention relates to the technical field of fractionating towers, in particular to a device for MTBE production and liquefied gas fractionation. Comprising a tower body, the tower body is communicated with a feeding pipe, an exhaust pipe and a liquid discharging pipe, the tower body is fixedly connected with first tower trays which are distributed at intervals, each first tower tray is provided with a liquid flowing opening, each first tower tray is fixedly connected with a partition plate, each first tower tray is provided with a plurality of first through holes, a gas distribution shell is arranged in each first through hole of each first tower tray, and each gas distribution shell is provided with a gas outlet. The tower body is internally provided with electric push rods of which the number is consistent with that of the first tower trays, the partition plates are provided with first liquid passing holes, the telescopic ends of the electric push rods are hinged to plugging plates, and the plugging plates are rotationally connected with the adjacent partition plates. By intermittently opening the electric push rod, the blocking plate periodically blocks the first liquid passing hole in the partition plate, so that the flowing time of liquid in the tower body is shortened, the contact time of gas and the liquid is prolonged, and full fractionation is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of fractionation towers, and in particular to a device for MTBE production and liquefied gas fractionation. Background Art

[0002] Methyl tert-butyl ether (MTBE) is an organic compound widely used in the chemical industry. It is often used as an additive to increase the octane number of gasoline in the oil refining industry. It is mainly produced by the reaction of isobutylene and methanol under the action of an acidic catalyst. The process of producing MTBE covers the steps of reaction, separation and purification. A distillation tower is used to separate the MTBE mixture (separating C4 hydrocarbons from MTBE and methanol). At this time, the bottom product is a mixture of MTBE and unreacted methanol, and the top product is unreacted C4 hydrocarbons.

[0003] Fractionation towers are used in MTBE production, and they are also used in the liquefied gas fractionation process, and there is a close connection between the two. Liquefied gas is a mixture of various hydrocarbons, and different fractions can be obtained through fractionation. The bottom product of liquefied gas fractionation is C4 hydrocarbons, which contain isobutylene. In this way, liquefied gas fractionation can provide raw materials for MTBE production.

[0004] Whether it is the mixture fractionation of MTBE or the liquefied gas fractionation, the basic principle of the gas-liquid separation process in the distillation tower is the same. After the raw materials (gas-liquid mixture) are added to the tower, the raw materials will form gas phase and liquid phase in the tower, the gas phase part moves upward, and the liquid phase part moves downward, and is separated through each layer of the tower plate. In this process, the liquid phase moving downward is always in a flowing state, resulting in too short gas-liquid contact time, and the heat between the gas and liquid phases cannot be fully exchanged in time, thereby reducing the separation efficiency, and the product cannot meet the expected purity requirements, which in turn causes the loss of raw materials. Summary of the invention

[0005] In order to overcome the shortcomings mentioned in the above background technology, the present invention provides a device for MTBE production and liquefied gas fractionation.

[0006] Technical solution: A device for MTBE production and liquefied gas fractionation, comprising a tower body, wherein the upper side of the tower body is connected to a feed pipe and an exhaust pipe, the lower side of the tower body is connected to a drain pipe, the interior of the tower body is fixedly connected with first tower plates distributed at intervals, one side of the first tower plate is provided with a liquid flow port, a side of the first tower plate close to the liquid flow port is fixedly connected with a partition plate, the first tower plate is provided with a plurality of first through holes, a gas distribution shell is provided in the first through hole of the first tower plate, electric push rods with the same number as the first tower plates are installed in the tower body, the electric push rods are located on the side of the adjacent first tower plate close to the liquid flow port, the partition plate is provided with a first liquid through hole, the telescopic end of the electric push rod is hinged with a sealing plate, the sealing plate is rotatably connected to the adjacent partition plate, and the sealing plate is used to seal the first liquid through hole of the adjacent partition plate.

[0007] More preferably, it also includes: The number of the liquid guiding tubes is consistent with the number of the first tower plates, and they are all fixedly connected and connected to the tower body. The liquid guiding tube located at the uppermost side is connected to the feed pipe, and the other liquid guiding tubes are respectively connected to the adjacent liquid flow ports.

