CN212663507U

CN212663507U - Continuous flow reaction module, reactor and packing unit

Info

Publication number: CN212663507U
Application number: CN202020720315.4U
Authority: CN
Inventors: 杨凯; 宁萌; 张雯; 周在国; 杨勇
Original assignee: Nantong Weizhu Intelligent Technology Co ltd
Current assignee: Nantong Weizhu Intelligent Technology Co ltd
Priority date: 2020-05-01
Filing date: 2020-05-01
Publication date: 2021-03-09
Anticipated expiration: 2030-05-01

Abstract

The utility model relates to a continuous flow reaction module, reactor and filler unit, wherein continuous flow reaction module includes the outer tube and a plurality of filler units of settling in order in this outer tube. Each filler unit comprises a partition sieve plate, a confluent filler and a partition filler. The split screen plates have holes or slits formed therein to allow fluid to flow through both end faces thereof. Grooves are formed on the two end faces of the converged filler, and channels are formed between the bottom faces of the grooves. At least one end face of the split filler is provided with a groove and a plurality of channels communicated with the two end faces. The equivalent of the holes or gaps of the partition sieve plate is less than the equivalent diameter of the confluent packing and the partition packing. The inner wall of the outer pipe, the dividing sieve plate, the converging filler, the end face of the dividing filler and the grooves on the end face can be enclosed into a converging cavity, a reflecting mixed flow cavity and a distribution cavity, fluid flows between the cavities in sequence and is subjected to cutting-converging action continuously and circularly, the cutting-mixing action of the fluid in the flowing process can be strengthened, and the purposes of full mixing and efficient mixing are achieved.

Description

Continuous flow reaction module, reactor and packing unit

Technical Field

The utility model relates to a continuous flow reaction technical field, what it particularly involved is a can promote the fluid at the reaction module of continuous flow in-process mixed flow effect, is equipped with the reactor of this reaction module and establishes the packing unit in the reaction module.

Background

Tubular reactors, kettle reactors and the like are fluid reaction equipment commonly used in the chemical and pharmaceutical fields at present.

Wherein, the tank reactor is generally provided with a stirring device in the reaction tank for mixing liquid phase reactants, and has the problems of low purity of the compositions, low reaction conversion rate and serious energy consumption and pollution. Because of the high purity requirements of products in the chemical and pharmaceutical fields, the continuous flow tubular reactor is relatively a type of reaction equipment which uses more.

Given that the chemical reactant concentration and reaction rate within a tubular reactor vary with the length of the tube. Therefore, to achieve the desired effect, the tubular reactor is typically provided with a tube length that is required to satisfy the chemical reaction. In order to ensure the effect, if the existing straight tube reactor or U-shaped tube reactor needs to be internally provided with a longer tube length, the volume of the whole reactor is necessarily large enough. In addition, because the flowing state of the reactants in the reaction tube directly affects the uninterrupted mixing effect and the reaction heat transfer rate, a related design is urgently needed to avoid the excessively large volume of the reaction device, so that the purpose of improving the mixing effect and the reaction rate is achieved by changing the structure in the pipeline under the condition of ensuring that the tube length is basically unchanged.

To overcome some of the disadvantages of tubular reactors, some microchannel-structured reactors have been developed in the prior art. The microchannel reactor is beneficial to mixing different substances in the fluid in a continuous flow process by the actions of impact (fluid-fluid, fluid-channel wall), cutting, confluence, turbulence and the like when the fluid flows in the microchannel. Therefore, compared with a tubular reactor, the microchannel reactor can achieve the purpose of obviously improving the mixing effect of the fluid under the condition of basically equivalent length.

SUMMERY OF THE UTILITY MODEL

The utility model provides a continuous flow reaction module, its structure can strengthen the cutting-mixing action of fluid at the flow in-process, and makes fluid mix mass transfer efficiency and is showing and strengthen, reachs the purpose that realizes intensive mixing and high-efficient mixture.

In addition, the utility model also relates to a reactor provided with the reaction module and a filler unit which is arranged in the reaction module and can influence the cutting-mixing effect.

The technical proposal adopted by the utility model for solving the technical problem relates to a continuous flow reaction module, a reactor and a filler unit.

Aiming at the continuous flow reaction module, the scheme is as follows:

a continuous flow reaction module includes an outer tube and a plurality of packing elements disposed within the outer tube. The plurality of packing units are sequentially arranged in the outer pipe. Each filler unit comprises a partition sieve plate, a confluent filler and a partition filler, and the filler units are sequentially arranged according to the sequence of the partition sieve plate, the confluent filler and the partition filler, or the filler units are sequentially arranged according to the sequence of the confluent filler, the partition filler and the partition sieve plate. In this way, between two adjacent filler units, the downstream end surface of the upstream divided filler is opposite to the upstream end surface of the downstream divided sieve plate; or, between two adjacent filler units, the downstream end surface of the upstream dividing sieve plate is opposite to the upstream end surface of the downstream confluent filler.

The spacing between the partition screen plates, the merged packing and the partition packing in each packing unit can be completely consistent or partially consistent or completely different for a plurality of packing units arranged in the same outer pipe. Furthermore, the spacing between the opposing faces of two adjacent packing elements may also be uniform or partially uniform or completely different.

The internal diameter of the outer tube is generally controlled in the range of 2mm to 100mm, preferably in the interval of 5mm to 20 mm. The side walls of the partition sieve plate, the converged filler and the partition filler are in contact with the inner wall of the outer pipe and are pressed to be relatively fixed.

The partition sieve plates are formed with regular or irregular holes or gaps so that fluid can flow from one end face to the other end face of the partition sieve plate. Grooves are respectively formed on two end faces of the converged filler, and a channel for communicating the two grooves is formed between the bottom faces of the two grooves. At least the end face at the upstream of the two end faces of the split packing is provided with a groove, and the two ends of the split packing extend to the edges of the two end faces respectively and are provided with a plurality of channels which can communicate the two end faces, the number of the channels can be two, three, five or eight, and the channels are generally uniformly distributed around the circumference at intervals.

