CN213644075U - Microbubble generator and hydrocarbon oil hydrogenation reactor - Google Patents
Microbubble generator and hydrocarbon oil hydrogenation reactor Download PDFInfo
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- CN213644075U CN213644075U CN202022168484.4U CN202022168484U CN213644075U CN 213644075 U CN213644075 U CN 213644075U CN 202022168484 U CN202022168484 U CN 202022168484U CN 213644075 U CN213644075 U CN 213644075U
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Abstract
The utility model provides a microbubble generator and hydrocarbon oil hydrogenation ware, microbubble generator is from supreme gas-liquid inlet section (3), choke (4), gradual expansion section (5) and gas-liquid outlet section (6) connection component down, gas-liquid inlet section comprises lower part straight tube section and upper portion's undergauge section, gas-liquid inlet section bottom opening, gas-liquid outlet section top is equipped with the perforated plate, the lateral wall of choke is equipped with the gas pocket, the choke with the internal diameter ratio of gas-liquid inlet section straight tube section is 0.1 ~ 0.9: 1. the utility model provides a microbubble generator simple structure does not move equipment, so the processing degree of difficulty is little, and the debugging is simple. The size and distribution of the generated bubbles are uniform. The utility model provides a hydrocarbon oil hydrogenation ware is showing and has improved gas-liquid mass transfer effect, and reaction efficiency is high.
Description
Technical Field
The utility model relates to a chemical industry equipment internals and chemical industry equipment, more specifically relates to a microbubble generator and a hydrocarbon oil hydrogenation ware.
Background
The upflow reactor is widely applied in the field of petrochemical industry, such as upflow fixed bed residual oil hydrogenation reactor, ebullated bed hydrogenation reactor, suspended bed hydrogenation reactor and the like. Because the reactant flows from bottom to top in the upflow reactor, compared with the traditional downflow fixed bed reactor, the upflow reactor has the advantages of good adaptability to poor raw materials, high space utilization rate of the reactor, lower pressure drop and the like, but also has some problems, such as uneven distribution of the reactant, and easy occurrence of hot spots.
In the upflow reactor, both the gas phase and the liquid phase of the reactant flow in the reactor from bottom to top, the liquid phase at the outlet section of the reactor is the continuous phase, and the hydrogen is the dispersed phase. Because the hydrogen is provided in a dissolved hydrogen manner, in order to ensure stable hydrogen partial pressure and hydrogen dissolution rate, the dissolved hydrogen in the liquid phase is always in a saturated state and a small amount of hydrogen exists in a gas form, and finally, the generated bubbles have smaller diameters and are more uniformly distributed.
The microbubble generator with good bubble distribution is one of the most important parts in the upflow reactor, and is directly related to the uniformity of the initial distribution of gas phase and liquid phase, and unreasonable microbubble generators can cause the initial material entering the reactor to be unevenly distributed.
The micro bubbles have the advantages of large specific surface area, high gas content, slow bubble rising speed, fast dissolution and the like, and are widely applied to the industries of wastewater treatment, wine brewing, ore flotation, oil exploitation, biological culture and the like.
The formation of the microbubbles is a physical phenomenon of gas-liquid two-phase flow, and the formation of the microbubbles and the physicochemical properties of the microbubbles are utilized. It is generally believed that bubble breakup in turbulent flow fields is primarily a result of the interaction of external factors, including flow field characteristics, liquid phase properties, and other external conditions, and internal factors, including gas phase properties, internal forces of the bubbles, and the like.
The micro-bubble generator is classified into a spiral liquid type, a spray type, a pressure dissolution type, and a mechanical dispersion type according to a bubble generation manner.
The spiral liquid type microbubble generator generates microbubbles by using the centrifugal action of high-speed rotating liquid, water enters the bottom of the device at a tangential speed through the centrifugal pump, so that the water forms a rotary flow track, vacuum is formed in the center, and gas is sucked to form the microbubbles.
The injection type microbubble generator uses a design similar to an orifice plate flowmeter or a venturi tube to lead the flow to increase the flow speed and reduce the pressure due to the local change of a pipeline, thereby leading the gas phase, or leading the gas phase in a mode of generating a negative pressure area at the center by using the liquid phase rotational flow, and then cutting the gas into microbubbles by using the high turbulence and the shearing generated by the high-speed fluid.
