CN112138622A

CN112138622A - Packing assembly and pipeline type reactor comprising same

Info

Publication number: CN112138622A
Application number: CN201910565891.8A
Authority: CN
Inventors: 杨卫东
Original assignee: Tianjin Lianli Chemical Co ltd
Current assignee: Tianjin Lianli Chemical Co ltd
Priority date: 2019-06-27
Filing date: 2019-06-27
Publication date: 2020-12-29

Abstract

The present invention provides a packing assembly and a pipe-type reactor including the same, comprising: the first filling unit is provided with a first discharge hole, so that the materials flow out through the first discharge hole; and the second packing unit is arranged on the first discharge port side of the first packing unit and is provided with a second blocking part and a second discharge port, and the position of the second blocking part is arranged corresponding to the first discharge port, so that the material flowing through the first discharge port is blocked by the second blocking part, flows through the second discharge port and flows into the next layer when a plurality of packing assemblies are stacked.

Description

Packing assembly and pipeline type reactor comprising same

Technical Field

The application relates to a reactor suitable for the technical field of chemical engineering and medical machinery, in particular to a pipeline type reactor, which is particularly suitable for chemical production involving high-temperature and high-pressure, inflammable and explosive substances and requiring high-temperature and high-pressure production technology.

Background

For the chemical production which relates to high-temperature and high-pressure, inflammable and explosive substances and needs high-temperature and high-pressure in the production process, the pipeline reactor has the characteristics of large heat transfer area, high pressure resistance, simple structure, convenient processing, continuous operation, high production capacity, easy realization of automatic control and labor saving, and has good mass transfer effect when operated in a turbulent flow state, so that the pipeline reactor has the advantages of a kettle reactor during strong exothermic reaction and high-pressure reaction, and is suitable for gas-phase and homogeneous liquid-phase reaction, gas-liquid-phase reaction and liquid-solid and gas-liquid-solid reaction in the presence of suspended solids or catalysts.

In particular, the pipe-type reactor has a common advantage of a general continuous operation apparatus in that the concentration and temperature conditions of the reaction are changed only in the direction of the length of the pipe, and are not changed with time, thereby being easily automatically controlled. As the continuous operation does not occupy the non-production time of feeding, discharging, cleaning and the like, the equipment utilization rate is high, the back mixing of the pipeline reactor with good design can be basically eliminated, and higher conversion rate can be achieved. The pipeline reactor is particularly suitable for high-pressure reaction and reaction systems with gas as a mixture; and the large surface area per unit volume of the pipe reactor is suitable for a strong endothermic reaction and a reaction which needs to be performed at a high temperature. The pipeline reactors used in production mostly adopt parallel feeding operation. However, if the continuous pipeline reactor is not used for reinforcement, the reaction speed is very slow by increasing the mixing degree of the two radial liquid phases and increasing the mass transfer area between the two liquid phases, so that the mass transfer process must be reinforced if the continuous pipeline reactor is used. However, mechanical agitation and static mixing are the methods commonly used in reactor design.

However, for the chemical reaction requiring long-time stirring contact in the tank reactor and the chemical reaction involving solids, the pipeline reactor cannot achieve a better mixing effect, and a reactor having a better stirring effect and suitable for the chemical reaction of high-temperature and high-pressure hazardous substances is required.

Disclosure of Invention

One aspect of the invention relates to a reactor. One or more embodiments of the present invention overcome one or more of the above-described deficiencies.

The present invention provides a packing assembly comprising: the first filling unit is provided with a first discharge hole, so that the materials flow out through the first discharge hole; and the second packing unit is arranged on the first discharge port side of the first packing unit and is provided with a second blocking part and a second discharge port, and the position of the second blocking part is arranged corresponding to that of the first discharge port, so that the material flowing through the first discharge port is blocked by the second blocking part, flows through the second discharge port and flows into the first packing unit of the next layer when a plurality of packing assemblies are stacked.

