WO2021147211A1

WO2021147211A1 - Continuous flow reaction module, reactor, and filler units

Info

Publication number: WO2021147211A1
Application number: PCT/CN2020/089539
Authority: WO
Inventors: 杨凯; 宁萌; 张雯; 周在国; 杨勇
Original assignee: 南通微著智能科技有限公司
Priority date: 2020-01-20
Filing date: 2020-05-11
Publication date: 2021-07-29

Abstract

A continuous flow reaction module, a reactor, and filler units. The continuous flow reaction module comprises an outer pipe (10) and a plurality of filler units sequentially arranged in the outer pipe (10). Each filler unit comprises a partitioning sieve plate (1), a converging filler (2), and a partitioning filler (3). Holes or gaps are formed in the partitioning sieve plate (1), so that fluid can flow through the two end surfaces thereof. Recesses (22, 23) are formed in the two end surfaces of the converging filler (2), and a channel (21) is formed between the bottom surfaces of the recesses (22, 23). A recess (32, 33) is formed in at least one end surface of the partitioning filler (3), and the partitioning filler (3) is provided with a plurality of channels (31) communicating the two end surfaces thereof. The equivalent diameter of the holes or gaps of the partitioning sieve plate (1) is smaller than the equivalent diameter of the channels on the converging filler (2) and the partitioning filler (3). A converging cavity (4), a reflection mixed flow cavity (5), and a distribution cavity (6) can be defined by the inner wall of the outer pipe (10), the end surfaces of the partitioning sieve plate (1), the converging filler (2), and the partitioning filler (3), and the recesses in the end surfaces; the fluid sequentially flows among the cavities and is continuously and circularly subjected to a cutting-converging action.

Description

Continuous flow reaction module, reactor and packing unit

Technical field

The present invention relates to the technical field of continuous flow reaction, in particular, it relates to a reaction module capable of promoting the mixing effect of fluid in a continuous flow process, a reactor equipped with the reaction module and a packing unit in the reaction module.

Background technique

Tubular reactors and tank reactors are currently commonly used fluid reaction equipment in the chemical and pharmaceutical fields. Among them, the tank reactor is generally equipped with a stirring device in the reactor for mixing liquid phase reactants, which has the problems of low synthetic purity, low reaction conversion rate, and more serious energy consumption and pollution. Because the chemical and pharmaceutical fields have high requirements for product purity, continuous flow tubular reactors are relatively more types of reaction equipment.

In view of the fact that the chemical reactant concentration and reaction rate in the tubular reactor vary with the length of the tube. Therefore, in order to achieve the required effect, the tubular reactor is generally provided with a tube length that needs to meet the requirements of the chemical reaction. In order to ensure the effect, if the existing straight tube reactor or U-shaped tube reactor needs to set a longer tube length inside, the volume of the entire reactor must be large enough. In addition, because the flow state of the reactants in the reaction tube will directly affect the uninterrupted mixing effect and the heat transfer rate of the reaction, in order to avoid the excessive volume of the reaction device, relevant designs are urgently needed to ensure that the tube length is basically unchanged. Next, the purpose of improving the mixing effect and reaction rate is achieved by changing the internal structure of the pipeline.

In order to overcome some of the shortcomings of tubular reactors, some reactors with micro-channel structures have been developed in the prior art. The microchannel reactor will be subjected to impact (fluid-fluid, fluid-channel wall), cutting, merging, turbulence, etc. by means of fluid flowing in the microchannel, which is conducive to the mixing of different substances in the fluid during continuous flow. Therefore, compared with the tubular reactor, the microchannel reactor can achieve the purpose of significantly improving the mixing effect of the fluid under the condition that the length is basically equivalent.

Summary of the invention

The structure of the continuous flow reaction module provided by the present invention can strengthen the cutting-mixing effect of the fluid in the flow process, so that the fluid mixing and mass transfer efficiency is significantly enhanced, achieving the purpose of achieving full mixing and high-efficiency mixing. In addition, the present invention also relates to a reactor equipped with the reaction module and a filler unit arranged in the reaction module that can affect the cutting-mixing effect.

To achieve its purpose, the technical solution of the present invention relates to a continuous flow reaction module, a reactor and a packing unit.

A continuous flow reaction module. The solution is that the continuous flow reaction module includes an outer tube and a plurality of packing units arranged in the outer tube. The multiple packing units are arranged in sequence in the outer tube. Said packing units include divided screen plates, combined fillers and divided fillers, and are arranged in the order of divided screen plates, combined fillers, and divided fillers, or in the order of combined fillers, divided fillers, and divided screen plates. In this way, between two adjacent packing units, the downstream end face of the upstream split filler is opposite to the upstream end face of the downstream split screen plate, or between two adjacent packing units, the upstream split screen plate The downstream end face of is opposite to the upstream end face of the downstream merged packing.

For multiple packing units arranged in the same outer tube, the spacing between the divided screen plates, the combined packing, and the divided packing in each packing unit can be completely consistent or partially consistent or completely different. Similarly, the spacing between the opposing surfaces of two adjacent filler units can also take various forms such as all the same, part of the same, or completely different.

Generally, the inner diameter of the outer tube is controlled in the range of 2 mm to 100 mm, preferably in the range of 5 mm to 20 mm. The side walls of the divided sieve plate, the confluent packing, and the divided packing are in contact with the inner wall of the outer tube, and the contact surfaces are pressed together to ensure the formation of a fixed connection structure.

Regular or irregular holes or gaps are formed on the dividing screen plate, so that fluid can flow from one end surface of the dividing screen plate to the other end surface. Grooves are respectively formed on the two end surfaces of the merged filler, and a channel connecting the two grooves is formed between the bottom surfaces of the two grooves. The two end faces of the split filler are provided with grooves at least on the upstream end faces, and are provided with a plurality of channels extending to the edges of the two end faces respectively, and the number of channels can be Two, three, five or eight, the multiple channels are generally evenly distributed around the circumference.