In the following two cases, the downstream end surface of the dividing filler can not form a groove structure, namely (1) between two adjacent filler units, the opposite surface between the dividing filler in the upstream filler unit and the dividing sieve plate in the downstream filler unit is provided with a distance; (2) in one packing unit, the opposed faces between the converging packing and the dividing screen are spaced. In both cases, it is also advisable to form a groove structure on the downstream end face of the split packing if the formed pitch is relatively small. When the downstream end face of the partition filler does not form a groove structure, fluid enters the channel from the joint of the groove of the upstream end face and the channel port and then flows out to the spacing space from the joint of the edge of the downstream end face and the channel port. If the opposed faces between the split packing and the split screen plates are in contact or there is only a gap formed by fitting in the aforementioned case (1), it is necessary to form a groove structure on the downstream end face of the split packing. If the opposed faces between the confluent packing and the divided screen plates are in contact or there is only a gap formed by fitting in the aforementioned case (2), it is also necessary to form a groove structure on the downstream end faces of the divided packing. In short, as a preferable mode, grooves are formed on both end faces of the split packing, and both ends of the channel formed on the split packing extend to the notch edges of the grooves formed on both end faces respectively and communicate the two grooves.

The equivalent diameter of the holes or gaps formed on the dividing sieve plate is far smaller than that of the merged filler and the channels arranged on the dividing filler. Or the channel width of the holes or the gaps formed on the dividing sieve plate is far smaller than the channel width of each channel arranged on the converging filler and the dividing filler.

In certain embodiments, the dividing screen may be provided with a thickness or axial dimension in the range of 0.1mm to 50mm, preferably in the range of 1mm to 5 mm. The radial dimension (or equivalent diameter) of the holes or slits formed in the divided sieve plate may be set in the range of 1 μm to 800 μm, and preferably set in the range of 10 μm to 200 μm. When the channel is in an irregular change state in the whole length of the holes or the gaps, the value is a range interval when the equivalent diameter is understood, and the value intervals of different holes or gaps on the same partition sieve plate can be not identical, namely, are close to each other; on the segmentation sieve plate arranged at different positions, the value intervals of the holes or the gaps can be different.

The partition sieve plate can be made of materials with porous structures, such as sintered metal powder, sintered metal mesh, metal sponge foam, sintered ceramic powder, ceramic sponge foam, a micropore plate processed by laser, a melt-blown plastic mesh block and the like. In each filler unit, the included dividing sieve plate, the confluent filler and the dividing filler are in contact with or have a distance between the opposite end surfaces of the adjacent two. Between two adjacent packing elements, between the facing surfaces of the upstream divided packing and the downstream divided screening deck, or between the facing surfaces of the upstream divided screening deck and the downstream merged packing, may be in contact or spaced.

After the filler unit is arranged in the outer pipe, a converging cavity is formed between the inner wall of the outer pipe and the converging filler and/or the dividing sieve plate, and liquid can flow downstream through a channel arranged on the converging filler after converging; a reflecting mixed flow cavity is formed between the inner wall of the outer pipe and the converging filler and the dividing filler, liquid flows into the reflecting mixed flow cavity from the converging cavity and then flows towards a channel port arranged on the dividing filler along the radial direction to flow to the downstream, and during the process, the liquid is continuously acted by the bottom surfaces of the two grooves of the reflecting mixed flow cavity to circularly flow back so as to be fully mixed; a distribution cavity is formed between the inner wall of the outer pipe and the partition filler and between the inner wall of the outer pipe and the partition sieve plate, and when the liquid flows into the distribution cavity from the reflection mixed flow cavity, the liquid can continuously converge towards the cavity along the radial direction, and finally the liquid is redistributed on the end surface of the partition sieve plate in the cavity and then continuously flows downstream.

The outer diameter and the size of the converged filler are the same as the inner diameter of the outer pipe, the axial length of the converged filler is 2-20 mm, preferably 5-10 mm, the diameter of the pore passage of the upper channel is 0.1-5 mm, and the converged filler is matched with the corresponding inner diameter of the outer pipe to determine a specific value, preferably 0.5-2 mm.

The outer diameter of the split filler is the same as the inner diameter of the outer pipe, the axial length is 2mm-20mm, the axial length is preferably 5-10 mm, the number of the upper channels is at least 2, more channels need to be matched with the inner diameter of the outer pipe, 10 channels or even 100 channels or more channels can be designed, the shapes of the channels can be semicircular or irregular besides circular hole shapes, the axial direction of the through holes can be parallel to the axial direction of the outer pipe or form a certain included angle, and the purpose is to play a role in rough splitting.

In other embodiments, the bottom surface of the groove arranged on the end surface of the confluent packing is an arc surface.

In other embodiments, the bottom surface of the groove formed in the end surface of the split filler is an arc surface.

In other embodiments, one or both end surfaces of the dividing screen plate may also be provided with a cambered or spherical groove, and may be a groove or a plurality of grooves distributed in a plane.

In some other embodiments, the downstream end of the channel on the merged filler extends to the outside of the bottom surface of the groove on the downstream end surface of the merged filler to form a nozzle, and the port of the nozzle extends into the groove on the end surface of the merged filler on the downstream side or extends out of the port of the groove on the end surface of the merged filler on the downstream side.

In some other embodiments, the channel disposed on the merged filler is a through hole, and an axis of the through hole is located at an axial center of the merged filler.

In some other embodiments, the channel disposed on the merged filler is a plurality of through holes, wherein an axis of one through hole is located at an axial center of the merged filler, and the other through holes are disposed around the axial center of the merged filler, or all the through holes are disposed around the axial center of the merged filler. Preferably, the axis of the through hole arranged at the periphery of the axial center of the confluent packing is inclined relative to the axial direction of the confluent packing, and one end at the downstream is close to the axial center of the confluent packing. When the channel with a plurality of through holes is adopted, one end of each through hole or one end of part of the through holes are provided with the spray pipe.

In other embodiments, the channel provided on the partition filler may be a groove provided on the sidewall thereof or a through hole provided at the inner edge of the sidewall. Preferably, the groove formed on the side wall of the divided filler is an inclined groove, that is, the extending direction of the groove is inclined with respect to the vertical line on the side wall, and further, the bottom surface of the groove is an inclined surface and is inclined in the direction from upstream to downstream toward the axis of the divided filler. Preferably, the grooves formed in the side walls of the segmented filler are spiral grooves.

Preferably, the through hole at the inner side edge of the side wall of the divided packing may have an axis extending direction that coincides with the axis direction of the divided packing or may be inclined in a direction from upstream to downstream toward the axis of the divided packing.