Therefore, after the materials flow through the first packing unit, the materials are blocked by the second blocking part to generate reinforced mixing, then flow through the second discharge port and flow into the first packing unit of the next layer, and therefore the materials flow through the packing assembly, and mixing can be achieved.

Optionally, the first discharge opening and the second discharge opening each independently project in the discharge direction, for example having a conical outlet cross-sectional configuration.

Therefore, the discharge port is protruded, and the function of guiding the materials to flow to the blocking part is achieved, so that the mixing strength is increased; the conical outlet maximizes the material flow velocity at the outlet, forms turbulent mixing, and generates baffling mixing when reaching the blocking part.

Preferably, the first packing unit further has a first blocking portion, and the second discharge hole is disposed corresponding to the first blocking portion.

So, under the condition of multilayer filler subassembly, the material flows through after the second discharge gate, when arriving the first barrier part of next layer filler subassembly, and turbulence mixing and baffling mix equally can take place to make the material flow through the discharge gate of filler subassembly at every turn, all can produce the mixture, thereby produce the maximum mixing intensity. In some embodiments, a baffle member is disposed between the first discharge port and the first blocking portion of the first packing unit, so that when the material flows from the first blocking portion to the first discharge port, the baffling is further performed, increasing the mixing degree. In some embodiments, a baffle member is disposed between the second discharge port and the second blocking portion of the second packing unit, so that when the material flows from the second blocking portion to the second discharge port, the baffled flow is further performed, increasing the mixing degree.

Preferably, the first discharge hole is formed in the middle of the first packing unit, and the second discharge hole is formed in the edge of the second packing unit; or the second discharge hole is formed in the middle of the second packing unit, and the first discharge hole is formed in the edge of the first packing unit.

So, keep away from the setting with first discharge gate and second discharge gate as far as possible in footpath to when making to mix in each grade packing component, the material has the longest flow, and the maximize is reinforceed and is flowed the effect of mixing.

Preferably, the first packing element and the second packing element are each independently formed with a packing material having a packing material layer on the outer periphery thereofLongitudinal directionFirst and second support walls extending, said first and second support walls being shaped to fit into and abut each other so as to form a mixing space between said second packing element and said first packing element.

In this way, support walls are formed at the edges of the packing elements and the shapes of these support walls are matched with each other, so that an overall longitudinally extending mixing space can be easily formed between the packing elements and between adjacent packing elements between adjacent packing assemblies, thereby giving a sufficient flow path for turbulent mixing and maximizing the effect of turbulent mixing. Here, the longitudinal direction refers to a direction in which a pipe body of the reactor extends, and also refers to a direction in which the first packing unit and the second packing unit are sequentially arranged one above another.

Preferably, the first and second packing elements each have rounded edges.

As such, the first packing element and the second packing element are suitable for a tubular reactor. In some embodiments, the second discharge port is arranged at the edge of the second packing unit, and a plurality of notches are formed on the circular edge of the second packing unit, and are matched with the edge of the pipeline reactor to form the second discharge port; in some embodiments, the first discharge port is disposed at an edge of the first packing unit, and a plurality of notches are formed on the circular edge of the first packing unit, which cooperate with an edge of the pipe-type reactor to form the first discharge port. In some embodiments, the first discharge port and the second discharge port are independently arranged in a plurality of close proximity, so that the higher the reynolds number of the material flow is, the more turbulent flow is, and mixing is formed between the respective turbulent mixed flows at the same total material flow rate. The second discharge hole is arranged along the pipe wall, so that the heat transfer efficiency can be increased, and the heat dissipation is facilitated. )

Preferably, the first packing element and the second packing element are provided separately and/or integrally with each other so as to be detachably mounted in the tube body of the reactor.

Thus, the first packing unit and the second packing unit are separated and/or integrated with each other, so that the first packing unit and the second packing unit can be conveniently installed in the pipeline reactor, and can be arranged in a modularized mode according to the length of the pipe body. In particular, the integrated arrangement makes it possible to avoid installation errors, such as the repeated installation of two adjacent first packing units.

