CN217796147U - Aeration type micro-bubble generator for high-pressure environment - Google Patents
Aeration type micro-bubble generator for high-pressure environment Download PDFInfo
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- CN217796147U CN217796147U CN202221799174.5U CN202221799174U CN217796147U CN 217796147 U CN217796147 U CN 217796147U CN 202221799174 U CN202221799174 U CN 202221799174U CN 217796147 U CN217796147 U CN 217796147U
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Abstract
The utility model discloses an aeration type microbubble generator used in high pressure environment, which comprises a shell, a sealing element, a gas inlet pipe, a bottom end cover, a supporting element, a flow guide element, an inner cavity and an aeration sheet; the upper end part of the shell is fixedly connected with the aeration sheet in a sealing way; the lower end part of the shell is fixedly connected with the outer edge of the bottom end cover in a sealing way; a gas inlet pipe is fixedly arranged in the middle of the bottom end cover, and a sealing element is arranged between the gas inlet pipe and the inner edge of the bottom end cover; and the gas inlet pipe is communicated with the inner cavity inside the shell; the support comprises a lower support and an upper support; the upper surface of the bottom end cover is vertically fixed with a lower support piece, and the top end of the lower support piece is fixed with a flow guide piece; an upper supporting piece is obliquely arranged between the flow guide piece and the aeration sheet. The aeration type micro-bubble generator can effectively adjust the size and frequency of locally generated bubbles and reduce the coalescence of the bubbles; the application scenes are diversified, and the method can be used for gas-liquid two-phase absorption and desorption.
Description
Technical Field
The utility model belongs to the technical field of the microbubble generator, especially, relate to an aeration type microbubble generator for high-pressure environment.
Background
The traditional chemical process is faced with three problems of high pollution, high material consumption and high energy consumption, and the process strengthening technology can promote the small, clean and efficient chemical production process. Microbubble generators are one representative of process intensification devices. Compared with the traditional large bubble, the micro bubble has better dispersion performance in a liquid phase and lower flow resistance, and can promote the mixing of gas and liquid. Compared with single large bubble, the micro bubble has the same gas volume, can obviously increase the area of a gas-liquid interface, realizes the crossing in order of magnitude and improves the gas-liquid mass transfer performance.
In the last 30 years, based on the advantages of microbubbles, the method attracts the attention of many researchers in the world, and the application scene of the method is very wide, and typical representatives of the method comprise polluted water treatment in the environmental protection industry, micro mineral flotation in the mining industry, gas-liquid two-phase absorption and desorption and gas-liquid-solid three-phase reaction in the chemical industry.
High pressure environments are ubiquitous in chemical industry. Aiming at gas-liquid two-phase absorption and desorption and gas-liquid-solid three-phase reaction in a high-pressure environment, the micro-bubble generator with good pressure resistance, simple structure, small size, low energy consumption and low cost is always a target sought by many enterprises and research and development personnel.
SUMMERY OF THE UTILITY MODEL
The first technical problem to be solved by the utility model is to provide an aeration type microbubble generator used in high pressure environment; the aeration type microbubble generator has the advantages of simple structure, easy processing, low energy consumption and low cost; the thickness can be correspondingly adjusted according to actual requirements, the pressure resistance is excellent, and the pressure-resistant cable has the advantages of safety and controllability and is suitable for being used in a high-pressure environment; the size and frequency of locally generated bubbles can be effectively adjusted, and the coalescence of the bubbles is reduced; the application scenes are diversified, and the method can be used for gas-liquid two-phase absorption and desorption.