In the following two cases, the downstream end surface of the split packing may not form a groove structure, that is, (1) between two adjacent packing units, the split packing in the upstream packing unit and the split sieve plate in the downstream packing unit There is a distance between the opposing surfaces; (2) In a packing unit, the opposing surfaces between the confluent filler and the dividing screen are spaced. In the foregoing two cases, if the formed spacing is relatively small, it is still recommended to form a groove structure on the downstream end surface of the split filler. When the downstream end surface of the segmented filler does not form a groove structure, the fluid enters the channel from the junction of the groove on the upstream end face and the channel port, and flows out to the spacing space at the junction between the edge of the downstream end face and the channel port. If the opposing surface between the divided filler and the divided screen plate in the aforementioned case (1) is in contact or there is only a gap formed by assembly, it is necessary to form a groove structure on the downstream end surface of the divided filler. If the opposing surfaces between the merged packing and the divided screen plate in the aforementioned case (2) are in contact or there is only a gap formed by assembly, it is also necessary to form a groove structure on the downstream end surface of the divided packing. In short, as a preferred solution, grooves are formed on both end faces of the split filler. At this time, the two ends of the channel provided on the split filler extend to the edges of the grooves formed on the two end faces. The slots are connected.

The equivalent diameter of the holes or gaps formed on the dividing sieve plate is much smaller than the equivalent diameters of the combined packing and the channels provided on the dividing packing. In other words, the channel width of the holes or gaps formed on the dividing screen is much smaller than the channel widths of the combined packing and the channels provided on the dividing packing.

In a specific embodiment, the thickness or axial dimension of the dividing screen can be set in the range of 0.1 mm to 50 mm, preferably in the range of 1 mm to 5 mm. The radial size (or equivalent diameter) of the holes or gaps formed on the dividing screen may be set in the range of 1 μm to 800 μm, preferably in the range of 10 μm to 200 μm. When the channel changes irregularly over the entire length of the hole or gap, when understanding the aforementioned equivalent diameter, its value is a range interval. For different holes or gaps on the same dividing sieve plate, the value interval may not be exactly the same, that is, phase Close; the value range of holes or gaps on the dividing screen set at different positions can be different.

The dividing sieve plate can be made of porous structure materials, such as sintered metal powder, sintered metal mesh, metal sponge foam, sintered ceramic powder, ceramic sponge foam, laser processed microporous plate, meltblown plastic mesh block, etc. In each packing unit, the divided screen, the convergent packing and the divided packing contained therein, and the opposite end faces of the two adjacent ones may be in contact or spaced apart. Between two adjacent packing units, between the upstream split filler and the opposite face of the downstream split screen, or between the upstream split screen and the opposite face of the downstream combined packing, it can be in contact Or spaced.

After the packing unit is placed in the outer tube, a converging cavity is formed between the inner wall of the outer tube and the converging filler and/or the dividing screen plate, where the liquid can flow downstream through the channel provided on the converging filler after converging; A reflective mixed flow cavity is formed between the inner wall of the outer tube, the convergent packing and the divided packing. After the liquid flows from the converged cavity into the reflective mixed flow cavity, it will flow radially toward the channel openings provided on the divided packing and flow downstream, during which the liquid will continue to flow. Under the action of the bottom surfaces of the two grooves of the reflective mixed flow cavity, the reflux is cyclically performed to obtain sufficient mixing; a distribution cavity is formed between the inner wall of the outer pipe, the divided filler and the divided sieve plate, and when the liquid flows into the distribution cavity from the reflective mixed flow cavity, It will continue to converge into the cavity in the radial direction, and finally make the liquid re-partition in the cavity on the end surface of the dividing screen, and then continue to flow downstream.

The outer diameter of the merged packing is the same as the inner diameter of the outer tube, the axial length of the merged packing is 2mm-20mm, preferably 5-10mm, and the diameter of the upper channel is 0.1mm-5mm, and it needs to be the same as the inner diameter of the outer pipe. The specific value is determined by matching, preferably 0.5-2mm.

The outer diameter of the split packing is also the same as the inner diameter of the outer tube, the axial length is 2mm-20mm, preferably 5-10mm, and the number of channels on it is at least 2. More channels need to match the inner diameter of the outer tube and can be designed 10 or even 100, or more, the shape of the channel can be semicircular or irregular in addition to the round hole shape. The axial direction of the through hole can be parallel to the axial direction of the outer tube or form a certain included angle. It plays a role in coarse segmentation.

In some embodiments, the bottom surface of the groove provided on the end surface of the merged filler is a curved surface.

In some embodiments, the bottom surface of the groove provided on the end surface of the split filler is an arc surface.

In some embodiments, one or both end surfaces of the dividing screen may also be provided with arcuate or spherical grooves, and may be one groove or multiple grooves distributed in the surface.

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

In some embodiments, the channel provided on the merged packing is a single hole, and the axis of the hole is at the axis of the merged packing.

In some embodiments, the channels provided on the confluence packing are multiple through holes, one of the through holes is located at the axis of the confluence packing, and the other through holes are distributed around the periphery of the confluence packing, or all the through holes are Set at the periphery of the axis of the confluent packing. Preferably, the axis of the through hole provided on the periphery of the axis of the merged packing is inclined relative to the axis of the merged packing, and the downstream end is close to the axis of the merged packing. When a channel with multiple through-hole structures is adopted, one end of each through-hole or one end of a part of the through-hole is formed with the nozzle.

In some embodiments, the channel provided on the split filler may be a groove specifically provided on the side wall or a through hole at the inner edge of the side wall. Preferably, the groove provided on the side wall of the divided filler is a sloping groove, that is, the extending direction of the groove is inclined with respect to the vertical line on the side wall. To the downstream, it is inclined in a direction close to the axis of the divided packing. Preferably, the groove provided on the side wall of the divided filler is a spiral groove.

Preferably, the through hole at the inner edge of the side wall of the split filler may have an axial extension direction that is consistent with the axial direction of the split filler, or it may be inclined from upstream to downstream toward the axis of the split filler. .

In some embodiments, the divided sieve plate, the combined packing and the divided packing in the packing unit are connected to one another by a plug-in structure. Or the split sieve plate, the convergent packing and the split packing in the packing unit are connected to each other by a ring body to form a whole, and preferably the ring body is set as a spiral ring, and the split sieve plate, the convergent packing and the split filler are connected to each other as a whole. The end of the side wall is equipped with external threads to match the spiral ring, so that it is convenient to adjust and control the spacing between the divided sieve plate, the merged filler, and the divided filler.

A continuous flow reactor, and its solution is: the continuous flow reactor contains the aforementioned continuous flow reaction module, that is, the continuous flow reactor may only contain one form of the aforementioned continuous flow reaction module It can also contain the above-mentioned continuous flow reaction modules in multiple forms at the same time.