In other embodiments, the split sieve plate, the confluent packing and the split packing in the packing unit are connected into a whole through an inserting structure. Or the split sieve plates, the converged filler and the split filler in the filler unit are connected into a whole through the ring body, the ring body is preferably a spiral ring, and external threads are arranged at the end parts of the side walls of the split sieve plates, the converged filler and the split filler to be matched with the spiral ring, so that the adjustment and control of the distance between the split sieve plates, the converged filler and the split filler are convenient.

For the continuous flow reactor, the scheme is as follows:

a continuous flow reactor comprising a continuous flow reaction module of one of the above mentioned forms, i.e. the continuous flow reactor may comprise only one of the above mentioned forms of continuous flow reaction module, or may comprise a plurality of the above mentioned forms of continuous flow reaction modules at the same time.

The scheme of the packing unit is as follows:

a filler unit comprises a split sieve plate, a converged filler and a split filler, and is sequentially arranged according to the sequence of the split sieve plate, the converged filler and the split filler, or sequentially arranged according to the sequence of the converged filler, the split filler and the split sieve plate.

The partition sieve plates are formed with regular or irregular holes or gaps so that fluid can flow from one end face to the other end face of the partition sieve plate. Grooves are respectively formed on two end faces of the converged filler, and a channel for communicating the two grooves is formed between the bottom faces of the two grooves. The end face at least positioned at the upstream of the two end faces of the split filler is provided with a groove, and the two ends of the end face extend to the edges of the two end faces respectively and are provided with a plurality of channels capable of communicating the two end faces, the number of the channels can be two, three, four or six, and the channels are generally uniformly distributed at intervals around the circumference or not.

The radial size of the holes or gaps formed on the dividing sieve plate is smaller than the radial size of each channel arranged on the converging filler and the dividing filler. Or the channel width of the holes or the gaps formed on the dividing sieve plate is smaller than the channel width of each channel arranged on the converging filler and the dividing filler.

In certain embodiments, the thickness or axial dimension of the dividing screen may be set in the range of 0.1mm to 50mm, preferably in the range of 1mm to 5mm, such as 1.1mm or 2.3mm or 2.6mm or 4.2 mm.

In certain embodiments, the channel width of the holes or slits formed in the segmented screen plate may be set in the range of 1 μm to 800 μm, preferably in the range of 10 μm to 200 μm, such as 15 μm to 60 μm or 105 μm to 130 μm or 135 μm to 180 μm. The partition sieve plate can be made of materials with porous structures, such as sintered metal powder, sintered metal mesh, metal sponge foam, sintered ceramic powder, ceramic sponge foam, a micropore plate processed by laser, a melt-blown plastic mesh block and the like. Since the holes or slits in the divided screen plates are sometimes formed naturally during the manufacturing process, the radial dimension thereof is not a fixed value and is discrete, even though the radial dimension of different sections of a connected hole or slit may be different. Moreover, even if the micro-holes are formed by laser processing, the pore size of each micro-hole may be different, so that the pore sizes of all the micro-holes are discrete values within an interval.

In the filler unit, the relative end surfaces of the adjacent split sieve plates, the confluent filler and the split filler are in contact or have a distance.

In other embodiments, one or both end surfaces of the dividing screen plate may also be provided with a groove having an arc surface, and the groove may be one groove or a plurality of grooves distributed in the plane.

In some other embodiments, the downstream end of the channel on the merged filler extends to the outside of the bottom surface of the groove on the downstream end surface of the merged filler to form a nozzle, and the port of the nozzle extends into the groove on the downstream end surface of the merged filler or extends out of the port of the groove on the downstream end surface of the merged filler.

In other embodiments, the channel provided on the partition filler may be a groove provided on the sidewall thereof or a through hole provided at the inner edge of the sidewall.

Preferably, the groove formed on the side wall of the divided filler is an inclined groove, that is, the extending direction of the groove is inclined with respect to the vertical line on the side wall, and further, the bottom surface of the groove is an inclined surface and is inclined in the direction from upstream to downstream toward the axis of the divided filler. Preferably, the grooves formed in the side walls of the segmented filler are spiral grooves.

The utility model has the advantages that: considering that the fluid is impacted (between fluid and between fluid and channel walls), cut, jointed, turbulent flow and the like when flowing in the micro-channel to promote the mixing of different substances in the fluid, wherein the most effective action is the cutting-jointing action which is forced mixing obtained by utilizing the momentum of the fluid, the patent aims to provide a structure capable of strengthening the action so as to strengthen the mass transfer efficiency of the fluid mixing by thousands of times compared with the macroscopic mixing. Therefore, in general, the scheme of the patent has the effects of strengthening the cutting-mixing effect of the fluid in the flowing process, obviously strengthening the mass transfer efficiency of the fluid mixture, and achieving the purposes of full mixing and high-efficiency mixing.

In particular, the screening plates provided can cut fluids to the micrometer scale, whereas ordinary microreactors are only on the millimeter scale. Three-dimensional mixing is realized in a three-dimensional space, while two-dimensional mixing is realized in a planar space only by a common microreactor. Compared with the common plate structure, the module has a tubular structure, and the formed integral channel has more excellent pressure resistance, theoretically can reach the pressure resistance level of hundreds of megapascals, and a common microreactor can only reach about 5 megapascals, so the safety of the reactor can be greatly improved. The pipe end of the module is convenient to seal, disassemble, assemble and clean. The modular structure is formed, standard parts are convenient to form, processing, manufacturing and assembling are convenient, large-scale production can be realized, and the cost is reduced.

Drawings

FIG. 1 is a schematic cross-sectional view of one embodiment of a microchannel reactor module.

Fig. 2.1 is a structural diagram of the state of the packing unit.

Fig. 2.2 is a structural schematic diagram of a state two of the packing units.

Fig. 2.3 is a schematic structural view of the coarse segmented packing, 2.31 is a top view, and 2.32 is a bottom view.

Fig. 2.4 is a schematic structural view of the confluent packing, 2.41 is a top view, and 2.42 is a bottom view.

FIG. 3.1 is a schematic view of the state three structure of the packing unit.

Fig. 3.2 is a schematic top view of the merged packing in the embodiment shown in fig. 3.1.

Fig. 3.3 is a schematic top view of the coarse-grained filler in the embodiment shown in fig. 3.1.

Fig. 4 is a schematic top view of an embodiment of a coarse segmented packing.

FIG. 5 is a schematic front view of an embodiment of a coarse segmented packing.

