CN111729621B - Be applied to miniature pulse fluidized bed device of superfine powder fluidization - Google Patents
Be applied to miniature pulse fluidized bed device of superfine powder fluidization Download PDFInfo
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- CN111729621B CN111729621B CN202010529242.5A CN202010529242A CN111729621B CN 111729621 B CN111729621 B CN 111729621B CN 202010529242 A CN202010529242 A CN 202010529242A CN 111729621 B CN111729621 B CN 111729621B
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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 provides a micro pulse fluidized bed device applied to fluidization of ultrafine powder; the method comprises the following steps: the device comprises a circuit (1), a first discharge electrode (2), a second discharge electrode (3), a discharge cup (4) and a fluidized bed body (9); the circuit (1) is connected with the first discharge electrode (2) and the second discharge electrode (3); the discharge cup (4) is provided with a discharge cup end cover (8) and is connected by screw threads to form a discharge cavity; the first discharge electrode (2) and the second discharge electrode (3) are arranged in the middle of the discharge cup (4). The invention does not need to adopt a complex gas supply system of the traditional fluidized bed, has simple structure and smaller volume, is easy to adjust the airflow pulse by adjusting the discharge power and frequency of the circuit and is easy to be applied to the fluidization process of ultrafine powder. The invention provides a novel pulse fluidized bed device, which is free of a complex gas supply and pulse gas switching control device, has no moving part, is simple in structure, is easy to regulate and control, and is convenient to combine with a miniature chemical system.
Description
Technical Field
The invention relates to the technical field of chemical machinery; in particular to a micro pulse fluidized bed device applied to fluidization of ultrafine powder.
Background
The device can promote the fluidization state of sticky particles, prevent or reduce particle agglomeration in the fluidized bed and improve the heat and mass transfer rate among different particle beds. Usually, the electromagnetic valve is adopted to completely cut off or partially cut off the gas flow to realize gas pulse, the mechanical mode often has the limitations of size and frequency, the gas supply system is more complicated, the response speed is poor, and the micro chemical system which is increasingly developed is difficult to adapt.
Therefore, the novel pulse fluidized bed device utilizes discharge generated plasma synthetic jet as a pulse source, has no moving part, combines the pulse gas generating device and the fluidized bed into a whole, does not need a complex gas supply system, is particularly beneficial to the miniaturization of the fluidized bed, controls the flow speed, the pressure and the frequency of the output pulse gas jet by adjusting a discharge power curve, and shows good regulation and control performance.
Disclosure of Invention
The invention aims to provide a micro pulse fluidized bed device applied to fluidization of ultrafine powder.
The invention is realized by the following technical scheme:
the invention relates to a micro pulse fluidized bed device applied to fluidization of ultrafine powder, which comprises: the device comprises a circuit 1, a first discharge electrode 2, a second discharge electrode 3, a discharge cup 4 and a fluidized bed body 9;
wherein the content of the first and second substances,
the circuit 1 is connected with a first discharge electrode 2 and a second discharge electrode 3;
the discharge cup 4 is provided with a discharge cup end cover 8 and is connected by screw threads to form a discharge cavity;
the first discharge electrode 2 and the second discharge electrode 3 are arranged in the middle of the discharge cup 4.
Preferably, a discharge gap exists between the first discharge electrode 2 and the second discharge electrode 3.
Preferably, the center of the bottom of the discharge cup 4 is provided with an air inlet hole.
Preferably, the elastic sheet 6 covers the air inlet holes.
Preferably, one end of the elastic sheet 6 is fixed at the bottom of the discharge cup 4 through a screw 5, and the other end of the elastic sheet is pressed and sealed with the bottom sealing edge 7 of the discharge cavity under the action of elastic force of the metal elastic sheet.
Preferably, a jet hole is arranged in the center of the discharge chamber end cover 8.
Preferably, the outlet of the jet hole is provided with a sealing groove.
Preferably, the sealing groove is provided with a layer of wire mesh 11.
Preferably, a sealing ring 12 is disposed on the wire mesh 11.
Preferably, the bottom of the fluidized bed body 9 is connected with the discharge cup end cover 8 through a screw, and the gas sealing is realized through a sealing ring 12; the bottom of the fluidized bed is provided with a bed material area 13; the fluidized bed outlet is provided with a sealing end cover 10.
