High-gravity oxygen-enriched oxidation regeneration method and special equipment for wet oxidation desulfurization process

Abstract

The invention discloses a super-gravity oxygen-enriched oxidation regeneration method by a wet oxidation desulfurization process. The method comprises the following steps: desulfurization rich liquid and oxygen-enriched air from an oxygen generator respectively enter a super-gravity machine for oxidation reaction in packing to regenerate a catalyst; a gas coming out of the super-gravity machine enters a gas-liquid separation tank, and is directly emptied or circulated to a front section of an oxygen generation system according to the oxygen concentration after mist trapping and water removal, and oxygen is enriched again; the oxidized and regenerated catalyst solution enters a pressure-stabilizing tank, wherein the pressure-stabilizing tank is communicated with the gas-liquid separation tank to stabilize the pressure of the super-gravity machine; the solution in the pressure-stabilizing tank is pressed out through pressure, and further reacts with hydrogen sulfide as a regenerated solution. The super-gravity oxygen-enriched oxidation regeneration method disclosed by the invention can significantly improve the oxidation rate, and is large in treatment quantity and small in occupied area simultaneously.

Description

[0001] Technical field: [0002] The invention relates to a high-gravity oxygen-enriched oxidation regeneration method and special equipment for a wet oxidation desulfurization process, and is suitable for catalyst regeneration processes of various wet oxidation methods. [0003] Background technique: [0004] Wet oxidation desulfurization is a process in which hydrogen sulfide absorbed by the solution is oxidized into elemental sulfur in the liquid phase and separated. It has the characteristics of high removal precision, large operating flexibility, and low operating cost. According to the different catalysts used in the desulfurization process, the wet oxidation desulfurization process is divided into three types: arsenic-based process, vanadium-based process, and iron-based process. Low efficiency and less use; the representative methods of vanadium-based process are ADA method and tannin extraction method. The vanadium-based process has disadvantages such as low sulfur cap...

AI Technical Summary

Problems solved by technology

In the oxidation process, due to the low solubility of oxygen in the complex iron solution, the oxidation reactor has always used a bubble tower with a large liquid holding capacity and a long gas residence time. The bubble tower has the characteristics of simple structure and stable operation. But the volume is huge and the mass transfer efficiency is low, which restricts the miniaturization and skid-mounted development of complex iron technology

[0005] Supergravity is a new type of process intensification equipment, which has been applied to complex iron desulfurization process. Chinese patent 200710101508.0 reports a method for supergravity complex iron desulfurization hydrogen sulfide. The absorber of this method adopts supergravity, and the oxidizer adopts bubble tower , the oxidation equipment is huge and the efficiency is low

Chinese patent 201110076120.6 and Chinese 201310353789.4 also report a similar method, but the oxidation process is carried out using air under normal pressure. Due to the low partial pressure of oxygen and low solubility of oxygen, the oxidation rate of ferrous iron is low, which limits the processing capacity of the process.

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