METHOD FOR PURGING AND UNLOADING HYDROCHLORIC ACID GAS OF OXIDATION FURNACE

摘要

PURPOSE: A method for purging and unloading hydrochloric acid gas of an oxidation furnace is provided to be capable of preventing the corrosion generated at the oxidation furnace due to remaining hydrochloric acid gas by completely purging the hydrochloric acid gas using optimum condition of the flow rate of nitrogen gas and exhausting pressure. CONSTITUTION: When purging in a general oxidation furnace, the flow rate of nitrogen gas is in the range of 9-10 slm and exhausting pressure is in the range of 14-16 mmH20. When unloading in the general oxidation furnace, the flow rate of nitrogen gas is in the range of 18-20 slm and the exhausting pressure is in the range of 4-6 mmH20. When purging in an FTPS oxidation furnace, the flow rate of nitrogen gas is in the range of 9-11 slm and the exhausting pressure is in the range of 9-11 mmH20. When unloading in the FTPS oxidation furnace, the flow rate of nitrogen gas is in the 19-21 slm and the exhausting pressure is in the range of 4-6 mmH20.