The flowing and heat transfer in the primary surface recuperator (PSR) can be influenced by unreasonable inlet structure which results in uneven material flow distribution.

The inlet structure and the level of machining accuracy is one of the key factors which decide the separation and using performance of the liquid-liquid separation hydrocyclone.

The normal inlet structure of a cyclone was improved to be a new inlet structure with various rotating channels and angles, and a cold test was measured for the performance of the cyclones.