CN117680054A - Double-particle reactor and method for improving fluidization effect of ultrafine powder particles - Google Patents
Double-particle reactor and method for improving fluidization effect of ultrafine powder particles Download PDFInfo
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Abstract
The invention discloses a double-particle reactor and a method for improving fluidization effect of ultrafine powder particles, and relates to the technical field of chemical industry, wherein the double-particle reactor comprises a reactor main body, a gas-solid separator and a solid phase conveying pipeline, wherein the reactor main body is provided with a mixing reaction section and a conveying reaction section which are communicated and have the diameter ratio larger than 1, the mixing reaction section is provided with at least one gas distributor, and optionally, the mixing reaction section is internally provided with inner members in different forms; the solid phase conveying pipeline is communicated with the conveying reaction section through a gas-solid separator. Therefore, the method for improving the fluidization effect of the ultrafine powder particles reduces abnormal fluidization by adding fluidization assisting particles into the mixing reaction section, adapts to various reaction requirements in the mixing reaction section by arranging different types of internal components, and simultaneously automatically adjusts the reaction time and apparent gas velocity in the conveying reaction section by the mixing reaction section and the conveying reaction section which are communicated in a reducing way.
Description
Technical Field
The invention relates to the technical field of chemical industry, in particular to a double-particle reactor and a method for improving fluidization effect of ultrafine powder particles.
Background
Ultrafine particles are generally referred to as Geldart C-type particles having a particle size of less than 30. Mu.m. As the superfine powder particles have the advantages of large specific surface area and the like, the superfine powder particles have important application values in the fields of foods, medicines, energy, advanced materials and the like. For example, in the field of advanced materials, composites of graphite and silicon are one of the ideal choices for negative electrode materials for high specific energy battery systems. The deposition of gaseous silicon compounds on porous graphite ultrafine particles by using a gas-solid fluidized bed vapor deposition reactor is an effective means for large-scale production of graphite-silicon composite materials.
However, as the particle size of the particles decreases, the intermolecular force increases, the inter-particle viscosity increases, and the fluidization performance thereof is remarkably deteriorated, and when the ultrafine powder particles are directly used for fluidization in a fluidized bed, abnormal fluidization phenomena such as slugging, channeling, agglomeration and the like occur, affecting the fluidization performance thereof.
Disclosure of Invention
The invention aims to provide a double-particle reactor and a method for improving the fluidization effect of ultrafine powder particles, which solve the problem that abnormal fluidization phenomena such as slugging, channeling, agglomeration and the like occur when ultrafine powder particles are directly used for fluidization in the prior art, thereby influencing the fluidization performance of the ultrafine powder particles.
The above object of the present invention can be achieved by the following technical solutions:
the present invention provides a double particle reactor for improving fluidization effect of ultrafine powder particles, comprising:
the reactor comprises a reactor main body, a reaction mixing section and a reaction conveying section, wherein the reaction mixing section and the reaction conveying section are communicated, the diameter of the reaction mixing section is larger than that of the reaction conveying section, at least one gas distributor is arranged at the bottom of the reaction mixing section, a feed pipe is communicated with the reaction mixing section, and the feed pipe is arranged above the gas distributor;
the gas-solid separator is provided with a hollow body, a feed inlet, a first outlet for guiding out gas and a second outlet for guiding out solid are arranged on the body, and the feed inlet is communicated with the conveying reaction section;
the solid phase conveying pipeline is provided with a circulating pipeline, a collecting pipeline and a control valve, the circulating pipeline is used for communicating the second outlet of the gas-solid separator with the mixing reaction section through the control valve, and the collecting pipeline is communicated with the circulating pipeline through the control valve;
when the solid-phase product separated by the gas-solid separator meets the preset requirement, the control valve communicates the collecting pipeline with the circulating pipeline;
when the solid-phase product separated by the gas-solid separator does not meet the preset requirement, the control valve is used for communicating the circulating pipeline with the mixing reaction section.
In a specific embodiment, the ratio of the diameter of the mixing reaction section to the diameter of the transport reaction section is 1.5 to 5.
