Regenerative and integrative hydrogen sulfide liquid phase oxidation absorption method of sulphur separation/desulfuration solution

Abstract

The invention relates to a regenerative and integrative hydrogen sulfide liquid phase oxidation absorption method of sulphur separation / desulfuration solution, comprising a regeneration-separation tower composed of a bubbling reaction section, an air liquid separation section and a foam collection section. Desulfuration solution used for absorbing H2S flows out of a self-absorption tower and enters into the regeneration-separation tower, and then is oxidized and regenerated by a catalyst at the bubbling reaction section so as to enrich sulphur granules on a bubble interface; at the air liquidseparation section, the regeneration / desulfuration solution is separated from foams and is returned to an absorption tower for recycling, and sulphur is carried to the foam collection section by foams and is recovered by collecting foams; 0.008-0.012g of surfactant is added when per desulfuration solution containing 1g of sulphur enters into the tower; air dose introduced in the desulfuration solution containing 1g of sulphur is no less than 34L, and empty tower gas velocity is 0.8-2.5cm / s; and the sulphur granule separation rate and regenerative reaction rate are high, the energy consumptionand catalyst consumption are low, and the method can be applicable to the process of absorbing H2S gas in medium-size sulphur throughputs.

Description

technical field [0001] The invention relates to a sulfur separation / desulfurization solution regeneration integrated hydrogen sulfide absorption method for complex iron liquid phase oxidation and absorption of hydrogen sulfide gas. Background technique [0002] Hydrogen sulfide gas is one of the main gases that affect product quality and cause environmental pollution in natural gas, oil refining and chemical industry. H in natural gas and refinery gas with medium latent sulfur content (100kg / d to 30t / d elemental sulfur) 2 Among the S absorption processes, the complex iron liquid-phase oxidation absorption process has the advantages of fast absorption speed, high desulfurization efficiency, less side reactions, low cost, and environmental friendliness, and has the most industrial application value. The process uses trivalent complex iron ions as a catalyst to convert the H dissolved in the desulfurization solution 2 S is oxidized to elemental sulfur, and the catalyst is red...

AI Technical Summary

Problems solved by technology

In the prior art, the sedimentation ratio of sulfur is increased by adding methods such as dispersing and flocculants, so that the sulfur settles at the bottom of the regeneration reactor or the inner circulation bubble tower, and then the sedimentation liquid is discharged, and then the sulfur is separated by methods such as filtration. The sulfur content in the sedimentation liquid is low, so that a large amount of solution is circulated between the filter unit and the reactor, which not only increases the energy consumption and the loss of desulfurization agent, but also the separation effect is still not ideal

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