A system and method for separating ortho-xylene from xylene

Abstract

The application discloses a system and method for separating o-xylene in xylene, relates to the technical field of petroleum processing, and aims to solve the technical problem that the existing o-xylene adsorption separation technology is forced to adopt a multi-stage redundant adsorption tower series connection design due to the insufficient selectivity of traditional materials, a high-complexity process network is formed, the cost soars, the system stability and efficiency are both reduced due to the 'wooden barrel effect', and the technology is difficult to meet the demand of modern chemical industry, comprising a rectifying assembly, a sealing assembly connected with the rectifying assembly, and a heating assembly located in the sealing assembly. The application drives the assembly, accelerates the assembly and heats the assembly, directly connects the adsorption plate with the sealing assembly and the rectifying assembly in a mode, adjusts the position of the adsorption plate, collects o-xylene particles, reduces unnecessary adsorption structures, maximally separates o-xylene, and improves the processing efficiency of the device.

Description

Technical Field

[0001] This invention relates to the field of petroleum processing technology, and more specifically, to a system and method for separating o-xylene from xylene. Background Technology

[0002] Separating o-xylene from xylene is an important topic in the petrochemical field. Since the three isomers of xylene (o-xylene, m-xylene, and para-xylene) have similar boiling points (144.4℃, 139.1℃, and 138.4℃, respectively), conventional distillation methods are difficult to separate and consume a lot of energy.

[0003] Existing separation technologies include distillation, adsorption separation, and crystallization separation. In practical applications, distillation technology can achieve preliminary separation of o-xylene from other isomers by increasing the number of trays (usually 100-150) and optimizing the reflux ratio (5-8). However, this method is energy-intensive and needs to be combined with other technologies to improve efficiency. Molecular sieve adsorption, on the other hand, utilizes the differences in adsorption selectivity of molecular sieves for different isomers, achieving separation through adsorption-desorption cycles. This method has high selectivity but requires periodic regeneration of the adsorbent, making it the most suitable for widespread application.

[0004] Existing o-xylene adsorption separation technology faces multiple technical challenges in practical industrial applications, becoming a core bottleneck restricting industrial upgrading. To compensate for the insufficient selectivity of traditional adsorption materials, industrial plants are forced to adopt a redundant series design of 8-12 adsorption towers. Each adsorption tower requires an independent and precise temperature-pressure-flow rate control system, forming a process network with complexity comparable to that of precision chemical engineering. This results in excessively high production and maintenance costs. Furthermore, in continuous production modes, the "barrel effect" of the multi-stage series architecture becomes increasingly prominent, with a single point of failure causing a complete shutdown, making it difficult to meet the high-efficiency and high-stability production requirements of modern chemical engineering. In view of this, we propose a system and method for separating o-xylene from xylene. Summary of the Invention

[0005] The purpose of this invention is to provide a system and method for separating o-xylene from xylene, in order to solve the technical problem that existing o-xylene adsorption separation technology is forced to adopt a multi-stage redundant adsorption tower series design due to insufficient selectivity of traditional materials, forming a highly complex process network, which leads to soaring costs and the "barrel effect" causing a double decrease in system stability and efficiency, making it difficult to meet the needs of modern chemical industry.

[0006] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a system and method for separating o-xylene from xylene, comprising a cooler, a cooling cylinder, and an inlet pipe, and further comprising,

[0007] The distillation unit is cyclically connected to the cooling unit, the distillation unit is connected to the fractionation column, and the fractionation column is cyclically connected to the cooler.

[0008] A distillation mechanism includes a distillation assembly, a sealing assembly connected to the distillation assembly, a heating assembly located within the sealing assembly, a transmission assembly, a drive assembly fixed below the distillation assembly, an adsorption plate located within the distillation assembly, and an acceleration assembly, wherein the transmission assembly is fixedly connected to the outside of the drive assembly, and the acceleration assembly is located within the distillation assembly; and a cooling mechanism including an inlet pipe, an upper inclined tube connected to the inlet pipe, a spiral tube, an outlet pipe, a cooling cylinder disposed outside the spiral tube, and a support, wherein the support is connected to the cooling cylinder, the inlet pipe is connected to the spiral tube via the upper inclined tube, and the spiral tube is connected to the outlet pipe via the lower inclined tube.

