CN105092642A - Method for testing explosion limit of liquid mixture - Google Patents
Method for testing explosion limit of liquid mixture Download PDFInfo
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- CN105092642A CN105092642A CN201510493529.6A CN201510493529A CN105092642A CN 105092642 A CN105092642 A CN 105092642A CN 201510493529 A CN201510493529 A CN 201510493529A CN 105092642 A CN105092642 A CN 105092642A
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Abstract
The invention relates to a method for testing the explosion limit of a liquid mixture. The problem that in the prior art, a testing result is inaccurate is mainly solved. According to the technical scheme, the method for testing the explosion limit of the liquid mixture is adopted, a liquid mixture explosion limit testing device is adopted for carrying out a liquid mixture explosion limit test, a sample is added to a sample adding cup of the testing device, the temperature of the sample adding cup and a constant-temperature chamber is controlled, and concentration of mixed gas of the gas phase liquid to be tested and air is controlled by controlling the temperature and volatilization time; then ignition is carried out for testing, a testing result is observed through an observation window, the problem is solved well, and the method can be used for testing the explosion limit of the liquid mixture.
Description
Technical field
The present invention relates to a kind of liquid mixture explosion limits method of testing.
Background technology
At present for testing the method for explosion limits mainly according to method of testings such as GBT21844-2008 " standard test method of compound (steam and gas) inflammability concentration limit ", GB/T12474-2008 " in air combustible gas explosion limit assay method " and ASTME681-04 " chemicals (steam and gas) explosion limits standard method of test ", mainly for gas or steam.CN201010509028.X relates to a kind of combustible gas explosion limit test system in non-standard state, it is characterized in that it comprise air distributing device, explosive release, attemperating unit, data acquisition processing device; Described explosive release comprises explosion-proof tank body and heat insulation sheath, between explosion-proof tank body and heat insulation sheath, heating element is installed, in explosion-proof tank body, dividing plate is installed, the inner chamber of explosion-proof tank body is separated into gas buffer room and gas explosion chamber by dividing plate, dividing plate is provided with the solenoid valve of conducting gas buffer room and gas explosion chamber, explosive release input port be connected with gas buffer room, described input port is also other is connected to vacuum pump; Compensator or trimmer pressure sensor and buffering temperature sensor are installed in described gas buffer room, temperature sensor before exploding, blast front pressure transducer, lighter and the explosion pressure sensor as Exploding test are installed in described gas burst room.
There are some problems in existing method when the test being applied to liquid mixture, as: 1. when containing water in liquid mixture, vacuumize rear sample introduction by existing method of testing, the water volatile quantity that volatile quantity is less in the normal process used is expanded virtually, very large on test result impact.Even if 2. in liquid mixture be all flammable organism, when measurement, there is obvious difference in the gas phase composition of the composition and the naturally volatilization of liquid mixture in production, storage, transport and use procedure that vacuumize steam when rear sample introduction makes to test, it is not very accurate for causing the test result of existing method of testing to be applied in chemicals production, storage, transport and use procedure.
The present invention solves this problem targetedly.
Summary of the invention
Technical matters to be solved by this invention is the inaccurate problem of test result in prior art, provides a kind of new liquid mixture explosion limits method of testing.The method is used for, in the test of liquid mixture explosion limits, having test result advantage accurately.
For solving the problem, the technical solution used in the present invention is as follows: a kind of liquid mixture explosion limits method of testing, liquid mixture explosion limits proving installation is adopted to carry out the test of liquid mixture explosion limits, described proving installation mainly comprises and fires storehouse, Fast Heating constant temperature enclosure, constant temperature enclosure, sample adding cup, fire bottom storehouse and be connected with Fast Heating constant temperature enclosure top, sample adding cup is positioned in Fast Heating constant temperature enclosure, and with fire storehouse and communicate, arrange in the region that sample adding cup communicates with Fast Heating constant temperature enclosure and movably isolate baffle plate, fire position in storehouse in constant temperature enclosure, spring is fixed on constant temperature enclosure top, and be connected with buffering steel disc one end, the buffering steel disc other end is fixed on rubber cover plate, rubber cover plate is positioned over constant temperature enclosure top, temperature sensor and igniter head are inserted in by rubber cover plate and fire in storehouse, constant temperature enclosure sidewall is provided with view window, fire top, storehouse and be provided with thieff hatch, sample is added in the sampling cup of described proving installation, control the temperature of sample adding cup and constant temperature enclosure, by to the control to the gas phase of testing liquid and the mixture strength of air of the control realization of temperature and volatilizes, then igniting is tested, by view window observation test result.
