CN104984825A - Friction electric separation method and device for micro-fine particle damp materials - Google Patents
Friction electric separation method and device for micro-fine particle damp materials Download PDFInfo
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- CN104984825A CN104984825A CN201510423980.0A CN201510423980A CN104984825A CN 104984825 A CN104984825 A CN 104984825A CN 201510423980 A CN201510423980 A CN 201510423980A CN 104984825 A CN104984825 A CN 104984825A
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Abstract
The invention relates to a friction electric separation method and a device for micro-fine particle damp materials. The micro-fine particle damp materials enter a dryer to contact with molecular sieve particles therein to realize the drying of the materials; meanwhile, the materials are contacted and rubbed with friction rods in the dryer to crush and scatter the material particles; the materials with different components have charges with opposite polarities; the materials, after the drying and the frictional electrification, enter a high-pressure electrostatic field to realize the separation of the electrified materials with different polarities; and when the humidity of molecular sieves is saturated, the molecular sieve particles are regenerated. A negative-pressure material absorbing method is helpful to mix and disperse the micro-fine particle damp materials; the molecular sieve dryer treats the micro-fine particle damp materials; the moisture on the surfaces of the materials is absorbed through the molecular sieves to realize the drying of the damp materials; and the friction rods improve the particle friction collision effect, and realize the efficient frictional electrification.
Description
Technical field
The present invention relates to microfine moist material friction electrical selection method and device, belong to Mineral Processing Engineering field, be mainly used in the multicomponent physical separation of microfine moist material, the fine granule material friction electrical selection that can also be used under wet environment is separated.
Background technology
Use friction electrical selection technology can realize the physical separation of the various ingredients in fine granule material.When fine granule material is deposited in wet environment, can absorb the moisture in air, cause material to stick or reunite, in pneumatic convey particle process, intergranular friction collision probability reduces, and frictional electrification efficiency declines.Meanwhile, after microfine particle surface adsorption moisture, the dielectric constant of particle surface is increased, particle conductive capability strengthens, after particle friction is charged, more easily Charger transfer or transmission occur in interparticle contact process, this will affect the friction electrical selection effect of charged particle.
Summary of the invention
In order to overcome above-mentioned the deficiencies in the prior art, the invention provides microfine moist material friction electrical selection method and device, can, in frictional electrification process, microfine moist material surface moisture be absorbed by mole sieve drier, reduce the dielectric constant of particle; Simultaneously with sieve particle frictional impact process, moist material is disperseed and fragmentation, increase the collision probability of material and sieve particle, strengthen tribocharge charging effect, thus improve the separative efficiency of the friction electrical selection of microfine moist material.
The present invention is obtained by following technical proposals: a kind of microfine moist material friction electrical selection method, comprises the following steps:
Blower fan work forms negative pressure will be arranged in the microfine moist material inlet nozzle mixing dispersion of stock chest; Microfine moist material enters the drying that drier and the sieve particle making contact be positioned at wherein realize material, and material and the friction-bar collision friction in drier make that material particles is broken to be disperseed simultaneously, opposite polarity electric charge on the material web of different component; Material after super-dry and frictional electrification enters in high-voltage electrostatic field, realizes the separation of different in nature charged material; When the moisture-saturated of molecular sieve, sieve particle is regenerated.
A kind of microfine moist material friction electrical selection device, the nozzle comprise roots blower, being connected with roots blower, to be arranged on below nozzle and with the stock chest be connected in the middle part of nozzle, for separating of the high-pressure electrostatic isolation field of charged material, be arranged on the splicing plate below high-pressure electrostatic isolation field, to the switch board that roots blower controls, regulate the pressure regulator of high-pressure electrostatic isolation field voltage, and provide the high voltage source of electric energy for high-pressure electrostatic isolation field; Also comprise the mole sieve drier for carrying out drying and frictional electrification to microfine moist material be located between nozzle and high pressure separation chamber, described mole sieve drier is fitted with industrial air heater and the dehumidification tube that can provide regeneration condition to molecular sieve wherein.
