CN109187635A - A kind of interior experimental provision and method for measuring large dosage of dust explosive characteristic of open space - Google Patents
A kind of interior experimental provision and method for measuring large dosage of dust explosive characteristic of open space Download PDFInfo
- Publication number
- CN109187635A CN109187635A CN201811236260.3A CN201811236260A CN109187635A CN 109187635 A CN109187635 A CN 109187635A CN 201811236260 A CN201811236260 A CN 201811236260A CN 109187635 A CN109187635 A CN 109187635A
- Authority
- CN
- China
- Prior art keywords
- dust
- spray head
- combined system
- control system
- intelligence control
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/50—Investigating or analyzing materials by the use of thermal means by investigating flash-point; by investigating explosibility
- G01N25/54—Investigating or analyzing materials by the use of thermal means by investigating flash-point; by investigating explosibility by determining explosibility
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Abstract
The present invention relates to experimental provisions and method that large dosage of dust explosive characteristic is measured in a kind of open space, including air distribution system, intelligence control system, spray head combined system, storage powder combined system, equipment supporter, igniting combined system.The air distribution system includes one of air, imflammable gas or inert gas or multiple combinations gas；The intelligence control system includes PLC technology unit and remote control unit, sprays the time with firing delay using the conveying of ventilation component control gas, dust；The spray head combined system includes spray head and spray head pedestal, and annular airflow can be achieved in the thin seam of the two junction；The storage powder combined system includes storage tube, mobile piston and storage tube bottom plug；The igniting combined system includes igniter bracket and adjustable energy high-voltage pulses device.This experimental provision is easy to operate, and experimental method is easy, and experimental phenomena is obvious, and can by high-speed camera observational record large dosage dust spray and burn when propagation characteristic.
Description
Technical field
It is specifically a kind of that large dosage is measured in open space the present invention relates to the field of research dust combustion explosion phenomenon
The experimental provision and method of dust explosive characteristic.
Background technique
Dust explosion refers to the combustible dust for reaching certain explosion ratio limit under specified conditions, (bright touching incendiary source
Fire or electric spark etc.) when the phenomenon that exploding, causing pressure and temperature to increase rapidly, and release amount of heat.Dust
Explosion is most of to be occurred containing metallic dusts such as aluminium powder, magnesium powders, various plastic powders, the organic intermediate of synthetic drug and more
The production and processing such as number Grain plants fiber dust place.
Existing dust combustion explosion testing device is based on closed bomb experiment more, and experimental provision is made of metal material (20L
Spherical inerting apparatus, 1m3Explosive container test device etc.), constant volume, Observable channel is limited, and such device is mainly used for
Dust explosion phenomenon is studied, the parameters such as blast pressure and the rate of pressure rise of all kinds of dust are tested.It burns for dust cloud
In the research of process Flame Propagation phenomenon, China Science & Technology University's SKLFS is also in limited sky
It is interior to ignite dust cloud using high-voltage spark to study dust combustion explosion flame transmission rule in restricted clearance.
And the research for dust combustion explosion phenomenon in open space, (the Combustion and such as Goroshin
Flame, 1996) establish the device for generating Bunsen burner type premix dust flame, (the Aerosol Science such as Shoshin
AndTechnology, 2002) devise the experimental provision for generating metal aerosol, Liang Ge team have studied dust particles and
The experimental phenomena of air gas-solid two-phase mixture premixed combustion.Big equal (the Journal of Loss Prevention in the of height
Process Industries, 2016) describe the experimental provision that test dust fires in a kind of open space has for studying
Machine object dust fires experiment, which includes the push pipe for having open end, and one moveable intermediate
Pipe and a lower tube for being connected to stainless steel base, provide an open space for dust cloud, make flame not by
It is propagated in the environment of tube wall constraint.Patent CN102323374A discloses a kind of open space dust and continuously blows and sprays premixed combustion reality
Check system realizes and obtains a variety of flame profiles and area of flame on same burner, provides further investigation open space
The flame propagation of the continuous gas-solid two-phase flow field of dust cloud and the experiment porch for carrying the burning of grain stream.But above-mentioned experimental system cannot
Guarantee the cloud form system for making dust be dispersed into even concentration in open space, and for the combustible dust quality of test by
To the limitation of device, dust combustion and instability Mechanism, flame propagation mechanism and burned region and unburned area can not accurately be observed
The rule of the combustion reactions such as influence of the unstability at interface to flame acceleration.