Pressure dissolves type microbubble generator and gets into the pressurization jar through pressurizeing gas-liquid mixture to certain pressure after, gas saturation dissolves in liquid, through relief pressure valve decompression, pressure reduces suddenly, and the gas of saturation dissolving in liquid is appeared for gas generation microbubble, the size and the distribution of microbubble depend on the pressure of pressurization jar.
The mechanical dispersion method micro bubble generator cuts gas into micro bubbles in the high-speed shearing and stirring process by introducing water and air into a container simultaneously for stirring.
Although the microbubble technology has many advantages, the traditional microbubble generator has the defects of complex structure, difficult processing and installation, high later maintenance cost, low uniformity of bubble diameter and the like, and the application efficiency and the effect of the microbubble technology are required to be further improved.
CN109200839A discloses a venturi-type microbubble generator, bubble generating device include that preceding diffuser section, rectification section, venturi, changeover portion and back contraction section connect gradually, and the ventilation system is connected through the breather pipe in venturi's throat, and ventilation system lets in the gas-liquid mixture in to venturi. The device only accelerates the liquid phase through necking down and then cuts apart the gaseous phase, so the gas-liquid two-phase can not be fine mixes, and technical parameters such as bubble size and distribution uniformity and corresponding technical effect have not been described simultaneously.
CN109966939A discloses a venturi microbubble generating device, including venturi and whirl device, the section of gradually opening or convergent section have at least one whirl device, utilize the high-speed turbulence that whirl device produced to make the bubble take place the secondary breakage, but have the manufacturing degree of difficulty big, install inconvenient scheduling problem.
SUMMERY OF THE UTILITY MODEL
The utility model provides a technical problem be on prior art's basis, to the problem that among the prior art microbubble generator has that the structure is complicated, processing and installation difficulty, later stage cost of maintenance are high, the bubble diameter degree of consistency is not high, provide a simple structure's microbubble generator. The utility model also provides a hydrocarbon oil hydrogenation reactor who has set up this microbubble generator.
The utility model provides a pair of microbubble generator, follow supreme 3, the choke 4 of gas-liquid inlet section, the section of gradually expanding 5 and the gas-liquid outlet section 6 of connecting to form down, wherein, the gas-liquid inlet section comprises lower part's straight tube section and the undergauge section on upper portion, gas-liquid inlet section bottom opening, gas-liquid outlet section top is equipped with the perforated plate, the lateral wall of choke is equipped with the gas pocket, the choke with the internal diameter ratio of gas-liquid inlet section straight tube section is 0.1 ~ 0.9: 1.
the utility model provides a hydrocarbon oil hydrogenation ware, including the product export of the material import of reactor casing, casing bottom, casing top, set up in the fender of the inside catalyst bed of reactor and catalyst bed lower part and flow the board, keep off and flow board and go up the trompil, foretell microbubble generator is located keep off and flow board below, make microbubble generator top with keep off and flow board and go up the trompil and correspond the setting.
The utility model provides a microbubble generator and hydrocarbon oil hydrogenation ware's beneficial effect does:
the utility model provides a microbubble generator's simple structure does not have the mobile device, so the processing degree of difficulty is little, and the debugging is simple. The size and distribution uniformity of the generated bubbles are uniform. The utility model provides a microbubble generator can be arranged in the upflow reactor, is applicable to hydrocarbon oil hydrogenation ware, including diesel oil or heavy oil hydrogenation ware. The utility model provides a hydrocarbon oil hydrogenation ware is showing and has improved gas-liquid mass transfer effect, has improved the mass transfer rate that the gaseous phase dissolved in liquid phase oil, and the dissolving effect of hydrogen in hydrocarbon oil has obtained obvious improvement. The reaction efficiency is improved, and the conversion rate of hydrocarbon oil hydrogenation is improved.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the microbubble generator.
Fig. 2 is a perspective sectional view of the microbubble generator.
Fig. 3 is a schematic view of the construction of the bubble cap top plate.
FIG. 4 is a schematic structural view of a perforated plate at the top of the gas-liquid outlet section.
Fig. 5 is a schematic diagram of a structure in which a microbubble generator is installed in an upflow reactor.
Fig. 6 is a schematic structural view of the microbubble generator of comparative example 1.