Preferably, the first packing unit is a bucket-shaped structure with the first discharge port at the bottom, the second packing unit is a bucket-shaped structure with the second discharge port at the edge, and the bottom of the bucket-shaped structure of the first packing unit is sleeved in the bucket-shaped structure of the second packing unit, so that materials flow through the bucket surface and the bucket back of the first packing unit and the second packing unit respectively, and the materials are continuously collected and dispersed when flowing through the two packing units except for the effect of baffling and mixing.

Thus, the modular structure of the first packing unit and the second packing unit is convenient for design, manufacture and installation, and can be suitable for filling pipeline reactors with different structures.

The invention also relates to a pipeline type reactor, which comprises a pipeline type reactor body, wherein a tubular reaction channel is arranged in the pipeline type reactor body; and one or more packing assemblies as described above, wherein the edges of the first and second packing elements of the packing assembly interfit with the shape of the tubular reaction channel such that the fluid reactants are transported through the packing assembly in the tubular reaction channel.

In this way, the pipe reactor according to the invention can withstand high pressures. In contrast, conventional reactors have not achieved such good results. Particularly, in the plate reactor, because the reaction channel is carved on the plate, a plurality of plates are mutually overlapped and pressed by the screw, in order to overcome the expansion and contraction caused by the temperature change, springs are adopted at the two ends of the screw to compensate the pressing force, and therefore, better sealing and higher pressure bearing can not be realized. The pipe reactor according to the present invention can withstand a large reaction pressure and a high reaction temperature, and at the same time, has a high mixing strength and a low liquid holdup, so that safety performance is greatly improved.

Preferably, the tubular reactor comprises at least two packing assemblies as described above stacked, with adjacent second and first packing elements between adjacent two packing assemblies abutting each other to form a certain mixing space between the two packing assemblies.

Therefore, in the pipeline type reactor, when materials pass through, better mixing effect can be formed among all the packing components and inside the packing components, and the effect of the packing can be fully exerted.

According to the technical scheme, the filling unit which is easy to mix materials is adopted in the reaction path, so that reactants are fully mixed and contacted in the reaction pipeline, the mass transfer coefficient is greatly increased, the reaction pipeline serves as a main reaction area, and a reaction kettle is omitted; the reaction pipeline has a small diameter and adopts a pipeline type reactor, so that the reactor can bear high pressure; the liquid holdup of the reaction pipeline is low, and the danger is low when high-risk chemical reaction is carried out; the reactants are vigorously stirred while being conveyed in the reactor, and thus are suitable for various heterogeneous reactions, such as gas-liquid-solid three-phase reaction, liquid-liquid reaction, gas-liquid reaction, solid-liquid reaction, and the like.

Essentially, the pipe reactor according to the present invention is a continuous flow pipe reactor in which the passages are manufactured by a finishing process, the size of the pipes is not particularly limited, and the diameter thereof is generally between 0.01 and 1 meter, for example, 2 cm to 0.9 meter, 3 cm to 0.8 meter, 4 cm to 0.7 meter, 5 cm to 0.6 meter, 6 cm to 0.5 meter, 7 cm to 0.45 meter, 8 cm to 0.4 meter, 9 cm to 0.35 meter, 0.1 meter to 0.3 meter, 0.15 meter to 0.25 meter. Due to the small size of the channels for the process fluid in the reactor, the specific surface to volume ratio is very large compared to conventional tubular reactors, so that the reactor has high mixing efficiency (radial thorough mixing in the millisecond range), strong heat exchange capacity and short residence time distribution. The two characteristics of the pipeline reactor, namely large specific surface area and continuous operation mode, make the accurate control of the reaction process possible. Compared with the traditional intermittent reaction process, the pipeline reactor has the advantages of high-speed mixing, high-efficiency heat transfer, narrow distribution of reactant residence time, good repeatability, quick and convenient system response, almost no amplification effect, small on-line chemical quantity, high safety performance and the like.

