CN110652738A - Sustainable membrane type desorption volatile device that gives heat - Google Patents
Sustainable membrane type desorption volatile device that gives heat Download PDFInfo
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- CN110652738A CN110652738A CN201911038702.8A CN201911038702A CN110652738A CN 110652738 A CN110652738 A CN 110652738A CN 201911038702 A CN201911038702 A CN 201911038702A CN 110652738 A CN110652738 A CN 110652738A
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- 239000012528 membrane Substances 0.000 title claims abstract description 41
- 238000003795 desorption Methods 0.000 title description 3
- 229920000642 polymer Polymers 0.000 claims abstract description 79
- 239000011552 falling film Substances 0.000 claims abstract description 77
- 239000000463 material Substances 0.000 claims abstract description 53
- 239000010408 film Substances 0.000 claims abstract description 45
- 239000007788 liquid Substances 0.000 claims abstract description 20
- 230000008676 import Effects 0.000 claims abstract description 4
- 239000007792 gaseous phase Substances 0.000 claims abstract 2
- 239000007789 gas Substances 0.000 claims description 19
- 238000010438 heat treatment Methods 0.000 claims description 12
- 238000007789 sealing Methods 0.000 claims description 3
- 239000012071 phase Substances 0.000 claims 3
- 239000000126 substance Substances 0.000 abstract description 9
- 235000017166 Bambusa arundinacea Nutrition 0.000 abstract 1
- 235000017491 Bambusa tulda Nutrition 0.000 abstract 1
- 241001330002 Bambuseae Species 0.000 abstract 1
- 235000015334 Phyllostachys viridis Nutrition 0.000 abstract 1
- 239000011425 bamboo Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 description 18
- 230000008569 process Effects 0.000 description 15
- 239000000178 monomer Substances 0.000 description 8
- 230000009471 action Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000006116 polymerization reaction Methods 0.000 description 4
- 239000002904 solvent Substances 0.000 description 4
- 229910001220 stainless steel Inorganic materials 0.000 description 4
- 239000010935 stainless steel Substances 0.000 description 4
- 238000001704 evaporation Methods 0.000 description 3
- 230000008020 evaporation Effects 0.000 description 3
- 230000005484 gravity Effects 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000035939 shock Effects 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- 238000012546 transfer Methods 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000007701 flash-distillation Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000010528 free radical solution polymerization reaction Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000000704 physical effect Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 238000007711 solidification Methods 0.000 description 2
- 230000008023 solidification Effects 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 230000006911 nucleation Effects 0.000 description 1
- 238000010899 nucleation Methods 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 239000013557 residual solvent Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000010409 thin film Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/06—Evaporators with vertical tubes
- B01D1/065—Evaporators with vertical tubes by film evaporating
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D1/00—Evaporating
- B01D1/22—Evaporating by bringing a thin layer of the liquid into contact with a heated surface
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
Abstract
The invention belongs to the technical field of chemical equipment, and particularly discloses a sustainable heat supply membrane type volatile removal device which comprises a cylinder body, a heat medium distributor, a falling film pipe fixing plate, a material distributor, a falling film pipe supporting plate, a falling film pipe, a heat medium inlet, a heat medium outlet, a polymer inlet and a polymer outlet; a plurality of layers of devolatilization plates which are obliquely arranged are arranged below the membrane falling tube supporting plate; the section of thick bamboo wall lower extreme of barrel still is equipped with gaseous phase export, devolatilizes board heat medium import and devolatilizes board heat medium export, and the devolatilization board is inside all to be equipped with the heat medium passageway, and devolatilizing board heat medium import, heat medium passageway and devolatilizing board heat medium export communicate in proper order. This device enables polymer steady devolatilization temperature and good mobility, and the material still can be devolatilized at the board department of devolatilizing when falling liquid film pipe department is devolatilized to guarantee that the material gets rid of the volatile component completely, devolatilizing is efficient.
Description
Technical Field
The invention relates to the field of chemical equipment, in particular to a membrane type volatile component removing device capable of supplying heat continuously.
