CN104159385A - Static elimination method for polyethylene reactor - Google Patents
Static elimination method for polyethylene reactor Download PDFInfo
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- CN104159385A CN104159385A CN201410319108.7A CN201410319108A CN104159385A CN 104159385 A CN104159385 A CN 104159385A CN 201410319108 A CN201410319108 A CN 201410319108A CN 104159385 A CN104159385 A CN 104159385A
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Abstract
The invention provides a static elimination method for a polyethylene reactor. The method involves a static elimination device. The static elimination device is composed of static eliminators. The static eliminators are installed on the polyethylene reactor. A controller of the static eliminators is connected with a positive ion generator and a negative ion generator. The output end of the positive ion generator and the output end of the negative ion generator are connected to a discharge electrode. The discharge electrode extends deeply into the polyethylene reactor. The controller is connected with a static detector. An electrode probe of the static detector deeply extends into the polyethylene reactor and is connected with a switching circuit. The switching circuit is connected with the controller. When static charges are accumulated in the polyethylene reactor, the controller controls the positive ion generator or the negative ion generator to be switched on or switched off according to detected charge parameters, and therefore the static charges in the polyethylene reactor are neutralized. The static detector monitors the situation in real time, the static elimination step is conducted cyclically, and it can be guaranteed that the static charges in the polyethylene reactor are kept within a reasonable range.
Description
Technical field
The present invention relates to a kind of method that static is eliminated, especially a kind of static removing method of polyethylene reactor.
Background technology
Electrostatic problem is the outstanding technical barrier that perplexs for a long time gas-phase polyethylene production process.The existence of static has had a strong impact on the normal running of gas-phase polyethylene reactor.By static, cause knot sheet and cause gas-phase polyethylene reactor shutdowns to account for total stop frequency 70% according to statistics, the hidden danger serious threat that static brings the long period even running of device.In existing gas-phase polyethylene reactor, for eliminating static, generally adopted a kind of method of water filling note alcohol, but water and alcohol are all catalyst poison, once regulate badly, are 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 removing method being installed in polyethylene reactor, this method can be determined the electric charge of the release opposite polarity of sparking electrode according to the polarity of electrostatic charge in polyethylene reactor, to reach the object of neutralize static charges.
The present invention adopts following technical scheme:
A kind of static removing method of polyethylene reactor, comprise static eraser, static eraser is comprised of a plurality of consumer appliances, consumer appliance is arranged on polyethylene reactor, described consumer appliance comprises sparking electrode and armored cassette, in described armored cassette, there are controller, cation generator and anion generator, controller connects respectively cation generator and anion generator, the output of cation generator and anion generator is connected on sparking electrode, and described sparking electrode gos deep into polyethylene reactor inside; Controller is connected with electrostatic detector, and electrostatic detector comprises electrode probe, change-over circuit, and electrode probe gos deep into polyethylene reactor inside, and electrode probe connects change-over circuit, and change-over circuit connects controller;
Static removal process 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 send static parameter to controller;
Step 2: controller is processed the static parameter that judgement electrostatic detector transmits; If electrostatic potential at-800V between+800V time, repeating step 1; If during surpass+800V of electrostatic potential, execution step 3; If during surpass-800V of electrostatic potential, execution step 4;
Step 3: controller is controlled anion generator conducting, the spray point ejected electron of sparking electrode, in and the electrostatic charge in polyethylene reactor, until the electrostatic potential that electrostatic detector detects is during lower than+200V, controller is controlled anion generator and is disconnected, repeating step 1;
Step 4: controller is controlled the conducting of cation generator, the spray point of sparking electrode is emitted cation, in and the electrostatic charge in polyethylene reactor, until the electrostatic potential that electrostatic detector detects is during lower than-200V, controller is controlled cation generator and is disconnected, repeating step 1.
The static removing method of a kind of polyethylene reactor of the present invention, in described step 1, the electrode probe of electrostatic detector detects the electrostatic potential in polyethylene reactor, changes the electric current electrostatic charge parameter signal of backward controller output 4～20mA through change-over circuit.