When the micro pulse fluidized bed device is used, the circuit 1 is connected with the first discharge electrode 2 and the second discharge electrode 3 to generate charging and pulse discharging; the discharge gap between the first discharge electrode 2 and the second discharge electrode 3 generates an arc; in the time interval from the beginning to the end of pulse discharge, the electric arc releases a large amount of heat energy to form high air pressure in the discharge gap, and the high air pressure is conducted to a surrounding low air pressure area and converted into gas kinetic energy. The gas in the discharge cup 4 is sprayed out through a small hole at the end cover 8 of the discharge cup to form a gas pulse jet flow, the jet flow passes through the wire mesh 11 to enter the bottom of the fluidized bed and drive particles to move upwards, and the particle bed layer is fluidized under the push of the gas. When the jet pulse is finished, vacuum is generated in the discharge cup, the elastic sheet 6 at the bottom of the discharge cup 4 is opened under the action of atmospheric pressure, outside air flows into the discharge cup 4, meanwhile, part of gas flows back from the jet hole of the discharge cup end cover 8, particles are gradually restored to a fixed bed state from a fluidized state, when the air pressure in the discharge cup 4 and the elasticity of the elastic sheet 6 are balanced with the outside air pressure, the elastic sheet 6 is restored to a sealed state, next discharge is started, and the direct current circuit is connected with the second needle electrode to provide energy injection; under the regulation and control of high-frequency discharge, the particle bed layer is oscillated, which is favorable for depolymerization of the viscous particles and fluidization of the viscous particles.
The working principle of the invention is as follows: the circuit 1 is connected with a first discharge electrode 2 and a second discharge electrode 3, an electric arc is generated in a discharge gap between the first discharge electrode 2 and the second discharge electrode 3, and gas pulse jet flow is generated through a central small hole of a discharge cup end cover 8 under the action mechanism of electricity-heat-kinetic energy conversion; the gas pulse jet flow enters the fluidized bed body 9 through the wire mesh 11, and material particles in a bed material area 13 arranged at the bottom of the fluidized bed are fluidized; after the gas pulse jet flow occurs, vacuum is generated in the discharge cup 4, the elastic sheet 6 at the bottom of the discharge cup 4 generates displacement under the action of the external atmospheric pressure, the external gas flows into the discharge cup 4, the gas pressure in the discharge cup 4 rises along with the inflow of the external airflow, and when the gas pressure in the discharge cup 4 and the elasticity of the elastic sheet 6 are balanced with the external atmospheric pressure, the elastic sheet 6 restores the initial state; after the gas pulse jet flow is finished, the particles in the fluidized bed body 9 are converted into a fixed state from a fluidized state, and the bed layer generates primary oscillation; and then the next period of discharge is performed.
The method of the invention has the following advantages:
(1) the fluidized bed structure comprises a fluidizing section and a suspending section; the fluidized bed outlet is provided with a sealing end cover. The invention does not need to adopt a complex gas supply system of the traditional fluidized bed, has simple structure and smaller volume, is easy to adjust the airflow pulse by adjusting the discharge power and frequency of the circuit and is easy to be applied to the fluidization process of ultrafine powder.
(2) The invention provides a novel pulse fluidized bed device, which is free of a complex gas supply and pulse gas switching control device, has no moving part, is simple in structure, is easy to regulate and control, and is convenient to combine with a miniature chemical system.
(3) The invention provides a micro pulse fluidized bed device which comprises a circuit, a discharge cup and a fluidized bed, does not need a complex gas supply system and an electromagnetic regulating valve, and can obtain different gas pulse jet flows by regulating discharge power, discharge duration and frequency so as to meet different working modes or adapt to various working conditions.
Drawings
FIG. 1 is a schematic structural diagram of a micro-pulse fluidized bed device according to the present invention;
reference numerals: 1-a circuit; 2-a first discharge electrode; 3-a second discharge electrode; 4-a discharge cup; 5-a screw; 6-an elastic sheet; 7-sealing edge; 8-discharge cup end cap; 9-fluidized bed body; 10-fluidized bed end caps; 11-wire mesh; 12-sealing ring.
Detailed Description
The present invention will be described in detail with reference to specific examples. It should be noted that the following examples are only illustrative of the present invention, but the scope of the present invention is not limited to the following examples.
Examples
The embodiment relates to a micro pulse fluidized bed device applied to fluidization of ultrafine powder, the structure of which is shown in the attached figure 1: the device comprises: the device comprises a circuit 1, a first discharge electrode 2, a second discharge electrode 3, a discharge cup 4 and a fluidized bed body 9;
wherein the content of the first and second substances,
the circuit 1 is connected with a first discharge electrode 2 and a second discharge electrode 3;
the discharge cup 4 is provided with a discharge cup end cover 8 and is connected by screw threads to form a discharge cavity;
the first discharge electrode 2 and the second discharge electrode 3 are disposed in the middle of the discharge cup 4.