A packing unit, the scheme is: the packing unit includes a divided screen plate, a combined filler and a divided filler, and is arranged in the order of the divided screen, the combined filler, and the divided filler, or the combined filler, the divided filler, and the divided screen. The order of the boards.

Regular or irregular holes or gaps are formed on the dividing screen plate, so that fluid can flow from one end surface of the dividing screen plate to the other end surface. Grooves are respectively formed on the two end surfaces of the merged filler, and a channel connecting the two grooves is formed between the bottom surfaces of the two grooves. A groove is formed on at least the upstream end surface of the two end surfaces of the split filler, and a plurality of channels extending to the edges of the two end surfaces respectively are provided at both ends, and the number of the plurality of channels can be It is two, three, four or six. The multiple channels are generally evenly distributed around the circumference, or they may not be evenly distributed.

The radial size of the holes or gaps formed on the dividing screen plate is smaller than the radial size of the combined packing and the channels provided on the dividing packing. In other words, the channel width of the holes or gaps formed on the dividing screen plate is smaller than the channel widths of the combined packing and the channels provided on the dividing packing.

In some specific embodiments, the thickness or axial dimension of the dividing screen can 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 4.2mm and so on.

In some specific embodiments, the channel width of the holes or slits formed on the dividing screen can 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 microns to 130 microns or 135 microns 180 microns. The dividing sieve plate can be made of porous structure materials, such as sintered metal powder, sintered metal mesh, metal sponge foam, sintered ceramic powder, ceramic sponge foam, laser processed microporous plate, meltblown plastic mesh block, etc. Because the holes or gaps on the dividing screen are sometimes formed naturally during the manufacturing process, the size of the radial dimension is not a fixed value, but is discrete, even if a connected hole or gap is at different sections of the radial dimension The size can be different. Moreover, even if the micropores formed by laser processing are used, the pore size of each micropore can be different, so the pore size of all micropores is a discrete value that covers an interval.

In the packing unit, the divided sieve plate, the convergent packing and the divided packing contained in the packing unit may be in contact with or spaced apart between the opposite end faces of the two adjacent ones.

In some embodiments, one or both of the end faces of the dividing screen may also be provided with curved grooves, and may be one groove or a plurality of grooves distributed in the plane.

In some embodiments, the downstream end of the channel provided on the merged filler extends to the outside of the bottom surface of the groove provided on the downstream end surface of the merged filler to form a nozzle, and the port of the nozzle extends to the end surface of the merged filler on the downstream side. The port of the groove provided in the groove or extending out of the groove provided on the end surface of the merged filler at the downstream.

In some embodiments, the channel provided on the merged packing is a through hole, and the axis of the through hole is at the axis of the merged packing. In other embodiments, the channels provided on the merged packing are multiple through holes, one of the through holes is located at the axis of the merged packing, and the other through holes are distributed on the periphery of the axis of the merged packing. , Or all the through holes are arranged on the periphery of the axis of the confluent packing. Preferably, the axis of the through hole provided on the periphery of the axis of the merged packing is inclined with respect to the axis of the merged packing, and the downstream end is close to the axis of the merged packing. When a channel with a structure of multiple through holes is adopted, one end of each through hole or one end of a part of the through hole is formed with the nozzle.

In some embodiments, the channel provided on the split filler may be a groove specifically provided on the side wall or a through hole at the inner edge of the side wall.

Preferably, the groove provided on the side wall of the divided filler is a sloping groove, that is, the extending direction of the groove is inclined with respect to the vertical line on the side wall. To the downstream, it is inclined in a direction close to the axis of the divided packing. Preferably, the groove provided on the side wall of the divided filler is a spiral groove.

The beneficial effects of the present invention are: in view of the impact (between fluid-fluid, fluid-channel wall), cutting, merging, turbulence, etc., when fluid flows in the microchannel, so as to promote the mixing of different substances in the fluid, Among them, the most effective function is the cutting-convergence function, which is a kind of forced mixing obtained by using the fluid's own momentum. The purpose of this patent is to provide a structure that can strengthen this function so that the fluid mixing and mass transfer efficiency are compared The macro-mixing has been strengthened thousands of times. Therefore, in general, the patented solution has the effect of strengthening the cutting-mixing effect of the fluid in the flow process, so that the fluid mixing and mass transfer efficiency is significantly enhanced, and the effect of fully mixing and high-efficiency mixing is realized.

Specifically, the sieve plate provided can cut the fluid to the micrometer level, while the ordinary microreactor is only on the millimeter level. Three-dimensional mixing is achieved in three-dimensional space, while ordinary microreactors only achieve two-dimensional mixing in planar space. The module adopts a tubular structure. Compared with the ordinary plate structure, the integral channel formed has a better pressure resistance. Theoretically, it can reach the pressure resistance level of 100 MPa, while the general microreactor can only reach 5 MPa. Up and down, so this patent can greatly improve the safety of the reactor. The pipe end of the module is convenient to seal, which is easy to disassemble and clean. A modular structure is formed, which facilitates the formation of standard parts, facilitates manufacturing, assembly, mass production, and reduces costs.

Description of the drawings

Fig. 1 is a schematic cross-sectional structure diagram of a certain embodiment of a microchannel reaction module.

Figure 2.1 is a structural schematic diagram of the state of the packing unit.

Figure 2.2 is a schematic diagram of the state two structure of the packing unit.

Figure 2.3 is a schematic diagram of the structure of the coarsely divided packing, 2.31 is a top view, and 2.32 is a bottom view.

Figure 2.4 is a schematic diagram of the structure of the confluent packing, 2.41 is a top view, and 2.42 is a bottom view.

Figure 3.1 is a schematic diagram of the state three structure of the packing unit.

Figure 3.2 is a schematic top view of the confluent filler in the embodiment shown in Figure 3.1.

Figure 3.3 is a schematic top view of the coarsely divided filler in the embodiment shown in Figure 3.1.

Figure 4 is a schematic top view of a certain embodiment of the coarsely divided filler.

Figure 5 is a schematic front view of a certain embodiment of the coarsely divided filler.

Fig. 6 is a schematic diagram of a three-dimensional structure of a certain embodiment of the coarsely divided filler.

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

Figure 7.2 is a schematic diagram of the confluent packing in the embodiment shown in Figure 7.1, 7.21 is a top view, and 7.22 is a bottom view.

Figure 7.3 is a schematic diagram of the top view structure of the coarsely divided filler in the embodiment shown in Figure 7.1.

