CN104492599A - Treatment method of graphite dust - Google Patents
Treatment method of graphite dust Download PDFInfo
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- CN104492599A CN104492599A CN201410733494.4A CN201410733494A CN104492599A CN 104492599 A CN104492599 A CN 104492599A CN 201410733494 A CN201410733494 A CN 201410733494A CN 104492599 A CN104492599 A CN 104492599A
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- dust
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Abstract
The invention discloses a treatment method of graphite dust. The treatment method of the graphite dust comprises the following steps: introducing gas containing graphite dust into an electrostatic dust removal mechanism containing at least one electrode; and enabling the electrode to generate heat when the graphite dust attached to the electrode reaches a set quality, so that the graphite dust burns on the electrode, wherein the electrode material is a resistance wire material. By using the electrostatic adsorption principle, the graphite dust is collected, is attached to a resistance wire, and then is burnt, thus dust absorption, collection and pollution-free treatment of the graphite dust are achieved.
Description
Technical field
The invention belongs to waste recovery technical field, particularly relate to the method for the collection of a kind of graphite dust and nuisanceless disposal.
Background technology
Be fragile material due to graphite material and usually do not adopt cooling fluid in process, therefore in the mechanical processing process of graphite material, easily producing a large amount of dust-like chip.Not only there is adverse effect to the health of Field Force in the chip of dust-like graphite, and has electric conductivity due to graphite, and graphite dust easily causes the short circuit of around electric-control system or electrical network thus accidents caused.
The Collecting and dealing of graphite chip is one of major issue faced in graphite parts production process.Existing dedusting method mainly adopts the mode of physics dedusting namely to adopt dust catcher chip to be collected in certain container, or the method adopting liquid to filter the air containing graphite chip.In the collection process of graphite chip, not only require higher to efficiency of dust collection, the secondary pollution simultaneously also needing the graphite chip preventing from collecting to cause environment.For the graphite chip of collecting, its subsequent treatment Ye Shi enterprise problems faced.Due to the usual negligible amounts of graphite chip collected, the conventional processing mode such as to bury easily causes soil or water pollutions.Can realize Efficient Collection and the nuisanceless disposal of graphite chip, be the problem that machining graphite enterprise needs solution badly.
The principle of electrostatic precipitation is that dusty gas is ionized through high-voltage electrostatic field, and on grit and anion Binding protein after negative electricity, trend anode surface electric discharge and depositing, namely utilizes electrostatic field to make gas ionization thus make dust particles be adsorbed onto collecting method on electrode.Along with improving constantly of production intensity, people it is also proposed higher requirement for the serviceability of electrostatic precipitator.
Summary of the invention
The defect that the present invention exists to overcome prior art, the object of this invention is to provide the apparatus and method thoroughly, effectively can collecting and carry out the graphite dust after collection nuisanceless disposal for the graphite dust produced in current graphite material working angles.
A kind of graphite dust processing method, the gas of graphitiferous dust is passed into comprise in the electrostatic precipitation mechanism of at least one electrode, and when being attached to the graphite dust on electrode and reaching scheduled volume, electrode is generated heat, and then graphite dust is burnt on electrode, wherein, described electrode material is resistance wire material.
Electrostatic precipitation mechanism of the present invention is the mechanism that application electrostatic precipitation principle carries out control of dust, described in be contained in the colelctor electrode of the electrode in electrostatic precipitation mechanism as electrostatic precipitation, for adsorbing graphite dust.
Resistance wire material of the present invention preferably can make the material of graphite burning under the voltage of 110V ~ 380V.Those skilled in the art can select according to prior art, further, are preferably Fe-Cr-Al wire, nichrome wire, molybdenum filament, tantalum wire.
The processing method of graphite dust of the present invention preferably described in be attached to the graphite dust on electrode amount obtained by the resistance variations measuring electrode.
Because graphite is conductor, when graphite dust is adsorbed on electrode, can cause the change of electrode resistance, namely the knots modification of resistance value can reflect the deposition of graphite dust on electrode.
