An apparatus for MTBE production and liquefied gas fractionation

Abstract

This invention relates to the field of fractionation tower technology, and more particularly to an apparatus for MTBE production and liquefied petroleum gas (LPG) fractionation. The apparatus includes a tower body connected to a feed pipe, an exhaust pipe, and a drain pipe. The tower body is fixedly connected to spaced-apart first trays, each tray having a liquid outlet. Each first tray is fixedly connected to a partition plate and has several first through holes. A gas distribution shell is disposed within each of the first through holes. The tower body is equipped with an electric actuator in the same number as the first trays. Each partition plate has a first liquid passage hole. A sealing plate is hinged to the telescopic end of each electric actuator, and the sealing plate is rotatably connected to an adjacent partition plate. This invention intermittently opens the electric actuators, causing the sealing plate to periodically block the first liquid passage holes on the partition plate, reducing the time the liquid flows within the tower body, extending the gas-liquid contact time, and ensuring thorough fractionation.

Description

Technical Field

[0001] This invention relates to the field of fractionation tower technology, and more particularly to an apparatus for MTBE production and liquefied gas fractionation. Background Technology

[0002] Methyl tert-butyl ether (MTBE), a widely used organic compound in the chemical industry, 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 in the presence of an acidic catalyst. The production process of MTBE involves steps such as reaction, separation, and purification. A fractionation column is used to separate the MTBE mixture (separating C4 hydrocarbons from MTBE and methanol). The bottom product of this process is a mixture of MTBE and unreacted methanol, while the top product is unreacted C4 hydrocarbons.

[0003] Fractionating towers are used in MTBE production, and similar towers are used in the fractionation of liquefied petroleum gas (LPG), with a close relationship between the two. LPG is a mixture of various hydrocarbons, and fractionation yields different fractions. The bottom product of LPG fractionation is C4 hydrocarbons, including isobutylene. Thus, LPG fractionation provides feedstock for MTBE production.

[0004] Whether it's the fractionation of MTBE mixtures or liquefied petroleum gas (LPG) fractionation, the basic principle of gas-liquid separation in the fractionation column is the same. After the feed (gas-liquid mixture) is added to the column, it forms gas and liquid phases. The gas phase moves upward, and the liquid phase moves downward, separating through each tray. During this process, the downward-moving liquid phase is constantly in a flowing state, resulting in insufficient gas-liquid contact time and inadequate heat exchange between the two phases. This reduces separation efficiency, prevents the product from meeting the expected purity requirements, and ultimately leads to feed loss. Summary of the Invention

[0005] In order to overcome the shortcomings mentioned in the background art, the present invention provides an apparatus for MTBE production and liquefied gas fractionation.

[0006] Technical Solution: An apparatus for MTBE production and liquefied petroleum gas fractionation includes a tower body. A feed pipe and an exhaust pipe are connected to the upper side of the tower body, and a drain pipe is connected to the lower side of the tower body. First trays are fixedly connected inside the tower body at intervals. A liquid outlet is provided on one side of each first tray. A partition plate is fixedly connected to the side of each first tray near the liquid outlet. Each first tray has several first through holes, and a gas distribution shell is provided within each of the first through holes. An electric push rod, the same number as the first trays, is installed inside the tower body. The electric push rods are located on the side of adjacent first trays near the liquid outlet. Each partition plate has a first liquid passage hole. A sealing plate is hinged to the telescopic end of each electric push rod. The sealing plate is rotatably connected to the adjacent partition plate and is used to seal the first liquid passage hole of the adjacent partition plate.

[0007] More preferably, it also includes:

[0008] The number of liquid guide pipes is the same as the number of the first trays. They are all fixed and connected to the tower body. The liquid guide pipe located at the top is connected to the feed pipe, and the remaining liquid guide pipes are connected to the adjacent liquid outlets.

[0009] More preferably, it also includes:

[0010] The number of regulating mechanisms is the same as the number of the first trays, all of which are disposed within the tower body and are used to change the exhaust volume of the gas distribution shell. Each regulating mechanism includes:

[0011] The number of regulating shells is the same as the number of gas distribution shells on the same first tray, and they are rotatably connected to the adjacent gas distribution shells to block the gas distribution shells. The gas distribution shells are slidably connected to the first tray.

