CN220780250U - Layered catalyst carrying device and fixed bed reactor - Google Patents
Layered catalyst carrying device and fixed bed reactor Download PDFInfo
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- CN220780250U CN220780250U CN202322333071.0U CN202322333071U CN220780250U CN 220780250 U CN220780250 U CN 220780250U CN 202322333071 U CN202322333071 U CN 202322333071U CN 220780250 U CN220780250 U CN 220780250U
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- 239000003054 catalyst Substances 0.000 title claims abstract description 67
- 239000002184 metal Substances 0.000 claims abstract description 83
- 238000006243 chemical reaction Methods 0.000 claims abstract description 37
- 239000002245 particle Substances 0.000 claims abstract description 14
- 239000000463 material Substances 0.000 claims description 6
- 239000002994 raw material Substances 0.000 abstract description 14
- 239000000376 reactant Substances 0.000 abstract description 7
- 239000011949 solid catalyst Substances 0.000 abstract description 6
- 230000003197 catalytic effect Effects 0.000 abstract description 4
- 238000009991 scouring Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 9
- 230000008569 process Effects 0.000 description 7
- 239000007791 liquid phase Substances 0.000 description 5
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 3
- 238000003786 synthesis reaction Methods 0.000 description 3
- YNAVUWVOSKDBBP-UHFFFAOYSA-N Morpholine Chemical compound C1COCCN1 YNAVUWVOSKDBBP-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000006555 catalytic reaction Methods 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000012466 permeate Substances 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
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- Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
Abstract
The utility model provides a catalyst carrying device and a fixed bed reactor, and relates to the technical field of catalytic devices. The catalyst carrying device comprises a plurality of layers of metal net cages which are overlapped up and down, each layer of metal net cage comprises a plurality of carrying cavities which are horizontally distributed and a plurality of vacancies, and the carrying cavities of the metal net cages of the upper layer are overlapped with the vacancies of the metal net cage of the lower layer in the up-down direction. The particles of the solid catalyst are filled in the carrying cavity layer by layer, the carrying position of the catalyst particles can be fixed due to the thinner thickness of the carrying cavity, the catalyst particles are prevented from being locally accumulated under the flowing scouring of the reaction raw materials, the catalyst and reactants are ensured to be fully contacted, and compared with a common metal cage, the yield of the reaction can be effectively improved.
Description
Technical Field
The utility model relates to the technical field of catalytic devices, in particular to a layered catalyst carrying device and a fixed bed reactor.
Background
With the development of the chemical synthesis field, the form of the catalyst used in the chemical synthesis reaction tends to be diversified. The solid catalyst has various shapes and smaller particle size.
In the process of gas-liquid phase reaction by using a fixed bed reactor, the solid catalyst is carried on a common columnar metal cage (the inside is not layered), and is flushed along with the flow of reaction raw materials, so that the solid catalyst can be flushed together, and the reaction cavity is blocked due to excessive stacking. This also results in poor dispersion of the catalyst and very uneven contact of the catalyst with the reactants at different locations in the reaction chamber: the contact point between the reactant and the catalyst in the reaction cavity is reduced, and a part of the reactant directly flows away even without contacting the catalyst, so that the reaction efficiency is low.
Disclosure of Invention
Aiming at the defects of the prior art, the utility model aims to provide a layered catalyst carrying device and a fixed bed reactor, which can avoid the problem of low reaction efficiency caused by the blockage of a catalyst in a reaction cavity.
In order to achieve the above object, the present utility model is realized by the following technical scheme:
in a first aspect, the layered catalyst carrying device provided by the utility model comprises a plurality of layers of metal net cages which are overlapped up and down, each layer of metal net cage comprises a plurality of carrying cavities and a plurality of vacancies which are horizontally distributed, and the carrying cavities of the metal net cages on the upper layer and the vacancies of the metal net cages on the lower layer are overlapped up and down.
Optionally, the metal net cage is in a shape of a round cake and is divided into an even number of sector column areas with the same size, wherein half of the sector column areas are carrying cavities, and gaps of the sector column areas are reserved between every two carrying cavities.
Optionally, the metal net cage comprises a frame at the periphery, the frame is a metal sheet surrounding a cylinder, the frame comprises a plurality of carrying cavities, the upper surface, the lower surface and the inner side of the carrying cavities are formed by metal nets, and the outer side of the carrying cavities is the metal sheet of the frame.
Optionally, the empty space inside the metal mesh cage is a space position between adjacent carrying cavities.
