CN111715155A - Fluidized bed photocatalysis nitrogen fixation reactor - Google Patents
Fluidized bed photocatalysis nitrogen fixation reactor Download PDFInfo
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- CN111715155A CN111715155A CN202010697820.6A CN202010697820A CN111715155A CN 111715155 A CN111715155 A CN 111715155A CN 202010697820 A CN202010697820 A CN 202010697820A CN 111715155 A CN111715155 A CN 111715155A
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- B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
- B01J8/18—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles
- B01J8/24—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with fluidised particles according to "fluidised-bed" technique
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Abstract
The invention discloses a fluidized bed photocatalytic nitrogen fixation reactor, which comprises a cylinder body, wherein the upper end of the cylinder body is connected with a flat plate end socket through a flange, the lower end of the cylinder body is connected with an oval end socket, a liquid outlet is formed in the cylinder body, a gas outlet is formed in the flat plate end socket, and a liquid inlet and a gas inlet are formed in the oval end socket; a plurality of circular baffles are uniformly distributed in the cylinder body, LED lamp beads are mounted on the baffles, every two baffles are connected through a supporting tube, and a spherical microbead photocatalyst is placed between every two baffles. The fluidized bed photocatalysis nitrogen fixation reactor solves the problems of small contact area and insufficient contact between reactants and a catalyst and difficulty in catalyst recovery of the conventional equipment, and the LED lamp beads are used as light sources and arranged on the partition plate in a concentric circle mode, so that the fluidized bed photocatalysis nitrogen fixation reactor is uniform in illumination, high in light energy utilization rate, simple in structure, easy to disassemble, assemble and replace and convenient to maintain.
Description
Technical Field
The invention belongs to the technical field of catalytic reaction equipment, and particularly relates to a fluidized bed photocatalytic nitrogen fixation reactor.
Background
Ammonia is an important raw material which is indispensable to industrial and agricultural production in modern society. The current industrial synthesis of ammonia is carried out by a Haber process, requires high pressure (15-25 MPa) and high temperature (673-873K) conditions, and has complex process, and the raw material is pure N2And pure H2And the energy consumption is high, and a large amount of carbon dioxide is generated, so that the important significance of seeking a new environment-friendly and energy-saving synthetic ammonia technology is achieved.
Compared with the industrial ammonia synthesis technology, the photocatalysis nitrogen fixation (ammonia synthesis) technology has obvious advantages: (1) the method can be carried out at normal temperature and normal pressure, and the reaction condition is mild; (2) the process is simple; (3) the raw materials are air and water, so that the cost is low, the raw materials are easy to obtain, and the cost is low; (4) does not produce carbon dioxide and does not bring secondary pollution. Therefore, in recent years, many researchers have conducted extensive and intensive research on photocatalytic nitrogen fixation technology.
The photocatalytic nitrogen fixation reactor has made an important progress in recent years as one of the directions for the research of photocatalytic nitrogen fixation technology. At present, the photocatalytic nitrogen fixation (synthetic ammonia) reactor mainly comprises a mechanical stirring type reactor and a fixed bed reactor, but the two reactors have the defects. The catalyst in the mechanical stirring type reactor is in a suspension state, the contact between reactants and the catalyst is sufficient, but the catalyst is usually nanoparticles and is difficult to recover, while the fixed bed photocatalytic reactor does not have the problem of catalyst recovery, but the contact area between the reactants and the catalyst is small, the contact is insufficient, and then the efficiency of the photocatalytic reaction is influenced, and the practical application of the photocatalytic nitrogen fixation technology is seriously restricted by the defects.
Disclosure of Invention
The invention aims to provide a fluidized bed photocatalytic nitrogen fixation reactor, which solves the problems of catalyst recovery and small contact area and insufficient contact between a catalyst and a reactant in the conventional mechanical stirring type reactor.
The invention adopts the technical scheme that the fluidized bed photocatalytic nitrogen fixation reactor comprises a cylinder body, wherein the upper end of the cylinder body is connected with a flat plate end enclosure through a flange plate, the flat plate end enclosure is provided with a gas outlet, the lower end of the cylinder body is connected with an oval end enclosure, and the oval end enclosure is provided with a liquid inlet and a gas inlet; a plurality of circular partition plates are uniformly distributed in the cylinder body from top to bottom, every two partition plates are connected through a plurality of vertically arranged first support pipes, and the partition plate positioned at the uppermost layer is connected with the flat plate end enclosure through a vertically arranged second support pipe; a plurality of LED lamp beads are arranged on each partition plate, and spherical microbead photocatalysts are arranged between every two partition plates.
