CN112403414A - Micro-channel continuous catalytic device and working method thereof - Google Patents
Micro-channel continuous catalytic device and working method thereof Download PDFInfo
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Abstract
A micro-channel continuous catalytic device and a working method thereof comprise a reactor and a waste heat recoverer; the reactor comprises a reactor shell and a plurality of reactor bodies, wherein the plurality of reactor bodies are distributed in parallel and bunched inside the reactor shell with the single-pipe flow regulating valve through the soft and hard reducing joints; the reactor body comprises an inner sleeve, an intermediate sleeve and an outer sleeve, wherein the inner sleeve and the intermediate sleeve are both provided with internal threads and external threads, the outer sleeve is provided with internal threads, and a spiral circulation path formed between the outer wall of the inner sleeve and the inner wall of the intermediate sleeve is used as a reaction channel. The microchannel continuous catalytic device and the working method thereof have reasonable structural design, realize the free and continuous combination of the amplification factor of the reactor, different pipe diameters and the size of the opening of a single pipe, are convenient for maintaining and replacing parts, are convenient for cleaning, improve the heat transfer coefficient and the heat exchange effect of the reactor, and have simple working method, high efficiency and wide application prospect.
Description
Technical Field
The invention belongs to the technical field of catalytic devices, and particularly relates to a micro-channel continuous catalytic device and a working method thereof.
Background
The level of chemical production is usually the best embodiment of national strength, the strengthening of the chemical process is always an important subject of the chemical production process, and people gradually aim at a microreactor which has high heat and mass transfer, large specific surface area, easy control, reliability and flexibility when facing the problems of environmental pollution, energy shortage, low conversion rate and the like.
Since the 80 s of the 20 th century, the concept of 'microreactor' has been proposed to be developed rapidly, and the microreactor has been gradually applied to various chemical fields such as medicine, biology, textile, catalysis and the like by virtue of the characteristics of delicacy, flexibility, rapidness, high efficiency, easiness in amplification and the like. With the development of society, the chemical production process of today puts forward new requirements on the microreactor such as continuous production, low energy consumption, low pollution, high production efficiency and the like, and with the improvement of production technology, the research and development of high-performance materials and the improvement of high-precision numerical control processing technology, a microchannel continuous catalytic device and a working method thereof need to be developed so as to meet the requirements on continuous feeding and module flexibility, shorten the process time and adapt to the development requirements of chemical production under new conditions.
The Chinese patent application No. CN201920655079.X discloses an electrically-driven catalytic reaction device, which is used for driving catalytic reaction by an electric field, is particularly suitable for catalyzing combustion reaction of air pollutants, and does not improve the continuous production capacity, efficiency and stability of the catalytic reaction device.
Disclosure of Invention
The purpose of the invention is as follows: in order to overcome the defects, the invention aims to provide a microchannel continuous catalytic device and a working method thereof, the microchannel continuous catalytic device has reasonable structural design, realizes the free and continuous combination of the amplification factor of a reactor, different pipe diameters and the size of a single pipe opening, is convenient for maintaining and replacing parts, is convenient for cleaning, improves the heat transfer coefficient and the heat exchange effect of the reactor, and has simple working method, high continuous production efficiency and wide application prospect.
The purpose of the invention is realized by the following technical scheme:
a micro-channel continuous catalytic device comprises a reactor and a waste heat recoverer; the reactor comprises a reactor shell and a plurality of reactor bodies, wherein the plurality of reactor bodies are distributed in parallel and bunched inside the reactor shell with the single-pipe flow regulating valve through the soft and hard reducing joints; the reactor body comprises an inner sleeve, a middle sleeve and an outer sleeve, wherein the inner sleeve and the middle sleeve are both provided with internal threads and external threads, the outer sleeve is provided with internal threads, a spiral circulation path formed between the outer wall of the inner sleeve and the inner wall of the middle sleeve is used as a reaction channel, and the left end and the right end of the reaction channel are respectively provided with a reaction material inlet and a reaction material outlet; the spiral circulation path of the inner sleeve is used as a first heat exchange medium channel, the spiral circulation path formed between the outer wall of the middle sleeve and the inner wall of the outer sleeve is used as a second heat exchange medium channel, and the left end and the right end of the first heat exchange medium channel and the right end of the second heat exchange medium channel are respectively a heat exchange medium channel outlet and a heat exchange medium channel inlet; the flow directions of the fluids in the reaction channel and the heat exchange medium channel I are opposite, and the flow directions of the fluids in the reaction channel and the heat exchange medium channel II are opposite; the waste heat recoverer is connected to the outlet of the heat exchange medium channel of each reactor body and used for recovering waste heat of the heat exchange medium.
