INSTALLATION FOR DETERMINING HAZARD INDICATORS OF INITIATED AUTOIGNITION OF SOLID DISPERSED SUBSTANCES AND MATERIALS Russian patent published in 2017 - IPC G01N25/50 G01N25/58 

FIELD: fire safety.

SUBSTANCE: installation is designed to determine the fire and transport hazard indicators of solid dispersed substances and materials prone to initiated self-heating/autoignition and release of flammable and/or toxic gases. It can be used in solving problems of transport safety, in primary and mining industries, where self-ignitable materials (cargoes) are present. At known installations, it is impossible to obtain information on the correlation between the amount of heating, the intensity and volume of gas emission with the concentration of the initiator in the dispersed material. The installation differs from the known inventions in the fact that it uses a multi-chamber thermostat, into the cylindrical reaction chambers of which samples of the test material with different concentration of the self-ignition initiator are placed, the control and measuring automatic chamber thermostatic system ensures that the experiment is performed at a given temperature, the heat losses of the self-heating mass are compensated through the chamber walls and the heating value is measured. In this case, the gas composition in the layer of dispersed material and in the free space of each chamber are monitored. One of the chambers is a control one and is designed for material sample with an initial (safe) concentration of the initiator. All chambers are provided with diametrically located fittings for sampling their atmosphere along the thermally insulated lines containing the trap filter to determine the gas composition by the gas analyser and return it to the chamber by a microcompressor.

EFFECT: ensuring the development of safe technologies for the production, storage and transportation of materials prone to autoignition and their classification as dangerous cargoes.

4 cl, 4 dwg