Осадження золових частинок на сферичні колектори у пристроях для мокрої очистки димових газів

• Дата: 2012
• Автор: Yatsenko V.P.
• Формат: Стаття
• Мова: Ukrainian
• Опубліковано: General Energy Institute of the National Academy of Sciences of Ukraine 2012
• Теми: мокра очистка димових газів; коефіцієнт осадження; колектори; краплі; частинки золи.
• Онлайн доступ: https://systemre.org/index.php/journal/article/view/448
• Назва журналу: System Research in Energy

The cleaning of the effluent gases of thermal power plants from ash particles is an important problem in the power engineering. For its solution, devices for scrubbing are widely used. The share of devices of such a type in Ukraine’s heat power industry constitutes about 40 %. Among their shortcomings, we mention a fairly low degree of the catching of particles, which does not enable one to meet the up-to-date ecological requirements. The efficiency of devices for scrubbing depends substantially on the features of the interaction of particles with collectors (drops or liquid films). The study of this phenomenon will be useful for the improvement of such devices.The collision efficiency is a fundamental characteristic of the interaction of a particle with a collector of any shape. The motion of ash particles to the collector surface and their interaction with it are caused mainly by the action of inertial, hydrodynamic, and electrostatic forces, as well as by the diffusion. The aim of this work is to deduce a formula for the collision efficiency within the inertial mechanism of motion of particles to the surface of a spherical collector.We have analyzed the available methods for the calculation of the inertial collision efficiency of particles on a spherical collector. We have shown that, for the modes of circumfluence of the collector, which are intermediate between the viscous and potential ones, the result of calculations of the collision efficiency by the Langmuir empiric formula does not coincide with the well-known data. Based on these data, we have obtained a relation that approximates well the collision efficiency for the intermediate modes of circumfluence. The use of this relation and the calculation of the degree of particle catching give values of the collision efficiency, which are closer to those registered in the practice of operation of the devices for scrubbing.