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

Figure 9 is a schematic diagram of a cross-sectional structure of an embodiment of the confluent filler.

FIG. 10 is a schematic cross-sectional structure diagram of another embodiment of the microchannel reaction module.

In the picture: 10 outer tubes, 20 packing units; 1 split sieve plate, 2 combined packing, 21 channel one, 22 groove one, 23 groove two, 24 flange, 25 slot, 3 divided packing, 31 channel two, 32 grooves three, 33 grooves four, 34 inserts, 4 confluence cavities, 5 reflection mixing cavities, 6 distribution cavities, 7 rings, 8 nozzles.

Detailed ways

The structure, ratio, size, etc. shown in the drawings of the specification are only used to match the content disclosed in the specification for the understanding and reading of those who are familiar with the technology. They are not used to limit the implementation conditions of the present invention, so they do not have The technical significance, any structural modification, proportional relationship change or size adjustment, shall still fall within the technical content disclosed in the present invention without affecting the effects and objectives that can be achieved by the present invention. Within the range that can be covered. At the same time, terms such as "upper", "lower", "front", "rear", "middle" and other terms cited in this specification are only for ease of description and are not used to limit the scope of the present invention. , The change or adjustment of the relative relationship shall be regarded as the scope of the implementation of the present invention without substantial changes to the technical content.

First of all, this patent also relates to a continuous flow reaction module.

A continuous flow reaction module as shown in FIGS. 1 and 10 includes an outer tube 10 and a plurality of packing units 20 arranged in the outer tube 10. The multiple packing units 20 are sequentially arranged in the outer tube 10. When the entire outer pipe is a straight pipe, the multiple packing units are arranged in sequence along the axial line of the pipe. When the outer tube is a U-shaped tube, the multiple packing units are arranged in sequence along the U-shaped bend line. The end of the outer tube may be provided with a connecting structure, such as an external thread and/or an internal thread. The end of the outer tube can be provided with a sealing end cover or one end can be directly provided as an integral sealing structure with the tube.

Each packing unit 20 includes dividing screen 1, combined packing 2 and divided packing 3, and is arranged in the order of dividing screen 1, combined packing 2, and divided packing 3 (see Figure 2.1, Figure 2.2, Figure 7.1 and Figure 8), or arranged in the order of combined packing 2, split packing 3, and split sieve plate 1 (see Figure 3.1). In this way, between two adjacent packing units 20, the downstream end face of the upstream split packing 3 is opposite to the upstream end face of the downstream split screen 1; or, between two adjacent packing units 20, the upstream split screen The downstream end surface of 1 is opposed to the upstream end surface of the merged packing 2 located downstream.

Regular or irregular holes or gaps are formed on the dividing screen plate 1 so that fluid can flow from one end surface of the dividing screen plate 1 to the other end surface (that is, from the end surface on the upstream side to the end surface on the downstream side).

A groove one 22 and a groove two 23 are respectively formed on the two end surfaces of the merged packing 2, and a channel 21 connecting the two grooves is formed between the bottom surfaces of the groove one 22 and the groove two 23. As shown in the scheme shown in Figure 1 to Figure 2.4, the channel 21 provided on the confluence packing 2 is a through hole, and the axis of the through hole is at the axis of the confluence packing 2 (it can be overlapped or not). See the scheme shown in Figure 3.1 to 3.2. The channel 21 provided on the confluence packing 2 is a plurality of through holes. The axis of one through hole is at the axis of the confluence packing 2, and the other through holes are distributed on the axis of the confluence packing 2. Periphery of the heart. Or in other embodiments, all the through holes are arranged on the periphery of the axis of the confluent packing. Preferably, the axis of the through hole provided on the periphery of the axis of the merged packing is inclined relative to the axis of the merged packing, and the downstream end of the through hole axis is close to the axis of the merged packing.

As shown in Figures 1 to 2.2 and Figure 10, the bottom surface of the groove one 22 and the bottom surface of the groove two 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 with an outer center, or a continuous arc surface formed by a plurality of arc surfaces with multiple outer centers and/or inner centers (as shown in the figure, 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 shape of groove one and the arc shape of groove two of the confluent filler contained in different packing units may also be different from each other or may be partially the same. The difference between the first groove and the second groove is mainly reflected in the depth of the groove and the size of the notch, and the notch is preferably a flared form that opens outward.

In order to more effectively spray the fluids together, as shown in the embodiment shown in Figs. 8 to 10, the downstream end of the channel 21 provided on the confluent packing 2 extends to a recess provided on the end face downstream of the confluence packing 2. The nozzle 8 is formed outside the bottom surface of the groove. In other words, the downstream end of the channel one 21 provided on the merged packing 2 extends beyond the bottom surface of the groove two 23 provided on the merged packing 2 to form the nozzle 8. The port of the nozzle extends into the second groove 23 (as shown in FIGS. 8 and 10) or extends out of the port of the second groove 23 (as shown in FIG. 9). When the channel 21 with a structure of multiple through holes is adopted, it may be required that one end of each through hole or one end of a part of the through hole is formed with the nozzle. The free end port of the nozzle can be cone-shaped (large end facing outward or inward).

A groove three 32 and a groove four 33 are respectively formed on the two ends of the split filler 3, and a plurality of two channels 31 are also provided on the split filler 3, and the two ends of each channel 31 respectively correspond to the concave grooves. The notch edge of the groove three 32 and the notch edge of the groove four 33. The groove three 32 and the groove four 33 are connected by the channel two 31, that is, a communication relationship is established between the two end faces of the split filler 3, so that the fluid can flow from one end face to the other end face.

The bottom surface of the groove three 32 and the bottom surface of the groove four 33 provided on the end surface of the split filler 3 are both arc surfaces (including spherical surfaces). Similarly, the arc here can be an arc with an outer center, or a continuous arc composed of multiple arcs with multiple outer centers and/or inner centers (as shown in the figure, all belong to this category) . The arc shape of the groove three 32 is different from the arc shape of the groove four 33, but it is not ruled out that they can be the same. The arc shape of groove three and the arc shape of groove four of the divided filler contained in different packing units may also be different from each other or may be partially the same. As shown in the figure, the depth of groove three is significantly greater than that of groove four. The difference between groove three and groove four can also be reflected in the size of the notch, and the two notches are also preferably in the form of flared openings.

