CN108918355A - A kind of appraisal procedure of low density polyethylene (LDPE) smashed district responsive parameter - Google Patents
A kind of appraisal procedure of low density polyethylene (LDPE) smashed district responsive parameter Download PDFInfo
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- 229920001684 low density polyethylene Polymers 0.000 title claims abstract description 77
- 239000004702 low-density polyethylene Substances 0.000 title claims abstract description 77
- 238000000034 method Methods 0.000 title claims abstract description 56
- 239000000428 dust Substances 0.000 claims abstract description 98
- 238000012360 testing method Methods 0.000 claims abstract description 45
- 239000000843 powder Substances 0.000 claims abstract description 22
- 238000009826 distribution Methods 0.000 claims abstract description 16
- 238000013102 re-test Methods 0.000 claims abstract description 4
- LGDSHSYDSCRFAB-UHFFFAOYSA-N Methyl isothiocyanate Chemical compound CN=C=S LGDSHSYDSCRFAB-UHFFFAOYSA-N 0.000 claims description 6
- 230000001535 kindling effect Effects 0.000 claims description 4
- 238000004458 analytical method Methods 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 239000004744 fabric Substances 0.000 claims 2
- 238000011156 evaluation Methods 0.000 abstract description 9
- 238000004880 explosion Methods 0.000 description 12
- 238000004519 manufacturing process Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 5
- 238000004064 recycling Methods 0.000 description 4
- -1 Polyethylene Polymers 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 3
- 238000001035 drying Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 229920000573 polyethylene Polymers 0.000 description 3
- 238000013480 data collection Methods 0.000 description 2
- 230000003111 delayed effect Effects 0.000 description 2
- 238000010892 electric spark Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 150000001336 alkenes Chemical class 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000000071 blow moulding Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000005469 granulation Methods 0.000 description 1
- 230000003179 granulation Effects 0.000 description 1
- 239000000383 hazardous chemical Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
- 238000012502 risk assessment Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000009757 thermoplastic moulding Methods 0.000 description 1
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Abstract
The invention discloses a kind of appraisal procedures of low density polyethylene (LDPE) smashed district responsive parameter, choose five kinds of varigrained low density polyethylene (LDPE) industrial powders first as test specimen, obtain the meso-position radius of test specimen；By adjusting constant temperature furnace temperature and electrode ignition energy, retest is carried out, the minimum ignition temperature and minimum ignition energy amount data under the conditions of a variety of dust cloud concentration and meso-position radius are obtained；Nonlinear fitting is carried out to minimum ignition temperature and minimum ignition energy amount data, obtains the minimum ignition temperature of dust cloud and minimum ignition energy amount with median diameter, the functional relation of dust cloud concentration；The minimum ignition temperature and minimum ignition energy amount under the conditions of actual process are predicted based on granularity of dust distribution, dust cloud concentration under the premise of known live dust cloud concentration.The above method can realize quick, accurate evaluation to the i.e. minimum ignition temperature of its responsive parameter and minimum ignition energy amount by technical parameters such as median diameter, dust cloud concentration.
Description
Technical field
The present invention relates to dust explosion studying technological domain more particularly to a kind of low density polyethylene (LDPE) smashed district sensibility
The appraisal procedure of parameter.
Background technique
Polyethylene belongs to typical synthetic organic material, in conjunction with its own physicochemical property, existing accident case it is found that poly- second
Alkene powder has flammable and explosive.Low density polyethylene (LDPE) is most important one kind in polyethylene product, it is suitble to thermoplastic molding
The various moulding process of processing are mainly used for making various film products, injection-molded item, medical apparatus and blow molding hollow molding
Product etc..In recent years, domestic and international petrochemical industry rapidly develops, the quantity and production capacity of low density polyethylene (LDPE) process units also with
Rapid growth, low density polyethylene (LDPE) produce overall process in, the techniques such as granulation, drying, pneumatic conveying, discharging are often accompanied by more highly concentrated
The presence of dust cloud, while the various ignitions source such as easy to produce static electricity, electric spark, mechanical hot surface, friction are spent, if not being subject to effectively
Then easily in local space dust explosion accident occurs for control.
