Polyolefin elastomer polymer volatile component removal device and removal method

Abstract

The invention provides a polyolefin elastomer polymer volatile component removal device and removal method, and relates to the technical field of polyolefin elastomer polymer devolatilization. The polyolefin elastomer polymer volatile component removal device comprises a shell assembly, the shell assembly is provided with a flash evaporation cavity and a first heating assembly arranged outside the flash evaporation cavity, and the flash evaporation cavity is provided with a raw material liquid inlet, a treatment liquid outlet and a gas phase pipe which are communicated with the outside; the second heating assembly is arranged in the flash evaporation cavity, and the second heating assembly is used for heating the polyolefin elastomer polymer in the flash evaporation cavity; the stirring assembly is arranged in the flash evaporation cavity, and the stirring assembly is used for stirring the polyolefin elastomer polymer in the flash evaporation cavity. According to the scheme, in the devolatilization process, the temperature distribution of the polymer in the flash evaporation cavity can be more uniform, local temperature runaway caused by low heat transfer coefficient of the polymer and coking caused by viscosity increase and tank blockage are prevented, and the device is easy to operate and has good economical efficiency and stability.

Description

Technical Field

[0001] The invention relates to the technical field of devolatilization of polyolefin elastomer polymers, and in particular to a device and a method for removing volatile components of polyolefin elastomer polymers. Background Art

[0002] Polyolefin elastomer polymer (POE) has important applications in the automotive, home appliance and photovoltaic fields. Currently, POE production mostly adopts solution polymerization process. After the reaction is terminated, the polymer usually contains unreacted raw materials and one of α-butene, α-hexene and α-octene. In addition, it also contains solvent components, usually C6-C12 alkanes. These low molecular weight components contained in POE are collectively referred to as volatiles, and the presence of volatiles will have a great negative impact on the application of polymers.

[0003] After the solution polymerization process, the content of low molecular weight volatile components in the POE solution is about 90%. Usually, a three-stage devolatilization process is required to remove the volatile component content from 90% to about 200ppm. The first two stages of devolatilization devices remove the volatile components to about 10% to 30%. The third stage of devolatilization usually selects scraper film devolatilizers, twin-screw extruders and other equipment to remove volatile components from 10% to 30% to about 200ppm.

[0004] The difficulty of the POE devolatilization process lies in strengthening the mass transfer and heat transfer process of the high viscosity system, which requires the use of special separation equipment. In the existing technology, the energy consumption of the POE devolatilization process accounts for about 70% of the entire polymerization process. The devolatilization process consumes a lot of energy, the devolatilization structure is complex and the devolatilization efficiency is low.

[0005] Currently, no effective solution has been proposed for the above-mentioned technical problems. Summary of the invention

[0006] The main purpose of the present invention is to provide a device and method for removing volatile components of polyolefin elastomer polymers, so as to solve the problems of large energy consumption, complex devolatilization structure and low devolatilization efficiency in the first two stages of devolatilization process in the prior art.

[0007] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, there is provided a device for removing volatile components of a polyolefin elastomer polymer, comprising: a shell component, the shell component having a flash chamber and a first heating component arranged outside the flash chamber, the first heating component being used to heat the flash chamber, the flash chamber having a raw liquid inlet, a treatment liquid outlet and a gas phase pipe connected to the outside, the gas phase pipe being used to remove volatile components of the polyolefin elastomer polymer; a second heating component, the second heating component being arranged in the flash chamber, the second heating component being used to heat the polyolefin elastomer polymer in the flash chamber; and a stirring component, the stirring component being arranged in the flash chamber, the stirring component being used to stir the polyolefin elastomer polymer in the flash chamber.

[0008] Furthermore, the first heating assembly includes a heating jacket disposed on the outer wall of the flash chamber, and the heating jacket has a heating space for circulating the first heating medium.

[0009] Furthermore, the shell assembly includes: an inner shell having a flash chamber, a heating jacket disposed on an outer surface of the inner shell, and at least a portion of the heating jacket shares a portion of the side wall with the inner shell.

[0010] Furthermore, the second heating component includes a heating coil, a second heating medium is arranged in the heating coil, and the heating coil is spirally wound.