As shown in Figure 1 to Figure 2.4 and Figure 5 to Figure 7.3, the second channel 31 provided on the split filler 3 is specifically a groove provided on the side wall thereof. At this time, the groove on the side wall where the split filler 3 is provided can be a straight groove along its measuring line, or a slanted groove with respect to the measuring line, that is, the extending direction of the groove is relative to the (axial) ) The vertical line is inclined (as shown in Figure 5). Furthermore, the bottom surface of the groove is inclined, and it is inclined from upstream to downstream in a direction close to the axis of the split filler, as shown in FIG. 5. Preferably, the groove provided on the side wall of the split filler is a spiral groove (see Figure 6). The grooves constituting the channel two 31 are set in the form of oblique grooves or spiral grooves, so that when multiple fluids converge, they can form reflective impacts in the cavity or converge in the cavity in a rotating state to form a turbulent mixed flow. Collision is generated to strengthen the convergence, so that the different components in the fluid are divided and then collide and converge from the center to re-change the distribution of the components in the fluid, which can further ensure that the fluid is fully and efficiently mixed.

As shown in Figs. 3.1 to 4 and Figs. 8 to 10, the second channel 31 provided on the split filler 3 is specifically arranged in the through hole at the inner edge of the side wall. Preferably, the through hole at the inner edge of the side wall of the segmented filler may have an axial extension direction consistent with the axial direction of the segmented filler (as shown in the figure), or along the direction from upstream to downstream toward the segment The direction of the packing axis is inclined (the same is to cause multiple streams of fluid to form a reflective impact).

The equivalent diameter of the holes or gaps formed on the dividing sieve plate is smaller than the equivalent diameters of the combined packing and the channels one 21 and the channel two 31 provided on the dividing packing.

In other embodiments, one or both of the end faces of the dividing screen may also be provided with arcuate or spherical grooves, and may be one groove or multiple grooves distributed in the surface.

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

The confluence packing 2 is processed by two bowl-shaped groove bottoms on the upper and lower end surfaces to form a circular hole 21. The outer diameter of the confluence packing 2 is the same as the inner diameter of the outer tube 10, and the height (axial direction) of the confluence packing 2 The length) is 2mm-20mm, preferably 5-10mm, and the diameter of the channel 21 is 0.1mm-5mm, which matches the inner diameter of the corresponding outer tube, preferably 0.5-2mm.

The split filler 3 is composed of bowl-shaped depressions on the upper and lower end surfaces and two channels 31 at the outer edges. The two channels 31 contain 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 5-10mm. The number of circular holes (ie, coarsely divided channels) constituting the second channel 31 is at least 2. More channels need to match the inner diameter of the

outer tube

10, and 10 or even 100 or more can be designed. In addition to the round hole shape, the shape can also be semicircular or irregular. The axial direction of the through hole can be parallel to the axial direction of the outer tube or form a certain included angle, in order to achieve a coarse division effect.

In some specific embodiments, the dividing sieve may be made of porous structure materials, such as sintered metal powder, sintered metal mesh, metal sponge foam, sintered ceramic powder, ceramic sponge foam, laser processed microporous plate, melting Spray plastic net blocks and so on. The thickness (axial length) of the dividing screen can be set in the range of 0.1 mm to 50 mm, preferably in the range of 1 mm to 5 mm. The radial size (or channel width) of the holes or gaps formed on the dividing screen may be set in the range of 1 μm to 800 μm, preferably in the range of 10 μm to 200 μm.

In each packing unit, the divided sieve, confluent packing, and divided packing contained in it may be in contact or spaced between the opposite end faces of the two adjacent ones, as shown in Figure 1 to Figure 2.2. Between two adjacent packing units, between the upstream split filler and the opposite face of the downstream split screen, or between the upstream split screen and the opposite face of the combined filler downstream, it can be Contact or space, see Figure 1, Figure 10. The space L1, L2... etc. can be the same or partly different.

After the packing unit 20 is placed in the outer tube 10, the side walls of the dividing screen 1, the merged packing 2, and the divided packing 3 are all in contact with the inner wall of the outer tube 10. Assembling, the hot assembly process is mostly used to make the sidewalls of the split screen 1, the converging packing 2, the split packing 3 and the inner wall of the outer tube are pressed together to ensure that the split screen 1, the confluence packing 2, and the split packing are in use. 3 Will not move relatively in the lumen. Of course, if the outer pipe has a structure where two half pipes are buckled together, the dividing sieve plate 1, the merged packing 2, and the divided packing 3 can also be arranged correspondingly outside the outer pipe so that the dividing sieve plate 1, The side walls of the merged packing 2 and the divided packing 3 are pressed together with the inner wall of the outer tube. The outer tube referred to can be understood as a plurality of unit tubes connected together by a threaded structure or a plug-in structure. At this time, the opposite ends of the two unit tubes that are connected should meet the requirements of the packing unit in the entire outer tube. Layout law. The outer tube is set in a unit form, which can be easily assembled, and it is convenient to put the divided screen 1, the merged packing 2, and the divided packing 3 into the tube, and it is convenient to grasp the axial distance between two adjacent packing units during operation.

A confluence chamber 4 is formed between the inner wall of the outer tube 10 and the confluent packing 2 and/or the dividing sieve plate 1, where the fluid (or liquid) can flow downstream through the channel 21 provided on the confluence packing 2 after converging here. The inner wall of the outer tube 10 and the confluence filler 2 and the split filler 3 form a reflective mixed flow cavity 5. After the liquid flows from the converged cavity 4 into the reflective mixed flow cavity 5, it will radially toward the channel two provided on the split filler 3 The 31 port flow is roughly divided into multiple strands and then flows downstream. During this period, the liquid will continue to be reflected by the bottom surface of the two grooves (groove two 23 and groove three 32) of the reflective mixed flow cavity 5, and return cyclically. Flow, and form mixed turbulence, and get fully mixed (reflection and backflow intensity will be affected by the specific state of the fluid ejected from the channel 1, for example, after the nozzle structure is set up, the intensity of this reflection and backflow will be more intense. The effect will be better); a distribution cavity 6 is formed between the inner wall of the outer tube 10, the dividing filler 3 and the dividing sieve plate 1. When the liquid flows into the distribution cavity 6 from the reflective mixed flow cavity 5, it will continue to flow radially into the cavity Convergence, finally causes the liquid to be re-divided in the cavity on the end face of the dividing sieve plate 1, and then cut into small strands again and continue to flow downstream, flow to the downstream confluence cavity 4, and circulate in turn.