In a specific embodiment, the apparent gas velocity in the mixed reaction section is 0.02 m/s-2 m/s, and the apparent gas velocity in the conveying reaction section is 1 m/s-10 m/s.
In a specific embodiment, the gas distributor is a gas distribution plate with an aperture ratio of 0.25% -2%, or the gas distributor is an annular gas distribution pipe with an aperture ratio of 0.25% -2%.
In a specific embodiment, a central guide cylinder is arranged in the mixing reaction section, and the ratio of the diameter of the mixing reaction section to the diameter of the central guide cylinder is 1.2-3.
And the central guide cylinder divides the mixing reaction section into a central guide area and an outer annular space area along the radial direction of the mixing reaction section.
In a specific embodiment, the bottom of the mixing reaction section is provided with a plurality of gas distributors, wherein at least two gas distributors are respectively arranged below the central diversion area and the outer annular space area.
In a specific embodiment, a plurality of baffles are disposed in the mixing reaction section, and the baffles are disposed at intervals in a direction from the mixing reaction section to the conveying reaction section.
In a specific embodiment, at least one venturi tube is arranged in the mixing reaction section, and the axial direction of at least one venturi tube is parallel to the axial direction of the mixing reaction section.
In a specific embodiment, the control valve is a three-way valve arranged at the communication position of the collecting pipeline and the circulating pipeline, or the control valve is a first switch valve and a second switch valve respectively arranged on the circulating pipeline and the collecting pipeline.
A method for improving the fluidization of ultrafine particles, said method being implemented using a double particle reactor for improving fluidization of ultrafine particles as described above, comprising the steps of:
opening a feed supply of a feed pipe, and introducing a mixture of ultrafine powder particles and fluidization assisting particles into the mixing reaction section, wherein the mass fraction of the fluidization assisting particles is 2% -15%;
starting gas phase supply of a gas distributor, introducing fluidizing gas and reaction raw material gas into the mixed reaction section, and adjusting the introducing amount of the fluidizing gas to enable the apparent gas velocity in the mixed reaction section to be in a bubbling bed state or a turbulent bed state;
when the solid-phase product separated by the gas-solid separator meets the preset requirement, the control valve communicates the collecting pipeline with the circulating pipeline, and the solid-phase product is led out from the collecting pipeline; when the solid-phase product separated by the gas-solid separator does not meet the preset requirement, the control valve is used for communicating the circulating pipeline with the mixing reaction section and sending the solid-phase product back to the mixing reaction section for continuous reaction.
The invention has the characteristics and advantages that:
1. according to the double-particle reactor for improving the fluidization effect of ultrafine powder particles, through the arrangement of the mixing reaction section and the conveying reaction section with the diameter ratio larger than 1, the apparent gas velocity entering the conveying reaction section through the mixing reaction section is automatically adjusted, and then the solid-phase product is brought out of the mixing reaction section.
2. According to the double-particle reactor for improving the fluidization effect of ultrafine powder particles, provided by the invention, the circulating pipe selectively communicated with the mixing reaction section is arranged, so that solid-phase products which do not meet the preset requirements can be conveniently returned to the mixing reaction section for internal circulation reaction, and the quality control of the solid-phase products is realized.
3. The double-particle reactor for improving the fluidization effect of ultrafine powder particles is adaptive to various reaction requirements in a mixing reaction section by arranging different types of internal components such as a central guide cylinder, a baffle plate, a venturi tube and the like.
4. The method for improving the fluidization effect of the ultrafine powder particles realizes the improvement of the fluidization performance of the ultrafine powder particles by regulating and controlling the mixing proportion of the ultrafine powder particles and the fluidization assisting particles, and reduces the occurrence of abnormal fluidization phenomena such as slugging, channeling, agglomeration and the like.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of a double particle reactor without internals for improving fluidization of ultrafine particles according to the present invention;
FIG. 2 is a schematic structural view of a double particle reactor containing a center guide shell for improving fluidization of ultrafine powder particles according to the present invention;
FIG. 3 is a schematic view of a double particle reactor containing baffles to improve fluidization of ultrafine particles according to the present invention;
fig. 4 is a schematic structural view of a venturi included in the dual particle reactor for improving fluidization of ultrafine particles according to the present invention.