[0011] Furthermore, the stirring assembly includes a stirring connecting rod and a plurality of stirring members connected to the stirring connecting rod. The stirring connecting rod is arranged in the flash chamber along the height direction of the flash chamber. The stirring connecting rod rotates to drive the stirring members to rotate synchronously, thereby stirring the polyolefin elastomer polymer in the flash chamber.

[0012] Further, the plurality of stirring members include a U-shaped stirring member, wherein one end of the stirring connecting rod extends into an opening of the U-shaped stirring member and is connected to the bottom of the U-shaped stirring member.

[0013] Furthermore, the plurality of stirring elements further include a spiral stirring element, and the spiral stirring element is spirally wound on the stirring connecting rod along the circumference of the stirring connecting rod.

[0014] Furthermore, the second heating assembly includes a heating coil, in which a second heating medium is arranged, and the heating coil is arranged in a circumferential spiral along the stirring connecting rod.

[0015] Furthermore, the first heating medium is heating steam, and / or the second heating medium is heat transfer oil.

[0016] According to another aspect of the present invention, a method for removing volatile components from a polyolefin elastomer polymer is provided. The method is performed using the above-mentioned polyolefin elastomer polymer volatile component removal device. The method comprises the following steps: adjusting the pressure in the flash chamber to a first preset pressure value P1, wherein 3kPa≤P1≤10MPa; introducing heating steam into the heating space, wherein the pressure of the heating steam is a second preset pressure value P2, wherein 0.4MPa≤P2≤5.5MPa; introducing heat transfer oil into the heating coil, wherein the temperature of the heat transfer oil is a first preset temperature T1, wherein 100°C≤ T1≤300℃; control the stirring component to stir at a preset stirring speed, the preset stirring speed is greater than or equal to 20r / min, and less than or equal to 400r / min; introduce the raw material liquid into the flash chamber, the feed temperature T2 of the raw material liquid is 100℃~200℃, the feed pressure P2 of the raw material liquid is 0.1MPa~10MPa, and the feed speed of the raw material liquid is 5kg / h~1000kg / h; after the raw material liquid stays in the flash chamber for a preset time t, the volatile components of the raw material liquid are released from the gas phase pipe, wherein 5min≤t≤120min.

[0017] By applying the technical solution of the present invention, a flash chamber is formed in a shell component, and a flash process is used to devolatilize low molecular weight volatile components in a POE polymer. A first heating element is arranged on the shell component to heat the entire flash chamber, and a second heating element is evenly arranged in the flash chamber to make the temperature distribution of the high viscosity polymer in the flash chamber more uniform. A stirring component is also arranged in the flash chamber. The stirring component stirs the high viscosity polymer in the flash chamber, which can prevent the high viscosity polymer from generating local temperature runaway due to a low heat transfer coefficient, and can also increase the turbulence of the high viscosity polymer and avoid coking due to increased viscosity during the devolatilization process of the high viscosity polymer, which leads to tank blockage. The device is simple to operate and has good economy and stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0019] Figure 1 A schematic structural diagram of an embodiment of a device for removing volatile components from a polymer according to the present invention is shown.

[0020] The above drawings include the following reference numerals:

[0021] 10. Shell assembly; 100. Flash chamber; 11. Inner shell; 12. Heating jacket; 120. Heating space; 121. Fixed ear seat; 13. Driving motor; 14. Raw liquid inlet; 15. Processing liquid outlet; 16. Gas phase pipe; 17. Refrigerant outlet; 18. Heat medium inlet;

[0022] 21. Heating coil; 211. Coil inlet; 212. Coil outlet;

[0023] 30. Stirring assembly; 31. U-shaped stirring element; 32. Spiral stirring element. DETAILED DESCRIPTION

[0024] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0025] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0026] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the terms used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein, for example. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, device, product or equipment that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or equipment.