[0008] More preferably, it also includes: The regulating mechanism, the number of which is the same as the number of the first tower plates, is disposed in the tower body and is used to change the exhaust volume of the air distribution shell. The regulating mechanism includes: The number of regulating shells is the same as the number of the air distribution shells on the same first tower plate, and they are rotatably connected to the adjacent air distribution shells to seal the air distribution shells. The air distribution shells are slidably connected to the first tower plate; The connecting rods are distributed at intervals and are all slidably connected to the tower body; A second tower plate, fixedly connected between all the connecting rods, the second tower plate being provided with a plurality of second through holes, the first through holes of the first tower plate corresponding to the second through holes of the second tower plate one by one; The driving components, the number of which is consistent with the number of the adjusting shells, are respectively arranged on the adjusting shells and are used to drive the adjusting shells to rotate.

[0009] More preferably, the driving assembly comprises: A driving rod, spline-connected to the adjusting housing; A support ring is fixedly connected to the first tower plate, and the drive rod is slidably connected to the support ring, and the support ring is slidably connected to the second tower plate. The second tower plate is provided with a first groove and a second groove, the first groove is communicated with the second groove, and the first groove and the second groove are both used to guide the drive rod, and the first groove is an inclined groove.

[0010] More preferably, the connecting rod is fixedly connected with a float.

[0011] More preferably, the second tower plate is provided with a plurality of third grooves, and the number of the third grooves is consistent with the number of the second grooves, the third grooves are connected with the second grooves and are used to guide the driving rod, the third grooves are inclined grooves, and the second grooves are located between the first grooves and the third grooves.

[0012] More preferably, a plurality of guide plates are fixedly connected to the first tower plate, and a second liquid passage hole is arranged on the lower side of the guide plate.

[0013] More preferably, the guide plate is wavy in shape, and the distance between two adjacent wave crests on the guide plate decreases from bottom to top.

[0014] More preferably, a plurality of intercepting bars are provided on the guide plate.

[0015] More preferably, all the intercepting bars on the same guide plate are staggered in the vertical direction and spaced apart in the horizontal direction.

[0016] Compared with the prior art, the present invention has the following advantages: the present invention intermittently opens the electric push rod to make the sealing plate periodically seal the first liquid hole on the partition plate, thereby reducing the time that the liquid flows in the tower body, prolonging the contact time between the gas and the liquid, and ensuring that the distillation is fully carried out.

[0017] The liquid is evenly dispersed on the first tower plate by guiding the liquid through the liquid guiding pipe, thereby improving the degree of even contact between the liquid and the gas.

[0018] The height of the liquid on the first tray is monitored by the float, and the rotation angle of the regulating shell is controlled, so as to adjust the connection area between the regulating shell and the gas distribution shell, so that the gas discharge volume corresponds to the height of the liquid, avoiding liquid flooding and ensuring the distillation efficiency.

[0019] The gas is guided by the guide plate, which prolongs the path of gas movement and increases the contact time between gas and liquid, ensuring that the gas and liquid are fully separated, thereby improving the distillation effect.

[0020] The intercepting strips are used to disturb the gas flow, so that the gas is evenly dispersed in the liquid, ensuring that the gas and liquid are fully separated, thereby improving the fractionation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention; Figure 2 It is a schematic diagram of the three-dimensional structure of the parts in the tower body of the present invention; Figure 3It is a schematic diagram of the three-dimensional structure of the liquid guide tube and the first tower plate of the present invention; Figure 4 It is a schematic diagram of the three-dimensional structure of the air distribution housing and the electric push rod of the present invention; Figure 5 It is a schematic diagram of the three-dimensional structure of the first tray and the liquid flow port of the present invention; Figure 6 It is a three-dimensional structural exploded view of the components on the first tray of the present invention; Figure 7 It is a schematic diagram of the three-dimensional structure of the air distribution shell of the present invention in a special state; Figure 8 It is a schematic diagram of the three-dimensional structure of the driving rod and the supporting ring of the present invention; Fig. 9 It is a schematic diagram of the three-dimensional structure of the regulating shell of the present invention; Fig.10 It is a schematic diagram of the three-dimensional structure of the second groove and the third groove of the present invention; Fig.11 It is a schematic diagram of the three-dimensional structure of the guide plate and the intercepting strip of the present invention.