Further, the processing method of graphite dust of the present invention is carried out in following graphite dust treating apparatus:
A kind of graphite dust treating apparatus, comprise dust collection mechanism and dedusting mechanism, described dedusting mechanism comprises:
Dedusting passage;
At least one is arranged in the electrode of dedusting passage, and described electrode material is resistance wire material;
At least one inlet channel, described inlet channel is used for passing into gas containing graphite dust, combustion aiding gas or both mixing to dedusting passage;
For detecting the checkout gear of the dust concentration of dedusting channel exit;
At least one electric supply installation.
Graphite dust treating apparatus of the present invention comprises dedusting mechanism, and described dedusting mechanism is the mechanism that can carry out electrostatic precipitation and burning dedusting.The colelctor electrode of electrode as electrostatic precipitation being positioned at dedusting passage of the present invention, connects the positive pole of electric supply installation; The selection of the sparking electrode of described electrostatic precipitation and be set to the state of the art, those skilled in the art can carry out selecting and arranging according to prior art, it can be the corona wire be arranged in dedusting passage, also can be dedusting passage wall body etc., connects electric supply installation negative pole.
The present invention selects resistance wire material, and as electrode, it can play the effect of electrostatic precipitation under high pressure (herein the voltage of high end finger 20kV ~ 800kV), and graphite dust is adsorbed in electrode surface; When be adsorbed in the graphite dust on electrode reach a certain amount of after, electrode is then made to play the heat effect of resistance wire in low pressure (herein the voltage of low end finger 110V ~ 380V), make the graphite burning be attached on electrode, produce carbon dioxide, thus reach the object of graphite dust nuisanceless disposal.
Graphite dust treating apparatus of the present invention comprises one or more inlet channel, for passing into gas containing graphite dust, combustion aiding gas or both mixing to dedusting passage; Further, preferably include an inlet channel, for passing into gas containing graphite dust, combustion aiding gas or both mixing to dedusting passage.
The checkout gear of the dust concentration for detecting dedusting channel exit of the present invention can business be buied, or method obtains disclosed in prior art, and those skilled in the art can carry out selecting and arranging according to prior art.
Graphite dust process of the present invention comprises at least one electric supply installation, and described electric supply installation needs to provide 20kV ~ 800kV and 110V ~ 380V output voltage.When electric supply installation is for can be one, it can provide the electric supply installation of 20kV ~ 800kV and 110V ~ 380V output voltage; Also can comprise two electric supply installations, one of them electric supply installation can provide 20kV ~ 800kV output voltage, and another electric supply installation can provide 110V ~ 380V output voltage.
Graphite treatment device of the present invention preferred embodiment is: graphite treatment device of the present invention comprises controller further, described controller is used for the dust concentration obtaining dedusting channel exit from checkout gear, and control the voltage of electric supply installation according to dust concentration and reach predetermined value, and reach predetermined value according to the flow that dust concentration controls to pass into combustion aiding gas in dedusting passage.
Carrying out the process of graphite composite powder dedusting, first electric supply installation is made to carry out high voltage supply, graphite dust is made to be adsorbed on electrode by electrostatic interaction, when Electrostatic Absorption reaches capacity, the concentration of graphite dust of dedusting channel exit arrives predetermined value, control electric supply installation and be converted to low-voltage power supply by high voltage supply, and make combustion aiding gas pass in dedusting passage simultaneously, graphite dust is burnt.
Another preferred embodiment of graphite treatment device of the present invention is: described device comprises controller and resistance measurement device, and described resistance measurement device is used for the resistance of measurement electrode; Described controller is used for the variable quantity obtaining electrode resistance from resistance measurement device, and reach predetermined value according to the voltage of the control electric supply installation of the variable quantity of electrode resistance, and reach predetermined value according to the flow that the variable quantity of electrode resistance controls to pass into combustion aiding gas in dedusting passage.
Because graphite is conductor, when graphite dust is adsorbed on electrode, the change of electrode resistance can be caused, namely the knots modification of resistance value can reflect the deposition of graphite dust on electrode, when deposition reaches a timing, controller controls electric supply installation and is converted to low-voltage power supply by high voltage supply, and makes combustion aiding gas pass in dedusting passage simultaneously, and graphite dust is burnt.Preferably when resistance change is more than 80%, controller controls electric supply installation to carry out low-voltage power supply and controls to pass into combustion aiding gas in dedusting passage.