The minimum ignition temperature of dust cloud and minimum ignition energy amount are the weights for characterizing low density polyethylene (LDPE) smashed district sensibility
Parameter is wanted, is all had to effective selection of such powder related process safe design, risk assessment and accident prevention control measure
There is important realistic meaning.The minimum ignition temperature of dust cloud and minimum ignition energy amount are by dust self attributes, dust cloud distribution shape
The influence of the various factors such as state is more significant.Under the premise of powder sample and its physicochemical property determine, granularity of dust distribution and
Dust cloud concentration becomes the core influence factor of the two parameters, is directed to the minimum ignition temperature of polyethylene powder dust clouds in the prior art
And the related data of minimum ignition energy amount is not comprehensive enough, it is then more rare specifically for the data of low density polyethylene (LDPE) dust cloud,
And still lack the qualitative assessment solution for being suitable for the minimum ignition temperature of low density polyethylene (LDPE) dust cloud and minimum ignition energy amount at present
Scheme.
Summary of the invention
The object of the present invention is to provide a kind of appraisal procedure of low density polyethylene (LDPE) smashed district responsive parameter, this method
It can be realized by technical parameters such as median diameter, dust cloud concentration to the i.e. minimum ignition temperature of its responsive parameter and most
Quick, the accurate evaluation of small ignition energy.
The purpose of the present invention is what is be achieved through the following technical solutions：
A kind of appraisal procedure of low density polyethylene (LDPE) smashed district responsive parameter, the method includes：
Step 1 chooses five kinds of varigrained low density polyethylene (LDPE) industrial powders as test specimen, and utilizes granularity point
Analyzer analyzes the size distribution of the test specimen, obtains the meso-position radius of the test specimen；
Step 2, by adjusting constant temperature furnace temperature and electrode ignition energy, carry out retest, it is dense to obtain a variety of dust clouds
Minimum ignition temperature and minimum ignition energy amount data under the conditions of degree and meso-position radius；
Step 3, minimum ignition temperature obtained to step 2 and minimum ignition energy amount data carry out nonlinear fitting, obtain
To the minimum ignition temperature of dust cloud and minimum ignition energy amount with median diameter, the functional relation of dust cloud concentration；
Step 4, the functional relation obtained according to step 3 are based on dust grain under the premise of known live dust cloud concentration
Degree distribution, dust cloud concentration predict the minimum ignition temperature and minimum ignition energy amount under the conditions of actual process；
Step 5, minimum ignition temperature obtained to step 2 and minimum ignition energy amount data compare and analyze, and obtain
Minimum ignition temperature and minimum ignition energy amount data under the conditions of different meso-position radius；
Step 6, minimum ignition temperature obtained to step 5 and minimum ignition energy amount data carry out nonlinear fitting, obtain
The functional relation changed to minimum ignition temperature and minimum ignition energy amount with meso-position radius；
Step 7, the functional relation obtained according to step 6 under the premise of dust cloud concentration is unknown at the scene, are based on dust grain
Degree distribution is to calculate the minimum ignition temperature and minimum ignition energy amount in proposed technique.
As seen from the above technical solution provided by the invention, the above method can be by median diameter, dust cloud
The technical parameters such as concentration come realize to the i.e. minimum ignition temperature of its responsive parameter and minimum ignition energy amount it is quick, accurately comment
Estimate.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, required use in being described below to embodiment
Attached drawing be briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for this
For the those of ordinary skill in field, without creative efforts, it can also be obtained according to these attached drawings other
Attached drawing.
Fig. 1 is that the appraisal procedure process of low density polyethylene (LDPE) smashed district responsive parameter provided in an embodiment of the present invention is shown
It is intended to；
Fig. 2 is Godbert-Greenwald constant temperature oven standard test device used by example of the embodiment of the present invention
Structural schematic diagram；
Fig. 3 is Harttman pipe schematic structural diagram of testing device used by example of the embodiment of the present invention.
Specific embodiment
With reference to the attached drawing in the embodiment of the present invention, technical solution in the embodiment of the present invention carries out clear, complete
Ground description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based on this
The embodiment of invention, every other implementation obtained by those of ordinary skill in the art without making creative efforts
Example, belongs to protection scope of the present invention.