[0027] Now, exemplary embodiments according to the present application will be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments may be implemented in a variety of different forms and should not be construed as being limited to the embodiments described herein. It should be understood that these embodiments are provided to make the disclosure of the present application thorough and complete, and to fully convey the concepts of these exemplary embodiments to those of ordinary skill in the art. In the accompanying drawings, for the sake of clarity, the thickness of the layers and regions may be enlarged, and the same reference numerals are used to represent the same devices, and thus their descriptions will be omitted.

[0028] Combination Figure 1 As shown, according to a specific embodiment of the present application, a device for removing volatile components of a polyolefin elastomer polymer is provided.

[0029] Specifically, the device for removing volatile components of a polyolefin elastomer polymer includes a shell assembly 10, the shell assembly 10 has a flash chamber 100 and a first heating assembly arranged outside the flash chamber 100, the first heating assembly is used to heat the flash chamber 100, the flash chamber 100 has a raw liquid inlet 14 connected to the outside, a treatment liquid outlet 15 and a gas phase pipe 16, the gas phase pipe 16 is used to remove volatile components of the polyolefin elastomer polymer; a second heating assembly, the second heating assembly is arranged in the flash chamber 100, the second heating assembly is used to heat the polyolefin elastomer polymer in the flash chamber 100; a stirring assembly 30, the stirring assembly 30 is arranged in the flash chamber 100, and the stirring assembly 30 is used to stir the polyolefin elastomer polymer in the flash chamber 100.

[0030] By applying the technical solution of this embodiment, a flash chamber 100 is formed in the shell component 10, and a flash process is used to devolatilize low molecular weight volatile components in the POE polymer. A first heating element is arranged on the shell component 10 to heat the flash chamber 100 as a whole, and a second heating element is evenly arranged in the flash chamber 100 to make the temperature distribution of the high viscosity polymer in the flash chamber 100 more uniform. A stirring component 30 is also arranged in the flash chamber 100. The stirring component 30 stirs the high viscosity polymer in the flash chamber 100 to prevent the high viscosity polymer from generating local temperature runaway due to low heat transfer coefficient, and also to increase the turbulence of the high viscosity polymer and avoid coking due to increased viscosity during the devolatilization process of the high viscosity polymer, which leads to tank blockage. The device is simple to operate and has good economy and stability.

[0031] It should be noted that the volatile components of the polyolefin elastomer polymer are the low molecular weight olefins remaining in the solution after the polymerization reaction of the polymer and the low molecular weight alkane components in the solvent. The polyolefin elastomer polymer (Polyolefin Elastomer), namely POE, is usually made by copolymerization of ethylene and α-olefin. Therefore, the solution contains unreacted ethylene and one of α-butene, α-hexene, and α-octene, and the solvent is a C6-C12 alkane. The solvent and the raw materials are both low molecular weight olefins or alkane materials. Compared with POE, its low boiling point, low density, and volatile physical properties will have a negative impact on the application of POE, so it can be removed according to its volatile physical properties.

[0032] Those skilled in the art should understand that the thermal conductivity of polyolefin elastomer polymer is relatively low. In this embodiment, a first heating element is used to heat the outer wall of the shell component 10, and a second heating element is used to heat the POE polymer in the flash chamber 100 of the shell component 10. When the flash evaporation operation is performed, the first heating element and the second heating element work simultaneously to heat the POE polymer from the inside and outside of the shell component 10, which can improve the heating efficiency of the POE polymer, and avoid using a heating method that causes different heating rates inside and outside the POE polymer and uneven temperature distribution, and also avoids local temperature runaway of the high-viscosity POE polymer due to low thermal conductivity.

[0033] In another embodiment of the present application, Figure 1 As shown, the shell assembly 10 is arranged vertically during operation. Along the vertical direction of the shell assembly 10, the raw liquid inlet 14 is arranged at the bottom of the shell assembly 10, the treated liquid outlet 15 is arranged on the side wall of the shell assembly 10, and the gas phase pipe 16 is arranged at the top of the shell assembly 10. Compared with the traditional flash evaporation equipment, this embodiment adopts the bottom feeding and top discharging method, and with the help of the natural convection effect of the fluid, the concentration and temperature distribution uniformity of the high viscosity polymer in the flash evaporation chamber 100 can be further improved.

