Experimental Installation for the Investigation of the Influence of the Methods of Feeding on the Relative Humidity of Capillary-Porous Materials with the Built-In Software

摘要

The article deals with the peculiarities of management of the processes of hydrothermal treatment (humidification, drying, wet-heat treatment) of capillary-porous materials, including crops under conditions of low pressure (vacuum). In traditional technologies, only one of the above-mentioned processes is provided in specialized installations, during which the temperature or pressure [1,2] are controlled separately, if the process takes place in a sealed chamber., and these parameters are controlled., first of all., based on the requirements of safe operation of the installations. In the considered experimental setup it is possible to perform in parallel-sequential processes of humidification, drying., wet-heat treatment under reduced pressure (vacuum) [3,4]. In this set-up with integrated program management monitored and regulated not the individual parameters - temperature and pressure, and their interrelation, which characterize the condition of the working environment of steam under reduced pressure. The temperature sensors T and pressure P are connected to the computer, where their readings are compared with the program [5], which reflects the dependence P=f(T) for the state of the working environment of each process [6]. In the event of misalignment parameters (pressure and temperature) that characterize the condition of the working medium in the chamber, a signal is supplied to the solenoid valve control, which, actuating, ensures the flow of portions of water in the steam generator, located at the bottom of the working chamber, before the onset of harmonization between the indicators of T and P. When drying., the temperature rise is ahead of the pressure increase and the water portion is not required., so the temperature level of the resulting dry steam is maintained.