CN110018366B - Powder electrostatic hazard simulation and prevention and control method for petrochemical device - Google Patents
Powder electrostatic hazard simulation and prevention and control method for petrochemical device Download PDFInfo
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- CN110018366B CN110018366B CN201810019262.0A CN201810019262A CN110018366B CN 110018366 B CN110018366 B CN 110018366B CN 201810019262 A CN201810019262 A CN 201810019262A CN 110018366 B CN110018366 B CN 110018366B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65G—TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS
- B65G53/00—Conveying materials in bulk through troughs, pipes or tubes by floating the materials or by flow of gas, liquid or foam
- B65G53/34—Details
- B65G53/66—Use of indicator or control devices, e.g. for controlling gas pressure, for controlling proportions of material and gas, for indicating or preventing jamming of material
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/24—Arrangements for measuring quantities of charge
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09B—EDUCATIONAL OR DEMONSTRATION APPLIANCES; APPLIANCES FOR TEACHING, OR COMMUNICATING WITH, THE BLIND, DEAF OR MUTE; MODELS; PLANETARIA; GLOBES; MAPS; DIAGRAMS
- G09B25/00—Models for purposes not provided for in G09B23/00, e.g. full-sized devices for demonstration purposes
- G09B25/02—Models for purposes not provided for in G09B23/00, e.g. full-sized devices for demonstration purposes of industrial processes; of machinery
Abstract
The invention relates to a method for simulating and preventing and controlling electrostatic hazard of powder of a petrochemical device, which mainly solves the problem of poor safety caused by poor electrostatic risk simulation and prevention and control effects in the prior art. According to the powder static hazard simulation and prevention and control method for the petrochemical device, the powder static hazard simulation and prevention and control are carried out by adopting the pneumatic conveying powder static hazard simulation device for the petrochemical device, the device comprises basic equipment for electrostatic electrification of the pneumatic conveying powder, a powder static elimination system, a powder static monitoring system, an experimental bin, a cache bin, a bin flushing system and a PLC control system, the problems are well solved, and the powder static hazard simulation and prevention and control method can be used for powder static hazard simulation and prevention and control research of the petrochemical device.
Description
Technical Field
The invention relates to a method for simulating, preventing and controlling electrostatic hazard of powder of a petrochemical device.
Background
The polyolefin/polyester production device can cause the explosion of a storage bin, the agglomeration of materials, the wall sticking of the materials and the like to influence the stable operation of the device due to the electrostatic discharge induced by the electrification of the air-conveying powder. In addition, during the powder packaging process, the powder enters the packaging bag from the feed opening at the bottom end of the stock bin, so that the electrostatic potential on the surface of the packaging bag can reach 100kV sometimes, and not only the electrostatic dust collection pollutes the original powder, but also the electrostatic shock accidents of packaging personnel are even caused.
At present, part of enterprises develop treatment and modification work of part of stock bin static elimination for controlling static, for example, the polyolefin stock bin static eliminator described in patent CN201420422720.2 is used for controlling the electrostatic charge quantity of powder before entering the stock bin. However, the high-energy discharge type in the limited space is influenced by the spatial layout, and after the insulating powder enters the storage bin, the insulating powder is still charged due to the fragmentation of powder, powder and bin wall and powder particles to form charged powder cloud, which may still cause electrostatic discharge inside the storage bin. Therefore, considering the particularity of the petrochemical silo production device, a full-size material pneumatic conveying system must be designed, and the electrification of pneumatic conveying materials, the discharge characteristics of materials in the silo and the electrostatic electrification characteristics of materials in the packaging process are simulated and researched so as to evaluate the electrostatic discharge risk of powder.
The invention aims to provide a typical petrochemical device powder static hazard simulation platform and a static hazard prevention and control research method, which simulate a full-size air-conveying powder process, are used for developing powder static hazard prevention and control technical research, can also be used for simulation demonstration of petrochemical powder static electrification and safety technical training work, and can better serve enterprise safety production.
Disclosure of Invention
The invention aims to solve the technical problem of poor safety caused by poor static risk simulation and prevention and control effects in the prior art, and provides a novel method for simulating and preventing and controlling powder static hazards of a petrochemical device, which has the advantage of good safety.
