CN102937606A - Explosion limit testing device of combustible gas under high-temperature condition - Google Patents
Explosion limit testing device of combustible gas under high-temperature condition Download PDFInfo
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- CN102937606A CN102937606A CN2012104077997A CN201210407799A CN102937606A CN 102937606 A CN102937606 A CN 102937606A CN 2012104077997 A CN2012104077997 A CN 2012104077997A CN 201210407799 A CN201210407799 A CN 201210407799A CN 102937606 A CN102937606 A CN 102937606A
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Abstract
The invention relates to an explosion limit testing device of combustible gas under a high-temperature condition. The device comprises a temperature data collection system, a heating temperature control system, and a supplied gas feeding/gas pumping and purging system. The supplied gas feeding/gas pumping and purging system comprises the following components connected in parallel: a delivering pipe of gas to be detected, an oxygen delivering pipe, an air delivering pipe, and a vacuum pump. The heating temperature control system comprises a round-bottomed flask testing chamber, a heating jacket, a temperature control thermocouple, and a heating furnace. The round-bottomed flask testing chamber is suspended in the heating furnace through an insulation supporting device. The testing device provided by the invention is a semi-closed testing device. A safety valve is provided above the flask, such that pressure can be released in time after explosion occurs, and the flask is prevented from being damaged by detonation pressure. Therefore, the explosion limit of combustible gas under high-temperature condition can be effectively measured, and temperature can be accurately controlled. An upper temperature limit can reach 800 DEG C. Also, the device is convenient to observe, such that testing accuracy is greatly improved.
Description
Technical field
The present invention relates to a kind of explosion limits proving installation, especially relate to a kind of inflammable gas explosion limits proving installation under hot conditions.
Background technology
Inflammable gas must evenly mix in certain concentration range with air, forms premix gas, meets ignition source and just can blast, and this concentration range is called explosion limits, or the explosion ratio limit.The explosion limits of inflammable gas be judge, estimate inflammable gas material fire risk one of important indicator.Explosion limits can be used for evaluating the size of combustion explosion of combustible gas danger, and as the inflammable gas classification with determine the foundation of its fire risk classification, the explosion limits scope is wider, inflammable gas blast danger larger.
The stainless steel proving installation of the many employings of at present existing high temperature explosion limits instrument have the slow defective of heating, and the antiknock pressure energy power of the higher material of temperature is poorer; And existing test unit temperature measurement range is helpless when needs are measured the high temperature explosion limits of inflammable gas generally in 200 ℃.
Summary of the invention
The technical problem to be solved in the present invention provides a kind of inflammable gas explosion limits proving installation under hot conditions; This explosion limits proving installation can be used for the explosion limits test in air, oxygen-enriched air or the pure oxygen, this device belongs to semi-enclosed proving installation, the flask top is provided with safety valve, can rear in time relieving pressure occur in blast, the protection flask is not damaged by detonation pressure, not only can effectively measure the explosion limits of inflammable gas under hot conditions, can accurately control temperature, upper temperature limit can reach 800 ℃; But also be convenient to observe, improved widely the accuracy of test.
For solving the problems of the technologies described above, the present invention adopts following technical scheme:
Inflammable gas is the explosion limits proving installation under hot conditions, comprises temperature data collecting system, heating temperature-control system and the distribution air inlet/purging system of bleeding;
The described distribution air inlet/purging system of bleeding comprises gas ventilation pipe to be measured, oxygen ventilation pipe, air snorkel and vacuum pump parallel with one another;
Described heating temperature-control system comprises: round-bottomed flask test cabinet, heating muff, temperature-control heat couple and heating furnace body;
Described round-bottomed flask test cabinet hangs in the heating furnace by the insulation supportive device, and described heating muff is enclosed within on the round-bottomed flask test cabinet outer wall, is equipped with temperature-control heat couple inside and outside the described round-bottomed flask test cabinet; Described round-bottomed flask test cabinet top is provided with safety valve.
Described temperature-control heat couple is connected with temperature data collecting system by data line;
Described gas ventilation pipe to be measured, oxygen ventilation pipe, air snorkel and vacuum pump lead to round-bottomed flask test cabinet bottom by common conduit.
Preferably, be equipped with mass flowmeter and safety valve on described gas ventilation pipe to be measured, oxygen ventilation pipe and the air snorkel, with control flow and switch pipeline.