[0012] The connecting rods are spaced apart and are all slidably connected to the tower body;

[0013] The second tray is fixed between all the connecting rods. The second tray is provided with a plurality of second through holes. The first through holes of the first tray correspond one-to-one with the second through holes of the second tray.

[0014] The number of drive components is the same as the number of adjustment shells, and they are respectively disposed on the adjustment shells to drive the adjustment shells to rotate.

[0015] More preferably, the driving component includes:

[0016] The drive rod is splinedly connected to the adjustment housing;

[0017] A support ring is fixed to the first tray, and the drive rod is slidably connected to the support ring. The support ring is slidably connected to the second tray. The second tray is provided with a first groove and a second groove. The first groove and the second groove are connected. Both the first groove and the second groove are used to guide the drive rod. The first groove is an inclined groove.

[0018] More preferably, the connecting rod is fixedly connected to a float.

[0019] More preferably, the second tray is provided with a plurality of third slots, and the number of the third slots is the same as the number of the second slots. The third slots are connected to the second slots and are used to guide the drive rod. The third slots are inclined slots, and the second slots are located between the first slots and the third slots.

[0020] More preferably, a plurality of guide plates are fixedly connected to the first tray, and a second liquid passage hole is provided on the lower side of the guide plates.

[0021] More preferably, the guide plate is wavy, and the distance between two adjacent wave crests on the guide plate decreases from bottom to top.

[0022] More preferably, the guide plate is provided with a plurality of interception strips.

[0023] More preferably, all the intercepting strips on the same guide plate are staggered in the vertical direction and spaced apart in the horizontal direction.

[0024] 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 block the first liquid passage hole on the partition plate, thereby reducing the time that the liquid flows in the tower body, extending the contact time between gas and liquid, and ensuring that fractionation is fully carried out.

[0025] By guiding the liquid through the liquid guide tube, the liquid is evenly dispersed on the first tray, thereby improving the degree of uniform contact between the liquid and the gas.

[0026] By monitoring the liquid level on the first tray using a float, the rotation angle of the regulating shell is controlled, thereby adjusting the communication area between the regulating shell and the gas distribution shell. This ensures that the gas discharge corresponds to the liquid level, preventing flooding and guaranteeing fractionation efficiency.

[0027] By guiding the gas through the deflector, the gas movement path is extended and the contact time between the gas and the liquid is increased, ensuring that the gas and liquid are fully separated, thereby improving the fractionation effect.

[0028] By using interception bars to turbulent the gas flow, the gas is evenly distributed in the liquid, ensuring complete separation of the gas and liquid, thereby improving the fractionation effect. Attached Figure Description

[0029] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0030] Figure 2 This is a three-dimensional structural diagram of the components inside the tower body of the present invention;

[0031] Figure 3 This is a three-dimensional structural diagram of the liquid guide tube and the first tray of the present invention;

[0032] Figure 4 This is a three-dimensional structural diagram of the air-distributing shell and electric push rod of the present invention;

[0033] Figure 5 This is a three-dimensional structural diagram of the first tray and the liquid outlet of the present invention;

[0034] Figure 6 This is an exploded three-dimensional view of the components on the first tray of the present invention;

[0035] Figure 7 This is a three-dimensional structural diagram of the air-distribution shell in a special state according to the present invention;

[0036] Figure 8 This is a three-dimensional structural diagram of the drive rod and support ring of the present invention;

[0037] Figure 9 This is a three-dimensional structural diagram of the adjusting shell of the present invention;

[0038] Figure 10 This is a three-dimensional structural diagram of the second and third grooves of the present invention;

[0039] Figure 11 This is a three-dimensional structural diagram of the guide plate and interception bar of the present invention.

[0040] In the diagram: 1. Tower body; 101. Feed pipe; 102. Exhaust pipe; 103. Drain pipe; 2. Liquid guide pipe; 3. First tray; 301. Liquid outlet; 5. Partition plate; 6. Gas distribution shell; 7. Electric push rod; 8. Sealing plate; 21. Adjusting shell; 22. Connecting rod; 23. Second tray; 2301. First slot; 2302. Second slot; 2303. Third slot; 31. Drive rod; 32. Support ring; 41. Float; 51. Guide plate; 52. Interception bar. Detailed Implementation

[0041] Although the invention may be described with respect to specific applications or industries, those skilled in the art will recognize its broader applicability. Any numerical designations such as "first" or "second" are merely illustrative and are not intended to limit the scope of the invention in any way.

