CN104159385B - A kind of static elimination method of polyethylene reactor - Google Patents
A kind of static elimination method of polyethylene reactor Download PDFInfo
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- CN104159385B CN104159385B CN201410319108.7A CN201410319108A CN104159385B CN 104159385 B CN104159385 B CN 104159385B CN 201410319108 A CN201410319108 A CN 201410319108A CN 104159385 B CN104159385 B CN 104159385B
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Abstract
The static elimination method of a kind of polyethylene reactor, including static eraser, static eraser is made up of multiple consumer appliances, and consumer appliance is arranged on polyethylene reactor.The controller of consumer appliance connects cation generator and anion generator, and the outfan of cation generator and anion generator is connected on sparking electrode, and sparking electrode gos deep into inside polyethylene reactor.Controller is connected to electrostatic detector, and the electrode probe of electrostatic detector gos deep into inside polyethylene reactor, and electrode probe connects change-over circuit, and change-over circuit connects controller.When build-up of static charges in polyethylene reactor, controller cut-offs according to the electric charge state modulator cation generator detected or anion generator, neutralizes electrostatic charge in polyethylene reactor.Electrostatic detector is monitored in real time, and eliminostatic step cycle carries out, and can guarantee that the electrostatic charge in polyethylene reactor maintains in the reasonable scope.
Description
Technical field
A kind of method that the present invention relates to eliminostatic, the static elimination method of especially a kind of polyethylene reactor.
Background technology
Electrostatic problem is the prominent technical barrier of long-standing problem gas-phase polyethylene production process.The existence of electrostatic has had a strong impact on the normal operating of gas-phase polyethylene reactor.Sheeting is caused to cause that gas-phase polyethylene reactor shutdowns has accounted for total stop frequency 70% by electrostatic according to statistics, the hidden danger serious threat that electrostatic the brings long period even running of device.In existing gas-phase polyethylene reactor, for the method eliminating the commonly used a kind of water filling note alcohol of electrostatic, but water and alcohol are all catalyst poison, once regulate bad, it is easy to produce negative effects.
Summary of the invention
In order to solve the deficiencies in the prior art, the present invention proposes a kind of static elimination method being installed in polyethylene reactor, this method can determine the electric charge of the release opposite polarity of sparking electrode according to the polarity of electrostatic charge in polyethylene reactor, to reach to neutralize the purpose of electrostatic charge.
The present invention adopts the following technical scheme that
A kind of static elimination method of polyethylene reactor, including static eraser, static eraser is made up of multiple consumer appliances, consumer appliance is arranged on polyethylene reactor, described consumer appliance includes sparking electrode and armored cassette, controller, cation generator and anion generator is had in described armored cassette, controller connects cation generator and anion generator respectively, the outfan of cation generator and anion generator is connected on sparking electrode, and described sparking electrode gos deep into inside polyethylene reactor；Controller is connected to electrostatic detector, and electrostatic detector includes electrode probe and change-over circuit, and electrode probe gos deep into inside polyethylene reactor, and electrode probe connects change-over circuit, and change-over circuit connects controller；
Eliminostatic step based on above-mentioned static eraser is as follows:
Step 1: electrostatic detector detects the electrostatic charge parameter in polyethylene reactor in real time, and sends electrostatic charge parameter to controller；
Step 2: controller processes and judges the electrostatic charge parameter that electrostatic detector transmits；If electrostatic potential is between-800V to+800V, repeat step 1；If electrostatic potential exceedes+800V, perform step 3；If electrostatic potential exceedes-800V, perform step 4；
Step 3: controller controls anion generator conducting, the spray point ejected electron of sparking electrode, neutralizes the electrostatic charge in polyethylene reactor, until when the electrostatic potential that detects of electrostatic detector is lower than+200V, controller controls anion generator and disconnects, and repeats step 1；
Step 4: controller controls the conducting of cation generator, cation released by the spray point of sparking electrode, neutralizes the electrostatic charge in polyethylene reactor, until when the electrostatic potential of electrostatic detector detection is lower than-200V, controller controls cation generator and disconnects, and repeats step 1.
The static elimination method of a kind of polyethylene reactor of the present invention, in described step 1, the electrostatic potential in the electrode probe detection polyethylene reactor of electrostatic detector, exports the electric current electrostatic charge parameter signal of 4～20mA to controller after converted circuit conversion.
