CN101975717A - Combustible gas explosion limit test system under non-standard state - Google Patents
Combustible gas explosion limit test system under non-standard state Download PDFInfo
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- CN101975717A CN101975717A CN201010509028.XA CN201010509028A CN101975717A CN 101975717 A CN101975717 A CN 101975717A CN 201010509028 A CN201010509028 A CN 201010509028A CN 101975717 A CN101975717 A CN 101975717A
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- 238000010438 heat treatment Methods 0.000 claims abstract description 26
- 238000012545 processing Methods 0.000 claims abstract description 7
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Abstract
A combustible gas explosion limit test system in a non-standard state is characterized by comprising a gas distribution device, an explosion device, a temperature control device and a data acquisition and processing device; the explosion device comprises an explosion-proof tank body and a heat-insulating sheath, a heating element is arranged between the explosion-proof tank body and the heat-insulating sheath, a partition plate is arranged in the explosion-proof tank body, the inner cavity of the explosion-proof tank body is divided into a gas buffer chamber and a gas explosion chamber by the partition plate, an electromagnetic valve for conducting the gas buffer chamber and the gas explosion chamber is arranged on the partition plate, an input port of the explosion device is communicated with the gas buffer chamber, and a vacuum pump is connected beside the input port; the gas explosion chamber is internally provided with a buffer pressure sensor and a buffer temperature sensor, and the gas explosion chamber is internally provided with a temperature sensor before explosion, a pressure sensor before explosion, an igniter and an explosion pressure sensor for explosion test. The invention has simple structure and good operability, and solves the problem of combustible gas deflagration characteristic detection under non-standard states such as high temperature and high pressure.
Description
Technical field
The present invention relates to a kind of safety instrumentation, especially the gas in a kind of airtight container is in the proving installation of flammable gas explosion ultimate value under the non-standard condition of High Temperature High Pressure or normal temperature high voltage, flammable gas explosion limit test system under specifically a kind of nonstandard state.
Background technology
At present, in chemical industry and the petrochemical production process, inflammable gas adopts closed container or pipeline to store usually or carries.Because the effect of suffering restraints, the gas burst meeting produces higher pressure and pressure climbing speed, to such an extent as to cause casualties and property loss.Combustible (inflammable gas, steam and dust) must evenly mix in certain concentration range with air (or oxygen), form premix gas, meeting ignition source just can blast, this concentration range is called explosion limits, or the explosion ratio limit, it can be used for evaluating inflammable gas and fire dangerous size, can be used as the foundation of fire-proof and explosion-proof Safety Design, for example determine the fire resistance rating of buildings, design house ventilating system etc.
At present, the product of the great majority test flammable gas explosion limit all only is confined to the explosion limits of inflammable gas under the testing standard state, and less for the research of flammable gas explosion limit test technology and device under the off-rating.1996, AdolfK ü hnerAG designs the spherical blast of 20 L proving installation, adopt the circulation distribution to mix, can test the blast characteristics of inflammable gas (liquid vapors) in the room temperature to 230 ℃, and 1993, the Zhang Jinglin invention has designed inflammable gas (liquid vapors) blast characteristics proving installation, this device can be tested the explosion limits and the minimum ignition energy of inflammable gas (liquid vapors) in the room temperature to 300 ℃, more than involved equipment all under normal pressure, change temperature and test, do not relate to the change of pressure.The determinator that also not can be used for (as High Temperature High Pressure, normal temperature high voltage etc.) flammable gas explosion limit under the off-rating does not at present have the pertinent literature report yet.
Summary of the invention
The objective of the invention is all under condition of normal pressure, to carry out at existing inflammable gas detonation test, measured value can not accurately reflect the problem of inflammable gas actual operating conditions, designs flammable gas explosion limit test system under a kind of nonstandard state that can be used for High Temperature High Pressure or normal temperature high voltage.
Technical scheme of the present invention is:
Flammable gas explosion limit test system under a kind of nonstandard state is characterized in that it comprises:
One air distributing device 1, this air distributing device 1 comprises distribution jar 5, and the input end of distribution jar 5 links to each other with inflammable gas source of the gas 6 and distribution source of the gas 7 respectively, and one tunnel output of distribution jar 5 is connected with the input port 9 of explosive release 2; Another road output of distribution jar 5 links to each other with the input end of supercharge pump 8, and the output terminal of supercharge pump (8) is connected with the input port 9 of explosive release 2.