Fig. 6 is a schematic perspective view of an embodiment of a coarse segmented packing.

Fig. 7.1 is a state four-structure schematic diagram of the packing unit.

Fig. 7.2 is a schematic view of the lower confluent packing of the embodiment of fig. 7.1, with 7.21 being a top view and 7.22 being a bottom view.

Fig. 7.3 is a schematic top view of the embodiment of fig. 7.1 showing a coarse-grained filler.

Fig. 8 is a schematic diagram of a state five structure of the packing unit.

FIG. 9 is a schematic cross-sectional view of an embodiment of a confluent packing.

FIG. 10 is a schematic cross-sectional view of another embodiment of a microchannel reactor module.

In the figure: 10 outer tube, 20 filler unit; 1 segmentation sieve, 2 confluence filler, 21 channels I, 22 grooves I, 23 grooves II, 24 flanges, 25 slots, 3 segmentation filler, 31 channels II, 32 grooves III, 33 grooves IV, 34 cuttings, 4 confluence cavity, 5 reflection mixing cavity, 6 distribution cavity, 7 ring body and 8 nozzles.

Detailed Description

The drawings in the specification show the structure, ratio, size, etc. only for the purpose of matching with the content disclosed in the specification, so as to be known and read by those skilled in the art, and not for the purpose of limiting the present invention, so the present invention does not have the essential meaning in the art, and any structure modification, ratio relationship change or size adjustment should still fall within the scope covered by the technical content disclosed in the present invention without affecting the function and achievable purpose of the present invention. Meanwhile, the terms "upper", "lower", "front", "rear", "middle", and the like used in the present specification are for the sake of clarity only, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof are also considered to be the scope of the present invention without substantial changes in the technical content.

In a first aspect, the present invention relates to a continuous flow reaction module.

A continuous flow reaction module as shown in fig. 1, 10 includes an outer tube 10 and a plurality of packing elements 20 disposed inside the outer tube 10. The plurality of packing units 20 are sequentially arranged in the outer tube 10. When the whole outer pipe is a straight pipe, the plurality of packing units are sequentially arranged along the axial straight line of the pipe. When the outer pipe is a U-shaped pipe, the plurality of packing units are sequentially arranged along the U-shaped bent line. The end of the outer tube may be provided with a connection structure, such as an external thread and/or an internal thread. The end of the outer tube may be provided with a sealing end cap or one end may be provided directly as a sealing structure integral with the tube.

Each of the packing units 20 includes a split sieve plate 1, a merged packing 2, and a split packing 3, and is sequentially arranged according to the sequence of the split sieve plate 1, the merged packing 2, and the split packing 3 (see fig. 2.1, fig. 2.2, fig. 7.1, and fig. 8), or sequentially arranged according to the sequence of the merged packing 2, the split packing 3, and the split sieve plate 1 (see fig. 3.1). In this way, between two adjacent packing elements 20, the downstream end face of the upstream divided packing 3 is opposed to the upstream end face of the downstream divided screen plate 1; alternatively, between two adjacent packing elements 20, the downstream end face of the upstream divided screen plate 1 is opposed to the upstream end face of the downstream merged packing 2.

The divided screen plates 1 are formed with regular or irregular holes or slits so that fluid can flow from one end face to the other end face of the divided screen plates 1 (i.e., from the end face on the upstream side to the end face on the downstream side).

A first groove 22 and a second groove 23 are respectively formed on two end faces of the confluent packing 2, and a first channel 21 for communicating the two grooves is formed between the bottom faces of the first groove 22 and the second groove 23.

In the solutions shown in fig. 1 to 2.4, the first passage 21 provided in the merged filler 2 is a through hole, and the axis of the through hole is located at the axial center of the merged filler 2 (which may be coincident or non-coincident).

In the solutions shown in fig. 3.1 to 3.2, the first channel 21 provided on the merged filler 2 is a plurality of through holes, an axis of one through hole is located at an axial center of the merged filler 2, and the other through holes are distributed around the axial center of the merged filler 2. Or in other embodiments, all of the through holes are disposed about the axial center of the converging packing. Preferably, the axis of the through hole arranged at the periphery of the axial center of the confluent packing is inclined relative to the axial direction of the confluent packing, and one end of the axis of the through hole at the downstream is close to the axial center of the confluent packing.

As shown in fig. 1 to 2.2 and 10, the bottom surfaces of the first groove 22 and the second groove 23 provided on the end surface of the merged filler 2 are both arc surfaces (including spherical forms). The arc surface here may be an arc surface having one outer circle center, or a consecutive arc surface formed by a plurality of arc surfaces having a plurality of outer circle centers and/or inner circle centers (as shown in the drawings, these arc surfaces are all the same). The arc shape of the first groove 22 and the arc shape of the second groove 23 may be the same or different. The arcs of the first grooves and the arcs of the second grooves, which are contained in different packing units and are used for converging the packing, can also be different or partially identical with each other. The difference between the first groove and the second groove is mainly reflected by the depth of the grooves and the size of the notches, and the notches are preferably in a flaring mode which is flared outwards.

In order to more effectively discharge the fluid in a converged manner, as shown in the embodiments of fig. 8 to 10, the downstream end of the first channel 21 provided on the converged filler 2 extends to the outside of the bottom surface of the groove provided on the end surface located downstream of the converged filler 2 to form the nozzle 8, in other words, the downstream end of the first channel 21 provided on the converged filler 2 extends to the outside of the bottom surface of the second groove 23 provided on the converged filler 2 to form the nozzle 8. The port of the nozzle extends into the second groove 23 (as shown in fig. 8 and 10) or extends out of the port of the second groove 23 (as shown in fig. 9). When the first passage 21 is formed in a structure of a plurality of through holes, it may be required that one end of each through hole or one end of a part of the through holes is formed with the nozzle. The free end port of the nozzle can be in a taper hole shape (the large end faces outwards or inwards).

The two end faces of the split packing 3 are respectively provided with a groove III 32 and a groove IV 33, the split packing 3 is further provided with a plurality of channels II 31, and two ends of each channel II 31 respectively correspond to the notch edge of the groove III 32 and the notch edge of the groove IV 33. The communication between the third groove 32 and the fourth groove 33 by the second passage 31 is established between both end faces of the split packing 3 for the fluid to flow from one end face to the other end face.