Reference numerals illustrate:
1. a reactor body; 11. a mixing reaction section; 12. conveying the reaction section; 13. a diameter-reducing structure;
2. a gas distributor;
3. a feed pipe;
4. a gas-solid separator; 40. a body; 41. a feed inlet; 42. a first outlet; 43. a second outlet;
5. a solid phase transport line; 51. a circulation line; 52. a collecting pipeline; 53. a control valve;
6. a central guide cylinder; 61. a central flow guiding region; 62. an outer annular space region;
7. a baffle;
8. a venturi tube;
d1, diameter of a mixing reaction section;
d2, conveying the diameter of the reaction section;
and D3, diameter of the central guide cylinder.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As shown in fig. 1 to 4, the present invention provides a double particle reactor for improving fluidization of ultrafine powder particles, comprising:
the reactor comprises a reactor main body 1, a reaction mixing section 11 and a reaction conveying section 12, wherein the reaction mixing section 11 and the reaction conveying section 12 are communicated, the diameter of the reaction mixing section 11 is larger than that of the reaction conveying section 12, at least one gas distributor 2 is arranged at the bottom of the reaction mixing section 11, a feed pipe 3 is communicated with the reaction mixing section 11, and the feed pipe 3 is arranged above the gas distributor 2;
the gas-solid separator 4 is provided with a hollow body 40, a feed inlet 41, a first outlet 42 for leading out gas and a second outlet 43 for leading out solid are arranged on the body 40, and the feed inlet 41 is communicated with the conveying reaction section 12;
the solid phase conveying pipeline 5 is provided with a circulating pipeline 51, a collecting pipeline 52 and a control valve 53, wherein the circulating pipeline 51 is communicated with the second outlet 43 of the gas-solid separator 4 and the mixed reaction section 11 through the control valve 53, and the collecting pipeline 52 is communicated with the circulating pipeline 51 through the control valve 53;
when the solid-phase product separated by the gas-solid separator 4 meets the preset requirement, the control valve 53 communicates the collecting pipeline 52 with the circulating pipeline 51;
when the solid-phase product separated by the gas-solid separator 4 does not meet the preset requirement, the control valve 53 communicates the circulation line 51 with the mixing reaction section 11.
According to the double-particle reactor for improving the fluidization effect of ultrafine powder particles, through the arrangement of the mixing reaction section 11 and the conveying reaction section 12 with the diameter ratio larger than 1, the apparent gas velocity entering the conveying reaction section 12 through the mixing reaction section 11 is automatically regulated, and then a solid-phase product is carried out from the mixing reaction section 11; meanwhile, by arranging the circulating pipe which is selectively communicated with the mixing reaction section 11, the solid-phase product which does not meet the preset requirement is conveniently returned into the mixing reaction section 11 to continue the reaction.
Specifically, as shown in fig. 1 to 4, the double-particle reactor for improving fluidization effect of ultrafine particles comprises a reactor main body 1, a gas-solid separator 4 and a solid phase conveying pipeline 5, wherein the reactor main body 1 is provided with a mixing reaction section 11 and a conveying reaction section 12 which are communicated, the diameter of the mixing reaction section 11 is larger than that of the conveying reaction section 12, a reducing structure 13 is formed at the communication position of the mixing reaction section 11 and the conveying reaction section 12, at least one gas distributor 2 is arranged at the bottom of the mixing reaction section 11, a feeding pipe 3 communicated with the mixing reaction section 11 is arranged on the mixing reaction section 11, the feeding pipe 3 is arranged above the gas distributor 2, namely from the mixing reaction section 11 to the conveying reaction section 12, at least one gas distributor 2 is arranged at the upstream end of the mixing reaction section 11, and the feeding pipe 3 communicated with the mixing reaction section 11 is arranged at the downstream of the gas distributor 2. In this embodiment, a feed pipe 3 is used for feeding of ultrafine powder particles and glidant particles.