[0022] In the figure: 1. tower body, 101. feed pipe, 102. exhaust pipe, 103. drain pipe, 2. liquid guide pipe, 3. first tower plate, 301. liquid flow port, 5. partition plate, 6. gas distribution shell, 7. electric push rod, 8. sealing plate, 21. adjusting shell, 22. connecting rod, 23. second tower plate, 2301. first groove, 2302. second groove, 2303. third groove, 31. driving rod, 32. support ring, 41. float, 51. guide plate, 52. intercepting bar. DETAILED DESCRIPTION

[0023] Although the present invention may be described with respect to a particular application or industry, those skilled in the art will recognize the broader applicability of the present invention.Any numerical designations such as: first or second are merely exemplary and are not intended to limit the scope of the present invention in any way.

[0024] A device for MTBE production and liquefied gas fractionation, combined with Figure 1-Figure 6As shown, it includes a tower body 1, the upper side of the tower body 1 is connected with a feed pipe 101 and an exhaust pipe 102, the lower side of the tower body 1 is connected with a discharge pipe 103, the interior of the tower body 1 is fixedly connected with first tower plates 3 distributed at intervals, one side of the first tower plate 3 is provided with a liquid flow port 301, the side of the first tower plate 3 close to the liquid flow port 301 is fixedly connected with a partition plate 5, the first tower plate 3 is provided with a plurality of first through holes, the first through holes of the first tower plate 3 are provided with an air distribution shell 6, the tower body 1 is installed with electric push rods 7 of the same number as the first tower plates 3, the electric push rods 7 are located on the side of the adjacent first tower plate 3 close to the liquid flow port 301, the partition plate 5 is provided with a first liquid through hole, the telescopic end of the electric push rod 7 is hinged with a sealing plate 8, the sealing plate 8 is rotatably connected to the adjacent partition plate 5, and the sealing plate 8 is used to block the first liquid through hole of the adjacent partition plate 5.

[0025] The above scheme aims to solve the problem that the liquid in the existing distillation tower is always in a flowing state, resulting in insufficient separation of the gas phase and the liquid phase; the number of the first tower plates 3 in this embodiment is four, and they are evenly spaced; two adjacent liquid flow ports 301 are staggered to extend the time the material stays on the first tower plate 3; a liquid level sensor is installed on the upper side of the partition plate 5 to facilitate the identification of the height of the liquid retained on the first tower plate 3; the electric push rod 7 is an existing device, and the outer side of the electric push rod 7 is sprayed with an anti-corrosion coating to reduce the degree of damage to the electric push rod 7 by the material in the tower body 1 and extend its service life; the first The liquid passage hole is located on the lower side of the partition plate 5, and the lower side of the first liquid passage hole on the partition plate 5 is flush with the upper side of the adjacent first tower plate 3; a sealing gasket is arranged on the peripheral side of the sealing plate 8 to ensure the sealing effect of the sealing plate 8 on the first liquid passage hole of the adjacent partition plate 5; the feed pipe 101, the exhaust pipe 102 and the discharge pipe 103 are all equipped with electric control valves, and the feed pipe 101 is connected to the external raw material mixture storage box (the raw material mixture refers to the MTBE mixture or liquefied gas); initially, the lowermost sealing plate 8 blocks the first liquid passage hole of the adjacent partition plate 5; in this embodiment, the gas distribution shell 6 can be regarded as a floating valve.

[0026] Working process: When using the device to fractionate the MTBE mixture (or liquefied gas), open the electric control valves in the feed pipe 101 and the exhaust pipe 102, and add the raw material mixture (i.e., the MTBE mixture or liquefied gas) into the tower body 1. The raw material mixture will be separated into gas and liquid, and the liquid will fall onto the first first tower plate 3 (from top to bottom). At this time, the liquid will fall onto the second first tower plate 3 through the first liquid hole and the first liquid flow port 301 of the first partition plate 5, and this will be repeated until the liquid flows to the fourth first tower plate 3. Since the first liquid hole of the fourth partition plate 5 is blocked, state, so the liquid on the fourth first tower plate 3 cannot flow downward, and its liquid level gradually rises. During this process, the liquid level sensor of the fourth partition plate 5 monitors the liquid height on the first tower plate 3. After the liquid level reaches the specified height, the third electric push rod 7 opens and pushes the sealing plate 8 to rotate, so that the sealing plate 8 blocks the first liquid hole of the third partition plate 5. At this time, the liquid height on the third first tower plate 3 gradually increases, and this is repeated until the liquid level on the first first tower plate 3 reaches the specified height, then stop adding the raw material mixture into the tower body 1, and at this time, the first liquid holes of all partition plates 5 are in a blocked state.