The bottom surfaces of the third groove 32 and the fourth groove 33 arranged on the end surface of the segmented packing 3 are both cambered surfaces (including spherical surfaces). Similarly, the arc surface may be an arc surface having one outer circle center, or a consecutive arc surface formed by a plurality of arc surfaces having a plurality of outer circle centers and/or inner circle centers (as shown in the drawings, the same applies). The arc of the third groove 32 is different from the arc of the fourth groove 33, but this does not exclude the possibility of being the same. The arcs of the third groove and the fourth groove of the split packing in different packing units may also be different or partially the same. As shown, the depth of groove three is significantly greater than the depth of groove four. The difference between groove three and groove four can also be reflected in the size of the notches, which are also preferably flared in the form of outwardly flaring.

As shown in fig. 1 to 2.4 and fig. 5 to 7.3, the second channel 31 provided on the split filler 3 is specifically a groove provided on the side wall thereof. In this case, the side wall of the groove on which the split packing 3 is disposed may be a straight groove along the line of measurement thereof, or may be an inclined groove inclined with respect to the line of measurement, that is, the extending direction of the groove is inclined with respect to the (axial) vertical line on the side wall (as shown in fig. 5). Further, the bottom surface of the groove is inclined and inclined in a direction from upstream to downstream toward the axis of the divided packing, as shown in fig. 5. Preferably, the grooves formed on the side walls of the segmented packing are spiral grooves (see fig. 6). The grooves forming the second channel 31 are designed into a chute or spiral groove form, so that multiple strands of fluid can form reflection impact in the cavity or intersect in the cavity in a rotating state when converging to form turbulent mixed flow, collision can be generated among different particles of the fluid to strengthen the converging effect, different components in the fluid are split and then collide and converge from the center, the distribution state of each component in the fluid is changed again, and the fluid can be further guaranteed to be fully and efficiently mixed.

As shown in fig. 3.1 to 4 and 8 to 10, the second channel 31 formed on the split filler 3 is specifically formed in the through hole at the inner edge of the sidewall. Preferably, the through hole at the inner edge of the sidewall of the divided packing may have an axis extending in the same direction as the axis of the divided packing (as shown), or may be inclined in a direction from upstream to downstream toward the axis of the divided packing (also, the plurality of fluids may be reflected and collided).

The equivalent diameter of the holes or gaps formed on the dividing sieve plate is smaller than the equivalent diameter of the merged filler and the equivalent diameter of each channel I21 and channel II 31 arranged on the dividing filler.

In some embodiments, the inner diameter of the outer tube is controlled in the range of 2mm to 100mm, preferably in the interval of 5mm to 20 mm.

The converged filler 2 is formed by processing a first circular hole-shaped channel 21 from two bowl-shaped groove bottoms on the upper end surface and the lower end surface, the outer diameter of the converged filler 2 is the same as the inner diameter of the outer pipe 10, the height (axial length) of the converged filler 2 is 2mm-20mm, preferably 5-10 mm, the diameter of a pore channel of the first channel 21 is 0.1 mm-5 mm, and the diameter of the pore channel is matched with the inner diameter of the corresponding outer pipe, preferably 0.5-2 mm.

The split packing 3 is composed of bowl-shaped depressions on the upper and lower end faces and a second channel 31 at the outer edge, and the second channel 31 contains a plurality of round holes. The outer diameter of the split filler 3 is the same as the inner diameter of the outer tube 10, and the height (axial length) is 2mm-20mm, preferably 5-10 mm. The number of the circular holes (i.e. the rough dividing channels) forming the second channel 31 is at least 2, and more channels need to match the inner diameter of the

outer tube

10, and 10 or even 100 or more channels can be designed. The shape can be semicircular or irregular except for a round hole shape, and the axial direction of the through hole can be parallel to the axial direction of the outer tube or form a certain included angle, so that the purpose of coarse segmentation is achieved.

In some embodiments, the partition screen plate may be made of a porous material, such as sintered metal powder, sintered metal mesh, metal sponge foam, sintered ceramic powder, ceramic sponge foam, laser processed microporous plate, melt blown plastic mesh block, and the like. The thickness (axial length) of the dividing screen may be set in the range of 0.1mm to 50mm, preferably in the interval of 1mm to 5 mm. The radial dimension (or channel width) of the holes or slits formed in the divided screen plate may be set in the range of 1 μm to 800 μm, and preferably in the range of 10 μm to 200 μm.

In each filler unit, the opposite end faces of the adjacent two filler units can be in contact or spaced between the contained divided sieve plates, the merged filler and the divided fillers, as shown in fig. 1 to 2.2. Between two adjacent packing elements, between the upstream divided packing and the opposite face of the downstream divided screening deck, or between the upstream divided screening deck and the opposite face of the downstream merged packing, may be in contact or spaced, see fig. 1, 10, spacing L1, L₂.., etc., may be the same or partially different.

After the filler unit 20 is arranged in the outer pipe 10, the side walls of the partition sieve plate 1, the confluent filler 2 and the partition filler 3 are all in contact with the inner wall of the outer pipe 10. In assembly, a thermal assembly process is mostly adopted, so that the side walls of the partition sieve plate 1, the confluence filler 2 and the partition filler 3 are tightly pressed with the inner wall of the outer pipe, and the partition sieve plate 1, the confluence filler 2 and the partition filler 3 are ensured not to move relatively in the pipe cavity in use. Of course, if the outer pipe is a structure in which the two half pipes are fastened, the positions of the split sieve plate 1, the converged filler 2 and the split filler 3 which are correspondingly arranged outside the outer pipe can be provided with hoops so that the side walls of the split sieve plate 1, the converged filler 2 and the split filler 3 are pressed together with the inner wall of the outer pipe. The outer pipe can be understood as a plurality of unit pipes which are sequentially connected together through a threaded structure or a plug-in structure, and at the moment, the opposite ends of the two connected unit pipes are in accordance with the arrangement rule of the filler units in the whole outer pipe body. Set up the outer tube into the unit form, can put convenient equipment, conveniently will cut apart sieve 1, join filler 2, cut apart filler 3 and put into intraductally and be convenient for again hold the axial interval between two adjacent filler units in the operation.