Optionally, the below of carrying on the lateral surface in chamber is connected with buckle A, and the internal surface of vacancy department outside frame is connected with buckle B, and buckle B can lock with buckle A and be connected into a whole, and can dismantle.
In a second aspect, the present utility model provides a fixed bed reactor comprising the layered catalyst loading apparatus described above.
Optionally, the outer contour of the metal mesh cage is the same as the contour of the inner wall of the reaction chamber of the fixed bed reactor.
The beneficial effects of the utility model are as follows:
1. the layered catalyst carrying device provided by the utility model has a detachable layered structure, the particles of the solid catalyst are filled in the carrying cavity layer by layer, the carrying position of the catalyst particles can be fixed due to the thinner thickness of the carrying cavity, the catalyst particles are prevented from being locally accumulated under the flowing flushing of the reaction raw materials, and the catalyst and reactants are ensured to be fully contacted.
2. The layered catalyst carrying device provided by the utility model comprises a plurality of layers, the number of layers can be increased or reduced according to the process requirement, and the addition amount of the catalyst can be flexibly adjusted. The amount of catalyst is thus relatively reduced, as the catalyst is in sufficient contact with the reactants.
3. The layered catalyst carrying device provided by the utility model comprises the vacancies, is favorable for the passing of materials with higher viscosity, and is dispersed by the metal mesh after the reducing gas enters the vacancies, so that the reducing gas permeates and has a large contact surface, the catalyst can recover the catalytic activity more quickly, and the yield of the reaction can be effectively improved compared with the common metal cage.
Drawings
The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model.
In the figure: the mutual spacing or dimensions are exaggerated for the purpose of showing the positions of the various parts, and the schematic illustrations are used for illustration only.
Fig. 1 is a schematic structural view of a layered catalyst-carrying apparatus according to an embodiment of the present utility model.
The metal net cage comprises a metal net cage body 1, a metal net cage 11, a metal net cage body 12, a metal net cage body 2, a carrying cavity 3, a vacancy 4, a frame 6, a buckle A, a buckle 7 and a buckle B.
Detailed Description
The utility model will be further described with reference to the drawings and examples.
Example 1:
as shown in fig. 1, the layered catalyst loading device provided in this embodiment includes multiple layers of metal wire cages 1 stacked up and down, each layer of metal wire cage 1 includes a plurality of loading cavities 2 and a plurality of vacancies 3 that are distributed horizontally, the loading cavity 2 of the metal wire cage 11 of the upper layer and the vacancy 3 of the metal wire cage 12 of the lower layer overlap in the up-down direction, and the vacancy 3 of the metal wire cage 11 of the upper layer and the loading cavity 2 of the metal wire cage 11 of the lower layer overlap in the up-down direction.
The solid catalyst particles are filled in the carrying cavity 2 layer by layer, the thickness of the carrying cavity 2 in the height direction is thinner, the carrying positions of the catalyst particles can be fixed, the catalyst particles are prevented from being locally accumulated under the flowing flushing of the reaction raw materials, and the catalyst is ensured to be fully contacted with reactants; the vacancy 3 area is arranged at the same time, the flow of the reaction raw material in the area has no resistance, and when the reaction raw material simultaneously comprises a gas phase and a liquid phase, the flow resistance of the reaction raw material can be integrally reduced because the catalyst is lapped on the cross section of the device and simultaneously comprises the carrying cavity 2 and the vacancy 3; the carrying cavity 2 of the upper and lower metal net cages 1 is overlapped with the empty space 3 in the height direction.
The number of the metal netpen 1 is even, so that the contact time of the reaction raw materials and the catalyst in each region is not reduced.
The metal net cage 1 is in a round cake shape and is divided into an even number of sector column areas with the same size, wherein half of the sector column areas are carrying cavities 2, and each two carrying cavities 2 are separated by a vacancy 3 of the sector column area.
Alternatively, as shown in A-A of fig. 1, the metal net cage 1 is divided into 6 sector column areas with the same size, the angle of each sector is 60 degrees, wherein three sector column areas are carrying cavities 2, and the other three sector column areas are empty spaces 3.
The metal net cage 1 comprises a frame 4 at the periphery, the frame 4 is a metal sheet which is surrounded into a cylinder shape, the frame 4 comprises a plurality of carrying cavities 2, the upper surface, the lower surface and the inner side surface of the carrying cavities 2 are formed by metal nets, and the outer side surface of the carrying cavities 2 is the metal sheet of the frame 4; the metal mesh can provide the maximum flow resistance of the reaction raw material with respect to the screen plate by reducing the passing area.
