CN105352997A - Method for determining burning and explosion of dust via temperature-controllable ignition device - Google Patents
Method for determining burning and explosion of dust via temperature-controllable ignition device Download PDFInfo
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- CN105352997A CN105352997A CN201510661742.3A CN201510661742A CN105352997A CN 105352997 A CN105352997 A CN 105352997A CN 201510661742 A CN201510661742 A CN 201510661742A CN 105352997 A CN105352997 A CN 105352997A
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- 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
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Abstract
The invention relates to a method for determining burning and explosion of dust via a temperature-controllable ignition device. The main objective of the invention is to overcome the problem of inauthentic test phenomena and test results in the prior art. According to the method, a dust burning and explosion determination apparatus is employed for determining burning and explosion of dust. The dust burning and explosion determination apparatus comprises a quartz glass tube, thermocouples, an igniting head, a thermostat, a data acquisition unit and a computer, wherein the igniting head is fixed at the bottom of the quartz glass tube and connected with one end of the thermostat; the other end of the thermostat is connected with the computer; one end of at least one thermocouple is inserted into the quartz glass tube, and the other end of the thermocouple is connected with a temperature acquisition unit; and the temperature acquisition unit is connected with the computer. The technical scheme of installation of one multi-channel temperature acquisition unit in the computer perfectly overcomes the above-mentioned problem; and the dust burning and explosion determination apparatus is applicable to determination of burning and explosion of dust.
Description
Technical field
The dust that the present invention relates to a kind of controllable temperature portfire fires method for measuring.
Background technology
Have both at home and abroad in a large amount of enterprises production technology and relate to dust, the industrial accident caused by dust in recent years also happens occasionally.CN201220347525.9 relates to the explosion-proof protective device of a kind of spray for dust suppression equipment, relates to the shielding protection of equipment.This explosion-proof protective device feature comprises base and shell; Described base and shell form a closed cavity jointly, and in this cavity air pressure higher than ambient air outside air pressure.
Portfire is of paramount importance is exactly control ignition energy, and the size of energy can not provided to make regulation to portfire in " VDI2263-1.6 ", this just may cause testing the ignition energy that uses at every turn can difference to some extent, directly affects experimental phenomena and test findings.
The present invention solves this problem targetedly.
Summary of the invention
Technical matters to be solved by this invention is the problem of experimental phenomena and test findings distortion in prior art, provides a kind of dust of new controllable temperature portfire to fire method for measuring.The method is used for dust and fires in mensuration, has experimental phenomena and test findings advantage accurately.
For solving the problem, the technical solution used in the present invention is as follows: a kind of dust of controllable temperature portfire fires method for measuring, adopt dust to fire determinator to carry out dust and fire mensuration, described dust fires determinator and comprises quartz glass tube, thermopair, igniter head, thermostat, data acquisition unit and computing machine, igniter head is fixed on the bottom of quartz glass tube, and be connected with thermostat one end, the thermostat other end is connected with computing machine, at least one thermopair one end is inserted in quartz glass tube, the other end is connected with Temperature sampler, Temperature sampler is connected with computing machine, computing machine is equipped with a multichannel temperature collector, described method comprises the steps:
(1) according to required test condition, determinand is loaded in quartz glass tube;
(2) switch on power, thermopair is fixed on the position of specifying;
(3) open digital display liquid crystal thermostat and computing machine, then open the computer recording page, enter temperature real time recording interface;
(4) required ignition temperature is set, and sample is heated;
(5) observe the temperature variations of sample, check and record firing (situation) of sample, determining its decomposes and the temperature fired according to recorded data.
In technique scheme, preferably, by computer software or be used alone digital display liquid crystal thermostat and carry out temperature control.
In technique scheme, preferably, described quartz glass tube is fixed on test tube base.
In technique scheme, preferably, described thermopair quantity is three.
In technique scheme, preferably, described thermostat constant-temperature precision is 1 DEG C.
Principle of the present invention be dust is put into a sealed bottom and bottom with the quartz glass tube of controllable temperature portfire, and to be placed on test tube flat.For recording the situation of change of temperature when dust fires on the position having three thermopairs to be fixed in quartz glass tube to specify.Connect heater wire power supply, heat test is carried out to sample and the situation of change of its temperature under using sensor record, observe dust and whether decomposition occurs fires.
The temperature that the maximum difference of this method and " VDI2263 " it is possible to lighting a fire controls.Portfire is of paramount importance is exactly control ignition energy, and the size of energy can not provided to make regulation to portfire in " VDI2263-1.6 ", this just may cause testing the ignition energy that uses at every turn can difference to some extent, directly affects experimental phenomena and test findings.Manufacture and design a kind of controllable temperature portfire in this method, the size of each ignition temperature and energy can have been controlled, ensure that accuracy and the repdocutbility of test findings.Have both at home and abroad in a large amount of enterprises production technology and relate to dust, the industrial accident caused by dust in recent years also happens occasionally.The continuous explosion test of this method for causing after measuring dust formation compound decomposes is larger concerning using value the scientific research institutions of these enterprises, security study, mechanism for testing.This method is by temperature variation after record dust formation compound decomposes and fire (burning) phenomenon and judge the firing property of this material and obtain its decomposition and fire temperature, method successively employs flour, cloquintocetmexyl acid, ammonium nitrate have carried out repeatedly verifying, method and test unit stable, the accurate control temperature of energy also obtains test findings, achieves good technique effect.
Accompanying drawing explanation
Fig. 1 is the structural representation of device of the present invention.