The embodiment of the present invention is described in further detail below in conjunction with attached drawing, is implemented as shown in Figure 1 for the present invention
The appraisal procedure flow diagram for the low density polyethylene (LDPE) smashed district responsive parameter that example provides, the method includes：
Step 1 chooses five kinds of varigrained low density polyethylene (LDPE) industrial powders as test specimen, and utilizes granularity point
Analyzer analyzes the size distribution of the test specimen, obtains the meso-position radius of the test specimen；
For specific example, the test specimen of selection may include five kinds of different grain sizes, first to the test sample
Product dry within 24 hours；
Then it is analyzed using size distribution of the Particle Size Analyzer to five kinds of test specimens, obtains the test specimen
Meso-position radius be followed successively by 13.74 μm, 62.15 μm, 82.97 μm, 120.8 μm and 234.0 μm.
Step 2, by adjusting constant temperature furnace temperature and electrode ignition energy, carry out retest, it is dense to obtain a variety of dust clouds
Minimum ignition temperature and minimum ignition energy amount data under the conditions of degree and meso-position radius；
In the step, it is specifically referred to GB/T 16429-1996《The minimum ignition temperature measuring method of dust cloud》And
GB/T 16428-1996《Dust cloud minimum ignition energy quantity measuring method》, Godbert-Greenwald constant temperature oven is respectively adopted
Standard test device and 1.2L Harttman pipe test device test the test specimen in different dusts cloud concentration and difference
The minimum ignition temperature of dust cloud and minimum ignition energy amount data under the conditions of meso-position radius.
For example, it is illustrated in figure 2 the perseverance of Godbert-Greenwald used by example of the embodiment of the present invention
Warm furnace standard test apparatus structure schematic diagram is illustrated in figure 3 the pipe of Harttman used by example of the embodiment of the present invention
Schematic structural diagram of testing device, the constant temperature oven standard test device include observation ward 1, constant temperature furnace body 2, dust cabin 3, dust collector
4, solenoid valve 5, air accumulator 6, automatic control press 7, temperature control system 8, regulated power supply 9 and compressed air bottle 10.The 1.2L
Harttman pipe test device includes compressed air bottle 11, pressure gauge 12, air accumulator 13, solenoid valve 14, automatic control and data
Acquisition system 15, dust recycling device 16, ignitor 17, tube body 18, delayed time system 19 and computer 20 are based on above-mentioned two survey
Trial assembly is set, and complete test process is：
1) air accumulator 6 is made to have the air of certain pressure by automatic control press 7 and compressed air bottle 10 first.
2) a certain amount of certain low density polyethylene (LDPE) powder sample by drying in 24 hours is filled to dust collector 4, tightens storage
Dirt device lid.
3) 2 temperature of constant temperature furnace body is controlled under a certain steady temperature by temperature control system 8.
4) discharge of the stored air of air accumulator 6 is controlled using regulated power supply 9 and solenoid valve 5, certain in dust collector 4 is low
Density polyethylene powder sprays, and forms the preferable dust cloud of diffusivity by dust cabin 3 and is allowed to uniformly be diffused into heating furnace body 2
In.
5) combustion case of certain low density polyethylene (LDPE) dust cloud is observed by 2 bottom observation ward 1 of heating furnace body.
If 6) observed in observation ward 1, apparent flame occurs, and is considered as kindling；If occurring without flame or flame
Time lag 3s or more, then be considered as and do not catch fire.10 experiments are carried out under the conditions of each temperature, if all not occurring apparent flame,
Think that certain low density polyethylene (LDPE) powder sample cannot be lighted at this temperature.
7) data are recorded, 1 internal residual solid of observation ward and gas are cleared up, it is real to prepare minimum ignition temperature test next time
It tests.
8) under the premise of pressure gauge 12, air accumulator 13 is made to have the air of certain pressure by compressed air bottle 11.
9) a certain amount of certain low density polyethylene (LDPE) powder sample by drying in 24 hours is filled to dust recycling device 16.