A confluence cavity 4 is formed between the inner wall of the outer pipe 10 and the confluence filler 2 and/or the split screen plate 1, and fluid (or liquid) can flow downstream through a first channel 21 arranged on the confluence filler 2 after being converged; a reflecting mixed flow cavity 5 is formed between the inner wall of the outer pipe 10 and the merging filler 2 and the dividing filler 3, after the liquid flows into the reflecting mixed flow cavity 5 from the merging cavity 4, the liquid can flow towards the port of the second channel 31 arranged on the dividing filler 3 along the radial direction, is roughly divided into a plurality of strands and flows to the downstream, and during the period, the liquid can continuously receive the bottom surface reflection action of the two grooves (the second groove 23 and the third groove 32) of the reflecting mixed flow cavity 5 to circularly carry out backflow to form mixed turbulence, so that the full mixing (the reflecting and backflow strength can be influenced by the specific state of the fluid jetted out by the first channel, for example, after a spray pipe structure is arranged, the reflecting and backflow strength is more violent, and the effect is better); a distribution cavity 6 is formed between the inner wall of the outer pipe 10 and the partition filler 3 and the partition sieve plate 1, when the liquid flows into the distribution cavity 6 from the reflection mixed flow cavity 5, the liquid is continuously converged into the cavity along the radial direction, finally the liquid is redistributed on the end surface of the partition sieve plate 1 in the cavity, and then the liquid is sheared into a plurality of fine strands again and continuously flows downstream to the downstream converging cavity 4, and the liquid circulates sequentially.

In the embodiment shown in fig. 1 and 10, the packing unit 20 is constituted by arranging the divided screen plate 1, the merged packing 2, and the divided packing 3 in this order. Therefore, when the fluid flows in from the inlet end of the outer pipe 10, the fluid is first forced to be cut into fine strands through the holes or slits of the divided screen plate 1 and then flows into the merging chamber 4. Then the fluid enters the reflective mixing cavity 5 from the converging cavity 4 through the first channel 21, collides with the reflective wall formed by the bottom walls of the second and

third grooves

23 and 32, is rebounded by the reflective wall and is vigorously collided and mixed with the upper fluid, and is partially roughly divided into n streams by the second channel 31, the n streams flow to the distribution cavity and are uniformly distributed on the end surface of the partition sieve plate 1, enter the gap in the partition sieve plate and are further divided into micron-sized extremely-multiple streams, the fine streams enter the downstream converging cavity 4 again through the partition sieve plate, are converged and mixed in the cavity, enter the downstream one-stage reflective mixing cavity 5 through the first channel of the downstream one-stage, and circularly move forward in the process to realize high-efficiency mixing mass transfer. After the nozzle 8 is formed at the downstream port of the first channel 21, the reflection frequency and the impact strength in the reflection flow mixing cavity 5 can be enhanced, and the reflection mixing effect is further improved.

As shown in fig. 7.1 to 8, the divided sieve plates 1, the merged filler 2 and the divided fillers 3 in the filler unit 20 are connected to each other by an inserting structure to form a whole (see fig. 7.1 to 7.3), or the divided sieve plates 1, the merged filler 2 and the divided fillers 3 in the filler unit 20 are connected to each other by the ring body 7 to form a whole, and preferably, the ring body 7 is a spiral ring, and the end parts of the side walls of the divided sieve plates 1, the merged filler 2 and the divided fillers 3 are provided with external threads to match with the spiral ring, so that the size of the distance between the divided sieve plates 1, the merged filler 2 and the divided fillers 3 is conveniently adjusted and controlled (see fig. 8 and 10).

In addition, there is a need forIt is noted that, for a plurality of packing elements 20 arranged in the same outer pipe 10, the size of the distance between the divided screen plates 1, the merged packing 2 and the divided packing 3 in each packing element 20 may be completely or partially identical or completely different. Further, the spacing (L as shown) between the facing surfaces of two adjacent packing elements 20₁、L₂..) may also be identical or partially identical or completely different.

Secondly, the patent also relates to a continuous flow reactor in which the continuous flow reaction module concerned is applied.

The continuous flow reactor comprises the continuous flow reaction module in a certain form, namely the continuous flow reactor can only comprise the continuous flow reaction module in a certain form, and can also comprise a plurality of continuous flow reaction modules in a plurality of forms. The continuous flow reactor further comprises a heat exchange clamp or a heat exchange shell and the like arranged on the periphery of the outer pipe 10.

Finally, the patent also relates to a packing element, which is an important component in the continuous flow reaction module concerned.

A packing unit as shown in fig. 2.1 to 9 comprises a divided sieve plate 1, a merged packing 2 and a divided packing 3, and is arranged in the order of the divided sieve plate 1, the merged packing 2 and the divided packing 3, or in the order of the merged packing 2, the divided packing 3 and the divided sieve plate 1 (see fig. 3.1).

The partition sieve plate 1 can be made of materials with porous structures, such as sintered metal powder, sintered metal mesh, metal sponge foam, sintered ceramic powder, ceramic sponge foam, a micropore plate processed by laser, a melt-blown plastic mesh block and the like. Regular or irregular holes or gaps can be formed on the segmentation sieve plates, and the purpose is to ensure that fluid can flow from one end face of the segmentation sieve plate to the other end face through the body.

The thickness of the partition screen plate 1 may be set in the range of 0.1mm to 50mm, preferably in the range of 1mm to 5mm, for example, 1.1mm or 2.3mm or 2.6mm or 4.2 mm. The radial dimension (or channel width) of the holes or slits formed in the divided screen plate 1 may be set in the range of 1 μm to 800 μm, preferably in the range of 10 μm to 200 μm, for example, 15 μm or 60 μm or 105 μm or 130 μm or 180 μm. Since the holes or slits in the divided screen plates are sometimes formed naturally during the manufacturing process, the radial dimension thereof is not a fixed value and is discrete, even though the radial dimension of different sections of a connected hole or slit may be different. Moreover, even if the micro-holes are formed by laser processing, the pore size of each micro-hole may be different, so that the pore sizes of all the micro-holes are discrete values within an interval. For the understanding of a particular value given above, it is to be understood that it represents either an average or a central value (the particular value is shifted above or below the central value).

Two end faces of the confluent packing 2 are respectively provided with a first groove 22 and a second groove 23, a first channel 21 for communicating the two grooves is formed between the first groove 22 and the bottom face of the second groove 23, and the first channel 21 can be a cylindrical hole, a prismatic hole, a semi-cylindrical hole or a special-shaped hole and the like. The height (axial length) of the confluent packing 2 is 2mm-20mm, preferably 5-10 mm, and the diameter of the pore channel of the first channel 21 is 0.1 mm-5 mm, preferably 0.5-2 mm. The diameter of the channel in this section, if not circular, should be understood in terms of equivalent diameter.