[0027] In the above process of adding the raw material mixture into the tower body 1, the gas separated from the raw material mixture will move upward. When the gas pressure on the lower side of the fourth first tower plate 3 is greater than the resistance of the gas distribution shell 6 to the movement, the gas pushes the upper gas distribution shell 6 on the fourth first tower plate 3 to move, so that the gas moves to the upper side of the fourth first tower plate 3 through the gas distribution shell 6. The gas contacts the liquid on the upper side of the fourth first tower plate 3 and exchanges heat. In this process, the gas continues to move upward and pass through the liquid. This process is repeated. The gas passes through the four first tower plates 3 and contacts the liquid on the four first tower plates 3. After the gas moves into the exhaust pipe 102, it is discharged from the exhaust pipe 102. In the process of the gas passing through the liquid, the height of the liquid gradually increases. After the liquid level reaches the specified height, the addition of the raw material mixture is stopped.

[0028] In the process of the gas passing through the four first tower plates 3, the liquid on all the first tower plates 3 changes from flowing downward to no longer flowing downward, and the passing gas is fully in contact with the liquid, so that the gas and liquid can fully exchange heat, improve the separation efficiency, and ensure that the distillation is fully carried out. With the full separation of the gas and the liquid, the liquid component can be further purified, reducing the residual excess substances in the liquid.

[0029] After the first liquid holes of all partition plates 5 are blocked for a period of time, the electric control valve in the drain pipe 103 is opened, and the raw material mixture is continuously added into the tower body 1. At the same time, all the electric push rods 7 are controlled so that the telescopic ends of the electric push rods 7 drive the adjacent blocking plates 8 to move and release the blockage of the first liquid holes on the adjacent partition plates 5. At this time, the liquid on the first first tower plate 3 flows downward along the first liquid hole and the adjacent liquid flow port 301 on the first partition plate 5 to the second first tower plate 3. This is repeated, and the liquid on the fourth first tower plate 3 flows downward along the first liquid hole and the adjacent liquid flow port 301 on the adjacent partition plate 5 into the drain pipe 103, and the distilled liquid is discharged. The liquid on all the first tower plates 3 is in a flowing state, and the liquid on the first tower plate 3 is replaced. In this process, the gas in the tower body 1 is always discharged outward through the exhaust pipe 102, that is, distillation is always carried out, and heat exchange is continuously carried out to ensure the efficiency of the distillation.

[0030] After the liquid on the first tower plate 3 flows for a period of time, all the electric push rods 7 are controlled so that the telescopic ends of the electric push rods 7 drive the adjacent sealing plates 8 to move, and the sealing plates 8 again seal the first liquid holes on the adjacent partition plates 5. At the same time, the addition of the raw material mixture into the tower body 1 is stopped, and all the liquid on the first tower plate 3 is converted from flowing downward to no longer flowing downward, so that the gas is in full contact with the static liquid, thereby ensuring sufficient heat exchange between the gas and the liquid.

[0031] During the process of using the device for distillation, the electric push rod 7 is intermittently opened to allow the sealing plate 8 to periodically seal the first liquid hole on the partition plate 5, thereby reducing the time for the liquid to flow in the tower body 1, prolonging the contact time between the gas and the liquid, and ensuring that the distillation is fully carried out. After the raw material mixture is processed, the electric control valve in the feed pipe 101 is closed, the feeding of the raw material mixture into the tower body 1 is stopped, and all the sealing plates 8 are released from the blockage of the first liquid hole on the partition plate 5, and the liquid in the tower body 1 is discharged, and then the electric control valves in the exhaust pipe 102 and the discharge pipe 103 are closed.