The gas-solid separator 4 has a hollow body 40, and the body 40 is provided with a feed port 41 communicating with the transport reaction section 12, a first outlet 42 for discharging gas, and a second outlet 43 for discharging solids. In this embodiment, a filter is connected to the first outlet 42 for further separation of the non-separated solid phase product.
The solid phase conveying pipeline 5 is provided with a circulating pipeline 51, a collecting pipeline 52 and a control valve 53, wherein the circulating pipeline 51 is communicated with the second outlet 43 of the gas-solid separator 4 and the mixed reaction section 11 through the control valve 53, the collecting pipeline 52 is communicated with the circulating pipeline 51 through the control valve 53, namely the circulating pipeline 51 is selectively communicated with the mixed reaction section 11 or the collecting pipeline 52 through the control valve 53, and when a solid phase product separated by the gas-solid separator 4 meets preset requirements, the circulating pipeline 51 is communicated with the collecting pipeline 52 through the control valve 53; when the solid-phase product separated by the gas-solid separator 4 does not meet the preset requirement, the control valve 53 communicates the circulation line 51 with the mixing reaction section 11.
According to one embodiment of the invention, the ratio of the diameter of the mixing reaction section 11 to the diameter of the transport reaction section 12 is 1.5 to 5.
In this embodiment, the reducing structure 13 from the mixing reaction section 11 to the conveying reaction section 12 automatically increases the apparent gas velocity in the conveying reaction section 12, and further, the solid-phase product is conveyed.
Specifically, as shown in fig. 1, the ratio between the diameter D1 of the mixing reaction section 11 and the diameter D2 of the conveying reaction section 12 is in the range of 1.5 to 5, that is, the ratio of the diameter of the upstream end to the diameter of the downstream end of the reducing structure 13 is in the range of 1.5 to 5 in the direction from the mixing reaction section 11 to the conveying reaction section 12.
According to one embodiment of the present invention, the superficial gas velocity in the mixing reaction section 11 is 0.02m/s to 2m/s, and the superficial gas velocity in the transport reaction section 12 is 1m/s to 10m/s.
In this embodiment, the diameter reduction of the mixing reaction section 11 and the conveying reaction section 12 can increase the apparent gas velocity in the conveying reaction section 12 to 1m/s to 10m/s, and the increased apparent gas velocity is higher than the vertical conveying velocity of the solid phase product, thereby realizing the conveying of the solid phase product.
Specifically, the apparent gas velocity reaching the conveying reaction section 12 from the mixing reaction section 11 through the diameter reducing structure 13 is automatically increased from 0.02m/s to 2m/s to 1m/s to 10m/s.
According to one embodiment of the present invention, the gas distributor 2 is a gas distribution plate having an aperture ratio of 0.25% to 2%, or the gas distributor 2 is an annular gas distribution pipe having an aperture ratio of 0.25% to 2%.
In this embodiment, sufficient fluidization of the ultrafine powder particles is achieved by providing a gas distributor with an open area of 0.25% to 2%.
Specifically, the gas distributor 2 arranged at the bottom of the mixing reaction section 11 is a gas distribution plate or an annular gas distribution pipe with an aperture ratio of 0.25% -2%.
According to an embodiment of the present invention, the control valve 53 is a three-way valve provided at a communication portion between the collection pipe 52 and the circulation pipe 51, or the control valve 53 is a first switching valve and a second switching valve provided on the circulation pipe 51 and the collection pipe 52, respectively.
In this embodiment, the control valve 53 is variously selected and arranged, and is easy to manufacture.
Specifically, the control valve 53 is a three-way valve disposed at a communication position between the collecting pipeline 52 and the circulating pipeline 51, or the control valve 53 is a first switch valve and a second switch valve disposed on the circulating pipeline 51 and the collecting pipeline 52 respectively, and the first switch valve is disposed at an upstream section of the communication position between the collecting pipeline 52 and the circulating pipeline 51, or the first switch valve is disposed at a downstream section of the communication position between the collecting pipeline 52 and the circulating pipeline 51 along the conveying direction of the solid-phase product in the circulating pipeline 51. In the present embodiment, as shown in fig. 1 to 4, the control valve 53 is a three-way valve provided at a communication position of the collection pipe 52 and the circulation pipe 51.