Drawings

To more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings of the embodiments will be briefly introduced below, and it is apparent that the drawings in the following description relate only to some embodiments of the present disclosure and are not limiting to the present disclosure.

Fig. 1 is a partial sectional view of a pipe reactor 100 according to the present invention, in which the arrangement of packing elements 2 inside a pipe body 1 is shown.

Fig. 2 is an enlarged view of a portion a of fig. 1.

Fig. 3a is a cross-sectional view of the first packing element 21.

Fig. 3 b-3 c are cross-sectional and top views of the second packing element 22.

Fig. 4 is a flow diagram of the reaction mass in the packing element 2.

Fig. 5a-5b are block diagrams illustrating the hollow nut 32.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present disclosure more apparent, the technical solutions of the embodiments of the present disclosure will be described clearly and completely with reference to the drawings of the embodiments of the present disclosure. It is to be understood that the described embodiments are only a few embodiments of the present disclosure, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the disclosure without any inventive step, are within the scope of protection of the disclosure.

In the present application, each term has a meaning generally understood in the art, unless otherwise indicated or a different meaning can be derived from the context.

The pipe reactor according to the invention is suitable for the following application scenarios:

A. strongly exothermic reaction: for strongly exothermic reactions, the conventional reactor generally adopts a gradual dropping mode, and even if the dropping mode is adopted, local overheating can occur at the moment of dropping, and a certain amount of by-products are generated. The pipeline reactor can lead out heat in time, realize accurate control on reaction temperature, eliminate local overheating and obviously improve the yield and selectivity of the reaction.

B. Reaction in which the reactants or products are unstable: some reactants or products formed are unstable and decompose with a slightly longer residence time in the reactor, reducing yield. In the pipe-type reactor according to the present invention, since the material is continuously flowing, its residence time in the reactor is short and its residence time can be precisely controlled, thereby effectively reducing decomposition of reactants and products and improving yield.

C. The quick reaction with strict requirements on the reaction ratio: the proportion of some reactions to materials is strict, wherein an excessive amount of a certain reactant can cause side reactions (such as mono-substituted reaction, and di-substituted and tri-substituted products), and because the pipeline type reactor system can realize instant uniform mixing of materials, local excessive amount can be avoided, and the generation of by-products is reduced to the minimum.

D. Hazardous chemical reactions and high temperature high pressure reactions: for some chemical reactions which are easy to lose control, the reaction temperature can be increased rapidly and the reaction pressure can be increased rapidly to cause material flushing and even explosion. Whereas in the pipe reactor according to the invention: firstly, reaction heat can be quickly led out, so that the reaction temperature can be effectively controlled within a safety range, and the risk of runaway is reduced to the lowest; second, because of the continuous flow reaction, even if an unmeasured reaction occurs, the hazard it poses is negligible because of the minimal amount of chemicals on-line. The pipe reactor according to the invention is therefore very suitable for such reactions from the point of view of safety.

E. Nanomaterial and particle formation reactions or polymerization reactions requiring uniform distribution of the product: because the pipeline reactor can realize the uniform mixing of materials, the time for forming and growing particles is basically consistent in the reaction of forming precipitates, and the particle size of the obtained particles has the characteristic of narrow distribution. For some polymerizations, a narrow distribution of degrees of polymerization is obtained.

Fig. 1 is a partial cross-sectional view of a pipe reactor 100 according to the present invention, showing the arrangement of packing elements 2 (or packing elements) inside a pipe body 1, showing the use of multiple sets of packing elements in a stacked, aligned arrangement in the pipe reactor. Fig. 2 is an enlarged view of portion a of fig. 1, showing that each packing element includes a first packing element and a second packing element. Fig. 3a is a cross-sectional view of the first packing element 21. Fig. 3 b-3 c are cross-sectional and top views of the second packing element 22. Fig. 4 is a flow diagram of the reaction mass in the packing element 2.

As shown in fig. 1, the pipe reactor 100 according to the present invention includes: a pipe body 1, a packing member 2, a connecting member 3, and a cooling jacket 4.