10) by automatic control and data collection system 15, according to actual test situation by the remotely located igniting of computer 20
17 electric spark energy of electrode and 19 data of delayed time system.
11) row of stored air in solenoid valve 14 and air accumulator 13 is controlled with data collection system 15 by automatically controlling
It puts, sprays certain low density polyethylene (LDPE) powder on dust recycling device 16, to form the preferable dust cloud of diffusivity and be allowed to equal
It is even to be diffused into tube body 18, while by 17 excitation energy of ignitor, and then light dust cloud.
12) 18 flame propagation condition of tube body is observed, leaving if at least 60mm is propagated in spark position if flame is kindling,
It is on the contrary then do not catch fire.
13) data are recorded, tube body 18 and 16 internal residual solid of dust recycling device and gas are cleared up, are prepared next time minimum
Ignition energy test experiments.
For example, by taking five groups of test specimens as an example, meso-position radius is followed successively by 13.74 μm, 62.15 μm, 82.97 μm, 120.8
μm and 234.0 μm, minimum ignition temperature and minimum kindling under the conditions of obtained a variety of specific dust cloud concentration and meso-position radius
Energy datum is respectively as shown in the following table 1 and table 2：
The minimum ignition temperature data of table 1
2 minimum ignition energy amount data of table
Step 3, minimum ignition temperature obtained to step 2 and minimum ignition energy amount data carry out nonlinear fitting, obtain
To the minimum ignition temperature of dust cloud and minimum ignition energy amount with median diameter, the functional relation of dust cloud concentration；
Here, the minimum ignition temperature of obtained dust cloud and minimum ignition energy amount are with median diameter, dust cloud concentration
Functional relation be embodied as：
In formula, MITC is the minimum ignition temperature of dust cloud, and unit is DEG C；MIG is minimum ignition energy amount, unit mJ；Dm
For meso-position radius, unit is μm；C is dust cloud concentration, unit kgm-3。
Step 4, the functional relation obtained according to step 3 are based on dust grain under the premise of known live dust cloud concentration
Degree distribution, dust cloud concentration predict the minimum ignition temperature and minimum ignition energy amount under the conditions of actual process；
In this step, the functional relation obtained with specific reference to step 3, under the premise of known live dust cloud concentration,
True minimum ignition temperature under the conditions of actual process and minimum is calculated based on granularity of dust distribution, dust cloud concentration
Fiery energy；It here, specifically can be under the premise of obtaining technique scene dust cloud concentration, by median diameter, dust cloud concentration
Two parameters substitute into the functional relation of above-mentioned steps 3, thus true minimum ignition temperature under the conditions of obtaining actual process and
Minimum ignition energy amount infers the explosion sensibility of certain low density polyethylene (LDPE) powder under the conditions of actual process, and then assists realizing real
The effective evaluation of border technique dust explosion availability risk.
Step 5, minimum ignition temperature obtained to step 2 and minimum ignition energy amount data compare and analyze, and obtain
Minimum ignition temperature and minimum ignition energy amount data under the conditions of different meso-position radius；
For example, by taking five groups of test specimens as an example, meso-position radius is followed successively by 13.74 μm, 62.15 μm, 82.97 μm, 120.8
μm and 234.0 μm, minimum ignition temperature and minimum ignition energy under obtained a certain concentration conditions under the conditions of different meso-position radius
Data are measured as shown in the following table 3 and table 4：
The minimum ignition temperature data of table 3
4 minimum ignition energy amount data of table
Step 6, minimum ignition temperature obtained to step 5 and minimum ignition energy amount data carry out nonlinear fitting, obtain
The functional relation changed to minimum ignition temperature and minimum ignition energy amount with meso-position radius；
Here, the functional relation that obtained minimum ignition temperature and minimum ignition energy amount change with meso-position radius specifically indicates
For：
MITC=361.66534+0.66741Dm-0.00535Dm 2+1.48192×10-5Dm 3
MIG=-0.88606+4.08581Dm-0.03357Dm 2+9.62022×10-5Dm 3
Wherein, MITC is minimum ignition temperature；MIG is minimum ignition energy amount；DmFor meso-position radius.