The present invention is also characterized in that,
a plurality of round holes are formed in each partition plate, and the diameter of each round hole is smaller than that of the spherical microbead photocatalyst.
Each partition board is provided with a plurality of LED mounting holes, the lower surface of the partition board positioned on the uppermost layer is provided with a plurality of LED lamp beads, the upper surface of the partition board positioned on the lowermost layer is provided with a plurality of LED lamp beads, and the upper and lower surfaces of the rest partition boards are provided with a plurality of LED lamp beads; the LED lamp beads are all installed in the LED installation holes.
The LED lamp beads are arranged in a concentric circle mode.
The upper part of the cylinder body is provided with a liquid outlet.
The invention has the beneficial effects that:
1) when the reactor is used, the contact area of reactants and the photocatalyst is large, the contact is sufficient, and the catalyst does not need to be recycled;
2) according to the reactor, LED lamp beads irradiated at an approximate 180-degree angle are used as light sources, the lamp beads are arranged on the upper portion and the lower portion of the partition plate in a concentric circle mode, the illumination in the reactor is uniform, and the light energy utilization rate is high;
3) the reactor obtained by the invention has compact structure, is easy to disassemble, assemble and replace the lamp beads and the photocatalyst, and is convenient to maintain.
Drawings
FIG. 1 is a sectional view of a fluidized bed photocatalytic nitrogen fixation reactor of the present invention;
FIG. 2 is a distribution diagram of the holes of the partition plate in the fluidized bed photocatalytic nitrogen fixation reactor of the present invention.
In the figure, 1 is a gas outlet, 2 is a spherical micro-pearl catalyst, 3 is a partition plate, 4 is an LED lamp bead, 5 is a liquid inlet, 6 is a gas inlet, 7 is an elliptical sealing head, 8 is a first supporting pipe, 9 is a circular hole, 10 is a cylinder body, 11 is a flat sealing head, 12 is an LED lamp bead mounting hole, 13 is a liquid outlet, 14 is a flange plate, 15 is a bolt, 16 is a nut, 17 is a second supporting pipe.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
The invention relates to a fluidized bed photocatalysis nitrogen fixation reactor, as shown in figure 1, which comprises a cylinder body 10, wherein the upper end of the cylinder body 10 is fixedly connected with a flange 14, the flange 14 is connected with a flat plate end enclosure 11 through a bolt 15 and a nut 16, and the lower end of the cylinder body 10 is connected with an oval end enclosure 7; the upper part of the cylinder 10 is provided with a liquid outlet 13, the flat plate end enclosure 11 is provided with a gas outlet 1, and the oval end enclosure 7 is provided with a liquid inlet 5 and a gas inlet 6; a plurality of circular partition plates 3 are uniformly distributed in the cylinder 10, every two partition plates 3 are connected through a plurality of vertically arranged first supporting tubes 8, and a spherical microbead photocatalyst 2 is placed between every two partition plates 3.
As shown in fig. 2, each partition plate 3 is provided with a plurality of circular holes 9 and a plurality of LED mounting holes 12, and air and water entering the fluidized bed photocatalytic nitrogen fixation reactor flow from bottom to top through the circular holes 9 on the partition plate 3; the diameter of the round hole 9 is smaller than that of the spherical microbead photocatalyst 2;
the lower surface of the partition plate 3 positioned on the uppermost layer is provided with a plurality of LED lamp beads 4, the upper surface of the partition plate 3 positioned on the lowermost layer is provided with a plurality of LED lamp beads 4, and the upper and lower surfaces of the rest of the partition plates 3 are provided with a plurality of LED lamp beads 4; the LED lamp beads 4 are arranged in the LED mounting holes 12; the LED lamp beads 4 are arranged in a concentric circle manner;
the partition plate 3 positioned at the uppermost layer is connected with the flat plate end enclosure 11 through a second support pipe 17 which is vertically arranged, and the partition plate 3 positioned at the lowermost layer is fixedly connected with the inner wall of the cylinder body 10;
the upper part of the cylinder 10 is provided with a liquid outlet 13, and the position of the second supporting pipe 17 corresponding to the liquid outlet 13 is provided with a hole, and the inner diameter of the hole is the same as that of the liquid outlet 13.
