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Regeneration method of denitration catalyst

A denitration catalyst and hot ethanol technology, applied in chemical instruments and methods, separation methods, dispersed particle separation, etc., can solve the problems that the catalyst structure enhancement cannot achieve practical effects, the solubility of silica sol is low, and the mechanical strength improvement is not fully considered. methods, etc., to achieve the effect of convenient and fast regeneration method, good activity recovery and outstanding regeneration effect.

Active Publication Date: 2017-12-15
苏州米颜生物科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing technology discloses the method of "adding a small amount of silica sol to the regeneration solution" to promote the finalization of the regenerated catalyst, but in fact, due to the low solubility of silica sol, it has no practical effect on the strengthening of the catalyst structure
It is true that the existing catalyst regeneration technology only considers the active regeneration of the deactivated catalyst, and the method of improving the mechanical strength is not fully considered in the regeneration process. Therefore, the existing regeneration technology cannot solve the problem of denitrification catalyst regeneration well.

Method used

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  • Regeneration method of denitration catalyst

Examples

Experimental program
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Effect test

Embodiment 1

[0028] A regeneration method for a denitration catalyst, the preparation steps of which are as follows:

[0029] Step 1, put the deactivated denitrification catalyst into an aqueous ethanol solution, vibrate ultrasonically for 10 minutes, and then dry it;

[0030] Step 2, soaking the dried denitrification catalyst in acid solution and alkali solution in sequence, rinsing with deionized water, drying or drying in the air;

[0031] Step 3, put the denitrification catalyst into the electrolytic cell, add electrolyte, electrolyze for 2 hours, take it out and dry it;

[0032] Step 4, soak the dried denitration catalyst in hot ethanol for 2 hours, and then filter it with hot ethanol;

[0033] Step 5, use nitrogen or a mixture of nitrogen and air to purge for 20 minutes;

[0034] In step 6, the purged denitrification catalyst is subjected to surface electrolysis and energization reaction for 10 minutes to obtain an active regenerated denitration catalyst.

[0035] The ethanol conc...

Embodiment 2

[0043] A regeneration method for a denitration catalyst, the preparation steps of which are as follows:

[0044] Step 1, put the deactivated denitration catalyst into the aqueous ethanol solution, vibrate ultrasonically for 15 minutes, and then dry it;

[0045] Step 2, soaking the dried denitrification catalyst in acid solution and alkali solution in sequence, rinsing with deionized water and drying;

[0046] Step 3, put the denitrification catalyst into the electrolytic cell, add electrolyte, electrolyze for 4 hours, take it out and dry it;

[0047] Step 4, soak the dried denitration catalyst in hot ethanol for 4 hours, and then filter it with hot ethanol;

[0048] Step 5, purging with nitrogen for 50 minutes;

[0049] In step 6, the purged denitrification catalyst is electrified by surface electrolysis for 15 minutes to obtain an active regenerated denitrification catalyst.

[0050]The ethanol concentration of the aqueous ethanol solution in the step 1 is 70%.

[0051] T...

Embodiment 3

[0058] A regeneration method for a denitration catalyst, the preparation steps of which are as follows:

[0059] Step 1, put the deactivated denitration catalyst into the aqueous ethanol solution, vibrate ultrasonically for 12 minutes, and then dry it;

[0060] Step 2, soaking the dried denitrification catalyst in acid solution and alkali solution in sequence, rinsing with deionized water and drying;

[0061] Step 3, put the denitrification catalyst into the electrolytic cell, add electrolyte, electrolyze for 3 hours, take it out and dry it;

[0062] Step 4, soaking the dried denitration catalyst in hot ethanol for 3 hours, and then filtering with hot ethanol;

[0063] Step 5, using a mixed gas of nitrogen and air to purge for 30 minutes;

[0064] In step 6, the purged denitrification catalyst is electrified by surface electrolysis for 12 minutes to obtain an active regenerated denitration catalyst.

[0065] The ethanol concentration of the aqueous ethanol solution in the s...

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Abstract

The invention discloses a regeneration method of a denitration catalyst. The denitration catalyst is subjected to primary ultrasonic dissolution of an ethanol aqueous solution, then is sequentially soaked and dissolved with an acid solution and an alkali solution after airing and then is soaked in hot ethanol after an electrolytic reaction, organic pollution is removed through a reaction and dissolution, finally a surface electrolysis reaction is conducted after purging to achieve active substance activation and secondary pollution degradation, and a high-activity regenerated denitration catalyst is obtained. The regeneration method is convenient and rapid to use, the activity recovery of the catalyst is good, and the regeneration effect is excellent.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and in particular relates to a regeneration method for a denitration catalyst. Background technique [0002] Nitrogen oxides, as one of the main air pollutants, have attracted widespread attention due to their causes of acid rain, light pollution, global warming, and depletion of the ozone layer. Coal burning produces a large amount of NO x Emission is one of the main sources of air pollution, acid rain and greenhouse effect, which brings great harm to the human living environment and is the focus of environmental protection at present. How to effectively eliminate NOx has become a key topic of concern. [0003] Selective Catalytic Reduction (SCR) technology, as a relatively mature and efficient flue gas denitrification technology, has been widely used in industry. The catalyst is the core component of the entire SCR denitrification system, and the investment accounts for a large proportion....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/96B01D53/86B01D53/56
CPCB01D53/8628B01D53/965
Inventor 王苏颜
Owner 苏州米颜生物科技有限公司
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