Device for the recovery and diffluence of sulfur dioxide and the system and method thereof

The invention discloses a sulfur recovery equipment by sulfur dioxide recovery divided flow method and the sulfur recovery method. The acid material gas is divided into two channels. One channel is sent into the claus catalytic reactor with the sulfur dioxide from the sulfur dioxide recovery cell together to carry the catalytic conversion reaction out and the obtained tail gas is sent into the incinerator with the other channel together to burn in peroxy. All compounds with sulfur are translated into the sulfur dioxide to be sent into the sulfur dioxide recovery cell to carry sulfur dioxide recovery out so that after the sulfur dioxide in gas is coincidence with the discharge standard it is discharged in air and obtained sulfur dioxide is returned to the claus reactor again. It is provided with simple structure, low cost, on treatment for tail gas, simplified reaction process. Decreased invest, shrinkage cubage, little catalyzer dosage, no high-temperature heating reacting segment, no material acid air washing pretreatment process and no hydrolyzing catalyzer. It can treat poor H2S acid gas and solve environmental pollution. It can enlarge the sulfur recovery and the recovery invest can not be enlarged.