[0032] In a further embodiment, in combination Figure 2-Figure 4 As shown, it also includes: liquid guiding tubes 2, the number of which is consistent with the number of first tower plates 3, all of which are fixedly connected and connected to the tower body 1, the liquid guiding tube 2 located on the uppermost side is connected to the feed pipe 101, and the remaining liquid guiding tubes 2 are respectively connected to adjacent liquid flow ports 301; the liquid guiding tubes 2 are composed of two arc-shaped tubes and a joint, the arc-shaped tubes are connected to the joint, and a plurality of openings are provided on the arc-shaped tubes; after the liquid enters the first liquid guiding tube 2 through the feed pipe 101, the liquid is guided by the liquid guiding tube 2, so that the liquid is evenly dispersed on the first first tower plate 3, thereby improving the degree of uniform contact between the liquid and the gas, and the principles of the remaining liquid guiding tubes 2 are the same.

[0033] In the process of using a distillation tower to fractionate the raw material mixture, the height of the liquid level on each tower plate will fluctuate under the action of pressure. When the height of the liquid level increases, the distance between the surface of the liquid and the upper tower plate decreases. At this time, the impact force generated by the gas will break through the liquid layer on the tower plate and entrain the liquid into the upper tower plate, which will cause liquid flooding. Conversely, if the height of the liquid level decreases, the time for the gas to pass through the liquid is reduced, and at the same time, the resistance of the liquid to the gas is reduced, causing the impact force generated by the gas to increase, which will also cause the gas to break through the liquid layer on the tower plate and push the upper liquid upward, causing the liquid to enter the upper tower plate, which will also cause liquid flooding. The liquid flooding phenomenon will prevent the gas-liquid two phases from performing normal material and heat exchange on the tower plate or filler, that is, the high-boiling point liquid that should have been separated on the lower tower plate is entrained to the upper tower plate, causing the liquid composition of the upper tower plate to change, the product purity to decrease, and then the separation efficiency to decrease.

[0034] In a further embodiment, in combination Figure 3-Figure 9 As shown, it also includes: an adjusting mechanism, the number of which is consistent with the number of the first tower plates 3, all of which are arranged in the tower body 1, and are used to change the exhaust volume of the air distribution shell 6, the adjusting mechanism includes: an adjusting shell 21, the number of which is consistent with the number of the air distribution shells 6 on the same first tower plate 3, which are rotatably connected to the adjacent air distribution shells 6, and are used to block the air distribution shells 6, and the air distribution shells 6 are slidably connected to the first tower plate 3; connecting rods 22, which are distributed at intervals and are slidably connected in the tower body 1; a second tower plate 23, which is fixed between all the connecting rods 22, and the second tower plate 23 is provided with a plurality of second through holes, and the first through holes of the first tower plate 3 correspond to the second through holes of the second tower plate 23 one by one; a driving component, the number of which is consistent with the number of the adjusting shells 21, which are respectively arranged on the adjusting shells 21, and are used to drive the adjusting shells 21 to rotate.

[0035] In the above scheme, the purpose is to control the exhaust volume of the air distribution shell 6 according to the height of the liquid level on the first tower plate 3; in this embodiment, the air distribution shell 6 and the adjustment shell 21 are both cylinders, both of which are provided with circumferentially distributed exhaust ports, the adjustment shell 21 is located inside the air distribution shell 6, and the second tower plate 23 is located on the lower side of the connecting rod 22, and initially there is a gap between the second tower plate 23 and the adjacent first tower plate 3, that is, the two are not in contact; initially, the air distribution shell 6 is located in the adjacent first through hole on the first tower plate 3, and the adjustment shell 21 blocks the exhaust port of the air distribution shell 6.

[0036] Combination Figure 2 , Figure 4 and Figure 7-10As shown, the driving assembly includes: a driving rod 31, which is splined to the adjusting shell 21; a supporting ring 32, which is fixed to the first tower plate 3, and the driving rod 31 is slidably connected to the supporting ring 32, and the supporting ring 32 is slidably connected to the second tower plate 23, and the second tower plate 23 is provided with a first groove 2301 and a second groove 2302, the first groove 2301 is connected to the second groove 2302, the first groove 2301 and the second groove 2302 are both used to guide the driving rod 31, and the first groove 2301 is an inclined groove; the connecting rod 22 is fixed with a float 41.

