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

Abstract

The present invention discloses a supergravity pressurization oxidation regeneration method of a wet oxidation desulfurization process, wherein the method comprises that: a desulfurization rich liquid and air from an air compressor respectively enter a supergravity machine, an oxidation reaction is performed in a filler, a catalyst is regenerated, the gas discharged from the supergravity machine enters a gas-liquid separation tank, mist harvesting dewatering is performed, evacuation is performed, the oxidized and regenerated catalyst solution enters a pressure stabilizing tank, the pressure stabilizing tank is communicated to the gas-liquid separation tank so as to stabilize the pressure of the supergravity machine, and the solution of the pressure stabilizing tank is extruded out through the pressure and is adopted as the regenerated solution so as to continuously react with hydrogen sulfide. According to the present invention, the oxidation rate can be significantly increased, the treatment amount is high, and the occupation area is small.

Description

[0001] Technical field: [0002] The invention relates to a supergravity pressurized 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 capacit...

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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