The microchannel continuous catalytic device is reasonable in structural design, a plurality of reactor bodies are clustered on the inner part of the reactor shell with the single-tube flow regulating valve in a parallel distribution mode through the soft and hard reducing joints, and are distributed in a single-layer parallel manner, so that the microchannel continuous catalytic device is convenient to clean and prevent pollution; the reactor is characterized in that the single-tube flow regulating valve realizes free continuous combination of reactor amplification factor, different tube diameters and single-tube opening size, and adopts a soft-hard reducer union on the whole structure, and parts such as a soft-hard butt joint, a reducer union and a sealing pressure ring of the soft-hard reducer union enable the reactor to be wholly detachable, so that parts can be maintained and replaced conveniently, the phenomenon that the reactor cannot be used completely due to damage of local structures is avoided, and the convenience in cleaning the reactor is guaranteed.
The number of the reactor bodies is set according to actual needs, so that the flexibility is high; the structural design of the reactor body increases the vertical collision probability and the collision strength of the reaction fluid material and the wall surface of the reactor body, improves the heat transfer coefficient of the reactor body and also improves the heat exchange effect of a heat exchange medium.
When the heat transfer medium flows out from the heat transfer medium outlet, a large amount of energy is still carried, the microchannel continuous catalysis device in the prior art, a large amount of energy of the heat transfer medium is emitted to the nature in the form of waste heat, the great waste of energy is caused, and meanwhile, the environmental problem is also caused, so that the waste heat recovery is needed.
Further, in the microchannel continuous catalytic device, the external thread of the inner sleeve and the internal thread of the middle sleeve are in opposite directions, and when viewed from one end of the reactor body, one thread is rotated clockwise, and the other thread is rotated counterclockwise.
The outer thread of the inner sleeve and the inner thread of the middle sleeve which form the reaction channel rotate clockwise from one end of the reactor, and the other thread rotates anticlockwise, so that the vertical collision probability and collision strength of the reaction fluid and the wall of the reactor are further increased, and the heat transfer coefficient of the reactor is improved.
Further, in the microchannel continuous catalytic device, the axial center lines of the inner sleeve, the middle sleeve and the outer sleeve are overlapped.
Further, in the microchannel continuous catalytic device, the waste heat recoverer comprises a plate-fin heat exchanger, a thermoelectric module and a radiating fin; the left end and the right end of the plate-fin heat exchanger are respectively provided with an inlet pipe and an outlet pipe, the inlet pipe is connected with the outlet of the heat exchange medium channel of each reactor body, and the outlet pipe is connected with a discharge pipe; the upper surface and the lower surface of the plate-fin heat exchanger are respectively provided with the same number of thermoelectric modules, and the outer side of each thermoelectric module is provided with a radiating fin for independent heat radiation.
The waste heat recoverer is reasonable in structural design, the plate-fin heat exchanger is high in heat exchange capacity, the thermoelectric module is high in arrangement efficiency, the plate-fin heat exchanger is made of high-heat-conductivity materials and is internally provided with the rectangular folding fins, and good temperature uniformity is achieved while the outer surface of the plate-fin heat exchanger is guaranteed to have high temperature.
The plate-fin heat exchanger is used for replacing energy in the heat exchange medium to serve as a hot end of the thermoelectric module and provide energy for power generation of the thermoelectric module.