In order to solve the problems, the technical scheme adopted by the invention is as follows: a powder static hazard simulation and prevention and control method for a petrochemical device is characterized in that a pneumatic conveying powder static hazard simulation device of the petrochemical device is adopted for powder static hazard simulation and prevention and control, the device comprises a basic device for electrostatic electrification of pneumatic conveying powder, a powder static elimination system, a powder static monitoring system, an experimental bin, a cache bin, a bin flushing system and a control system, the basic device for electrostatic electrification of the pneumatic conveying powder comprises an air source and an air conveying pipeline system, the air source and the air conveying pipeline system are connected through a valve, the air source comprises a Roots blower, a cooler, a water separator and a drying filter, the pneumatic conveying pipeline is divided into two pipelines, and the two pipelines are switched through the valve; the powder static eliminating system and the powder static monitoring system are sequentially arranged on an air conveying pipeline at the front end of a feed inlet of the experimental bin; the cache bin comprises a bag filter, a bin and a powder packaging system; the PLC control system is connected with the powder static electricity eliminating system and the powder static electricity monitoring system; the device is adopted to carry out the simulation, prevention and control research of the electrostatic hazard of the powder, and the concrete steps comprise:
the method comprises the following steps: starting an air source and a valve in the basic equipment for electrostatically electrifying the air-conveying powder, feeding the powder in the storage bin into a conveying pipeline through a rotary feeder, purifying and drying compressed air generated by a Roots blower, and then conveying the powder into an experimental storage bin;
step two: an air-assisted powder static elimination device and a static monitoring device are reserved at a material inlet end of an experimental bin, materials pass through the static elimination device and the static monitoring device before entering the experimental bin, the static monitoring device is arranged at the bin inlet, static generated in the material conveying process is monitored on line, and powder static is eliminated through the static elimination device by utilizing an ion air static elimination technology;
step three: the electrostatic charge quantity of powder entering an experimental bin is adjusted, the electrostatic discharge phenomenon in the experimental bin is checked, the material is collected through a sampling hole, the material charge quantity is further tested by utilizing a Faraday cylinder, the detection effect of electrostatic monitoring equipment is compared and calibrated, and experimental basic data are provided for the development of powder electrostatic monitoring and elimination technology and equipment;
step four: after the first step, the third step is completed, the material in the experimental bin is delivered to the cache bin from the experimental bin by air through switching valves on the air path and the conveying pipeline, and the tail gas is filtered by a bag filter arranged at the top end of the cache bin and then discharged;
step five: bagging and packaging the materials in the buffer storage bin, arranging corresponding packaging operation static elimination equipment at a packaging position, and performing performance optimization test on the packaging static elimination equipment to control powder packaging static;
step six: after the experiment is finished or before the material grade is switched, the stock bin is cleaned regularly through a stock bin flushing sprayer and a flushing water pump which are arranged at the front end of the experimental stock bin, and the dusty water after the stock bin flushing is discharged to a sewage disposal pool for centralized treatment through a pipeline.
Preferably, the air supply pipeline is DN100 pipeline, and the pipeline, the pipeline-bin, the pipeline and other equipment are connected through flanges or valves.
Preferably, the gas source comprises a Roots blower, a cooler, a water separator and a drying filter, corresponding parts are connected through pipelines, the Roots blower provides compressed air and ensures that the maximum gas velocity of the pipelines is not less than 35m/s, and the wind-driven electric quantity is more than 1 μ C/kg when the platform runs.
Preferably, the experiment feed bin comprises 2 feed bins, the diameter of each feed bin is larger than 3m, experiment powder in each feed bin can be independently controlled to be added into the conveying pipeline through an independent rotary valve, conveyed by compressed air, conveyed by the air conveying pipeline and returned to the original experiment feed bin or two experiment feed bins to transfer or return to the buffer storage feed bin, and the circulating conveying, transferring or packaging operation of the powder is realized.
Preferably, the rotary valve is used for controlling the feeding amount in a variable frequency mode.
