What is the difference between the active light-ends removal systems NALD250 and NALD250i?

Technically seen, the design of the two products is quite similar. These two solutions distinguish by the partial return flow of light-ends gases in the NALD250i. By additional returning of low-boiling gases in the distillation circuit of the system, the system becomes a pure turbo-remover. For this reason, compared to the normal NALD250, the light ends removal can run faster for up to 5x depending on the individual parameters, e.g. temperature, type of oil, and system size.

Due to this extremely efficient working principle the NALD 250i is further ideally suitable for the rotating operation of multiple separated thermal oil systems up to 400,000 litres of total volume.

Scheme of the partial return flow

What do I have to consider in the place of installation of the NALD250 / NALD250i? Which conditions must be met?

Principally, the light ends removal system should be installed in a well-ventilated area. The exhaust duct must safely lead into the open air and the deflagration flame arrester that comes with the system must be installed at the end. The area around this opening must be free from ignition sources.
The system is also suitable for outdoor installation. However, it should be roofed to protect it from weather, e.g. by a penthouse roof, to protect the components and the electronic circuits.

It should be connected to the flow line of the thermal oil system. The return flow in the thermal oil system can be led as desired.
With this, pay special attention to the following interface parameters:

Connection valve – thermal oil (inlet and outlet)Nominal diameter DN40
Cooling water valvesNominal diameter DN20
Thermal oil – flow2 – 4 bar
Thermal oil – return flow0 – 3 bar (max. 4 bar)
Recommended inlet temperature250 °C
Control air4 – 6 bar (g)
Nitrogen supply> 3 bar min. 99.0% N2
Cooling water0,5 – 1 bar
Three-phase connectionappr. 5 kW