Description of reference numerals:
1-soaking the cap; 2-bottom perforated plate; 3-gas-liquid inlet section; 4-a throat; 5-a divergent section; 6-gas-liquid outlet section; 7-top perforated plate; 8-material inlet; 9-a flow baffle; 10-a reactor shell; 11-catalyst bed layer; 12-a product outlet; 13-bottom inlet; 14-a middle riser; 15-a vent hole; 16-top outlet.
Detailed Description
The following describes the embodiments of the present invention in detail. It is to be understood that the description of the embodiments herein is for purposes of illustration and explanation only and is not intended to limit the invention.
In the present invention, unless otherwise specified, the directional terms used should be interpreted appropriately in conjunction with the context and the direction in actual use.
In a first aspect, the utility model provides a microbubble generator, follow supreme gas-liquid inlet section 3, choke 4, the section of gradually expanding 5 and the gas-liquid export section 6 of following and connect and constitute, wherein, the gas-liquid inlet section comprises lower part's straight tube section and the undergauge section on upper portion, gas-liquid inlet section bottom opening, gas-liquid export section top is equipped with the perforated plate, the lateral wall of choke is equipped with the gas pocket, the choke with the internal diameter ratio of gas-liquid inlet section straight tube section is 0.1 ~ 0.9: 1. preferably 0.3 to 0.6: 1.
optionally, a bubble cap is arranged at the bottom of the gas-liquid inlet section, the bubble cap is composed of a cylindrical bubble cap side wall, a bubble cap bottom and a circular bubble cap top plate, the bottom of the gas-liquid inlet section is connected with the bubble cap top plate, the bubble cap top plate is a porous plate, and the inner diameter ratio of the gas-liquid inlet section straight pipe section to the bubble cap is 0.1-0.9: 1. preferably 0.5 to 0.7: 1.
optionally, the gas-liquid inlet section, the throat, the divergent section, and the gas-liquid outlet section have a height ratio of: 2-10: 1:1: 2-10.
The gas-liquid inlet section is a combined structure of a lower straight pipe section and an upper reducing section, and preferably, the gas-liquid inlet lower straight pipe section is 0.1-0.5 of the height of the gas-liquid inlet section.
Optionally, the height of the gas-liquid inlet section is 1-10mm, the height of the throat is 5-20 mm, the height of the divergent section is 3-15 mm, and the height of the gas-liquid outlet section is 10-40 mm.
Optionally, the height of the side wall of the bubble cap is 1-50 mm, the height from the top plate of the bubble cap to the bottom of the bubble cap is 1-30 mm, the inner diameter of the bubble cap is 1-50 mm, and the side wall of the bubble cap is 1-10mm higher than the top plate of the bubble cap.
Optionally, 2-20 symmetrically distributed air holes are formed in the side wall of the throat pipe, and the diameter of each air hole is 1-5 mm. The air holes on the side wall of the throat pipe are uniformly distributed in the circumferential direction, so that the air can conveniently enter the riser pipe at a high air speed, and the air distribution is more uniform.
Optionally, the aperture ratio of the porous plate of the gas-liquid outlet section is 1% -10%, and the equivalent diameter of the aperture is 0.1-10 mm.
Optionally, the aperture ratio of the top plate of the bubble cap is 1% -10%, and the equivalent diameter of the aperture is 0.1-10 mm.
Optionally, the reducing section of the gas-liquid inlet section is a conical tube, the included angle between the generatrix of the conical tube and the axis is 15-25 degrees, and the gradually expanding section is a conical tube, and the included angle between the generatrix of the conical tube and the axis is 5-20 degrees.
Preferably, the gas-liquid inlet section, the throat and the divergent section are respectively and movably connected. More preferably, the gas-liquid inlet section, the throat and the diverging section are connected by a screw thread.
The utility model provides an application method of microbubble generator. The micro bubble generator has one embodiment with directly opened hole without bubble cap in the lower end and opened hole in the middle part of the micro bubble generator. The microbubble generator is arranged in the upflow reactor, and the top of the microbubble generator is connected with the tower tray and is provided with a hole. The liquid phase directly enters the micro-bubble generator from an opening at the lower part of the gas-liquid inlet section, the gas phase enters from the side wall of the throat pipe, the gas phase and the gas phase move upwards after being mixed, and bubbles formed at the opening of the throat pipe overflow from a porous plate at the top of the gas-liquid outlet section and enter the upflow reactor.