A discharge gap is present between the first discharge electrode 2 and the second discharge electrode 3.
An air inlet hole is formed in the center of the bottom of the discharge cup 4.
And an elastic sheet 6 covers the upper part of the air inlet hole.
One end of the elastic sheet 6 is fixed at the bottom of the discharge cup 4 through a screw 5, and the other end of the elastic sheet is tightly pressed and sealed with the bottom sealing edge 7 of the discharge cavity under the action of the elastic force of the metal elastic sheet.
And a jet hole is arranged in the center of the discharge cavity end cover 8.
And a sealing groove is arranged at the outlet of the jet hole.
The sealing groove is provided with a layer of wire mesh 11.
A sealing ring 12 is arranged on the wire mesh 11.
The bottom of the fluidized bed body 9 is connected with the discharge cup end cover 8 through a screw, and gas sealing is realized through a sealing ring 12; the bottom of the fluidized bed is provided with a bed material area 13; the fluidized bed outlet is provided with a sealing end cover 10.
When the micro pulse fluidized bed device is used, the circuit 1 is connected with the first discharge electrode 2 and the second discharge electrode 3 to generate charging and pulse discharging; the discharge gap between the first discharge electrode 2 and the second discharge electrode 3 generates an arc; in the time interval from the beginning to the end of pulse discharge, the electric arc releases a large amount of heat energy to form high air pressure in the discharge gap, and the high air pressure is conducted to a surrounding low air pressure area and converted into gas kinetic energy. The gas in the discharge cup 4 is sprayed out through a small hole at the end cover 8 of the discharge cup to form a gas pulse jet flow, the jet flow passes through the wire mesh 11 to enter the bottom of the fluidized bed and drive particles to move upwards, and the particle bed layer is fluidized under the push of the gas. When the jet pulse is finished, vacuum is generated in the discharge cup, the elastic sheet 6 at the bottom of the discharge cup 4 is opened under the action of atmospheric pressure, outside air flows into the discharge cup 4, meanwhile, part of gas flows back from the jet hole of the discharge cup end cover 8, particles are gradually restored to a fixed bed state from a fluidized state, when the air pressure in the discharge cup 4 and the elasticity of the elastic sheet 6 are balanced with the outside air pressure, the elastic sheet 6 is restored to a sealed state, next discharge is started, and the direct current circuit is connected with the second needle electrode to provide energy injection; under the regulation and control of high-frequency discharge, the particle bed layer is oscillated, which is favorable for depolymerization of the viscous particles and fluidization of the viscous particles.
The working principle of the invention is as follows: the circuit 1 is connected with a first discharge electrode 2 and a second discharge electrode 3, an electric arc is generated in a discharge gap between the first discharge electrode 2 and the second discharge electrode 3, and gas pulse jet flow is generated through a central small hole of a discharge cup end cover 8 under the action mechanism of electricity-heat-kinetic energy conversion; the gas pulse jet flow enters the fluidized bed body 9 through the wire mesh 11, and material particles in a bed material area 13 arranged at the bottom of the fluidized bed are fluidized; after the gas pulse jet flow occurs, vacuum is generated in the discharge cup 4, the elastic sheet 6 at the bottom of the discharge cup 4 generates displacement under the action of the external atmospheric pressure, the external gas flows into the discharge cup 4, the gas pressure in the discharge cup 4 rises along with the inflow of the external airflow, and when the gas pressure in the discharge cup 4 and the elasticity of the elastic sheet 6 are balanced with the external atmospheric pressure, the elastic sheet 6 restores the initial state; after the gas pulse jet flow is finished, the particles in the fluidized bed body 9 are converted into a fixed state from a fluidized state, and the bed layer generates primary oscillation; and then the next period of discharge is performed.
The method of the invention has the following advantages:
(1) the fluidized bed structure comprises a fluidizing section and a suspending section; the fluidized bed outlet is provided with a sealing end cover. The invention does not need to adopt a complex gas supply system of the traditional fluidized bed, has simple structure and smaller volume, is easy to adjust the airflow pulse by adjusting the discharge power and frequency of the circuit and is easy to be applied to the fluidization process of ultrafine powder.
