CN106378210A - A regenerating cleaning solution for an SCR denitration catalyst and a regenerating method thereof - Google Patents
A regenerating cleaning solution for an SCR denitration catalyst and a regenerating method thereof Download PDFInfo
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- CN106378210A CN106378210A CN201610688152.4A CN201610688152A CN106378210A CN 106378210 A CN106378210 A CN 106378210A CN 201610688152 A CN201610688152 A CN 201610688152A CN 106378210 A CN106378210 A CN 106378210A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J38/00—Regeneration or reactivation of catalysts, in general
- B01J38/48—Liquid treating or treating in liquid phase, e.g. dissolved or suspended
- B01J38/60—Liquid treating or treating in liquid phase, e.g. dissolved or suspended using acids
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J38/00—Regeneration or reactivation of catalysts, in general
- B01J38/02—Heat treatment
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J38/00—Regeneration or reactivation of catalysts, in general
- B01J38/48—Liquid treating or treating in liquid phase, e.g. dissolved or suspended
- B01J38/50—Liquid treating or treating in liquid phase, e.g. dissolved or suspended using organic liquids
- B01J38/52—Liquid treating or treating in liquid phase, e.g. dissolved or suspended using organic liquids oxygen-containing
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Abstract
A regenerating cleaning solution for an SCR denitration catalyst is disclosed. The regenerating cleaning solution includes 0.001-1 wt% of a microporous penetrant, and 0.001-1 wt% of a surfactant, with the balance being a deionized water solution of an acid having a concentration of 0.01-2 mol/L. The microporous penetrant includes polyoxyethylene alkyl ether. The surfactant is stearic acid or SDBS. The acid is sulfuric acid. The regenerating method using the regenerating cleaning solution includes (1) preparing the regenerating cleaning solution, (2) blowing prepared samples to remove dust, separately putting into a beaker containing 1000 mL of the regenerating cleaning solution and performing acid washing under ultrasonic waves for 30 min, and (3) performing air blast drying at 120 DEG C for 4 h. Dust on the surface and dust in micropores of the catalyst are cleaned, and alkali metal complexes and alkaline earth metal complexes which cause the catalyst surface to be poisoned are removed at the same time.
Description
Technical field
The present invention relates to honeycomb denitrating catalyst technical field, more particularly, to a kind of SCR denitration regeneration washing liquid
And its renovation process.
Background technology
Denitration refers to nitrogen oxides（NOx）Removing, up to 22,730,000 tons of China's NOx discharge in 2010, is the world
First big discharge state.NOx is the main cause forming acid rain, and the loss that China causes because of Acid Rain Pollution every year is more than 300,000,000,000
Unit.In numerous method of denitration, selective catalytic reduction（SCR）Denitration rate is high（＞ 90%）, technology maturation, nothing are harmful
Product generates, it has also become administer the main method of NOx both at home and abroad（Account for 96%）.In SCR system, catalyst is core, generally
Account for the 30%-50% of initial investment.Due to contain in flue gas the oxide such as K, Na, As and flying dust easily make catalyst poisoning and
Blocking, can make catalyst lose activity in use.The catalyst reducing for fouled catalyst and activity can lead to
Cross regeneration to re-use, regeneration expense only has the 30-50% of update cost, and activity can return to original more than 90%.Grind
Study carefully the regeneration of SCR catalyst, the service life of catalyst can be extended, for the operating cost, the mitigation ring that reduce SCR system
Border burden is significant.
At present, for catalyst regeneration washing, main process is washed and pickling two step, and technological process is longer and repeatedly clear
Wash and lead to catalyst active component to lose.For reduces cost, improve catalyst regeneration production efficiency, a kind of flue gas of the present invention
Denitrating catalyst one step regeneration washing liquid, can have good cleaning performance, can also reduce repeatedly clear simultaneously to catalyst
Wash the loss of activity that catalyst is caused.
Content of the invention
It is an object of the invention to provide a kind of SCR denitration regeneration washing liquid and its renovation process, obtained again
Raw cleanout fluid, while being carried out catalyst surface, micropore internal dust, removes the alkali gold causing catalyst surface poisoning
Belong to complex, alkaline-earth metal complex.
For achieving the above object, the present invention adopts following technical proposals：
A kind of SCR denitration regeneration washing liquid, by accounting for the micropore permeation agent of total content 0.001 ~ 1wt%, account for total content
0.001 ~ 1% surfactant, the deionized water solution composition of the acid of balance of 0.01-2mol/L, described micropore permeation agent
Including fatty alcohol-polyoxyethylene ether, described surfactant is one of stearic acid or SDBS, and described acid is sulphuric acid.
Preferably, micropore permeation agent accounts for total content 0.01 ~ 0.5wt%, and surfactant accounts for total content 0.01 ~ 0.5wt%
, the deionized water solution of the sulphuric acid of balance of 0.01-2mol/L.
