Method of testing burning explosion characteristics of combustible gas at high temperature

A characteristic testing and gas technology, applied in the direction of material explosiveness, can solve the problems of inability to accurately determine combustion and explosion, inability to effectively determine whether the oxidation or decomposition reaction of combustible gas and oxygen has occurred, and achieve good technical effects.

Inactive Publication Date: 2018-01-30
CHINA PETROLEUM & CHEM CORP +1
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  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is that in the prior art, it is impossible to effectively judge whether the oxidation or decomposition reaction of combustible gas and oxygen has occurred, and it is impossible to accurately judge whether combustion and explosion have occurred. Test method for combustion and explosion characteristics

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  • Method of testing burning explosion characteristics of combustible gas at high temperature

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Embodiment 1

[0018] A test method for the combustion and explosion characteristics of combustible gases under high temperature conditions, such as figure 1 As shown, the explosion limit test device for tubular, kettle or spherical reactors includes the following steps: (1) firstly, according to the temperature and pressure of the test system, the reactor is heated to the target temperature; (2) using Vacuumize the reactor with the vacuum pump until the reading of the connected vacuum gauge is stable; (3) Inject the sample into the reaction system, or use the partial pressure method to feed the gas into the reactor through the gas distribution system according to the composition of the measured gas. Oxygen, then inert gas, and finally combustible gas; (4) Stir the mixed gas in the reactor for 2-5 minutes to make it fully mixed; (5) Perform chromatography-mass spectrometry analysis on the mixed gas to determine the Whether the mixed gas has reacted; (6) ignite the mixed gas, collect and reco...

Embodiment 2

[0026] According to the conditions and steps described in Example 1, the reaction system in this experimental test uses a tubular reactor, uses heating tiles to heat the tube body, uses a gas chromatography-mass spectrometer to analyze the composition, and uses an image and light intensity acquisition card to monitor the flame. Real-time recording, using temperature and pressure sensors to collect temperature and pressure data. Experimental testing methods and steps are as follows:

[0027] First, air purge the entire test system and check the air tightness. After confirming that there is no air leakage, heat the reaction tube to 400°C;

[0028] Vacuum the reaction system until the reading on the vacuum gauge is -99.4KPa and does not change. First, a certain amount of oxygen is introduced into the reaction tube until the reading on the vacuum gauge is -81.5KPa, and then a certain amount of nitrogen is introduced until the reading on the vacuum gauge is -8.6KPa. , and finally ...

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Abstract

The invention relates to a method of testing burning explosion characteristics of combustible gas at high temperature and mainly solves the problems of the prior art that whether combustible gas and oxygen experience oxidative or decomposition reaction cannot be effectively judged and that whether burning explosion occurs cannot be accurately judged. The method provided herein is characterized inthat if sampling analysis for mixed gas at high temperature shows that oxidation or decomposition products are produced, it is indicated that the oxygen and combustible gas in the mixed gas at this temperature are completely consumed, it is possible that no burning explosion occurs after ignition, a measured explosion extreme value is inaccurate even if burning explosion occurs, and reducing the initial temperature to re-perform the experiment is required; if sampling analysis for the mixed gas at high temperature shows that the composition has not changed, it is required to perform igniting and to judge whether burning explosion occurs via an image and light intensity acquisition system. By using the method according to the technical scheme, defects of existing test methods are well overcome; the method is applicable to the test on burning explosion characteristics of combustible gas at high temperature.

Description

technical field [0001] The invention relates to a method for testing the combustion and explosion characteristics of combustible gas under high temperature conditions. Background technique [0002] The chemical production process often involves flammable and explosive gas mixtures, which are prone to fire, explosion and other accidents with serious consequences. In the process design and production operation, the combustion and explosion characteristic parameters of combustible gas, such as explosion limit, limit oxygen content, auto-ignition point and minimum ignition energy, etc., must be specified. These parameters are necessary for engineering design, setting alarm interlock value and formulating safety control plan of. Therefore, appropriate methods should be adopted in process safety research to accurately obtain the combustion and explosion characteristic parameters of combustible gases. [0003] Foreign standards such as ASTM E681-04, EC440-2008, etc., as well as d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N25/54
Inventor 刘静如王振刚张帆徐伟石宁
Owner CHINA PETROLEUM & CHEM CORP
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