For above-mentioned phenomenon, the invention proposes a kind of in open space measures the experiment of large dosage of dust explosive characteristic
Device and method not only provides visualization angle in open space, but also can test large dosage of dust and be uniformly distributed burning
Experimental phenomena.
Summary of the invention
In order to overcome the shortcoming of above-mentioned background technology, the present invention provides one kind for observing big agent in open space
The experimental provision and method that amount dust fires, are shed large dosage of dust using the device, after ignition device, cooperation
High speed video system can observe and record dust and fire phenomenon.Again by matched ancillary equipment, observes and records dust and fired
The basic parameter of journey, flame structure, mechanism of flame propagation etc..
In order to solve the above technical problems, the present invention is implemented with the following technical solutions:
A kind of interior experimental provision for measuring large dosage of dust explosive characteristic of open space, specifically includes air distribution system, intelligence
Control system, spray head combined system, storage powder combined system, equipment supporter, igniting combined system.The air distribution system includes sky
One of gas, imflammable gas or inert gas or multiple combinations gas, and it is furnished with gas pressure reducer；The intelligent control
System includes PLC technology unit and remote control unit；The spray head combined system includes spray head and spray head pedestal；It is described
Storage powder combined system includes storage tube, mobile piston and storage tube bottom plug；The igniting combined system includes height-adjustable
Igniter bracket and adjustable energy high-voltage pulses device.
Above-mentioned air distribution system is connected by high pressure resistant hose with intelligence control system, and intelligence control system is fixed on equipment
Air distribution system and storage powder combined system and spray head combined system are together in series using high pressure resistant hose, are led to by the side of bracket
Cross the control that copper wires are connected with igniting combined system, and realize air inlet by the programming of intelligence control system, dust and light a fire
System.
In above-mentioned apparatus, the air distribution system is connected with PLC technology unit in intelligence control system, is controlled by programming
System realizes the conveying of distribution.
In above-mentioned apparatus, the intelligence control system be connection maincenter, can setting program come realize dust ejection, dispersion
And ignition process.
In above-mentioned apparatus, the spray head combined system is to realize the assembly of the ultra-thin air stream of annular high voltage.
In above-mentioned apparatus, storage tube is Demountable metallic cylinder in the storage powder combined system, to store dust, is moved
Piston pushes dust to spray from spray head under high pressure gas effect, and storage tube bottom plug is equipped with the air inlet for the gas that dusts, and is carved with
Screw thread silk is simultaneously equipped with sealing ring, to form confined space between piston and storage tube bottom plug.
In above-mentioned apparatus, the igniting combined system is supported with special height-adjustable igniting rack, by copper
Electric lead is connected with intelligence control system, while igniter uses adjustable energy high-voltage pulses device, for lighting dust.
A kind of interior experimental method for measuring large dosage of dust explosive characteristic of open space, comprising the following steps:
St1: mobile piston is shifted onto the bottom of storage tube, the dust to be tested of large dosage is put into cylinder；
St2: being programmed setting to intelligence control system, respectively realizes inlet period, dust time and the duration of ignition
Control；
St3: the mixed gas output pressure of air distribution system is adjusted；
St4: remote opening intelligence control system, gradually ventilation component in control piper, is first opened at spray head combined system
Ventilation component, then open the ventilation component at storage tube bottom plug, pushed rapidly using high pressure gas and move piston, and then pushed away
Preset dust is moved quickly to spray from spray head；
St5: by certain delay time after dust whole ejection, intelligence control system controls igniter energization igniting,
Complete the experiment that process is fired to dust；
St6: experimenter operates high speed video system at a distance, records the process of dust ejection and ignition.
Compared with prior art, the invention has the advantages that and the utility model has the advantages that the present apparatus uses intelligence control system, having
Effect is reasonable and can control distribution conveying and ignition delay time as needed, so that dust is uniformly dispersed when spraying.While by
The intelligence control system improves the safety of experiment, it can be achieved that remote operation.It can also be accessed at igniter bracket various
Sensor, using corollary equipment, to obtain various experiment parameters.Dust is ejected outside when experiment, can be direct and clear
It observes and records, convenient for further research.