Background
In the polymer or macromolecule industry, due to the kinetic and thermodynamic limitations of the polymerization reaction, there is a partial residue of monomers in the polymer product, and the presence of these monomers can seriously affect the performance of the product. In order to improve the properties of this part of the product, it is necessary to remove these monomers. In addition, a solution polymerization process adopted in a part of polymerization processes of the polymer needs to remove the solvent in the polymer with high efficiency after the solution polymerization is completed, so as to avoid the residual solvent in the polymer. Since most of the solvent remaining from the unreacted monomer in the polymer is volatile substances, it is necessary to remove the volatile substances from the polymer, and this process is generally called a devolatilization process.
The polymer devolatilization process is an indispensable key link in the polymer production field, and is ubiquitous from polyolefin to polyester. Devolatilization of polymers is a separation process that removes volatile components from the polymer in the melt phase. After the polymerization reaction is completed, volatile components must be removed in time after the polymerization is completed. The temperature for removing the volatile components is generally relatively high, between 50 and 380 ℃ and is related to the physical properties of the polymer to be devolatilized, the devolatilization pressure varies greatly and can be carried out at a pressure of a few pascals absolute to a few tens of bars absolute, depending mainly on the physical properties of the volatile substances contained in the polymer and on the requirements of the polymer product itself.
During devolatilization, the separation between the polymer component and the volatile component is based on the difference in volatility of the two under the same conditions, driven by the difference in chemical potential of the two. The chemical potential of volatile species in a polymer is a function of the temperature, concentration and pressure of the device in a particular phase, and the driving force for mass transfer can be enhanced by increasing the temperature of the polymer and decreasing the partial pressure of the species to diffuse it from the polymer phase to the gas phase.
At present, most of devolatilization of polymers adopts falling-strip flash devolatilization, spray devolatilization or extruder devolatilization, falling-strip flash devolatilization and spray devolatilization, and during the devolatilization process, due to evaporation of volatile components, the temperature of materials is reduced, the fluidity is reduced, and the method is not suitable for polymer systems with higher monomer content. The devolatilization of the extruder has low devolatilization efficiency, large equipment investment and high operating cost, and the devolatilization process of a polymer system with high monomer content is difficult to meet.
Disclosure of Invention
In view of the above-mentioned shortcomings of the prior art, the present invention aims to provide a membrane devolatilization device capable of continuously supplying heat, which is used for solving the problems of equipment blockage, low devolatilization efficiency, etc. caused by the fact that the temperature of a high-viscosity melt or polymer is reduced, the viscosity is increased, the fluidity is deteriorated, and the polymer cannot flow in a devolatilizer due to volatilization of volatile matters during the devolatilization process.
In order to achieve the above and other related objects, the present invention provides a membrane devolatilization device capable of continuously supplying heat, comprising a cylinder, wherein a heat medium distributor, a falling membrane tube fixing plate and a material distributor are sequentially arranged in the cylinder from top to bottom, a plurality of vertically arranged falling membrane tubes and heat medium tubes are arranged in the cylinder, the falling membrane tubes are sleeved on the heat medium tubes, openings are arranged at the upper ends of the falling membrane tubes, the lower ends of the falling membrane tubes are closed, and openings are arranged at the upper ends and the lower ends of the heat medium tubes; the upper ends of the film falling pipe and the heating medium pipe are fixedly arranged on the film falling pipe fixing plate, the lower end of the film falling pipe penetrates through the material distributor, and the material distributor is positioned at the upper end of the film falling pipe; a heat medium inlet is formed in the top of the cylinder body and communicated with the heat medium pipe; a heat medium outlet and a polymer inlet are formed in the upper end of the cylinder wall of the cylinder body, the position of the heat medium outlet is higher than the top end of the falling film pipe, the heat medium outlet is communicated with the falling film pipe, and the position of the polymer inlet is located between the falling film pipe fixing plate and the material distributor; the bottom of the cylinder body is provided with a polymer outlet communicated with the polymer inlet; a plurality of layers of devolatilization plates which are obliquely arranged are arranged below the falling film tube supporting plate, and the devolatilization plates are arranged in a staggered mode along the vertical direction; the lower end of the cylinder wall of the cylinder body is provided with a gas phase outlet, a devolatilization plate heat medium inlet and a devolatilization plate heat medium outlet, and the position of the gas phase outlet is higher than that of the top devolatilization plate; the inside heat medium passageway that all is equipped with of devolatilization board, devolatilization board heat medium import, heat medium passageway and devolatilization board heat medium export communicate in proper order.