The utility model provides another preferred embodiment of the microbubble generator, which comprises a gas-liquid inlet section, a choke, a gradual expansion section and a gas-liquid outlet section which are connected in sequence, wherein the bottom of the gas-liquid inlet section is connected with a bubble cap, and a gas-liquid outlet at the top is of a porous plate structure; the bubble cap is composed of a cylindrical bubble cap side wall, a bubble cap bottom and a circular bubble cap top plate, the bottom of the gas-liquid inlet section is connected with the bubble cap top plate, the bubble cap top plate is a porous plate, and the inner diameter of the gas-liquid inlet section straight pipe section is smaller than that of the bubble cap. The microbubble generator is arranged in the upflow reactor, and the top of the microbubble generator is connected with the tower tray. In the working process, liquid and gas enter the micro-bubble generator from the opening of the top plate of the bubble cap, the gas phase and the liquid phase enter the bubble cap after passing through the porous plate at the top of the bubble cap, the gas phase and the liquid phase are fully mixed to form uniformly mixed gas-liquid two-phase flow, and the gas-liquid two-phase flow flows upwards by 180 degrees in a streaming manner and enters the liquid rising pipe. The gas-liquid inlet section, the throat pipe, the divergent section and the gas-liquid outlet section form a liquid ascending pipe of the micro-bubble generator.
When gas-liquid two-phase flow enters the bubble cap from the reactor through the bubble ceiling plate, the gas-liquid two-phase flow enters the hole with the reduced diameter when passing through the porous plate, the flow rate of the two phases is accelerated, the turbulence degree of the gas-liquid is enhanced, and part of gas is generated from the porous plate in a bubble form and enters the lift tube.
The flow velocity of the gas-liquid two-phase flow is increased after passing through the throat, and the gas entering from the air hole is cut into a plurality of small bubbles with different sizes under the action of high-speed liquid flow; and then, when the bubbles rise to reach the top outlet of the micro-bubble generator, the top porous plate continues to shear the bubbles, the bubbles are secondarily crushed, and the size distribution uniformity of the bubbles is enhanced.
In the process that gas-liquid two-phase flow rises to the top from the liquid lifting pipe, gas-liquid two phases enter the reduced flow channel, the flow velocity of the two phases is accelerated, the gas-liquid turbulence degree is enhanced, the liquid phase flow channel is designed into a structure which is firstly contracted and then enlarged, the structure causes that a complex pressure profile is formed along liquid flow, the pressure of part of the position is reduced, and bubbles with smaller diameter are generated in the position where the bubbles pass through the top porous plate.
The utility model provides an among the microbubble generator, gas-liquid inlet section, choke, divergent section and gas-liquid outlet section constitute the stalk, and the stalk not only is used for transmitting gas, also is used for transmitting liquid, and liquid and partial gas get into the stalk after the bottom bubble cap flows around through the perforated plate, are favorable to controlling the liquid phase velocity of flow and promote the mixing between the gas-liquid is double-phase. Then the liquid is mixed with the gas when rising to the throat, the gas is cut into a plurality of bubble columns with different sizes by the continuous liquid phase, and the rear bubbles are divided into a plurality of small bubbles with uniform sizes and smaller diameters in a porous plate structure at the top and then enter the upflow reactor.
Generally, the fluid flowing into the microbubble generator is generally a mixed fluid of gas and liquid. Preferably, the mixed fluid is first passed through a fluid separation device to separate the gas in the mixed fluid from the liquid before entering the microbubble generator. Subsequently, the separated gas is introduced from the side of the upflow reactor, and the liquid is introduced from the bottom of the upflow reactor, and the two are re-mixed in the microbubble generator. Through above-mentioned technical scheme, the liquid and the gas that flow through the stalk can better mix.
The second aspect, the utility model provides a hydrocarbon oil hydrogenation ware, including the product export of the material import of reactor casing, casing bottom, casing top, set up in the fender of the inside catalyst bed of reactor and catalyst bed lower part and flow the board, keep off and flow board trompil on the board, above-mentioned any kind of microbubble generator is located keep off and flow board below, make microbubble generator top with keep off and flow board and go up the trompil and correspond the setting.