[0042] An apparatus for MTBE production and liquefied gas fractionation, combined with Figures 1-6 As shown, the tower body includes a tower body 1. 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 drain pipe 103. The tower body 1 is internally fixed with spaced first trays 3. One side of the first tray 3 is provided with a liquid outlet 301. The side of the first tray 3 near the liquid outlet 301 is fixed with a partition plate 5. The first tray 3 is provided with several first through holes. The first through holes of the first tray 3 are provided with a gas distribution shell 6. The tower body 1 is equipped with an electric push rod 7 in the same number as the first tray 3. The electric push rod 7 is located on the side of the adjacent first tray 3 near the liquid outlet 301. The partition plate 5 is provided with a first liquid passage 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. The sealing plate 8 is used to block the first liquid passage hole of the adjacent partition plate 5.

[0043] The above solution aims to solve the problem of insufficient separation between the gas and liquid phases caused by the constant flow of liquid in existing fractionation towers. In this embodiment, there are four first trays 3, which are evenly spaced. Adjacent liquid outlets 301 are staggered to prolong the residence time of the material on the first tray 3. A liquid level sensor is installed on the upper side of the partition plate 5 to facilitate the identification of the liquid level on the first tray 3. The electric push rod 7 is an existing device, and the outer side of the electric push rod 7 is coated with an anti-corrosion coating to reduce the damage to the electric push rod 7 caused by the material inside the tower body 1 and extend its service life. 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 tray 3; a sealing gasket is provided on the periphery 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; an electrically controlled valve is installed in the feed pipe 101, the exhaust pipe 102 and the drain pipe 103, and the feed pipe 101 is connected to the external raw material mixture storage tank (the raw material mixture refers to MTBE mixture or liquefied gas); initially, the lowermost sealing plate 8 seals 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.

[0044] Workflow: When fractionating MTBE mixture (or liquefied petroleum gas) using this device, open the electrically controlled valves in the feed pipe 101 and exhaust pipe 102, and add the raw material mixture (i.e., MTBE mixture or liquefied petroleum gas) into the column body 1. The raw material mixture will separate into gas and liquid, with the liquid falling onto the first tray 3 (from top to bottom). At this time, the liquid falls onto the second tray 3 through the first liquid passage hole and the first liquid outlet 301 of the first partition plate 5. This process is repeated until the liquid flows onto the fourth tray 3. Since the first liquid passage hole of the fourth partition plate 5 is blocked... Therefore, the liquid in the fourth first tray 3 cannot flow downwards, 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 tray 3. When 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 passage hole of the third partition plate 5. At this time, the liquid height on the third first tray 3 gradually increases. This process is repeated until the liquid level on the first first tray 3 reaches the specified height, at which point the addition of raw material mixture to the tower body 1 stops. At this time, the first liquid passage holes of all partition plates 5 are in a blocked state.

[0045] During the process of adding the raw material mixture into the tower body 1, the separated gas from the raw material mixture will move upward. When the gas pressure on the lower side of the fourth first tray 3 is greater than the resistance to the movement of the gas distribution shell 6, the gas pushes the upper gas distribution shell 6 on the fourth first tray 3 to move, so that the gas moves through the gas distribution shell 6 to the upper side of the fourth first tray 3. The gas comes into contact with the liquid on the upper side of the fourth first tray 3 and exchanges heat. During this process, the gas continues to move upward and pass through the liquid. This process is repeated. The gas passes through the four first trays 3 and comes into contact with the liquid on the four first trays 3. After the gas moves into the exhaust pipe 102, it is discharged from the exhaust pipe 102. During the process of the gas passing through the liquid, the height of the liquid gradually increases until the liquid level reaches the specified height and then the addition of the raw material mixture is stopped.

[0046] As the gas passes through the four first trays 3, the liquid on all the first trays 3 changes from flowing downwards to no longer flowing downwards. The passing gas and liquid come into full contact, allowing for sufficient heat exchange between the gas and liquid, improving separation efficiency, ensuring sufficient fractionation, and as the gas and liquid are fully separated, the liquid components are further purified, reducing the residue of excess substances in the liquid.