One explosive release 2, this explosive release 2 comprises explosion-proof tank body 12 and heat insulation sheath 14, between explosion-proof tank body 12 and the heat insulation sheath 14 heating element 13 is installed, in the explosion-proof tank body 12 dividing plate 15 is installed, dividing plate 15 is separated into gas buffer chamber 16 and gas explosion chamber 17 with the inner chamber of explosion-proof tank body 12, gas buffer chamber and gas explosion chamber are measure-alike, volume equates, the solenoid valve 18 of conducting gas buffer chamber 16 and gas explosion chamber 17 is installed on the dividing plate 15, the input port 9 of explosive release 2 is connected with gas buffer chamber 16, the also other vacuum pump 19 that is connected in described input port 9; Compensator or trimmer pressure sensor 20 and buffering temperature sensor 21 are installed, the explosion pressure sensor 25 that the preceding temperature sensor 22 of blast, the preceding pressure transducer 23 of blast, lighter 24 is installed and tests usefulness as blast in described gas burst chamber 17 in described gas buffer chamber 16;
One attemperating unit 3, this attemperating unit 3 are used for controlling according to the temperature surveyed of temperature sensor 22 before the buffering temperature sensor 21 of explosive release 2 and the blast and the difference of design temperature the start and stop of heating element 13;
One data acquisition processing device 4, this data collector 4 mainly is made up of the explosion pressure sensor 25, signal amplification circuit 26, data acquisition circuit 27 and the computing machine 28 that are installed in the described gas burst chamber 17, explosion pressure sensor 25 links to each other with the input end of signal amplification circuit 26, the output terminal of signal amplification circuit 26 links to each other with the input end of data acquisition circuit 27, and the output terminal of data acquisition circuit 27 links to each other with computing machine 28.
The input end of described distribution jar 5 links to each other with the output terminal of distributing instrument 11 (model can be GH-1), and the input end of distributing instrument 11 links to each other with inflammable gas source of the gas 6 and distribution source of the gas 7 respectively.
Described distribution source of the gas 7 is a pure air.
The heating arrangement 10 that the inflammable gas that flows out distribution jar 5 is heated is installed on the output terminal of distribution jar 5.
Described heating element 13 is electrical heating elements or heat conduction coil pipe.
Described attemperating unit 3 is mainly by heating element 13, input oil pump 30, output oil pump 31, closed heater 32, sealing refrigerator 33 and water flowing heat interchanger 34 and temperature controller 35 are formed, heat conduction coil pipe 29 as heating element 13 is installed between explosion-proof tank body 12 and the heat insulation sheath 14, heat conduction coil pipe 29 links to each other with the output terminal of input oil pump 30, the output terminal of heat conduction coil pipe 29 links to each other with the input end of output oil pump 31, output oil pump 31 output terminal respectively with closed heater 32, the input end of sealing refrigerator 33 and water flowing heat interchanger 34 links to each other, at the output terminal and corresponding closed heater 32 that connect output oil pump 31, be separately installed with the electric control valve 36 that is controlled by temperature controller 35 and controls the corresponding pipeline break-make on the pipeline between the input end of sealing refrigerator 33 and water flowing heat interchanger 34, the control end of described electric control valve 36 links to each other with the control output end of temperature controller 35, closed heater 32, the output terminal of sealing refrigerator 33 and water flowing heat interchanger 34 links to each other with the input end of output oil pump 30; The signal input part of temperature controller 35 links to each other with the signal output part of buffering temperature sensor 21 and blast temperature sensor 22.
Beneficial effect of the present invention:
The present invention is rational in infrastructure, and is powerful, the automaticity height.By control pressurer system and temperature control system can test out that inflammable gas is pressed in High Temperature High Pressure, normal temperature high voltage, normal temperature high voltage, high temperature and off-rating such as low-temp low-pressure under explosion limits.
The present invention can be widely used in chemical industry and the petrochemical production device combustible gas explosion risk analysis under the actual condition, is used for fire-proof and explosion-proof Safety Design, prevents the generation of particularly serious explosion accident, brings significant social and economic benefit.