Preferably, transparent observation holes are reserved on the top and the side wall of the experimental bin, so that an operator can observe on site, or a high-speed imaging system is utilized to directly check the electrostatic discharge phenomenon in the experimental bin through an observation window.
Preferably, experiment feed bin top is passed through the pipeline and is connected with the bag filter on buffer memory feed bin top, and through switching the valve on gas circuit and the pipeline during the experiment, the compressed air who is provided by the roots's fan gets into the experiment feed bin through the desicator, can dry the material in the feed bin, and tail gas is emptied after the bag filter filters.
Preferably, the powder static elimination system and the powder static monitoring system can be sequentially installed on an air conveying pipeline at the front end of a feed inlet of an experimental bin, and corresponding equipment can be detached to reserve relevant ports for serving as novel static elimination and monitoring equipment performance testing ports.
Preferably, set up the sample connection respectively on experiment feed bin and the pipeline of static monitoring system low reaches, experiment feed bin top, be convenient for to material sample analysis, detect the static elimination effect.
Preferably, after the experiment is finished or other materials need to be replaced, the materials can be conveyed to the cache bin by switching the manual ball valves on the conveying pipelines, the high-material-level alarm conveying is stopped, then the materials are manually packaged, and the empty bin is continuously conveyed; and arranging corresponding packaging operation static elimination equipment at the packaging position for optimizing and testing the performance of the packaging static elimination equipment.
Preferably, the powder static electricity monitoring and eliminating system is controlled by a PLC (programmable logic controller) system, and the operation parameters of the air conveying system can be manually adjusted.
Preferably, a bin flushing sprayer and a flushing water pump are arranged in the experimental bin, so that the bin can be conveniently cleaned during switching of material grades or at regular intervals, and dust-containing water after the bin flushing is discharged to a sewage disposal pool through a metal hose for centralized treatment.
The invention provides a simulation and prevention and control research method for powder static hazard of a typical petrochemical device, which is used for simulating a pneumatic conveying material conveying process in a full-scale mode and a simulated electrostatic electrification system for the pneumatic conveying powder material of the typical petrochemical device.
Drawings
FIG. 1 is a schematic flow chart of a typical petrochemical plant electrostatic powder hazard simulation system according to the present invention.
FIG. 2 is a schematic diagram of experimental silo design.
In FIGS. 1-2, 1 is a gas source; 1-1 is a Roots blower; 1-2 is a cooler; 1-3 is a water separator; 2, experimental bins (2-1/2-2 are two bins, N1 is a feed inlet, N2 is a discharge outlet, N3 is a dryer outlet, N4 is an exhaust outlet, N5 is a sampling port, N6 is a flushing borrow port, N7 is a manhole well, N8 is a blast port, K1 is a continuous level gauge port, K2 is a high level gauge port, K3 is a low level gauge port, S1 is a bin top observation window/sampling port, and S2 is a bin side wall observation window); 3 is a rotary valve; 4 is a ball valve; 5-1 is a stainless steel pipeline; 5-2 is a glass fiber reinforced plastic pipeline; 6, static elimination equipment and a reserved port; 7-static monitoring equipment and a reserved port; 8-1 caching the stock bin; 8-2 is a bag filter; 8-3 is a powder packaging system; 9 is a dryer, 10 is a rinsing water pump, and 11 is a rotary feeder.
The present invention will be further illustrated by the following examples, but is not limited to these examples.
Detailed Description
[ example 1 ]
As shown in fig. 1, a powder static hazard simulation system for a typical petrochemical plant comprises a basic device for wind power generation, a powder static electricity elimination system, a powder static electricity monitoring system, an experimental bin (as shown in fig. 2), a cache bin, a bin flushing system, a PLC control system and the like. The basic device for electrostatic electrification of the pneumatic powder comprises a gas source 1 and a pneumatic pipeline system 5, wherein the gas source is connected with the pneumatic pipeline system through a valve, the gas source comprises a Roots blower 1-1, a cooler 1-2, a water separator 1-3 and a drying filter 9, the Roots blower 1-1 provides compressed air, the gas is cooled by the cooler 1-2, condensed water generated after cooling of the compressed gas is removed by the water separator 1-3, impurities in the blower and the pipeline are removed by the drying filter 9, and powder is conveyed in the pneumatic pipeline and enters an experimental bin 2.
