Device and method for collecting toxic gas in high-temperature decomposition of materials

A high-temperature decomposition and flue gas collection technology, which is applied in sampling devices, preparation of test samples, etc., can solve the problems of easy failure in the test process, incomplete gas absorption, and explosion of the combustion cylinder, and achieves simple structure, low cost, and avoidance of The effect of backflow

Active Publication Date: 2018-12-14
ZHUZHOU TIMES NEW MATERIALS TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, a simple schematic diagram of this method has been given in the French standard NFX70-100-2-2006, but it cannot be operated only by referring to the standard. The inhalation of the combustion cylinder causes the combustion cylinder to burst, etc.

Method used

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  • Device and method for collecting toxic gas in high-temperature decomposition of materials
  • Device and method for collecting toxic gas in high-temperature decomposition of materials

Examples

Experimental program
Comparison scheme
Effect test

experiment example 1

[0066] Preparation before the experiment: Take 1g of rubber sample, cut it into pieces below 1mm³, place the sample in the sample boat, put on the sample inlet epitaxial tube, fix it with a connecting ferrule, and connect all the flow paths with Teflon tubes; conventional gas Two absorption bottles are connected in series, and 700ml of 1mol / L NaOH absorption solution is added to the two gas absorption bottles; the drying tube is filled with anhydrous calcium chloride; the temperature of the tubular cracking furnace is raised to 600°C; the gas The flow path provides carrier gas, and the pressure is first adjusted to 0.1MPa.

[0067] Test process: The sample boat with the sample is pushed into the center of the quartz combustion cylinder through the sample push magnetic block; the pyrolysis toxic flue gas passes through the anti-suckback buffer bottle and the gas absorption bottle with the carrier gas, and the absorption liquid in the gas absorption bottle absorbs HCN , SO2, HCl...

experiment example 2

[0069] Preparation before the experiment: Take 1g of rubber sample, cut it into pieces below 1mm³, put the sample in the sample boat; connect all the flow paths with polytetrafluoroethylene tubes; 490ml 0.1mol / L NaOH and 10mlH 2 o 2 The composed absorption solution; the drying tube is filled with silica gel desiccant; the temperature of the tubular cracking furnace is raised to 600°C.

[0070] Test process: The air generator is purified and connected to the sample flow path from the other inlet of the double-port ball inlet joint; the sample boat with the sample is directly pushed into the quartz with a stainless steel bracket from one inlet of the double-port ball inlet joint. Immediately block the entrance with a plug after entering the combustion tube; the pyrolysis toxic flue gas passes through the anti-suckback buffer bottle and gas absorption bottle with the carrier gas, and the absorption liquid in the gas absorption bottle absorbs HCN, SO 2 , HCl, HF, HBr and other g...

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Abstract

The invention discloses a device and a method for collecting toxic gas in high-temperature decomposition of materials. The device comprises a tubular cracking furnace and a sample boat, and further comprises a double-hole ball head inlet connector, a quartz combustion cylinder, a double-hole ball head outlet connector, an anti-inverse-suction buffer bottle, a gas absorption bottle, a drying tube,a dust filter, a needle valve, a flow meter and a gas storage bag, wherein the quartz combustion cylinder is located in the tubular cracking furnace. After being put into the sample boat, a sample ispushed to the high-temperature quartz combustion cylinder for combustion through a sample pushing magnetic block; after a part of the generated toxic gas is absorbed by an absorption liquid, the restof the toxic gas is dried and subjected to dust filtration; and the filtered toxic gas is collected in the gas storage bag. By the adoption of the device and the method, under the condition that gas flow of carrier gas is not interrupted, the sample can be rapidly and accurately fed; the test failure caused by the fact that a gas path is opened by impulsion at the moment of combustion can be avoided; the device is simple in structure, high in universality, short in analysis time, low in cost and convenient to operate; and the toxic gas can be better subjected to accurate qualitative and quantitative analysis.

Description

technical field [0001] The invention relates to the technical field of gas collection, in particular to the technology of collecting toxic smoke from pyrolysis of materials. Background technique [0002] With people's increasing requirements for comfort and aesthetics, a large number of flammable decoration materials are used in the construction and transportation fields. However, when a fire breaks out, a large amount of toxic fumes produced by the combustion of these flammable materials will cause the trapped people in the fire house site to coma and suffocate after inhaling these toxic fumes, and even be unable to escape and die in the sea of ​​flames. Therefore, it is particularly important to test and evaluate the toxic fumes produced during the combustion and decomposition of materials. Toxic fumes mainly include: carbon dioxide, carbon monoxide, hydrogen cyanide, hydrogen fluoride, hydrogen chloride, hydrogen bromide, nitrogen oxides, sulfur dioxide, etc. [0003] At...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/24G01N1/34G01N1/44
CPCG01N1/24G01N1/34G01N1/44
Inventor 谭帅霞于晓辉刘国钧王进刘思锐
Owner ZHUZHOU TIMES NEW MATERIALS TECH
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