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Regeneration technology for wet flue gas desulfurization rich solution

A technology for wet desulfurization and desulfurization rich liquid, applied in the field of desulfurization, can solve the problems of low regeneration efficiency and many side reactions, and achieve the effect of improving regeneration efficiency, increasing mass transfer rate, and being beneficial to recycling.

Active Publication Date: 2017-05-31
BEIJING SJ ENVIRONMENTAL PROTECTION & NEW MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The technical problem to be solved by the present invention is to overcome the problems of many side reactions and low regeneration efficiency in existing wet desulfurization rich liquid regeneration, and to provide a wet desulfurization rich liquid with no side reactions and high regeneration efficiency regeneration process

Method used

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  • Regeneration technology for wet flue gas desulfurization rich solution
  • Regeneration technology for wet flue gas desulfurization rich solution

Examples

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Embodiment 1

[0038]This embodiment provides a new process for desulfurization and regeneration of lye, comprising the following steps:

[0039] (1) A certain amount of sodium hydroxide is placed in the lye preparation tank and water is added to prepare a desulfurization solution with a concentration of 0.1mol / L;

[0040] (2) Into the desulfurization liquid obtained in step (1), feed natural gas with a hydrogen sulfide concentration of 20v%, control the temperature of the desulfurization liquid to be 40° C. and ensure that the raw material gas is in full contact with the desulfurization liquid to obtain desulfurization rich liquid, and the raw material after purification The hydrogen sulfide concentration in the gas is 5ppm;

[0041] (3) Pump the desulfurized rich liquid in step (2) into the regeneration tank, and add magnetic iron oxide red Fe with a particle size of 0.1 to 0.6 mm in the regeneration tank 21.333 o 32 , and guarantee that the magnetic iron oxide red Fe 21.333 o 32 HS in...

Embodiment 2

[0043] This embodiment provides a new process for desulfurization and regeneration of lye, comprising the following steps:

[0044] (1) A certain amount of sodium carbonate is placed in the lye preparation tank and water is added to be mixed with a desulfurization solution whose concentration is 0.5mol / L;

[0045] (2) Spray the desulfurization liquid empty tower obtained in step (1) into the desulfurization tower, and the oil field associated gas with a hydrogen sulfide concentration of 20v% is in reverse contact with the desulfurization liquid, and the temperature of the desulfurization liquid is controlled to be 60° C. and to ensure that the feed gas and the desulfurization liquid The desulfurization liquid is fully contacted to obtain a desulfurization-rich liquid, and the concentration of hydrogen sulfide in the raw gas after purification is 1ppm;

[0046] (3) Pump the desulfurized rich liquid in step (2) into the regeneration tank, and add magnetic iron oxide red Fe with ...

Embodiment 3

[0048] This embodiment provides a new process for desulfurization and regeneration of lye, comprising the following steps:

[0049] (1) A certain amount of potassium hydroxide is placed in the lye preparation tank and water is added to be mixed with a desulfurization solution whose concentration is 1.7mol / L;

[0050] (2) Spray the empty desulfurization liquid obtained in step (1) into the packed desulfurization tower, the pure hydrogen sulfide is in reverse contact with the desulfurization liquid, the temperature of the desulfurization liquid is controlled at 80°C and the full contact between the feed gas and the desulfurization liquid is obtained. Desulfurization rich liquid, the hydrogen sulfide concentration in the raw material gas after purification is 90ppm;

[0051] (3) Pump the desulfurized rich liquid in step (2) into the regeneration tank, and add magnetic iron oxide red Fe with a particle size of 0.01 to 0.5 mm into the regeneration tank 21.333 o 32 , and guarantee...

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Abstract

The invention provides a regeneration technology for wet flue gas desulfurization rich solution. According to the regeneration technology, magnetic iron oxide red Fe21.333O32 is added into the desulfurization rich solution, mixture is sufficiently stirred, so that the mixture reacts, HS<-> in the desulfurization rich solution is transformed into OH<->, FeS2 and FeS sediment is generated and filtered, pure regeneration desulfurization solution with the OH<-> can be obtained, circulation use of the desulfurization solution is facilitated, other secondary reactions are avoided, the OH<-> cannot be consumed in the regeneration process, regeneration efficiency of the regeneration technology is improved and can reach 100% in a measured manner, by-product iron sulfides can be used for hydrogenation catalysts, and the economic value of the process is improved.

Description

technical field [0001] The invention belongs to the technical field of desulfurization, and in particular relates to a regeneration process of wet desulfurization rich liquid. Background technique [0002] The existing technology mostly adopts the wet desulfurization method for the removal of sulfide, and the main desulfurization processes include the tannin extract method, the ADA method, the PDS method, and the HPF method (H refers to hydroquinone, P refers to PDS, F refers to Refers to ferrous sulfate) and lye method. Among them, the tannin extraction method and the ADA method belong to the "binary catalytic oxidation method", and the H2S in the rich liquid flowing out from the bottom of the desulfurization tower - In the rich liquid tank, most of them are covered by V 5+ Oxidized to elemental sulfur, the regenerated desulfurization liquid can be obtained after solid-liquid separation, but the disadvantage is that the desulfurization liquid contains arsenic or vanadium,...

Claims

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Application Information

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IPC IPC(8): B01D53/96B01J27/043
CPCB01D53/96B01D2257/304B01J27/043
Inventor 高群仰刘振义崔永君刘玉军张君刘营张志民
Owner BEIJING SJ ENVIRONMENTAL PROTECTION & NEW MATERIAL CO LTD