Microwaves - measuring device for the determination of the charging of a two-phase flow

摘要

The invention relates to a microwave - measuring device for the determination of the charging of a two-phase flow with a gaseous carrier medium with small and smallest solid - and / or liquid particles as well as for determining the gas contained in a liquid flow, preferably by means of a waveguide - fundamental wave. A preferred field of application of the invention, the determination of the loading of a gas stream with solid particles in large-volume pneumatic solid substance transport systems, as described, for example, in the case of coal dust furnace installations are used in coal fired power plants. Dollars a microwave - measuring device according to the invention is characterized in that, before and after one of a transmitter - and a receiving antenna for microwave measuring section formed in the interior of the feed line extending field rods are arranged, which are in operative connection with the conductive material of the existing delivery line as a resonator for by the transmitting antenna in the supply line is coupled-in microwaves act. The result is achieved that, due to diffraction, superimposition and / or reflection outside of the measuring section in its plane of polarization and / or phase with respect to the changed microwaves microwaves coupled largely are short-circuited and thus an impairment of the measurement results is avoided. Dollars a of the particular advantage of the solution according to the invention exists in a simple structure of the measuring device and its easy installation even in ..