Cation bed hydrochloric acid two-step soaking regeneration process

The invention discloses a cation bed hydrochloric acid two-step soaking regeneration process, and belongs to the field of regeneration processes of water treatment equipment. According to the process, in the first step, hydrochloric acid with a concentration of 3.0-4.0% is fed for 20-30 minutes, then an acid inlet valve and a discharge door are closed, and soaking is performed for 10 minutes, so that harmful substances on the surface of a resin are fully washed away; and in the second step, the acid inlet valve and the discharge door are opened, the failed cation resin is regenerated by feeding hydrochloric acid with a concentration of 1.8-2.5% for 15-25 minutes, so that the hydrochloric acid fully participates in the ion exchange reaction, and the exchange capacity of the hydrochloric acid is recovered, wherein the cation bed is replaced for 40-60 minutes and washed for 10-20 minutes, residual hydrochloric acid in the cation bed is removed, and the effluent is qualified for later use. The process is simple i