Because certain error exists in processing, the plate-fin heat exchanger working area is great simultaneously, and the plane degree is difficult to guarantee, for preventing that plate-fin heat exchanger, thermoelectric module, radiating fin three welded connection from producing the too big thermoelectric module of destruction of thermal stress, every thermoelectric module uses a radiating fin alone to dispel the heat.
Furthermore, in the microchannel continuous catalytic device, the plate-fin heat exchanger and the thermoelectric module are connected with the radiating fins by brazing.
In order to reduce contact thermal resistance and improve the power generation performance of the plate-fin thermoelectric generator, the thermoelectric module is connected with the plate-fin heat exchanger and the radiating fins by a brazing method.
Furthermore, in the microchannel continuous catalytic device, two ends of the plate-fin heat exchanger are trapezoidal transition areas, the middle part of the plate-fin heat exchanger is a square area, the thermoelectric module is arranged in the square area, rectangular folded fins are arranged in the plate-fin heat exchanger at corresponding positions of the square area, and the flow direction of the rectangular folded fin channel is consistent with that of a heat exchange medium; the trapezoidal transition areas at the left end and the right end are respectively provided with an inlet and an outlet, and the inlet and the outlet are respectively communicated with an inlet pipe and an outlet pipe; and a flow dividing device is arranged in the trapezoidal transition area at the left end.
The rectangular folded fins in the plate-fin heat exchanger have the advantages that the fin channels are consistent with the flowing direction of a heat exchange medium, excessive pressure drop caused by the heat exchange medium flowing through the heat exchanger is avoided, meanwhile, the contact area between the fins and the heat exchange medium is greatly increased, and the heat exchange performance of the heat exchanger is improved. The structure of the trapezoidal transition area plays a role of excessive dispersion, avoids large flow velocity of the heat exchange medium, and enables the heat exchange medium to be more effectively dispersed and filled in each channel of the fin; a flow dividing device is arranged in the trapezoidal transition region of the inlet end, and when a heat exchange medium enters the plate-fin heat exchanger through the inlet pipe and meets the flow dividing sheets in the flow dividing device, the heat exchange medium can be effectively dispersed.
Further, in the microchannel continuous catalytic device, the thermoelectric module comprises a P-type thermoelectric arm, an N-type thermoelectric arm, a Cu electrode, a ceramic substrate and a copper plate; the P-type thermoelectric arms and the N-type thermoelectric arms are in cubic structures, the P-type thermoelectric arms and the N-type thermoelectric arms are sequentially and alternately arranged and are connected in series end to end through Cu electrodes, the upper surface and the lower surface of each of the P-type thermoelectric arms and the N-type thermoelectric arms are provided with a ceramic substrate, and the outer surface of the ceramic substrate is covered with a layer of copper plate.
The thermoelectric module is provided with a sandwich structure, the P-type thermoelectric arms and the N-type thermoelectric arms are sequentially and alternately arranged and are connected in series end to end through Cu electrodes, so that the thermoelectric module has the characteristics of small internal resistance, high output voltage and the like, and the ceramic substrates are added on the upper surfaces and the lower surfaces of the P-type thermoelectric arms and the N-type thermoelectric arms to play roles of supporting, protecting and insulating; in order to conveniently connect the thermoelectric module with the plate-fin heat exchanger and the radiating fins by adopting a brazing connection method, a layer of copper plate is coated on the outer surfaces of the upper ceramic plate and the lower ceramic plate of the thermoelectric module.
Further, foretell continuous catalytic unit of microchannel, radiating fin is close tooth type radiating fin, radiating fin includes a plurality of fin, the thickness of fin is 1 mm, the interval of fin and fin is 2 mm, the material of fin adopts 3003 aluminum alloy, radiating fin size is greater than thermoelectric module size.
The radiating fins are small in density and good in heat conductivity, the weight of the plate-fin thermoelectric generator is reduced, meanwhile, the area of heat exchange with air is effectively increased due to the large number of the fins, and the radiating effect is greatly improved.