Described mole sieve drier is the hollow tube-shape of upper and lower side opening, sieve particle and friction-bar is provided with in drier, friction-bar is cylindric, length direction along drier arranges many groups, often organizing friction-bar is equilateral triangle distribution, one end of friction-bar is inserted in the wall hole, limit of mole sieve drier, and the other end extends to beyond wall; Drier both ends open is equipped with and can prevents sieve particle from fleeing from and not affect the air distribution plate that material passes through smoothly; Import and the outlet of described mole sieve drier are equipped with control valve, industrial air heater is connected by arm between inlet control valve with mole sieve drier, moisture discharge pipe is connected between discharge control valve with mole sieve drier, industrial air heater arm and moisture discharge pipe all arrange control valve, when dehumidifying to material, inlet control valve and the discharge control valve of mole sieve drier are opened, and the control valve on industrial air heater arm and moisture discharge pipe is closed; When regenerating molecular sieve, closure molecule sieve drier inlet control valve and discharge control valve, make the control valve on industrial air heater arm and moisture discharge pipe be in open mode.
Two structures in parallel are arranged to by described mole sieve drier, two mole sieve driers all connect industrial air heater, when a drier completes mass transport, frictional electrification, its molecular sieve adsorption material particles moisture, another drier completes the regenerative process of sieve particle, two mole sieve driers hocket, and realize the continuous drying of material.
The invention has the beneficial effects as follows: adopt negative-pressure suction method, contribute to mixing and the dispersion of microfine moist material; Mole sieve drier process microfine moist material, by molecular sieve adsorption material surface moisture, achieves the drying of moist material, improves particle friction collision effect, achieve efficient frictional electrification by friction-bar.
Accompanying drawing explanation
Fig. 1 is the example structure schematic diagram of microfine moist material friction electrical selection device of the present invention.
Fig. 2 is mole sieve drier internal structure schematic diagram.
Fig. 3 is that the A of Fig. 2 is to structural representation.
In accompanying drawing, the mark of each parts is as follows: 1. switch board, 2. roots blower, 3. stock chest, 4. negative-pressure suction pipe, 5. positive plate, 6. rewinding plate, 7. high voltage source, 8. pressure regulator, 9. negative plate, 10. control valve B, 11. control valve D, 12. mole sieve drier B, 13. control valve F, 14. control valve H, 15. control valve G, 16. control valve E, 17. industrial air heaters, 18. mole sieve drier A, 19. control valve C, 20. control valve A, 21. nozzles, 22. air distribution plates, 23. friction-bar, 24. molecular sieves.
Detailed description of the invention
Microfine moist material friction electrical selection method of the present invention, when switch board 1 regulates roots blower 2 to operate, in pipeline, the compressed air of flowing forms suction function in negative-pressure suction pipe 4, microfine moist material in absorption stock chest 3 enters in nozzle 21, microfine moist material fully mixes dispersion under airflow function, but easily stick due to material humidity or reunite, in pneumatic convey particle process, intergranular friction collision probability reduces, frictional electrification efficiency declines, simultaneously, after microfine particle surface adsorption moisture, the dielectric constant of particle surface is increased, particle conductive capability strengthens, after particle friction is charged, more easily Charger transfer or transmission is there is in interparticle contact process, this will affect the friction electrical selection effect of charged particle, for this reason, invention increases and dry step is carried out to moist material, under the rolling action of gas, moist material enters in mole sieve drier 12 as shown in Figure 1, molecular sieve 24 particle and moist material making contact, adsorb the moisture on its surface, material particles is obtained dry, reduce dielectric constant, its conductive capability is reduced, after material particles is charged, not easily produces charge transfer or transfer, meanwhile, friction-bar 23 makes material particles be broken and disperses, and improves particle friction collision probability, strengthens material particle friction charging effect, dry charged material enters through pressure regulator 8 and controls in the high-voltage electrostatic field that high voltage source 7 formed between positive plate 5 and negative plate 9, material particles with opposite polarity electric charge is subject to the absorption of opposite polarity electrode plate, not charged material falls from centre and is collected by rewinding plate 6, realizes the friction electrical selection of microfine moist material.