The tubular body 1 is an elongated tubular body. The packing member 2 is filled in the middle of the tube body 1 to form a baffling channel, which may be constructed as a modular combination of a plurality of packing elements, as will be described in detail below. The connection members 3 are respectively fixed to both ends of the pipe body 1 in the length direction for fixing the ends of the pipe body 1, and may be connected with other pipe reactors by means of interconnection members.

As shown in fig. 2 and 3a-3c, the packing element 2 comprises a first packing element 21 and a second packing element 22 placed one above the other in order from top to bottom. That is, the first packing unit 21 and the second packing unit 22 are separately disposed from each other or integrally provided, and are sequentially communicated due to their shapes and structures to be fitted to each other, so that they can be stacked and filled in the tube body 1 or can be separately removed from the tube body 1. The structure is flexible in design and convenient to manufacture and install respectively.

The first packing unit 21 has a tapered shape, and includes a first bucket 211 (i.e., a first stopper forming an inlet 211'), a center hole 212 (i.e., a first discharge hole) located at the center of the first bucket 211, and a first support wall 213 located at a circumferential edge of the first bucket 211 and extending upward.

The second packing unit 22 has a similar tapered shape to the first packing unit 21, and includes a second bucket 221 (i.e., a second stopper), an edge hole 222 (i.e., a second discharge hole) at a circumferential edge of the second bucket 221, and a second support wall 223 at a circumferential edge of the second bucket 221 and extending upward. Since the first and

second support walls

213 and 223 are raised upward from the respective bucket portions by a predetermined distance, the shapes and sizes thereof are matched. When the first packing element 21 and the second packing element 22 are arranged correspondingly and are stacked on each other, the first and

second bucket parts

211 and 221, and the first and

second support walls

213 and 223 are arranged oppositely and integrally surround, thereby forming a passage for flow mixing of the reaction materials, as shown in fig. 4.

Referring to fig. 4, as indicated by the flow direction indicated by the arrow, in actual use, after the materials to be mixed enter the reaction channel, the materials first flow downward along the first bucket 211 of the first packing unit 21, during the flow guided by the tapered surface of the first bucket 211, the materials collide to realize a first intensive mixing (including turbulent mixing and baffling mixing) and reaction, merge into and pass through the central hole 212, and then are blocked by the bottom of the second bucket 221 of the second packing unit 22 below, the turbulence degree is enhanced due to the structural change to cause a second intensive mixing and reaction, the materials after the second intensive mixing and reaction further flow back along the tapered surface of the second bucket 221, in the long and narrow channel, the materials fully react, continue to pass through the edge hole 222 at the circumferential edge of the second bucket 221 to form a second descending flow, and flow to the subsequent first packing unit 21 again, entering the first bucket part. Thus, the above process is repeated for a plurality of times of intensive mixing and reaction until the reaction reaches the desired degree.

More intuitively, in the invention, a plurality of groups of bucket-shaped structures are arranged at intervals in a sleeved mode, wherein the first filler unit of each group is a bucket-shaped structure with an opening at the bottom, the second filler unit is a bucket-shaped structure with an opening at the edge, and the opening at the bottom of the first filler unit is sleeved in the bucket-shaped structure of the second filler unit, so that in the process that materials sequentially flow through the bucket surface and the bucket back of the first and second filler units, besides the turning-back mixing caused by the blocking structures at the openings, the reinforced mixing effect is caused by the continuous gathering and dispersion of flow paths.

The narrow channel structure in the pipeline reactor increases the temperature gradient, and the larger specific surface area greatly enhances the heat transfer capacity of the pipeline reactor, the heat transfer coefficient can reach 2500W/(m 2), and the heat transfer coefficient is at least one order of magnitude larger than that of the traditional heat exchanger.

For a hybrid reactor, the relationship between transit time and distance can be described by the following equation

In the formula (1), t_minThe time required to reach complete mixing; i-the transmission distance; d is the diffusion coefficient. The mixing time is in direct proportion to the quadratic power of the transfer distance, so the size of the channel is narrow, and the reaction mixing time is greatly improved.

