Method for preparing sodium sulfide by processing hydrogen sulfide acid gas and special device thereof

Abstract

The invention discloses a method for preparing sodium sulfide by processing a hydrogen sulfide acid gas and a special device thereof. The method comprises the following steps of: absorbing and processing hydrogen sulfide in an acid gas by adopting sodium hydroxide as an absorption agent, generating sodium sulfide, and extracting sodium sulfide products from an absorption liquid; taking a tubular reactor and a supergravity reaction machine as absorption reaction devices, taking the tubular reactor as a previous stage reactor, and taking a rotational flow dual-supergravity machine as the post stage reactor; recycling an absorption agent between reactors reversely, sending a mother liquid of sodium sulfide products extracted from at the most previous stage to a crystallization extracting device, supplying a new absorption agent from a cycling liquid of the reactor of the last stage, and setting a heat exchanger or a cooler for heat exchange on a pipeline of a cycling absorption liquid. The method provided by the invention has good universality, and low construction expense economically, and the construction expense is less than about 15% of that of a sulfuric acid production device, and is about 25% of that of a Claus sulfur preparing device. By the technology device combining the tubular reactor and the rotational flow supergravity machine, the production capability has great elasticity, the operation is flexible, the speed regulating is flexible, and the method has good practicability.

Description

technical field [0001] The invention relates to an acid gas recovery and utilization method, in particular to a method for preparing sodium sulfide by using cyclone double hypergravity to treat hydrogen sulfide acid gas and a special device thereof. Background technique [0002] Acid gases such as hydrogen sulfide are produced in the production process of petrochemical, coal chemical, natural gas, sulfuric acid plants and other chemical fields, which must be treated. The traditional sour gas treatment processes are sulfur by Claus method and concentrated sulfuric acid by complete incineration method. These two sour gas treatment processes are mature in technology, the operation is automatically controlled, and the operators can stay away from the production site. Therefore, it is the most suitable combined process for industrial gas dehydrogen sulfide process, that is, the cycle absorption process. It is reasonable to combine the above two acid gas treatment processes for ...

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Problems solved by technology

The process routes are relatively long, the equipment is relatively large, and the environment is poor

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