Water sealing drum is one of critical safety facilities for the sour water stripper. In operation,the short-cut of gas phase,flooding of sealing water,fouling and crystallization will occur because of defects of design and poor operation of the water sealing drum,which will lead to the function loss of sealing drum and failure of protection for the sour water tank. The problems in water sealing drum are analyzed in consideration of equipment construction and process,and effective measures are proposed. In t...