In technique scheme, preferably, fire described in bottom storehouse and be provided with stirrer.
In technique scheme, preferably, the specification of described igniter head meets the requirement to igniting in GB/T12474-2008 " in air combustible gas explosion limit assay method ".
In technique scheme, preferably, firing storehouse described in is glass cylinder.
In technique scheme, preferably, appropriate test mixing gas is got before igniting to analyze the concentration of combination gas.
When this method avoids the mixed vapour preparing flammable vapor and air in existing method of testing, liquid, aqueous sample moisture evaporation diffusing capacity is significantly higher than the actual volatile quantity in chemicals production, storage, transport and use procedure; When avoiding the mixed vapour preparing flammable vapor and air in existing method of testing, there is marked difference in the actual volatile quantity in liquid mixture in the volatile quantity of each component and chemicals production, storage, transport and use procedure, the productive life of test result to reality has more directive significance, achieves good technique effect.
Accompanying drawing explanation
Fig. 1 is the structural representation of device of the present invention.
In Fig. 1:
1-fires storehouse 7-rubber cover plate 13-view window
2-constant temperature enclosure 8-cushions steel disc
3-Fast Heating constant temperature enclosure 9-thieff hatch
4-sample adding cup 10-temperature sensor
5-isolates baffle plate 11-igniter head
6-stirrer 12-spring
Below by embodiment, the invention will be further elaborated, but be not limited only to the present embodiment.
Embodiment
[embodiment 1]
A kind of liquid mixture explosion limits method of testing, adopt proving installation as shown in Figure 1, fire bottom storehouse and be connected with Fast Heating constant temperature enclosure top, sample adding cup is positioned in Fast Heating constant temperature enclosure, and with fire storehouse and communicate, arrange in the region that sample adding cup communicates with Fast Heating constant temperature enclosure and movably isolate baffle plate, fire position in storehouse in constant temperature enclosure, spring is fixed on constant temperature enclosure top, and be connected with buffering steel disc one end, the buffering steel disc other end is fixed on rubber cover plate, rubber cover plate is positioned over constant temperature enclosure top, temperature sensor and igniter head are inserted in by rubber cover plate and fire in storehouse, constant temperature enclosure sidewall is provided with view window, fire top, storehouse and be provided with thieff hatch
The specific embodiments of this patent is:
(1) specification of critical piece:
1. fire storehouse and adopt diameter 19cm, the glass cylinder of high 18cm.
2. sample adding cup adopts diameter 10cm, the glass cylinder of high 5cm.
3. stirrer adopts the steel disc of diameter 6cm.
4. the specification of igniter head should meet the requirement to igniting in GB/T12474-2008 " in air combustible gas explosion limit assay method ".
(2) testing procedure:
1. connected by device, constant temperature enclosure is set to target temperature;
2. in sample adding cup, add sample under normal pressure, Fast Heating constant temperature enclosure temperature is set to predicted temperature (the blast high-low limit of liquid can correspond to corresponding blast high-low limit temperature), opens isolation baffle plate, turn on agitator, record volatilizes;
3. close isolation baffle plate, stir balance 5-10min, close stirrer, sampling;
4. light a fire;
5. observe and whether have flame propagation.
Obviously, this method well solve the composition of steam when explosion limits moisture that existing testing tool tests liquid, aqueous potpourri affects very large problem and test to test result and liquid mixture producing, store, there is obvious difference, the insignificant problem of test result in the gas phase composition of volatilization naturally in transport and use procedure.Test result is accurate, has more directive significance to the productive life of reality.