[0034] Specifically, the first heating assembly includes a heating jacket 12 disposed on the outer wall of the flash chamber 100, and the heating jacket 12 has a heating space 120 for circulating the first heating medium. Figure 1 As shown, the heating jacket 12 is arranged on the outer wall of the flash chamber 100 in a jacketed manner. The heating jacket 12 covers the height of the shell component 10 reached by the POE polymer liquid level in the flash chamber 100. The treatment liquid outlet 15 is arranged on the side wall of the shell component 10 not covered by the heating jacket 12, and the bottom of the shell component 10 covered by the heating jacket 12 is provided with a recessed portion for the raw material liquid inlet 14 to pass through. The POE polymer raw material liquid enters the flash chamber 100 through the raw material liquid inlet 14. The recessed portion is provided on the heating jacket 12 to facilitate the filling of the POE polymer raw material liquid into the flash chamber 100. The heating jacket 12 forms a heating space 120 on the outer wall of the flash chamber 100. The heating space 120 is in uniform contact with the outer wall of the flash chamber 100 so that the first heating medium is introduced into the heating space 120 to achieve uniform heating of the flash chamber 100.

[0035] In one embodiment of the present application, Figure 1 As shown, the heating jacket 12 is provided with a plurality of refrigerant outlets 17 near the recessed portion, and the heating jacket 12 is provided with a heat medium inlet 18 away from the recessed portion, that is, along the height direction of the shell assembly 10, the first heating medium is introduced into the heating space 120 from the heat medium inlet 18, and the first heating medium heats the flash chamber 100, and the first heating medium after releasing heat is discharged from the heating space 120 from the refrigerant outlet 17.

[0036] In another embodiment of the present application, Figure 1 As shown, the heating jacket 12 is further provided with two fixing ears 121, which are arranged along the circumference of the heating jacket 12, and are used to fix the shell assembly 10 so that the flash chamber 100 remains in a vertical state during operation.

[0037] Further, the housing assembly 10 includes an inner housing 11, the inner housing 11 has a flash chamber 100, a heating jacket 12 is arranged on the outer surface of the inner housing 11, and at least part of the heating jacket 12 shares part of the side wall with the inner housing 11. The heating jacket 12 and the inner housing 11 are integrally formed, and the heating jacket 12 and the inner housing 11 share the side wall of the inner housing 11 surface covered by the heating jacket 12, so that the heating space 120 heats the side wall of the inner housing 11 and directly transfers the heat to the POE polymer in the flash chamber 100 through the side wall. Such a setting can improve the heating efficiency of the flash chamber 100 by the heating jacket 12, and at the same time, the structural setting is simple, material is saved, and the stability and reliability of the housing assembly 10 are improved.

[0038] Furthermore, the second heating assembly includes a heating coil 21, in which a second heating medium is disposed, and the heating coil 21 is spirally wound. Figure 1 As shown, along the height direction of the shell component 10, the heating coil 21 is directly thermoformed into a spiral shape and arranged in the flash chamber 100. The heating coil 21 has a coil inlet 211 and a coil outlet 212. The coil inlet 211 and the coil outlet 212 are arranged on the side wall of the shell component 10 not covered by the heating jacket 12. The second heating medium is introduced from the coil inlet 211 and flows out from the coil outlet 212. The second heating medium is used to heat the POE polymer in the flash chamber 100.

[0039] Further, the stirring assembly 30 includes a stirring connecting rod and a plurality of stirring members connected to the stirring connecting rod. The stirring connecting rod is arranged in the flash chamber 100 along the height direction of the flash chamber 100. The stirring connecting rod rotates, which can drive the stirring members to rotate synchronously, thereby stirring the polyolefin elastomer polymer in the flash chamber 100. It should be noted that the stirring assembly 30 also includes a driving motor 13. The stirring connecting rod is connected to the output shaft of the driving motor 13. The output shaft of the driving motor 13 can drive the stirring connecting rod to rotate, thereby driving the plurality of stirring members to rotate, thereby stirring the POE polymer in the flash chamber 100.