Step 7, the functional relation obtained according to step 6 under the premise of dust cloud concentration is unknown at the scene, are based on dust grain
Degree distribution is to calculate the minimum ignition temperature and minimum ignition energy amount in proposed technique.
Here, specifically under the premise of proposed technique scene dust cloud concentration is unknown, median diameter data is substituted into and are walked
In rapid 6 functional relation, to predict minimum ignition temperature and minimum ignition energy amount, and then assist realizing proposed technique dust
The effective evaluation for highest risk of exploding.
It is worth noting that, the content being not described in detail in the embodiment of the present invention belongs to professional and technical personnel in the field's public affairs
The prior art known.
Above-mentioned appraisal procedure is described in detail with specific application example below：
Application example 1, the existing a set of low density polyethylene (LDPE) power production technique of certain hazardous chemical manufacturing enterprise, the technique
In, there are dust explosion risks in Pneumatic conveying pipeline and feed bin, according to the related requirement of national security production supervision, at present
It needs to evaluate the security risk status of the technique.In evaluation procedure, need to fully understand the dust at two above position
The minimum ignition temperature of cloud and minimum ignition energy amount, and then infer the explosion sensibility of low density polyethylene (LDPE) powder, effective evaluation goes out
The dust explosion risk of the production technology.
Obtain minimum ignition temperature and minimum ignition energy amount data in the following ways first.
1) test to obtain the low density polyethylene (LDPE) powder in Pneumatic conveying pipeline and feed bin by dust cloud concentration determination instrument
Dust clouds concentration.
2) it is sampled respectively in gas transmission pipeline and feed bin, obtains a certain amount of low density polyethylene (LDPE) powder sample.
3) it tests to obtain the meso-position radius of two position powder samples by grain size analysis instrument.
4) meso-position radius at two positions, dust cloud concentration data are successively substituted into the functional relation of above-described embodiment step 3
In, the minimum ignition temperature of the dust cloud being calculated in Pneumatic conveying pipeline and feed bin and minimum ignition energy amount.
Application example 2, the existing a set of low density polyethylene (LDPE) power production technique of certain chemical company, currently, the enterprise is from ring
It protects and the angle of occupational safety and health is set out, plan to increase a dry bag-type dust remover in production technology end, for collecting
Remaining low density polyethylene (LDPE) dust in production process.There is dust explosion risk in the process of running in the deduster.According to state
The related requirement of family's safety manufacture supervising needs to carry out Safety Pre-Evaluation to rebuilding technology before technique reconstruction construction.It comments in advance
During valence, the minimum ignition temperature and minimum ignition energy amount of dust cloud inside the deduster are needed to be grasped, and then may infer that
The explosion sensibility of low density polyethylene (LDPE) powder, effective evaluation go out the maximum risk of explosion of the deduster.In the unknown deduster
Under the premise of internal dust cloud concentration, minimum ignition temperature and minimum ignition energy amount data are obtained in the following ways.
1) in the regional area of deduster installation position, sampling obtains a certain amount of low density polyethylene (LDPE) powder sample.
2) it tests to obtain the meso-position radius of powder sample by grain size analysis instrument.
3) meso-position radius data are substituted into the functional relation of above-described embodiment step 7, is calculated in quasi- newly-increased deduster
The minimum ignition temperature of dust cloud and minimum ignition energy amount data.
It is worth noting that, the content being not described in detail in the embodiment of the present invention belongs to professional and technical personnel in the field's public affairs
The prior art known.
In conclusion the method for the embodiment of the present invention can both not know about live low density polyethylene (LDPE) dust cloud concentration
Under the premise of minimum ignition temperature and minimum ignition energy amount gone out based on granularity of dust forecast of distribution, and then assist realizing proposed technique
Effective pre assessment of dust explosion highest risk；Simultaneously dust grain can also be based under the premise of known live dust cloud concentration
Degree distribution, dust cloud concentration predict the minimum ignition temperature and minimum ignition energy amount under the conditions of actual process, and then assist
Realize the effective evaluation of actual process dust explosion availability risk.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Within the technical scope of the present disclosure, any changes or substitutions that can be easily thought of by anyone skilled in the art,
It should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with the protection model of claims
Subject to enclosing.
