Heating and Cooling Systems with a Working Temperature Range up to 550°C Offered

Lauda is now offering temperature control systems that function using liquid salt. The advantages: unique working temperature range up to 550°C and high operational safety for seamless production processes.

After successful test runs and customer approval in-house at Lauda, the first high-temperature system to use molten salt as a heat carrier was loaded for transport to the customer's facilities. Lauda has been designing specialised Heating and cooling systems for the chemical and pharmaceutical industries for over 50 years. They provide precise temperature control thermostating for reaction vessels, evaporators, dryers and filters using heat transfer liquids – primarily thermal oil. If extremely high temperatures are required, such as in aluminium oxide or melamine production, lye evaporation, and other high-temperature reactions, molten salt offers some real advantages as a heat carrier compared to thermal oils, which are limited to an operating temperature of around 400°C. In comparison, the salt mixture used by Lauda permits temperatures up to 550°C. They are liquid under operating conditions, have ideal use characteristics, such as low viscosity and high heat capacity, and ensure non-pressurised operation.

The principle of operation: a pump conveys the liquid salt mixture from a heated bottom tank to a heater (either a combustion heater or an electric heater) that heats it to the desired temperature. If necessary, a cooling module can be integrated that will cool the salt mixture down to a temperature just above its solidification point, precisely and to the correct degree. This makes it possible to realise a constant temperature system with a unique working temperature range. When the pump is turned off, the salt mixture automatically drains back into the tank. This prevents solidification in the system and ensures high operational safety.

All Lauda systems are delivered to the customer as modules, ready to be connected and with a controller included. Extensive tests in the Lauda testing facility make starting up on-site a quick process, thus reducing standstill times during installation.