Description of drawings
Fig. 1 is that system of the present invention forms structural representation.
Fig. 2 be explosive release of the present invention structural representation.
Fig. 3 is the structural representation of attemperating unit of the present invention.
Fig. 4 is a gas distributing system structural representation of the present invention.
Fig. 5 is a data acquisition system (DAS) structural representation of the present invention.
Fig. 6 is a pressure control fundamental diagram of the present invention.
Embodiment
The present invention is further illustrated below in conjunction with drawings and Examples.
Shown in Fig. 1-5.
Flammable gas explosion limit test system under a kind of nonstandard state, it is mainly by air distributing device 1, explosive release 2, attemperating unit 3 and data acquisition processing device 4 are formed, as shown in Figure 1, air distributing device 1(wherein is as shown in Figure 4) comprise distribution jar 5, the input end of distribution jar 5 can adopt gas cylinder with inflammable gas source of the gas 6(respectively or directly link to each other with gas generating unit) and distribution source of the gas 7(can be pure air or other inert gas) link to each other, for the combined amount of accurate control inflammable gas with the distribution (air) of being joined, a distributing instrument 11 (model can be GH-1) can be installed before the input end of distribution jar 5, the input end of distributing instrument links to each other with inflammable gas source of the gas 6 and distribution source of the gas 7 respectively, also can require to install corresponding flowmeter on the distribution pipeline according to control when specifically implementing, electric-air valve, electric control elements such as retaining valve are to improve the automatization level of control.The a road the most basic output of distribution jar 5 is connected with the input port 9 of explosive release 2; During concrete enforcement, in order to adapt to the requirement of Hi-pot test, 5 increases by a tunnel of distribution jar have the output of supercharge pump 8, the output terminal of supercharge pump 8 is connected with the input port 9 of explosive release 2, so both can in explosive release 2, import atmosphere gas, also can import gases at high pressure, make pressure rises in the gas buffer chamber in the explosive release 2 to more than two times of the pressure that needs explosion time.In addition, in order to make the inflammable gas that enters in the explosive release 2 have temperature, the heating arrangement 10(that the inflammable gas that flows out distribution jar 5 is heated also can be installed on one or two output terminal of distribution jar 5 individually or simultaneously can adopt heating wire heating, oil bath heating etc.).
Experimental implementation process of the present invention is: (1) at first assembles explosive release and experimental apparatus according to Fig. 1, air distributing device 1, explosive release 2, attemperating unit 3 and data acquisition processing device have been linked and packed, check the circuit of various parts, and guarantee to connect well the testing fixture impermeability; (2) preparing certain density flammable premixed gas body by distributing instrument is stored in the distribution jar; (3) import experimental temperature in temperature controller, the debugging test macro makes each passage in running order, waiting signal; (4) starting vacuum pump 19 makes explosive release be evacuated to negative pressure-0.006MPa, when the explosive release temperature reaches experimental temperature, opens solenoid valve, to the indoor slow conveying flammable premixed gas body of gas buffer, the indoor compensator or trimmer pressure sensor of gas buffer begins the pressure signal of receiver gases surge chamber, according to the experimental pressure situation, start supercharge pump, and setup pressure value; (5) satisfy when imposing a condition when gas buffer chamber gaseous tension, automaton cuts out solenoid valve automatically and stops to carry the flammable premixed gas body; (6) when pressure and temperature all reaches requirement of experiment, leave standstill certain hour, the flammable premixed gas body is mixed, the solenoid valve of opening between gas buffer chamber and the gas burst chamber is slowly inflated the gas burst chamber, and the preceding pressure transducer of blast simultaneously begins the pressure signal of receiver gases explosion chamber.When the indoor pressure of gas burst reached experimental pressure, automaton cut out solenoid valve automatically and stops to charge into the flammable premixed gas body; (7) the cleaning personnel are left standstill experimental provision to the safety zone, and the flammable premixed gas body is mixed, and igniting blasting gas subsequently by explosion pressure sensor test pressure signal, and passes to data collecting instrument with signal, carries out collection, processing and the analysis of data.
Below in conjunction with Fig. 6 the condition that surge chamber gaseous tension P1 of the present invention satisfies is done an explanation.