The static elimination method of a kind of polyethylene reactor of the present invention, in described step 3, anion generator utilizes internal pulse and the electrical equipment that vibrates that low-voltage is risen to negative direct current high voltage, the spray point tip high direct voltage utilizing sparking electrode produces high corona, releases substantial amounts of electronics；The electronics released is repelled by the spray point with negative high voltage, and to polyethylene reactor internal diffusion, and the electrostatic charge in positive polarity is by the attraction of the spray point with negative high voltage, and is neutralized rapidly.
The static elimination method of a kind of polyethylene reactor of the present invention, in described step 4, cation generator utilizes internal pulse and the electrical equipment that vibrates that low-voltage rises to direct current positive high voltage, the spray point tip high direct voltage utilizing sparking electrode produces high corona, releases substantial amounts of cation；The cation released is repelled by the spray point with positive high voltage, and to polyethylene reactor internal diffusion, the electrostatic charge in negative polarity is by the attraction of the spray point with positive high voltage, and is neutralized rapidly.
Adopt the Advantageous Effects that technique scheme obtains as follows:
A kind of static elimination method of polyethylene reactor, including static eraser, static eraser is made up of multiple consumer appliances, consumer appliance is arranged on the diverse location of polyethylene reactor, described consumer appliance includes sparking electrode and armored cassette, controller, cation generator and anion generator is had in described armored cassette, controller connects cation generator and anion generator, the outfan of cation generator and anion generator is connected on sparking electrode, and described sparking electrode gos deep into inside polyethylene reactor；Controller is connected to electrostatic detector, and electrostatic detector includes electrode probe, change-over circuit, and electrode probe gos deep into inside polyethylene reactor, and electrode probe connects change-over circuit, and change-over circuit connects controller.When electrostatic detector detects the build-up of static charges in polyethylene reactor, controller controls cut-offfing of cation generator or anion generator according to the charge polarity that detects, neutralizes electrostatic charge in polyethylene reactor.
Spray point pedestal is wrapped with between insulation sleeve, friction top and spray point pedestal and the wall of polyethylene reactor and pretends have sealing gasket and insulation spacer.Electric discharge pedestal is avoided to contact with the wall of polyethylene reactor and make wall charged.
Overvoltage protector, earth leakage protector, protection cation generator, anion generator, controller and electrostatic detector, it is to avoid overtension breakdown device it is also equipped with in armored cassette.
Monitoring in real time based on electrostatic detector in the static elimination method of above-mentioned static eraser, eliminostatic step cycle carries out, and can guarantee that the electrostatic charge in polyethylene reactor maintains in the reasonable scope.
Accompanying drawing explanation
Fig. 1 is the static eraser scheme of installation of polyethylene reactor.
Fig. 2 is the static eraser internal structure connection diagram of polyethylene reactor.
Fig. 3 is the flow chart of static elimination method.
Detailed description of the invention
It is described further in conjunction with 1 to 3 pair of the specific embodiment of the present invention of accompanying drawing:
A kind of static eraser of polyethylene reactor, including multiple consumer appliances, consumer appliance is arranged on the diverse location of polyethylene reactor, described consumer appliance includes sparking electrode and armored cassette, controller, cation generator and anion generator is had in described armored cassette 9, controller connects cation generator and anion generator, and the outfan of cation generator and anion generator is connected on sparking electrode, and described sparking electrode gos deep into inside polyethylene reactor.Controller is connected to electrostatic detector, electrostatic detector includes electrode probe, change-over circuit, electrode probe gos deep into inside polyethylene reactor, electrode probe connects change-over circuit, the data that electrode probe detects are converted into the electrostatic charge polarity in polyethylene reactor and electricity by change-over circuit, and send polarity and information about power to controller.
Sparking electrode includes spray point 1 and spray point pedestal 2, and spray point 1 is positioned at the front end of spray point pedestal 2, and the rear end of spray point pedestal 2 is connected on the outfan of cation generator and anion generator.Stating and have the through hole adaptive with sparking electrode on the wall of polyethylene reactor, spray point pedestal 2 is fixed in through hole by friction top 7, and spray point 1 gos deep into inside polyethylene reactor.Through hole on polyethylene reactor wall outwardly forms connectivity port 6, and friction top 7 is connected in connectivity port 6, and friction top 7 is outer with connectivity port 6 equipped with sealing lid 8.Spray point pedestal 2 is wrapped with between insulation sleeve 3, friction top 7 and spray point pedestal 2 and the wall of polyethylene reactor and pretends have sealing gasket 4 and insulation spacer 5.Insulation sleeve and insulating trip adopt high insulant to make, and stop sparking electrode and contact with the wall of polyethylene reactor, it is prevented that the generation of electric shock accidents.Preferably polytetrafluoroethylene, makes insulation sleeve and insulating trip obtain resistance to voltage levels up to 20kV.