In order to solve the technical problem, the utility model discloses a following technical scheme:
an aerated microbubble generator for use in a high pressure environment, comprising:
the device comprises a shell, a sealing element, a gas inlet pipe, a bottom end cover, a supporting element, a flow guide element, an inner cavity and an aeration sheet;
the upper end part of the shell is fixedly connected with the aeration sheet in a sealing way;
the lower end part of the shell is fixedly connected with the outer edge of the bottom end cover in a sealing way;
a gas inlet pipe is fixedly arranged in the middle of the bottom end cover, and a sealing element is arranged between the gas inlet pipe and the inner edge of the bottom end cover; and the gas inlet pipe is communicated with the inner cavity inside the shell;
the support comprises a lower support and an upper support; the upper surface of the bottom end cover is vertically fixed with a lower support piece, and the top end of the lower support piece is fixed with a flow guide piece;
an upper supporting piece is obliquely arranged between the flow guide piece and the aeration sheet.
In one embodiment, the aeration sheet is provided with a plurality of aeration holes, and the pore diameter of the aeration holes is 0.1-800 μm.
As an embodiment, the number of the aeration holes is 10-50000, the void ratio is 5% -80%, and all the aeration holes are uniformly distributed on the aeration sheet.
In one embodiment, the surface of the aeration sheet is covered with a porous sealing element, and the lower end part of the porous sealing element is provided with an internal thread; the bottom of aeration type microbubble generator is equipped with the external screw thread, and the internal thread of porous sealing member matches with aeration type microbubble generator's bottom external screw thread.
In one embodiment, the shape of the aeration sheet includes a plane, a bent surface, or an arc surface.
In one embodiment, the contact angle α of the surface of the aeration sheet is 30 ° to 160 °; preferably, the contact angle α of the surface of the aeration sheet is 155 °.
In one embodiment, the surface of the aeration sheet is a hydrophobic surface.
In one embodiment, the aeration sheet supports a catalyst on an outer surface thereof.
In one embodiment, the aerated micro-bubble generator is made of a corrosion-resistant and/or high-pressure-resistant material, and the corrosion-resistant and/or high-pressure-resistant material includes stainless steel, ceramics, hastelloy, nickel-based alloy, titanium alloy, and polytetrafluoroethylene.
In one embodiment, the thickness of the housing, the bottom end cap, the flow guide member and the aeration sheet is 5mm to 25mm.
In one embodiment, the flow guide member is provided with a through hole.
In a preferable embodiment, the flow guide member comprises 2-10 layers, a gap cavity is arranged between every two layers, and the through holes on the adjacent layers are staggered.
A method for carrying out gas-liquid absorption, desorption and gas-liquid-solid three-phase reaction by using the aeration type microbubble generator comprises the following steps:
s1, fixing an aeration type micro-bubble generator in a reaction kettle;
s2, firstly, feeding gas into the inner cavity through the gas inlet pipe, so that the gas is diffused to the surface of the aeration sheet from the inner cavity, and the interior of the reaction kettle reaches a specified pressure;
s3, adding the reaction liquid into the reaction kettle, so that the liquid coats the surface of the aeration sheet, and then forming micro bubbles on the surface of the aeration sheet by gas to enter a liquid phase main body, or carrying out gas-liquid-solid three-phase reaction on the surface of the aeration sheet;
and S4, after the reaction is finished, carrying out gas-liquid separation through a gas outlet and a liquid outlet of the reaction kettle, and respectively collecting gas and liquid products.
Preferably, in step S1, the surface of the aeration sheet of the aerated micro-bubble generator is hydrophobic, and the contact angle of the surface is 30 ° to 160 °.
Preferably, in step S1, the number of the aerated micro-bubble generators is 3 to 10; more preferably, the number is 2 to 5, and is fixed in the central region of the reaction vessel.
Preferably, in the step S2, the pressure of a control system in the reaction kettle is 1-10MPa, and the volume flow of gas is 10-10000L/h; more preferably, the volumetric flow rate of the gaseous reactants is between 200 and 4000L/h.
Preferably, in the step S3, the volume flow rate of the reaction liquid is 20-3000L/h; more preferably, the volume flow rate of the liquid reactant is 60 to 500L/h.
Any range recited in the present invention includes any numerical value between the endpoints and any sub-range comprised of any numerical value between the endpoints or any numerical value between the endpoints.
