Exploitation Problems of Coal Pulverizers

Abstract

The article presents an overview of the literature concerning issues of exploitation of coal pilverizers. Coal mills are the basic sets which correct work depends largely on the quality of the combustion process in power plants. Many years of operating experience made currently available mills characterized by high reliability and efficiency. However, increasing requirements of crunching number quality, work flexibility and security, pose new challenges for designers. Ensuring optimal operation of mills requires solution of a number of operating problems, which include wear of grinding components, ensuring the proper fragmentation of dust and fire safety. An additional difficulty is the fact, that these devices due to the nature of their work, in each case must be treated individually. This means that solution of a problem into one device, do not always take the same effect into another. Article presents the most important technologies of pulverizers in polish energy. Also describes the most important problems faced by service staff and how to prevent them.

The Disturbance Detection in the Outlet Temperature of a Coal Dust–Air Mixture on the Basis of the Statistical Model

“…The resulting dust-air mixture is directed to the separators that do not let too large coal fractions in. Next, it is fed through the dust channels to the burners placed on the wall of the boiler's combustion chamber [2,19].…”

“…In turn, too much or too little primary air may potentially result in unnecessary heating or unburned fuel, respectively. In order to optimize the combustion process, it is necessary to optimize the mill's control system which must control the ratio of the primary air flow to coal dust flow, thus keeping the coal mill efficient [1,2].…”