[0009] This invention only requires adjusting the position of the adsorption plate to collect o-xylene particles, thereby reducing unnecessary adsorption structures and ensuring that the device can separate o-xylene to the maximum extent, thus ensuring the processing efficiency of the device.

[0010] Preferably, the inner wall of the distillation component is fixedly connected to the sealing component, the lower part of the sealing component is fixedly connected to the driving component, the top end of the driving component passes through the transmission component and is fixedly connected to the adsorption plate, the adsorption plate is located inside the distillation component and the sealing component, the transmission component is fixedly connected to the outside of the sealing component, and the acceleration component is fixedly connected to the inside of the distillation component.

[0011] Preferably, the intake pipe is connected to the top end of the spiral tube via an upper inclined tube, the bottom end of the spiral tube is connected to one end of the exhaust pipe via a lower inclined tube, the cooling cylinder is sleeved on the outside of the spiral tube, and one side of the cooling cylinder is fixedly connected to the bracket.

[0012] The bracket is fixedly connected to the outside of the distillation assembly. The other ends of the inlet pipe and the outlet pipe are both connected to the distillation assembly. The inlet pipe is located above the acceleration assembly, and the outlet pipe is located below the acceleration assembly.

[0013] Preferably, the distillation assembly includes an outer cylinder, a pin is fixedly connected to the outer cylinder, the outer cylinder is hinged to the top cover via the pin, an isolation sleeve is fixedly connected to the lower part of the top cover, a docking valve is fixedly connected to the upper part of the top cover, the lower part of the outer cylinder is connected to the liquid outlet valve, and the lower part of the inner wall of the outer cylinder is designed with an inclination.

[0014] The outer cylinder is fixedly connected to the bracket, the inner wall of the outer cylinder is fixedly connected to the sealing assembly, the inner wall of the outer cylinder overlaps with the adsorption plate, and the outer cylinder is connected to the air inlet pipe and the air outlet pipe respectively.

[0015] Preferably, the sealing assembly includes a sealing cylinder, the sealing cylinder having a rotating groove on its outer side and an installation groove on its outer side, an isolation cover fixedly connected to the inner wall of the sealing cylinder, the isolation cover being conical, the isolation cover having a through hole at its top, and the sealing cylinder being connected to a connecting pipe;

[0016] The sealing cylinder is fixedly connected inside the outer cylinder, the connecting pipe passes through the sealing cylinder and is located outside the outer cylinder, the adsorption plate is located inside the rotating groove, the transmission assembly is fixedly connected inside the mounting groove, and the heating assembly is fixedly connected inside the sealing cylinder.

[0017] Preferably, the heating assembly includes a base, a plurality of heaters are fixedly connected to the upper part of the base, a connecting shaft is fixedly connected to the lower part of the base, the lower part of the connecting shaft passes through a first gear and is sleeved in a sleeve, a positioning frame is fixedly connected to the outside of the sleeve, and a plurality of through slots are provided on the upper part of both the base and the first gear.

[0018] The first gear meshes with the transmission assembly, the positioning frame is fixedly connected inside the sealing cylinder, and the heater is located below the isolation cover.

[0019] Preferably, the transmission assembly includes a sealing shell, a second gear is disposed inside the sealing shell, and sealing bearings are engaged at both the top and bottom of the sealing shell;

[0020] The second gear meshes with the first gear, the second gear is fixedly connected to the outside of the drive assembly, both of the sealed bearings are sleeved on the outside of the drive assembly, and the sealing shell is fixedly connected to the outside of the sealing cylinder.

[0021] Preferably, the drive assembly includes a motor, a rotating shaft is fixedly connected to the top of the motor, and the top end of the rotating shaft passes through a first bearing and is fixedly connected to a third gear;

[0022] The motor is fixedly connected to the bottom of the sealing cylinder, the second gear is fixedly connected to the outside of the rotating shaft, both of the sealing bearings are sleeved on the outside of the rotating shaft, the first bearing is snapped into the bottom of the inner wall of the outer cylinder, the third gear meshes with the acceleration component, the third gear is located in the mounting groove, and the rotating shaft is located in the mounting groove.