Detailed description of the invention
Fig. 1 is system structure diagram of the invention, and specific structure is as follows:
1- air distribution system, 2- intelligence control system, 3- spray-nozzle type sprinkler head, 4- pedestal, 5- storage tube, 6- is mobile to live
Plug, 7- storage tube bottom plug, the bracket of 8- powder spraying apparatus, 9- igniter bracket, 10- high-voltage pulses device.
Specific embodiment
Technical solution of the present invention is further described in detail with reference to the accompanying drawings and detailed description.
Embodiment 1:
The experimental provision of large dosage of dust explosive characteristic is measured in a kind of open space as shown in Figure 1, air distribution system 1 be by
One or more of air, imflammable gas and inert gas combine gas system, and are furnished with air reducing valve, can control
The pressure size of gas conveying processed；Intelligence control system 2 is fixedly mounted on the side of powder spraying apparatus bracket 8, it, which is used as, entirely matches
The into and out control axis of gas enters the time sprayed with dust by setting process control distribution；Nozzle 3, spray head bottom
Seat 4 is combined into a complete spray head, circularizes air stream by the reserved thin slit of annular of the two junction；Storage tube 5 is moved
Piston 6 and storage tube bottom plug 7, three form a set of metal cylinder and store up powder combined system, and mobile piston 6 can be in the work of strong gas pressure
It is sprayed with the dust in lower promotion storage tube 5 from spray head；Powder spraying apparatus bracket 8 is welded by high-quality steel pipe and steel plate；Igniting
Appliance stand 9 be by high-quality steel-pipe welding at four angle supports, the vertical height of the adjustable igniter of Arm portion, to change
Ignition location when becoming experiment；Adjustable energy high-voltage pulses device 10 is fixed on igniter bracket 9, passes through copper wires and intelligence
It can control the connection of system 2, and power on/off controlled by intelligence control system 2, realize the igniting to dust.Each part mentioned above component is matched
It is soft using pressure resistance between gas system 1, spray head combined system (3 and 4), storage powder combined system (5,6 and 7) and intelligence control system 2
Pipe (10MPa) is attached, to realize operation of the gas in a whole set of experimental system.It lights a fire combined system (9 and 10) and intelligent
It is attached between control system 2 using copper conductor wire, to ensure to carry out Accurate Points to the dust of dispersion after the completion of dusting
Fire.
Embodiment: 2:
Distribution uses methane air mixed gas in this example, and dust uses coal dust, and igniter uses high-voltage pulse
Igniter.
When being tested, mobile piston 6 is shifted onto the bottom of storage tube 5, the coal dust of large dosage is put into cylinder
(1kg)；Then program setting is carried out to intelligence control system 2, realizes inlet period, the control of dust time and the duration of ignition respectively
System；Then the methane air mixed gas output pressure (2MPa) of air distribution system 1 is adjusted；When air pressure is enough, remote opening intelligence
It can control system 2, make its gradually ventilation component in control piper, the ventilation member being first turned at spray head combined system (3 and 4)
Part, so that and then the thin slit of annular of both nozzle 3 and spray head pedestal 4 junction opens storage tube at high pressure annular airflow
Ventilation component at bottom plug 7 is pushed rapidly mobile piston 6 using high pressure gas, and then pushes the preset coal dust inside storage tube 5
It is quickly sprayed from spray head, under the action of high pressure annular air stream, coal dust is evenly dispersed, diffuses in cloud, and last dust is complete
Portion lights a fire after spraying by certain delay time (60ms), then by the control energization of igniter 10 of intelligence control system 2, completion pair
Coal dust entirely fires the experiment of process；Experimenter operates high speed video system at a distance, directly can observe and record entire coal
Powder sprays and the process of ignition.
Claims (5)
1. measuring the experimental provision and method of large dosage of dust explosive characteristic, including air distribution system, intelligence in a kind of open space
The parts such as control system, spray head combined system, storage powder combined system, equipment supporter, igniting combined system, it is characterised in that intelligence
Control system includes PLC technology unit and remote control unit, is fixedly mounted on the side of equipment supporter, air distribution system, spray
Head combined system, storage powder combined system and intelligence control system between be attached using pressure hose, igniting combined system and
It is attached between intelligence control system using copper conductor wire.
2. the experimental provision of dust explosive characteristic according to claim 1, it is characterised in that the spray head combined system is
By nozzle and spray head base combination at metallic object, both nozzle and spray head pedestal junction are equipped with and reserve thin seam, to form height
Press annular airflow.
