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Double regeneration and utilization method for waste iron oxide desulfurizer powder

A secondary regeneration and iron oxide technology, which is applied to chemical instruments and methods, separation methods, and separation of dispersed particles, can solve the problems of unsatisfactory secondary regeneration effect and incomplete secondary regeneration, so as to reduce the replacement frequency and absorb Increased sulfur capacity, stress-relieving effects

Inactive Publication Date: 2005-03-16
于纵海
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the iron oxide powder desulfurizer itself will be regenerated when it is working, and now people also perform secondary regeneration treatment on the iron oxide powder desulfurizer, so as to prolong the service life of the iron oxide powder desulfurizer and reduce its replacement frequency. Relieve the pressure caused by environmental protection, but due to the tight packing density of iron oxide powder desulfurizer, the secondary regeneration is incomplete, and the secondary regeneration effect is very unsatisfactory

Method used

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  • Double regeneration and utilization method for waste iron oxide desulfurizer powder

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Embodiment 1

[0008] Embodiment 1: a secondary regeneration and utilization method of waste iron oxide powdery desulfurizer, comprising the following steps: (1) putting the scrapped and invalid waste iron oxide powdery desulfurizer into a mixer and stirring for 0.2 hours; ( 2) then add the basic salt group accounting for 0.4% of the waste iron oxide powdery desulfurizer gross weight that is loaded into the mixer, and this basic salt group includes sodium carbonate and / or potassium carbonate and / or sodium bicarbonate and / or Potassium bicarbonate was then stirred for 0.3 hour; (3) adding again accounted for 0.2% sodium hydroxide of the waste iron oxide powdery desulfurizer gross weight packed in the mixer, stirred for 0.3 hour; 7% of the total weight of the waste iron oxide powdery desulfurizer put into the mixer was added into the mixer with 7% synthetic ferric hydrate r-FeOOH, stirred for 0.5 hour, and the material was taken out from the mixer, and then left to stand for 72 hours. That is, ...

Embodiment 2

[0009] Embodiment 2: a secondary regeneration and utilization method of waste iron oxide powdery desulfurizer, comprising the following steps: (1) putting the scrapped and invalid waste iron oxide powdery desulfurizer into a mixer and stirring for 0.4 hours; ( 2) then add the basic salt group accounting for 0.6% of the waste iron oxide powdery desulfurizer gross weight that is loaded into the mixer, and this basic salt group includes sodium carbonate and / or salt of wormwood and / or sodium bicarbonate and / or Potassium bicarbonate was then stirred for 0.5 hour; (3) adding again accounted for 0.4% sodium hydroxide of the waste iron oxide powdery desulfurizer gross weight packed in the mixer, stirred for 0.5 hour; 9% of the total weight of the waste iron oxide powder desulfurizer in the mixer was added to the mixer, and 9% of the synthetic iron hydrate r-FeOOH was stirred for 1 hour, and the material was taken out from the mixer, and then left to stand for 120 hours. That is, the r...

Embodiment 3

[0010] Embodiment 3: a secondary recycling method of waste iron oxide powdery desulfurizer, comprising the following steps: (1) putting the scrapped and invalid waste iron oxide powdery desulfurizer into a mixer and stirring for 0.3 hours; ( 2) then add the basic salt group accounting for 0.5% of the waste iron oxide powdery desulfurizer gross weight that is loaded into the mixer, and this basic salt group includes sodium carbonate and / or salt of wormwood and / or sodium bicarbonate and / or Potassium bicarbonate, then stir 0.4 hour; (3) add the potassium hydroxide that accounts for 0.3% of the waste iron oxide powdery desulfurizer gross weight of packing in the mixer again, stir 0.4 hour; 8% of the total weight of the waste iron oxide powder desulfurizer in the mixer was added to the mixer, and 8% of the synthetic iron hydrate r-FeOOH was stirred for 0.75 hours, and the material was taken out from the mixer, and then left to stand for 96 hours. That is, the regeneration of the wa...

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Abstract

The invention relates to a kind of quadratic regeneration method for waste oxidate desulfurization agent in polyiron form. It contains the steps as follows: (1) put waste oxidate polyiron desulfurization agent rejected into kneading machine and mix; (2) then put in basic salt and mix it; (3) again put in the strong alkali such as sodium hydroxide or potassium hydroxide, and then mix it; (4) then put r-FeOOH that is hydrated iron with artificially synthesis into kneading machine, then mix it, and then still standing by 72-120 hours; finally the regeneration of waste oxidate desulfurization agent in polyiron form can be acquired. Compared with the existing technology, the oxidate desulfurization agent in polyiron form that be regenerated according to the regeneration method of the invention can be made the full use. Because it adds r-FeOOH that is the hydrated iron with artificially synthesis, which can make the absorbability of sulfur increased greatly, make the primary sulfur capacity improved triple, and make the accumulated working sulfur capacity improved 18%. And moreover, it prolongs life cycle of oxidate polyiron desulfurization agent, declines changing frequency of it, and alleviates pressure that it gives to environmental protection.

Description

technical field [0001] The invention relates to a regeneration method of a desulfurizer, in particular to a secondary regeneration utilization method of a waste iron oxide powder desulfurizer. Background technique [0002] At present, the main active ingredient of iron oxide powder desulfurizer for industrial use is iron oxide sludge generated in steel mills, commonly known as red mud. Compared with artificially synthesized iron oxide, the iron content and crystal structure of iron in it change greatly. Larger, more important is the a-F that can absorb sulfur 2 o 3 The content of active ingredients is low, so the sulfur capacity of the iron oxide powder desulfurizer prepared from it is low, the primary sulfur capacity is only 8%-9%, and the cumulative working sulfur capacity is only about 40%, so the actual use period is short. However, the powdered iron oxide desulfurizer requires hundreds of cubic meters every time it is used. Frequent replacement will undoubtedly increa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/96
Inventor 于纵海侯心荣田凤军
Owner 于纵海
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