The static removing method of a kind of polyethylene reactor of the present invention, the pulse of anion generator utilization inside in described step 3, vibration electrical equipment rise to negative direct current high voltage by low-voltage, utilize the most advanced and sophisticated high direct voltage of spray point of sparking electrode to produce high corona, emit a large amount of electronics; The electronics of emitting is repelled by the spray point with negative high voltage, spread, and the electrostatic charge that is positive polarity is subject to the attraction with the spray point of negative high voltage, and is neutralized rapidly in polyethylene generator.
The static removing method of a kind of polyethylene reactor of the present invention, the pulse of cation generator utilization inside in described step 4, vibration electrical equipment rise to direct current positive high voltage by low-voltage, utilize the most advanced and sophisticated high direct voltage of spray point of sparking electrode to produce high corona, emit a large amount of cations; The cation of emitting is repelled by the spray point with positive high voltage, in polyethylene generator, spreads, and the electrostatic charge that is negative polarity is subject to the attraction with the spray point of positive high voltage, and is neutralized rapidly.
The useful technique effect that adopts technique scheme to obtain is as follows:
A kind of static removing method of polyethylene reactor, comprise static eraser, static eraser is comprised of a plurality of consumer appliances, consumer appliance is arranged on the diverse location of polyethylene reactor, described consumer appliance comprises sparking electrode and armored cassette, in described armored cassette, there are controller, cation generator and anion generator, controller connects cation generator and anion generator, the output of cation generator and anion generator is connected on sparking electrode, and described sparking electrode gos deep into polyethylene reactor inside; Controller is connected with electrostatic detector, and electrostatic detector comprises electrode probe, change-over circuit, and electrode probe gos deep into polyethylene reactor inside, and electrode probe connects change-over circuit, and change-over circuit connects controller.During build-up of static charges in electrostatic detector detects polyethylene reactor, controller is controlled cut-offfing of cation generator or anion generator according to the charge polarity detecting, in and electrostatic charge in polyethylene reactor.
Spray point pedestal is wrapped with insulating case, between friction top and the wall of spray point pedestal and polyethylene reactor, has pretended sealing gasket and insulation spacer.The pedestal of avoiding discharging contacts and makes wall charged with the wall of polyethylene reactor.
Overvoltage protector, earth leakage protector are also installed in armored cassette, and protection cation generator, anion generator, controller and electrostatic detector, avoid overtension breakdown device.
Electrostatic detector Real-Time Monitoring in static removing method based on above-mentioned static eraser, static removal process loops, 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 removing method.
Embodiment
1 to 3 pair of the specific embodiment of the present invention is described further by reference to the accompanying drawings:
A kind of static eraser of polyethylene reactor, comprise a plurality of consumer appliances, consumer appliance is arranged on the diverse location of polyethylene reactor, described consumer appliance comprises sparking electrode and armored cassette, in described armored cassette 9, there are controller, cation generator and anion generator, controller connects cation generator and anion generator, and the output of cation generator and anion generator is connected on sparking electrode, and described sparking electrode gos deep into polyethylene reactor inside.Controller is connected with electrostatic detector, electrostatic detector comprises electrode probe, change-over circuit, electrode probe gos deep into polyethylene reactor inside, electrode probe connects change-over circuit, the data that change-over circuit is surveyed electrode probe are converted into electrostatic charge polarity and the electric weight in polyethylene reactor, and send polarity and information about power to controller.
Sparking electrode comprises 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 output of cation generator and anion generator.State the through hole having on the wall of polyethylene reactor with sparking electrode adaptation, spray point pedestal 2 is fixed in through hole by friction top 7, and spray point 1 gos deep into polyethylene reactor inside.Through hole on polyethylene reactor wall is the outstanding connectivity port 6 that forms outwards, and friction top 7 is connected in connectivity port 6, friction top 7 and the outer seal cover 8 that is equipped with in connectivity port 6.Spray point pedestal 2 is wrapped with insulating case 3, between friction top 7 and the wall of spray point pedestal 2 and polyethylene reactor, has pretended sealing gasket 4 and insulation spacer 5.Insulating case and insulating trip adopt high insulating material to make, and stop sparking electrode and contact with the wall of polyethylene reactor, prevent the generation of electric shock accidents.Preferably polytetrafluoroethylene, makes insulating case and insulating trip obtain withstand voltage level up to 20kV.