[0023] Preferably, the acceleration assembly includes a mounting bracket, a drive shaft is sleeved inside the mounting bracket, and the drive shaft passes through a transmission wheel and is fixedly connected to several fan blades.

[0024] The mounting bracket is fixedly connected inside the outer cylinder, and the transmission wheel meshes with the third gear.

[0025] A system for separating o-xylene from xylene includes the following separation steps:

[0026] S1. Xylene is injected into the sealing assembly, and the temperature inside the sealing assembly is maintained by the heating assembly to ensure that the internal temperature is 144.4℃, so that ortho-xylene, meta-xylene and para-xylene vaporize and float to the surface.

[0027] S2. The o-xylene is adsorbed onto the surface of the adsorption plate by the adsorption plate. As the drive component operates, it drives the adsorption plate to rotate, thereby transferring the adsorption plate containing the o-xylene to the outside of the sealing component.

[0028] S3. The internal temperature of the cooling mechanism is continuously reduced by an external cooling instrument, causing o-xylene to condense.

[0029] S4. The condensed o-xylene will be discharged, while m-xylene and para-xylene will pass through the adsorption plate and enter the fractionation tower.

[0030] Compared with the prior art, the beneficial effects of the present invention are:

[0031] 1. This invention, through the design of a driving component, an accelerating component, and a heating component, directly injects xylene into a sealing component. The heating component raises the internal temperature of the sealing component, causing the xylene to directly vaporize and decompose into o-xylene, m-xylene, and para-xylene. Due to the different particle diameters of these three compounds, as they evaporate, o-xylene particles are adsorbed onto the adsorption plate. The driving component continuously rotates the adsorption plate, moving the portion of the adsorption plate with adsorbed o-xylene particles into the distillation component. The cooling cylinder is cooled by an external cooling instrument and circulated through the accelerating component, circulation pipe, and internal air circulation of the distillation component, thereby ensuring that o-xylene can be quickly condensed and discharged from the distillation component. By directly connecting the adsorption plate to the sealing component and the distillation component, only the position of the adsorption plate needs to be adjusted accordingly to collect o-xylene particles, thereby reducing unnecessary adsorption structures, maximizing the separation of o-xylene, and improving the processing efficiency of the device.

[0032] 2. This invention also designs a heating component, a transmission component, and a drive component. When the motor is running, the motor drives the adsorption plate, the second gear, and the third gear to rotate via the rotating shaft. As the adsorption plate rotates in the rotating groove inside the sealed cylinder, the vaporized o-xylene is adsorbed onto the surface of the adsorption plate when it rises. As the adsorption plate rotates, the position of the adsorption plate with adsorbed o-xylene is transferred to the outer cylinder. Since the second gear meshes with the first gear, the first gear rotates synchronously and drives the heater to rotate through the base. When xylene enters the sealed cylinder along the connecting pipe, the heater directly increases the temperature of the xylene, making it quickly reach 144.4℃. By rotating the heater, the heating efficiency of the heater inside the sealed cylinder is improved, thereby quickly increasing the temperature inside the sealed cylinder. This ensures that the sealed cylinder can quickly reach the specified temperature during operation, thereby improving the efficiency of the device in separating o-xylene from xylene.

[0033] 3. This invention also incorporates an acceleration component and an adsorption plate. When the motor drives the third gear to rotate via the shaft, the transmission wheel rotates at high speed due to meshing with the third gear. At this time, the fan blades draw in the gas from the bottom of the sealed cylinder and discharge it upwards. The cooled gas inside the outlet pipe is quickly discharged, while a large amount of gas affected by or carrying o-xylene particles at high temperatures enters the spiral tube through the inlet pipe. By absorbing the surface temperature of the o-xylene particles, the cooling rate is increased, thereby improving the condensation effect of o-xylene and further enhancing the efficiency of the device in separating o-xylene from xylene. Attached Figure Description

[0034] Figure 1 This is a system block diagram of the present invention;

[0035] Figure 2 This is a schematic diagram of the distillation mechanism of the present invention;

[0036] Figure 3 This is a schematic diagram of the opening structure of the distillation assembly of the present invention;

[0037] Figure 4 This is a schematic cross-sectional view of the cooling mechanism of the present invention;

[0038] Figure 5 This is a schematic cross-sectional view of the distillation assembly of the present invention;

[0039] Figure 6 This is a schematic diagram of the drive component structure of the present invention;

[0040] Figure 7 This is a schematic diagram of the exploded structure of the heating component of the present invention;

[0041] Figure 8 This is a schematic diagram of the acceleration component structure of the present invention.

