Device and method for removing organic sulfur in yellow phosphorous tail gas

The invention relates to the technical field of tail gas treatment and provides a device for removing organic sulfur in yellow phosphorous tail gas. The device comprises an oil washing tower, a regenerating tower and a lean oil storage tank, the oil washing tower is provided with a tail gas inlet, a lean oil inlet, a tail gas outlet and a rich oil outlet, the regenerating tower is provided with a rich oil inlet, a lean oil outlet and an organic sulfur outlet, the lean oil inlet is communicated with the lean oil storage tank, the rich oil outlet is communicated with the rich oil inlet, and the lean oil outlet is communicated with the lean oil storage tank. The device is simple in structure, low in cost and high in removing rate. The invention further provides a method for removing the organic sulfur in the yellow phosphorous tail gas. The method includes: A, utilizing heavy aromatic solvent to absorb the organic sulfur in the yellow phosphorous tail gas to obtain yellow phosphorous tail gas a and a mixed solution b; B, flash-separating the organic sulfur in the mixed solution B to obtain organic sulfur and heavy aromatic solvent; C, using the heavy aromatic solvent, obtained in step B, in step A; D, repeating step B and step C. By the method, the heavy aromatic solvent is utilized repeatedly, so that cost is lowered; only physical property of the organic sulfur is utilized, so that generation of new impurities is avoided.