[0040] Specifically, the plurality of stirring members include a U-shaped stirring member 31, wherein one end of the stirring connecting rod extends into the opening of the U-shaped stirring member 31 and is connected to the bottom of the U-shaped stirring member 31. The U-shaped stirring member 31 performs scraper-type stirring on the inner wall of the flash chamber 100 through the U-shaped stirring arm, and the opening degree of the U-shaped stirring member 31 is equivalent to the diameter of the horizontal cross section of the flash chamber 100, that is, only a gap is left between the U-shaped stirring arm of the U-shaped stirring member 31 and the inner wall of the flash chamber 100. When the U-shaped stirring member 31 is working, the U-shaped stirring arm performs scraper-type stirring on the inner wall of the flash chamber 100, which can increase the shear force between the high-viscosity polymer and the inner wall of the flash chamber 100, and prevent the high-viscosity polymer from coking due to the increase in viscosity when removing volatile organic components, thereby preventing the coking from growing along the inner wall of the flash chamber 100 to the treated liquid outlet 15 and causing tank blockage.

[0041] Furthermore, the plurality of stirring members also include a spiral stirring member 32, and the spiral stirring member 32 is spirally wound on the stirring connecting rod along the circumference of the stirring connecting rod. The two ends of the spiral stirring member 32 are arranged at a distance along the axial direction of the stirring connecting rod, so that the spiral stirring member 32 extends along the axial direction of the stirring connecting rod, and is arranged to be spirally wound along the circumference of the stirring connecting rod. The spiral stirring member 32 is arranged in the flash chamber 100. When the spiral stirring member 32 is working, due to its spiral belt shape rotating around the stirring connecting rod, the turbulence of the high-viscosity polymer can be increased at a low speed, and the temperature transfer rate can be increased. The fluidity of the high-viscosity polymer with a low heat transfer coefficient in the flash chamber 100 is enhanced, and the temperature distribution of the high-viscosity polymer is made more uniform.

[0042] In this embodiment, the plurality of stirring members include a U-shaped stirring member 31 and a spiral stirring member 32 which are arranged together in the flash chamber 100. When the flash devolatilization process is performed, the U-shaped stirring member 31 and the spiral stirring member 32 are simultaneously driven by the driving motor 13 to rotate and stir the high-viscosity POE polymer in the flash chamber 100, so that the fluidity of the high-viscosity polymer with a low heat transfer coefficient in the flash chamber 100 is enhanced, thereby making the temperature distribution of the high-viscosity polymer more uniform, and at the same time, it can also prevent the local high-viscosity polymer from overheating and uneven temperature distribution, resulting in coking and tank blockage.

[0043] Furthermore, the second heating assembly includes a heating coil 21, in which a second heating medium is arranged, and the heating coil 21 is arranged in a spiral along the circumference of the stirring connecting rod. Figure 1As shown, the heating coil 21 and the spiral stirring member 32 are both arranged to be spirally wound along the circumference of the stirring connecting rod, and the radial distance from the heating coil 21 to the stirring connecting rod is greater than the radial distance from the spiral stirring member 32 to the stirring connecting rod, and the radial distance from the U-shaped stirring member 31 to the stirring connecting rod is greater than the radial distance from the heating coil 21 to the stirring connecting rod. In this way, when the heating coil 21 is introduced into the second heating medium to heat the high-viscosity POE polymer in the flash chamber 100, for the heat generated by the heating coil 21, the internal heat is evenly dispersed by the spiral stirring member 32, and the external heat is evenly dispersed by the U-shaped stirring member 31.

[0044] Optionally, the first heating medium is heating steam, and / or the second heating medium is heat transfer oil. The first heating medium and the second heating medium can also be selected and replaced according to practical conditions, or other heating media with good physical properties can be used to heat the heating coil 21 and the flash chamber 100.

[0045] The use of the polyolefin elastomer polymer volatile component removal device in the above embodiment to remove volatile components has the following beneficial effects:

[0046] 1) The heating jacket 12 and the heating coil 21 are used simultaneously to make the temperature distribution of the high-viscosity POE polymer in the flash chamber 100 more uniform, thereby preventing the low heat transfer coefficient caused by the excessively high viscosity of POE from causing local temperature runaway and coking.

