Device and method for testing combustion characteristics of material in low-pressure oxygen-enriched environment

A technology for combustion characteristics and testing devices, applied in measurement devices, chemical analysis using combustion, instruments, etc., can solve problems such as inability to accurately judge the risk of combustion products of materials, errors in flue gas measurement parameters, and complicated operations. Build, collect accurately, reduce impact

Pending Publication Date: 2021-10-29
CIVIL AVIATION FLIGHT UNIV OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The object of the present invention is to provide a device and method for testing the combustion characteristics of materials in a low-pressure oxygen-enriched environment in view of the above-mentioned shortcomings, which solves the problem in the prior art that the fire behavior in a high-altitude, low-pressure, and high-oxygen concentration environment has not been effectively and accurately tested. The problem of the research is solved at the same time. In the prior art, the experimental equipment such as the dynamic pressure variable temperature experimental cabin has a large space, the operation is complicated, and the flue gas measurement parameters will have errors. The problem of precise judgment

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  • Device and method for testing combustion characteristics of material in low-pressure oxygen-enriched environment

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Experimental program
Comparison scheme
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Embodiment 1

[0039] The invention provides a technical solution:

[0040] Please refer to Figure 1~2 As shown, a device for testing the combustion characteristics of materials in a low-pressure oxygen-enriched environment includes a low-pressure cabin 1, an ignition device 2, a weighing device 3, an oxygenation system 4, an exhaust system, a closed-loop pressure control system 5 and an online flue gas Detection and analysis system; the closed-loop pressure control system 5 is annularly set at the bottom of the low-pressure cabin 1, the closed-loop pressure control system 5 is connected to the oxygenation system 4, and the low-pressure cabin 1 is respectively connected to the closed-loop pressure control system 5 Connect with the exhaust system, carry out oxygen input to the low-pressure cabin body 1 through the closed-loop pressure control system 5, discharge the gas of the low-pressure cabin body 1 through the exhaust system, and ensure the constant pressure in the low-pressure cabin bod...

Embodiment 2

[0066] Based on the above-mentioned embodiment 1, this scheme provides a method for testing the combustion characteristics of materials in a low-pressure oxygen-enriched environment:

[0067] Step 1: drying the target material 76;

[0068] Step 2: Place the dried target material 76 in step 1 on the device with the function of measuring quality, and vacuumize the specified holding space, then fill it with oxygen, and turn on the exhaust function at the same time, so that the holding space The pressure in the space reaches the required steady state;

[0069] Step 3: use the ignition device to ignite the target material 76 in a closed manner in the carrying space, and measure the burning time of the target material 76;

[0070] Step 4: Record the change of the burning weight of the target material 76, and record the weight loss curve, calculate the loss rate of the burning mass of the material, detect the temperature of the flame flue gas at different heights, and monitor the ch...

Embodiment 3

[0074] Based on the above-mentioned embodiment 2, this solution provides a method for testing the combustion characteristics of materials in a low-pressure oxygen-enriched environment: specifically, a carton is used as the target material 76 for the experiment; the specific experimental steps are as follows:

[0075] Step 1: Before the experiment, prepare the sample carton, and then place the sample in a dry room for at least 24 hours to remove moisture;

[0076] Step 2: When starting the experiment, place the dried carton on the tray 75 on the balance, turn on the vacuum pump, evacuate the cabin, then adjust the oxygen concentration, adjust the pressure of the external oxygen cylinder to 0.25-0.4MPa, and turn on the instrument. The oxygen regulator control valve is adjusted to 0.2MPa, and the total flow rate is set to 10L / min;

[0077] Step 3: Adjust the pressure in the low-pressure chamber. When the pressure reaches a stable state, power on the KHGYD-24V portable DC plasma i...

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Abstract

The invention discloses a device and a method for testing combustion characteristics of a material in a low-pressure oxygen-enriched environment. The device comprises a low-pressure cabin body, an ignition device, a weighing device, an oxygenation system, an exhaust system, a closed-loop pressure control system and an online flue gas detection and analysis system, wherein the closed-loop pressure control system annularly sleeves the bottom of the low-pressure cabin body, the closed-loop pressure control system is connected with the oxygenation system, the low-pressure cabin body is respectively connected with the closed-loop pressure control system and the exhaust system, the weighing device is arranged in the low-pressure cabin body, an area above the weighing device is a reaction area, the ignition device extends into the internal reaction area from the outside of the low-pressure cabin body through an ignition rod, and the online flue gas detection and analysis system is connected with the low-pressure cabin body. By means of the device, the combustion characteristics of the material in the low-pressure oxygen-enriched environment can be efficiently and accurately experimented and analyzed, and pressure at different altitudes can be simulated.

Description

technical field [0001] The invention relates to the technical field of fire safety, in particular to a device and method for testing material combustion characteristics in a low-pressure oxygen-enriched environment. Background technique [0002] my country's high plateau (greater than 2438m) area has a permanent population of more than 13 million, and more than 60% of the world's high plateau airports are located in my country, and these airports have about 8 million air passenger flows every year. Oxygen-enrichment problems exist in high-altitude airport terminals, passenger and staff lounges, hotels and other places. Increasing indoor oxygen concentration can effectively solve the problem of oxygen deficiency in high-altitude areas, but excessive oxygen concentration in low-pressure environments will cause material fires. Behavior has changed, creating a potential fire hazard. [0003] The mass loss rate, smoke composition and smoke density are all important parameters to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N31/12G01D21/02
CPCG01N31/12G01D21/02
Inventor 贾旭宏马俊豪陈现涛孙强徐松涛
Owner CIVIL AVIATION FLIGHT UNIV OF CHINA
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