[0037] In the above scheme, the support ring 32 is located on the lower side of the adjacent first tower plate 3 and in the adjacent second through hole on the second tower plate 23; the first groove 2301 is an inclined groove, and the driving rod 31 is initially located on the upper side of the first groove 2301; the second groove 2302 is a straight groove, and the driving rod 31 is displaced by the squeezing of the driving rod 31 by the first groove 2301, and the second groove 2302 is located on the lower side of the first groove 2301; the float 41 is used to monitor the liquid height on the first tower plate 3.

[0038] Combination Figure 8 and Fig.11 As shown, the second tower plate 23 is provided with a plurality of third grooves 2303, and the number of the third grooves 2303 is consistent with the number of the second grooves 2302. The third grooves 2303 are inclined grooves. The driving rod 31 is squeezed by the third grooves 2303 to deflect the driving rod 31. The upper side of the third groove 2303 is connected with the lower side of the second groove 2302 and is used to guide the driving rod 31. The third groove 2303 and the first groove 2301 are symmetrically distributed. The third groove 2303 is an inclined groove, and the second groove 2302 is located between the first groove 2301 and the third groove 2303.

[0039] Working process: In the process of the gas in the tower body 1 slowly moving from bottom to top, taking the parts on the fourth first tower plate 3 as an example, the gas moves upward into the adjusting shell 21. As the gas pressure gradually increases, the gas pushes the adjusting shell 21 to move upward, and the adjusting shell 21 drives the gas distribution shell 6 to move upward, so that the gas distribution shell 6 slowly moves out of the first through hole of the first tower plate 3. In this process, since the first tower plate 3 cannot move, that is, the driving rod 31 and the support ring 32 cannot move up and down, the adjusting shell 21 and the driving rod 31 move relative to each other.

[0040] As the gas in the tower body 1 slowly moves from bottom to top, the liquid height on the first tower tray 3 continues to increase until the liquid surface contacts the float 41. The liquid then pushes the float 41 to move upward, and the float 41 drives the second tower tray 23 to move via the connecting rod 22, thereby causing the second tower tray 23 to move relative to the first tower tray 3.

[0041] During the upward movement of the second tower plate 23, the second tower plate 23 squeezes the driving rod 31 through the first groove 2301 thereon, so that the driving rod 31 slides along the support ring 32, and the driving rod 31 drives the adjusting shell 21 to rotate, and the adjusting shell 21 gradually releases the blockage of the exhaust port on the air distribution shell 6. At this time, the gas in the adjusting shell 21 flows to the upper side of the first tower plate 3 through the exhaust port thereon and the exhaust port of the air distribution shell 6, so that the gas and the liquid exchange heat. As the liquid height on the first tower plate 3 gradually increases, the second tower plate 23 moves upward, and the driving rod 31 slides along the first groove 2301, so that the connecting area between the exhaust port on the adjusting shell 21 and the exhaust port on the air distribution shell 6 gradually increases, thereby increasing the amount of gas entering the liquid, thereby ensuring sufficient contact between the liquid and the gas.

[0042] As the liquid height gradually increases, when the driving rod 31 enters the second groove 2302, the connection area between the exhaust port on the regulating shell 21 and the exhaust port on the gas distribution shell 6 is the largest, and the gas discharge volume corresponds to the liquid height. At this time, the sealing plate 8 in the above embodiment blocks the first liquid hole of the adjacent partition plate 5, and the liquid height on the first tower plate 3 will no longer change, that is, the connection area between the exhaust port on the regulating shell 21 and the exhaust port on the gas distribution shell 6 remains unchanged. After the liquid level on all the first tower plates 3 reaches the specified height, stop adding liquid to the tower body 1.

[0043] After the first liquid holes of all partition plates 5 are blocked for a period of time, all sealing plates 8 release the blockage of the first liquid holes on adjacent partition plates 5. At this time, the raw material mixture is added into the tower body 1 and the liquid in the tower body 1 is discharged. During this process, the liquid height on each first tower plate 3 will fluctuate slightly.