In Fig. 1,1 is thermopair; 2 is quartz glass tube; 3 is igniter head; 4 is Temperature sampler; 5 is computing machine; 6 is thermostat.
Below by embodiment, the invention will be further elaborated, but be not limited only to the present embodiment.
Embodiment
[embodiment 1]
As shown in Figure 1, the dust blasting device of controllable temperature portfire is made up of the quartz glass tube of a sealed bottom, base, three thermopairs, igniter head, digital display liquid crystal thermostat (constant-temperature precision 1 DEG C) and six parts such as multi-channel data acquisition system device and computing machine.Wherein hyaline-quartz pipe, base are customization, thermopair, digital display liquid-crystal controller, Multichannel data acquisition device and computing machine is outsourcing, and igniter head is self design.
Wherein igniter head is fixed on the bottom of quartz glass tube, is connected with digital display liquid crystal thermostat, and digital display liquid crystal thermostat is connected with computing machine, can pass through computer software control ignition temperature, also can be used alone digital display liquid crystal thermostat and carry out temperature control; Three thermopairs are fixed on assigned address (see Fig. 1, the modes such as iron stand can be used to fix), and are connected on computing machine, and computing machine is equipped with a multichannel temperature collector; Quartz glass tube is fixed on test tube base.
Test procedure:
This device need be arranged on and operate with in good ventilation and explosion-protection equipment.
(1) according to required test condition, determinand is loaded in quartz glass tube, and be placed on base;
(2) switch on power, three thermopairs are fixed on the position of specifying;
(3) open digital display liquid crystal thermostat and computing machine, then open the computer recording page, enter temperature real time recording interface;
(4) required ignition temperature is set, and sample is heated;
(5) observe the temperature variations of sample, check and record sample fire (or burning) situation.
Reset new ignition temperature, repeat aforesaid operations step, until obtain satisfied test findings.
The present invention is by temperature variation after record dust formation compound decomposes and fires the firing property that (burning) phenomenon judges this material, successively employ flour, cloquintocetmexyl acid, ammonium nitrate carried out repetition test, plant running is stablized, can accurate control temperature and log.
Claims (5)
1. the dust of a controllable temperature portfire fires method for measuring, adopt dust to fire determinator to carry out dust and fire mensuration, described dust fires determinator and comprises quartz glass tube, thermopair, igniter head, thermostat, data acquisition unit and computing machine, igniter head is fixed on the bottom of quartz glass tube, and be connected with thermostat one end, the thermostat other end is connected with computing machine, at least one thermopair one end is inserted in quartz glass tube, the other end is connected with Temperature sampler, Temperature sampler is connected with computing machine, computing machine is equipped with a multichannel temperature collector, described method comprises the steps:
(1) according to required test condition, determinand is loaded in quartz glass tube;
(2) switch on power, thermopair is fixed on the position of specifying;
(3) open digital display liquid crystal thermostat and computing machine, then open the computer recording page, enter temperature real time recording interface;
(4) required ignition temperature is set, and sample is heated;
(5) observe the temperature variations of sample, check and record firing (situation) of sample, determining its decomposes and the temperature fired according to recorded data.
2. the dust of controllable temperature portfire fires method for measuring according to claim 1, it is characterized in that by computer software or is used alone digital display liquid crystal thermostat and carries out temperature control.
3. the dust of controllable temperature portfire fires method for measuring according to claim 1, it is characterized in that described quartz glass tube is fixed on test tube base.
4. the dust of controllable temperature portfire fires method for measuring according to claim 1, it is characterized in that described thermopair quantity is three.
5. the dust of controllable temperature portfire fires method for measuring according to claim 1, it is characterized in that described thermostat constant-temperature precision is 1 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510661742.3A CN105352997A (en) | 2015-10-13 | 2015-10-13 | Method for determining burning and explosion of dust via temperature-controllable ignition device |
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| CN201510661742.3A CN105352997A (en) | 2015-10-13 | 2015-10-13 | Method for determining burning and explosion of dust via temperature-controllable ignition device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106841300A (en) * | 2017-03-24 | 2017-06-13 | 上海化工研究院有限公司 | A kind of Combined industry dust explosion analog demenstration system |
| CN107219257A (en) * | 2017-06-07 | 2017-09-29 | 上海化工研究院有限公司 | A kind of soft closed cycle dust explosion simulation test device and application method |
| CN109668927A (en) * | 2017-10-17 | 2019-04-23 | 国家安全生产监督管理总局化学品登记中心 | Measure the experimental rig and method of the minimum ignition temperature of dust cloud |
| CN109827994A (en) * | 2019-04-14 | 2019-05-31 | 宁波工程学院 | A kind of experimental provision and method measuring dust cloud combustion explosion characteristic |
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| CN107219257A (en) * | 2017-06-07 | 2017-09-29 | 上海化工研究院有限公司 | A kind of soft closed cycle dust explosion simulation test device and application method |
| CN107219257B (en) * | 2017-06-07 | 2019-11-12 | 上海化工研究院有限公司 | A kind of soft closed cycle dust explosion simulation test device and application method |
| CN109668927A (en) * | 2017-10-17 | 2019-04-23 | 国家安全生产监督管理总局化学品登记中心 | Measure the experimental rig and method of the minimum ignition temperature of dust cloud |
| CN109827994A (en) * | 2019-04-14 | 2019-05-31 | 宁波工程学院 | A kind of experimental provision and method measuring dust cloud combustion explosion characteristic |
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Application publication date: 20160224 |
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