The working principle of the basic scheme is as follows: the heat medium enters the heat medium distributor from the heat medium inlet, enters the heat medium pipe, flows into the falling film pipe from the lower end of the heat medium pipe, then flows from the inside of the falling film pipe from bottom to top, and finally flows out from the heat medium outlet at the upper end of the cylinder; the polymer or viscous solution containing volatile components enters the material distributor from the polymer inlet, the material distributor uniformly distributes materials on the outer wall of the falling film pipe, so that the materials uniformly flow on the outer wall of the falling film pipe from top to bottom in a falling film mode under the action of gravity and then continuously flow downwards in a film shape along the devolatilization plate, the materials exchange heat with the falling film pipe in the flowing process, the devolatilization components are volatilized, the volatile.
Further, the number of the devolatilization plates is 1-20, and the distance between the devolatilization plates is 100-800 mm.
Furthermore, the included angle between the devolatilization plate and the horizontal direction is 10-80 degrees. The specific angle of the devolatilizer plate may be adjusted for different polymer properties.
Further, the inside falling liquid film pipe backup pad that is located the material distributor and takes off between the board that still is provided with of barrel, falling liquid film pipe backup pad is located the lower extreme department that falls the membrane pipe, is equipped with the through-hole of a plurality of positions and falling liquid film pipe one-to-one in the falling liquid film pipe backup pad, and the lower extreme that falls the membrane pipe passes the through-hole. In addition to the connections necessary for support strength,of support plates for the falling film tubesThe non-perforated area is provided with a large-area hollowed-out design, so that high-viscosity fluid and volatile gas-phase components can smoothly pass through the non-perforated areaFalling film tube supporting plate. Falling liquid film pipe backup pad mainly plays to support limiting displacement to falling liquid film pipe, avoids the device in transportation, hoist and mount, use etc. and because of rocking and lead to falling liquid film pipe to take place radial movement, the lower extreme that falls the membrane pipe simultaneously is the free end, does not fix in falling liquid film pipe backup pad, and the falling membrane pipe of being convenient for freely stretches out and draws back to eliminate the influence of the stress that the in-process arouses by expend with heat and contract with cold of devolatilizing.
Further, the through hole in the falling film tube supporting plate is larger than the outer diameter of the falling film tube. The falling film tube is allowed to move radially by a small amount, and meanwhile, materials can smoothly pass through the falling film tube support plate without any influence on the flowing of the materials.
Further, a baffle is arranged inside the cylinder body, and the baffle is obliquely arranged at the gas phase outlet. The arrangement of the baffle can avoid the polymer from entering a gas phase outlet to cause the blockage of a pipeline.
Further, the gas phase outlet is connected with a condenser for condensing, collecting and removing the volatile components.
Further, the condenser can be connected with a vacuum device, the vacuum device comprises a trap and a vacuum pump, and the trap is a spray trap or a cooling trap.
Furthermore, a plurality of fixing elements are arranged between the heat medium pipe and the falling film pipe so as to avoid the vibration and the shock of the heat medium pipe.
Further, the fixed component includes that a plurality of level sets up and along the backup pad of heat medium pipe circumference equipartition, and the one end fixed connection of backup pad is on the outer wall of heat medium pipe, and the other end of backup pad contacts with the inner wall that falls the membrane pipe. The supporting plate adopts single-side welding, so that the falling film pipe has a certain moving space while the vibration and the shock of the heat medium pipe are avoided.
Furthermore, the quantity of fixed component is three, and three fixed component interval evenly distributed sets up along vertical direction in proper order.
Further, falling liquid film pipe fixed plate and barrel inner wall sealing connection, falling liquid film pipe fixed plate are bilayer structure, and the upper end fixed connection of heat medium pipe falls the upper strata of membrane pipe fixed plate, falls the upper end fixed connection of membrane pipe in the lower floor of falling liquid film pipe fixed plate. The space in the middle of two fixed plates is the passageway of heat medium circulation, and the enclosed construction of double-deck fixed plate can avoid heat medium and material mixture and pollute the material, the flow of the heat medium of being convenient for simultaneously.