[0044] If the height of the liquid rises, the float 41 continues to move upward and causes the driving rod 31 to enter the third groove 2303. After the driving rod 31 enters the third groove 2303, the third groove 2303 squeezes the driving rod 31, causing the driving rod 31 to slide in the opposite direction along the support ring 32. The driving rod 31 drives the adjusting shell 21 to slide in the opposite direction, and the connecting area between the exhaust port on the adjusting shell 21 and the exhaust port on the gas distribution shell 6 gradually decreases, thereby reducing the gas discharge amount, thereby avoiding that when the liquid height is too large, the distance between the liquid surface and the upper first tower plate 3 is too small, resulting in liquid flooding, thereby affecting the efficiency of distillation.

[0045] If the height of the liquid drops, the float 41 moves downward and causes the driving rod 31 to enter the first groove 2301. The driving rod 31 slides along the first groove 2301, so that the connection area between the exhaust port on the regulating shell 21 and the exhaust port on the gas distribution shell 6 gradually decreases, thereby reducing the impact force exerted by the gas on the liquid, and thereby reducing the probability of the gas carrying the liquid up.

[0046] By controlling the gas discharge amount according to the liquid height, the efficiency of the distillation is ensured. After the distillation is completed, the liquid height gradually decreases, and the float 41 moves downward and resets, so that the driving rod 31 rotates and resets, and the adjusting shell 21 re-blocks the exhaust port of the gas distribution shell 6. At the same time, the adjusting shell 21 and the gas distribution shell 6 move downward and reset under the action of gravity, so that the gas distribution shell 6 enters the first through hole of the first tower plate 3 again.

[0047] In a further embodiment, in combination Fig.11 As shown, a plurality of guide plates 51 are fixedly connected to the first tray 3, and a second liquid hole is arranged on the lower side of the guide plate 51. The second liquid hole is used to make the liquid on both sides of the guide plate 51 on the first tray 3 flow to each other, and the lower side of the second liquid hole on the guide plate 51 is parallel to the upper side of the first tray 3; the guide plate 51 is wavy, and the guide plate 51 is used to guide the rising gas and extend its upward movement path, thereby increasing the contact time between the gas and the liquid, ensuring that the gas and the liquid are fully in contact, and the distance between two adjacent wave peaks on the guide plate 51 increases from top to bottom. When the gas passes through the lower part of the guide plate 51, the gas moves upward along the inclined surface of the guide plate 51. At this time, the interception effect of the guide plate 51 on the gas is small, which reduces the accumulation of gas at the bend of the guide plate 51 and ensures the normal flow of the gas. As the gas gradually moves upward, the guide plate 51 The interception effect gradually increases, further increasing the contact time between the gas and the liquid. At the same time, the gas is guided through the upper part of the guide plate 51, so that the range covered by the gas in the horizontal direction is increased, thereby improving the mixing degree of the gas and the liquid; a plurality of interception bars 52 are arranged on the guide plate 51, and the interception bars 52 are used to intercept the passing gas, further change the flow direction of the gas, further mix the gas and liquid between the two adjacent guide plates 51, make the gas and liquid fully contact, and enhance the effect of gas and liquid separation; all the interception bars 52 on the same guide plate 51 are staggered in the vertical direction and spaced in the horizontal direction. In the vertical direction, the middle part of the upper interception bar 52 corresponds to the gap between the two adjacent interception bars 52 on the lower side, further changing the flow direction of the gas and promoting the full mixing of the gas and the liquid.

[0048] The technical principles of the embodiments of the present invention are described above in conjunction with specific embodiments. These descriptions are only for explaining the principles of the embodiments of the present invention and cannot be interpreted in any way as limiting the protection scope of the embodiments of the present invention. Based on the explanations herein, those skilled in the art can think of other specific implementation methods of the embodiments of the present invention without creative work, and these methods will fall within the protection scope of the embodiments of the present invention.