In addition, in the upper and lower packing members 2, the first packing unit 21 of the lower layer may be further provided with, for example, a concave first blocking portion (not shown) at the edge hole 222 corresponding to the second packing unit 22 of the upper layer, so that the materials can be mixed again and flow out each time.

Therefore, according to the concept of the invention, the structure sleeved on the upper hopper part and the lower hopper part provides two independent and mutually communicated material mixing and reaction areas, and two times of intensified mixing and reaction occur in a single packing part, so that the mixing efficiency is improved, the full reaction of materials is facilitated, the limited inner space of a pipe is also facilitated to be fully utilized, the flow rate of the materials is increased, the mixing path is lengthened, the volume required by a mixing structure is reduced, and the device is particularly suitable for the production of high-risk chemicals.

In addition, the cross-sectional shapes of the bucket parts of the first packing unit 21 and the second packing unit 22 include, but are not limited to, a V-shaped cone, and also can be a circular arc shape or a polygonal prism, and the bucket parts are of a symmetrical structure and are symmetrically arranged along the extension line of the extension channel of the outlet as a symmetrical axis, so that the design can ensure that the flow process and the flow speed of media (such as fluid) discharged from two sides are more or less consistent, and the mixing efficiency is further improved. Meanwhile, the illustrated center hole 212 is only one, and the illustrated edge holes 222 are 4, but those skilled in the art will appreciate that the number and form of the holes are not limited, and may be one or more, may be circular, or other suitable shapes, as long as an open space for material flow is provided. Alternatively, the holes may be outlets having a tapered cross-sectional configuration.

The connection parts 3 and 3 'are located at both ends of the length direction of the pipe body 1 and include connection flanges 31 and 31', hollow nuts 32 and 32 'having external threads, and interconnection units 33 and 33'. One of the connecting flanges 31 is fixed to the tubular body 1, and its packing hole 311 is sized to be sufficient for the first packing element 21 and the second packing element 22 to be inserted through the packing hole 311, and then screwed into the packing hole 311 with the hollow nut 32 after the installation is completed, so that the packing member 2 can be just pressed and fixed in the tubular body 1. Of course, other coupling means may be used to fix the packing member 2, and the screw structure is not limited to the above. As shown in fig. 5a-5b, the central hole 321 of the hollow nut 32 serves as a material inlet and outlet, and also serves for mounting and fixing.

Of course, besides single-tube use, a plurality of pipeline reactors can be connected in series, and the modularization of the connecting parts 3 provides the possibility of flexible configuration, so that the pressure and the danger of dangerous chemicals during reaction are reduced due to the limited amount of materials entering the single pipeline reactor, and the production safety is ensured. At the interface where the respective reactors are coupled, an interconnection unit 33 and detection means for detecting process parameters such as reaction temperature, pressure, etc. are provided.

The cooling liquid jacket 4 circulates inside by injecting heating or cooling liquid into the cooling liquid channel through, for example, ports 41 and 42 (fig. 1) disposed at the upper and lower portions of the pipe body. Here, the coolant jacket 4 is an integral type, and is provided with a coolant flow passage.

The packing member 2 may be a metallic material such as stainless steel, nickel-based alloy, special non-ferrous metals (titanium, tantalum, niobium, zirconium, etc.), or a combination of one or more of non-metallic materials (such as SiC, acryl, quartz, etc.). Different passageway materials can be changed according to the reaction requirement of difference to adapt to different reaction conditions, more high pressure resistant like the metal material, the SiC material is more resistant to acid and alkali corrosion. The replacement can be performed at different chemical or physical reactions.

The reaction mass may be gaseous, liquid or solid and is used to perform a physical reaction (mixing, dispersing, emulsifying, suspending, etc.) or a chemical reaction (oxidation; reduction, etc.) within the channel.

