Method for desulfurizing acid gas containing hydrogen sulfide and recovering sulfur

Abstract

The invention discloses a method for desulfurizing acid gas containing hydrogen sulfide and recycling sulfur. The method for desulfurizing acid gas containing hydrogen sulfide and recycling sulfur sequentially comprises the following steps: introducing the acid gas into a combustion furnace to be mixed with air introduced by the other pipeline so as to carry out a combustion reaction; introducing the gas reacted in the combustion furnace into a cooler to be cooled to 230-250 DEG C, after cooling, separating the cooled liquid sulfur at a liquid outlet, introducing mixed gas in the combustion furnace into a catalyst reactor, enabling hydrogen sulfide to react with sulfur dioxide in the catalyst reactor so as to generate sulfur and water, and separating the generated liquid sulfur at the liquid outlet of the catalyst reactor; introducing the mixed gas in the catalyst reactor into a hydrogenation reactor and enabling the sulfur dioxide to react with hydrogen in the hydrogenation reactor; introducing the gas in the hydrogenation reactor into a hydrogen sulfide absorption device and preparing the hydrogen sulfide into elemental sulfur under the action of an alkaline solution, a complex catalyst and the introduced air. The method for desulfurizing acid gas containing hydrogen sulfide and recycling sulfur has the advantages of short process route, high quality of produced sulfur and low energy consumption, is capable of fully removing SO2 gas and is green and environmentally friendly.

Description

technical field [0001] The invention relates to the technical field of industrial waste gas treatment, in particular to a method for desulfurizing acid gas containing hydrogen sulfide and recovering sulfur. Background technique [0002] With the rapid development of my country's economy, the demand for raw materials such as coal, oil, and natural gas continues to increase. Due to the small amount of oil and natural gas in my country, most of them rely on imports from abroad. With the increasing demand in the national market, it is difficult to import high-quality raw materials, and price competition is incentivized. In order to reduce costs, most of the imported raw materials contain high sulfur content. In order to meet subsequent customer and market demands, sulfur must be removed. The sulfur recovery process has been introduced and developed in China for nearly 40 years, showing a parallel development trend of domestic free technology and international technology. In 18...

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Problems solved by technology

However, this invention cannot completely remove SO 2 , gas emissions, and H 2 The absorption treatment of S consumes a lot of energy, therefore, it is necessary to further improve the method

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