Unless otherwise specified, the raw materials of the present invention can be purchased commercially, and the equipment used in the present invention can be implemented by conventional equipment in the related art or by referring to the prior art in the related art.
Compared with the prior art, the utility model discloses following beneficial effect has:
1) The aeration type microbubble generator provided by the utility model has the advantages of simple structure, easy processing, low energy consumption and low cost;
2) The aeration type microbubble generator can adjust the thickness correspondingly according to the actual requirement, has excellent pressure resistance, has the advantages of safety and controllability, and is suitable for being used in a high-pressure environment;
3) The flow guide piece arranged in the aeration type microbubble generator can effectively adjust the size and the frequency of locally generated bubbles and reduce the coalescence of the bubbles;
4) The utility model discloses an aeration type microbubble generator uses the scene diversified, can be used to the double-phase absorption of gas-liquid and desorption. After the catalyst is loaded in the pore canal and on the surface of the aeration sheet, the catalyst can be used for gas-liquid-solid three-phase catalytic reaction.
Drawings
The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings
Fig. 1 is a schematic front view of an aerated microbubble generator according to the present invention;
FIG. 2 is a schematic view showing the structure of an aeration sheet having a circular plane according to the present invention;
FIG. 3 is a schematic view showing the structure of an aeration sheet having a circular bent surface according to the present invention;
FIG. 4 is a schematic view showing the structure of a catalyst-supporting aeration sheet having a circular arc-shaped surface according to the present invention;
FIG. 5 shows a schematic structural view of a middle layer porous flow guide member of the present invention;
fig. 6 is a schematic top view of the different-aperture aerated micro-bubble generator of the present invention applied in an array inside a tower;
fig. 7 shows a schematic structure diagram and a schematic diagram of an aeration type microbubble generator with a porous sealing element according to the present invention;
fig. 8 is a schematic structural view showing the structure of the through-hole of the perforated sealing member and the through-hole of the aeration sheet in the utility model at the same position;
fig. 9 is a schematic structural diagram of the multi-hole sealing element of the utility model when the through holes and the aeration sheets are staggered.
Detailed Description
In order to illustrate the invention more clearly, the invention is further described below with reference to preferred embodiments. It is to be understood by persons skilled in the art that the following detailed description is illustrative and not restrictive, and is not to be taken as limiting the scope of the invention.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
As an aspect of the present invention, referring to fig. 1, the present invention provides an aeration type microbubble generator for high pressure environment, comprising:
the shell 1 is used for forming an inner cavity for containing gas and is also used for internally arranging a flow guide element; can be round or polygonal, and the round shape is preferred in the embodiment of the invention;
a sealing member 2 for sealing between the gas inlet pipe and the bottom end cover;
a gas inlet pipe 3 for inputting gas;
a bottom end cap 4 for closing the lower end of the housing;
a support 5 for securing the baffle within the housing;
the flow-guiding member (6) is,
an inner chamber 7 as a gas accommodating chamber;
the aeration sheet 8 is used for aerating the gas into micro bubbles;
the upper end part of the shell 1 is fixedly connected with an aeration sheet 8 in a sealing way;
the lower end part of the shell 1 is fixedly connected with the outer edge of the bottom end cover 4 in a sealing way;
a gas inlet pipe 3 is fixedly arranged in the middle of the bottom end cover 4, and a sealing element 2 is arranged at the joint of the gas inlet pipe 3 and the bottom end cover 4; and the gas inlet pipe 3 is communicated with an inner cavity 7 inside the shell 1;
the support 5 comprises a lower support 51 and an upper support 52; a lower support piece 51 is vertically fixed on the upper surface of the bottom end cover 4, and a flow guide piece 6 is fixed at the top end of the lower support piece 51;
an upper supporting piece 52 which is obliquely arranged is arranged between the flow guide piece 6 and the aeration sheet 8.
As an example, referring to fig. 6, a plurality of aeration holes 81 are formed on the aeration sheet 8, and the pore size of the aeration holes 81 is 0.1 μm to 800 μm; so that the aeration holes can generate micro-bubbles of 30-1000 μm; the aeration holes 81 on the aeration sheet 8 are manufactured by machining, sintering or 3D printing technology.