[0047] After the first liquid passage 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 continued to be added into the tower body 1. At the same time, all electric push rods 7 are controlled so that the extension and retraction ends of the electric push rods 7 drive the adjacent blocking plates 8 to move and release the blockage of the first liquid passage holes on the adjacent partition plates 5. At this time, the liquid on the first tray 3 flows down along the first liquid passage hole on the first partition plate 5 and the adjacent liquid outlet 301 to the second tray 3. This process is repeated. The liquid on the fourth tray 3 flows down along the first liquid passage hole on the adjacent partition plate 5 and the adjacent liquid outlet 301 into the drain pipe 103, and the fractionated liquid is discharged. The liquid on all trays 3 is in a flowing state, and the liquid on the first trays 3 is replaced. During this process, the gas in the tower body 1 is always discharged to the outside through the exhaust pipe 102, that is, fractionation is always carried out and heat exchange is continuously carried out to ensure the efficiency of fractionation.

[0048] After the liquid flows on the first tray 3 for a period of time, all the electric push rods 7 are controlled to move the adjacent sealing plates 8 by their extension and retraction ends. The sealing plates 8 then block the first liquid passage holes on the adjacent partition plates 5 again, and at the same time, the addition of raw material mixture into the tower body 1 is stopped. All the liquid on the first tray 3 changes from downward flow to no longer downward flow, so that the gas and the still liquid can fully contact each other, thereby ensuring sufficient heat exchange between the gas and the liquid.

[0049] During the fractionation process using this device, the electric push rod 7 is intermittently activated to periodically block the first liquid passage hole on the partition plate 5 with the sealing plate 8, reducing the time the liquid flows in the tower body 1, extending the contact time between the gas and the liquid, and ensuring that the fractionation is fully carried out. After the raw material mixture is processed, the electric control valve in the feed pipe 101 is closed to stop the feeding of the raw material mixture into the tower body 1, and all the sealing plates 8 are released from blocking the first liquid passage hole on the partition plate 5 to discharge the liquid in the tower body 1. Then the electric control valves in the exhaust pipe 102 and the drain pipe 103 are closed.

[0050] In a further embodiment, combined with Figures 2-4 As shown, it also includes: liquid guide pipes 2, the number of which is the same as the number of the first trays 3, all of which are fixed and connected to the tower body 1. The liquid guide pipe 2 located on the uppermost side is connected to the feed pipe 101, and the remaining liquid guide pipes 2 are connected to the adjacent liquid outlets 301 respectively. The liquid guide pipe 2 consists of two arc-shaped pipes and a connector. The arc-shaped pipes are connected to the connector, and several openings are provided on the arc-shaped pipes. After the liquid enters the first liquid guide pipe 2 through the feed pipe 101, the liquid is guided by the liquid guide pipe 2, so that the liquid is evenly dispersed on the first tray 3, which improves the degree of uniform contact between the liquid and the gas. The remaining liquid guide pipes 2 are of the same principle.

[0051] During the fractionation of a feed mixture using a fractionation column, the liquid level on each tray fluctuates under pressure. When the liquid level increases, the distance between the liquid surface and the upper tray decreases. The impact force generated by the gas at this time can break through the liquid layer on the tray and carry liquid into the upper tray, causing flooding. Conversely, if the liquid level decreases, the time it takes for the gas to pass through the liquid is reduced, and the resistance of the liquid to the gas decreases, resulting in an increased impact force from the gas. This can also cause the gas to break through the liquid layer on the tray and push the upper liquid upwards, causing flooding as well. Flooding prevents the gas and liquid phases from exchanging matter and heat normally on the trays or packing. High-boiling-point liquids that should be separated on the lower trays are carried to the upper trays, altering the liquid composition of the upper trays, reducing product purity, and consequently decreasing separation efficiency.

[0052] In a further embodiment, combined with Figures 3-9 As shown, it also includes: an adjustment mechanism, the number of which is the same as the number of the first trays 3, all of which are set inside the tower body 1, used to change the exhaust volume of the gas distribution shell 6. The adjustment mechanism includes: an adjustment shell 21, the number of which is the same as the number of gas distribution shells 6 on the same first tray 3, which are rotatably connected to adjacent gas distribution shells 6, used to seal the gas distribution shells 6, and the gas distribution shells 6 are slidably connected to the first tray 3; connecting rods 22, which are spaced apart and slidably connected inside the tower body 1; a second tray 23, which is fixed between all the connecting rods 22, and the second tray 23 is provided with several second through holes, the first through holes of the first tray 3 and the second through holes of the second tray 23 are one-to-one; and a drive assembly, the number of which is the same as the number of the adjustment shells 21, which are respectively set on the adjustment shells 21, used to drive the adjustment shells 21 to rotate.