As described above, the membrane devolatilization apparatus of the present invention, which can continuously supply heat, has the following advantageous effects:
1. when adopting this device to devolatilize, high viscosity fuse-element or polymer are along falling the film pipe outer wall from last to flowing down the film form in the barrel, in the flow, accomplish the desorption of volatile component, it can incessant heat transfer to carry out with the polymer to fall the film pipe, make the polymer can maintain stable devolatilization temperature, keep good mobility, avoid because the flash distillation of volatile component, lead to the polymer temperature to descend and the material mobility that arouses descends, the solidification, thereby block up the devolatilization device, and then solve the problem because the material mobility that volatile component flash distillation or volatilization lead to becomes poor, avoid the volatile component solidification and block up the devolatilization device. Meanwhile, the materials flow in a film shape in the devolatilization device, and have large specific surface area and long residence time, which is beneficial to the removal of the volatile components of the polymer.
2. In the invention, when the materials are devolatilized at the falling film pipe, the materials are further devolatilized at the devolatilization plate, so that the materials are ensured to be completely devolatilized, and the devolatilization efficiency is effectively improved.
3. Since in conventional devolatilization processes the material needs to be kept in a superheated state before entering the devolatilization device in order to have enough heat in the devolatilization device to supply the endothermic heat of volatilization of the volatile components, the polymer temperature in the superheated state will be very high, which is very disadvantageous for heat-sensitive substances. The inside of the devolatilization device can carry out continuous heat exchange, thereby avoiding the overheating state of the polymer and being beneficial to reducing the thermal degradation of the thermosensitive polymer.
In summary, the devolatilization device provided by the present invention has great operation flexibility, and is particularly suitable for heat-sensitive polymers and polymers with great monomer content or solvent content. The device of the invention can be used independently, and two or more sets of devices can be used in series until the final required devolatilization effect is achieved.
Drawings
FIG. 1 is a longitudinal cross-sectional view of an apparatus in an embodiment of the invention;
fig. 2 is a top view of the support plate of the falling film reactor of fig. 1.
Fig. 3 is a transverse cross-sectional view of the descender tube of fig. 1.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention.
It should be noted that the drawings provided in the present embodiment are only for illustrating the basic idea of the present invention, and the components related to the present invention are only shown in the drawings rather than drawn according to the number, shape and size of the components in actual implementation, and the type, quantity and proportion of the components in actual implementation may be changed freely, and the layout of the components may be more complicated. The structures, proportions, sizes, and other dimensions shown in the drawings and described in the specification are for understanding and reading the present disclosure, and are not intended to limit the scope of the present disclosure, which is defined in the claims, and are not essential to the art, and any structural modifications, changes in proportions, or adjustments in size, which do not affect the efficacy and attainment of the same are intended to fall within the scope of the present disclosure. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.
Description of reference numerals:
the device comprises a heating medium inlet 1, a heating medium distributor 2, a heating medium outlet 3, a material distributor 4, a falling film pipe 5, a heating medium pipe 6, a cylinder 7, a falling film pipe fixing plate 8, a falling film pipe supporting plate 9, a through hole 91, a gas phase outlet 10, a gas phase port baffle 11, a devolatilization plate heating medium outlet 12, a devolatilization plate 13, a polymer outlet 14, a devolatilization plate heating medium inlet 15, a polymer inlet 16 and a supporting plate 17.