In the embodiment shown in FIG. 1 and FIG. 10, the packing unit 20 is arranged in the order of the divided screen plate 1, the combined packing 2, and the divided packing 3. Therefore, when flowing in from the inlet end of the outer tube 10, the fluid first passes through the holes or gaps on the dividing screen 1 and is forcibly sheared into small multiple strands before flowing to the confluence cavity 4. Then the fluid enters the reflective mixed flow cavity 5 from the confluence cavity 4 through the channel one 21, and collides with the reflective wall formed by the bottom wall of the groove two 23 and the groove three 32, and is bounced by the reflective wall and mixed with the upper fluid prosperous impact. The ground is roughly divided into n fluids by channel two 31. After the n fluids flow into the distribution cavity, they are evenly distributed on the end surface of the dividing sieve plate 1, enter the gaps in the dividing sieve plate, and are further divided into micron-level poles. Multi-path fluids, these small fluids enter the downstream confluence chamber 4 again through the dividing screen, where they converge and mix in the cavity, and enter the reflective mixing chamber 5 of the downstream stage through the channel of the downstream stage. Line to achieve efficient mixing and mass transfer. After the nozzle 8 is formed at the downstream port of the channel 21, the reflection frequency and impact intensity in the reflection mixing cavity 5 can be strengthened, and the reflection mixing effect can be further improved.

As shown in Figure 7.1 to Figure 8, the split screen 1, the combined filler 2 and the split filler 3 in the packing unit 20 are connected to each other as a whole through a plug-in structure (see Figure 7.1 to Figure 7.3), or In the packing sheet, the split sieve plate 1, the merged packing 2 and the split packing 3 in the packing sheet 20 are connected to each other as a whole through the ring body 7, and preferably the ring body 7 is set as a spiral ring, and the split sieve plate 1 , The end of the side wall of the merged packing 2 and the split packing 3 are equipped with external threads to match the screw ring. This arrangement is convenient to adjust and control the spacing between the split sieve plate 1, the merged packing 2, and the split packing 3 (see Figure 8. Figure 10).

In addition, it should be noted that for multiple packing units 20 arranged in the same outer tube 10, the spacing between the divided screen 1, the combined packing 2, and the divided packing 3 in each packing unit 20 can be completely Consistent or partially consistent or completely different. Moreover, the spacing between the opposing faces of the two adjacent filler units 20 (such as L1, L2.. in the figure) can also be the same or partly the same or completely different.

Secondly, this patent also relates to a continuous flow reactor, in which the involved continuous flow reaction module is applied. That is, the continuous flow reactor includes the continuous flow reaction module mentioned above. The continuous flow reactor may contain only one type of continuous flow reaction module mentioned above, or it may contain multiple types of continuous flow reaction modules mentioned above at the same time. The continuous flow reactor also includes a heat exchange fixture or a heat exchange shell placed on the periphery of the outer tube 10.

Finally, this patent also relates to a packing unit, which is an important part of the continuous flow reaction module involved.

A packing unit as shown in Figure 2.1 to Figure 9, including split sieve plate 1, combined packing 2 and divided packing 3, and arranged in the order of dividing sieve plate 1, combined packing 2, and divided packing 3, or in sequence The order of converging packing 2, dividing packing 3, and dividing sieve plate 1 (see Figure 3.1).

The dividing sieve plate 1 can be made of porous structure materials, such as sintered metal powder, sintered metal mesh, metal sponge foam, sintered ceramic powder, ceramic sponge foam, laser processed microporous plate, meltblown plastic mesh block, etc. Therefore, regular or irregular holes or gaps can be formed on the dividing screen plate, and the purpose is to ensure that the fluid can flow from one end surface of the dividing screen plate to the other end surface through the holes or gaps in the body.

The thickness of the dividing sieve plate 1 can be set in the range of 0.1 mm to 50 mm, preferably in the range of 1 mm to 5 mm, such as 1.1 mm or 2.3 mm or 2.6 mm or 4.2 mm. The radial size (or channel width) of the holes or gaps formed on the dividing sieve plate 1 can 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 or 60 μm or 105 microns or 130 microns or 180 microns. Because the holes or gaps on the dividing screen are sometimes formed naturally during the manufacturing process, the size of the radial dimension is not a fixed value, but is discrete, even if a connected hole or gap is at different sections of the radial dimension The size can be different. Moreover, even if the micropores formed by laser processing are used, the pore size of each micropore can be different, so the pore size of all micropores is a discrete value that covers an interval. For the understanding of a specific value given above, it can be considered that it represents an average value or a central value (the specific value fluctuates up and down relative to the central value).

A groove one 22 and a groove two 23 are respectively formed on the two end surfaces of the merged packing 2, and a channel 21 connecting the two grooves is formed between the bottom surfaces of the groove one 22 and the groove two 23. The channel 21 can be a cylindrical hole, a prismatic hole, a semi-cylindrical hole or a special-shaped hole. The height (axial length) of the confluent filler 2 is 2mm-20mm, preferably 5-10mm, and the diameter of the channel 21 is 0.1mm-5mm, preferably 0.5-2mm. If the diameter of the hole in this section is a non-circular hole, it should be understood according to the equivalent diameter.

A groove three 32 and a groove four 33 are respectively formed on the two ends of the split filler 3, and at the same time, there are two ends respectively extending to the notches of the two grooves and connecting the two grooves. A plurality of channels two 31, in other words, on the split packing 3, a plurality of channels two 31 connecting groove three 32 and groove four 33 are provided, and the two end ports of each channel two 31 correspondingly extend to groove three 32 at the edge of the notch and groove 29 at the edge of the notch 33. The height (axial length) of the split filler 3 is 2mm-20mm, preferably 5-10mm. The number of circular holes (ie, coarsely divided channels) constituting the second channel 31 is at least two, and more channels can be designed with 10, or even 100, or more under the necessary external structure size. In addition to the cylindrical hole, the cavity shape of the channel two 31 can also be a semi-cylindrical or prismatic hole or an irregular hole or groove.

In the language environment of this patent, the diameter of pores, gaps, cavities, channels, etc., if they are non-circular holes, they are all understood in terms of equivalent diameters. It can be seen that the equivalent diameter of the holes or gaps formed on the dividing sieve plate 1 is much smaller than the equivalent diameters of the combined packing and the channels provided on the dividing packing.