The two end faces of the split packing 3 are respectively provided with a groove III 32 and a groove IV 33, and are also provided with a plurality of channels II 31, two ends of each channel II 31 respectively extend to the notches of the two grooves and communicate the two grooves, in other words, the split packing 3 is provided with a plurality of channels II 31 communicating the groove III 32 and the groove IV 33, and two end ports of each channel II 31 correspondingly extend to the notch edge of the groove III 32 and the notch edge of the groove IV 33. The height (axial length) of the cutting filler 3 is 2mm-20mm, preferably 5-10 mm. The number of the circular holes (i.e. the roughly divided channels) forming the second channel 31 is at least 2, and more channels can be designed into 10, even 100 or more channels under the necessary external structural size. The shape of the hole cavity of the second channel 31 can be a semi-cylindrical or prismatic hole or an irregular hole or a groove besides a cylindrical hole.

In the context of the language of this patent, diameters of channels, slits, cavities, passages, etc., if not circular, are understood in terms of equivalent diameters.

It can be seen that the equivalent diameter of the holes or gaps formed on the divided screen plate 1 is much smaller than the equivalent diameter of each channel provided on the merged packing and the divided packing.

As shown in fig. 1 to 2.2 and 7.1 to 10, the filler unit 20 may include split screen plates 1, confluent fillers 2 and split fillers 3, and the opposite end surfaces of the adjacent split screen plates and the adjacent split fillers may be in contact with each other (including a case where a gap is formed due to assembly) or spaced apart from each other.

The groove bottoms of the first groove 22 and the second groove 23 arranged on the end face of the confluent packing 2 are both cambered surfaces (including spherical surfaces). The groove bottoms of the third groove 32 and the fourth groove 33 arranged on the end surface of the split packing 3 are cambered surfaces (including spherical surfaces). The arc surface may be an arc surface having one outer circle center, or a consecutive arc surface formed by a plurality of arc surfaces having a plurality of outer circle centers and/or inner circle centers (as shown in fig. 1 to 10, they all belong to this category). The arc shape of the first groove 22 and the arc shape of the second groove 23 may be the same or different. The arc of the third groove 32 may be the same as or different from the arc of the fourth groove 33. The arcs of the first grooves and the arcs of the second grooves, which are contained in different packing units and are used for converging the packing, can also be different or partially identical with each other. The difference between the first groove and the second groove is mainly reflected by the depth of the grooves and the size of the notches, and the notches are preferably in a flaring mode which is flared outwards. The arcs of the third groove and the fourth groove of the split packing in different packing units may also be different or partially the same. The difference between the third groove and the fourth groove is mainly reflected by the depth of the groove and the size of the notch, and the notch is preferably in a flaring form which is flared outwards. For example, as shown in fig. 2.1 to 2.3, the groove depth of the third groove 32 is significantly greater than that of the fourth groove 33, and the notch of the third groove 32 is smaller than that of the fourth groove 33.

One or two end surfaces of the partition sieve plate can also be provided with cambered or spherical grooves, and the grooves can be one groove or a plurality of grooves distributed in the surface.

As shown in fig. 8 to 10, the downstream end of the first channel 21 on the merged filler 2 extends to the outside of the bottom surface of the groove on the end surface downstream of the merged filler 2 to form the nozzle 8, in other words, the downstream end of the first channel 21 on the merged filler 2 extends to the outside of the bottom surface of the second groove 23 on the merged filler 2 to form the nozzle 8. The port of the nozzle extends into the second groove 23 (as shown in fig. 8 and 10) or extends out of the port of the second groove 23 (as shown in fig. 9). When the first passage 21 is formed in a structure of a plurality of through holes, it may be required that one end of each through hole or one end of a part of the through holes is formed with the nozzle. The free end port of the nozzle can be in a taper hole shape (the large end faces outwards or inwards).

The structure of the nozzle 8 extending outwards is arranged so as to more effectively mix and eject the fluid, and the fluid enters a downstream cavity to form a reflecting and mixed flow state so as to better achieve the aim of being uniformly mixed again.

In some embodiments, the first passage 21 may be configured according to the venturi principle.

As shown in fig. 1 to 2.4, the first passage 21 of the merged filler 2 is a circular hole, and the axis of the circular hole is located at the axial center of the merged filler.

As shown in fig. 3.1 to 3.2, the first passage 21 formed in the merged filler 2 is a plurality of circular holes, wherein an axis of one circular hole is located at an axial center of the merged filler 2, and the other circular holes are distributed on a periphery of the axial center of the merged filler. In other embodiments, all the circular holes may also be disposed on the periphery of the axis of the confluent packing, and distributed around the circular ring or distributed in a cross or X shape, etc. Preferably, the axis of the circular hole provided at the periphery of the axial center of the merged packing is inclined with respect to the axial direction of the merged packing and one end at the downstream side is located close to the axial center of the merged packing. When the first passage 21 with a plurality of circular holes is adopted, one end of each circular hole or one end of part of the circular holes is provided with the spray pipe 8.

As shown in fig. 1 to 2.4, 5 and 6, the second channel 31 formed on the split filler 3 is specifically a plurality of grooves formed on the side wall thereof. Here, the grooves formed on the side walls of the divided packing may be inclined grooves, i.e. the grooves extend in an inclined direction relative to the (axial) vertical line on the side wall, or further, the bottom surfaces of the grooves are inclined planes and inclined in a direction from upstream to downstream toward the axis of the divided packing (see fig. 6). In other embodiments, the grooves on the side walls of the split packing can also be spiral grooves (see fig. 5). The grooves forming the second channel 31 are designed into a chute or spiral groove form, so that multiple strands of fluid can form reflection impact or meet in a rotating state when converging to form turbulent mixed flow, different particles in the fluid can generate collision to strengthen converging effect, different components in the fluid are split and then collide and converge, the distribution state of each component in the fluid is changed again, and the fluid can be further guaranteed to be fully and efficiently mixed.

As shown in fig. 3.1 to 4, 8 and 10, the second channel 31 formed on the split filler 3 is specifically a plurality of through holes formed at the inner edge of the sidewall. Here, the axial extension direction of each through hole at the inner edge of the side wall of the divided packing may be aligned with the axial direction of the divided packing (in the illustrated case), or may be inclined in a direction approaching the axial center of the divided packing from upstream to downstream (similarly, the plural streams of fluid may be caused to be reflected and collided).

