First, the characteristics of molten salts

Molten salt is a chemical reaction heat medium, which is melted by salts. It is also called heat conduction molten salt and heat medium. The ratio of molten salt is generally potassium nitrate 55% (GB1918-2011), sodium nitrite 45% (standard GB2367--2006).

Two, attention should be paid to the use of molten salt

1, molten salt is an oxidant, can not be linked to carbon, rosin or reducing substances and other organic substances, so as not to cause severe chemical reactions.

2, when heating up, strictly control the heating rate, avoid the system running hot, cold, hot.

3, in the cyclic heating, the flow rate constant, can not exceed the film temperature.

4, the use of high temperature, water and organic substances are prohibited.

5, molten salt use temperature shall not exceed 550 degrees. Over time, the molten salts begin to become unstable, react, emit gas, and increase the melting point of the mixture, resulting in the deterioration of the molten salts.

6, promote the use of molten salt and air separation (with nitrogen protection), can extend the service life.

7, when the melting point of molten salt rises or the molten salt appears more sediment, the molten salt should be reasonably replaced or replaced.

Three, molten salt improper use, prone to problems

Because of the improper use of molten salts, the most common problem is the melting point of molten salts. The melting point of molten salt is generally at 142-148 degrees centigrade. If the melting point is too high, it will cause problems such as pipe crystallization, blockage and leakage of equipment.