[0042] Explanation of the labels in the diagram:

[0043] 1. Distillation unit; 2. Cooling unit; 3. Fractionating column; 4. Cooler;

[0044] 11. Distillation assembly; 12. Sealing assembly; 13. Heating assembly; 14. Transmission assembly; 15. Drive assembly; 16. Adsorption plate; 17. Acceleration assembly;

[0045] 21. Inlet pipe; 22. Inclined pipe; 23. Spiral pipe; 24. Outlet pipe; 25. Cooling cylinder; 26. Support;

[0046] 111. Outer cylinder; 112. Pin; 113. Top cover; 114. Isolation sleeve; 115. Connecting valve; 116. Discharge valve;

[0047] 121. Sealing cylinder; 122. Rotating groove; 123. Mounting groove; 124. Isolation cover; 125. Connecting pipe;

[0048] 131. Base; 132. Heater; 133. Connecting shaft; 134. First gear; 135. Sleeve; 136. Positioning frame; 137. Through groove;

[0049] 141. Sealing housing; 142. Sealed bearing; 143. Second gear;

[0050] 151. Motor; 152. Shaft; 153. First bearing; 154. Third gear;

[0051] 171. Mounting bracket; 172. Drive shaft; 173. Transmission wheel; 174. Fan blades. Detailed Implementation

[0052] like Figures 1 to 8 As shown, the present invention relates to a system and method for separating o-xylene from xylene, comprising a cooler 4, a cooling cylinder 25, and an inlet pipe 21, and further comprising,

[0053] The distillation unit 1 is cyclically connected to the cooling unit 2, the distillation unit 1 is connected to the fractionation column 3, and the fractionation column 3 is cyclically connected to the cooler 4;

[0054] Distillation unit 1 includes a distillation assembly 11, a sealing assembly 12 connected to the distillation assembly 11, a heating assembly 13 located within the sealing assembly 12, a transmission assembly 14, a drive assembly 15 fixed below the distillation assembly 11, an adsorption plate 16 located within the distillation assembly 11, and an acceleration assembly 17. The transmission assembly 14 is fixedly connected to the outside of the drive assembly 15, and the acceleration assembly 17 is located inside the distillation assembly 11. A cooling unit 2 includes an inlet pipe 21, an upper inclined pipe 22 connected to the inlet pipe 21, a spiral pipe 23, an outlet pipe 24, a cooling cylinder 25 disposed outside the spiral pipe 23, and a support 26. The support 26 is connected to the cooling cylinder 25. The inlet pipe 21 is connected to the spiral pipe 23 via the upper inclined pipe 22, and the spiral pipe 23 is connected to the outlet pipe 24 via the lower inclined pipe 22. By designing the drive assembly 15, the acceleration assembly 17, and the heating assembly 13, xylene is directly injected... The xylene is introduced into the sealing assembly 12, and the internal temperature of the sealing assembly 12 is increased by the heating assembly 13, causing xylene to directly vaporize and decompose into o-xylene, m-xylene, and para-xylene. Since the particle diameters of the three are different, as they evaporate, the o-xylene particles are adsorbed into the adsorption plate 16. The driving assembly 15 continuously drives the adsorption plate 16 to rotate, moving the adsorption plate 16 with the adsorbed o-xylene particles into the distillation assembly 11. The cooling cylinder 25 is cooled by an external cooling instrument, and the air is circulated through the acceleration assembly 17, the circulation pipe, and the internal air of the distillation assembly 11, thereby ensuring that the o-xylene can be quickly condensed and discharged from the distillation assembly 11. By directly connecting the adsorption plate 16 to the sealing assembly 12 and the distillation assembly 11, the o-xylene particles can be collected by adjusting the position of the adsorption plate 16 accordingly, thereby reducing unnecessary adsorption structures, maximizing the separation of o-xylene, and improving the processing efficiency of the device.