[0028] 
Original pressure after the inflation of-gas buffer chamber, MPa;
-gas buffer chamber volume,
-experimental pressure, MPa;
If the pressure of final surge chamber and explosion chamber all is experimental pressure P, according to The Ideal-Gas Equation and mole law of conservation:
Put in order:
By
=
=1
:
Explosive release is evacuated in advance,
, can ignore
The influence that causes, therefore
The part that the present invention does not relate to prior art that maybe can adopt all same as the prior art is realized.
Claims (7)
1. flammable gas explosion limit test system under the nonstandard state is characterized in that it comprises:
One air distributing device (1), this air distributing device (1) comprises distribution jar (5), the input end of distribution jar (5) links to each other with inflammable gas source of the gas (6) and distribution source of the gas (7) respectively, one tunnel output of distribution jar (5) is connected with the input port (9) of explosive release (2), another road output of distribution jar (5) links to each other with the input end of supercharge pump (8), and the output terminal of supercharge pump (8) is connected with the input port (9) of explosive release (2);
One explosive release (2), this explosive release (2) comprises explosion-proof tank body (12) and heat insulation sheath (14), between explosion-proof tank body (12) and the heat insulation sheath (14) heating element (13) is installed, dividing plate (15) is installed in the explosion-proof tank body (12), dividing plate (15) is separated into gas buffer chamber (16) and gas explosion chamber (17) with the inner chamber of explosion-proof tank body (12), the solenoid valve (18) of conducting gas buffer chamber (16) and gas explosion chamber (17) is installed on the dividing plate (15), the flammable premixed gas body input port (9) of explosive release (2) is connected with gas buffer chamber (16), described input port (9) also other vacuum pump (19) that is connected to; Compensator or trimmer pressure sensor (20) and buffering temperature sensor (21) are installed, the explosion pressure sensor (25) that the preceding temperature sensor (22) of blast, the preceding pressure transducer (23) of blast, lighter (24) is installed and tests usefulness as blast in described gas burst chamber (17) in described gas buffer chamber (16);
One attemperating unit (3), this attemperating unit (3) are used for the start and stop according to the buffering temperature sensor (21) of explosive release (2) and blast temperature sensor (22) temperature of being surveyed and the difference of design temperature control heating element (13);
One data acquisition processing device (4), this data collector (4) mainly is made up of the explosion pressure sensor (25), signal amplification circuit (26), data acquisition circuit (27) and the computing machine (28) that are installed in the described gas burst chamber (17), explosion pressure sensor (25) links to each other with the input end of signal amplification circuit (26), the output terminal of signal amplification circuit (26) links to each other with the input end of data acquisition circuit (27), and the output terminal of data acquisition circuit (27) links to each other with computing machine (28).
2. flammable gas explosion limit test system under the nonstandard state according to claim 1, the input end that it is characterized in that described distribution jar (5) links to each other with the output terminal of distributing instrument (11), and the input end of distributing instrument (11) links to each other with inflammable gas source of the gas (6) and distribution source of the gas (7) respectively.
3. flammable gas explosion limit test system under the nonstandard state according to claim 1 and 2 is characterized in that described distribution source of the gas (7) is a pure air.
4. flammable gas explosion limit test system under the nonstandard state according to claim 1 is characterized in that the size of described gas buffer chamber (16) and gas explosion chamber (17) is all identical with volume.
5. flammable gas explosion limit test system under the nonstandard state according to claim 1 is characterized in that described heating element (13) is electrical heating elements or heat conduction coil pipe.
6. flammable gas explosion limit test system under the nonstandard state according to claim 1, it is characterized in that described attemperating unit (3) is mainly by heating element (13), input oil pump (30), output oil pump (31), closed heater (32), sealing refrigerator (33) and water flowing heat interchanger (34) and temperature controller (35) are formed, heat conduction coil pipe (29) as heating element (13) is installed between explosion-proof tank body (12) and the heat insulation sheath (14), the input end of heat conduction coil pipe (29) links to each other with the output terminal of input oil pump (30), the output terminal of heat conduction coil pipe (29) links to each other with the input end of output oil pump (31), output oil pump (31) output terminal respectively with closed heater (32), the input end of sealing refrigerator (33) and water flowing heat interchanger (34) links to each other, at the output terminal and corresponding closed heater (32) that connect output oil pump (31), be separately installed with the electric control valve (36) that is controlled by temperature controller (35) and controls the corresponding pipeline break-make on the pipeline between the input end of sealing refrigerator (33) and water flowing heat interchanger (34), the control end of described electric control valve (36) links to each other with the control output end of temperature controller (35), closed heater (32), the output terminal of sealing refrigerator (33) and water flowing heat interchanger (34) links to each other with the input end of output oil pump (30); The signal input part of temperature controller (35) links to each other with the signal output part of buffering temperature sensor (21) and the preceding temperature sensor (22) of blast.