As shown in fig. 7.1 to 7.3, the divided sieve plate 1, the confluent packing 2 and the divided packing 3 in the packing unit 20 are connected to each other by an inserting structure to form a whole. An annular flange 24 is arranged at the edge of the upstream end face of the confluent packing 2, and the downstream end of the partition sieve plate 1 is inserted into the flange 24, so that the partition sieve plate 1 and the confluent packing 2 are integrally connected in an inserting way. A plurality of arc-shaped slots 25 distributed at intervals are arranged at the edge of the downstream end face of the converged filler 2, and inserting strips 34 correspondingly matched with the slots 25 are formed on the upstream end face of the split filler 3, so that the converged filler 2 and the split filler 3 are connected into a whole in an inserting manner.

As shown in fig. 8 and 10, the divided screen plates 1, the merged filler 2 and the divided fillers 3 in the filler unit 20 are integrally connected with each other through the ring body 7, and preferably, the ring body 7 is a spiral ring, and the side wall ends of the divided screen plates 1, the merged filler 2 and the divided fillers 3 are provided with external threads to match with the spiral ring, so that the adjustment and control of the distance between the divided screen plates, the merged filler and the divided fillers are facilitated.

The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. The present invention can be modified in many ways without departing from the spirit and scope of the present invention, and those skilled in the art can modify or change the embodiments described above without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may 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

1. A continuous flow reaction module characterized by: comprises an outer pipe and a plurality of packing units which are sequentially arranged in the outer pipe;

each filler unit comprises a partition sieve plate, a confluent filler and a partition filler, and the filler units are sequentially arranged according to the sequence of the partition sieve plate, the confluent filler and the partition filler, or the filler units are sequentially arranged according to the sequence of the confluent filler, the partition filler and the partition sieve plate;

regular or irregular holes or gaps are formed in the partition sieve plate, so that fluid can flow from one end face of the partition sieve plate to the other end face; grooves are respectively formed on two end faces of the converged filler, and a channel for communicating the two grooves is formed between the bottom faces of the two grooves; grooves are formed in at least the upstream end face of the two end faces of the split filler, and a plurality of channels which are capable of communicating the two end faces and of which the two ends extend to the edges of the two end faces respectively are arranged;

the equivalent diameter of the holes or gaps formed on the dividing sieve plate is smaller than that of the merged filler and the channels arranged on the dividing filler.

2. The continuous-flow reaction module of claim 1, wherein: the bottom surface of the groove arranged on the end surface of the converged filler is an arc surface, and/or the bottom surface of the groove arranged on the end surface of the segmented filler is an arc surface.

3. The continuous-flow reaction module of claim 1 or 2, wherein: the downstream end of the channel arranged on the confluent packing extends to the outside of the bottom surface of the groove arranged on the downstream end surface of the confluent packing and forms a nozzle.

4. The continuous-flow reaction module of claim 1 or 2, wherein: the partition sieve plate, the confluent filler and the partition filler in the filler unit are connected into a whole through an inserting structure; or the partition sieve plate, the confluent packing and the partition packing in the packing unit are connected into a whole through a ring body.

5. The continuous-flow reaction module of claim 4, wherein: the ring body is a spiral ring, and external threads matched with the spiral ring are arranged at the end parts of the side walls of the partition sieve plate, the confluence filler and the partition filler.

6. The continuous-flow reaction module of claim 1, wherein: the channel arranged on the partition filler is a groove arranged on the side wall or a through hole positioned at the inner side edge of the side wall.

7. The continuous-flow reaction module of claim 6, wherein: the grooves formed in the side walls of the divided fillers are inclined grooves or spiral grooves.

8. The continuous-flow reaction module of claim 6, wherein: the axial extension direction of the through hole at the inner side edge of the side wall of the divided filler is consistent with the axial direction of the divided filler, or the through hole inclines towards the direction close to the axial center of the divided filler from upstream to downstream.

9. A continuous flow reactor characterized by: comprising a continuous flow reaction module according to any of claims 1 to 5.

10. A packing element characterized by: the filler-separating device comprises a separating sieve plate, a converging filler and a separating filler, and is sequentially arranged according to the sequence of the separating sieve plate, the converging filler and the separating filler, or sequentially arranged according to the sequence of the converging filler, the separating filler and the separating sieve plate;

regular or irregular holes or gaps are formed in the partition sieve plate, so that fluid can flow from one end face of the partition sieve plate to the other end face; grooves are respectively formed on two end faces of the converged filler, and a channel for communicating the two grooves is formed between the bottom faces of the two grooves; grooves are formed in at least the upstream end face of the two end faces of the split filler, and a plurality of channels which are respectively extended to the edges of the two end faces and can communicate the two end faces are arranged;

11. The packing element of claim 10, wherein: the channel width of the holes or slits formed in the divided sieve plate is set in the range of 1 μm to 800 μm.

12. The packing element of claim 10 or 11, wherein: the downstream end of the channel arranged on the confluent packing extends to the outside of the bottom surface of the groove arranged on the downstream end surface of the confluent packing and forms a nozzle.

13. The packing element of claim 10 or 11, wherein: the partition sieve plate, the confluent filler and the partition filler in the filler unit are connected into a whole through an inserting structure; or the partition sieve plate, the confluent packing and the partition packing in the packing unit are connected into a whole through a ring body.

14. The packing element of claim 13, wherein: the ring body is a spiral ring, and external threads matched with the spiral ring are arranged at the end parts of the side walls of the partition sieve plate, the confluence filler and the partition filler.

15. The packing element of claim 13, wherein: the bottom surface of the groove arranged on the end surface of the converged filler is an arc surface.

16. The packing element of claim 13, wherein: the bottom surface of the groove arranged on the end surface of the cutting filler is an arc surface.

17. The packing element of claim 13, wherein: the channel arranged on the partition filler is a groove arranged on the side wall or a through hole positioned at the inner side edge of the side wall.

18. The packing element of claim 17, wherein: the grooves formed in the side walls of the divided fillers are inclined grooves or spiral grooves.

19. The packing element of claim 17, wherein: the axial extension direction of the through hole at the inner side edge of the side wall of the divided filler is consistent with the axial direction of the divided filler, or the through hole inclines towards the direction close to the axial center of the divided filler from upstream to downstream.