The invention relates to a fluidized bed photocatalysis nitrogen fixation reactor, which has the specific working principle that:
water and air respectively enter the cylinder 10 through the liquid inlet 5 and the gas inlet 6 and flow from bottom to top through the round hole 9 on the clapboard 3. Under the irradiation of the LED lamp beads 4 arranged on the partition boards 3, water and air are in contact with the surface of the spherical microbead photocatalyst 2 to react in a space formed by every two layers of partition boards 3, ammonia generated by the reaction is dissolved in the water to form ammonia water, the ammonia water is discharged from the liquid outlet 13 and then enters the reactor through the liquid inlet 5 for cyclic utilization, and residual air after the reaction is discharged through the gas outlet 1.
The invention relates to a fluidized bed photocatalysis nitrogen fixation reactor, which solves the problems of small contact area and insufficient contact between reactants and a catalyst and difficulty in catalyst recovery of the existing photocatalysis nitrogen fixation reaction equipment, and the LED lamp beads 4 are used as light sources, the LED lamp beads 4 are arranged on a partition plate 3 in a concentric circle mode, so that the illumination is uniform, the light energy utilization rate is high, in addition, the structure is simple, the LED lamp beads 4 and a spherical micro-pearl catalyst 2 are easy to disassemble, assemble and replace, and the maintenance is convenient.
Claims (6)
1. The fluidized bed photocatalytic nitrogen fixation reactor is characterized by comprising a cylinder (10), wherein the upper end of the cylinder (10) is connected with a flat plate end enclosure (11) through a flange plate (14), the flat plate end enclosure (11) is provided with a gas outlet (1), the lower end of the cylinder (10) is connected with an oval end enclosure (7), and the oval end enclosure (7) is provided with a liquid inlet (5) and a gas inlet (6); a plurality of circular partition plates (3) are uniformly distributed in the cylinder body (10) from top to bottom, every two partition plates (3) are connected through a plurality of vertically arranged first support pipes (8), the partition plate (3) positioned at the uppermost layer is connected with the flat plate end enclosure (11) through a vertically arranged second support pipe (17), and the partition plate (3) positioned at the lowermost layer is fixedly connected to the inner wall of the cylinder body (10); a plurality of LED lamp beads (4) are arranged on each partition plate (3), and a spherical micro-pearl catalyst (2) is arranged between every two partition plates (3).
2. The fluidized bed photocatalytic nitrogen fixation reactor as recited in claim 1, wherein each partition (3) is provided with a plurality of circular holes (9), and the diameter of each circular hole (9) is smaller than that of the spherical microbead photocatalyst (2).
3. The fluidized bed photocatalytic nitrogen fixation reactor as recited in claim 1, wherein each of the partition plates (3) is provided with a plurality of LED mounting holes (12), the lower surface of the partition plate (3) positioned at the uppermost layer is provided with a plurality of LED lamp beads (4), the upper surface of the partition plate (3) positioned at the lowermost layer is provided with a plurality of LED lamp beads (4), and the upper and lower surfaces of the rest of the partition plates (3) are provided with a plurality of LED lamp beads (4); the LED lamp beads (4) are all installed in the LED installation holes (12).
4. The fluidized bed photocatalytic nitrogen fixation reactor as claimed in claim 3, wherein the LED lamp beads (4) are arranged in concentric circles.
5. The fluidized bed photocatalytic nitrogen fixation reactor as recited in claim 1, wherein the upper part of the cylinder (10) is provided with a liquid outlet (13).
6. A fluidized bed photocatalytic nitrogen fixation reactor as recited in claim 5, wherein the second support tube (17) has a hole formed at a position corresponding to the liquid outlet (13), and the inner diameter of the hole is the same as the inner diameter of the liquid outlet (13).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010697820.6A CN111715155A (en) | 2020-07-20 | 2020-07-20 | Fluidized bed photocatalysis nitrogen fixation reactor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010697820.6A CN111715155A (en) | 2020-07-20 | 2020-07-20 | Fluidized bed photocatalysis nitrogen fixation reactor |
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| CN111715155A true CN111715155A (en) | 2020-09-29 |
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| CN202010697820.6A Pending CN111715155A (en) | 2020-07-20 | 2020-07-20 | Fluidized bed photocatalysis nitrogen fixation reactor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113134332A (en) * | 2021-05-17 | 2021-07-20 | 延安大学 | Catalyst automatic cycle type photocatalysis nitrogen fixation reactor |
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2020
- 2020-07-20 CN CN202010697820.6A patent/CN111715155A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113134332A (en) * | 2021-05-17 | 2021-07-20 | 延安大学 | Catalyst automatic cycle type photocatalysis nitrogen fixation reactor |
| CN113134332B (en) * | 2021-05-17 | 2022-05-20 | 延安大学 | Catalyst automatic cycle type photocatalysis nitrogen fixation reactor |
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