Preferably, described heating furnace body is the electric heating crucible stove, has columniform interior thorax, can hold the round-bottomed flask test cabinet and keep the flask temperature even, and temperature can reach 800 ℃ or higher.
Preferably, described round-bottomed flask test cabinet adopts Pyrex.
Preferably, the temperature-control heat couple in the described round-bottomed flask test cabinet is the chromel-alumel thermopair; Be used for measuring the gas temperature in the flask, and often will recheck, can not use iron-constantan thermocouple.
Preferably, the temperature-control heat couple in the described round-bottomed flask test cabinet externally heated oven is occasionally other accurate thermopairs of chromel-alumel thermoelectricity.
Preferably, the eck place of described round-bottomed flask test cabinet is provided with the flame camera, this flame camera is by data line be connected with temperature data collecting system (namely a camera is connected with temperature data collecting system, when testing sample is blasted, can significantly observe experimental phenomena)
The present invention has following beneficial effect:
1) by gas distributing system accurately proportioning inflammable gas to be measured, oxygen ratio and can accurate control inflammable gas to be measured and the ratio of air.
2) can accurately control temperature by heating furnace, upper temperature limit can reach 800 ℃.
3) increase camera at bottleneck, be convenient to observe the flame situation when blasting;
4) this device is provided with safety valve above flask, in 1.5 times of pressure place take-offs of initial pressure, both can protection tester, and can effectively measure explosion limits again.
Description of drawings
Below in conjunction with accompanying drawing the specific embodiment of the present invention is described in further detail
Fig. 1 is structural representation of the present invention.
Embodiment
Embodiment 1
Inflammable gas of the present invention is the explosion limits proving installation under hot conditions, comprises temperature data collecting system 100, heating temperature-control system 200 and the distribution air inlet/purging system 300 of bleeding;
Temperature data collecting system 100 receives and disposal system for computing machine;
The described distribution air inlet/purging system 300 of bleeding comprises gas ventilation pipe 301 to be measured, oxygen ventilation pipe 302, air snorkel 303 and vacuum pump 304 parallel with one another;
Described heating temperature-control system 200 comprises: round-bottomed flask test cabinet 201, heating muff 202, temperature-control heat couple 203 and heating furnace body 204;
Described round-bottomed flask test cabinet 201 hangs in the heating furnace 204 by insulation supportive device 205, described heating muff 202 is enclosed within on round-bottomed flask test cabinet 201 outer walls, be provided with temperature-control heat couple 2031 in the described round-bottomed flask test cabinet 201, this temperature-control heat couple 2031 is chromel-alumel thermopairs; Be used for measuring the gas temperature in the flask, and often will recheck, can not use iron-constantan thermocouple; Be provided with temperature-control heat couple 2032 outside the described round-bottomed flask test cabinet 201, this temperature-control heat couple 2032 is chromel-alumel thermopairs; Described round-bottomed flask test cabinet 201 tops are provided with safety valve;
Described temperature- control heat couple 2031,2032 all is connected with temperature data collecting system 100 by data line;
Described gas ventilation pipe 301 to be measured, oxygen ventilation pipe 302, air snorkel 303 and vacuum pump 304 lead to round-bottomed flask test cabinet 201 bottoms by common conduit 305.
Be equipped with mass flowmeter 306 and safety valve 307 on described gas ventilation pipe 301 to be measured, oxygen ventilation pipe 302 and the air snorkel 303, with control flow and switch pipeline.
Described heating furnace body 204 is the electric heating crucible stove, has columniform interior thorax, can hold the round-bottomed flask test cabinet and keep the flask temperature even, and temperature can reach 800 ℃ or higher.
Described round-bottomed flask test cabinet 201 adopts the Pyrex material; Comprise round bottom and neck; With thick insulation supportive device round-bottomed flask test cabinet 201 is hung in the heating furnace body 204, its neck top is embedded in insulating lid cover 206 times, so that round-bottomed flask test cabinet 201 changes in the stove fully, the flask mouth is pushed down by graphite pads 207.