[0047] 2) A U-shaped stirring element 31 is provided outside the heating coil 21 near the inner wall of the flash chamber 100 to increase the shear force between the high-viscosity POE polymer and the wall of the flash chamber 100, thereby preventing the high-viscosity POE polymer from coking due to increased viscosity when removing the organic solvent, thereby avoiding tank blockage due to excessive coking.

[0048] 3) By adopting the method of feeding at the bottom of the flash chamber 100 and discharging at the top, the concentration and temperature distribution uniformity of the high-viscosity POE polymer in the flash chamber 100 can be improved by means of natural convection effect.

[0049] According to another specific embodiment of the present application, a method for removing volatile components from a polyolefin elastomer polymer is also provided. The method is performed using the polyolefin elastomer polymer volatile component removal device in the above embodiment. The method comprises the following steps: adjusting the pressure in the flash chamber 100 to a first preset pressure value P1, wherein 3kPa≤P1≤10MPa; introducing heating steam into the heating space 120, wherein the pressure of the heating steam is a second preset pressure value P2, wherein 0.4MPa≤P2≤5.5MPa; introducing heat transfer oil into the heating coil 21, wherein the temperature of the heat transfer oil is a first preset temperature T1, wherein 1 00℃≤T1≤300℃; control the stirring assembly 30 to stir at a preset stirring speed, the preset stirring speed is greater than or equal to 20r / min and less than or equal to 400r / min; introduce the raw material liquid into the flash chamber 100, the feed temperature T2 of the raw material liquid is 100℃~200℃, the feed pressure P2 of the raw material liquid is 0.1MPa~10MPa, and the feed speed of the raw material liquid is 5kg / h~1000kg / h; after the raw material liquid stays in the flash chamber 100 for a preset time t, the volatile components of the raw material liquid are released from the gas phase pipe 16, wherein 5min≤t≤120min.

[0050] It should be noted that the preset time t for the raw material liquid to stay in the flash chamber 100 can be controlled by the feed rate of the raw material liquid. According to the feeding method of the lower inlet of the raw material liquid in this embodiment, the residence time of the raw material liquid in the flash chamber 100 can be increased, and the residence time of the raw material liquid in the flash chamber 100 can be further controlled by controlling the feed rate of the raw material liquid. The preferred residence time of the raw material liquid in the flash chamber 100 is obtained according to the experiment to achieve a better devolatilization effect.

[0051] Preferably, 5kPa≤P1≤3MPa; 1.0MPa≤P2≤5.5MPa; the preset stirring speed is greater than or equal to 50r / min, and less than or equal to 200r / min; 140℃≤T2≤180℃; 0.3MPa≤P2≤8MPa; 20min≤t≤60min.

[0052] After the devolatilization process is carried out by the method for removing volatile components of the polyolefin elastomer polymer in the above embodiment, the content of the volatile components after devolatilization is 1% to 20%, preferably, the content is 2% to 10%.

[0053] The remaining content of the volatile components after the volatile components are removed by the method for removing the volatile components of the polyolefin elastomer polymer in the embodiment is described by the following examples and comparative examples:

[0054] Example 1

[0055] The volume of the flash tank is 30L, and the feed is fed from the raw liquid inlet 14 at a feed rate of 20kg / h, a feed temperature of 140°C, a feed pressure of 0.2MPa, a feed composition of 80wt% volatile component content, the temperature of the heat transfer oil in the heating coil 21 is 230°C, and a high-pressure steam with a pressure of 1.0MPa is introduced into the heating space 120. The stirring speed of the spiral stirring element 32 and the U-shaped stirring element 31 is 100r / min. The generated volatile component vapor is discharged from the gas phase pipe 16. As the liquid level of the pumped liquid increases, the devolatilized liquid is discharged from the treated liquid outlet 15. The residence time is controlled by adjusting the feed rate. Under this condition, the residence time of the material is 60min, and the content of volatile components in POE is 8%.