It can be understood that the aeration holes 81 can be freely arranged, and the arrangement mode of the aeration holes 81 can be adjusted; the porosity of the open pores on the surface of the aeration sheet 8 can be adjusted according to actual use scenes; in the utility model, as a preferred embodiment, the number of the aeration holes 81 is 10-50000, the void ratio is 5% -80%, and all the aeration holes 81 are uniformly distributed on the aeration sheet.
As an example, referring to fig. 7, 8 and 9, the surface of the aeration sheet 8 is covered with a porous sealing member 9, and the lower end of the porous sealing member is provided with an internal thread; the bottom of the aeration type micro-bubble generator is provided with external threads, the internal threads of the porous sealing element are matched with the external threads at the bottom of the aeration type micro-bubble generator and used for fixing the porous sealing element 9 which is covered on the surface of the aeration sheet 8 and has the same shape, the porous sealing element 9 is selectively rotated, the size and the porosity of micropores of the aeration sheet 8 can be adjusted, and the generation frequency and the size of bubbles can be adjusted; namely, when the holes of the porous sealing element 9 and the holes on the surface 8 of the aeration sheet are positioned at the same positions, the original bubble generation frequency and size are not influenced; when the porous sealing element 9 rotates for a certain angle, partial micropores on the surface 8 of the aeration sheet can be selectively covered, the size and the porosity of the micropores are adjusted, and the size and the frequency of bubbles are further adjusted.
As an example, referring to fig. 2,3 and 4, the shape of the aeration sheet 8 includes a plane, a bent surface or a circular arc surface.
As an example, the contact angle α of the surface of the aeration sheet 8 is 30 ° to 160 °; preferably, the contact angle α of the surface of the aeration sheet is 155 °.
It is understood that the surface of the aeration sheet 8 may be a hydrophilic surface or a hydrophobic surface according to various needs. In the present invention, as a preferred embodiment, the surface of the aeration sheet is a hydrophobic surface; when the surface of the aeration sheet is a hydrophobic surface, the adhesion force of flowing liquid on the surface of the aeration sheet can be reduced, the flowing speed of the liquid on the surface is improved, micro-bubbles which are formed on the surface of the aeration sheet are quickly cut, the growth time of the micro-bubbles is shortened, and the size of the micro-bubbles is further reduced; in addition, after the surface of the aeration sheet is hydrophobic, the liquid containing micro-bubbles flows rapidly on the surface of the aeration sheet, so that the possibility of coalescence between the existing micro-bubbles and the micro-bubbles which are formed is reduced. As an embodiment, the outer surface of the aeration sheet is loaded with a catalyst for carrying out gas-liquid-solid three-phase reaction.
As an example, the aerated micro-bubble generator is made of corrosion-resistant or/and high-pressure-resistant materials, and the corrosion-resistant or/and high-pressure-resistant materials include stainless steel, ceramics, hastelloy, nickel-based alloy, titanium alloy and polytetrafluoroethylene.
As an embodiment, the thickness of the shell 1, the bottom end cover 4, the flow guide member 6 and the aeration sheet 8 is 5mm-25mm; so that the aerated micro-bubble generator can be used in a pressure environment of 0-25MPa and a temperature environment of 0-300 ℃ according to the change of the pressure environment.
As an example, referring to fig. 1 and 5, the flow guide member 6 is provided with a through hole 61; the flow guide piece and the through holes are used for adjusting the macroscopic distribution, the retention time and the flowing speed of the gas in the inner cavity area, so that the size and the frequency of bubbles formed on the surface of the aeration sheet are adjusted, the distribution of micro bubbles in the liquid phase main body is regulated, the coalescence of the bubbles is reduced, the uniformity of micro-scale bubbles is improved, and the gas content is changed.
As an example, referring to FIG. 5, the flow guide member 6 comprises 2-10 layers, a gap cavity 62 is arranged between each layer, and the through holes 61 on the adjacent layers are staggered.