[0053] In the above scheme, the aim is to control the exhaust volume of the gas distribution shell 6 according to the height of the liquid level on the first tray 3. In this embodiment, both the gas distribution shell 6 and the regulating shell 21 are cylindrical, and both are provided with circumferentially distributed exhaust ports. The regulating shell 21 is located inside the gas distribution shell 6, and the second tray 23 is located below the connecting rod 22. Initially, there is a gap between the second tray 23 and the adjacent first tray 3, that is, the two are not in contact. Initially, the gas distribution shell 6 is located in the adjacent first through hole on the first tray 3, and the regulating shell 21 blocks the exhaust port of the gas distribution shell 6.

[0054] Combination Figure 2 , Figure 4 and Figures 7-10As shown, the drive assembly includes: a drive rod 31, splinedly connected to the adjusting shell 21; a support ring 32, fixedly connected to the first tray 3, with the drive rod 31 and the support ring 32 slidably connected, and the support ring 32 slidably connected to the second tray 23, the second tray 23 being provided with a first groove 2301 and a second groove 2302, the first groove 2301 and the second groove 2302 communicating with each other, both the first groove 2301 and the second groove 2302 being used to guide the drive rod 31, the first groove 2301 being an inclined groove; and a connecting rod 22 fixedly connected to a float 41.

[0055] In the above scheme, the support ring 32 is located on the lower side of the adjacent first tray 3 and in the adjacent second through hole on the second tray 23; the first groove 2301 is an inclined groove, and initially the drive rod 31 is located on the upper side of the first groove 2301; the second groove 2302 is a straight groove, and the drive rod 31 is displaced by the compression of 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 level on the first tray 3.

[0056] Combination Figure 8 and Figure 11 As shown, the second tray 23 is provided with a number of third grooves 2303, and the number of third grooves 2303 is the same as the number of second grooves 2302. The third grooves 2303 are inclined grooves. The drive rod 31 is deflected by the compression of the drive rod 31 by the third grooves 2303. The upper side of the third groove 2303 is connected to the lower side of the second groove 2302 and is used to guide the drive rod 31. The third grooves 2303 and the first groove 2301 are symmetrically distributed. The third grooves 2303 are inclined grooves, and the second groove 2302 is located between the first groove 2301 and the third groove 2303.

[0057] Workflow: During the process of gas slowly moving upward in the tower body 1, taking the parts on the fourth first tray 3 as an example, the gas moves upward into the regulating shell 21. As the gas pressure gradually increases, the gas pushes the regulating shell 21 to move upward. The regulating 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 tray 3. During this process, since the first tray 3 cannot move, that is, the drive rod 31 and the support ring 32 cannot move up and down, the regulating shell 21 and the drive rod 31 move relative to each other.

[0058] As the gas slowly moves upward inside the tower 1, the liquid level on the first tray 3 continues to increase until the liquid surface contacts the float 41. The liquid then pushes the float 41 upward, and the float 41 moves the second tray 23 via the connecting rod 22, thus causing the second tray 23 to move relative to the first tray 3.

[0059] As the second tray 23 moves upward, it compresses the drive rod 31 through the first groove 2301, causing the drive rod 31 to slide along the support ring 32. The drive rod 31 drives the regulating shell 21 to rotate, and the regulating shell 21 gradually releases the blockage on the exhaust port of the gas distribution shell 6. At this time, the gas in the regulating shell 21 flows to the upper side of the first tray 3 through its exhaust port and the exhaust port of the gas distribution shell 6, thus causing heat exchange between the gas and the liquid. As the liquid height on the first tray 3 gradually increases, the second tray 23 moves upward, and the drive rod 31 slides along the first groove 2301, gradually increasing the communication area between the exhaust port on the regulating shell 21 and the exhaust port on the gas distribution shell 6, thereby increasing the amount of gas entering the liquid, thus ensuring sufficient contact between the liquid and the gas.