As shown in fig. 1, a membrane type devolatilization device capable of continuously supplying heat comprises a cylinder body 7, wherein a heat medium distributor 2, a falling membrane tube fixing plate 8, a material distributor 4 and a falling membrane tube supporting plate 9 are sequentially arranged in the cylinder body 7 from top to bottom, a plurality of vertically arranged falling membrane tubes 5 and heat medium tubes 6 are arranged in the cylinder body 7, the falling membrane tubes 5 are sleeved on the heat medium tubes 6, the upper ends of the falling membrane tubes 5 are provided with openings, the lower ends of the falling membrane tubes 5 are closed, and the upper ends and the lower ends of the heat medium tubes 6 are provided with openings; the upper ends of the film falling pipe 5 and the heating medium pipe 6 are fixedly arranged on a film falling pipe fixing plate 8, the lower end of the film falling pipe 5 sequentially penetrates through a material distributor 4 and a film falling pipe supporting plate 9, the material distributor 4 is positioned at the upper end of the film falling pipe 5, and the film falling pipe supporting plate 9 is positioned at the lower end of the film falling pipe 5; the top of the cylinder 7 is provided with a heat medium inlet 1, and the heat medium inlet 1 is communicated with a heat medium pipe 6; a heating medium outlet 3 and a polymer inlet 16 are arranged at the upper end of the cylinder wall of the cylinder body 7, the position of the heating medium outlet 3 is higher than the top end of the falling film pipe 5, the heating medium outlet 3 is communicated with the falling film pipe 5, and the position of the polymer inlet 16 is between the falling film pipe fixing plate 8 and the material distributor 4; the bottom of the cylinder 7 is provided with a polymer outlet 14 communicated with a polymer inlet 16; a plurality of layers of devolatilization plates 13 which are obliquely arranged are arranged below the falling film tube supporting plate 9, and the devolatilization plates 13 are arranged in a staggered manner along the vertical direction; the lower end of the cylinder wall of the cylinder body 7 is provided with a gas phase outlet 10, a devolatilization plate heat medium inlet 15 and a devolatilization plate heat medium outlet 12, and the position of the gas phase outlet 10 is higher than that of the uppermost devolatilization plate 13; the inside of the devolatilization plate 13 is provided with a heat medium channel, and the devolatilization plate heat medium inlet 15, the heat medium channel and the devolatilization plate heat medium outlet 12 are communicated in sequence.
The barrel 7 provides a suitable environment for devolatilization of the materials, including inert gas flow, suitable devolatilization pressure, and the like, and simultaneously plays a role in supporting the whole equipment.
The heat medium inlet 1 is a passage for the heat medium to enter the device and is used for providing a proper devolatilization temperature for the devolatilization device. The heat medium outlet 3 is an outlet of the heat medium and returns to the heat medium system for circulation in the next cycle.
A polymer inlet 16, which is the passage for the polymer to be treated to enter the devolatilizer. The polymer outlet 14 is the passage through which the devolatilized material exits the devolatilizer.
The heat medium distributor 2 is located below the heat medium inlet 1, after the heat medium enters the cylinder 7, the heat medium distributor 2 ensures that the heat medium is uniformly distributed between each film falling pipe 5 and each heat medium pipe 6, the structure form of the heat medium distributor is a horizontal round stainless steel plate with holes, and the edge of the horizontal round stainless steel plate is welded with a circle of vertical stainless steel plate with holes.
The material distributor 4 is an external falling film distributor which uniformly distributes the polymer on the outer wall of the falling film pipe 5, so that the polymer uniformly flows outside the falling film pipe 5 in a falling film mode under the action of gravity. The outer falling film device needs to bear certain pressure, and the polymer is uniformly distributed outside the falling film pipe 5 through the pressure under the action of the delivery pump.
The falling film pipe 5 is a falling film devolatilization area, a heat medium on the inner side of the falling film pipe 5 flows from bottom to top to form a stable temperature gradient, the temperature gradually rises from top to bottom, and a material on the outer side of the falling film pipe 5 flows from top to bottom. In the devolatilization process of the polymer, the temperature of the polymer is reduced along with the volatilization of volatile components, and the heat can be quickly supplemented to the initial temperature by the falling film tube 5, so that the temperature fluctuation of the polymer in the devolatilization process is extremely small, and the stability of the devolatilization operation is ensured.
The heat medium pipe 6 is arranged inside the falling film pipe 5 and plays a role in guiding and conveying the heat medium. Three fixing elements are arranged between the heat medium pipe 6 and the falling film pipe 5 so as to avoid the vibration and the shock of the heat medium pipe 6. Referring to fig. 3, the fixing element is composed of three supporting plates 17 which are horizontally arranged and uniformly distributed along the circumferential direction of the heat medium pipe 6, the supporting plates 17 are stainless steel plates and are arranged at intervals of 120 degrees along the circumferential direction of the heat medium pipe 6, the supporting plates 17 are welded on a single surface, that is, one end of each supporting plate 17 is fixedly connected to the outer wall of the heat medium pipe 6, and the other end of each supporting plate 17 is in contact with the inner wall of the falling film pipe 5. The fixing member can further prevent the heat medium pipe 6 from being shaken and shaken.