Claims

1. A device for MTBE production and liquefied gas fractionation, characterized in that: The tower body (1) comprises a tower body (1), wherein the upper side of the tower body (1) is connected to a feed pipe (101) and an exhaust pipe (102), and the lower side of the tower body (1) is connected to a liquid discharge pipe (103). The interior of the tower body (1) is fixedly connected to first tower plates (3) distributed at intervals, one side of the first tower plate (3) is provided with a liquid flow port (301), a side of the first tower plate (3) close to the liquid flow port (301) is fixedly connected to a partition plate (5), the first tower plate (3) is provided with a plurality of first through holes, and the first tower plate (3) has a first through hole. An air distribution shell (6) is arranged in the through hole, and the tower body (1) is installed with electric push rods (7) whose number is the same as that of the first tower plates (3). The electric push rods (7) are located on a side of the adjacent first tower plate (3) close to the liquid flow port (301). The partition plate (5) is provided with a first liquid passage hole, and a sealing plate (8) is hingedly connected to the telescopic end of the electric push rod (7). The sealing plate (8) is rotatably connected to the adjacent partition plate (5), and the sealing plate (8) is used to seal the first liquid passage hole of the adjacent partition plate (5).

2. A device for MTBE production and liquefied gas fractionation according to claim 1, characterized in that: Also included are: The number of liquid guide tubes (2) is the same as the number of the first tower plates (3), and they are all fixedly connected to and connected to the tower body (1). The liquid guide tube (2) located at the uppermost side is connected to the feed pipe (101), and the remaining liquid guide tubes (2) are respectively connected to the adjacent liquid flow ports (301).

3. The device for MTBE production and liquefied gas fractionation according to claim 1, characterized in that: Also included are: The number of regulating mechanisms is the same as the number of the first tower plates (3), and both are arranged in the tower body (1), and are used to change the exhaust volume of the air distribution shell (6), and the regulating mechanisms include: The number of regulating shells (21) is the same as the number of the air distribution shells (6) on the same first tower plate (3), and they are respectively rotatably connected to adjacent air distribution shells (6) to seal the air distribution shells (6). The air distribution shells (6) are slidably connected to the first tower plate (3); Connecting rods (22) are distributed at intervals and are all slidably connected to the tower body (1); a second tower plate (23) fixedly connected between all the connecting rods (22), the second tower plate (23) being provided with a plurality of second through holes, the first through holes of the first tower plate (3) corresponding one to one with the second through holes of the second tower plate (23); The driving components, the number of which is the same as the number of the adjusting shells (21), are respectively arranged on the adjusting shells (21) and are used to drive the adjusting shells (21) to rotate.

4. A device for MTBE production and liquefied gas fractionation according to claim 3, characterized in that: The drive assembly comprises: A driving rod (31) spline-connected to the adjusting housing (21); A support ring (32) is fixedly connected to the first tower plate (3), and the driving rod (31) is slidably connected to the support ring (32), and the support ring (32) is slidably connected to the second tower plate (23), and the second tower plate (23) is provided with a first groove (2301) and a second groove (2302), the first groove (2301) is communicated with the second groove (2302), the first groove (2301) and the second groove (2302) are both used to guide the driving rod (31), and the first groove (2301) is an inclined groove.

5. A device for MTBE production and liquefied gas fractionation according to claim 4, characterized in that: The connecting rod (22) is fixedly connected to a float (41).

6. A device for MTBE production and liquefied gas fractionation according to claim 4, characterized in that: The second tower plate (23) is provided with a plurality of third grooves (2303), and the number of the third grooves (2303) is consistent with the number of the second grooves (2302); the third grooves (2303) are connected to the second grooves (2302) and are used to guide the driving rod (31); the third grooves (2303) are inclined grooves, and the second grooves (2302) are located between the first grooves (2301) and the third grooves (2303).

7. The device for MTBE production and liquefied gas fractionation according to claim 1, characterized in that: A plurality of guide plates (51) are fixedly connected to the first tower tray (3), and a second liquid passage hole is provided on the lower side of the guide plate (51).

8. The device for MTBE production and liquefied gas fractionation according to claim 7, characterized in that: The guide plate (51) is wave-shaped, and the distance between two adjacent wave crests on the guide plate (51) decreases from bottom to top.

9. The device for MTBE production and liquefied gas fractionation according to claim 7, characterized in that: A plurality of interception bars (52) are provided on the guide plate (51).

10. The device for MTBE production and liquefied gas fractionation according to claim 9, characterized in that: All the intercepting bars (52) on the same guide plate (51) are distributed in a staggered manner in the vertical direction and are distributed in an interval manner in the horizontal direction.

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