Armored cassette is connected with power supply, power acquisition 24V direct current, and power supply is communicated with controller, cation generator and anion generator, and electric current is provided.Power supply inside is connected to transformer, regulator rectifier circuit, and the 220V alternating current of input is transformed to 24V direct current.
Overvoltage protector, earth leakage protector are also installed in armored cassette, and protection cation generator, anion generator, controller and electrostatic detector, avoid overtension breakdown device.
Spray point is conducting metal, and the ion of cation generator and anion generator generation is discharged in polyethylene reactor, carrys out neutralize static charges.Spray point matrix adopting metal material, plays protection and the fixedly effect of spray point.In order to ensure the discharge effect of spray point, the preferred tungsten of the material of spray point.For guaranteeing the useful life of spray point, at spray point matrix front end, be equilateral triangle 3 spray points of arranging.
The static eraser of polyethylene reactor comprises a plurality of consumer appliances, and consumer appliance is arranged on the diverse location of polyethylene reactor, and each consumer appliance connection is all connected in electrostatic detector.Consumer appliance is worked simultaneously, can eliminate rapidly the static in polyethylene reactor.
The electrostatic potential of can detect in polyethylene reactor-16kV～+ 16kV of the electrode probe of electrostatic detector, to the electric current of controller output 4～20mA.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 in polyethylene reactor electrostatic potential between-800V～+ 800V time, belongs to safe static scope, without starting static eraser.Electrostatic potential, between-200V～+ 200V, is optimum operation scope in polyethylene reactor.
Static removal process 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 send static parameter to controller;
The electrode probe of electrostatic detector detects the electrostatic potential in polyethylene reactor, changes the electric current electrostatic charge parameter signal of backward controller output 4～20mA through change-over circuit.
Step 2: controller is processed the static parameter that judgement electrostatic detector transmits; If electrostatic potential is between-800V～+ 800V time, repeating step 1; If during surpass+800V of electrostatic potential, execution step 3; If during surpass-800V of electrostatic potential, execution step 4;
Step 3: controller is controlled anion generator conducting, the spray point ejected electron of sparking electrode, in and the electrostatic charge in polyethylene reactor, until the electrostatic potential that electrostatic detector detects is during lower than+200V, controller is controlled anion generator and is disconnected, repeating step 1;
The pulse of anion generator utilization inside, vibration electrical equipment rise to negative direct current high voltage by low-voltage, utilize the most advanced and sophisticated high direct voltage of spray point of sparking electrode to produce high corona, emit a large amount of electronics; The electronics of emitting is repelled by the spray point with negative high voltage, spread, and the electrostatic charge that is positive polarity is subject to the attraction with the spray point of negative high voltage, and is neutralized rapidly in polyethylene generator.
Step 4: controller is controlled the conducting of cation generator, the spray point of sparking electrode is emitted cation, in and the electrostatic charge in polyethylene reactor, until the electrostatic potential that electrostatic detector detects is during lower than-200V, controller is controlled cation generator and is disconnected, repeating step 1;
The pulse of cation generator utilization inside, vibration electrical equipment rise to direct current positive high voltage by low-voltage, utilize the most advanced and sophisticated high direct voltage of spray point of sparking electrode to produce high corona, emit a large amount of cations; The cation of emitting is repelled by the spray point with positive high voltage, in polyethylene generator, spreads, and the electrostatic charge that is negative polarity is subject to the attraction with the spray point of positive high voltage, and is neutralized rapidly.
Electrostatic detector Real-Time Monitoring in the static removing method of static eraser, static removal process loops, and can guarantee that the electrostatic charge in polyethylene reactor maintains in the reasonable scope.
Certainly; more than explanation is only preferred embodiment 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; that makes is allly equal to alternative, obvious variant, within all dropping on the essential scope of this specification, ought to be subject to protection of the present invention.