Further, the working method of the microchannel continuous catalytic device sequentially comprises the following steps:
(1) the pre-prepared materials flow into the spiral reaction channel from the reaction material inlet after initial kinetic energy is obtained by the advection pump, the materials continuously collide in the spiral reaction channel in the flowing process, and are repeatedly sheared and cross-flowed in the processes of continuous mixing, separation and remixing under the action of centrifugal force;
(2) in the spiral flowing process of the material, in the outer sleeve of the heat exchange medium channel I of the inner sleeve and the heat exchange medium channel II formed between the outer wall of the middle sleeve and the inner wall of the outer sleeve, the heat exchange medium continuously flows into the outer sleeve from the inlet of the heat exchange medium channel, meanwhile, the surfaces of the heat exchange medium channel I and the heat exchange medium channel II are continuously washed, and the heat exchange medium continuously flows into the waste heat recoverer from the outlet of the heat exchange medium channel for recovering the waste heat of the heat exchange medium;
(3) the number of reactor bodies in the reactor shell which are put into use is adjusted through the single-pipe flow regulating valve.
Compared with the prior art, the invention has the following beneficial effects:
(1) the microchannel continuous catalytic device disclosed by the invention is reasonable in structural design, adopts non-contact visual detection to carry out comprehensive defect detection on the bottle mouth, the bottle body and the bottle bottom of the glass bottle, is high in automation, high in precision and efficiency, high in intelligent degree, capable of avoiding various defects such as missing detection, false detection, low efficiency and the like, and wide in application prospect;
(2) the working method of the microchannel continuous catalytic device disclosed by the invention is simple, and overcomes the adverse effect caused by shaking in the transmission process of the glass bottle through image processing, so that the detection result is more stable and accurate, and the anti-interference performance is enhanced; through the improvement of defect processing judgment, the judgment precision is obviously improved, the quality and the qualification rate of glass bottle products are improved, and the labor cost is reduced.
Drawings
FIG. 1 is a schematic view of the external appearance of a reactor of a microchannel continuous catalytic device according to the present invention;
FIG. 2 is a schematic structural diagram of a waste heat recovery device of the microchannel continuous catalysis device;
FIG. 3 is a schematic cross-sectional view of a reactor body of a microchannel continuous catalytic device according to the present invention;
FIG. 4 is a schematic structural view of a thermoelectric module of the microchannel continuous catalytic device according to the present invention;
FIG. 5 is a schematic structural view of a plate-fin heat exchanger of a microchannel continuous catalytic device according to the present invention;
in the figure: the reactor comprises a reactor 1, a reactor shell 11, a reactor body 12, an inner sleeve 121, an intermediate sleeve 122, an outer sleeve 123, a reaction channel 124, a reaction material inlet 1241, a reaction material outlet 1242, a first heat exchange medium channel 125, a first heat exchange medium channel outlet 1251, a second heat exchange medium channel 1252, a second heat exchange medium channel 126, a flexible and rigid reducer union 13, a single-pipe flow regulating valve 14, a waste heat recoverer 2, a plate-fin heat exchanger 21, an inlet pipe 211, an outlet pipe 212, a trapezoidal transition region 213, a square region 214, an inlet 215, an outlet 216, a thermoelectric module 22, a P-type thermoelectric arm 221, an N-type thermoelectric arm 222, a Cu electrode 223, a ceramic substrate 224, a copper plate 225 and a heat radiating fin 23.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the following specific embodiments and accompanying fig. 1-5, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1, 2 and 3, the device comprises a reactor 1 and a waste heat recoverer 2; the reactor 1 comprises a reactor shell 11 and a plurality of reactor bodies 12, wherein the plurality of reactor bodies 12 are bundled in the reactor shell 11 with a single-pipe flow regulating valve 14 through soft and hard reducing joints 13 in a parallel distribution mode; the reactor body 12 comprises an inner sleeve 121, an intermediate sleeve 122 and an outer sleeve 123, wherein the inner sleeve 121 and the intermediate sleeve 122 are both provided with internal threads and external threads, the outer sleeve 132 is provided with internal threads, a spiral circulation path formed between the outer wall of the inner sleeve 121 and the inner wall of the intermediate sleeve 122 is used as a reaction channel 124, and the left end and the right end of the reaction channel 124 are respectively a reaction material inlet 1241 and a reaction material outlet 1242; the spiral flow path of the inner sleeve 121 itself is used as a first heat exchange medium channel 125, the spiral flow path formed between the outer wall of the middle sleeve 122 and the inner wall of the outer sleeve 123 is used as a second heat exchange medium channel 126, and the left end and the right end of the first heat exchange medium channel 125 and the second heat exchange medium channel 126 are respectively a heat exchange medium channel outlet 1251 and a heat exchange medium channel inlet 1252; the flow directions of the fluids in the reaction channel 124 and the first heat exchange medium channel 125 are opposite, and the flow directions of the fluids in the reaction channel 124 and the second heat exchange medium channel 126 are opposite; the waste heat recoverer 2 is connected to the outlet 1251 of the heat exchange medium channel of each reactor body 12 and is used for recovering waste heat of the heat exchange medium.