Claims (5)
1. a liquid mixture explosion limits method of testing, liquid mixture explosion limits proving installation is adopted to carry out the test of liquid mixture explosion limits, described proving installation mainly comprises and fires storehouse, Fast Heating constant temperature enclosure, constant temperature enclosure, sample adding cup, fire bottom storehouse and be connected with Fast Heating constant temperature enclosure top, sample adding cup is positioned in Fast Heating constant temperature enclosure, and with fire storehouse and communicate, arrange in the region that sample adding cup communicates with Fast Heating constant temperature enclosure and movably isolate baffle plate, fire position in storehouse in constant temperature enclosure, spring is fixed on constant temperature enclosure top, and be connected with buffering steel disc one end, the buffering steel disc other end is fixed on rubber cover plate, rubber cover plate is positioned over constant temperature enclosure top, temperature sensor and igniter head are inserted in by rubber cover plate and fire in storehouse, constant temperature enclosure sidewall is provided with view window, fire top, storehouse and be provided with thieff hatch, sample is added in the sampling cup of described proving installation, control the temperature of sample adding cup and constant temperature enclosure, by to the control to the gas phase of testing liquid and the mixture strength of air of the control realization of temperature and volatilizes, then igniting is tested, by view window observation test result.
2. liquid mixture explosion limits method of testing according to claim 1, fires described in it is characterized in that bottom storehouse and is provided with stirrer.
3. liquid mixture explosion limits method of testing according to claim 1, is characterized in that the specification of described igniter head meets the requirement to igniting in GB/T12474-2008 " in air combustible gas explosion limit assay method ".
4. liquid mixture explosion limits method of testing according to claim 1, firing storehouse described in it is characterized in that is glass cylinder.
5. liquid mixture explosion limits method of testing according to claim 1, gets appropriate test mixing gas to analyze the concentration of combination gas before it is characterized in that igniting.
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| CN201510493529.6A CN105092642B (en) | 2015-08-13 | 2015-08-13 | Liquid mixture explosion limit method of testing |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106324033A (en) * | 2016-08-16 | 2017-01-11 | 西安近代化学研究所 | Visualized explosive cooking-off and gas product analysis device |
| CN109668931A (en) * | 2017-10-17 | 2019-04-23 | 中国石油化工股份有限公司 | The quickly device and method of test fuel gas firing temperature |
| CN109884117A (en) * | 2019-03-29 | 2019-06-14 | 上海化工研究院有限公司 | A kind of pressure water buffer-type explosion system safety testing device |
| CN110940698A (en) * | 2018-09-06 | 2020-03-31 | 中国石油化工股份有限公司 | Explosion limit testing device for difficult-to-volatilize liquid and application thereof |
| CN111879819A (en) * | 2020-07-31 | 2020-11-03 | 上海化工研究院有限公司 | Closed-loop circulating type volatile liquid explosion limit measuring device |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106324033A (en) * | 2016-08-16 | 2017-01-11 | 西安近代化学研究所 | Visualized explosive cooking-off and gas product analysis device |
| CN109668931A (en) * | 2017-10-17 | 2019-04-23 | 中国石油化工股份有限公司 | The quickly device and method of test fuel gas firing temperature |
| CN110940698A (en) * | 2018-09-06 | 2020-03-31 | 中国石油化工股份有限公司 | Explosion limit testing device for difficult-to-volatilize liquid and application thereof |
| CN109884117A (en) * | 2019-03-29 | 2019-06-14 | 上海化工研究院有限公司 | A kind of pressure water buffer-type explosion system safety testing device |
| CN109884117B (en) * | 2019-03-29 | 2021-11-30 | 上海化工研究院有限公司 | Pressurized-water buffering type explosiveness testing device |
| CN111879819A (en) * | 2020-07-31 | 2020-11-03 | 上海化工研究院有限公司 | Closed-loop circulating type volatile liquid explosion limit measuring device |
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