Since the present invention is designed particularly for the production and manufacture of high-pressure hazardous chemicals, not only the inside of the pipe reactor is sealed, but also the reaction time and reaction speed of the materials are controlled to be within a desired range by adjusting the pressure difference between the material inlet and the material outlet. When the reaction time is required to be shortened and the reaction speed is required to be accelerated, the pressure difference between the inlet and the outlet is increased, the flow speed is accelerated, and the reactant is discharged from the material outlet as soon as possible. On the contrary, when the reaction time needs to be prolonged and the reaction speed needs to be slowed down, the pressure difference between the inlet and the outlet is reduced, and then the reactants stay more and are discharged from the material outlet.

In order to be able to adequately maintain the mixing efficiency and degree of reaction, one skilled in the art will appreciate that the length and diameter of the tubular reactor should be designed and maintain a suitable length-to-diameter ratio, according to the design of the present invention. In the present embodiment, tube inner diameters in the range of 300-1000mm are employed, and tube inner diameters of 500mm, 400mm, 300mm, 200mm, 150mm, 100mm, 60mm, 40mm, 30mm, 20mm are more preferable. An excessively large inner diameter of the pipe increases the liquid holdup of the reactor, increasing the risk. Too small a tube inner diameter makes manufacturing difficult and the line speed during mixing is limited and does not give a good mixing effect. In addition, the taper of the conical structures of the first packing unit 21 and the second packing unit 22 is preferably in the range of 45-80 degrees, and the gentler slope can increase the material flow mixing time, so that the space in the pipe can be utilized maximally to strengthen the material flow for multiple times, and the stroke of the materials in the pipe can be increased.

Therefore, the pipeline reactor can obviously improve the mixing degree of the fluid, enhance the mass transfer performance, improve the total heat transfer efficiency, shorten the reaction time, improve the reaction yield and the product purity, reduce the potential safety hazard, and is suitable for various low-temperature, high-risk, heterogeneous and other chemical reactions. For example, the pipeline reactor can be applied to the production process of the continuous reaction of flammable and explosive triethyl aluminum, the design pressure of the pipe body is 9.8MPa, and the design temperature is 150 ℃.

In conclusion, the pipeline reactor has small internal channel size and small fluid thin layer distance, and can realize rapid micro-mixing of reaction materials through viscous deformation and molecular diffusion of fluid micro-clusters; the pipeline reactor has a very large specific surface area, and a sufficient contact area is formed between the fluid and the wall of the reactor, so that the heat exchange efficiency is obviously improved, and the in-situ high-efficiency heat exchange in the reaction process can be realized; moreover, a small amount of liquid holdup in the channel of the microchannel reactor ensures that the microchannel reactor has obvious safety performance; in conclusion, the reactor can be applied to the chemical reaction processes of rapid mixing, strong heat release, flammability and explosiveness, and can obviously improve the process safety and realize the continuous operation process.

The present application includes the following embodiments:

embodiment 1. a packing assembly, comprising:

the first filling unit is provided with a first discharge hole, so that the materials flow out through the first discharge hole; and

the second packing unit is arranged on the first discharge port side of the first packing unit and is provided with a second blocking part and a second discharge port, and the position of the second blocking part is arranged corresponding to the first discharge port, so that the material flowing through the first discharge port is blocked by the second blocking part, flows through the second discharge port and flows into the next layer when a plurality of packing assemblies are stacked.

In some embodiments, the packing elements have a diameter of 0.01 to 1 meter.

Embodiment 2. the packing assembly of other embodiments, wherein the first and second ports each independently project in a discharge direction, such as a conical outlet.

Embodiment 3. the packing assembly according to other embodiments, wherein the first packing unit further has a first stopper, and the second discharge port is disposed at a position corresponding to the first stopper.

Embodiment 4. the packing assembly of other embodiments, wherein the first outlet is disposed at a middle portion of the first packing unit, and the second outlet is disposed at an edge of the second packing unit; or the second discharge hole is formed in the middle of the second packing unit, and the first discharge hole is formed in the edge of the first packing unit.