Microfine moist material friction electrical selection device of the present invention, as shown in accompanying drawing 1,2 and 3, this device comprises roots blower 1, nozzle 21, stock chest 3, high-pressure electrostatic isolation field, splicing plate 6, switch board 1, pressure regulator 8, high voltage source 7 and mole sieve drier 18; Roots blower 1 is connected with switch board 1, the air outlet of roots blower 1 connects one end of nozzle 21 by pipeline, the other end of nozzle 21 to be linked in sequence mole sieve drier 18,12 and high-pressure electrostatic isolation field by pipeline, the middle part of nozzle 21 vertically connects a negative-pressure suction pipe 4, and the bottom of negative-pressure suction pipe 4 is connected with stock chest 3; Described mole sieve drier 18,12 is the hollow tube-shape of upper and lower side opening, molecular sieve 24 particle and friction-bar 23 is provided with in drier, friction-bar 23 is cylindric, length direction along drier arranges many groups, often organize friction-bar 23 distribution in equilateral triangle, one end of friction-bar 23 is inserted in the wall hole, limit of mole sieve drier 18,12, and the other end extends to beyond wall; Drier both ends open is equipped with and can prevents molecular sieve 24 particle from fleeing from and not affect the air distribution plate 22 that material particles passes through smoothly; The import of described mole sieve drier 18,12 is provided with control valve A20, B10, outlet is provided with control valve E16, F13, industrial air heater 17 is connected respectively by arm between inlet control valve A20, B10 with mole sieve drier 18,12, moisture discharge pipe is connected respectively between discharge control valve E16, F13 with mole sieve drier 18,12, between industrial air heater 18 mole sieve drier 18,12, control valve C19, D11 are set, moisture discharge pipe are arranged control valve G15, H14; Described high-voltage electrostatic field adopts parallel plate electrode structure, and wherein one piece is positive plate 5, and another block is negative plate 9, and parallel plate electrode is connected with pressure regulator 8 and high voltage source 7, and charged material is adsorbed by two-plate respectively, and not charged material is collected by rewinding plate 6.
When dehumidifying to material, the inlet control valve A20 of mole sieve drier 18 and discharge control valve E16 is opened, closed by control valve G15, H14 on the inlet control valve B10 of mole sieve drier 12, discharge control valve F13 and industrial air heater control valve C19, D11 and moisture discharge pipe, material carries out drying and frictional electrification by mole sieve drier 18; If the moisture that the molecular sieve 24 in mole sieve drier 18 adsorbs reaches capacity, closed control valve A20 and E16, open industrial air heater control valve C19 and the moisture discharge pipe control valve G15 of this side, hot-air enters mole sieve drier 18 through control valve, molecular sieve 24 is regenerated, moist hot air after process discharges system through control valve G15, meanwhile, the inlet control valve B10 and the discharge control valve F13 that open mole sieve drier 12 carry out drying to material, two mole sieve driers 18 and 12 are used alternatingly, and enable this device continuous operation;
When mole sieve drier is one group, also can reach the drying to fine moist material and frictional electrification, just the drying to material and the regeneration to molecular sieve need hocket.
Claims (4)
1. a microfine moist material friction electrical selection method, is characterized in that, comprises the following steps: blower fan work forms negative pressure will be arranged in the microfine moist material inlet nozzle mixing dispersion of stock chest; Microfine moist material enters the drying that drier and the sieve particle making contact be positioned at wherein realize material, and material and the friction-bar collision friction in drier make that material particles is broken to be disperseed simultaneously, opposite polarity electric charge on the material web of different component; Material after super-dry and frictional electrification enters in high-voltage electrostatic field, realizes the separation of different in nature charged material; When the moisture-saturated of molecular sieve, sieve particle is regenerated.
