Method for treating sulphur-containing exhaust gases and device thereof

A method for treating a sulfur-containing exhaust gas, comprising the following steps:

• step i):
• introducing a mixture of steam, the sulfur-containing gas, air, and a hydrocarbon fuel into an online heating furnace, and controlling a reaction between air and the hydrocarbon fuel therein to obtain a procedure gas stream containing a sulfur-containing substance, hydrogen, and carbon oxides, wherein the procedure gas stream is heated by heat released in a reaction between air and the hydrocarbon fuel, wherein the sulfur-containing exhaust gas is a Claus tail gas released from a tail gas purification unit, an exhaust gas from degassing of a liquid sulfur by bubbling air through the liquid sulfur, or a mixture thereof;
• step ii):
• controlling a hydrogenation reaction between hydrogen contained in the procedure gas stream and the sulfur-containing substance to obtain a hydrogenated tail gas containing hydrogen sulfide;
• and
• step iii) absorbing hydrogen sulfide contained in the hydrogenated tail gases with an absorbing agent to obtain a purified tail gas and an absorbing agent rich in hydrogen sulfide.