[0055] In an embodiment of the present invention, the inner wall of the distillation assembly 11 is fixedly connected to the sealing assembly 12, the lower part of the sealing assembly 12 is fixedly connected to the driving assembly 15, the top end of the driving assembly 15 passes through the transmission assembly 14 and is fixedly connected to the adsorption plate 16, the adsorption plate 16 is located inside the distillation assembly 11 and the sealing assembly 12, the transmission assembly 14 is fixedly connected to the outside of the sealing assembly 12, the acceleration assembly 17 is fixedly connected to the inside of the distillation assembly 11, the inlet pipe 21 is connected to the top end of the spiral tube 23 through the upper inclined pipe 22, the bottom end of the spiral tube 23 is connected to one end of the outlet pipe 24 through the lower inclined pipe 22, the cooling cylinder 25 is sleeved on the outside of the spiral tube 23, and one side of the cooling cylinder 25 is connected to the... The support 26 is fixedly connected to the outside of the distillation assembly 11. The other ends of the inlet pipe 21 and the outlet pipe 24 are both connected to the distillation assembly 11. The inlet pipe 21 is located above the acceleration assembly 17, and the outlet pipe 24 is located below the acceleration assembly 17. Because of the inclined pipe 22, when o-xylene condenses after entering the inlet pipe 21, it will flow along the inclined design of the inclined pipe 22 into the spiral pipe 23 and the outlet pipe 24, and finally flow back into the outer cylinder 111, and then be discharged along the liquid outlet valve 116. This avoids the accumulation of o-xylene in the inlet pipe 21 and the spiral pipe 23 after condensation, and avoids the service life of the device being affected by o-xylene residue.

[0056] In an embodiment of the present invention, the distillation assembly 11 includes an outer cylinder 111, a pin 112 fixedly connected to the outer cylinder 111, the outer cylinder 111 being hinged to a top cover 113 via the pin 112, an isolation sleeve 114 fixedly connected to the lower part of the top cover 113, a docking valve 115 fixedly connected to the upper part of the top cover 113, a liquid outlet valve 116 connected to the lower part of the outer cylinder 111, an inclined design on the lower part of the inner wall of the outer cylinder 111, a fixed connection between the outer cylinder 111 and a support 26, a fixed connection between the inner wall of the outer cylinder 111 and a sealing assembly 12, and an overlap between the inner wall of the outer cylinder 111 and an adsorption plate 16. The sealing assembly 12, which is not connected to the inlet pipe 21 and outlet pipe 24, includes a sealing cylinder 121. The sealing cylinder 121 has a rotating groove 122 and an installation groove 123. An isolation cover 124, which is conical, is fixedly connected to the inner wall of the sealing cylinder 121. The top of the isolation cover 124 has a through hole. The sealing cylinder 121 is connected to a connecting pipe 125. The sealing cylinder 121 is fixedly connected inside the outer cylinder 111. The connecting pipe 125 passes through the sealing cylinder 121 and is located outside the outer cylinder 111. The adsorption plate 16 is located inside the rotating groove 122. The transmission assembly 14 is fixedly connected to the installation... Inside the groove 123, the heating assembly 13 is fixedly connected to the sealed cylinder 121. Through the design of the heating assembly 13, transmission assembly 14, and drive assembly 15, when the motor 151 runs, the motor 151 drives the adsorption plate 16, the second gear 143, and the third gear 154 to rotate via the rotating shaft 152. Since the adsorption plate 16 rotates within the rotating groove 122 inside the sealed cylinder 121, the vaporized o-xylene is adsorbed onto the surface of the adsorption plate 16 as it rises. With the rotation of the adsorption plate 16, the position of the adsorbed o-xylene on the adsorption plate 16 is transferred to the outer cylinder 111. Due to the rotation of the second gear 143... Engaging with the first gear 134, the first gear 134 rotates synchronously and drives the heater 132 to rotate through the base 131. When xylene enters the sealed cylinder 121 along the connecting pipe 125, the heater 132 directly raises the temperature of the xylene, making it quickly reach 144.4℃. By rotating the heater 132, the heating efficiency of the heater 132 in the sealed cylinder 121 is improved, thereby quickly raising the temperature in the sealed cylinder 121. This ensures that the sealed cylinder 121 can quickly reach the specified temperature during operation, thereby improving the efficiency of the device in separating o-xylene from xylene.