The utility model provides an application method of hydrocarbon oil hydrogenation ware, hydrocarbon oil raw materials import from the bottom and introduce the reactor to the cocurrent flows upwards, and the trompil on bubble cap roof is followed to liquid phase reactant stream and is got into the bubble cap, from the gas-liquid inlet pipe upflow, hydrogen gets into in the microbubble generator from the trompil on the choke, further mixes with liquid phase reactant stream, gets into the space above the baffling board from the roof of microbubble generator, and reaction stream and hydrogen obtain better mixture, react at the catalyst bed; the reacted stream exits the reactor through the top product outlet.
The structure of the microbubble generator and the hydrocarbon oil hydrogenation reactor provided by the present invention is specifically described below with reference to the accompanying drawings.
Fig. 1 and 2 are a schematic structural view and a perspective sectional view of a preferred embodiment of the microbubble generator. As shown in fig. 1, the microbubble generator is formed by connecting a bubble cap 1, a gas-liquid inlet section 3, a throat pipe 4, a gradually expanding section 5 and a gas-liquid outlet section 6 from bottom to top, wherein the bubble cap 1 is formed by a cylindrical bubble cap side wall 2, a bubble cap bottom and a circular bubble cap top plate, the gas-liquid inlet section 3 is formed by a lower straight pipe section and an upper reducing section, the side wall of the throat pipe 4 is provided with an air hole, and the top of the gas-liquid outlet section 6 is provided with a porous plate 7. The structure of the porous plate at the top of the gas-liquid outlet section is shown in figure 4, and the aperture ratio is 10-90%. The bottom of the gas-liquid inlet section 3 is connected with a top plate of the bubble cap, the top plate of the bubble cap is a porous plate, the structure is shown in figure 3, and the aperture ratio is 10% -90%.
The utility model provides a microbubble generator is applicable to among the upflow reactor, is applicable to hydrocarbon oil hydrogenation upflow reactor. The hydrocarbon oil hydrogenation reactor provided by the utility model is shown as the attached figure 5. Including reactor shell 10, bottom material import 8, upper portion result export 12, set up in the inside catalyst bed 11 of reactor and the fender of catalyst bed lower part and flow board 9, keep off and flow the board trompil of going up, microbubble generator is located keep off and flow board below, make microbubble generator top with keep off and flow the board and go up the trompil and correspond the setting.
Fluid flows through the microbubble generator from bottom to top in the reactor, so that gas and liquid phases are mixed more sufficiently, and mixed fluid can uniformly flow around after flowing through the microbubble generator.
The utility model provides a hydrocarbon oil hydrogenation ware is the upflow reactor, is applicable to heavy hydrocarbon oil hydrogenation, is particularly useful for the hydrogenation of heavy hydrocarbon oil raw materials.
The above is sufficient to explain the utility model discloses a microbubble generator can make fluid evenly distributed's function, explains the gas-liquid mixture performance in this microbubble generator makes the mixed fluid through the embodiment below.
In the examples and comparative examples:
in order to represent the distribution effect of the material flow diffusion device on gas and liquid, a gas-liquid two-phase flow online measuring instrument is adopted to measure the bubble diameter of the liquid on the cross section, and a distribution non-uniform factor M is adoptedfIndicating the difference in the distribution of bubble diameters across the cross-section. Distribution of non-uniformity factor MfThe calculation formula is as follows:
wherein n is the number of the measuring points of the conductance probe; a isiIs the bubble diameter at the ith probe station, and a is the average bubble diameter at the n probe stations.
In order to characterize the distribution effect of the material flow diffusion device on gas and liquid, the gas content is adopted
The dispensing performance of the novel gas-liquid dispenser was evaluated. The gas content in the reactor is directly related to the operation efficiency of the whole reactor, and simultaneously the working performance of the gas-liquid distributor is also reflected, and the gas content calculation formula is as follows:
wherein HiThe initial liquid level height; hnThe height of the liquid level after bubbling.
In order to represent the mixing effect of the material flow diffusion device on gas and liquid, the gas-liquid two-phase flow online measuring instrument is used for measuring the bubble diameter of the liquid on the cross section, and the average bubble diameter is used for representing the mixing effect between the gas phase and the liquid phase.
