CN207007948U - A kind of wind send powder electrostatic on-line monitoring with eliminating control system - Google Patents
A kind of wind send powder electrostatic on-line monitoring with eliminating control system Download PDFInfo
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- CN207007948U CN207007948U CN201720752883.0U CN201720752883U CN207007948U CN 207007948 U CN207007948 U CN 207007948U CN 201720752883 U CN201720752883 U CN 201720752883U CN 207007948 U CN207007948 U CN 207007948U
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- consumer appliance
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Abstract
The utility model belongs to the field of measuring technique of quantities of charge, disclosing a kind of wind send powder electrostatic to monitor on-line with eliminating control system, including emptying ball valve, charging aperture pipeline, the bar ball sensor in charging aperture pipeline, ion wind consumer appliance, the consumer appliance switch board for controlling ion wind consumer appliance, the supply air system for ion wind consumer appliance air feed, the PLC long-distance control cabinets for controlling supply air system, consumer appliance switch board, bar ball sensor and emptying ball valve.The utility model effectively realizes long-range, the real time and on line monitoring to powder electrostatic during polyolefin powder conveying, effectively controls electrostatic potential in feed bin, prevents static discharge, facilitates operating personnel, ensures polyolefin powder storage transport and handling operation safety.
Description
Technical field
The invention belongs to the field of measuring technique of quantities of charge, and in particular to a kind of wind send powder electrostatic on-line monitoring with disappearing
Except control system.
Background technology
Polyolefine material is often referred to the polymer of ethene, propylene or higher alkene, and excellent performance is cheap, extensive
Various aspects applied to national economy such as electronic apparatus, packaging, agricultural, automobile, communication and buildings.Polyolefine material produced
Cheng Zhong, the flammable powder-granule material of height insulation is sent through wind transport, crush, sieving, being sirred and separated etc. during produce electrostatic accumulation, can
Make storage powder, the feed bin inner powder bulk potential of particulate material can be in more than 40kV, its electrostatic fires research of always taking precautions against natural calamities both at home and abroad
The difficult point of concern.To ensure that feed bin is safe for operation, domestic and foreign scholars unanimously think the powder charge-mass ratio that should will enter feed bin（Unit
The carried charge of quality material）Control is in 0.3-0.4 μ C/m3Below.When charge-mass ratio over-limit condition, the table of each powder particle
Face electric-field intensity is enough the atmospheric ionization for making surrounding, powder electrostatic will be caused to discharge.Therefore, the measurement of charge-mass ratio is for prevention
Static discharge accident is significant.
Feed bin powder electrostatic carried charge detection at present is mainly completed by Faraday cage principle manual hand manipulation, it is difficult to
Accomplish the real-time monitoring to required powder electrostatic in polyolefin production processes.Patent CN203965528U discloses a kind of polyene
Hydrocarbon feed bin electrostatic monitor, its principle are to secure Faraday cup in the short circuit on pumped (conveying) medium tube shell, pass through faraday
Cylinder test material charge-mass ratio, while prevent Faraday cup from blocking air delivery pipe, but the powder electrostatic monitoring device needs manually
Operation, it is difficult to realize monitoring in real time.Patent CN1548966A discloses a kind of electrostatic power monitor, and its operation principle is in pipe
Dumpable constant volume electric charge room is set in road, detects material carried charge in electric charge room, is substantially still surveyed using Faraday cage principle
Try material charge-mass ratio.
The technical program, which solves current polyolefin production processes, to ask what the electrostatic of wind powder feeding body was monitored in real time
Topic, realize powder electrostatic on-line monitoring and eliminate.The powder electrostatic amount ensured into feed bin is controlled below safety value in real time, is protected
Fire electric discharge phenomena will not be fired because powder electrostatic largely gathers inside card feed bin, ensure manufacture of polyolefins job safety.
The content of the invention
To solve the problems, such as that polyolefin production processes apoplexy send powder electrostatic can not monitor in real time with eliminating, there is provided Yi Zhongfeng
Powder electrostatic on-line monitoring is sent to deliver to powder/particle electrification band of material outlet with eliminating control system, real-time Detection ＆ Controling wind
Electricity, prevent from producing the high energy electrostatic electric discharge of combustion fire because charged powder gathers inside feed bin, ensure that feed bin is safe, use is following
Technical scheme is achieved：
A kind of wind send powder electrostatic on-line monitoring and eliminates control system, including emptying ball valve, charging aperture pipeline, is arranged on
The consumer appliance switch board of bar ball sensor, ion wind consumer appliance, control ion wind consumer appliance in charging aperture pipeline, it is ion wind
The supply air system of consumer appliance air feed, control the PLC of supply air system, consumer appliance switch board, bar ball sensor and emptying ball valve long-range
Switch board.PLC tele-control systems control wind powder feeding body electrostatic belt electricity real-time monitoring system and wind powder feeding body static elimination system
System normal work, records Monitoring Data.
