ОЦЕНКА ЭФФЕКТИВНОСТИ СЕПАРАТОРА С СООСНО РАСПОЛОЖЕННЫМИ ТРУБАМИ ПРИОБЕСПЫЛИВАНИИ ГАЗОВЫХ ВЫБРОСОВ ПРИ РАЗЛИЧНОМ УГЛЕ РАСКРЫТИЯ ПРЯМОУГОЛЬНЫХ ЩЕЛЕЙ

Abstract

An important task in dedusting gas emissions at chemical industry enterprises is to achieve high efficiency. A complex of devices is used for this. Large particles are removed from gases in coarse cleaning devices. Fine particles are removed from gases in fine cleaning devices. However, fine filters are quickly clogged, which leads to an increase in hydraulic resistance and, in some cases, to a decrease in efficiency. An urgent task is to increase their service life and increase efficiency. For this purpose, the paper proposes the design of a separator with coaxially arranged pipes, which is proposed to be installed in front of fine filters. The aim of this work is to numerically investigate the effect of the angle of opening of rectangular slits on the efficiency and hydraulic resistance of a separator with coaxially arranged pipes. The article presents the design of the separator. The principle of operation is described. During numerical calculations, the inlet velocity of the gas flow was set at the inlet of the device, which varied from 3 to 10 m/s, and the mass flow rate of particles was 5 g/s. The particle density varied from 1000 to 3000 kg/m3. The particle diameter varied from 1 to 15 microns. The opening angle of the slits varied from 16 to 24 °. During the calculations, the following main conclusions were made: the structure of vortices in the inter-tube space determines the degree of efficiency of a separator with coaxially arranged pipes, with the angle of opening of rectangular slits α = 20 °, the maximum separation efficiency of fine particles up to 10 microns in size from a dusty stream is equal to an average of 40.3%, the separation efficiency of fine particles from a dusty stream is achieved. the flow rate increases with an increase in the input gas velocity and particle density, because they are easier to dislodge from the swirling gas, the pressure loss in the separator with coaxially arranged pipes is no more than 626 Pa.