The experimental bin 2 comprises two experimental bins 2-1 and 2-2, the bin diameter is 3m, the experimental powder in the experimental bin 2(2-1 or 2-2) is added into a conveying pipeline through a rotary valve 3(3-1 or 3-2), an air conveying pipeline 5 (a stainless steel metal pipeline 5-1 or an insulated glass steel pipeline 5-2) is selected through a ball valve 4, the experimental powder is conveyed by compressed air and returns to the original experimental bin or is transferred between the two experimental bins through the air conveying pipeline 5, an electrostatic elimination system 6 and a powder electrostatic monitoring system 7 to realize the circulating conveying of the powder.
The top end of the experiment bin is connected with a bag filter 8-2 at the top end of a buffer material 8-1 bin through a pipeline, during experiment, compressed air provided by a Roots blower 1-1 enters the experiment bin through a dryer 9 by switching valves on an air path and a conveying pipeline, so that materials in the bin can be dried, and tail gas is discharged after being filtered by the bag filter 8-2.
After the experiment is finished or other materials need to be replaced, the materials can be conveyed to a cache storage bin 8-1 by switching the conveying pipelines 5-3, the high material level alarm conveying is stopped, then the materials are manually packaged 8-3, and the empty bin is continuously conveyed; and arranging corresponding packaging operation static elimination equipment at the packaging position for optimizing and testing the performance of the packaging static elimination equipment.
The experimental bin 2 is provided with a bin flushing system consisting of a bin flushing sprayer and a flushing water pump 10, so that the bin can be conveniently cleaned during switching material marks or at regular intervals, and the dust-containing water after the bin flushing is discharged to a sewage disposal pool through a metal hose for centralized treatment.
The air supply pipeline is a DN100 pipeline, and the pipelines, the pipeline-bin, the pipeline and other equipment are connected through flanges or valves.
The Roots blower 1-1 in the air source 1 provides compressed air, the maximum air speed of the air supply pipeline can be ensured not to be less than 35m/s,
the rotary valves 3-1 and 3-2 control the feeding amount by frequency conversion.
Transparent observation holes are reserved on the tops and the side walls of the experimental bins 2-1 and 2-2, and the electrostatic discharge phenomenon in the experimental bins can be observed on site by an operator or directly checked through an observation window by utilizing a CCD high-speed imaging system.
The powder static elimination system 6 and the powder static monitoring system 7 can be sequentially arranged on an air conveying pipeline at the front end of a feed inlet of the experimental bin 2, and related ports reserved in corresponding equipment can be detached and used as novel static elimination and monitoring equipment performance testing ports.
The experiment feed bin and the conveying pipeline on the low reaches of static monitoring system go up, experiment feed bin top sets up the sample connection respectively, is convenient for to material sample analysis, detects the static elimination effect.
The connecting cables of all the devices are shielded cables with insulating sheaths, and shielding layers of the shielded cables are grounded to avoid the occurrence of damage; installation, use and maintenance of the equipment should comply with the product specifications and the following relevant standards and specifications:
(1) GB3836.13-2013 explosive environment part 13: repair, overhaul, repair and reconstruction of equipment
(2) GB3836.15-2000 part 15 of an electrical apparatus for explosive gas environments: electric installation of dangerous place (except for coal mine)
(3) Part 16 of an electrical apparatus for an explosive gas atmosphere of GB 3836.16-2006: inspection and maintenance of electrical devices (except for coal mines)
(4) GB50257-2014 electrical device installation engineering explosion and fire hazard environment electrical device construction and acceptance criteria.
The installation position of the pipeline flange is prevented from gas and powder leakage.
