Sušení velmi vlhkých látek s následným využitím odpadního tepla

Abstract

Currently, the focus is on the efficient use of energy resources, not only resources that nature gives us, but also the resources that arise manufacture of various products. These sources are meant waste. Most of these resources are necessary, however, before the actual energy use, modify. This thesis deals with the management of very high humidity greater than 80% wt., And drying in the humidity at which you can no longer use the waste energy, such as burn. Among such materials include brewer's spent grain, stillage, sludge from wastewater treatment plants or sugar beet pulp. The aim was to find a method for drying, which will be more efficient and economical than conventional drying methods. The method of drying to be effective and economically feasible, it is necessary to incoming thermal energy can be used not only for primary drying, but also re-use of waste heat. Dissertation focuses on the design fluidized drying with subsequent use of waste heat. It was designed and tested in a laboratory model, "cold", on which the simulated behavior of the material in fluidized beds. The results were optimistic and based on the measurement of laboratory model was constructed a working prototype for drying spent grains and sludge from wastewater treatment plants, where it has been used thermal energy to dry the material. We also made use of waste heat in such a way that the fluid medium is slightly superheated steam, which is due to the further evaporation of moisture from the dried material. In fluidized oven created a slight overpressure, which pushes the excess steam to the condenser where evaporated moisture condenses and transmit heat as a heating system. In the event that it is possible to use waste heat arising during drying, this method becomes very efficient drying, because it can be used up to 96% embedded thermal energy.