7. flammable gas explosion limit test system under the nonstandard state according to claim 1 is characterized in that being equipped with on the output terminal of described distribution jar (5) heating arrangement (10) that the inflammable gas that flows out distribution jar (5) is heated.
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| CN201010509028XA CN101975717B (en) | 2010-10-18 | 2010-10-18 | Combustible gas explosion limit test system under non-standard state |
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| CN201010509028XA CN101975717B (en) | 2010-10-18 | 2010-10-18 | Combustible gas explosion limit test system under non-standard state |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102788815A (en) * | 2012-08-24 | 2012-11-21 | 中煤科工集团重庆研究院 | Exploding tank used for ultralow temperature gas explosion characteristic test |
| CN102809519A (en) * | 2012-09-02 | 2012-12-05 | 王利兵 | Gas chemical instability intelligent test device |
| CN102818821A (en) * | 2012-08-24 | 2012-12-12 | 中煤科工集团重庆研究院 | Combustible gas explosion feature experiment system in ultralow temperature environment |
| CN102937604A (en) * | 2012-10-23 | 2013-02-20 | 中国石油化工股份有限公司 | Explosion limit determining device and determining method |
| CN102937603A (en) * | 2012-10-19 | 2013-02-20 | 中国石油化工股份有限公司 | High-temperature high-pressure explosion limit tester, method for determining explosion limit, and application thereof |
| CN103033441A (en) * | 2012-12-18 | 2013-04-10 | 重庆川仪分析仪器有限公司 | Method and device for analyzing concentration of gas in containment and gas analysis instrument |
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| CN102788815A (en) * | 2012-08-24 | 2012-11-21 | 中煤科工集团重庆研究院 | Exploding tank used for ultralow temperature gas explosion characteristic test |
| CN102809519A (en) * | 2012-09-02 | 2012-12-05 | 王利兵 | Gas chemical instability intelligent test device |
| CN102937603B (en) * | 2012-10-19 | 2016-04-06 | 中国石油化工股份有限公司 | High Temperature High Pressure explosion limits tester, measures method and the application of explosion limits |
| CN102937603A (en) * | 2012-10-19 | 2013-02-20 | 中国石油化工股份有限公司 | High-temperature high-pressure explosion limit tester, method for determining explosion limit, and application thereof |
| CN102937604A (en) * | 2012-10-23 | 2013-02-20 | 中国石油化工股份有限公司 | Explosion limit determining device and determining method |
| CN103033441A (en) * | 2012-12-18 | 2013-04-10 | 重庆川仪分析仪器有限公司 | Method and device for analyzing concentration of gas in containment and gas analysis instrument |
| CN103033441B (en) * | 2012-12-18 | 2016-01-13 | 重庆川仪分析仪器有限公司 | Gas concentration analytical approach, device and gas analyzer in containment |
| CN103983532A (en) * | 2013-02-07 | 2014-08-13 | 上海微电子装备有限公司 | Device and method for testing outgassing rate of material |
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| 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 |
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| CN105092642A (en) * | 2015-08-13 | 2015-11-25 | 国家安全生产监督管理总局化学品登记中心 | Method for testing explosion limit of liquid mixture |
| CN105372404A (en) * | 2015-11-03 | 2016-03-02 | 中煤科工集团重庆研究院有限公司 | Low-temperature gas explosion characteristic test method |
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| CN111397768A (en) * | 2020-03-23 | 2020-07-10 | 西安交通大学 | Multi-channel ms-level dynamic pressure and quick response temperature calibration system and method |
| CN115508412A (en) * | 2022-09-06 | 2022-12-23 | 中国辐射防护研究院 | Combustible gas and water vapor mixture explosion experimental device and method |
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