SYSTEM FOR THE FORCED EVAPORATION OF LIQUID WASTE BY MEANS OF LOW-PRESSURE DYNAMIC VIBRATION NEBULISATION USING A SOLAR STIRLING MOTOR AS A POWER SOURCE

摘要

The invention, represented in Figure 1, relates to a system for the forced evaporation of liquid waste, based on the nebulisation of the effluent to be evaporated inside a chamber (1) in which dry air and heat are applied. The system also includes a fan (2) which generates a forced flow of air, which hot air can come from the exterior or be obtained by means of heating inside the system using a heat exchanger or an electric heating resistor (3). In order to obtain microscopic drops and, consequently, a large contact surface in the air/liquid interface, instead of using evaporation meshes that become clogged and less efficient over time, the invention comprises the use of a set of dynamic vibration nebulisers (4) which operate at low pressure and which receive effluent after it has undergone undemanding filtering and been blown in. Inside the chamber, the air/liquid mixture undergoes a quasi-adiabatic process in which, by means of a sensible to latent heat exchange, the air is cooled and the liquid is evaporated in a highly efficient manner. The non-evaporated drops of liquid are collected in the lower part of the chamber (5). In order to prevent the emission of aerosols to the atmosphere, which can be dragged along by the forced flow of wet air, a drop separator (6) is used that is located at the outlet of the evaporation chamber. The conditions of the intake air are measured with a system of sensors (7), which can be used to alter the quantity of liquid to be circulated through the nebulisers and the speed of the fan in order to obtain maximum evaporation efficiency. A solar Stirling motor provides the necessary electricity and a fraction of heat to heat the intake air.