[ example 2 ]
On the basis of the embodiment, the invention provides a typical petrochemical device powder static hazard simulation and prevention and control research method, which is used for qualitatively and quantitatively researching static electrostatic influence factors of air-conveying materials, development and performance optimization of powder static on-line monitoring and elimination equipment, influence rules of high-energy discharge influence factors of materials in a storage bin on discharge frequency, discharge parts and discharge forms, research and development of material packaging static protection technical equipment, performance optimization test and the like, and is carried out according to the following steps:
step 1: starting an air source 1 and a valve in basic equipment for electrostatically charging powder by air conveying, feeding the powder in a bin into a conveying pipeline through a rotary feeder 11, purifying and drying compressed air generated by a Roots blower 1-1, and then conveying the powder into an experimental bin 2-1 or 2-2 by air conveying, wherein the air conveying pipeline selects a stainless steel pipe 5-1 or a non-metal glass steel pipe 5-2 as required (by adjusting the valve) to simulate the electrostatic charging condition of the powder conveyed by pipelines made of different materials;
step 2: the experimental bin 2-1 and the experimental bin 2-2 are provided with the air-conveying powder static electricity eliminating device 6 and the static electricity monitoring device 7 at the material inlet ends, before the materials enter the experimental bin 2-1/2-2, the materials pass through the static electricity eliminating device 6 and the static electricity monitoring device 7, the static electricity monitoring device 7 is arranged at the bin inlet, the static electricity generated in the material conveying process is monitored on line, and the static electricity of the powder can be eliminated by the static electricity eliminating device through an ion air static electricity eliminating technology;
and step 3: reasonably adjusting the electrostatic charge quantity of the powder entering the experimental bin 2-1/2-2, directly checking the electrostatic discharge phenomenon inside the experimental bin through an observation window at the top end of the bin manually or by utilizing a CCD high-speed imaging system, collecting the material through a sampling hole, further testing the electrostatic charge quantity of the material by utilizing a Faraday cylinder, and researching the influence rule of parameters such as the size of the bin, the electric quantity of the powder in the bin and the like on the electrostatic discharge frequency and the discharge form inside the bin;
and 4, step 4: according to the step 3, the Faraday cylinder is used for sending the charge quantity of the tested material through the sampling port at the top of the storage bin, so that the detection effect of the static monitoring equipment is compared and calibrated, and experimental basic data are provided for the powder static monitoring and eliminating technology and equipment development;
and 5: after the step 1-4 is completed, the material in the experimental bin is delivered to a cache bin 8-1 through air of the experimental bin 2-1/2-2 by switching valves on an air path and a conveying pipeline, and tail gas is filtered by a bag filter 8-2 arranged at the top end of the cache bin and then discharged;
step 6: and manually bagging and packaging the materials in the cache bin 8-1, and arranging corresponding packaging operation static elimination equipment at a packaging position 8-3 for performing performance optimization test on the packaging static elimination equipment so as to control powder packaging static.
And 7: before the material trade mark is switched after the experiment is finished, the stock bin is cleaned regularly through a stock bin flushing sprayer and a flushing water pump 10 arranged at the front end of the experimental stock bin, and the dust-containing water after the stock bin is flushed is discharged to a sewage disposal pool through a metal hose for centralized treatment.
It is to be understood that the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art should also make changes, modifications, additions or substitutions within the spirit and scope of the present invention.
[ COMPARATIVE EXAMPLE ]
The invention provides a method for researching the electrostatic hazard of powder of a petrochemical device by using a full-size pneumatic conveying material simulation system, and compared with a solid particle pneumatic conveying system (CN206278687U) and the like, the simulation result of the invention can reflect the actual working condition of a petrochemical storage bin device. For the powder static monitoring and eliminating device which can not be tested on the site of a petrochemical device, the patent can provide a verification platform for the safety and the practicability of a polypropylene powder packaging static eliminating facility (CN 104129539A), a safe powder static eliminator (CN 107306471A), a powder static eliminating device (pipeline type) (CN 303683721S) and the like.
The invention provides a simulation and prevention and control research method for powder static hazard of a typical petrochemical device, which is used for simulating a pneumatic conveying material conveying process in a full-scale mode and a simulated electrostatic electrification system for the pneumatic conveying powder material of the typical petrochemical device.