Falling liquid film pipe fixed plate 8 is bilayer structure, and the upper end welding of heat medium pipe 6 falls the upper strata of membrane pipe fixed plate 8, and the upper end welding of falling liquid film pipe 5 falls the lower floor of membrane pipe fixed plate 8, and falls liquid film pipe fixed plate 8 and 7 inner wall sealing connection of barrel, and the space in the middle of two fixed plates is the passageway of heat medium circulation, and the enclosed construction of bilayer fixed plate can avoid heat medium and material mixture and contaminated material, the flow of the heat medium of being convenient for simultaneously.
Referring to fig. 2, the falling film tube supporting plate 9 is a porous structure, a plurality of through holes 91 are formed in the falling film tube supporting plate 9, the through holes 91 are in one-to-one correspondence with the falling film tubes 5, the lower ends of the falling film tubes 5 penetrate through the through holes 91, and the through holes 91 are larger than the outer diameters of the falling film tubes 5; except for the necessary connection of the supporting strength of the falling film tube supporting plate 9, the non-perforated area of the falling film tube supporting plate 9 is provided with a large-area hollow design, so that high-viscosity fluid and volatile gas-phase components can smoothly pass through the falling film tube supporting plate. Falling film tube backup pad 9 mainly plays to support limiting displacement to falling film tube 5, and avoiding device is in transportation, hoist and mount, use etc. and because of rocking and lead to falling film tube 5 to take place radial movement, and the lower extreme that falls film tube 5 simultaneously is the free end, does not fix on falling film tube backup pad 9, and it is flexible freely to be convenient for fall film tube 5 to eliminate the influence of the stress that the in-process arouses by expend with heat and contract with cold of devolatilizing. The through hole 91 on the falling film tube supporting plate 9 is larger than the outer diameter of the falling film tube 5, so that the falling film tube 5 is allowed to move in a small amount in the radial direction, and meanwhile, the materials can smoothly pass through the falling film tube supporting plate 9 without any influence on the flowing of the materials.
The gas phase outlet 10, which provides a passage for the removed volatile components out of the cylinder 7, can be a vacuum, a slight positive pressure and a positive pressure, which can range from a few pascals to a few tens of bars, depending on the characteristics of the polymer and of the volatile substances. In addition, the gas phase outlet 10 is connected to a condenser for condensing and collecting the removed volatile components. Specifically, the condenser can link to each other with vacuum apparatus, vacuum apparatus includes trap and vacuum pump, the trap is for spraying trap or cooling trap, and vacuum apparatus and condenser cooperation can fully condense the collection with volatile component.
The inside of the cylinder 7 is provided with a baffle which is obliquely arranged at the gas phase outlet 10. The baffle is arranged to prevent the polymer from entering the gas phase outlet 10 and causing the blockage of the pipeline.
And the devolatilization plate heat medium inlet 15 is a passage for the heat medium in the devolatilization plate 13 to enter the devolatilization plate 13. The devolatilization plate heat medium outlet 12 is an outlet of the heat medium inside the devolatilization plate 13.
The devolatilization plate 13 is a place where the material enters the bottom of the devolatilization device for further devolatilization, a heat medium channel is arranged inside the devolatilization plate 13, and the material can be further heated in the devolatilization plate 13. The material flows on the devolatilization plate 13 in the form of a thin film, has a large specific surface area, and can further separate volatile components in the polymer. Specifically, the included angle between the devolatilization plate 13 and the horizontal direction is 10-80 degrees, and the size of the specific angle can be adjusted and designed according to different polymer properties; the number of the devolatilization plates 13 is 1-20, and the distance between the devolatilization plates 13 is 100-800 mm.
The specific use process of the device is as follows:
the heat medium enters the heat medium distributor 2 from the heat medium inlet 1, enters the heat medium pipe 6, flows into the falling film pipe 5 from the lower end of the heat medium pipe 6, then flows from the bottom to the top from the inner side of the falling film pipe 5, and finally flows out from the heat medium outlet 3 at the upper end of the cylinder 7; the polymer or viscous solution containing volatile components enters the material distributor 4 from the polymer inlet 16 at a certain temperature, and the material distributor 4 uniformly distributes materials on the outer wall of the falling film pipe 5, so that the materials uniformly flow from top to bottom on the outer wall of the falling film pipe 5 in a falling film mode under the action of gravity; in the flowing process of the materials, because the pressure in the cylinder 7 is lower than the pressure of the materials entering the devolatilization device, when the polymers enter the devolatilization device, partial flash evaporation is firstly carried out, the materials after flash evaporation flow into a film shape on the outer wall of the falling film pipe 5, and simultaneously, the polymers exchange heat with the falling film pipe 5, so that the temperature of the polymers is kept stable and controllable. The polymer flows on the outer wall of the falling film pipe 5, and simultaneously carries out nucleation, diffusion and escape processes, thereby increasing the specific surface area of polymer devolatilization and ensuring that the polymer has enough time to complete the mass transfer of the devolatilization process in a devolatilization device. Materials with volatile components not completely removed in the falling film tube 5 can further enter the lower devolatilization plate 13 for further devolatilization; while the devolatilized component flows out of the barrel 7 in the form of a gas phase from a gas phase outlet 10, and finally the devolatilized material flows out from a polymer outlet 14.