The utility model relates to a method for utilize above-mentioned aeration type microbubble generator to carry out gas-liquid absorption, desorption and gas-liquid solid three-phase reaction, including following step:
s1, fixing an aeration type micro-bubble generator in a reaction kettle;
s2, firstly feeding gas into the inner cavity through the gas inlet pipe, so that the gas is diffused to the surface of the aeration sheet from the inner cavity, and the interior of the reaction kettle reaches a specified pressure;
s3, adding the reaction liquid into the reaction kettle, so that the liquid coats the surface of the aeration sheet, and then forming micro bubbles on the surface of the aeration sheet by gas to enter a liquid phase main body, or carrying out gas-liquid-solid three-phase reaction on the surface of the aeration sheet;
and S4, after the reaction is finished, carrying out gas-liquid separation through a gas outlet and a liquid outlet of the reaction kettle, and respectively collecting gas and liquid products.
As an example, in step S1, the surface of the aeration sheet of the aerated micro-bubble generator is hydrophobic, and the contact angle of the surface is 140 °,
as an example, in step S1, the number of the aerated micro-bubble generators is 3-10; more preferably, the number is 2 to 5, and is fixed in the central region of the reaction vessel.
As an example, in step S2, the pressure of the control system in the reaction kettle is 1 to 10MPa, and the volume flow rate of the gas is 10 to 10000L/h; more preferably, the volume flow rate of the gaseous reactants is from 200 to 4000L/h.
Example 1
Adopt the utility model discloses aeration type microbubble generator inside the bubbling tower carries out hydrogen sulfide's absorption under the high-pressure environment:
the experimental conditions were as follows: system pressure 3MPa, the stainless steel aeration sheet is circular, the diameter is 10cm, the porosity of the surface opening of the aeration sheet is 70%, and the size of the micropores is 600 microns; the liquid is sodium hydroxide solution, the temperature is 25 ℃, and the flow rate is 30L/h; the flow rate of hydrogen sulfide gas is 2m 3 H, concentration 1500ppm, temperature 25 ℃; conveying the liquid to a rotor flow meter through a pump, and conveying the liquid to a liquid inlet of a bubble column reactor; gas is conveyed to a gas inlet pipe of the micro-bubble generator through a flowmeter by a high-pressure pipeline, enters an inner cavity of the micro-bubble generator, enters liquid through the surface of the aeration sheet, and continuously forms micro-bubbles under the shearing action of the flowing liquid; separating gas from liquid at an outlet of the gas-liquid mixture, and detecting the concentration of hydrogen sulfide in the gas phase; under the current operating conditions, the concentration of hydrogen sulfide at the outlet was 150ppm and the absorption of hydrogen sulfide was 90%.
Example 2
The aeration type micro-bubble generator in the embodiment 1 is adjusted, and the size of the micro-pores on the surface of the aeration sheet is set to be 200 μm, so that the size of micro-bubbles in the device can be further reduced, the effective gas-liquid interface area is increased, and the gas-liquid absorption effect is improved; under the current operating conditions, the concentration of hydrogen sulfide at the outlet was 60ppm and the hydrogen sulfide absorption was 96%.
Example 3
On the basis of the embodiment 1, two layers of porous plate flow guiding parts are arranged inside the aerated micro-bubble generator, and the area of each layer of porous plate flow guiding part occupies half of the area of the aeration sheet and is positioned in the central area. The aperture ratio of each layer of porous plate is maintained at 20%, the holes are arranged in a staggered manner, and the size of the surface opening is set to be 200 mu m; compared with an aeration sheet without a flow guide piece, the aeration sheet reduces the flowing speed of gas in a central area, reduces the bubble generation frequency of the gas in the central area, and reduces the coalescence of micro bubbles; under the current operating conditions, the concentration of hydrogen sulfide at the outlet was 30ppm and the hydrogen sulfide absorption was 98%.