Embodiment 5. the packing assembly of other embodiments, wherein the first and second packing elements are each independently formed with longitudinally extending first and second support walls at the outer periphery, the first and second support walls being shaped to fit into and abut each other to form a predetermined mixing space between the second packing element and the first packing element.

Embodiment 6. the packing assembly of other embodiments, wherein the first packing element and the second packing element each have rounded edges.

Embodiment 7. the packing assembly of other embodiments, wherein the first and second packing elements are separate and/or integrated with each other and are removably mountable within a reactor.

Embodiment 8. the packing assembly according to any other embodiment, wherein the first packing unit is a bucket structure having the first discharge port at the bottom, the second packing unit is a bucket structure having the second discharge port at the edge, and the bottom of the bucket structure of the first packing unit is fitted in the bucket structure of the second packing unit, so that the materials flow through the bucket surfaces and the bucket backs of the first and second packing units, respectively.

Embodiment 9 a tubular reactor comprising a tubular reactor body having a tubular reaction channel therein; and one or more of the packing assemblies of any one of embodiments 1-8, wherein the outer peripheral edges of the first and second packing elements of the packing assembly are shape-interfitted with the inner peripheral edge of the tubular reaction channel such that a fluid reactant is transported through the packing assembly in the tubular reaction channel.

Embodiment 10 the tubular reactor according to embodiment 9, comprising at least two stacked packing assemblies according to any one of embodiments 1 to 8, wherein adjacent second packing elements and first packing elements between two adjacent packing assemblies abut against each other to form a predetermined mixing space between the two packing assemblies.

The present invention has been illustrated by the above embodiments, but it should be understood that the above embodiments are for illustrative and descriptive purposes only and are not intended to limit the invention to the scope of the described embodiments. Furthermore, it will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that many variations and modifications may be made in accordance with the teachings of the present invention, which variations and modifications are within the scope of the present invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A packing assembly comprising:

2. The packing assembly of claim 1, wherein the first and second ports each independently project in a discharge direction, such as a conical outlet.

3. The packing assembly of claim 1 or 2, wherein the first packing unit further has a first blocking portion, and the second discharge port is positioned corresponding to the first blocking portion.

4. The packing assembly of claim 1 or 2, wherein the first outlet is provided in the middle of a first packing element and the second outlet is provided at the edge of a second packing element; or the second discharge hole is formed in the middle of the second packing unit, and the first discharge hole is formed in the edge of the first packing unit.

5. The packing assembly of claim 1 or 2, wherein the first and second packing elements are each independently formed at the outer periphery with longitudinally extending first and second support walls that are shaped to fit and abut each other to form a predetermined mixing space between the second packing element and the first packing element.

6. The packing assembly of claim 1 or 2, wherein the first and second packing elements each have rounded edges.

7. The packing assembly according to claim 1 or 2, wherein the first and second packing units are provided separate and/or integrated with each other and are removably mountable within the reactor.

8. The packing assembly of claim 1 or 2, wherein the first packing element is a bucket-like structure with the first outlet at the bottom, the second packing element is a bucket-like structure with the second outlet at the edge, and the bottom of the bucket-like structure of the first packing element fits inside the bucket-like structure of the second packing element, whereby material flows through the bucket faces and bucket backs of the first and second packing elements, respectively.

9. A pipeline reactor comprises a pipeline reactor body, wherein a tubular reaction channel is arranged in the pipeline reactor body; and one or more packing assemblies as recited in any one of claims 1 to 8, wherein the outer peripheral edges of the first and second packing elements of the packing assembly are form-fit with the inner peripheral edge of the tubular reaction channel such that the fluid reactants are transported through the packing assembly in the tubular reaction channel.

10. A tubular reactor according to claim 9, comprising at least two packing assemblies according to any one of claims 1 to 8 stacked, adjacent second and first packing units between two adjacent packing assemblies abutting each other, forming a predetermined mixing space between the two packing assemblies.