According to one embodiment of the present invention, as shown in fig. 2, the mixing reaction section 11 is provided with a central guide cylinder 6, and the ratio of the diameter of the mixing reaction section 11 to the diameter of the central guide cylinder 6 is 1.2-3.
In this embodiment, the substances in the double particle reactor circulate inside the central guide cylinder 6 and in the cavity formed by the mixing reaction section 11 and the outer wall of the central guide cylinder 6, enhancing the mixing effect.
Specifically, as shown in fig. 2, the mixing reaction section 11 is provided with a central guide cylinder 6, and the ratio between the diameter D1 of the mixing reaction section 11 and the diameter D3 of the central guide cylinder 6 is 1.2-3.
Further, in the radial direction of the mixing reaction section 11, the central guide cylinder 6 divides the mixing reaction section 11 into a central guide zone 61 and an outer annular gap zone 62.
In this embodiment, the material within the dual particle reactor circulates between the central deflector zone 61 and the outer annular space zone 62.
Specifically, as shown in fig. 2, in the radial direction of the mixing reaction section 11, the inside of the central guide cylinder 6 forms a central guide area 61, and the annular space between the outside of the central guide cylinder 6 and the mixing reaction section 11 forms an outer annular space area 62.
According to one embodiment of the invention, the bottom of the mixing reaction section 11 is provided with a plurality of gas distributors 2, wherein at least two gas distributors 2 are arranged below the central flow guiding zone 61 and the outer annular space zone 62.
In this embodiment, the materials in the dual particle reactor are circulated in a substantially orderly manner along a certain path between the central guide zone 61 and the outer annular space zone 62 by controlling the apparent gas velocities of the central guide zone 61 and the outer annular space zone 62, respectively.
Specifically, as shown in fig. 2, the bottom of the mixing reaction section 11 is provided with a plurality of gas distributors 2, wherein at least two gas distributors 2 are respectively arranged below the central flow guiding region 61 and the outer annular space region 62, that is, the gas distributors 2 capable of independently adjusting the apparent gas velocities of the central flow guiding region 61 and the outer annular space region 62 are respectively arranged below the central flow guiding region 61 and the outer annular space region 62. In this embodiment, the circulation path of the material in the double particle reactor between the central flow guiding zone 61 and the outer annular space zone 62 is shown by the arrows in fig. 2.
According to one embodiment of the present invention, as shown in fig. 3, a plurality of baffles 7 are disposed in the mixing reaction section 11, and the plurality of baffles 7 are disposed at intervals from the mixing reaction section 11 to the conveying reaction section 12.
In this embodiment, the larger size but less dense glidant particles within the mixing reaction section 11 are retained by interception to be reused within the mixing reaction section 11.
Specifically, as shown in fig. 3, a plurality of baffles 7 are arranged at intervals from the mixing reaction section 11 to the conveying reaction section 12, wherein the baffles 7 are selected from a grid type or a packing type, and the invention is not limited to the above. In this embodiment, the baffles 7 are grille type, the number is 2-10, and the directions of the openings of two adjacent baffles 7 are staggered.
According to one embodiment of the present invention, as shown in fig. 4, at least one venturi tube 8 is provided in the mixing reaction section 11, and the axial direction of the at least one venturi tube 8 is parallel to the axial direction of the mixing reaction section 11.
In this embodiment, the larger size but less dense fluidization aid particles in the partially mixed reaction zone 11 may be pumped out as desired.
Specifically, as shown in fig. 4, from the mixing reaction section 11 to the conveying reaction section 12, at least one venturi tube 8 is provided at a downstream section of the mixing reaction section 11, and an axial direction of the venturi tube 8 is parallel to an axial direction of the mixing reaction section 11. In this embodiment, the number of venturi tubes 8 is 1 to 10, and the venturi tubes are arranged in the mixing reaction section 11 in a single tube or multiple tubes connected in parallel.