Combustion aiding gas of the present invention be preferably oxygen or oxygen content higher than 50% air.
The preferred described dust collection mechanism of graphite treatment device of the present invention comprises:
Compressed air source;
At least one dust collect plant, the negative pressure that described dust collect plant is produced by compressed air sucks graphite dust;
For detecting the checkout gear of the dust concentration in dust collect plant exit;
Controller, described controller is used for the dust concentration obtaining dust collect plant exit from checkout gear, and control whether to make the gas containing graphite dust enter dedusting passage according to dust concentration, and according to whether having the gas containing graphite dust to enter dedusting passage, controlling electric supply installation in dedusting mechanism and powering.
Dust collect plant of the present invention preferably includes suction port, and this suction port is free end, and for drawing graphite dust, the suction port other end is by the outlet of pipeline communication compressed air source, dedusting feeder connection and dust collect plant.Graphite dust self-dust-suction mouth sucks in dust collect plant by the negative pressure that dust collect plant utilizes compressed air to produce, and dust collect plant comprises the pipeline of the outlet being communicated with dedusting passage and dust collect plant, and pipeline is provided with valve.
The checkout gear of the dust concentration for detecting dust collect plant exit of the present invention can business be buied, or method obtains disclosed in prior art, and those skilled in the art can carry out selecting and arranging according to prior art.Described controller obtains the dust concentration in dust collect plant exit, and when the concentration of graphite dust meets discharge standard, controller controls suction port and dust collect plant outlet, and the air-flow containing graphite dust is directly disposed in air; When the concentration of graphite dust does not meet discharge standard, controller controls suction port and is communicated with dedusting feeder connection, makes the air-flow containing graphite dust enter dedusting passage and open electric supply installation, carries out electrostatic precipitation.Further, above-mentioned controller simultaneously for obtaining the dust concentration of dedusting channel exit from checkout gear, and controls the air-flow that whether passes in dedusting passage containing graphite dust according to dust concentration.
Controller in dedusting mechanism of the present invention and the controller of dust collection mechanism, can individually be arranged, and also accessible site is set to a controller.
Each gas channel of the present invention all by necessary pipeline communication, and is provided with the valve controlling its connectedness as required on pipeline.
Compared with prior art, the beneficial effect that the present invention has is: the collection of the dust-like dust produced in graphite mechanical processing process and nuisanceless disposal, the harm preventing from dirt from considering to be worth doing causing machine tool, operating personnel and the secondary pollution to environment.Utilize electrostatic absorption principle, graphite dust in compressed air is collected, and graphite dust is sticked on resistance wire, by heating resistance wire, make the graphite Thorough combustion be attached on resistance wire, and then realize the dust suction of graphite dust, collection and nuisanceless disposal.Thoroughly, effectively can collect graphite dust and nuisanceless disposal is carried out to the graphite chip dust after collecting.
Accompanying drawing explanation
Fig. 1 is a kind of schematic diagram of graphite dust treating apparatus;
Fig. 2 is graphite dust collection phase signal flow graph;
Fig. 3 is graphite dust combustion phases signal flow graph;
Fig. 4 is that the circuit of graphite dust treating apparatus connects sketch;
Reference numeral is as follows: 1 dust gathering arrester, 2 magnet pieces, 3 gas inlet tubes, 4 hoses, 5 two position three-way valve I, 6 dust concentration monitor I, 7 gas outlet tubes, 8 guiding tubes, 9 housings, 10 curve pipes, 11 resistance wires, 12 blast pipes, 13 dust concentration monitor II, 14 two position three-way valve II.
Detailed description of the invention
In following embodiment, dust concentration monitor used and dust concentration monitor II all adopt German Ford's generation standard type dust instrument, and model is PFM02; Resistance wire adopts Kanthal wire, and diameter is 1.5mm, and length is 5m; Curve pipe adopts stainless steel material, and resistance instrument adopts uncommon agate (SMART) AR3127, and the model that electric supply installation adopts bohr high voltage source Co., Ltd to produce is the power-supply system of Cygnus.
embodiment 1
A kind of graphite dust treating apparatus, a kind of graphite dust treating apparatus, comprises dust collection mechanism and dedusting mechanism.