The eck place of described round-bottomed flask test cabinet 201 is provided with flame camera 208, this flame camera 208 is connected with temperature data collecting system 100 by data line, and (namely a camera is connected with temperature data collecting system, when testing sample is blasted, can significantly observe experimental phenomena)
It is as follows to utilize above-mentioned explosion limits proving installation to measure the principle of inflammable gas explosion limits under hot conditions:
1) round-bottomed flask test cabinet 201 is installed as shown in Figure 1, open temp data acquisition system (DAS) 100, default heating-up temperature, open heating furnace body 204 heating round-bottomed flask test cabinets 201, when the temperature of round-bottomed flask test cabinet 201 inside arrives needed setting value, adjust temperature by temperature data collecting system 100, make temperature keep stable, make whole system reach balance;
2) by calculating, in round-bottomed flask test cabinet 201, at the uniform velocity pass into a certain proportion of inflammable gas and air;
3) observe the flask interior temperature variation and flame whether occurs by 211 igniting of flame camera;
4) if do not observe flame propagation at ignition point, just think that the inflammable gas of round-bottomed flask test cabinet 201 inner certain proportionings is not blasted, with vacuum pump 304 round-bottomed flask test cabinet 201 internal gas are extracted out, repeat again 2～3 times, confirm.
5) repeating step 2～4 under the different proportionings of inflammable gas to be measured, oxygen and air is until obtain the explosion limits of inflammable gas;
6) stop ventilation, with vacuum pump 304 gas bleedings, closing test instrument, cleaning.
Obviously, the above embodiment of the present invention only is for example of the present invention clearly is described, and is not to be restriction to embodiments of the present invention.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here can't give all embodiments exhaustive.Everyly belong to the row that apparent variation that technical scheme of the present invention extends out or change still are in protection scope of the present invention.
Claims (7)
1. inflammable gas explosion limits proving installation under hot conditions is characterized in that: comprise temperature data collecting system, heating temperature-control system and the distribution air inlet/purging system of bleeding;
The described distribution air inlet/purging system of bleeding comprises gas ventilation pipe to be measured, oxygen ventilation pipe, air snorkel and vacuum pump parallel with one another;
Described heating temperature-control system comprises: round-bottomed flask test cabinet, heating muff, temperature-control heat couple and heating furnace body;
Described round-bottomed flask test cabinet hangs in the heating furnace by the insulation supportive device, and described heating muff is enclosed within on the round-bottomed flask test cabinet outer wall, is equipped with temperature-control heat couple inside and outside the described round-bottomed flask test cabinet;
Described temperature-control heat couple is connected with temperature data collecting system by data line;
Described gas ventilation pipe to be measured, oxygen ventilation pipe, air snorkel and vacuum pump lead to round-bottomed flask test cabinet bottom by common conduit;
Described round-bottomed flask test cabinet top is provided with safety valve.
2. explosion limits proving installation according to claim 1 is characterized in that: be equipped with mass flowmeter and safety valve on described gas ventilation pipe to be measured, oxygen ventilation pipe and the air snorkel.
3. explosion limits proving installation according to claim 1, it is characterized in that: described heating furnace body is the electric heating crucible stove, has columniform interior thorax.
4. explosion limits proving installation according to claim 1 is characterized in that: described round-bottomed flask test cabinet employing Pyrex material.
5. explosion limits proving installation according to claim 1 is characterized in that: the temperature-control heat couple in the described round-bottomed flask test cabinet is the chromel-alumel thermopair.
6. explosion limits proving installation according to claim 1 is characterized in that: the outer temperature-control heat couple of described round-bottomed flask test cabinet is the chromel-alumel thermopair.
7. explosion limits proving installation according to claim 1, it is characterized in that: the eck place of described round-bottomed flask test cabinet is provided with the flame camera, and this flame camera is connected with temperature data collecting system by data line.