[0060] As the liquid level gradually increases, when the drive rod 31 enters the second groove 2302, the communication area between the exhaust port on the regulating shell 21 and the exhaust port on the gas distribution shell 6 is at its maximum. The amount of gas discharged corresponds to the liquid level. At this time, the sealing plate 8 in the above embodiment blocks the first liquid passage hole of the adjacent partition plate 5, and the liquid level on the first tray 3 will no longer change. That is, the communication area between the exhaust port on the regulating shell 21 and the exhaust port on the gas distribution shell 6 remains unchanged until the liquid level on all the first trays 3 reaches the specified height, at which point the addition of liquid to the tower body 1 is stopped.

[0061] After the first liquid passage holes of all partition plates 5 are blocked for a period of time, all the blocking plates 8 are released from blocking the first liquid passage holes on the 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 level on each first tray 3 will fluctuate slightly.

[0062] If the liquid level rises, the float 41 continues to move upward and causes the drive rod 31 to enter the third groove 2303. After the drive rod 31 enters the third groove 2303, the third groove 2303 squeezes the drive rod 31, causing the drive rod 31 to slide in the opposite direction along the support ring 32. The drive rod 31 drives the regulating shell 21 to slide in the opposite direction. The communication 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 amount of gas discharged. This prevents the liquid level from being too high and the distance between the liquid surface and the first tray 3 on the upper side from being too small, which would lead to flooding and affect the efficiency of fractionation.

[0063] If the liquid level drops, the float 41 moves downward and the drive rod 31 enters the first groove 2301. The drive rod 31 slides along the first groove 2301, which gradually reduces the communication area between the exhaust port on the adjusting shell 21 and the exhaust port on the air distribution shell 6, thereby reducing the impact force exerted by the gas on the liquid and thus reducing the probability of the gas carrying the liquid to rise.

[0064] By controlling the gas discharge rate based on the liquid height as described above, the efficiency of fractionation is ensured. After fractionation, the liquid height gradually decreases, and the float 41 moves downward to reset, thus causing the drive rod 31 to rotate and reset. The adjusting shell 21 re-seals 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 to reset under the action of gravity, allowing the gas distribution shell 6 to re-enter the first through hole of the first tray 3.

[0065] In a further embodiment, combined with Figure 11 As shown, several guide plates 51 are fixed to the first tray 3. A second liquid passage is provided on the lower side of each guide plate 51, allowing liquid to flow between the two sides of the guide plate 51 on the first tray 3. The lower side of the second liquid passage on the guide plate 51 is parallel to the upper side of the first tray 3. The guide plate 51 is wavy, guiding the rising gas and extending its upward path, thereby increasing the contact time between the gas and liquid and ensuring sufficient contact. The distance between two adjacent peaks on the guide plate 51 increases from top to bottom. When the gas passes the lower part of the guide plate 51, it moves upward along the slope of the guide plate 51. At this time, the interception effect of the guide plate 51 on the gas is small, reducing gas accumulation at the bends of the guide plate 51 and ensuring normal gas flow. As the gas gradually moves upward, the guide plate 51... The interception effect gradually increases, further increasing the contact time between gas and liquid. At the same time, the gas is guided by the upper part of the guide plate 51, increasing the area covered by the gas in the horizontal direction, thereby improving the mixing degree of gas and liquid. Several interception bars 52 are provided on the guide plate 51. The interception bars 52 are used to intercept the passing gas, further changing the flow direction of the gas, so that the gas and liquid between two adjacent guide plates 51 are further mixed, so that the gas and liquid are fully in contact, enhancing the separation effect of gas and liquid. All the interception bars 52 on the same guide plate 51 are staggered in the vertical direction and spaced apart in the horizontal direction. In the vertical direction, the middle of the upper interception bar 52 corresponds to the gap between two adjacent lower interception bars 52, further changing the flow direction of the gas and promoting full mixing of gas and liquid.

[0066] The technical principles of the embodiments of the present invention have been described above with reference to specific examples. These descriptions are merely for explaining the principles of the embodiments of the present invention and should not be construed as limiting the scope of protection of the embodiments of the present invention in any way. Based on the explanation herein, those skilled in the art can conceive of other specific embodiments of the present invention without creative effort, and these embodiments will all fall within the scope of protection of the embodiments of the present invention.