Armored cassette is connected to power supply, and power supply adopts 24V unidirectional current, power supply connection controller, cation generator and anion generator, it is provided that electric current.Power source internal is connected to transformator, regulator rectifier circuit, is 24V unidirectional current by the 220V convert alternating current of input.
Overvoltage protector, earth leakage protector, protection cation generator, anion generator, controller and electrostatic detector, it is to avoid overtension breakdown device it is also equipped with in armored cassette.
Spray point is conducting metal, and plasma diffusing W,Mo cation generator and anion generator produced, in polyethylene reactor, neutralizes electrostatic charge.Spray point matrix adopts metal material, plays the effect of protection and fixing spray point.In order to ensure the discharge effect of spray point, the preferred tungsten of material of spray point.For guaranteeing the service life of spray point, it is equilateral triangle 3 spray points of arrangement in spray point matrix front end.
The static eraser of polyethylene reactor includes multiple consumer appliance, and consumer appliance is arranged on the diverse location of polyethylene reactor, and the connection of each consumer appliance is both connected in electrostatic detector.Consumer appliance works simultaneously, can eliminate rapidly the electrostatic in polyethylene reactor.
The electrode probe of electrostatic detector can detect that the electrostatic potential of-16kV～+16kV in polyethylene reactor, exports the electric current of 4～20mA to controller.The input direct-current of cation generator is 1～24V, and output negative direct current high voltage is-4kV～-12kV.The input direct-current of cation generator is 1～24V, and the direct current positive high voltage of output is 4kV～12kV.
Electrostatic detector detects when in polyethylene reactor, electrostatic potential is between-800V～+800V, belongs to safe static scope, it is not necessary to start static eraser.In polyethylene reactor, electrostatic potential is between-200V～+200V, for optimum operation scope.
Eliminostatic step based on above-mentioned static eraser is as follows:
Step 1: electrostatic detector detects the electrostatic charge parameter in polyethylene reactor in real time, and sends electrostatic charge parameter to controller；
Electrostatic potential in the electrode probe detection polyethylene reactor of electrostatic detector, exports the electric current electrostatic charge parameter signal of 4～20mA to controller after converted circuit conversion.
Step 2: controller processes and judges the electrostatic charge parameter that electrostatic detector transmits；If electrostatic potential is between-800V～+800V, repeat step 1；If electrostatic potential exceedes+800V, perform step 3；If electrostatic potential exceedes-800V, perform step 4；
Step 3: controller controls anion generator conducting, the spray point ejected electron of sparking electrode, neutralizes the electrostatic charge in polyethylene reactor, until when the electrostatic potential that detects of electrostatic detector is lower than+200V, controller controls anion generator and disconnects, and repeats step 1；
Low-voltage is risen to negative direct current high voltage by pulse and vibration electrical equipment within anion generator utilization, utilizes the spray point tip high direct voltage of sparking electrode to produce high corona, releases substantial amounts of electronics；The electronics released is repelled by the spray point with negative high voltage, and to polyethylene reactor internal diffusion, and the electrostatic charge in positive polarity is by the attraction of the spray point with negative high voltage, and is neutralized rapidly.
Step 4: controller controls the conducting of cation generator, cation released by the spray point of sparking electrode, neutralizes the electrostatic charge in polyethylene reactor, until when the electrostatic potential of electrostatic detector detection is lower than-200V, controller controls cation generator and disconnects, and repeats step 1；
Low-voltage is risen to direct current positive high voltage by pulse and vibration electrical equipment within the utilization of cation generator, utilizes the spray point tip high direct voltage of sparking electrode to produce high corona, releases substantial amounts of cation；The cation released is repelled by the spray point with positive high voltage, and to polyethylene reactor internal diffusion, the electrostatic charge in negative polarity is by the attraction of the spray point with positive high voltage, and is neutralized rapidly.
In the static elimination method of static eraser, electrostatic detector is monitored in real time, and eliminostatic step cycle carries out, and can guarantee that the electrostatic charge in polyethylene reactor maintains in the reasonable scope.
