Dilution device for hydrochloric acid

The utility model relates to a dilution device for hydrochloric acid, which comprises a drinking water tank and a hydrochloric acid solution tank, wherein the drinking water tank and the hydrochloric acid solution tank are respectively communicated with a first mixing tank through a pipeline. Liquid outlets of the drinking water tank and the hydrochloric acid solution tank are respectively provided with a flow control valve. A probe head is arranged in the first mixing tank, and is connected with a pH value on-line controller. The liquid outlets of the drinking water tank and the hydrochloric acid solution tank of the dilution device for hydrochloric acid are provided with the flow control valves, the probe head is arranged in the mixing tank and is connected with the pH value on-line controller, the flow control valve of the drinking water tank or the hydrochloric acid solution tank is adjusted through the measured pH value and thus the pH value of the hydrochloric acid diluent can be accurately controlled. The utility model is suitable for the large-scale production.