2. a microfine moist material friction electrical selection device, the nozzle comprise roots blower, being connected with roots blower, to be arranged on below nozzle and with the stock chest be connected in the middle part of nozzle, for separating of the high-pressure electrostatic isolation field of charged material, be arranged on the splicing plate below high-pressure electrostatic isolation field, to the switch board that roots blower controls, regulate the pressure regulator of high-pressure electrostatic isolation field voltage, and provide the high voltage source of electric energy for high-pressure electrostatic isolation field; It is characterized in that, also comprise the mole sieve drier for carrying out drying and frictional electrification to microfine moist material be located between nozzle and high pressure separation chamber, described mole sieve drier is fitted with industrial air heater and the dehumidification tube that can provide regeneration condition to molecular sieve wherein.
3. a kind of microfine moist material friction electrical selection device according to claim 2, it is characterized in that, described mole sieve drier is the hollow tube-shape of upper and lower side opening, sieve particle and friction-bar is provided with in drier, friction-bar is cylindric, and the length direction along drier arranges many groups, and often organizing friction-bar is equilateral triangle distribution, one end of friction-bar is inserted in the wall hole, limit of mole sieve drier, and the other end extends to beyond wall; Drier both ends open is equipped with and can prevents sieve particle from fleeing from and not affect the air distribution plate that material passes through smoothly; Import and the outlet of described mole sieve drier are equipped with control valve, industrial air heater is connected by arm between inlet control valve with mole sieve drier, moisture discharge pipe is connected between discharge control valve with mole sieve drier, industrial air heater arm and moisture discharge pipe all arrange control valve, when dehumidifying to material, inlet control valve and the discharge control valve of mole sieve drier are opened, and the control valve on industrial air heater arm and moisture discharge pipe is closed; When regenerating molecular sieve, closure molecule sieve drier inlet control valve and discharge control valve, make the control valve on industrial air heater arm and moisture discharge pipe be in open mode.
4. a kind of microfine moist material friction electrical selection device according to claim 3, it is characterized in that, two structures in parallel are arranged to by described mole sieve drier, two mole sieve driers all connect industrial air heater, when a drier completes mass transport, frictional electrification, its molecular sieve adsorption material particles moisture, another drier completes the regenerative process of sieve particle, two mole sieve driers hocket, and realize the continuous drying of material.
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| CN201510423980.0A CN104984825B (en) | 2015-07-20 | 2015-07-20 | Microfine moist material friction electrical selection method and device |
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| CN201510423980.0A CN104984825B (en) | 2015-07-20 | 2015-07-20 | Microfine moist material friction electrical selection method and device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105921276A (en) * | 2016-05-23 | 2016-09-07 | 中国矿业大学 | Fine particle rotational flow type electric agglomeration dust removing and collecting device |
| CN107121264A (en) * | 2017-06-20 | 2017-09-01 | 大连理工大学 | Experimental system and experimental method that a kind of controllable micron particles of humiture are collided with different surfaces |
| CN109261362A (en) * | 2018-10-16 | 2019-01-25 | 韩颜涛 | Feed separation equipment based on Electrostatic Absorption |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105921276A (en) * | 2016-05-23 | 2016-09-07 | 中国矿业大学 | Fine particle rotational flow type electric agglomeration dust removing and collecting device |
| CN107121264A (en) * | 2017-06-20 | 2017-09-01 | 大连理工大学 | Experimental system and experimental method that a kind of controllable micron particles of humiture are collided with different surfaces |
| CN107121264B (en) * | 2017-06-20 | 2018-12-25 | 大连理工大学 | A kind of experimental system and experimental method of micron particles and different surfaces collision |
| CN109261362A (en) * | 2018-10-16 | 2019-01-25 | 韩颜涛 | Feed separation equipment based on Electrostatic Absorption |
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| CN104984825B (en) | 2017-08-25 |
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