The devolatilization device provided by the invention has great operation flexibility, is particularly suitable for heat-sensitive polymers and polymers with great monomer content or solvent content, and further completes the devolatilization operation at the devolatilization plate 13 while performing the devolatilization by the falling film pipe 5, thereby having high treatment efficiency. The device can be used independently, and two or more sets of devices can be connected in series for use until the final required devolatilization effect is achieved.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (10)
1. The membrane type volatile component removing device capable of supplying heat continuously is characterized by comprising a cylinder body, wherein a heat medium distributor, a falling membrane pipe fixing plate and a material distributor are sequentially arranged in the cylinder body from top to bottom, a plurality of vertically arranged falling membrane pipes and heat medium pipes are arranged in the cylinder body, the falling membrane pipes are sleeved on the heat medium pipes, openings are formed in the upper ends of the falling membrane pipes, the lower ends of the falling membrane pipes are closed, and openings are formed in the upper ends and the lower ends of the heat medium pipes; the upper ends of the film falling pipe and the heating medium pipe are fixedly arranged on the film falling pipe fixing plate, the lower end of the film falling pipe penetrates through the material distributor, and the material distributor is positioned at the upper end of the film falling pipe; a heat medium inlet is formed in the top of the cylinder body and communicated with the heat medium pipe; a heat medium outlet and a polymer inlet are formed in the upper end of the cylinder wall of the cylinder body, the position of the heat medium outlet is higher than the top end of the falling film pipe, the heat medium outlet is communicated with the falling film pipe, and the position of the polymer inlet is located between the falling film pipe fixing plate and the material distributor; the bottom of the cylinder body is provided with a polymer outlet communicated with the polymer inlet; a plurality of layers of devolatilization plates which are obliquely arranged are arranged below the falling film tube supporting plate, and the devolatilization plates are arranged in a staggered mode along the vertical direction; the lower end of the cylinder wall of the cylinder body is provided with a gas phase outlet, a devolatilization plate heat medium inlet and a devolatilization plate heat medium outlet, and the position of the gas phase outlet is higher than that of the top devolatilization plate; the inside heat medium passageway that all is equipped with of devolatilization board, devolatilization board heat medium import, heat medium passageway and devolatilization board heat medium export communicate in proper order.
2. The apparatus of claim 1, wherein: the number of the devolatilization plates is 1-20, and the distance between the devolatilization plates is 100-800 mm.
3. The apparatus of claim 2, wherein: the included angle between the devolatilization plate and the horizontal direction is 10-80 degrees. The specific angle of the devolatilizer plate may be adjusted for different polymer properties.
4. The apparatus of claim 1, wherein: the barrel is inside still to be provided with and to be located the material distributor and take off the falling liquid film pipe backup pad between the board, falling the lower extreme department that the membrane pipe backup pad is located and falls the membrane pipe, falling the through-hole that is equipped with a plurality of positions and falling liquid film pipe one-to-one in the membrane pipe backup pad, the lower extreme that falls the membrane pipe passes the through-hole.
5. The apparatus of claim 4, wherein: the through hole on the falling film tube supporting plate is larger than the outer diameter of the falling film tube.
6. The apparatus of claim 1, wherein: the inside baffle that is equipped with of barrel, the baffle slope sets up in gaseous phase exit.
7. The apparatus of claim 1, wherein: the gas phase outlet is connected with a condenser for condensing, collecting and removing the volatile components.
8. The apparatus of claim 1, wherein: and a plurality of fixing elements are arranged between the heat medium pipe and the falling film pipe.