As shown in Figure 1 to Figure 2.2 and Figure 7.1 to Figure 10, in the packing unit 20, between the divided screen 1, the combined packing 2 and the divided packing 3, and between the opposite end faces of the two adjacent ones It can be in contact (including gaps due to assembly) or spaced.

The groove bottom surfaces of the groove one 22 and the groove two 23 provided on the end surface of the merged packing 2 are both arc surfaces (including spherical surfaces). The groove bottom surfaces of the groove three 32 and the groove four 33 provided on the end surface of the split filler 3 are arc surfaces (including spherical surfaces). The arc here can be an arc with an outer center, or a continuous arc composed of multiple arcs with multiple outer centers and/or inner centers (as shown in Figs. 1 to 10) Such). 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 shape of the groove three 32 and the arc shape of the groove four 33 may be the same or different. The arc shape of groove one and the arc shape of groove two of the confluent filler contained in different packing units may also be different from each other or may be partially the same. The difference between the first groove and the second groove is mainly reflected in the depth of the groove and the size of the notch, and the notch is preferably a flared form that opens outward. The arc shape of groove three and the arc shape of groove four of the divided filler contained in different packing units may also be different from each other or may be partially the same. The difference between groove three and groove four is mainly reflected in the depth of the groove and the size of the groove, and the groove is preferably a flared form that opens outward. As shown in Figure 2.1 to Figure 2.3, the groove depth of groove three 32 is obviously greater than that of groove four 33, and the notch of groove three 32 is smaller than that of groove 334.

One or two end surfaces of the dividing screen plate can also be set with arcuate or spherical grooves, and can be one groove or multiple grooves distributed in the surface.

As shown in Figures 8 to 10, the downstream end of the channel 21 provided on the combined packing 2 extends to the outside of the bottom surface of the groove provided on the end face downstream of the combined packing 2 to form a nozzle 8. In other words, on the combined packing 2. The downstream end of the channel one 21 extends to the outside of the bottom surface of the groove two 23 on the confluence packing 2 to form a nozzle 8. The port of the nozzle extends into the second groove 23 (as shown in FIGS. 8 and 10) or extends out of the port of the second groove 23 (as shown in FIG. 9). When the channel 21 with a structure of multiple through holes is adopted, it may be required that one end of each through hole or one end of a part of the through hole is formed with a nozzle. The free end port of the nozzle can be cone-shaped (large end facing outward or inward). The structure of the nozzle 8 extending outward is provided to more effectively converge and eject the fluid. The good fluid enters the downstream cavity to form a reflection and mixed flow state, so as to better achieve the purpose of being uniformly mixed again.

In some embodiments, the cavity of the channel 21 can be designed according to the principle of the Venturi tube.

As shown in Figure 1 to Figure 2.4, the channel 21 provided on the combined packing 2 is a single hole, and the axis of the hole is at the axis of the combined packing.

As shown in Figure 3.1 to Figure 3.2, the channel 21 provided on the confluence packing 2 is a plurality of circular holes, the axis of one of the circular holes is at the axis of the confluence packing 2, and the other circular holes are distributed and arranged on the periphery of the axis of the confluence packing. In other embodiments, all the circular holes can also be arranged on the periphery of the axis of the confluent packing, distributed around the circle or distributed in a cross shape or an X shape, and other forms. Preferably, the axis of the circular hole provided on the periphery of the axis of the merged packing is inclined relative to the axis of the merged packing, and the downstream end is close to the axis of the merged packing. When it is a channel 21 with a plurality of circular holes, one end of each circular hole or one end of a partial circular hole is formed with the nozzle 8 described above.

As shown in Figs. 1 to 2.4 and Figs. 5 and 6, the second channel 31 provided on the split packing 3 is specifically a plurality of grooves provided on the side wall thereof. Here, the groove provided on the side wall of the split filler may be a slanted groove, that is, the extending direction of the groove is inclined with respect to the (axial) vertical line on the side wall, or more preferably, the bottom surface of the groove is The inclined surface is inclined from upstream to downstream in a direction close to the axis of the divided packing (as shown in Figure 6). In other embodiments, the grooves provided on the sidewalls of the split filler may also be spiral grooves (as shown in FIG. 5). Setting the grooves that constitute the channel two 31 into a chute or spiral groove can make multiple fluids converge to form a reflection collision or converge in a rotating state, forming a turbulent mixed flow, and different particles in the fluid can collide and strengthen the confluence. The function enables the different components in the fluid to be split and then collide and converge, which re-changes the distribution of each component in the fluid, and can further ensure that the fluid is fully and efficiently mixed.

As shown in Figure 3.1 to Figure 4 and Figure 8 and Figure 10, the second channel 31 provided on the split filler 3 is specifically a plurality of through holes provided at the inner edge of the side wall. Here, each through hole at the inner edge of the side wall of the split filler may have its axis extending in the same direction as the axis of the split filler (as shown in the figure), or along the direction from upstream to downstream toward the partition closer to the partition. The direction of the packing axis is inclined (the same is to cause multiple streams of fluid to form a reflective impact).

As shown in Figure 7.1 to Figure 7.3, the divided screen 1, the combined packing 2 and the divided packing 3 in the packing unit 20 are connected to each other as a whole through a plug-in structure. An annular flange 24 is provided at the edge of the upstream end surface of the combined packing 2, and the downstream end of the dividing screen 1 is inserted into the flange 24, so that the dividing screen 1 and the combined packing 2 are plug-connected and connected as a whole . A plurality of arc-shaped slots 25 are provided at the edge of the downstream end face of the converging filler 2, and the upstream end face of the split filler 3 is formed with inserts 34 corresponding to the slots 25, so that the confluence The packing 2 and the split packing 3 are plug-connected and connected as a whole.

8 and 10, the split screen 1, the combined packing 2 and the split packing 3 in the packing unit 20 are connected to each other by a ring body 7 to form a whole, and the ring body 7 is preferably set as a screw. Rings are equipped with external threads on the sidewall ends of the dividing screen 1, the converging packing 2 and the dividing packing 3 to match the screw ring. This arrangement is convenient for adjusting and controlling the spacing between the dividing screen, the confluence packing and the dividing packing.

The foregoing embodiments are only illustrative of the principles and effects, and are not used to limit the present invention. There are many aspects of the present invention that can be improved without departing from the general idea. Those familiar with the technology can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed in the present invention should still be covered by the claims of the present invention.

