Abstract: In uranium enrichment plant, HF gas is absorbed by adsorbent material instead of condensation collection. The recovery unit uses NaF absorption attached tower. The reuse system of HF gas recovery unit is mainly to desorb the absorption-saturated NaF adsorption tower and adsorb it inside the tower HF gas is released by heating, and HF gas is sprayed and reused by adsorption tower. A set of HF gas process system is designed based on the test results. From the process flow, process parameters, process equipment, process method, process control and other aspects of the demonstration, a set of desorption process is designed to meet the requirements of the system. The process system has reached mature process standards in terms of production scale, safety and automation. In this paper, the operation of HF gas recovery device recycling system was studied and summarized, and the system equipment, process pipeline, centralized transmission and DCS control, computer workstation and other process design were carried out. The system fault interlocking protection part is designed, and the system innovation and difficulties are analyzed and summarized.

Key words: HF gas recovery unit, NaF adsorption tower, reuse, process design