Bar ball sensor has two, is the first bar ball sensor close to emptying ball valve, measures powder charge density size,
It is the second bar ball sensor away from emptying ball valve, detects powder electrostatic eradicating efficacy.
The real-time monitoring of wind powder feeding body electrostatic ribbon amount is to use bar ball sensor, is changed by induction pipe internal electric field and examined
Measuring tape electricity material electrostatic entrained before feed bin is entered, two bar ball sensors（Powder electrostatic lotus sensor, including sensing
Device body and spy stylus ball）Sent by flange installed in the vertical wind in feed bin charging aperture front end on material pipe；Wind send powder electrostatic
Elimination be to utilize charging neutrality principle, by electrode needle apply high voltage, ionize air molecule, will just by supply air system
Anion is blown into pulverized coal feed pipe, realizes the elimination to powder electrostatic lotus.
Ion wind consumer appliance includes consumer appliance body, air outlet, ion wind consumer appliance power supply, flowmeter, pressure gauge and electricity
Magnet valve.
Charging aperture pipeline also includes mounting flange.
Before powder conveying operation starts, PLC tele-control systems instruct supply air system to be blown to ion wind consumer appliance, electromagnetism
Valve and pressure gauge send enabling signal and real-time wind pressure value to consumer appliance switch board, when wind pressure value reaches more than setting value, disappear
Electric control cabinet starts ion wind consumer appliance power supply, while transmits a signal to PLC long-distance control cabinets, the instruction of PLC long-distance control cabinets
Bar ball sensor is opened, and starts emptying ball valve, and material starts Geldart-D particle.
The powder charge density size measured according to the first bar ball sensor, consumer appliance switch board adjustment ion wind consumer appliance
The voltage or polarity of voltage of power supply, the second bar ball sensor monitoring powder electrostatic eradicating efficacy, feedback signal to consumer appliance control
Cabinet, according to feedback signal, consumer appliance switch board calibration power supply output high pressure, optimal electric eliminating effect is realized, controls powder electric charge close
Degree is all the time in the range of safety value.
With reference to wind powder feeding body electrostatic belt electricity real-time monitoring system, powder electrostatic monitoring and interlock control system are established, it is real
Show electrostatic monitoring system and electrostatic elimination system reponse system each other, utilize the malleation ion among two bar ball sensors
Wind consumer appliance eliminates powder electrostatic, and automatically adjusts the distinguished and admirable size and polarity of ion according to electrostatic monitoring feedback data, ensures
Job safety.Capital equipment includes：Consumer appliance：Including consumer appliance body, mounting flange, pipe laying；Consumer appliance power supply
Device：Ac high voltage source, power control；Powder electrostatic lotus sensor：Sensor body, visit stylus ball, mounting flange, peace
Tubulature road；Wind pressure monitoring system：Gas flow meter, air gauge, magnetic valve；PLC long-distance control cabinets.
Powder electrostatic monitoring system perceives the vertical pipeline internal electric field change of material outlet front end, during accurately detection wind is sent
The carried charge of powder granule, when body of powder electrification amount is larger, by applying high pressure to the electrode needle of powder arrester, make air point
Negative ions, are blown into powder conveying pipeline by son ionization by blast system, are realized detection in real time, are controlled and delivered to eliminating wind
The powder of material outlet/particle electrification carried charge, prevents body of powder electrification amount from increasing situation extremely, prevents inside feed bin because powered
Powder gathers and produces the high energy electrostatic electric discharge of combustion fire, ensures feed bin safety.
The technical program effectively realizes long-range, the real time and on line monitoring to powder electrostatic during polyolefin powder conveying,
Electrostatic potential effectively in control feed bin, prevents static discharge, facilitates operating personnel, ensures polyolefin powder storage transport and handling
Job safety.