[0057] In another embodiment of the present invention, the heating assembly 13 includes a base 131, with a plurality of heaters 132 fixedly connected to the upper part of the base 131, and a connecting shaft 133 fixedly connected to the lower part of the base 131. The lower part of the connecting shaft 133 passes through a first gear 134 and is sleeved inside a sleeve 135. A positioning frame 136 is fixedly connected to the outside of the sleeve 135. A plurality of through slots 137 are provided above the base 131 and the first gear 134. The first gear 134 meshes with the transmission assembly 14. The positioning frame 136 is fixedly connected inside a sealing cylinder 121. The heaters 132 are located below the isolation cover 124. The transmission assembly 14 includes a sealing cylinder. The housing 141 has a second gear 143 inside. Sealing bearings 142 are snapped onto the top and bottom of the sealing housing 141. The second gear 143 meshes with the first gear 134 and is fixedly connected to the outside of the drive assembly 15. Both sealing bearings 142 are sleeved on the outside of the drive assembly 15. The sealing housing 141 is fixedly connected to the outside of the sealing cylinder 121. By providing a through groove 137 above the first gear 134 and the base 131, the problem of reduced temperature conduction efficiency caused by the obstruction of the first gear 134 and the base 131 is avoided, thereby ensuring that the temperature inside the sealing cylinder 121 is increased as a whole.

[0058] In another embodiment of the present invention, the drive assembly 15 includes a motor 151, a rotating shaft 152 fixedly connected above the motor 151, the top end of the rotating shaft 152 passing through a first bearing 153 and fixedly connected to a third gear 154, the motor 151 being fixedly connected below the sealing cylinder 121, a second gear 143 being fixedly connected outside the rotating shaft 152, two sealing bearings 142 being sleeved outside the rotating shaft 152, the first bearing 153 being snapped into the lower part of the inner wall of the outer cylinder 111, the third gear 154 meshing with the acceleration assembly 17, the third gear 154 being located in the mounting groove 123, the rotating shaft 152 being located in the mounting groove 123, and the acceleration assembly 17 including a mounting bracket 171, a drive shaft 172 being sleeved inside the mounting bracket 171, and a transmission wheel 173 and several fan blades 17 passing through the top of the drive shaft 172. 4. Fixed connection: The mounting bracket 171 is fixedly connected inside the outer cylinder 111. The transmission wheel 173 meshes with the third gear 154. Through the design of the acceleration component 17 and the adsorption plate 16, when the motor 151 drives the third gear 154 to rotate through the rotating shaft 152, the transmission wheel 173 rotates at high speed due to meshing with the third gear 154. At this time, the fan blades 174 will draw the gas inside the lower part of the sealed cylinder 121 and discharge it upwards. The cooled gas inside the outlet pipe 24 is quickly discharged, while a large amount of gas affected by the high temperature of o-xylene particles or carrying o-xylene particles will enter the spiral tube 23 through the inlet pipe 21. By absorbing the surface temperature of the o-xylene particles, the cooling rate is increased, thereby improving the condensation effect of o-xylene and further improving the efficiency of the device in separating o-xylene from xylene.

[0059] Working principle: This embodiment provides a system and method for separating o-xylene from xylene. In use, xylene is directly injected into the sealing component 12. The internal temperature of the sealing component 12 is increased by the heating component 13, causing the xylene to vaporize and decompose into o-xylene, m-xylene, and para-xylene. Since the particle diameters of the three are different, as they evaporate, the o-xylene particles are adsorbed into the adsorption plate 16. The driving component 15 continuously drives the adsorption plate 16 to rotate, moving the adsorption plate 16 with the adsorbed o-xylene particles into the distillation component 11. The cooling cylinder 25 is cooled by an external cooling instrument and circulated through the acceleration component 17, the circulation pipe, and the internal air circulation of the distillation component 11, so that the o-xylene can be quickly condensed and discharged from the distillation component 11.