Dedusting mechanism comprises: curve pipe 10; The guiding tube 8 be connected with curve pipe 10 porch; The blast pipe 12 be connected with curve pipe 8 exit; Be positioned at the resistance wire 11 of curve pipe; For detecting the dust concentration monitor II13 of the dust concentration of dedusting channel exit; Electric supply installation, wherein, electric supply installation positive pole connecting resistance silk 11, negative pole connects curve pipe 10; Resistance instrument.
Dust collection mechanism comprises: compressed air source; As the dust gathering arrester 1 of dust suction inlet, dust gathering arrester 1, external stability magnet piece 2; Dust gathering arrester 1 connects hose 4, and hose 4 communicates with gas inlet tube 3, and gas inlet tube 3 is provided with two position three-way valve I6 and two position three-way valve II14; Two position three-way valve I6 is had to connect gas outlet tube 7 and guiding tube 8; Two position three-way valve II14 connects compressed air source and source of oxygen by pipeline; For detecting the dust concentration monitor I6 of the dust concentration at gas outlet tube 7 place.
Described device comprises controller, and described control unit comprises control unit I and control unit II, and described control unit I is used for the dust concentration obtaining gas outlet tube 7 from dust concentration monitor I6, and when dust concentration is equal to or greater than 1g/m
3time control the gas arrival curve pipe 10 that two position three-way valve I5 makes containing graphite dust, and when two position three-way valve I5 makes the gas arrival curve pipe 10 containing graphite dust, in control dedusting mechanism, electric supply installation carries out high voltage supply; Described control unit II is used for the variable quantity obtaining electrode resistance from resistance instrument, and when resistance change is more than 80%, control unit II controls electric supply installation to carry out low-voltage power supply and control two position three-way valve II14 passing into oxygen in dedusting passage; When the testing result of dust concentration monitor II13 is that dust concentration is less than 1g/m
3time, control unit I controls two position three-way valve I5 and two position three-way valve II14, and the gas containing graphite dust is discharged from gas outlet tube 7.
Utilize said apparatus to carry out the method for graphite dust collection and nuisanceless disposal, comprise the steps:
Step 1: pass into the Compressed Gas that pressure is 1MPa ~ 10MPa in gas inlet tube 3, the passage of gas inlet tube 3 to gas outlet tube 7 is opened; Compressed air, by producing negative pressure during gas inlet tube 3 in hose 4, namely produces the gas flowed from dust gathering arrester 1 to gas inlet tube 3, and gas is by after two position three-way valve I5, and the testing result through dust concentration monitor I6 is that dust concentration is less than 1g/m
3discharged by gas outlet tube 7;
Step 2: when the testing result of dust concentration monitor I6 is that dust concentration is less than 1g/m
3time, continue step 1; When the testing result of dust concentration monitor I6 is that dust concentration is equal to or greater than 1g/m
3time, continue step 3;
Step 3: control unit controls the passage that two position three-way valve I5 closes gas inlet tube 3 to gas outlet tube 7; Open the passage of between gas inlet tube 3 and guiding tube 8 simultaneously; Gas containing graphite dust will enter dedusting mechanism by guiding tube 8;
Step 4: control unit controls electric supply installation and carries out high voltage supply, and setting voltage is 40kV ~ 100kV, forms electrostatic field between resistance wire 11 and curve pipe 10, namely utilizes electrostatic precipitation principle to the another process dust removal process by curve pipe 10; Gas containing graphite dust is by guiding tube 8 arrival curve pipe 10, and under the effect of electrostatic field, the graphite dust in gas is adsorbed by resistance wire 11;
Step 5: the gas after dedusting is discharged by blast pipe 12, when gas passes through the dust concentration monitor II in blast pipe 12, testing result dust concentration is not more than 1g/m
3time, continue step 4; Dust concentration is equal to or greater than 1g/m
3time, carry out step 6;
Step 6; Voltage between electric supply installation increase resistance wire and curve pipe, to 100kV ~ 500kV, improves the dust collecting capability of resistance wire;
Step 7: resistance instrument detects the resistance value of resistance wire, when the knots modification of resistance wire resistance reaches 80%, control unit controls two position three-way valve II14, closes the Compressed Gas flowing to curve pipe 10, and passes into the oxygen that pressure is 10MPa ~ 30MPa; Control electric supply installation applies 110V ~ 380V voltage to resistance wire two ends simultaneously, make the graphite dust Thorough combustion that resistance wire adheres to;
Step 8: dust concentration monitor II13 detects the gas by blast pipe 12, if the dust concentration that dust concentration monitor II12 detects is greater than 1g/m
3, then electric supply installation improves the voltage at resistance wire two ends to 380V, and the pressure improving oxygen is to 30MPa, makes the graphite dust Thorough combustion that resistance wire adheres to.