Further, as shown in fig. 3, the external thread of the inner sleeve 121 and the internal thread of the intermediate sleeve 122 are opposite in direction, and one thread is clockwise rotated and the other thread is counterclockwise rotated when viewed from one end of the reactor body 12.
Further, the axial center lines of the inner sleeve 121, the intermediate sleeve 122, and the outer sleeve 123 overlap.
Further, as shown in fig. 2, the waste heat recoverer 2 includes a plate-fin heat exchanger 21, a thermoelectric module 22 and a heat dissipation fin 23; the left end and the right end of the plate-fin heat exchanger 21 are respectively provided with an inlet pipe 211 and an outlet pipe 212, the inlet pipe 211 is connected with the outlet 1251 of the heat exchange medium channel of each reactor body 12, and the outlet pipe 212 is connected with a discharge pipe; the upper surface and the lower surface of the plate-fin heat exchanger 21 are respectively provided with the same number of thermoelectric modules 22, and the outer side of each thermoelectric module 22 is provided with a radiating fin 23 for independent heat radiation.
Furthermore, the plate-fin heat exchanger 21 and the thermoelectric module 22 are connected with each other and the thermoelectric module 22 and the radiating fins 23 are connected with each other by brazing.
Further, as shown in fig. 5, the two ends of the plate-fin heat exchanger 21 are trapezoidal transition regions 213, the middle part of the plate-fin heat exchanger is a square region 214, the thermoelectric module 22 is arranged in the square region 214, rectangular folded fins are arranged in the plate-fin heat exchanger 21 at positions corresponding to the square region 214, and the channels of the rectangular folded fins are in the same direction as the flow direction of the heat exchange medium; the trapezoidal transition regions 213 at the left end and the right end are respectively provided with an inlet 215 and an outlet 216, and the inlet 215 and the outlet 216 are respectively communicated with the inlet pipe 211 and the outlet pipe 212; a flow dividing device is arranged in the trapezoidal transition area 213 at the left end.
Further, as shown in fig. 4, the thermoelectric module 22 includes a P-type thermoelectric arm 221, an N-type thermoelectric arm 222, a Cu electrode 223, a ceramic substrate 224, and a copper plate 225; the P-type thermoelectric arms 221 and the N-type thermoelectric arms 222 are of a cubic structure, the P-type thermoelectric arms 221 and the N-type thermoelectric arms 222 are alternately arranged in sequence and are connected in series end to end through Cu electrodes 223, the ceramic substrates 224 are added on the upper and lower surfaces of the P-type thermoelectric arms 221 and the N-type thermoelectric arms 222, and a copper plate 225 is coated on the outer surface of the ceramic substrate 224.
Further, radiating fin 23 is close tooth type radiating fin, radiating fin 23 includes a plurality of fin, the thickness of fin is 1 mm, the interval of fin and fin is 2 mm, the material of fin adopts 3003 aluminum alloy, radiating fin 23 size is greater than thermoelectric module 22 size.