Brief description of the drawings
Fig. 1：A kind of wind of the present invention send powder electrostatic on-line monitoring with eliminating control system architecture schematic diagram.
Wherein, 1. emptying ball valve；2. pipe laying；3. mounting flange；4-1. the first bar ball sensors；4-2. the second bar balls
Sensor；5. ion wind consumer appliance；5-1. consumer appliance bodies；5-2. air outlet；5-3. ion wind consumer appliance power supplys；5-4. flow
Table；5-5. pressure gauge；5-6. magnetic valve；6.PLC long-distance control cabinets；7. consumer appliance switch board；8. supply air system.
Embodiment
Technical scheme is described in further detail with reference to the accompanying drawings and detailed description.
A kind of wind send powder electrostatic on-line monitoring and eliminates control system, including emptying ball valve, charging aperture pipeline, is arranged on
The consumer appliance switch board of bar ball sensor, ion wind consumer appliance, control ion wind consumer appliance in charging aperture pipeline, it is ion wind
The supply air system of consumer appliance air feed, control the PLC of supply air system, consumer appliance switch board, bar ball sensor and emptying ball valve long-range
Switch board.
Bar ball sensor has two, and what it is close to emptying ball valve is the first bar ball sensor, is second away from emptying ball valve
Bar ball sensor.
Ion wind consumer appliance includes consumer appliance body, air outlet, ion wind consumer appliance power supply, flowmeter, pressure gauge and electricity
Magnet valve.
Charging aperture pipeline also includes mounting flange.
Before powder conveying operation starts, PLC tele-control systems instruct supply air system to be blown to ion wind consumer appliance, electromagnetism
Valve and pressure gauge send enabling signal and real-time wind pressure value to consumer appliance switch board, when wind pressure value reaches more than setting value, disappear
Electric control cabinet starts ion wind consumer appliance power supply, while transmits a signal to PLC long-distance control cabinets, the instruction of PLC long-distance control cabinets
Bar ball sensor is opened, and starts emptying ball valve, and material starts Geldart-D particle.
The powder charge density size measured according to the first bar ball sensor, consumer appliance switch board adjustment ion wind consumer appliance
The voltage or polarity of voltage of power supply, the second bar ball sensor monitoring powder electrostatic eradicating efficacy, feedback signal to consumer appliance control
Cabinet, according to feedback signal, consumer appliance switch board calibration power supply output high pressure, control powder charge density.
As shown in figure 1, the first bar ball sensor 4-1, the second bar ball sensor 4-2 and ion wind of the technical program are eliminated
Device 5 is sent on material pipe 2 by flange 3 installed in the vertical wind in feed bin charging aperture front end.Electricity inside bar ball sensor induction pipe
Field change detects powered material electrostatic entrained before feed bin is entered, and its detection is based on following design principle：
Assuming that endless tube bundle is full of charged powder, powder charge density is ρ, and can obtain pipeline according to Gauss theorem breaks
FacerThe current potential at place is：
(1)
In formula：r 0For pipe radius, m；rFor the distance at any point in pipeline to axle center, m；V r For any point in pipeliner
Locate current potential, V；ε is oil product dielectric constant, F/m.
WhenrWhen=0, according to formula（1）, powder charge density：
(2)
In formulaV 0 It is the current potential of pipeline center's powder.
Bar ball sensor is designed according to principles above, needs to meet：
（1）Bar ball sensor is much smaller compared with pipeline dimension, but bar ball will have certain mechanical strength；（2）Measuring instrument
Table input impedance is sufficiently large, ensures measuring system in itself as far as possible without charge leakage；（3）Charge density approaches uniformity；（4）Bar ball passes
Sensor and its lead must insulate with metallic conduit, while prevent seepage.
Wind powder feeding body electrostatic belt electricity real-time monitoring system 4 is by two bar ball sensors（Powder charge monitoring instrument 4-1 and 4-
2）Pass through the electrostatic elimination system on pipeline for detecting powder on the installation vertically-mounted pipeline 2 in feed bin charging aperture front end
Electrostatic belt electricity size when before and after 5.
Ion wind consumer appliance 5 is by electrode needle（Consumer appliance body 5-1）Apply high voltage, ionize air molecule；Send
Air port 5-2 connects blast system 8 by air quantity flowmeter 5-4, pressure gauge 5-5 and magnetic valve 5-6, and supply air system 8 passes through air-supply
Negative ions are blown into pulverized coal feed pipe by mouth 5-2 malleation blowings, realize the elimination to powder electrostatic lotus, wherein ion wind electric eliminating
Device power supply 5-3 provides operating voltage for consumer appliance body 5-1.
