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Gas desulfurization sulfur slurry concentration process method

A process method and technology of sulfur slurry, applied in the directions of sulfur trioxide/sulfuric acid, chemical instruments and methods, sulfur compounds, etc., can solve the problems of large investment, complex and tedious procedures, etc., to simplify the process, save construction funds, and reduce operations. cost effect

Inactive Publication Date: 2015-09-16
NINGBO KEXIN CHEM ENG TECH
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  • Description
  • Claims
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Problems solved by technology

[0005] The above sulfur slurry concentration needs to go through processes such as centrifugal separation, evaporation and concentration, and the ratio of the two. The process is complicated and cumbersome, and the investment is large.

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  • Gas desulfurization sulfur slurry concentration process method

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Embodiment Construction

[0017] specific implementation

[0018] join figure 1 , the method of the present invention comprises the steps:

[0019] 1). The sulfur slurry containing elemental sulfur and salts from the gas desulfurization-regeneration system is directly sent to the heater (1) for heating, that is, the sulfur slurry containing elemental sulfur and salts from the gas desulfurization-regeneration system does not need to be pre-heated. Separation of elemental sulfur (sulfur foam) goes directly to the heater (1) of the system. The temperature of the sulfur slurry liquid is higher than the evaporating temperature of the evaporator (2), but lower than the melting point of elemental sulfur to ensure that the elemental sulfur does not melt. The heat source of the heater can be steam, hot water, or flue gas and ammonia distillation waste water , circulating ammonia water, gas waste heat at the top of the primary cooler and other heat sources;

[0020] 2). The sulfur slurry heated by the heate...

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Abstract

The invention discloses a gas desulfurization sulfur slurry concentration process method comprising the following steps: sulfur slurry obtained from a gas desulfurization-regeneration system and containing elemental sulfur (sulfur foam) and salts is directly delivered into a heater and is heated and evaporated, wherein the temperature of the sulfur slurry is controlled at below the melting point of elemental sulfur. According to different heat sources, the evaporation process can be selected from micro-pressure evaporation, normal-pressure evaporation and vacuum evaporation. After concentration, a sulfur slurry water content can be lower than 50 wt %.

Description

technical field [0001] The invention relates to a process method for concentrating coal gas desulfurization sulfur slurry. The concentrated sulfur slurry can meet the requirement of sulfuric acid preparation. Background technique [0002] In the traditional gas wet oxidation desulfurization process, the hydrogen sulfide in the gas is absorbed in the desulfurization tower, and then the hydrogen sulfide is oxidized into elemental sulfur by air in the regeneration tower, suspended in the desulfurization liquid, and forms a moisture greater than 65% sulfur slurry mixture, sulfur slurry to produce sulfuric acid generally requires a moisture content of not more than 50%. [0003] At present, the method for preparing sulfur slurry with a moisture content of not more than 50% is that the sulfur slurry is first centrifuged through a centrifuge to separate elemental sulfur, and the remaining liquid not containing elemental sulfur is evaporated to remove excess water, and then the evap...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B17/027C01B17/69
Inventor 范文松樊晓光朱志雄李少源
Owner NINGBO KEXIN CHEM ENG TECH