Nitrogen trichloride discharging device of liquid chlorine storage tank

The utility model relates to the field of chlorine liquefaction in chlor-alkali chemical industry, and discloses a nitrogen trichloride discharging device of a liquid chlorine storage tank, which comprises a through pipe body and a pollution discharge treatment tank, the liquid outlet end of the pipe body is fixedly communicated with the pollution discharge treatment tank, and a pressure transmitter and a self-control regulating valve are sequentially arranged on the pipe body. A detection probe of the pressure transmitter is positioned in a pollution discharge treatment tank for storing nitrogen trichloride, and the self-control regulating valve is used for controlling the nitrogen trichloride to flow in the pipe body. Compared with the prior art, the pressure transmitter can detect the pressure condition in the pollution discharge treatment tank, so that if the pressure transmitter detects that the pressure in the pollution discharge treatment tank exceeds a threshold value, the regulating valve is automati