Examples
The working method of the microchannel continuous catalytic device comprises the following steps:
(1) the pre-prepared materials obtain initial kinetic energy through the advection pump, then flow into the spiral reaction channel 124 from the reaction material inlet 1241, the materials continuously collide in the spiral reaction channel 124 in the flowing process, and are continuously mixed, separated and re-mixed under the action of centrifugal force, and are repeatedly sheared and cross-flowed;
(2) in the spiral flowing process of the material, in the outer sleeve 123 of the heat exchange medium channel II 126 formed between the first heat exchange medium channel 125 of the inner sleeve 121, the outer wall of the middle sleeve 122 and the inner wall of the outer sleeve 123, the heat exchange medium continuously flows in from the inlet 1252 of the heat exchange medium channel, meanwhile, the surfaces of the first heat exchange medium channel 125 and the second heat exchange medium channel 126 are continuously washed, and the heat exchange medium continuously flows into the waste heat recoverer 2 from the outlet 1251 of the heat exchange medium channel for recovering the waste heat of the heat exchange medium;
(3) the number of reactor bodies 12 in the reactor shell 11 that are put into use is regulated by a single-tube flow regulating valve 14.
From the above, the microchannel continuous catalytic device has reasonable structural design, a plurality of reactor bodies 12 are bundled on the inner part of the reactor shell 11 with the single-pipe flow regulating valve 14 through the soft and hard reducing joints 13 in a parallel distribution mode, and are distributed in a single-layer parallel manner, so that the device is convenient to clean and prevent pollution; the single-tube flow regulating valve 14 realizes the free continuous combination of the amplification factor, different tube diameters and single-tube opening size of the reactor, and adopts the soft and hard reducing joint 13 on the whole structure, and the soft and hard butt joints, the reducing joint, the sealing pressure ring and other parts of the soft and hard reducing joint 13 enable the reactor to be wholly detachable, so that the parts can be conveniently maintained and replaced, the complete unavailability caused by the damage of local structures is avoided, and the convenience in cleaning the reactor is ensured.
The number of the reactor bodies 12 is set according to actual needs, so that the flexibility is high; the structural design of the reactor body 12 increases the vertical collision probability and collision strength of the reaction fluid material and the wall surface of the reactor body 12, improves the heat transfer coefficient of the reactor body 12, and also improves the heat exchange effect of the heat exchange medium.
When the heat transfer medium flows out from the heat transfer medium outlet 1251, a large amount of energy is still carried, the microchannel continuous catalysis device in the prior art, a large amount of energy of the heat transfer medium is dissipated to the nature in the form of waste heat, great waste of energy is caused, and meanwhile, the environmental problem is also caused, so that waste heat recovery is needed.
Furthermore, the external thread of the inner sleeve 121 and the internal thread of the intermediate sleeve 122 which form the reaction channel 124, when viewed from one end of the reactor, one thread direction is clockwise rotation, and the other thread direction is counterclockwise rotation, so that the vertical collision probability and collision strength of the reaction fluid and the wall of the reactor are further increased, and the heat transfer coefficient of the reactor is improved.
The plate-fin heat exchanger 21 is used for replacing energy in the heat exchange medium, and serves as a hot end of the thermoelectric module 22 to provide energy for power generation of the thermoelectric module 22.
Because certain error exists in the processing, the working area of the plate-fin heat exchanger 21 is large, the flatness is difficult to guarantee, and in order to prevent the thermoelectric module 22 from being damaged by overlarge thermal stress generated by the welded connection of the plate-fin heat exchanger 21, the thermoelectric module 22 and the radiating fins 23, each thermoelectric module 22 independently uses one radiating fin 23 to radiate heat.