[0060] When the motor 151 is running, the motor 151 drives the adsorption plate 16, the second gear 143 and the third gear 154 to rotate through the rotating shaft 152. Since the adsorption plate 16 rotates in the rotating groove 122 in the sealed cylinder 121, the vaporized o-xylene will be adsorbed on the surface of the adsorption plate 16 when it rises. As the adsorption plate 16 rotates, the position of the adsorption plate 16 with adsorbed o-xylene is transferred to the outer cylinder 111. Since the second gear 143 meshes with the first gear 134, the first gear 134 rotates synchronously and drives the heater 132 to rotate through the base 131. When the xylene enters the sealed cylinder 121 along the connecting pipe 125, the heater 132 will raise the temperature of the xylene to 144.4℃.

[0061] When the motor 151 drives the third gear 154 to rotate through the shaft 152, the transmission wheel 173 rotates at high speed due to meshing with the third gear 154. At this time, the fan blades 174 draw in the gas below the sealed cylinder 121 and discharge it upwards. The gas cooled inside the exhaust pipe 24 is quickly discharged, and a large amount of gas affected by or carried by the high temperature of the o-xylene particles enters the spiral tube 23 through the intake pipe 21.

[0062] The embodiments disclosed in this invention are preferred embodiments, but are not limited thereto. Those skilled in the art can easily understand the spirit of this invention based on the above embodiments and make different extensions and variations, but as long as they do not depart from the spirit of this invention, they are all within the protection scope of this invention.

Claims

1. A system for separating ortho-xylene in xylene, comprising a cooler (4), a cooling cylinder (25), and a gas inlet pipe (21), characterized in that, Also include, The rectification mechanism (1) and cooling mechanism (2) are connected in circulation, the rectification mechanism (1) is connected with the fractionating column (3), and the fractionating column (3) is connected with the cooler (4) in circulation. The inner wall of the rectification assembly (11) is fixedly connected with the sealing assembly (12), the lower portion of the sealing assembly (12) is fixedly connected with the driving assembly (15), the top end of the driving assembly (15) is fixedly connected with the adsorption plate (16) through the transmission assembly (14), the adsorption plate (16) is located in the rectification assembly (11) and the sealing assembly (12), the transmission assembly (14) is fixedly connected outside the sealing assembly (12), and the acceleration assembly (17) is fixedly connected in the rectification assembly (11). The top end of the spiral pipe (23) is communicated with one end of the gas inlet pipe (21) through the upper inclined pipe (22), the bottom end of the spiral pipe (23) is communicated with the other end of the gas outlet pipe (24) through the lower inclined pipe (22), the cooling cylinder (25) is sleeved outside the spiral pipe (23), and one side of the cooling cylinder (25) is fixedly connected with the support (26).

2. The system for separating o-xylene in xylene according to claim 1, characterized by, The support (26) is fixedly connected outside the rectification assembly (11), the other end of the gas inlet pipe (21) and the gas outlet pipe (24) are communicated with the rectification assembly (11), the gas inlet pipe (21) is located above the acceleration assembly (17), and the gas outlet pipe (24) is located below the acceleration assembly (17).

3. The system for separating o-xylene in xylene according to claim 2, characterized by, The rectification assembly (11) comprises an outer cylinder (111), the outer cylinder (111) is fixedly connected with a pin shaft (112) outside, the outer cylinder (111) is hinged with a top cover (113) through the pin shaft (112), the lower portion of the top cover (113) is fixedly connected with an isolation sleeve (114), the upper portion of the top cover (113) is fixedly connected with a butt joint valve (115), the lower portion of the outer cylinder (111) is communicated with a liquid outlet valve (116), and the lower portion of the inner wall of the outer cylinder (111) is designed to be inclined. ​ 4. The system for separating o-xylene in xylene according to claim 3, characterized by, ​ The outer cylinder (111) is fixedly connected with the support (26), the inner wall of the outer cylinder (111) is fixedly connected with the sealing assembly (12), the inner wall of the outer cylinder (111) is overlapped with the adsorption plate (16), and the outer cylinder (111) is connected with the air inlet pipe (21) and the air outlet pipe (24) in communication.