Example 1
Carrying out cold die test by using the micro-bubble generator shown in the attached figures 1 and 2, wherein the micro-bubble generator is formed by connecting a gas-liquid inlet section, a throat pipe, a gradually expanding section and a gas-liquid outlet section from bottom to top, and the bottom of the gas-liquid inlet section is provided with a bubble cap; wherein, the inner diameter of the throat is 15mm, the inner diameter of the lower straight pipe section of the gas-liquid inlet section is 30mm, the inner diameter of the bubble cap is 25mm, and the heights of the gas-liquid inlet section, the throat, the gradual expansion section and the gas-liquid outlet section are respectively 70mm, 20mm, 10mm and 50 mm. The height of the side wall of the bubble cap is 10mm, and the height of the top plate of the bubble cap is 20 mm. The lateral wall of the throat pipe is provided with 4 air holes, and the diameter of each air hole is 5 mm. The opening rate of the porous plate at the top of the gas-liquid outlet section is 10%, and the equivalent diameter of the opening is 5 mm. The aperture ratio of the foam cap top plate porous plate is 10%, and the equivalent diameter of the aperture is 5 mm. The included angle between the generatrix of the reducing section of the gas-liquid inlet section and the axis is 25 degrees, and the included angle between the generatrix of the gradually expanding section and the axis is 15 degrees.
The microbubble generator is arranged in an upflow reactor with the diameter of 300mm, the microbubble generator is arranged at the bottom of the tray, and the top outlet of the microbubble generator is matched with the opening on the tray. Measuring the bubble diameter of the liquid on the cross section by adopting a gas-liquid two-phase flow online measuring instrument, and calculating a distribution non-uniformity factor MfThe gas content, the average diameter of the bubbles and the average velocity of the bubbles, and the results of the measurement and calculation are shown in tables 1 to 4, respectively.
Comparative example 1
The microbubble generator used in comparative example 1 is a circular tube with open bottom and top as shown in fig. 6, and the middle upper part of the circular tube is provided with air holes, and the specific structure is a bottom inlet 13, a middle riser 14, an air vent 15 and a top outlet 16. Wherein the bottom inlet angle is 45 degrees, the diameter of the ascending pipe is 30mm, and the length is 150 mm; the number of the vent holes is 2, and the diameters of the vent holes are 5 mm; the diameter of the top outlet was 30 mm. The microbubble generator was mounted on the tray of an upflow reactor with a diameter of 300mm, with the top outlet of the microbubble generator mating with an opening in the tray.
The test method was the same as in example 1, and the distribution unevenness factor M was calculatedfThe gas content, the average diameter of the bubbles and the average velocity of the bubbles, and the results of the measurement and calculation are shown in tables 1 to 4, respectively.
TABLE 1
| Detailed description of the preferred embodiments | Distribution of non-uniformity factor Mf |
| Example 1 | 0.201 |
| Comparative example 1 | 0.167 |
As can be seen from table 1, compared to the prior art, the microbubble generator of the present invention has a lower distribution non-uniformity factor, and thus has better distribution performance.
TABLE 2
| Detailed description of the preferred embodiments | Gas content rate |
| Example 1 | 4.683 |
| Comparative example 1 | 6.058 |
As can be seen from table 2, the utility model discloses a microbubble generator has great gas content rate, consequently has better distribution performance to simple structure, the installation of the processing of being convenient for is used.
TABLE 3
| Detailed description of the preferred embodiments | Average diameter |
| Example 1 | 9.02 |
| Comparative example 1 | 7.77 |
As can be seen from table 3, the microbubble generator of the present invention has a smaller bubble diameter, and thus has better mixing performance.
TABLE 4
| Detailed description of the preferred embodiments | Average rate |
| Example 1 | 0.63 |
| Comparative example 1 | 0.41 |
It can be seen by table 4, compare with prior art, the utility model discloses a microbubble generator has less bubble rising rate, and bubble dwell time is longer to lead to the double-phase area of contact of gas-liquid great, consequently has better mixing performance.
The above description describes in detail the preferred embodiments of the present invention, but the present invention is not limited to the details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications all belong to the protection scope of the present invention.
It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and the present invention does not need to describe any combination in order to avoid unnecessary repetition.