(2) The invention provides a novel pulse fluidized bed device, which is free of a complex gas supply and pulse gas switching control device, has no moving part, is simple in structure, is easy to regulate and control, and is convenient to combine with a miniature chemical system.
(3) The invention provides a micro pulse fluidized bed device which comprises a circuit, a discharge cup and a fluidized bed, does not need a complex gas supply system and an electromagnetic regulating valve, and can obtain different gas pulse jet flows by regulating discharge power, discharge duration and frequency so as to meet different working modes or adapt to various working conditions.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention.
Claims (1)
1. A micro-impulse fluidized bed device for fluidization of ultra-fine powder, which is characterized in that the device comprises: the device comprises a circuit (1), a first discharge electrode (2), a second discharge electrode (3), a discharge cup (4) and a fluidized bed body (9);
wherein the content of the first and second substances,
the circuit (1) is connected with the first discharge electrode (2) and the second discharge electrode (3);
the discharge cup (4) is provided with a discharge cup end cover (8) and is connected by screw threads to form a discharge cavity;
the first discharge electrode (2) and the second discharge electrode (3) are arranged in the middle of the discharge cup (4), a discharge gap is formed between the first discharge electrode (2) and the second discharge electrode (3), an air inlet hole is formed in the center of the bottom of the discharge cup (4), an elastic sheet (6) is covered above the air inlet hole, one end of the elastic sheet (6) is fixed to the bottom of the discharge cup (4) through a screw (5), the other end of the elastic sheet is tightly pressed and sealed with a bottom sealing edge (7) of a discharge cavity under the action of elastic force of a metal elastic sheet, a jet hole is arranged in the center of a discharge cup end cover (8), a sealing groove is formed in an outlet of the jet hole, a layer of metal wire mesh (11) is arranged in the sealing groove, a sealing ring (12) is arranged on the metal wire mesh (11), and the bottom of the fluidized bed body (9) is connected with the discharge cup end cover (8) through screws, gas sealing is realized through a sealing ring (12); the bottom of the fluidized bed is provided with a bed material area (13); the fluidized bed outlet is provided with a sealing end cover (10).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010529242.5A CN111729621B (en) | 2020-06-11 | 2020-06-11 | Be applied to miniature pulse fluidized bed device of superfine powder fluidization |
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| CN202010529242.5A CN111729621B (en) | 2020-06-11 | 2020-06-11 | Be applied to miniature pulse fluidized bed device of superfine powder fluidization |
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| CN111729621B true CN111729621B (en) | 2021-09-21 |
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| CN201052458Y (en) * | 2007-04-30 | 2008-04-30 | 天津科技大学 | Local gas pulsation type fluid bed device |
| CN201532096U (en) * | 2009-11-17 | 2010-07-21 | 山东天力干燥设备有限公司 | Pulse combustion drying machine |
| CN104320900A (en) * | 2014-11-13 | 2015-01-28 | 厦门大学 | Air supplementing type plasma jet flow generator |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007130613A2 (en) * | 2006-05-04 | 2007-11-15 | Sri International | Multiarc discharge moving bed reactor system |
| CN103285780B (en) * | 2012-02-24 | 2015-07-08 | 北京低碳清洁能源研究所 | Magnetic induction reactor of slurry bubble bed |
| CN103945626A (en) * | 2013-01-21 | 2014-07-23 | 孙国莉 | Air blowing apparatus |
| CN103501572B (en) * | 2013-10-11 | 2017-04-19 | 中国航空工业集团公司哈尔滨空气动力研究所 | Jet-type plasma actuator and flow control method thereof |
| TW201622808A (en) * | 2014-07-22 | 2016-07-01 | 巴斯夫歐洲公司 | Process for modification of particles |
| CN204014247U (en) * | 2014-09-02 | 2014-12-10 | 厦门大学 | A kind of acceleration jet flow generating apparatus |
| CN206385100U (en) * | 2016-12-16 | 2017-08-08 | 四川雷鸣环保装备有限公司 | Pulsed circle fluidized-bed gasification furnace |
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- 2020-06-11 CN CN202010529242.5A patent/CN111729621B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201052458Y (en) * | 2007-04-30 | 2008-04-30 | 天津科技大学 | Local gas pulsation type fluid bed device |
| CN201532096U (en) * | 2009-11-17 | 2010-07-21 | 山东天力干燥设备有限公司 | Pulse combustion drying machine |
| CN104320900A (en) * | 2014-11-13 | 2015-01-28 | 厦门大学 | Air supplementing type plasma jet flow generator |
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