[0056] Example 2

[0057] On the basis of Example 1, the pressure of the heat transfer oil and the high-pressure steam was increased to examine the devolatilization effect. The volume of the flash tank was 30L, the feed was fed from the raw liquid inlet 14, the feed rate was 20kg / h, the feed temperature was 140°C, the feed pressure was 0.2MPa, the feed composition was 80wt% of the volatile component content, the temperature of the heat transfer oil in the heating coil 21 was 250°C, the high-pressure steam with a pressure of 5.4MPa was introduced into the heating space 120, the stirring speed of the spiral stirring element 32 and the U-shaped stirring element 31 was 100r / min, the generated volatile component steam was discharged from the gas phase pipe 16, and the devolatilized feed liquid was discharged from the treated liquid outlet 15. Under these conditions, the residence time of the material was 60min, and the volatile component content in POE was 2%.

[0058] Example 3

[0059] On the basis of Example 2, the residence time was reduced to investigate the devolatilization effect. The volume of the flash tank was 30L, the feed was fed from the raw liquid inlet 14, the feed rate was 40kg / h, the feed temperature was 140°C, the feed pressure was 0.2MPa, the feed composition was 80wt% of the volatile component content, the temperature of the heat transfer oil in the heating coil 21 was 250°C, the high-pressure steam with a pressure of 5.4MPa was introduced into the heating space 120, the stirring speed of the spiral stirring element 32 and the U-shaped stirring element 31 was 100r / min, the generated volatile component steam was discharged from the gas phase pipe 16, and the devolatilized feed liquid was discharged from the treated liquid outlet 15. Under these conditions, the residence time of the material was 30min, and the volatile component content in POE was 5%.

[0060] Comparative Example 1

[0061] On the basis of Example 2, the heating coil 21 is no longer fed with heat transfer oil, and the heat source for devolatilization is entirely supplied by the heating jacket 12. A 30L flash tank is still used, and feed is fed from the raw liquid inlet 14, the feed rate is 20kg / h, the feed temperature is 140°C, the feed pressure is 0.2MPa, and the feed composition is 80wt% of the volatile component content. High-pressure steam with a pressure of 5.4MPa is fed into the heating space 120, and the stirring speed of the spiral stirring element 32 and the U-shaped stirring element 31 is 100r / min. The generated volatile component steam is discharged from the gas phase pipe 16, and the devolatilized feed liquid is discharged from the treated liquid outlet 15. Under this condition, the residence time of the material is 60min, and the volatile component content in POE is 15%.

[0062] Comparative Example 2

[0063] On the basis of Example 2, the stirring method only uses the spiral stirring element 32, and the U-shaped stirring element 31 is removed. A 30L flash tank is still used, and the feed is fed from the raw liquid inlet 14, the feed rate is 20kg / h, the feed temperature is 140°C, the feed pressure is 0.2MPa, the feed composition is 80wt% of the volatile component content, the temperature of the heat transfer oil in the heating coil 21 is 250°C, and the high-pressure steam with a pressure of 5.4MPa is passed into the heating space 120. The stirring speed of the spiral stirring element 32 is 200r / min, and the generated volatile component steam is discharged from the gas phase pipe 16, and the devolatilized feed liquid is discharged from the treated liquid outlet 15. Under this condition, the residence time of the material is 60min, and the volatile component content in POE is 4.7%. However, after three repeated experiments, the tank is blocked.

[0064] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0065] In addition to the above, it should be noted that "one embodiment", "another embodiment", "embodiment", etc. mentioned in this specification refer to the specific features, structures or characteristics described in conjunction with the embodiment included in at least one embodiment generally described in this application. The same expression appearing in multiple places in the specification does not necessarily refer to the same embodiment. Further, when describing a specific feature, structure or characteristic in conjunction with any embodiment, it is claimed that the realization of such feature, structure or characteristic in conjunction with other embodiments also falls within the scope of the present invention.

