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Thermal decomposition device and test method for high-boiling-point clean extinguishing agent in air atmosphere

A fire extinguishing agent and thermal decomposition technology, which is applied in the thermal decomposition device field of high boiling point and low greenhouse effect clean chemical liquid fire extinguishing agent, can solve problems such as differences in thermal decomposition of fire extinguishing agents, incomplete vaporization of liquid fire extinguishing agents, etc., and achieve strong operability Effect

Pending Publication Date: 2019-02-01
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, most of the researches on the thermal decomposition of fire extinguishing agent directly pass the pure fire extinguishing agent into the heater at a certain temperature. There are certain differences in thermal decomposition in air
Domestic patents have not yet involved the thermal decomposition of fire extinguishing agents. Therefore, there is an urgent need for a thermal decomposition device and test method suitable for high boiling point and low greenhouse effect fire extinguishing agents in air atmosphere.

Method used

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  • Thermal decomposition device and test method for high-boiling-point clean extinguishing agent in air atmosphere
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  • Thermal decomposition device and test method for high-boiling-point clean extinguishing agent in air atmosphere

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Experimental program
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Effect test

Embodiment 1

[0048] like figure 1 As shown, a high boiling point clean fire extinguishing agent thermal decomposition device in air atmosphere, including: liquid fire extinguishing agent and glass container 1, peristaltic pump 2, heating belt and temperature controller 3 of heating belt, valve 1 4, gas flow meter 5. Vaporization chamber 6, valve 2 7, tube furnace 8, valve 3 9, ion hand sanitizer 10, gas drying device 11, and gas collection bag 12.

[0049] Open the inert gas cylinder valve in the device, i.e. valve two 7 and adjust the valve to feed inert gas to the tube furnace 8 at a certain flow rate, open the tube furnace 8 and set the pyrolysis temperature (the thermal decomposition temperature of perfluorohexanone is set to 300 Between 50°C and 850°C, set the temperature gradient according to 50°C or 100°C), keep the temperature in the constant temperature zone in the tube furnace for 1 to 3 hours, and then close the valve 27 of the inert gas cylinder. Next, turn on the heating belt...

Embodiment 2

[0051] In the present invention, the high-boiling clean fire extinguishing agent can be replaced with a liquid refrigerant. Formally hexafluorobutene (HFO-1336mzz(Z)) is a new type of halogenated hydrocarbon developed by DuPont Company of the United States. Due to its excellent thermodynamic properties, non-flammability, low toxicity, and environmental friendliness (ODP= 0, GWP=2), its boiling point is 33.4°C. Its physical and chemical properties are very similar to those of perfluorohexanone (Novce 1230). The thermal stability and pyrolysis products of liquid refrigerants can also be analyzed with the pyrolysis device of this patent.

[0052] Open the inert gas cylinder valve in the device, i.e. valve two 7 and adjust the valve to feed inert gas into the tube furnace 8 at a certain flow rate, open the tube furnace 8 and set the pyrolysis temperature (the thermal decomposition temperature of formal hexafluorobutene is set to Between 300°C and 800°C, set the temperature gradie...

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Abstract

The invention discloses a thermal decomposition device and a test method for a high-boiling-point clean extinguishing agent in an air atmosphere. A peristaltic pump and an air cylinder are used for quantitatively inputting a certain proportion of liquid extinguishing agent and air into a vaporization chamber, so that the liquid extinguishing agent is completely vaporized in the air atmosphere andis pyrolyzed at a certain thermal decomposition temperature, and finally collecting, analyzing and processing are carried out on the the pyrolysis products. The thermal decomposition device and the test method consider the thermal decomposition condition of the fire extinguishing agent in the air atmosphere for the first time, so that high operability, and safety and reliability are achieved, andtherefore the thermal decomposition device and the test method can be used for evaluating the pyrolysis toxicity of various novel high-boiling-point clean fire extinguishing agents and exploring the fire extinguishing mechanism of the fire extinguishing agent.

Description

technical field [0001] The invention relates to a thermal decomposition device and test method of a fire extinguishing agent in an air atmosphere, in particular to a thermal decomposition device and a test method of a clean chemical liquid fire extinguishing agent with a high boiling point and low greenhouse effect. Background technique [0002] After the halon fire extinguishing agent has been eliminated due to the destruction of the ozone layer and the harm to the ecological environment, the development and use of halon substitute fire extinguishing agents is one of the hotspots and priorities in the field of fire protection. [0003] Some domestic scholars have studied the high-temperature pyrolysis characteristics of some fluorine-containing fire extinguishing agents. The research group of Professor Pan Renming of Nanjing University of Science and Technology has studied the high-temperature thermal solution features. At present, most of the researches on the thermal dec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N30/02G01N30/96G01N30/06G01N1/44
CPCG01N1/44G01N30/02G01N30/06G01N30/96G01N2030/025G01N2030/062
Inventor 张和平陶能陆松刘长城郑荣
Owner UNIV OF SCI & TECH OF CHINA
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