3. the experimental provision of dust explosive characteristic according to claim 1, it is characterised in that the storage powder combined system is
The metallic combination cylinder of disassembling cleaning, the two are connected to intelligence control system with pressure hose.
4. the experimental provision of dust explosive characteristic according to claim 1, it is characterised in that the igniter bracket is by excellent
Matter steel-pipe welding forms, and adjustable energy high-voltage pulses device and various kinds of sensors wherein can be set on igniter bracket simultaneously,
Its Arm portion can freely adjust the upright position of igniter, and igniting combined system is by copper wires by intelligence control system
Control.
5. the experimental method of dust explosive characteristic according to claim 1, it is characterised in that following steps:
St1: mobile piston is shifted onto the bottom of storage tube, the dust to be tested of large dosage is put into cylinder；
St2: being programmed setting to intelligence control system, realizes inlet period, the control of dust time and the duration of ignition respectively；
St3: the mixed gas output pressure of air distribution system is adjusted；
St4: remote opening intelligence control system, gradually ventilation component in control piper, is first opened logical at spray head combined system
Gas element, then opens the ventilation component at storage tube bottom plug, pushes mobile piston rapidly using high pressure gas, and then pushes pre-
Dust is set quickly to spray from spray head；
St5: by certain delay time after dust whole ejection, intelligence control system controls igniter energization igniting, completion
To the ignition process of dust cloud；
St6: experimenter operates high speed video system at a distance, records the process of dust ejection and ignition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811236260.3A CN109187635A (en) | 2018-10-23 | 2018-10-23 | A kind of interior experimental provision and method for measuring large dosage of dust explosive characteristic of open space |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811236260.3A CN109187635A (en) | 2018-10-23 | 2018-10-23 | A kind of interior experimental provision and method for measuring large dosage of dust explosive characteristic of open space |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109187635A true CN109187635A (en) | 2019-01-11 |
Family
ID=64942794
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811236260.3A Pending CN109187635A (en) | 2018-10-23 | 2018-10-23 | A kind of interior experimental provision and method for measuring large dosage of dust explosive characteristic of open space |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109187635A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111624140A (en) * | 2020-05-18 | 2020-09-04 | 武汉理工大学 | Device and method for measuring distribution of pulverized coal leakage flow field |
| CN114113456A (en) * | 2021-11-24 | 2022-03-01 | 安徽理工大学 | Unconfined gas cloud detonation experimental device and test method |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57175945A (en) * | 1981-04-23 | 1982-10-29 | Kanegafuchi Chem Ind Co Ltd | Detecting method for explosion of combustible gas and dust and its device |
| CN201366386Y (en) * | 2008-12-26 | 2009-12-23 | 孙晓军 | Nozzle |
| JP2011220814A (en) * | 2010-04-08 | 2011-11-04 | Sumitomo Chemical Co Ltd | Test apparatus and test method for dust explosion in fluid bed |
| CN102323374A (en) * | 2011-06-09 | 2012-01-18 | 中国科学技术大学 | Pre-mixed combustion experiment system capable of continuously blowing and spraying dust in open space |
| CN103801471A (en) * | 2014-01-17 | 2014-05-21 | 华大赛 | Pneumatic control anti-explosion ultrasonic dry mist nozzle and using method thereof |
| CN203992416U (en) * | 2014-08-26 | 2014-12-10 | 长沙骅骝冶金粉末有限公司 | A kind of tangential inlet atomizer |
| CN106908480A (en) * | 2017-03-31 | 2017-06-30 | 大连理工大学 | Dust explosion flame transmission measuring behavior experimental system |
| CN107782480A (en) * | 2017-11-17 | 2018-03-09 | 北京石油化工学院 | A kind of method of testing and device of the hybrid thing minimum ignition energy amount of combustible dust/fuel gas |
-
2018
- 2018-10-23 CN CN201811236260.3A patent/CN109187635A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57175945A (en) * | 1981-04-23 | 1982-10-29 | Kanegafuchi Chem Ind Co Ltd | Detecting method for explosion of combustible gas and dust and its device |