Claims (5)
1. a kind of appraisal procedure of low density polyethylene (LDPE) smashed district responsive parameter, which is characterized in that the method includes：
Step 1 chooses five kinds of varigrained low density polyethylene (LDPE) industrial powders as test specimen, and utilizes Particle Size Analyzer
The size distribution of the test specimen is analyzed, the meso-position radius of the test specimen is obtained；
Step 2, by adjusting constant temperature furnace temperature and electrode ignition energy, carry out retest, obtain a variety of dust cloud concentration and
Minimum ignition temperature and minimum ignition energy amount data under the conditions of meso-position radius；
Step 3, minimum ignition temperature obtained to step 2 and minimum ignition energy amount data carry out nonlinear fitting, obtain powder
The minimum ignition temperature of dust clouds and minimum ignition energy amount are with median diameter, the functional relation of dust cloud concentration；
Step 4, the functional relation obtained according to step 3, based on granularity of dust point under the premise of known live dust cloud concentration
Cloth, dust cloud concentration predict the minimum ignition temperature and minimum ignition energy amount under the conditions of actual process；
Step 5, minimum ignition temperature obtained to step 2 and minimum ignition energy amount data compare and analyze, and obtain difference
Minimum ignition temperature and minimum ignition energy amount data under the conditions of meso-position radius；
Step 6, minimum ignition temperature obtained to step 5 and minimum ignition energy amount data carry out nonlinear fitting, obtain most
The functional relation that low ignition temperature and minimum ignition energy amount change with meso-position radius；
Step 7, the functional relation obtained according to step 6, under the premise of dust cloud concentration is unknown at the scene, based on granularity of dust point
Cloth calculates the minimum ignition temperature and minimum ignition energy amount in proposed technique.
2. the appraisal procedure of low density polyethylene (LDPE) smashed district responsive parameter according to claim 1, which is characterized in that
It in step 1, is analyzed using size distribution of the Particle Size Analyzer to the test specimen, obtains the middle position of the test specimen
The process of diameter is specially：
Selected test specimen includes five kinds of different grain sizes, dry within 24 hours to the test specimen first；
Then it is analyzed using size distribution of the grain size analysis instrument to five kinds of test specimens, obtains the test specimen
Meso-position radius is followed successively by 13.74 μm, 62.15 μm, 82.97 μm, 120.8 μm and 234.0 μm.
3. the appraisal procedure of low density polyethylene (LDPE) smashed district responsive parameter according to claim 1, which is characterized in that
In the step 2, Godbert-Greenwald constant temperature oven standard test device and Harttman pipe test device are specifically used
To test minimum ignition temperature and minimum kindling of the test specimen under the conditions of different dusts cloud concentration and different meso-position radius
Energy.
4. the appraisal procedure of low density polyethylene (LDPE) smashed district responsive parameter according to claim 1, which is characterized in that
In step 3, the minimum ignition temperature of obtained dust cloud and minimum ignition energy amount are with median diameter, the function of dust cloud concentration
Relationship is embodied as：
In formula, MITC is the minimum ignition temperature of dust cloud, and unit is DEG C；MIG is minimum ignition energy amount, unit mJ；DmFor middle position
Diameter, unit are μm；C is dust cloud concentration, unit kgm-3。
5. the appraisal procedure of low density polyethylene (LDPE) smashed district responsive parameter according to claim 1, which is characterized in that
In step 6, obtained minimum ignition temperature and minimum ignition energy amount are embodied as with the functional relation that meso-position radius changes：