Example 4
The device is adopted to carry out desorption of oxygen in the bubble column under the high-pressure environment. Conditions of the experimentThe following were used: the system pressure is 4MPa, the stainless steel aeration sheet is circular, the diameter is 20cm, the porosity of the surface opening of the aeration sheet is 85 percent, and the micropore size is 300 mu m. The liquid is aqueous solution, the temperature is 10 ℃, and the flow rate is 60L/h. The gas flow rate of nitrogen gas is 3m 3 H, purity of 99%, temperature of 25 ℃; the liquid was pumped to a rotameter and fed to the liquid inlet of the bubble column reactor. The nitrogen gas is conveyed to a gas inlet of the micro-bubble generator through a high-pressure pipeline and a flowmeter, enters an inner cavity of the micro-bubble generator, enters liquid through the surface of the aeration sheet, and continuously forms micro-bubbles under the shearing action of the flowing liquid. And (4) separating gas from liquid at the outlet of the gas-liquid mixture, and detecting the concentration of oxygen in the liquid phase. Under the current operating conditions, the oxygen concentration at the outlet was 20ppm and the oxygen removal was 99%.
Example 5
In the desulfurization and purification working section of coke oven gas, the device is used for regenerating desulfurization liquid in a regeneration tower. The system pressure is 1MPa, the shape of the stainless steel aeration sheet is circular, the diameter is 40cm, the number is 4, the porosity of the surface opening of the aeration sheet is 70%, and the size of the micropore is 200 μm. The liquid is the amino desulfurization liquid in the desulfurizing tower in the previous section, the temperature is 40 ℃, and the flow is 500L/h. The oxygen gas flow rate is 8m 3 H, purity 99%, temperature 25 ℃. The liquid is conveyed to a flowmeter through a pump and is conveyed to a liquid inlet of the regeneration tower. Oxygen gas is conveyed to a gas inlet of the micro-bubble generator through a high-pressure pipeline and a flowmeter, enters an inner cavity of the micro-bubble generator, enters liquid through the surface of the aeration sheet, and continuously forms micro-bubbles under the shearing action of the flowing liquid. The amino desulfurization solution reacts with oxygen to generate solid precipitate of elemental sulfur. And (3) separating gas from liquid at an outlet of the gas-liquid mixture, filtering the fixed precipitate in the liquid, detecting the sulfur content in the liquid phase, and determining the regeneration effect. Under the current operating conditions, the regeneration effect of the solution was 97%.
Example 6
The device is used as a gas-liquid mixer and is combined with a traditional trickle bed reactor to carry out hydrogenation reaction on 5-nitroisoquinoline; the system pressure is 2MPa, the stainless steel aeration sheet is circular, the diameter is 5cm, the porosity of the surface opening of the aeration sheet is 60 percent, and the micropore size is 300 mu m. Tetrahydrofuran is a main body of liquid, wherein the tetrahydrofuran contains 10% of 5-nitroisoquinoline by mass, the temperature is 40 ℃, and the flow rate of the liquid is 40L/h; the gas is hydrogen, and the gas flow is 200L/h. The liquid phase contains a large amount of micro-bubbles and is sent to the inlet of the trickle bed reactor from the gas-liquid mixing outlet of the device; carrying out hydrogenation reaction with a porous catalyst in the reactor; the length of the trickle bed reactor is 100cm, the diameter is 10cm, the diameter of the internal platinum/carbon catalyst is 5mm, and the platinum content is 3 percent; collecting the hydrogenated liquid phase product at the outlet of the reactor, and analyzing by gas chromatography; the yields of the product 5-aminoisoquinoline and 5-amino-1, 2,3, 4-tetrahydroisoquinoline were 92% and 94%, respectively.
Example 7
On the basis of the embodiment 6, the size of the micropores on the surface of the aeration sheet is adjusted to 60 microns, so that more tiny bubbles are formed, liquid can conveniently carry micro bubbles into the interior of the porous catalyst in the trickle bed reactor, and more efficient gas-liquid-solid three-phase contact and reaction are realized. The yields of the product 5-aminoisoquinoline and 5-amino-1, 2,3, 4-tetrahydroisoquinoline were 97% and 99%, respectively.