Claims

1. An apparatus for MTBE production and liquefied petroleum gas fractionation, characterized in that, The tower includes a tower body (1), with a feed pipe (101) and an exhaust pipe (102) connected to the upper side of the tower body (1) and a drain pipe (103) connected to the lower side of the tower body (1). The tower body (1) has a first tray (3) fixedly connected inside at intervals. A liquid outlet (301) is provided on one side of the first tray (3). A partition plate (5) is fixedly connected to the side of the first tray (3) near the liquid outlet (301). The first tray (3) is provided with a number of first through holes. A gas distribution shell (6) is provided in the first through holes of the first tray (3). The tower body (1) is equipped with an electric push rod (7) in the same number as the first tray (3). The electric push rod (7) is located on the side of the adjacent first tray (3) near the liquid outlet (301). The partition plate (5) is provided with a first liquid passage hole. The first liquid passage hole is located on the lower side of the partition plate (5). The lower side of the first liquid passage hole on the partition plate (5) is flush with the upper side of the adjacent first tray (3). 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). The sealing plate (8) is used to block the first liquid passage hole of the adjacent partition plate (5). When the first liquid passage hole of the partition plate (5) is blocked, the liquid in the first tray (3) cannot flow downward and its liquid level gradually rises.

2. The apparatus for MTBE production and liquefied petroleum gas fractionation according to claim 1, characterized in that, It also includes: The number of liquid guide pipes (2) is the same as the number of the first tray (3), and they are all fixed and connected to the tower body (1). The liquid guide pipe (2) located on the uppermost side is connected to the feed pipe (101), and the remaining liquid guide pipes (2) are connected to the adjacent liquid outlets (301).

3. The apparatus for MTBE production and liquefied petroleum gas fractionation according to claim 1, characterized in that, It also includes: The regulating mechanism, the number of which is the same as the number of the first trays (3), is set inside the tower body (1) and is used to change the exhaust volume of the gas distribution shell (6). The regulating mechanism includes: The number of regulating shells (21) is the same as the number of gas distribution shells (6) on the same first tray (3), and they are rotatably connected to the adjacent gas distribution shells (6) to block the gas distribution shells (6). The gas distribution shells (6) are slidably connected to the first tray (3). The connecting rods (22) are spaced apart and are all slidably connected to the tower body (1); The second tray (23) is fixed between all the connecting rods (22). The second tray (23) is provided with a plurality of second through holes. The first through hole of the first tray (3) corresponds one-to-one with the second through hole of the second tray (23). The number of drive components is the same as the number of adjustment shells (21), and they are respectively disposed on the adjustment shells (21) to drive the adjustment shells (21) to rotate.

4. The apparatus for MTBE production and liquefied petroleum gas fractionation according to claim 3, characterized in that, The driving component includes: The drive rod (31) is splinedly connected to the adjustment housing (21); A support ring (32) is fixed to the first tray (3), and the drive rod (31) is slidably connected to the support ring (32). The support ring (32) is slidably connected to the second tray (23). The second tray (23) is provided with a first groove (2301) and a second groove (2302). The first groove (2301) and the second groove (2302) are connected. The first groove (2301) and the second groove (2302) are both used to guide the drive rod (31). The first groove (2301) is an inclined groove.

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

6. An apparatus for MTBE production and liquefied petroleum gas fractionation according to claim 4, characterized in that, The second tray (23) is provided with a plurality of third slots (2303), and the number of the third slots (2303) is the same as the number of the second slots (2302). The third slots (2303) are connected to the second slots (2302) and are used to guide the drive rod (31). The third slots (2303) are inclined slots, and the second slots (2302) are located between the first slot (2301) and the third slots (2303).

7. An apparatus for MTBE production and liquefied petroleum gas fractionation according to claim 1, characterized in that, Several guide plates (51) are fixedly attached to the first tray (3), and a second liquid passage hole is provided on the lower side of the guide plate (51).

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

9. An apparatus for MTBE production and liquefied petroleum gas fractionation according to claim 7, characterized in that, The guide plate (51) is provided with several interception bars (52).

10. An apparatus for MTBE production and liquefied petroleum gas fractionation according to claim 9, characterized in that, All the intercepting strips (52) on the same guide plate (51) are staggered in the vertical direction and spaced apart in the horizontal direction.

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