Furthermore, the rectangular folded fins in the plate-fin heat exchanger 21 have the fin channels consistent with the flowing direction of the heat exchange medium, so that excessive pressure drop caused by the heat exchange medium flowing through the plate-fin heat exchanger 21 is avoided, meanwhile, the contact area between the fins and the heat exchange medium is greatly increased, and the heat exchange performance of the heat exchanger is improved. The structure of the trapezoidal transition region 213 plays a role of over dispersion, and avoids the high flow velocity of the heat exchange medium, so that the heat exchange medium is more effectively dispersed and filled in each channel of the fin; a splitter is provided in the trapezoidal transition zone 213 at the inlet end, and when the heat exchange medium enters the plate-fin heat exchanger 21 through the inlet tube, it encounters the splitter blades in the splitter, and can be effectively dispersed.
Furthermore, the thermoelectric module 22 has a sandwich structure, the P-type thermoelectric arms 221 and the N-type thermoelectric arms 222 are sequentially and alternately arranged and connected in series end to end through the Cu electrodes 223, and the thermoelectric module has the characteristics of small internal resistance, high output voltage and the like, and the ceramic substrates 224 are added on the upper and lower surfaces of the P-type thermoelectric arms 221 and the N-type thermoelectric arms 222 to play roles of supporting, protecting and insulating; in order to connect the thermoelectric module 22, the plate-fin heat exchanger 21 and the heat dissipation fins 23 by using a brazing connection method, a copper plate 225 is coated on the outer surfaces of the upper and lower ceramic substrates 224 of the thermoelectric module 22.
The specific working method of the invention is many, and the above description is only the preferred embodiment of the invention. It should be noted that the above examples are only for illustrating the present invention, and are not intended to limit the scope of the present invention. It will be apparent to those skilled in the art that various modifications can be made without departing from the principles of the invention and these modifications are to be considered within the scope of the invention.
Claims (9)
1. A micro-channel continuous catalytic device is characterized by comprising a reactor (1) and a waste heat recoverer (2); the reactor (1) comprises a reactor shell (11) and a plurality of reactor bodies (12), wherein the reactor bodies (12) are distributed in parallel and bundled in the reactor shell (11) with a single-pipe flow regulating valve (14) through soft and hard reducing joints (13); the reactor body (12) comprises an inner sleeve (121), an intermediate sleeve (122) and an outer sleeve (123), wherein the inner sleeve (121) and the intermediate sleeve (122) are both provided with internal threads and external threads, the outer sleeve (132) is provided with internal threads, a spiral circulation path formed between the outer wall of the inner sleeve (121) and the inner wall of the intermediate sleeve (122) is used as a reaction channel (124), and the left end and the right end of the reaction channel (124) are respectively provided with a reaction material inlet (1241) and a reaction material outlet (1242); the spiral flow path of the inner sleeve (121) is used as a first heat exchange medium channel (125), the spiral flow path formed between the outer wall of the middle sleeve (122) and the inner wall of the outer sleeve (123) is used as a second heat exchange medium channel (126), and the left end and the right end of the first heat exchange medium channel (125) and the second heat exchange medium channel (126) are respectively a heat exchange medium channel outlet (1251) and a heat exchange medium channel inlet (1252); the flow directions of the fluids in the reaction channel (124) and the heat exchange medium channel I (125) are opposite, and the flow directions of the fluids in the reaction channel (124) and the heat exchange medium channel II (126) are opposite; the waste heat recoverer (2) is connected with a heat exchange medium channel outlet (1251) of each reactor body (12) and is used for recovering waste heat of a heat exchange medium.
2. The microchannel continuous catalytic device according to claim 1, wherein the external thread of the inner sleeve (121) and the internal thread of the intermediate sleeve (122) are in opposite directions, and one thread is rotated clockwise and the other thread is rotated counterclockwise as viewed from one end of the reactor body (12).
3. The microchannel continuous catalytic device of claim 2, wherein the axial centerlines of the inner sleeve (121), the intermediate sleeve (122), and the outer sleeve (123) overlap.