Optionally, the metal sheet and the metal net are made of the same material, and optionally, 316L can meet the corrosion resistance and high temperature resistance requirements of most catalytic reactions.
Optionally, the metal mesh on the upper surface of the carrying cavity 2 can be opened for adding catalyst particles, so that the adding amount of the catalyst particles of each layer can be independently adjusted.
The empty space 3 inside the metal net cage 1 is the interval position between the adjacent carrying cavities 2, namely: the empty space 3 does not comprise a metal net, which is beneficial to reducing the flow resistance of the reaction raw materials, avoiding forming a relatively closed channel between catalyst gaps along with the reaction, and adjusting the radial distribution of the flow velocity in the metal net cage 1 to be consistent.
A buckle A6 is connected below the frame of the outer side surface of the carrying cavity 2, a buckle B7 is connected with the inner surface of the outer side frame at the position of the empty space 3, and the buckle B7 and the buckle A6 can be buckled and connected into a whole and can be detached; therefore, the number of layers can be increased or reduced according to the process requirement, and the addition amount of the catalyst can be flexibly adjusted; since the empty space 3 does not comprise a metal mesh part, it is possible to arrange the snap-fit therein without affecting the outer contour of the metal mesh cage 1.
Optionally, the buckle B7 is a groove fixed on the inner surface of the frame 4 at the position of the vacancy 3, and the inner side at the inlet of the groove is provided with a first protruding structure; the buckle A6 is an inserting tongue fixed below the frame 4 of the carrying cavity 2, and the inserting tongue is provided with a second protruding structure; when the inserting tongue is inserted into the groove, the second protruding structure and the first protruding structure can be blocked mutually, and force is required to be applied to the inserting direction, so that the buckle B7 and the buckle A6 can be elastically deformed to a certain extent to enable the inserting tongue to be inserted into the groove; after the inserting tongue is inserted into the groove, the second protruding structure and the first protruding structure are blocked mutually to prevent the buckle B7 from separating from the buckle A6, so that the upper metal net cage 11 and the lower metal net cage 12 are inserted together, the positions are relatively fixed, and no gap exists between the upper bottom edge and the lower bottom edge of the frame 4; in the process of pulling out the plug tongue, the plug tongue also needs to apply force to the pulling-out direction, so that the buckle B7 and the buckle A6 can be elastically deformed to a certain extent to pull out the plug tongue from the groove;
the using method is as follows:
selecting a layered catalyst carrying device suitable for the outline of a reaction cavity of a fixed bed reactor, opening the upper surface of a carrying cavity 2 of each layer of metal net cage 1, filling catalyst, uniformly distributing catalyst particles in the carrying cavity 2, and closing the metal net on the upper surface.
The metal net cage 1 of the multiple layers is combined with the buckle A6 through the buckle B7, and the buckle A6 is arranged below the carrying cavity 2 because the buckle B7 is arranged in the area of the empty space 3, so that after the assembly is completed, the carrying cavity 2 of the metal net cage 11 of the upper layer and the empty space 3 of the metal net cage 12 of the lower layer can be overlapped naturally in the up-down direction, and the state of fig. 1 is formed.
Example 2:
this example provides a fixed bed reactor in which the layered catalyst loading apparatus of example 1 is installed.
Optionally, the peripheral outline of the metal net cage 1 is the same as the outline of the inner wall of the reaction cavity of the fixed bed reactor, so that the frame 4 of the metal net cage 1 is tightly attached to the inner wall of the reaction cavity, and the reaction raw materials are prevented from flowing along the gap outside the frame 4 and are not contacted with the catalyst.
Taking the process of synthesizing morpholine in a fixed bed reactor as an example, the raw materials are diethylene glycol in liquid phase and liquid ammonia in liquid phase, and under the condition of introducing protective gas and reducing gas, the liquid phase raw materials are viscous and have large flow resistance.
The catalyst is reduced before synthesis, the reduction temperature is about 300 ℃, the temperature of 220 ℃ is required to be reached in the catalytic reaction process, and the pressure in the cavity reaches 2Mpa; the difference in reaction yield in the fixed bed reactor equipped with the generally cylindrical metal cage and the fixed bed reactor equipped with the catalyst loading device in this example was tested under the condition that the reaction flow path was not changed.