MITC=361.66534+0.66741Dm-0.00535Dm 2+1.48192×10-5Dm3
MIG=-0.88606+4.08581Dm-0.03357Dm 2+9.62022×10-5Dm3
Wherein, MITC is minimum ignition temperature；MIG is minimum ignition energy amount；DmFor meso-position radius.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109856333A (en) * | 2019-01-31 | 2019-06-07 | 南京林业大学 | One kind being based on the foreseeable wooden dust real-time monitoring device of minimum ignition and its monitoring method |
| CN113065794A (en) * | 2021-04-19 | 2021-07-02 | 北京石油化工学院 | Dust explosion risk assessment method and device |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101499672B1 (en) * | 2014-04-29 | 2015-03-06 | 대한민국 | A standard aerosol sampling system |
| CN104749208A (en) * | 2015-04-20 | 2015-07-01 | 国家安全生产监督管理总局化学品登记中心 | Testing method for lowest ignition temperature of dust cloud |
| CN104749217A (en) * | 2015-03-27 | 2015-07-01 | 中国石油大学(华东) | Ultralow temperature combustible gas explosion minimum ignition energy testing system and method |
| US20150355088A1 (en) * | 2010-08-23 | 2015-12-10 | Scattering Solutions, Inc. | Dynamic and depolarized dynamic light scattering colloid analyzer |
| CN105891254A (en) * | 2016-06-30 | 2016-08-24 | 东北大学 | Dust-layer ignition sensitivity testing device and method under action of electric sparks |
| CN105954314A (en) * | 2016-04-25 | 2016-09-21 | 东北大学 | Device and method for testing sensitivity to spontaneous ignition of flammable dust |
| 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 |
| CN107817065A (en) * | 2017-09-28 | 2018-03-20 | 中北大学 | A kind of compact detonation pressure measuring system based on bragg grating |
| CN107832520A (en) * | 2017-11-02 | 2018-03-23 | 北京石油化工学院 | A kind of gas explosion Evaluation of High Temperature Disaster method in tunnel |
| CN107831028A (en) * | 2017-12-06 | 2018-03-23 | 北京石油化工学院 | A kind of more mouthfuls of coupling venting of dust explosion measure of merit devices of combustible dust and method of testing |
-
2018
- 2018-05-04 CN CN201810419758.7A patent/CN108918355B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20150355088A1 (en) * | 2010-08-23 | 2015-12-10 | Scattering Solutions, Inc. | Dynamic and depolarized dynamic light scattering colloid analyzer |
| KR101499672B1 (en) * | 2014-04-29 | 2015-03-06 | 대한민국 | A standard aerosol sampling system |
| CN104749217A (en) * | 2015-03-27 | 2015-07-01 | 中国石油大学(华东) | Ultralow temperature combustible gas explosion minimum ignition energy testing system and method |
| CN104749208A (en) * | 2015-04-20 | 2015-07-01 | 国家安全生产监督管理总局化学品登记中心 | Testing method for lowest ignition temperature of dust cloud |
| CN105954314A (en) * | 2016-04-25 | 2016-09-21 | 东北大学 | Device and method for testing sensitivity to spontaneous ignition of flammable dust |
| CN105891254A (en) * | 2016-06-30 | 2016-08-24 | 东北大学 | Dust-layer ignition sensitivity testing device and method under action of electric sparks |
| CN107817065A (en) * | 2017-09-28 | 2018-03-20 | 中北大学 | A kind of compact detonation pressure measuring system based on bragg grating |
| CN107832520A (en) * | 2017-11-02 | 2018-03-23 | 北京石油化工学院 | A kind of gas explosion Evaluation of High Temperature Disaster method in tunnel |
| 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 |
| CN107831028A (en) * | 2017-12-06 | 2018-03-23 | 北京石油化工学院 | A kind of more mouthfuls of coupling venting of dust explosion measure of merit devices of combustible dust and method of testing |
Non-Patent Citations (2)
| Title |
|---|
| 庞磊 等: ""粉尘云浓度对HDPE 粉尘云最低着火温度的影响"", 《中国安全生产科学技术》 * |
| 毕明超 等: ""超细聚苯乙烯微球粉体的燃爆特性研究"", 《安全与环境学报》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109856333A (en) * | 2019-01-31 | 2019-06-07 | 南京林业大学 | One kind being based on the foreseeable wooden dust real-time monitoring device of minimum ignition and its monitoring method |
| CN109856333B (en) * | 2019-01-31 | 2024-04-16 | 南京林业大学 | Real-time wood dust monitoring device and method based on minimum ignition energy prediction |
| CN113065794A (en) * | 2021-04-19 | 2021-07-02 | 北京石油化工学院 | Dust explosion risk assessment method and device |
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|---|---|
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