SYSTEMS AND TECHNIQUES OF THE PNEUMATIC ASH REMOVAL ON THE TPPs

Abstract

In the European Union, the USA and other developed countries of the world the ashes of power plants are considered as technogenic raw materials for many industries, which are utilized to 92 % in a dry form; their systems of pneumatic ash handling are an integral part of technological process of coal-fired TPPs. In Ukraine the systems of hydraulic ash removal are applied and, as a consequence, ashes lose the consumer worth concerning such use, and its accumulation in ash dumps leads to land allotment problems, pollution of soil, ponds, atmosphere, pollination of territories, and possibility of catastrophic aftereffects from breakthrough of protections dams, which solution is the disposal of ash in dry form. The article presents a comparative analysis of the known systems of pneumatic ash handling (on the density phase, nature of the transportation, method of creating a pressure difference in a pipeline),the recommendations are given on the choice of equipment and technologies, which have obtained the positive approbation in the world. Their use in the coal-fired TPPs of Ukraine will allow to the maximum dispose of the ash as a valuable product, to obtain a profit from sales, and to solve problems of environmental protection.