| CN201366386Y (en) * | 2008-12-26 | 2009-12-23 | 孙晓军 | Nozzle |
| JP2011220814A (en) * | 2010-04-08 | 2011-11-04 | Sumitomo Chemical Co Ltd | Test apparatus and test method for dust explosion in fluid bed |
| CN102323374A (en) * | 2011-06-09 | 2012-01-18 | 中国科学技术大学 | Pre-mixed combustion experiment system capable of continuously blowing and spraying dust in open space |
| CN103801471A (en) * | 2014-01-17 | 2014-05-21 | 华大赛 | Pneumatic control anti-explosion ultrasonic dry mist nozzle and using method thereof |
| CN203992416U (en) * | 2014-08-26 | 2014-12-10 | 长沙骅骝冶金粉末有限公司 | A kind of tangential inlet atomizer |
| CN106908480A (en) * | 2017-03-31 | 2017-06-30 | 大连理工大学 | Dust explosion flame transmission measuring behavior experimental system |
| CN107782480A (en) * | 2017-11-17 | 2018-03-09 | 北京石油化工学院 | A kind of method of testing and device of the hybrid thing minimum ignition energy amount of combustible dust/fuel gas |
Non-Patent Citations (2)
| Title |
|---|
| WEI GAO 等: "Flame propagation mechanisms in dust explosions", 《JOURNAL OF LOSS PREVENTION IN THE PROCESS INDUSTRIES》 * |
| XINYAN ZHANG 等: "Flame propagation behaviors of nano- and micro-scale PMMA dust explosions", 《JOURNAL OF LOSS PREVENTION IN THE PROCESS INDUSTRIES》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111624140A (en) * | 2020-05-18 | 2020-09-04 | 武汉理工大学 | Device and method for measuring distribution of pulverized coal leakage flow field |
| CN111624140B (en) * | 2020-05-18 | 2021-08-17 | 武汉理工大学 | Device and method for measuring distribution of pulverized coal leakage flow field |
| CN114113456A (en) * | 2021-11-24 | 2022-03-01 | 安徽理工大学 | Unconfined gas cloud detonation experimental device and test method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104634922B (en) | A kind of detachable solid fuel suspension combustion experiment proving installation and method of testing | |
| CN107782480B (en) | Method and device for testing minimum ignition energy of combustible dust/combustible gas mixture | |
| CN109187635A (en) | A kind of interior experimental provision and method for measuring large dosage of dust explosive characteristic of open space | |
| CN204594950U (en) | The constant volume combustion system analyzed is detected for solid fuel ignition | |
| CN107893711B (en) | A kind of gas hydrogen-oxygen torch type electric ignition device | |
| CN109991228A (en) | A kind of visual pressurization discrete particle kinetics experimental system | |
| CN105003357B (en) | Pasty propellant fuel gas generator ignition device based on solid rocket engine | |
| CN108802268A (en) | A kind of visualized experiment fuel droplet ignition temperature measuring device | |
| CN104950070A (en) | Solid propellant flameout critical pressure reduction rate testing method | |
| CN105115920A (en) | Experiment system and experiment method for testing ignition delay time of combustible gas | |
| CN103852486A (en) | Liquid mist blasting parameter testing system and liquid mist blasting parameter testing method | |
| RU2596797C1 (en) | Test bench for analyzing ignition and combustion of organo-water-coal fuel drop | |
| CN103968386B (en) | A kind of remotely ignition gas wake burner | |
| CN110702565B (en) | Simulation device for metal particle flow-following combustion in high-temperature multi-component environment and use method | |
| RU2631614C1 (en) | Stand for studying combustion characteristics and burning dancing droplets of organowater-coal fuel | |
| CN205449923U (en) | A combustion system for simulating punching press engine | |
| CN109187636A (en) | The experimental provision and method of dust explosive characteristic are measured under the conditions of a kind of visualization is isobaric | |
| CN102486309B (en) | Gasification oil burner | |
| CN105628566B (en) | A kind of synchro measure is sprayed the system and method for macro morphology and microscopic characteristics | |
| CN105509052A (en) | Novel burner with arc-shaped body jetting device | |
| CN211014093U (en) | Simulation experiment equipment for boiler heating surface | |
| CN207065564U (en) | A kind of low heat value ignition air gun | |
| CN204755105U (en) | Laser ignition installation | |
| CN112489548B (en) | Simulation test device and test method for fire extinguishing evaporation capacity of helicopter | |
| CN104963790B (en) | Laser ignition device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20190111 |
|
| WD01 | Invention patent application deemed withdrawn after publication |