The present invention provides a low
sulfur emission sulphur
recovery process, which comprises a burning furnace, a first stage Claus reactor, a second stage Claus reactor, a selective hydrogenation reduction reactor, a selective oxidation reactor, and two adsorption desulfurization towers capable of being connected in a series parallel connection manner, wherein the burning furnace, the first stage Claus reactor and the second stage Claus reactor are sequentially connected in series. According to the present invention, with the appropriate selection of each catalyst, the appropriate selection of the desulfurization agent, and the accurate control of each step process condition, the total standard
sulfur in the process emission gas is that SO2 is less than or equal to 10 mg / m<3>; after the desulfurization agent penetrates, 250-300 DEG C
inert gas is used to perform in-situ thermal regeneration, the regeneration outlet gas returns to the burning furnace, the condenser after the burning furnace, the condenser after the first stage Claus reactor, the condenser after the second stage Claus reactor, the condenser after the selective hydrogenation reduction reactor, or the condenser after the selective oxidation reactor to recover elemental
sulfur, H2S, SO2 and other sulfides in the regeneration gas, and the total standard sulfur in the evacuation
tail gas during the desulfurization
tower regeneration process is that SO2 is less than or equal to 10 mg / m<3>; and the low sulfur emission sulphur
recovery process has advantages of low sulfur emission, long desulfurization agent operating, high desulfurization capacity, less replacement frequency, low cost and the like.