9. The apparatus of claim 8, wherein: the fixed component comprises a plurality of supporting plates which are horizontally arranged and uniformly distributed along the circumferential direction of the heat medium pipe, one end of each supporting plate is fixedly connected to the outer wall of the heat medium pipe, and the other end of each supporting plate is in contact with the inner wall of the film falling pipe.
10. The apparatus of claim 1, wherein: falling liquid film pipe fixed plate and barrel inner wall sealing connection, falling liquid film pipe fixed plate are bilayer structure, and the upper end fixed connection of heat medium pipe falls the upper strata of membrane pipe fixed plate, falls the upper end fixed connection of membrane pipe in the lower floor of falling liquid film pipe fixed plate.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911038702.8A CN110652738A (en) | 2019-10-29 | 2019-10-29 | Sustainable membrane type desorption volatile device that gives heat |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911038702.8A CN110652738A (en) | 2019-10-29 | 2019-10-29 | Sustainable membrane type desorption volatile device that gives heat |
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| CN110652738A true CN110652738A (en) | 2020-01-07 |
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| CN201911038702.8A Pending CN110652738A (en) | 2019-10-29 | 2019-10-29 | Sustainable membrane type desorption volatile device that gives heat |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112871104A (en) * | 2021-01-14 | 2021-06-01 | 浙江理工大学 | Falling film devolatilizer and falling film element thereof |
| CN113145022A (en) * | 2021-05-26 | 2021-07-23 | 大连鼎燕医药化工有限公司 | Continuous pyrolysis fluorination process and equipment for arylamine hydrogen fluoride diazonium salt |
| CN113797593A (en) * | 2021-08-24 | 2021-12-17 | 安徽丰原化工装备有限公司 | Liquid devolatilization device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI862703A0 (en) * | 1986-06-25 | 1986-06-25 | Ahlstroem Oy | INDUNSTARE AV ROERTYP. |
| CN201244370Y (en) * | 2008-08-07 | 2009-05-27 | 苏州市兴科现代中药工艺装备开发有限公司 | Plate-type free falling film vacuum concentrator |
| CN203389347U (en) * | 2013-07-10 | 2014-01-15 | 无锡力马化工机械有限公司 | Evaporator for concentrating and desolventizing of high-viscosity materials |
| CN209205310U (en) * | 2018-06-26 | 2019-08-06 | 浙江理工大学 | Falling film type devolatilizer and its falling liquid film element |
| CN211158629U (en) * | 2019-10-29 | 2020-08-04 | 上海东庚化工技术有限公司 | Sustainable membrane type desorption volatile device that gives heat |
-
2019
- 2019-10-29 CN CN201911038702.8A patent/CN110652738A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI862703A0 (en) * | 1986-06-25 | 1986-06-25 | Ahlstroem Oy | INDUNSTARE AV ROERTYP. |
| CN201244370Y (en) * | 2008-08-07 | 2009-05-27 | 苏州市兴科现代中药工艺装备开发有限公司 | Plate-type free falling film vacuum concentrator |
| CN203389347U (en) * | 2013-07-10 | 2014-01-15 | 无锡力马化工机械有限公司 | Evaporator for concentrating and desolventizing of high-viscosity materials |
| CN209205310U (en) * | 2018-06-26 | 2019-08-06 | 浙江理工大学 | Falling film type devolatilizer and its falling liquid film element |
| CN211158629U (en) * | 2019-10-29 | 2020-08-04 | 上海东庚化工技术有限公司 | Sustainable membrane type desorption volatile device that gives heat |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112871104A (en) * | 2021-01-14 | 2021-06-01 | 浙江理工大学 | Falling film devolatilizer and falling film element thereof |
| CN113145022A (en) * | 2021-05-26 | 2021-07-23 | 大连鼎燕医药化工有限公司 | Continuous pyrolysis fluorination process and equipment for arylamine hydrogen fluoride diazonium salt |
| CN113145022B (en) * | 2021-05-26 | 2024-06-25 | 大连鼎燕医药化工有限公司 | Continuous pyrolysis fluoro process and equipment for aromatic amine hydrogen fluoride diazonium salt |
| CN113797593A (en) * | 2021-08-24 | 2021-12-17 | 安徽丰原化工装备有限公司 | Liquid devolatilization device |
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