Claims (10)
1. A powder static hazard simulation and prevention and control method for a petrochemical device is characterized in that a pneumatic conveying powder static hazard simulation device of the petrochemical device is adopted for powder static hazard simulation and prevention and control, the device comprises a basic device for electrostatic electrification of pneumatic conveying powder, a powder static elimination system, a powder static monitoring system, an experimental bin, a cache bin, a bin flushing system and a PLC control system, the basic device for electrostatic electrification of the pneumatic conveying powder comprises a gas source and a pneumatic conveying pipeline system, the gas source and the pneumatic conveying pipeline system are connected through a valve, the gas source comprises a Roots blower, a cooler, a water separator and a drying filter, the pneumatic conveying pipeline is divided into two pipelines, and the two pipelines are switched through the valve; the powder static eliminating system and the powder static monitoring system are sequentially arranged on an air conveying pipeline at the front end of a feed inlet of the experimental bin; the cache bin comprises a bag filter, a bin and a powder packaging system; the PLC control system is connected with the powder static electricity eliminating system and the powder static electricity monitoring system; the device is adopted to carry out the simulation, prevention and control research of the electrostatic hazard of the powder, and the concrete steps comprise:
the method comprises the following steps: starting an air source and a valve in the basic equipment for electrostatically electrifying the air-conveying powder, feeding the powder in the storage bin into a conveying pipeline through a rotary feeder, purifying and drying compressed air generated by a Roots blower, and then conveying the powder into an experimental storage bin;
step two: an air-assisted powder static elimination device and a static monitoring device are reserved at a material inlet end of an experimental bin, materials pass through the static elimination device and the static monitoring device before entering the experimental bin, the static monitoring device is arranged at the bin inlet, static generated in the material conveying process is monitored on line, and powder static is eliminated through the static elimination device by utilizing an ion air static elimination technology;
step three: the electrostatic charge quantity of powder entering an experimental bin is adjusted, the electrostatic discharge phenomenon in the experimental bin is checked, the material is collected through a sampling hole, the material charge quantity is further tested by utilizing a Faraday cylinder, the detection effect of electrostatic monitoring equipment is compared and calibrated, and experimental basic data are provided for the development of powder electrostatic monitoring and elimination technology and equipment;
step four: after the first step, the third step is completed, the material in the experimental bin is delivered to the cache bin from the experimental bin by air through switching valves on the air path and the conveying pipeline, and the tail gas is filtered by a bag filter arranged at the top end of the cache bin and then discharged;
step five: bagging and packaging the materials in the buffer storage bin, arranging corresponding packaging operation static elimination equipment at a packaging position, and performing performance optimization test on the packaging static elimination equipment to control powder packaging static;
step six: after the experiment is finished or before the material grade is switched, the stock bin is cleaned regularly through a stock bin flushing sprayer and a flushing water pump which are arranged at the front end of the experimental stock bin, and the dusty water after the stock bin flushing is discharged to a sewage disposal pool for centralized treatment through a pipeline.
2. The method for simulating, preventing and controlling electrostatic hazard of powder of a petrochemical device according to claim 1, wherein the air supply pipeline is divided into two pipelines, one pipeline is made of stainless steel, the other pipeline is made of metal glass fiber reinforced plastic, and the two pipelines are switched by a valve; the pipelines, the pipeline-material bin and the pipeline are connected with other equipment through flanges or valves.
3. The method for simulating, preventing and controlling electrostatic hazard of powder in a petrochemical device as claimed in claim 1, wherein a roots blower supplies compressed air, the maximum air velocity of the pipeline is not less than 35m/s, the air-assisted electric quantity is greater than 1 μ C/kg when the platform operates, the air is cooled by a cooler, condensed water generated by cooling the compressed air is removed by a water separator, impurities in the blower and the pipeline are removed by a drying filter, and powder is conveyed in the air-assisted pipeline and enters an experimental bin.
4. The method for simulating, preventing and controlling electrostatic hazard of powder in a petrochemical device according to claim 1, wherein the experimental bins comprise 2 bins, the diameter of each bin is larger than 3m, experimental powder in each bin can be independently controlled to be added into a conveying pipeline through an independent rotary valve, conveyed by compressed air, conveyed by an air conveying pipeline and returned to an original experimental bin or two experimental bins for transferring or returned to a cache bin, so that the circulating conveying, transferring or packaging operation of the powder is realized; the rotary valve controls the feeding amount in a frequency conversion mode.