A method for improving the fluidization of ultrafine particles, the method being implemented using a double particle reactor for improving fluidization of ultrafine particles as described above, comprising the steps of:
opening the feeding supply of the feeding pipe 3, and introducing a mixture of ultrafine powder particles and fluidization assisting particles into the mixing reaction section 11, wherein the mass fraction of the fluidization assisting particles is 2% -15%;
starting gas phase supply of the gas distributor 2, introducing fluidizing gas and reaction raw material gas into the mixed reaction section 11, and adjusting the introducing amount of the fluidizing gas to enable the apparent gas velocity in the mixed reaction section 11 to be in a bubbling bed state or a turbulent bed state;
when the solid-phase product separated by the gas-solid separator 4 meets the preset requirement, the control valve 53 communicates the collecting pipeline 52 with the circulating pipeline 51, and the solid-phase product is led out from the collecting pipeline 52; when the solid-phase product separated by the gas-solid separator 4 does not meet the preset requirement, the control valve 53 communicates the circulation pipeline 51 with the mixing reaction section 11, and the solid-phase product is sent back to the mixing reaction section 11 for continuous reaction.
The method for improving the fluidization effect of the ultrafine powder particles realizes the improvement of the fluidization performance of the ultrafine powder particles by regulating and controlling the mixing proportion of the ultrafine powder particles and the fluidization assisting particles, and reduces the occurrence of abnormal fluidization phenomena such as slugging, channeling, agglomeration and the like.
Specifically, the method for improving the fluidization effect of ultrafine powder particles comprises the following steps:
step S1: and (3) opening the feeding supply of the feeding pipe 3, and introducing a mixture of ultrafine powder particles and fluidization assisting particles into the mixing reaction section 11, wherein the mass fraction of the fluidization assisting particles in the mixture is 2-15%. In this embodiment, the ultrafine powder particles are Geldart C-type particles, and the fluidization assisting particles are Geldart a-type or Geldart B-type particles having a large difference in size or density from the ultrafine powder particles, and the fluidization assisting particles do not participate in the reaction therein, and only play a role in fluidization assisting.
Step S2: the gas phase supply of the gas distributor 2 is started, the fluidization gas and the reaction raw material gas are introduced into the mixed reaction section 11, and the introduced amount of the fluidization gas is regulated, so that the apparent gas velocity in the mixed reaction section 11 is in a bubbling bed state or a turbulent bed state. After the reaction time is reached, the apparent gas velocity in the mixing reaction section 11 is properly increased by increasing the gas quantity of the gas distributor 2, and the reacted solid phase product is carried out and conveyed to the gas-solid separator 4 through the conveying reaction section 12, so that the rapid separation of the gas phase and the solid phase is realized, and the fluidization assisting particles remain in the mixing reaction section 11 to continue playing the fluidization assisting role.
Step S3: when the solid-phase product separated by the gas-solid separator 4 meets the preset requirement, the control valve 53 communicates the collecting pipeline 52 with the circulating pipeline 51, and the solid-phase product is led out from the collecting pipeline 52; when the solid-phase product separated by the gas-solid separator 4 does not meet the preset requirement, the control valve 53 communicates the circulation pipeline 51 with the mixing reaction section 11, and the solid-phase product is sent back to the mixing reaction section 11 for circulation reaction.
The foregoing is merely a few embodiments of the present invention and those skilled in the art may make various modifications or alterations to the embodiments of the present invention in light of the disclosure herein without departing from the spirit and scope of the invention.