Example 8
The hydrogenation of alpha-methyl styrene is directly carried out by adopting the device. And coating cerium dioxide on the surface of the stainless steel aeration sheet, and depositing active palladium on the surface of the cerium dioxide. The system pressure is 5MPa, the shape of the aeration sheet is circular, the diameter is 10cm, the porosity of the surface open pore is 80%, the micropore size is 300 mu m, and the active palladium content is 5%; the methanol solution contains 20 percent of alpha-methyl styrene by mass fraction as liquid, the flow rate is 30L/h, and the alpha-methyl styrene is conveyed to a liquid inlet of the device by a high-pressure pump; the hydrogen flow is 50L/h and is conveyed to a gas inlet by a gas pipeline; the gas forms micro bubbles on the surface of the aeration sheet, and simultaneously carries out catalytic reaction with the liquid on the surface of the aeration sheet under the action of active components; the generation amount of the product can be directly regulated and controlled by regulating and controlling the generation frequency of the bubbles; under the current conditions, the liquid phase product is detected by gas chromatography at the gas-liquid mixing outlet of the reactor, and the conversion rate of the alpha-methyl styrene is 99%.
Example 9
Aeration type microbubble generators with different apertures are applied to the bubble column in an array form to strengthen the absorption of hydrogen sulfide, and the arrangement mode is shown in figure 6. The system pressure is 4MPa, all the stainless steel aeration sheets are round in shape, the diameter is 10cm, and the porosity of the surface openings of the aeration sheets is 70%. Wherein the sizes of the surface micropores of the aeration sheets at the positions A, C, G and I are 100 mu m, the sizes of the surface micropores of the aeration sheets at the positions D and F are 200 mu m, and the sizes of the surface micropores of the aeration sheets at the positions B, E and H are 400 mu m; aeration sheets with different micropore sizes are arranged at different positions, the size of local micro bubbles in the whole bubble tower and the disturbance effect of gas and liquid are adjusted, and absorption is strengthened; the liquid is sodium hydroxide solution, the temperature is 25 ℃, and the flow rate is 300L/h; the flow of hydrogen sulfide gas is 8m 3 H, concentration 4000ppm, temperature 25 ℃. The liquid was pumped to a flow meter and to the liquid inlet of the bubble column reactor. The gas is respectively conveyed to the gas inlet of each micro-bubble generator by a high-pressure pipeline through a flowmeter, enters the inner cavity of each micro-bubble generator and enters the liquid through the surface of the aeration sheet. And (4) separating gas from liquid at the outlet of the gas-liquid mixture, and detecting the concentration of the hydrogen sulfide in the gas phase. Under the current operating conditions, the concentration of hydrogen sulfide at the outlet was 20ppm and the hydrogen sulfide absorption was 99.5%.
Example 10
The absorption of hydrogen sulfide in the bubble column was performed using an aerated micro-bubble generator containing a porous seal, as shown in fig. 7. The experimental conditions were as follows: the system pressure is 4MPa, the stainless steel aeration sheet is arc-shaped, the diameter is 15cm, the porosity of the surface opening of the aeration sheet is 70%, and the size of the micropores is 300 mu m; the liquid is sodium hydroxide solution, the temperature is 25 ℃, and the flow rate is 30L/h; hydrogen sulfide gas flow of 1m 3 H, concentration 2000ppm, temperature 25 ℃; conveying the liquid to a rotor flow meter through a pump, and conveying the liquid to a liquid inlet of a bubble column reactor; the gas passes through a high-pressure pipelineThe flow meter is conveyed to a gas inlet pipe of the micro-bubble generator, enters an inner cavity of the micro-bubble generator, enters liquid through the surface of the aeration sheet, and continuously forms micro-bubbles under the shearing action of the flowing liquid. When the pore positions of the porous sealing element coincide with those of the surface of the aeration sheet, the concentration of hydrogen sulfide at the detection outlet is 200ppm, and the absorption rate of hydrogen sulfide is 90%. When the porous sealing element is rotated by a certain angle, the size of the hole is kept unchanged, and 50% of holes on the surface of the aeration sheet are covered, the generation frequency of micro bubbles is obviously increased under the original gas flow, the local coalescence of the micro bubbles is reduced, the concentration of hydrogen sulfide at an outlet is detected to be 100ppm, and the absorption rate of the hydrogen sulfide is 95%. When the porous sealing element is rotated to another angle, the number of the pores is kept unchanged, 50% of the area of all the micropores is sealed, the size of the micropores generated by all the bubbles is reduced to 150 microns, the concentration of hydrogen sulfide at a detection outlet is 20ppm, and the absorption rate of the hydrogen sulfide is 99%.