Claims (4)
1. the static removing method of a polyethylene reactor, it is characterized in that, comprise static eraser, static eraser is comprised of a plurality of consumer appliances, consumer appliance is arranged on polyethylene reactor, described consumer appliance comprises sparking electrode and armored cassette, in described armored cassette, there are controller, cation generator and anion generator, controller connects respectively cation generator and anion generator, the output of cation generator and anion generator is connected on sparking electrode, and described sparking electrode gos deep into polyethylene reactor inside;
Controller is connected with electrostatic detector, and electrostatic detector comprises electrode probe, change-over circuit, and electrode probe gos deep into polyethylene reactor inside, and electrode probe connects change-over circuit, and change-over circuit connects controller;
Static removal process 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 send static parameter to controller;
Step 2: controller is processed the static parameter that judgement electrostatic detector transmits; If electrostatic potential at-800V between+800V time, repeating step 1; If during surpass+800V of electrostatic potential, execution step 3; If during surpass-800V of electrostatic potential, execution step 4;
Step 3: controller is controlled anion generator conducting, the spray point ejected electron of sparking electrode, in and the electrostatic charge in polyethylene reactor, until the electrostatic potential that electrostatic detector detects is during lower than+200V, controller is controlled anion generator and is disconnected, repeating step 1;
Step 4: controller is controlled the conducting of cation generator, the spray point of sparking electrode is emitted cation, in and the electrostatic charge in polyethylene reactor, until the electrostatic potential that electrostatic detector detects is during lower than-200V, controller is controlled cation generator and is disconnected, repeating step 1.
2. the static removing method of a kind of polyethylene reactor according to claim 1, it is characterized in that, in described step 1, the electrode probe of electrostatic detector detects the electrostatic potential in polyethylene reactor, changes the electric current electrostatic charge parameter signal of backward controller output 4～20mA through change-over circuit.
3. the static removing method of a kind of polyethylene reactor according to claim 1, it is characterized in that, the pulse of anion generator utilization inside in described step 3, vibration electrical equipment rise to negative direct current high voltage by low-voltage, utilize the most advanced and sophisticated high direct voltage of spray point of sparking electrode to produce high corona, emit a large amount of electronics; The electronics of emitting is repelled by the spray point with negative high voltage, spread, and the electrostatic charge that is positive polarity is subject to the attraction with the spray point of negative high voltage, and is neutralized rapidly in polyethylene generator.
4. the static removing method of a kind of polyethylene reactor according to claim 1, it is characterized in that, the pulse of cation generator utilization inside in described step 4, vibration electrical equipment rise to direct current positive high voltage by low-voltage, utilize the most advanced and sophisticated high direct voltage of spray point of sparking electrode to produce high corona, emit a large amount of cations; The cation of emitting is repelled by the spray point with positive high voltage, in polyethylene generator, spreads, and the electrostatic charge that is negative polarity is subject to the attraction with the spray point of positive high voltage, and is neutralized rapidly.
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| CN201410319108.7A CN104159385B (en) | 2014-07-04 | 2014-07-04 | A kind of static elimination method of polyethylene reactor |
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| CN201410319108.7A CN104159385B (en) | 2014-07-04 | 2014-07-04 | A kind of static elimination method of polyethylene reactor |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104483770A (en) * | 2015-01-05 | 2015-04-01 | 合肥京东方光电科技有限公司 | Anti-static device and panel display manufacturing equipment |
| CN105451424A (en) * | 2015-12-30 | 2016-03-30 | 上海安平静电科技有限公司 | Ion fan or ion bar with electrostatic detection and feedback functions |
| 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 |
| 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 |
| 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 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104483770A (en) * | 2015-01-05 | 2015-04-01 | 合肥京东方光电科技有限公司 | Anti-static device and panel display manufacturing equipment |
| CN105451424A (en) * | 2015-12-30 | 2016-03-30 | 上海安平静电科技有限公司 | Ion fan or ion bar with electrostatic detection and feedback functions |
| 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 |
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| CN104159385B (en) | 2016-07-27 |
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Address after: Yanan City, Shandong province Qingdao City three road 266071 No. 218 Applicant after: Sinopec Corp. Applicant after: Qingdao Safety Engineering Research Institute of Sinopec Co., Ltd. Address before: 100728 Chaoyangmen street, Beijing, No. 22, No. Applicant before: Sinopec Corp. Applicant before: Qingdao Safety Engineering Research Institute of Sinopec Co., Ltd. |
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