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| CN2012104077997A CN102937606A (en) | 2012-10-23 | 2012-10-23 | Explosion limit testing device of combustible gas under high-temperature condition |
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| CN2012104077997A CN102937606A (en) | 2012-10-23 | 2012-10-23 | Explosion limit testing device of combustible gas under high-temperature condition |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104931672A (en) * | 2015-05-27 | 2015-09-23 | 中国石油化工股份有限公司 | Test method of safe critical partial pressure of methylacetylene gas |
| CN104931530A (en) * | 2015-05-27 | 2015-09-23 | 中国石油化工股份有限公司 | Test method of safe critical partial pressure of easily-decomposable gas |
| CN105136856A (en) * | 2015-10-13 | 2015-12-09 | 国家安全生产监督管理总局化学品登记中心 | Dust burning explosion tester with temperature-controllable ignition device |
| 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 |
| CN107884439A (en) * | 2017-12-13 | 2018-04-06 | 天津航天瑞莱科技有限公司 | The quick-fried decision maker of point of indoor gas is sampled in a kind of explosive atmosphere test case |
| CN107894442A (en) * | 2017-11-29 | 2018-04-10 | 北京理工大学 | A kind of HTHP combustible gas explosion limit test device |
| CN109270121A (en) * | 2018-10-11 | 2019-01-25 | 王夏珩 | A kind of apparatus for demonstrating for studying the combustible gas explosion limit |
| CN112730213A (en) * | 2020-11-30 | 2021-04-30 | 合肥通用机械研究院有限公司 | Gas-liquid accurate proportioning test device and test method under normal temperature and negative pressure |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010008135A (en) * | 2008-06-25 | 2010-01-14 | Gastec:Kk | Apparatus for explosion testing of combustible gas/vapor |
| CN101738415A (en) * | 2009-12-25 | 2010-06-16 | 中国科学院空间科学与应用研究中心 | Multi-functional combustion experimental system |
| CN102353694A (en) * | 2011-08-22 | 2012-02-15 | 中国石油化工股份有限公司 | Automatic gas self-ignition temperature testing device |
| CN202854080U (en) * | 2012-10-16 | 2013-04-03 | 中国石油化工股份有限公司 | Device for testing spontaneous ignition point in pure oxygen |
-
2012
- 2012-10-23 CN CN2012104077997A patent/CN102937606A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010008135A (en) * | 2008-06-25 | 2010-01-14 | Gastec:Kk | Apparatus for explosion testing of combustible gas/vapor |
| CN101738415A (en) * | 2009-12-25 | 2010-06-16 | 中国科学院空间科学与应用研究中心 | Multi-functional combustion experimental system |
| CN102353694A (en) * | 2011-08-22 | 2012-02-15 | 中国石油化工股份有限公司 | Automatic gas self-ignition temperature testing device |
| CN202854080U (en) * | 2012-10-16 | 2013-04-03 | 中国石油化工股份有限公司 | Device for testing spontaneous ignition point in pure oxygen |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104931672A (en) * | 2015-05-27 | 2015-09-23 | 中国石油化工股份有限公司 | Test method of safe critical partial pressure of methylacetylene gas |
| CN104931530A (en) * | 2015-05-27 | 2015-09-23 | 中国石油化工股份有限公司 | Test method of safe critical partial pressure of easily-decomposable gas |
| CN105136856A (en) * | 2015-10-13 | 2015-12-09 | 国家安全生产监督管理总局化学品登记中心 | Dust burning explosion tester with temperature-controllable ignition device |
| 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 |
| CN107894442A (en) * | 2017-11-29 | 2018-04-10 | 北京理工大学 | A kind of HTHP combustible gas explosion limit test device |
| CN107894442B (en) * | 2017-11-29 | 2019-08-06 | 北京理工大学 | A kind of high temperature and pressure combustible gas explosion limit test device |
| CN107884439A (en) * | 2017-12-13 | 2018-04-06 | 天津航天瑞莱科技有限公司 | The quick-fried decision maker of point of indoor gas is sampled in a kind of explosive atmosphere test case |
| CN109270121A (en) * | 2018-10-11 | 2019-01-25 | 王夏珩 | A kind of apparatus for demonstrating for studying the combustible gas explosion limit |
| CN112730213A (en) * | 2020-11-30 | 2021-04-30 | 合肥通用机械研究院有限公司 | Gas-liquid accurate proportioning test device and test method under normal temperature and negative pressure |
| CN112730213B (en) * | 2020-11-30 | 2022-08-02 | 合肥通用机械研究院有限公司 | Gas-liquid accurate proportioning test device and test method under normal temperature and negative pressure |
| CN112730213B8 (en) * | 2020-11-30 | 2022-09-30 | 合肥工业大学 | Gas-liquid accurate proportioning test device and test method under normal temperature and negative pressure |
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Application publication date: 20130220 |