[0066] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0067] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A device for removing volatile components of polyolefin elastomer polymer, characterized in that: include: A shell component (10), the shell component (10) comprising a flash chamber (100) and a first heating component arranged outside the flash chamber (100), the first heating component being used to heat the flash chamber (100), the flash chamber (100) comprising a raw liquid inlet (14) communicating with the outside, a treated liquid outlet (15) and a gas phase pipe (16), the gas phase pipe (16) being used to remove volatile components of a polyolefin elastomer polymer; a second heating component, the second heating component being disposed in the flash chamber (100), the second heating component being used to heat the polyolefin elastomer polymer in the flash chamber (100); A stirring component (30), wherein the stirring component (30) is disposed in the flash chamber (100), and the stirring component (30) is used to stir the polyolefin elastomer polymer in the flash chamber (100).

2. The device for removing volatile components from polyolefin elastomer polymer according to claim 1, characterized in that: The first heating component comprises a heating jacket (12) arranged on the outer wall of the flash chamber (100), and the heating jacket (12) has a heating space (120) for circulating a first heating medium.

3. The device for removing volatile components of polyolefin elastomer polymer according to claim 2, characterized in that: The housing assembly (10) comprises: An inner shell (11), wherein the inner shell (11) has the flash chamber (100), the heating jacket (12) is arranged on the outer surface of the inner shell (11), and at least a portion of the heating jacket (12) shares a portion of the side wall with the inner shell (11).

4. The device for removing volatile components from polyolefin elastomer polymer according to claim 2, characterized in that: The second heating component comprises a heating coil (21), a second heating medium is arranged in the heating coil (21), and the heating coil (21) is arranged in a spiral winding manner.

5. The device for removing volatile components from polyolefin elastomer polymer according to claim 1, characterized in that: The stirring assembly (30) comprises a stirring connecting rod and a plurality of stirring members connected to the stirring connecting rod. The stirring connecting rod is arranged in the flash chamber (100) along the height direction of the flash chamber (100). The stirring connecting rod rotates to drive the stirring members to rotate synchronously, thereby stirring the polyolefin elastomer polymer in the flash chamber (100).

6. The device for removing volatile components of polyolefin elastomer polymer according to claim 5, characterized in that: The plurality of stirring members include a U-shaped stirring member (31), wherein one end of the stirring connecting rod extends into an opening of the U-shaped stirring member (31) and is connected to the bottom of the U-shaped stirring member (31).

7. The device for removing volatile components from polyolefin elastomer polymer according to claim 5 or 6, characterized in that: The plurality of stirring members further include a spiral stirring member (32), wherein the spiral stirring member (32) is spirally wound around the stirring connecting rod along the circumference of the stirring connecting rod.

8. The device for removing volatile components from polyolefin elastomer polymer according to claim 5, characterized in that: The second heating component comprises a heating coil (21), a second heating medium is arranged in the heating coil (21), and the heating coil (21) is arranged in a circumferential spiral along the stirring connecting rod.

9. The device for removing volatile components from polyolefin elastomer polymer according to claim 5, characterized in that: The first heating medium is heating steam, and / or the second heating medium is heat transfer oil.

10. A method for removing volatile components from a polyolefin elastomer polymer, the method being carried out using the device for removing volatile components from a polyolefin elastomer polymer according to any one of claims 1 to 9, characterized in that: The method comprises the following steps: Adjusting the pressure in the flash chamber (100) to a first preset pressure value P1, wherein 3 kPa≤P1≤10 MPa; The heating steam is introduced into the heating space (120), wherein the pressure of the heating steam is a second preset pressure value P2, 0.4 MPa≤P2≤5.5 MPa; The heat transfer oil is introduced into the heating coil (21), wherein the temperature of the heat transfer oil is a first preset temperature T1, 100° C.≤T1≤300° C.; Controlling the stirring component (30) to stir at a preset stirring speed, wherein the preset stirring speed is greater than or equal to 20 r / min and less than or equal to 400 r / min; A raw material liquid is introduced into the flash chamber (100), wherein the feed temperature T2 of the raw material liquid is 100° C. to 200° C., the feed pressure P2 of the raw material liquid is 0.1 MPa to 10 MPa, and the feed rate of the raw material liquid is 5 kg / h to 1000 kg / h; After the raw material liquid stays in the flash chamber (100) for a preset time t, the volatile components of the raw material liquid are released from the gas phase pipe (16), wherein 5min≤t≤120min.

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