5. The system for separating o-xylene in xylene according to claim 4, characterized by, The sealing assembly (12) comprises a sealing cylinder (121), a rotating groove (122) is formed on the outer side of the sealing cylinder (121), an installation groove (123) is formed on the outer side of the sealing cylinder (121), the inner wall of the sealing cylinder (121) is fixedly connected with an isolation cover (124), the isolation cover (124) is conical, a through hole is formed on the top of the isolation cover (124), and the sealing cylinder (121) is connected with a connecting pipe (125) in communication. The sealing cylinder (121) is fixedly connected in the outer cylinder (111), the connecting pipe (125) passes through the sealing cylinder (121) and is located outside the outer cylinder (111), the adsorption plate (16) is located in the rotating groove (122), the transmission assembly (14) is fixedly connected in the installation groove (123), and the heating assembly (13) is fixedly connected in the sealing cylinder (121).

6. The system for separating o-xylene in xylene according to claim 5, characterized by, The heating assembly (13) comprises a base (131), a plurality of heaters (132) are fixedly connected above the base (131), a connecting shaft (133) is fixedly connected below the base (131), the connecting shaft (133) passes through a first gear (134) and is sleeved in a sleeve (135) below, a positioning frame (136) is fixedly connected outside the sleeve (135), and a plurality of through grooves (137) are formed above the base (131) and the first gear (134). The first gear (134) is engaged with the transmission assembly (14), the positioning frame (136) is fixedly connected in the sealing cylinder (121), and the heater (132) is located below the isolation cover (124).

7. The system for separating o-xylene in xylene according to claim 6, characterized by, The transmission assembly (14) comprises a sealing shell (141), a second gear (143) is arranged in the sealing shell (141), and sealing bearings (142) are clamped above and below the sealing shell (141). The second gear (143) is engaged with the first gear (134), the second gear (143) is fixedly connected outside the driving assembly (15), the two sealing bearings (142) are sleeved outside the driving assembly (15), and the sealing shell (141) is fixedly connected outside the sealing cylinder (121).

8. The system for separating o-xylene in xylene according to claim 7, characterized by, The driving assembly (15) comprises a motor (151), a rotating shaft (152) is fixedly connected above the motor (151), and the top end of the rotating shaft (152) is fixedly connected with a third gear (154) through a first bearing (153). The motor (151) is fixedly connected below the sealing cylinder (121), the second gear (143) is fixedly connected outside the rotating shaft (152), the two sealing bearings (142) are sleeved outside the rotating shaft (152), the first bearing (153) is clamped below the inner wall of the outer cylinder (111), the third gear (154) is engaged with the acceleration assembly (17), the third gear (154) is located in the mounting groove (123), and the rotating shaft (152) is located in the mounting groove (123).

9. The system for separating o-xylene in xylene according to claim 8, characterized in that, The acceleration assembly (17) comprises a mounting frame (171), the mounting frame (171) is sleeved with a driving shaft (172), and the driving shaft (172) is fixedly connected with a plurality of fan blades (174) through a transmission wheel (173). The mounting frame (171) is fixedly connected in the outer cylinder (111), and the transmission wheel (173) is engaged with the third gear (154).

10. A method for separating ortho-xylene in xylene, the system for separating ortho-xylene in xylene according to claim 9, characterized by, The method comprises the following separation steps: S1, xylene is injected into the sealing assembly (12), the temperature in the sealing assembly (12) is kept through the heating assembly (13), the internal temperature is ensured to be 144.4℃, the o-xylene, m-xylene and p-xylene are vaporized and floated upwards; S2, the o-xylene is adsorbed on the surface of the adsorption plate (16) through the adsorption plate (16), the adsorption plate (16) is driven to rotate through the driving assembly (15), and the adsorption plate (16) adsorbed with part of the o-xylene is transferred out of the sealing assembly (12); S3, the internal temperature of the cooling mechanism (2) is continuously reduced through an external cooling instrument, so that the o-xylene is condensed; S4, the condensed o-xylene is discharged, and the m-xylene and p-xylene pass through the adsorption plate (16) and enter the fractionating column (3).

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