PLC long-distance control cabinets 6 perceive the powder electric charge of the first bar ball sensor 4-1 and the second bar ball sensor 4-2 detections
Signal, control and regulation consumer appliance switch board 7 and the signal of blast system 8.
Ion wind consumer appliance power supply 5-3 uses AC power or pulse ac Power Management Design.According to the first bar ball sensor
4-1 surveys powder charge density size, and consumer appliance switch board 7 adjusts the height or voltage of ion wind consumer appliance power supply 5-3 voltages
Polarity；Second bar ball sensor 4-2 is used to monitor powder electrostatic eradicating efficacy, and feedback signal is to consumer appliance switch board 7；According to
Feedback signal, 7 further calibration power supply of consumer appliance switch board output high pressure, realizes optimal electric eliminating effect, controls powder electric charge close
Degree is all the time in the range of safety value.
Before powder conveying operation starts, supply air system 8 is instructed to blow by PLC long-distance control cabinets 6, magnetic valve 5-6 and pressure
Power table 5-5 sends enabling signal and real-time wind pressure value to consumer appliance switch board 7；When wind pressure value reaches on setting and keeps
After certain time（Time delay can set）, consumer appliance switch board 7 then starts ion wind consumer appliance power supply 5-3；Meanwhile transmit letter
PLC long-distance control cabinets 6, PLC long-distance control cabinets 6 command bar ball sensor 4-1 and/or 4-2 work number are given, and starts emptying ball valve
1, material starts Geldart-D particle.
The charge value that consumer appliance switch board 7 is fed back according to bar ball sensor 4-1/4-2, offset appliances power source 5-3 regulations
Control, make the control of powder electrostatic charge density in safe range.
Powder electrostatic monitor with elimination control system all devices with the relevant device through explosion-proof accreditation is supporting collectively constitutes,
The hazardous area of explosive powder mixture available for scene be present.System wiring is simultaneously in accordance with the operation instructions of relevant device
It is required that.Pipe flange installation place has prevented gas, powder seepage.
The connecting cable of all devices is the shielded cable of having insulation sheath, shielding layer grounding, prevents to damage phenomenon；
The mounting, commissioning and maintenance of equipment observes product description and following relevant criterion, the requirement of specification simultaneously：GB3836.13-
The part of 2013 explosive atmosphere the 13rd：Repairing, maintenance, reparation and the transformation of equipment；GB3836.15-2000 explosive gas rings
The part of border electrical installation the 15th：Electrically install hazardous area（Except colliery）；GB3836.16-2006 explosive gas atmospheres
The part of electrical installation the 16th：The examination and maintenance of electric device（Except colliery）；GB50257-2014 electric device erectors
Journey is exploded and the construction of fire hazard electric device and acceptance specification.
Embodiment only illustrates technical scheme, rather than carries out any restrictions to it；Although with reference to the foregoing embodiments
The present invention is described in detail, for the person of ordinary skill of the art, still can be to previous embodiment institute
The technical scheme of record is modified, or carries out equivalent substitution to which part technical characteristic；And these modifications or substitutions, and
The essence of appropriate technical solution is not set to depart from the spirit and scope of claimed technical solution of the invention.
Claims (6)
1. a kind of wind send powder electrostatic on-line monitoring with eliminating control system, it is characterised in that：Including emptying ball valve, charging aperture pipe
Road, the bar ball sensor in charging aperture pipeline, ion wind consumer appliance, the consumer appliance control for controlling ion wind consumer appliance
Cabinet, the supply air system for ion wind consumer appliance air feed, control supply air system, consumer appliance switch board, bar ball sensor and blowing ball
The PLC long-distance control cabinets of valve.
2. a kind of wind according to claim 1 send powder electrostatic on-line monitoring with eliminating control system, it is characterised in that：Bar
Ball sensor has two, and what it is close to emptying ball valve is the first bar ball sensor, is the second bar ball sensor away from emptying ball valve.
3. a kind of wind according to claim 1 send powder electrostatic on-line monitoring with eliminating control system, it is characterised in that：From
Sub- wind consumer appliance includes consumer appliance body, air outlet, ion wind consumer appliance power supply, flowmeter, pressure gauge and magnetic valve.