More than show and describe general principle of the present invention, principal character and advantage of the present invention.The technical staff of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and description just illustrates principle of the present invention; the present invention also has various changes and modifications without departing from the spirit and scope of the present invention, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection domain is defined by appending claims and equivalent thereof.
Claims (8)
1. a graphite dust processing method, the gas of graphitiferous dust is passed into comprise in the electrostatic precipitation mechanism of at least one electrode, and when being attached to the graphite dust on electrode and reaching scheduled volume, electrode is generated heat, and then graphite dust is burnt on electrode, wherein, described electrode material is resistance wire material.
2. method according to claim 1, is characterized in that: described resistance wire material is the material that can make graphite burning under the voltage of 110V ~ 380V.
3. method according to claim 1, is characterized in that: described in be attached to the graphite dust on electrode amount obtained by the resistance variations measuring electrode.
4. method according to claim 1, is characterized in that: described method is carried out in graphite dust treating apparatus, and described device comprises dedusting mechanism described in dust collection mechanism and dedusting mechanism and comprises:
Dedusting passage;
At least one is arranged in the electrode of dedusting passage, and described electrode material is resistance wire material;
At least one inlet channel, described inlet channel is used for passing into gas containing graphite dust, combustion aiding gas or both mixing to dedusting passage;
For detecting the checkout gear of the dust concentration of dedusting channel exit;
At least one electric supply installation.
5. method according to claim 4, is characterized in that: described electric supply installation is for providing the electric supply installation of 20kV ~ 800kV and 110V ~ 380V output voltage.
6. the method according to claim 4 or 5, it is characterized in that: described graphite dust treating apparatus comprises controller, described controller is used for the dust concentration obtaining dedusting channel exit from checkout gear, and control the voltage of electric supply installation according to dust concentration and reach predetermined value, and reach predetermined value according to the flow that dust concentration controls to pass into combustion aiding gas in dedusting passage.
7. method according to claim 4, is characterized in that: described graphite dust treating apparatus comprises controller and resistance measurement device, and described resistance measurement device is used for the resistance of measurement electrode; Described controller is used for the variable quantity obtaining electrode resistance from resistance measurement device, and reach predetermined value according to the voltage of the control electric supply installation of the variable quantity of electrode resistance, and reach predetermined value according to the flow that the variable quantity of electrode resistance controls to pass into combustion aiding gas in dedusting passage.
8. method according to claim 4, is characterized in that: described dust collection mechanism comprises:
Compressed air source;
At least one dust collect plant, the negative pressure that described dust collect plant is produced by compressed air sucks graphite dust;
For detecting the checkout gear of the dust concentration in dust collect plant exit;
Controller, described controller is used for the dust concentration obtaining dust collect plant exit from checkout gear, and control whether to make the gas containing graphite dust enter dedusting passage according to dust concentration, and according to whether having the gas containing graphite dust to enter dedusting passage, controlling electric supply installation in dedusting mechanism and powering.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106807712A (en) * | 2017-03-13 | 2017-06-09 | 江苏伟建工具科技有限公司 | A kind of device of the rearmounted despumation of high speed steel wire production line |
| CN114602922A (en) * | 2022-04-18 | 2022-06-10 | 恒达富士电梯有限公司 | Dust removal method and device for elevator cooperative production line |
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