The structure of the common columnar metal cage is a cylindrical cup-shaped metal net structure, the inside of the metal cage is not layered, the height of the metal cage is the same as the total height of the layered catalyst carrying device in the embodiment, the metal cage only plays a role in carrying a catalyst, and the material is 316L.
Wherein, control group 1 and control group 2 used the common columnar metal cage, experimental group 1 and experimental group 2 used the layered catalyst loading device in this example, and in the same-sized reaction chamber, the reaction was performed based on the same reaction conditions, the same raw materials and catalyst components/specifications, and the yield was calculated.
The reaction yields for the different experiments are shown in table 1.
TABLE 1
| Device and method for controlling the same | Reaction yield (%) | |
| ControlGroup 1 | Common columnar metal cage | 93.68 |
| Control group 2 | Common columnar metal cage | 94.02 |
| Experiment group 1 | Catalyst loading device | 98.75 |
| Experiment group 2 | Catalyst loading device | 98.62 |
As can be seen from the above experimental data, the reaction yield of the layered catalyst loading apparatus of this embodiment is significantly higher than that of the conventional columnar metal cage. Compared with a common metal cage, the layered catalyst carrying device of the embodiment has the advantages that the amount of the carried catalyst is reduced, but the contact area between materials and the catalyst is greatly increased. The catalyst catalyzing material reaction process and the reducing gas introducing process need to be performed simultaneously, and because the catalyst contact area of the layered catalyst carrying device of the embodiment is relatively large and each layer is relatively uniform, the reducing gas permeates and has a large contact surface, the catalyst can recover the catalytic activity relatively quickly, and compared with a common metal cage, the catalyst can effectively improve the reaction yield.
The foregoing description is only of the preferred embodiments of the present application and is not intended to limit the same, but rather, various modifications and variations may be made by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.
Claims (10)
1. The layered catalyst carrying device is characterized by comprising a plurality of layers of metal net cages which are overlapped up and down, wherein each layer of metal net cage comprises a plurality of carrying cavities which are horizontally distributed and a plurality of vacancies, and the carrying cavities of the metal net cage on the upper layer are overlapped with the vacancies of the metal net cage on the lower layer in the up-down direction.
2. The layered catalyst loading apparatus according to claim 1, wherein the metal cage is in the shape of a circular cake divided into an even number of sector column regions of the same size, wherein half of the sector column regions are loading chambers, and each two loading chambers are separated by a space of the sector column regions.
3. The layered catalyst loading apparatus according to claim 2, wherein the metal cage is divided into a plurality of sector column regions of the same size, each sector having an angle of 60 °, wherein three sector column regions are loading chambers and the other three sector column regions are empty spaces.
4. The layered catalyst mounting device according to claim 1, wherein the metal cage includes a frame having an outer periphery, the frame being a metal sheet surrounded in a cylindrical shape, the upper and lower surfaces and the inner side surfaces of the mounting chamber being composed of metal mesh, and the outer side surface of the mounting chamber being the metal sheet of the frame.
5. The layered catalyst-supporting apparatus according to claim 4, wherein the metal sheet and the metal mesh are made of the same material.
6. The layered catalyst loading apparatus according to claim 4, wherein the metal mesh on the upper surface of the loading chamber is openable for adding catalyst particles.
7. The layered catalyst loading apparatus according to claim 1, wherein the empty space inside the metal cage is a space between adjacent loading chambers.
8. The layered catalyst mounting device according to claim 1, wherein a buckle a is connected below an outer side surface of the mounting chamber, a buckle B is connected to an inner surface of the outer frame at the empty position, and the buckle B and the buckle a can be buckled and connected into a whole and are detachable.
9. A fixed bed reactor comprising a layered catalyst-carrying device according to any one of claims 1 to 8.
10. The fixed bed reactor as claimed in claim 9, wherein the outer contour of the metal mesh cage is identical to the contour of the inner wall of the reaction chamber of the fixed bed reactor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322333071.0U CN220780250U (en) | 2023-08-29 | 2023-08-29 | Layered catalyst carrying device and fixed bed reactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322333071.0U CN220780250U (en) | 2023-08-29 | 2023-08-29 | Layered catalyst carrying device and fixed bed reactor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220780250U true CN220780250U (en) | 2024-04-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202322333071.0U Active CN220780250U (en) | 2023-08-29 | 2023-08-29 | Layered catalyst carrying device and fixed bed reactor |
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- 2023-08-29 CN CN202322333071.0U patent/CN220780250U/en active Active
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