Claims

A continuous flow reaction module, which is characterized in that it includes an outer tube and a plurality of packing units sequentially arranged in the outer tube;

The said packing units include divided screens, combined packings and divided packings, and are arranged in the order of dividing screens, combined packings, and divided packings, or arranged in the order of combined packings, divided packings, and divided screens;

Regular or irregular holes or gaps are formed on the dividing sieve plate so that fluid can flow from one end surface of the dividing sieve plate to the other end surface; grooves are respectively formed on both end surfaces of the combined packing, and the two A channel connecting the two grooves is formed between the bottom surfaces of the grooves; a groove is formed on at least the upstream end surface of the two end surfaces of the split filler, and the two ends respectively extend to the edges of the two end surfaces. A plurality of channels connected at both ends; the equivalent diameter of the holes or gaps formed on the dividing screen plate is smaller than the equivalent diameter of the combined packing and the channels provided on the dividing packing.
The continuous flow reaction module according to claim 1, characterized in that at least one of the bottom surface of the groove provided on the end surface of the convergent filler and the bottom surface of the groove provided on the end surface of the split filler is arcuate.
The continuous flow reaction module according to claim 2, characterized in that the downstream end of the channel provided on the merged filler extends to the outside of the bottom surface of the groove provided on the downstream end surface of the merged filler and forms a nozzle.
The continuous flow reaction module according to claim 2, characterized in that: the dividing screen, the converging packing and the dividing packing in the packing unit are connected as a whole through a plug-in structure.
The continuous flow reaction module according to claim 2, characterized in that: the divided sieve plate, the convergent packing and the divided packing in the packing unit are connected to each other through a ring body to form a whole.
The continuous flow reaction module according to claim 5, characterized in that: the ring body is a spiral ring, and external threads are provided at the end of the divided screen, the merged packing and the side wall of the divided packing to match the spiral ring.
The continuous flow reaction module according to claim 2, characterized in that the channels provided on the split filler are grooves provided on the side walls, or through holes at the inner edges of the side walls.
The continuous flow reaction module according to claim 7, characterized in that the grooves provided on the side walls of the divided packing are chute grooves or spiral grooves.
The continuous flow reaction module according to claim 7, characterized in that: the through hole at the inner edge of the side wall of the divided packing has an axis extending in the same direction as the axial direction of the divided packing; or, from upstream to downstream toward the axis of the divided packing The direction of the heart is tilted.
The continuous flow reaction module according to claim 1, characterized in that: the downstream end of the channel provided on the merged packing extends to the outside of the bottom surface of the groove provided on the downstream end surface of the merged packing and forms a nozzle.
The continuous flow reaction module according to claim 1, characterized in that: the dividing screen, the converging packing and the dividing packing in the packing unit are connected as a whole through a plug-in structure.
The continuous flow reaction module according to claim 1, characterized in that: the divided sieve plate, the convergent packing and the divided packing in the packing unit are connected to each other through a ring body to form a whole.
The continuous flow reaction module according to claim 12, characterized in that: the ring body is a spiral ring, and external threads are provided at the end of the divided screen, the convergent packing and the side wall of the divided packing to match the spiral ring.
The continuous flow reaction module according to claim 1, characterized in that the channels provided on the split filler are grooves provided on the side walls, or through holes at the inner edges of the side walls.
The continuous flow reaction module according to claim 14, characterized in that the grooves provided on the sidewalls of the divided fillers are oblique grooves or spiral grooves.
The continuous flow reaction module according to claim 14, characterized in that: the through hole at the inner edge of the side wall of the divided filler has an axial extension direction consistent with the axial direction of the divided filler, or at least partly extends from upstream to The downstream is inclined in a direction close to the axis of the divided packing.
A continuous flow reactor, characterized in that it contains at least one type of continuous flow reaction module in claims 1 to 16.
A packing unit, characterized in that it includes divided screen plates, combined fillers and divided fillers, and is arranged in the order of divided screen plates, combined fillers, and divided fillers, or arranged in the order of combined filler, divided filler, and divided screen plates The dividing screen is formed with regular or irregular holes or gaps, so that fluid can flow from one end of the dividing screen to the other end; grooves are formed on both ends of the combined packing, and the two A channel connecting the two grooves is formed between the bottom surfaces of the two grooves; grooves are formed on at least the upstream end surface of the two end surfaces of the split filler, and the two ends respectively extend to the edges of the two end surfaces. A plurality of channels that can connect the two end faces; the equivalent diameter of the holes or gaps formed on the dividing screen plate is smaller than the equivalent diameter of each channel provided on the combined packing and the dividing packing.
The packing unit according to claim 18, characterized in that the channel width of the holes or slits formed on the dividing screen is set in the range of 1 μm to 800 μm.
The packing unit according to claim 18, characterized in that the downstream end of the channel provided on the merged packing extends to the outside of the bottom surface of the groove provided on the downstream end surface of the merged packing and forms a nozzle.
The packing unit according to claim 20, characterized in that the bottom surface of the groove provided on the end surface of the combined packing is a curved surface.
The packing unit according to claim 21, characterized in that the bottom surface of the groove provided on the end surface of the split packing is an arc surface.
The packing unit according to claim 20, characterized in that the bottom surface of the groove provided on the end surface of the split packing is a curved surface.
The packing unit according to claim 18, characterized in that: the divided screen plate, the combined packing and the divided packing in the packing unit are connected to one another through a plug-in structure.
The packing unit according to claim 18, characterized in that: the divided screen plates, the combined packing and the divided packing in the packing unit are connected to each other by a ring body into a whole; the ring body is set as a spiral ring, and the divided screen plates, The ends of the side walls of the merged packing and the divided packing are provided with external threads to match the spiral ring.
The packing unit according to claim 18, characterized in that: the bottom surface of the groove provided on the end face of the combined packing is a curved surface.
The packing unit according to claim 26, characterized in that the bottom surface of the groove provided on the end surface of the split packing is a curved surface.
The packing unit according to claim 18, characterized in that the bottom surface of the groove provided on the end surface of the split packing is a curved surface.
The packing unit according to claim 18, characterized in that the channel provided on the split packing is a groove provided on the side wall or a through hole at the inner edge of the side wall.
The packing unit according to claim 29, characterized in that the groove provided on the side wall of the divided packing is a chute groove or a spiral groove.
The packing unit according to claim 29, characterized in that: the through hole at the inner edge of the side wall of the divided packing has an axial extension direction consistent with the axial direction of the divided packing, or at least partly approaching from upstream to downstream The direction of the axis of the split filler is inclined.