Nitrogen trichloride discharge

In accordance with relevant laws and regulations such as the Environmental Protection Law of the People’s Republic of China and the Law on the Prevention and Control of Air Pollution, any enterprise or individual engaged in production and business activities must meet environmental protection requirements, including effective control over the discharge of wastewater, waste gas, and solid waste. Specifically regarding the issue of wastewater discharge from liquid chlorine vaporizers, if the wastewater discharged from the gas-liquid separator of the liquefaction unit and the liquid chlorine storage tank contains hazardous substances such as nitrogen trichloride, it is necessary to carry out appropriate treatment and disposal in accordance with relevant regulations. Furthermore, whether the wastewater from the gas-liquid separator of the liquefaction unit and the liquid chlorine storage tank needs to be treated depends on the specific regulations set by the local environmental protection authorities. Therefore, when performing maintenance on the liquid chlorine vaporizer, it is necessary to comply with **and local environmental protection regulations in order to protect the environment and the public interest. .

As long as there is a possibility of nitrogen trichloride accumulating, it is necessary to discharge it, for safety reasons.

As long as liquid chlorine remains in flow within the equipment and no dead zones form, nitric trichloride will not accumulate, and there is no need for waste discharge. Current regulations require waste discharge from \"liquid chlorine vaporizers\" and \"chlorine buffer tanks\"; other equipment that may experience accumulation of nitrogen trichloride also must have waste discharged.

According to the \"General Technical Requirements for Safety Facilities in Chlorine Production from Chlor-alkali Processes\" T/CCASC1003-2021, the floor of the liquid chlorine storage tank building should have a certain slope; a liquid chlorine collection tank should be installed in the lowest areas of the floor, or such a tank can also be set up using partition walls (or an alkali solution neutralization tank). Treatment facilities equipped with liquid chlorine discharge should not be fitted with liquid chlorine evaporation and recovery systems that could lead to the accumulation of nitrogen trichloride. So currently, at the site, liquid chlorine is continuously discharged into the waste tank where it is vaporized and absorbed; this is part of a liquid chlorine evaporation and recovery system. According to these instructions, should we remove this liquid chlorine discharge vaporization and recovery device and replace it with an alkaline absorption and neutralization tank? Also, can the liquid chlorine storage tanks and liquefiers be operated without requiring sewage discharge?