Claims (11)
1. A dual particle reactor for improving fluidization of ultrafine particles, comprising:
the reactor comprises a reactor main body, a reaction mixing section and a reaction conveying section, wherein the reaction mixing section and the reaction conveying section are communicated, the diameter of the reaction mixing section is larger than that of the reaction conveying section, at least one gas distributor is arranged at the bottom of the reaction mixing section, a feed pipe is communicated with the reaction mixing section, and the feed pipe is arranged above the gas distributor;
the gas-solid separator is provided with a hollow body, a feed inlet, a first outlet for guiding out gas and a second outlet for guiding out solid are arranged on the body, and the feed inlet is communicated with the conveying reaction section;
the solid phase conveying pipeline is provided with a circulating pipeline, a collecting pipeline and a control valve, the circulating pipeline is used for communicating the second outlet of the gas-solid separator with the mixing reaction section through the control valve, and the collecting pipeline is communicated with the circulating pipeline through the control valve;
when the solid-phase product separated by the gas-solid separator meets the preset requirement, the control valve communicates the collecting pipeline with the circulating pipeline;
when the solid-phase product separated by the gas-solid separator does not meet the preset requirement, the control valve is used for communicating the circulating pipeline with the mixing reaction section.
2. The dual particle reactor for improving fluidization of ultrafine particles according to claim 1, wherein the ratio of the diameter of the mixing reaction section to the diameter of the conveying reaction section is 1.5 to 5.
3. The dual particle reactor for improving fluidization of ultrafine particles as set forth in claim 2, wherein the superficial gas velocity in the mixing reaction section is 0.02m/s to 2m/s, and the superficial gas velocity in the conveying reaction section is 1m/s to 10m/s.
4. The double particle reactor for improving fluidization of ultrafine particles according to claim 1, wherein the gas distributor is a gas distribution plate having an opening ratio of 0.25% to 2%, or the gas distributor is an annular gas distribution pipe having an opening ratio of 0.25% to 2%.
5. The double particle reactor for improving fluidization of ultrafine particles according to claim 1, wherein a central guide cylinder is provided in the mixing reaction section, and the ratio of the diameter of the mixing reaction section to the diameter of the central guide cylinder is 1.2 to 3.
6. The dual particle reactor for improving fluidization of ultrafine particles of claim 5, wherein the central guide cylinder divides the mixing reaction section into a central guide zone and an outer annular space zone along a radial direction of the mixing reaction section.
7. The dual particle reactor for improving fluidization of ultrafine particles of claim 6, wherein a plurality of gas distributors are disposed at the bottom of the mixing reaction section, wherein at least two gas distributors are disposed below the central flow guiding region and the outer annular space region.
8. The double particle reactor for improving fluidization of ultrafine particles according to claim 1, wherein a plurality of baffles are provided in the mixing reaction section, and a plurality of baffles are provided at intervals in a direction from the mixing reaction section to the conveying reaction section.
9. The double particle reactor for improving fluidization of ultrafine particles according to claim 1, wherein at least one venturi tube is provided in the mixing reaction section, and an axial direction of at least one venturi tube is parallel to an axial direction of the mixing reaction section.
10. The double particle reactor for improving fluidization of ultrafine particles according to claim 1, wherein the control valve is a three-way valve provided at a communication position between the collecting pipe and the circulating pipe, or the control valve is a first switch valve and a second switch valve provided on the circulating pipe and the collecting pipe, respectively.
11. A method for improving fluidization of ultrafine particles, characterized in that the method is carried out using a double particle reactor for improving fluidization of ultrafine particles as set forth in any one of claims 1 to 10, comprising the steps of:
opening a feed supply of a feed pipe, and introducing a mixture of ultrafine powder particles and fluidization assisting particles into the mixing reaction section, wherein the mass fraction of the fluidization assisting particles is 2% -15%;
starting gas phase supply of a gas distributor, introducing fluidizing gas and reaction raw material gas into the mixed reaction section, and adjusting the introducing amount of the fluidizing gas to enable the apparent gas velocity in the mixed reaction section to be in a bubbling bed state or a turbulent bed state;
when the solid-phase product separated by the gas-solid separator meets the preset requirement, the control valve communicates the collecting pipeline with the circulating pipeline, and the solid-phase product is led out from the collecting pipeline; when the solid-phase product separated by the gas-solid separator does not meet the preset requirement, the control valve is used for communicating the circulating pipeline with the mixing reaction section and sending the solid-phase product back to the mixing reaction section for continuous reaction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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