Certainly; described above it is only presently preferred embodiments of the present invention; the present invention is not limited to enumerate above-described embodiment; should be noted that; any those of ordinary skill in the art are under the guidance of this specification; made all equivalent replacement, obvious variant, all fall within the essential scope of this specification, ought to be subject to the protection of the present invention.
Claims (4)
1. the static elimination method of a polyethylene reactor, it is characterized in that, including static eraser, static eraser is made up of multiple consumer appliances, consumer appliance is arranged on polyethylene reactor, described consumer appliance includes sparking electrode and armored cassette, controller, cation generator and anion generator is had in described armored cassette, controller connects cation generator and anion generator respectively, the outfan of cation generator and anion generator is connected on sparking electrode, and described sparking electrode gos deep into inside polyethylene reactor；
Controller is connected to electrostatic detector, and electrostatic detector includes electrode probe and change-over circuit, and electrode probe gos deep into inside polyethylene reactor, and electrode probe connects change-over circuit, and change-over circuit connects controller；
Eliminostatic step based on above-mentioned static eraser is as follows:
Step 1: electrostatic detector detects the electrostatic charge parameter in polyethylene reactor in real time, and sends electrostatic charge parameter to controller；
Step 2: controller processes and judges the electrostatic charge parameter that electrostatic detector transmits；If electrostatic potential is between-800V to+800V, repeat step 1；If electrostatic potential exceedes+800V, perform step 3；If electrostatic potential exceedes-800V, perform step 4；
Step 3: controller controls anion generator conducting, the spray point ejected electron of sparking electrode, neutralizes the electrostatic charge in polyethylene reactor, until when the electrostatic potential that detects of electrostatic detector is lower than+200V, controller controls anion generator and disconnects, and repeats step 1；
Step 4: controller controls the conducting of cation generator, cation released by the spray point of sparking electrode, neutralizes the electrostatic charge in polyethylene reactor, until when the electrostatic potential of electrostatic detector detection is lower than-200V, controller controls cation generator and disconnects, and repeats step 1.
2. the static elimination method of a kind of polyethylene reactor according to claim 1, it is characterized in that, in described step 1, the electrostatic potential in the electrode probe detection polyethylene reactor of electrostatic detector, exports the electric current electrostatic charge parameter signal of 4～20mA to controller after converted circuit conversion.
3. the static elimination method of a kind of polyethylene reactor according to claim 1, it is characterized in that, in described step 3, anion generator utilizes internal pulse and the electrical equipment that vibrates that low-voltage is risen to negative direct current high voltage, the spray point tip high direct voltage utilizing sparking electrode produces high corona, releases substantial amounts of electronics；The electronics released is repelled by the spray point with negative high voltage, and to polyethylene reactor internal diffusion, and the electrostatic charge in positive polarity is by the attraction of the spray point with negative high voltage, and is neutralized rapidly.
4. the static elimination method of a kind of polyethylene reactor according to claim 1, it is characterized in that, in described step 4, cation generator utilizes internal pulse and the electrical equipment that vibrates that low-voltage rises to direct current positive high voltage, the spray point tip high direct voltage utilizing sparking electrode produces high corona, releases substantial amounts of cation；The cation released is repelled by the spray point with positive high voltage, and to polyethylene reactor internal diffusion, the electrostatic charge in negative polarity is by the attraction of the spray point with positive high voltage, and is neutralized rapidly.
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| CN104483770B (en) * | 2015-01-05 | 2019-01-22 | 合肥京东方光电科技有限公司 | Anti-static device and FPD manufacturing equipment |
| CN105451424B (en) * | 2015-12-30 | 2018-02-09 | 上海安平静电科技有限公司 | A kind of ion blower or ion bar with electrostatic detection and feedback function |
| CN107640374A (en) * | 2016-12-01 | 2018-01-30 | 中国石油化工股份有限公司 | Polyester slice packaging operation electrostatic measurement and removing method |
| CN110913546A (en) * | 2018-09-18 | 2020-03-24 | 中国石油化工股份有限公司 | Easy-to-maintain bipolar electrostatic eliminator |
| CN109688682A (en) * | 2018-12-30 | 2019-04-26 | 上海安平静电科技有限公司 | A kind of direct current powder charger-eliminator and eliminate system |
| TWI749572B (en) * | 2020-06-02 | 2021-12-11 | 帆宣系統科技股份有限公司 | Active fluid static elimination system |
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