Claims (12)
1. The utility model provides a microbubble generator, its characterized in that, from supreme gas-liquid inlet section (3), choke (4), gradual expansion section (5) and gas-liquid outlet section (6) connection component down, wherein, the gas-liquid inlet section comprises lower straight tube section and the undergauge section on upper portion, gas-liquid inlet section bottom opening, gas-liquid outlet section top is equipped with the perforated plate, the lateral wall of choke is equipped with the gas pocket, the choke with the internal diameter ratio of the straight tube section of gas-liquid inlet section is 0.1 ~ 0.9: 1.
2. the microbubble generator as claimed in claim 1, wherein a bubble cap is provided at a bottom of the gas-liquid inlet section, the bubble cap is composed of a cylindrical bubble cap side wall, a bubble cap bottom and a circular bubble cap top plate, the bottom of the gas-liquid inlet section is connected to the bubble cap top plate, the bubble cap top plate is a porous plate, and an inner diameter ratio of the gas-liquid inlet section straight pipe section to the bubble cap is 0.1-0.9: 1.
3. the microbubble generator of claim 1 or 2, wherein the gas-liquid inlet section, the throat, the divergent section, and the gas-liquid outlet section have a height ratio of: 2-10: 1:1: 2-10.
4. The microbubble generator as claimed in claim 3, wherein the lower straight tube section of the gas-liquid inlet section is 0.1-0.5 of the height of the gas-liquid inlet section.
5. The microbubble generator as claimed in claim 3, wherein the gas-liquid inlet section has a height of 1 to 10mm, the throat has a height of 5 to 20mm, the divergent section has a height of 3 to 15mm, and the gas-liquid outlet section has a height of 10 to 40 mm.
6. The microbubble generator as claimed in claim 2, wherein the height of the bubble cap side wall is 1 to 50mm, the height of the bubble cap top plate to the bubble cap bottom is 1 to 30mm, and the bubble cap inner diameter is 1 to 50 mm.
7. The microbubble generator of claim 1 or 2, wherein the throat has 2-20 symmetrically distributed air holes on the side wall, and the diameter of the air holes is 1-5 mm.
8. The microbubble generator as claimed in claim 1, wherein the gas-liquid outlet section has an opening ratio of the perforated plate of 1% to 90%, and an equivalent diameter of the opening is 0.1 to 10 mm.
9. The microbubble generator as claimed in claim 2, wherein the top plate has an opening ratio of 1% to 90%, and an equivalent diameter of the opening is 0.1 to 10 mm.
10. The microbubble generator as claimed in claim 4, wherein the gas-liquid inlet section has a reduced diameter section of a tapered tube having a generatrix at an angle of 15 ° to 45 ° with respect to the axis, and the diverging section has a tapered tube having a generatrix at an angle of 5 ° to 20 ° with respect to the axis.
11. The microbubble generator of claim 1 or 2, wherein the gas-liquid inlet section, the throat and the diverging section are each movably connected to each other.
12. A hydrocarbon oil hydrogenation reactor, comprising a reactor shell, a material inlet at the bottom of the shell, a product outlet at the top of the shell, a catalyst bed layer arranged inside the reactor, and a flow baffle plate arranged at the lower part of the catalyst bed layer, wherein the flow baffle plate is provided with an opening, the microbubble generator of any one of claims 1 to 11 is positioned below the flow baffle plate, so that the top of the microbubble generator is arranged corresponding to the opening on the flow baffle plate.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115093880A (en) * | 2022-07-31 | 2022-09-23 | 中国石油化工股份有限公司 | Mixed bubble flow fluidized bed residual oil hydrogenation process and device |
| CN115959739A (en) * | 2021-10-09 | 2023-04-14 | 中国石油化工股份有限公司 | Oil-water separation device and oil-water separation system |
-
2020
- 2020-09-28 CN CN202022168484.4U patent/CN213644075U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115959739A (en) * | 2021-10-09 | 2023-04-14 | 中国石油化工股份有限公司 | Oil-water separation device and oil-water separation system |
| CN115093880A (en) * | 2022-07-31 | 2022-09-23 | 中国石油化工股份有限公司 | Mixed bubble flow fluidized bed residual oil hydrogenation process and device |
| CN115093880B (en) * | 2022-07-31 | 2024-03-19 | 中国石油化工股份有限公司 | Mixed bubble flow ebullated bed residual oil hydrogenation process and device |
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