so 2 Gas pre-reforming acid production process and equipment

A SO2, pre-conversion technology, applied in the direction of sulfur dioxide/sulfurous acid, inorganic chemistry, sulfur compounds, etc., can solve the problem of catalyst overheating and burning, and achieve good operation stability
CN106672919BActive Publication Date: 2019-08-09中铝国际南方工程有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
中铝国际南方工程有限公司
Publication Date
2019-08-09

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Abstract

The invention relates to an acid making process and device adopting SO2 pre-reforming. Initial SO2 flue gas mixed with O2 is heated by a pre-circulating heat exchanger and mixed with SO3 flue gas sent by a pre-circulating fan, and the mixed gas enters a catalyst layer of a pre-reformer for a reaction; SO3 flue gas at an outlet of the pre-reformer enters the pre-circulating heat exchanger directly or through a steam superheater, and the initial SO2 flue gas is heated; the SO3 flue gas cooled by the pre-circulating heat exchanger is divided into two parts; one part is extracted by the pre-circulating fan and mixed with the heated initial SO2 flue gas, and the mixed gas enters the pre-reformer; the other part enters a traditional SO2 reforming acid system directly or through a pre-absorbing device. The pre-circulating reforming process has very high adaptability to concentration fluctuation of SO2 in the flue gas and can be taken as a preprocessing module to be directly connected before a traditional '3+1' double-reforming double-absorbing acid making system without intervening in a follow-up '3+1' acid making process. High-concentration SO2 reforming requirements not exceeding the extreme resisting temperature of a catalyst are met.
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Description

technical field

[0001] The present invention relates to a kind of SO in sulfuric acid industry 2 Contact acid production technology, specifically related to a kind of SO 2 Gas pre-conversion acid production process and equipment. Background technique

[0002] In the unconventional high-concentration SO2 currently put into industrial production 2 In the flue gas conversion process, the technologies adopted by foreign companies mainly include: 1. Outotec’s LUREC TM cyclic conversion process. 2. The "pre-conversion process" of Mengmoke Company. 3. BAYQIK of Bayer Technologies TM Preconversion preabsorption process. The technologies adopted by domestic companies mainly include: 1. "Pre-conversion and pre-absorption process"; 2. "Non-equilibrium" high-concentration SO 2 transforming technology.

[0003] Outotec's LUREC TM The circulation transformation technology mainly utilizes the circulating flue gas after the first transformation (three-layer transformation) to extra...

Claims

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