Method and device for the extractive triboelectric measurements of dust and aerosols in streaming gases

摘要

A method and a device for the extractive triboelecric measurement of dust and aerosols is provided. A partial gas stream is removed from a main stream and drawn through a triboelecric measuring chamber with a variable or constant temperature, at a variable or constant speed and with an abradant rotational movement. Sensors are arranged in the measuring chamber in such a way that they are electrically insulated. The triboelecric effect begins when the gas stream that is loaded with dust particles and aerosols passes through the triboelecric measuring chamber, preferably in a cyclonic manner, moving rotationally, abradantly on the sensors. Since gaseous components cannot be measured according to the triboelecric measuring principal, the temperature is controlled intermittently at a low temperature producing a signal which is caused by dust and aerosols, and at a higher temperature, producing a signal which is caused by dust alone.