4. The microchannel continuous catalytic device according to claim 1, wherein the waste heat recoverer (2) comprises a plate-fin heat exchanger (21), a thermoelectric module (22) and a heat dissipating fin (23); the left end and the right end of the plate-fin heat exchanger (21) are respectively provided with an inlet pipe (211) and an outlet pipe (212), the inlet pipe (211) is connected with a heat exchange medium channel outlet (1251) of each reactor body (12), and the outlet pipe (212) is connected with a discharge pipe; the upper surface and the lower surface of the plate-fin heat exchanger (21) are respectively provided with the thermoelectric modules (22) with the same number, and the outer side of each thermoelectric module (22) is provided with a radiating fin (23) for independent heat radiation.
5. The microchannel continuous catalytic device as set forth in claim 4, wherein the plate-fin heat exchanger (21) and the thermoelectric module (22) and the heat dissipating fin (23) are connected by brazing.
6. The microchannel continuous catalytic device as claimed in claim 5, wherein the plate-fin heat exchanger (21) has trapezoidal transition regions (213) at both ends and a square region (214) in the middle, the thermoelectric module (22) is arranged in the square region (214), rectangular folded fins are arranged inside the plate-fin heat exchanger (21) at corresponding positions of the square region (214), and the rectangular folded fin channels are in accordance with the flowing direction of the heat exchange medium; the trapezoidal transition regions (213) at the left end and the right end are respectively provided with an inlet (215) and an outlet (216), and the inlet (215) and the outlet (216) are respectively communicated with the inlet pipe (211) and the outlet pipe (212); and a flow dividing device (217) is arranged in the trapezoidal transition area (213) at the left end.
7. The microchannel continuous catalytic device according to claim 6, wherein the thermoelectric module (22) comprises a P-type thermoelectric leg (221), an N-type thermoelectric leg (222), a Cu electrode (223), a ceramic substrate (224), a copper plate (225); the P-type thermoelectric arms (221) and the N-type thermoelectric arms (222) are of a cubic structure, the P-type thermoelectric arms (221) and the N-type thermoelectric arms (222) are sequentially and alternately arranged and are connected in series end to end through Cu electrodes (223), ceramic substrates (224) are added to the upper surface and the lower surface of the P-type thermoelectric arms (221) and the N-type thermoelectric arms (222), and a layer of copper plate (225) covers the outer surface of each ceramic substrate (224).
8. The microchannel continuous catalytic device as claimed in claim 7, wherein the heat dissipation fins (23) are dense-teeth type heat dissipation fins, the heat dissipation fins (23) comprise a plurality of fins, the thickness of the fins is 1 mm, the spacing between the fins is 2 mm, the material of the fins is 3003 aluminum alloy, and the size of the heat dissipation fins (23) is larger than that of the thermoelectric module (22).
9. The method of operating a microchannel continuous catalytic device as set forth in any one of claims 1-8, comprising the steps of:
(1) the method comprises the following steps that pre-prepared materials obtain initial kinetic energy through a constant-flow pump, then flow into a spiral reaction channel (124) from a reaction material inlet (1241), continuously collide in the spiral reaction channel (124) in the flowing process of the materials, continuously mix, separate and remix under the action of centrifugal force, and repeatedly shear and cross-flow;
(2) in the process of spiral flowing of materials, a heat exchange medium channel I (125) of the inner sleeve (121), a heat exchange medium channel II (126) formed between the outer wall of the intermediate sleeve (122) and the inner wall of the outer sleeve (123) continuously flow in the outer sleeve (123) from a heat exchange medium channel inlet (1252), and simultaneously continuously wash the surfaces of the heat exchange medium channel I (125) and the heat exchange medium channel II (126), and flow in the waste heat recoverer (2) from a heat exchange medium channel outlet (1251) for recovering waste heat of the heat exchange medium;
(3) the number of reactor bodies (12) in the reactor shell (11) to be put into use is adjusted through a single-pipe flow adjusting valve (14).
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| WO2024065074A1 (en) * | 2022-09-26 | 2024-04-04 | 广东莱佛士制药技术有限公司 | Dynamic combined micro-channel continuous flow reactor |
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