Pneumatic transport

Operating principle and use

"Dilute phase" pneumatic conveying allows the handling of powdery and granular products over a varying distance using low pressure compressed air (< 1 bar). The product is transported continuously. The product is introduced into the pipe (circuit) by an airlock rotary valve via an injector element or directly (airlock transverse valve). Compressed air is produced by a Blower. There are two principles of dilute phase pneumatic transport: Positive pressure system (blowing); Negative pressure system (suction) The choice between these two principles depends on the physical characteristics of the products and the desired flow rates.

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Mechanical vapour Pressure

Operating principle and use

The operation of Vacuum evaporators by mechanical vapour Pressure is based on the recovery of the heat from the condensation of the distillate as a heat source. In these systems the process starts with the supply of external energy to the evaporator in order to start the evaporation process. Vacuum application reduces the boiling temperature of the liquid, thus improving the energy efficiency of the process. The steam that is produced, when extracted, is compressed by a positive displacement Blower, with the intention of increasing its temperature.

This increased heat returns to the evaporator as a heating medium. Once the cycle has started, there is no need to continue the external heat supply, because with the mechanical Pressure of the vapour, the heat produced is sufficient to maintain the liquid evaporation. The compressed and therefore superheated steam, when it passes through the evaporator exchanger, serves a double purpose: first it heats the liquid to be evaporated and then it condenses, saving the use of a refrigerant.

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• Water treatment
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• ...