It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not limitations to the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. Not all embodiments are exhaustive. All obvious changes or variations led out by the technical scheme of the utility model are still in the protection scope of the utility model.
Claims (10)
1. An aeration type microbubble generator for high-pressure environment is characterized in that: comprises a shell, a sealing element, a gas inlet pipe, a bottom end cover, a supporting element, a flow guide element, an inner cavity and an aeration sheet;
the upper end part of the shell is fixedly connected with the aeration sheet in a sealing way;
the lower end part of the shell is fixedly connected with the outer edge of the bottom end cover in a sealing way;
a gas inlet pipe is fixedly arranged in the middle of the bottom end cover, and a sealing element is arranged between the gas inlet pipe and the inner edge of the bottom end cover; and the gas inlet pipe is communicated with the inner cavity inside the shell;
the support comprises a lower support and an upper support; the upper surface of the bottom end cover is vertically fixed with a lower support piece, and the top end of the lower support piece is fixed with a flow guide piece;
an upper supporting piece is obliquely arranged between the flow guide piece and the aeration sheet.
2. The aerated microbubble generator for high pressure environments of claim 1, wherein: the aeration sheet is provided with a plurality of aeration holes, and the aperture of each aeration hole is 0.1-800 μm.
3. The aerated microbubble generator for high pressure environments of claim 2, wherein: the number of the aeration holes is 10-50000, the void ratio is 5% -80%, and all the aeration holes are uniformly distributed on the aeration sheet.
4. The aerated microbubble generator for high pressure environments of claim 1, wherein: the surface of the aeration sheet is covered with a porous sealing element, and the lower end part of the porous sealing element is provided with internal threads; the bottom of aeration type microbubble generator is equipped with the external screw thread, and the internal thread of porous sealing member matches with aeration type microbubble generator's bottom external screw thread.
5. The aerated microbubble generator for high pressure environments of claim 1, wherein: the shape of the aeration sheet comprises a plane, a bent surface or an arc surface.
6. The aerated microbubble generator for high pressure environments of claim 1, wherein: the contact angle alpha of the surface of the aeration sheet is 30-160 degrees.
7. The aerated microbubble generator for high pressure environments of claim 1, wherein: the surface of the aeration sheet is a hydrophobic surface.
8. The aerated microbubble generator for high pressure environments of claim 1, wherein: the outer surface of the aeration sheet is loaded with a catalyst.
9. The aerated microbubble generator for high pressure environments of claim 1, wherein: the thickness of the shell, the bottom end cover, the flow guide piece and the aeration sheet is 5mm-25mm.
10. The aerated microbubble generator for high pressure environments of claim 1, wherein: the flow guide piece is provided with a through hole; the flow guide piece comprises 2-10 layers, a gap cavity is arranged between every two layers, and through holes on adjacent layers are staggered.
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| CN202221799174.5U CN217796147U (en) | 2022-07-13 | 2022-07-13 | Aeration type micro-bubble generator for high-pressure environment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221799174.5U CN217796147U (en) | 2022-07-13 | 2022-07-13 | Aeration type micro-bubble generator for high-pressure environment |
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