5. The method for simulating, preventing and controlling electrostatic hazard of powder of a petrochemical device according to claim 1, wherein transparent observation holes are reserved on the top and the side wall of the experimental bin, and operators can observe the observation on site or directly check the electrostatic discharge phenomenon in the experimental bin through an observation window by using a CCD high-speed imaging system.
6. The method for simulating, preventing and controlling electrostatic hazard of powder of a petrochemical device as claimed in claim 1, wherein the top end of the experimental bin is connected with a bag filter at the top end of the cache bin through a pipeline, during the experiment, compressed air provided by the roots blower enters the experimental bin through a dryer by switching valves on an air passage and a conveying pipeline, the materials in the bin are dried, and the tail gas is discharged after being filtered by the bag filter.
7. The method for simulating, preventing and controlling electrostatic powder hazard of a petrochemical device according to claim 1, wherein the electrostatic powder elimination system and the electrostatic powder monitoring system are sequentially installed on an air supply pipeline at the front end of a feed inlet of an experimental silo, or relevant ports reserved in corresponding equipment are removed to serve as novel electrostatic elimination and monitoring equipment performance test ports; the powder static monitoring and eliminating system is controlled by a PLC system.
8. The method for simulating, preventing and controlling electrostatic hazard of powder of a petrochemical device according to claim 1, wherein sampling ports are respectively arranged on the conveying pipeline at the downstream of the experimental bin and the electrostatic monitoring system and at the top end of the experimental bin.
9. The method for simulating, preventing and controlling electrostatic hazard of powder of a petrochemical device according to claim 1, wherein after the experiment is finished or when other materials need to be replaced, the materials are conveyed to a cache bin by switching a manual ball valve on a conveying pipeline, the high material level alarming conveying is stopped, then the materials are manually packaged, and the empty bin is continuously conveyed; and arranging corresponding packaging operation static elimination equipment at the packaging position for optimizing and testing the performance of the packaging static elimination equipment.
10. The method for simulating, preventing and controlling electrostatic damage to powder of a petrochemical device according to claim 1, wherein a bin flushing nozzle and a flushing water pump are disposed in an experimental bin to facilitate switching of material grades or cleaning of the bin at regular intervals, and dust-containing water flushed from the bin is discharged to a sewage disposal pool through a metal hose for centralized treatment.
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| CN201810019262.0A CN110018366B (en) | 2018-01-09 | 2018-01-09 | Powder electrostatic hazard simulation and prevention and control method for petrochemical device |
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| CN201810019262.0A CN110018366B (en) | 2018-01-09 | 2018-01-09 | Powder electrostatic hazard simulation and prevention and control method for petrochemical device |
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| CN110018366B true CN110018366B (en) | 2021-08-03 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1303428C (en) * | 2003-05-10 | 2007-03-07 | 江苏东强股份有限公司 | Powder electrostatic monitor |
| DE102007045330A1 (en) * | 2007-09-22 | 2009-04-02 | Itw Gema Gmbh | Coating powder conveying method, coating powder conveying device and electrostatic powder spray coating device |
| US8544410B2 (en) * | 2007-11-07 | 2013-10-01 | Akihiko Tanioka | Immobilization apparatus |
| CN201309711Y (en) * | 2008-11-07 | 2009-09-16 | 中国石油天然气集团公司 | Powdery material electrostatic elimination device of fully-automatic hopper |
| CN104129539A (en) * | 2014-07-04 | 2014-11-05 | 中国石油化工股份有限公司 | Polypropylene powder package static eliminating facility |
| CN203968481U (en) * | 2014-07-30 | 2014-11-26 | 大庆安惟特科技有限公司 | Polyolefin bunker Xelminator |
| CN107306471A (en) * | 2015-12-25 | 2017-10-31 | 北京东方计量测试研究所 | A kind of safety-type powder electrostatic arrester |
| CN206278687U (en) * | 2016-10-19 | 2017-06-27 | 山东鲁岳化工有限公司 | Solid particle blast system |
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