1 In order to prevent chlorine leakage in the electrolytic cell caused by power failure of chlorine compressor or Nessler pump, one of the following measures shall be taken: Chlorine trap Chlorine absorption device shall be set in the chlorine production system of to prevent chlorine from overflowing; It shall be equipped with chlorine compressor, outlet chlorine interlock valve or Nashi pump check valve; Chlorine eliminator shall be equipped with electrolytic DC power supply, chlorine compressor, outlet valve of Nessler pump, startup power supply of chlorine absorption device and other devices interlocked with power supply of chlorine compressor and Nessler pump.
2 The hydrogen content in the main pipe of chlorine gas collector is less than or equal to 0.4%. The hydrogen content of tail gas after chlorine liquefaction shall be ≤ 4.0%. Liquid chlorine filling pressure shall not exceed 1.1MPa. The filling volume of liquid chlorine in liquid chlorine storage tank, metering tank and vaporizer shall not exceed 80% of the container volume. After filling with liquid chlorine, measures shall be taken to prevent the pipeline from closing due to filling with liquid. The liquid chlorine in the chlorine trap shall not be filled into the liquid chlorine cylinder.
3 The chlorine trap, precooler, heat exchanger and other equipment shall be equipped with sewage (NCl3) devices and sewage treatment facilities, and the content of NCl3 shall be analyzed regularly. The content of NCl3 in sewage shall not be more than 60 g/L, otherwise, the discharge frequency and quantity shall be increased, and monitoring shall be strengthened.