4. powder electrostatic on-line monitoring is sent with eliminating control system, its feature according to a kind of any described wind of claim 1-3
It is：Charging aperture pipeline also includes mounting flange.
5. a kind of wind according to claim 1 send powder electrostatic on-line monitoring with eliminating control system, it is characterised in that：Powder
Before body conveying operation starts, PLC tele-control systems instruct supply air system to be blown to ion wind consumer appliance, magnetic valve and pressure gauge
Enabling signal and real-time wind pressure value are sent to consumer appliance switch board, when wind pressure value reaches more than setting value, consumer appliance switch board
Start ion wind consumer appliance power supply, while transmit a signal to PLC long-distance control cabinets, PLC long-distance control cabinet command bar ball sensors
Open, start emptying ball valve, material starts Geldart-D particle.
6. a kind of wind according to claim 5 send powder electrostatic on-line monitoring with eliminating control system, it is characterised in that：
The powder charge density size measured according to the first bar ball sensor, consumer appliance switch board adjustment ion wind consumer appliance power supply
Voltage or polarity of voltage, the second bar ball sensor monitoring powder electrostatic eradicating efficacy, feedback signal to consumer appliance switch board, root
According to feedback signal, consumer appliance switch board calibration power supply output high pressure, powder charge density is controlled.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720752883.0U CN207007948U (en) | 2017-06-27 | 2017-06-27 | A kind of wind send powder electrostatic on-line monitoring with eliminating control system |
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| CN201720752883.0U CN207007948U (en) | 2017-06-27 | 2017-06-27 | A kind of wind send powder electrostatic on-line monitoring with eliminating control system |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109142900A (en) * | 2017-06-27 | 2019-01-04 | 中国石油化工股份有限公司 | A kind of wind send powder electrostatic on-line monitoring and eliminates control system |
| 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 |
| CN109688683A (en) * | 2018-12-30 | 2019-04-26 | 上海安平静电科技有限公司 | A kind of exchange powder charger-eliminator and powder conveying pipeline charge eliminate system |
| CN110386374A (en) * | 2018-04-19 | 2019-10-29 | 中国石油化工股份有限公司 | For monitoring and controlling the method and system of polyolefin bunker powder electrostatic |
| CN110568278A (en) * | 2018-06-06 | 2019-12-13 | 中国石油化工股份有限公司 | Pipeline powder static on-line monitoring device |
| CN110568274A (en) * | 2018-06-06 | 2019-12-13 | 中国石油化工股份有限公司 | Pipeline powder static monitoring devices |
| CN111537811A (en) * | 2020-04-29 | 2020-08-14 | 中煤科工集团重庆研究院有限公司 | Testing device for testing static electricity on wall surface of dust-containing gas conveying pipeline |
-
2017
- 2017-06-27 CN CN201720752883.0U patent/CN207007948U/en active Active
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109142900A (en) * | 2017-06-27 | 2019-01-04 | 中国石油化工股份有限公司 | A kind of wind send powder electrostatic on-line monitoring and eliminates control system |
| CN110386374A (en) * | 2018-04-19 | 2019-10-29 | 中国石油化工股份有限公司 | For monitoring and controlling the method and system of polyolefin bunker powder electrostatic |
| CN110386374B (en) * | 2018-04-19 | 2021-04-13 | 中国石油化工股份有限公司 | Method and system for monitoring and controlling static electricity of polyolefin bin powder |
| CN110568278A (en) * | 2018-06-06 | 2019-12-13 | 中国石油化工股份有限公司 | Pipeline powder static on-line monitoring device |
| CN110568274A (en) * | 2018-06-06 | 2019-12-13 | 中国石油化工股份有限公司 | Pipeline powder static monitoring devices |
| 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 |
| CN109688683A (en) * | 2018-12-30 | 2019-04-26 | 上海安平静电科技有限公司 | A kind of exchange powder charger-eliminator and powder conveying pipeline charge eliminate system |
| CN111537811A (en) * | 2020-04-29 | 2020-08-14 | 中煤科工集团重庆研究院有限公司 | Testing device for testing static electricity on wall surface of dust-containing gas conveying pipeline |
| CN111537811B (en) * | 2020-04-29 | 2022-07-19 | 中煤科工集团重庆研究院有限公司 | Testing device for testing static electricity on wall surface of dust-containing gas conveying pipeline |
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