Apply the renovation process of above-mentioned SCR denitration regeneration washing liquid, comprise the following steps：
（1）Configuration regeneration washing liquid：Micropore permeation agent accounts for total content 0.01 ~ 0.5wt%'s, surfactant account for total content 0.01 ~
0.5wt%'s, the deionized water solution of the sulphuric acid of balance of 0.01-2mol/L.
（2）After ready sample soot blowing dedusting, it is respectively put into the beaker filling 1000ml regeneration washing liquid, ultrasonic acid
Wash 30min；
（3）Under the conditions of 120C °, forced air drying 4h obtains regenerating denitrating catalyst.
The present invention compared with prior art, has the advantages that：
（1）While being carried out catalyst surface, micropore internal dust, remove the alkali metal causing catalyst surface poisoning
Complex, alkaline-earth metal complex；
（2）Waste flue gas denitration catalyst surface and micropore cleaning after cleaning, and no metal complex is attached to catalyst surface.By
With the addition of cationic surface active agent and micropore permeation agent in regeneration washing liquid, improve the surface to catalyst and micropore
Cleaning capacity, additionally, sulfuric acid solution has good cleaning performance to alkali metal complex, alkaline-earth metal complex, pass through
Spent catalyst after regeneration washing is fully able to continue normally to use.
Figure of description
Fig. 1 is 1000 times of scanning electron microscopic picture of washing embodiment of the present invention.
Fig. 2 is 1 1000 times of scanning electron microscopic picture of pickling embodiment of the present invention.
Fig. 3 is 2 1000 times of scanning electron microscopic picture of pickling embodiment of the present invention.
Fig. 4 is 3500 times of scanning electron microscopic picture of washing embodiment of the present invention.
Fig. 5 is 1 3500 times of scanning electron microscopic picture of pickling embodiment of the present invention.
Fig. 6 is 2 3500 times of scanning electron microscopic picture of pickling embodiment of the present invention.
Specific embodiment
With reference to specific embodiment, the present invention is done and supplement further, but limit the present invention never in any form.
Washing embodiment：
（1）Sampling, uses the spent catalyst of power plant, it is cut at random with length and width 60mm, height 100mm's is little
Sample, carries out labelling with label paper respectively；
（2）Configuration regeneration washing liquid：Micropore permeation agent accounts for total content 0.5wt%, and surfactant accounts for total content 0.5wt%, surplus
For deionized water solution.
（3）After ready sample soot blowing dedusting, it is respectively put into the beaker filling 1000ml regeneration washing liquid, ultrasonic acid
Wash 30min；
（4）Forced air drying 4h under the conditions of 120C °；
（5）Sample is carried out with electronic microscope photos and observes surface topography, analyze cleaning performance；
Pickling embodiment 1：
（1）Sampling, uses the spent catalyst of power plant, it is cut at random with length and width 60mm, height 100mm's is little
Sample, carries out labelling with label paper respectively；
（2）Configuration regeneration washing liquid：Micropore permeation agent accounts for total content 0.5wt%, and surfactant accounts for total content 0.5wt%, surplus
The deionized water solution of the sulphuric acid for 0.1mol/L.
（3）After ready sample soot blowing dedusting, it is respectively put into the beaker filling 1000ml regeneration washing liquid, ultrasonic acid
Wash 30min；
（4）Forced air drying 4h under the conditions of 120C °；
（5）Sample is carried out with electronic microscope photos and observes surface topography, analyze cleaning performance；
Pickling embodiment 2：
（1）Sampling, uses the spent catalyst of power plant, it is cut at random with length and width 60mm, height 100mm's is little
Sample, carries out labelling with label paper respectively；
（2）Configuration regeneration washing liquid：Micropore permeation agent accounts for total content 0.5wt%, and surfactant accounts for total content 0.5wt%, surplus
The deionized water solution of the sulphuric acid for 0.5mol/L.
（3）After ready sample soot blowing dedusting, it is respectively put into the beaker filling 1000ml regeneration washing liquid, ultrasonic acid
Wash 30min；
（4）Forced air drying 4h under the conditions of 120C °；
（5）Sample is carried out with electronic microscope photos and observes surface topography, analyze cleaning performance；
Interpretation of result：
Washing embodiment：Washing can remove most of catalyst surface dust, but the metal-oxide of catalyst surface is no
Method cleaning removes；
Pickling embodiment 1：0.1% pickling not only can remove most of catalyst surface dust, simultaneously the gold to catalyst surface
Belong to oxide and there is certain cleaning effect, but not exclusively；
Pickling embodiment 2：0.5% pickling not only can remove most of catalyst surface dust, simultaneously the gold to catalyst surface
Belong to oxide and there is good cleaning effect, cleaning is relatively complete, can be continuing with as raw catelyst；
Above are only the preferred embodiments of the present invention, be not limited to the present invention, those skilled in the art is come
Say, the present invention can have various modifications and variations.All any modifications within the spirit and principles in the present invention, made, equivalent
Replace, improve etc., should be included within the scope of the present invention.
Claims (3)
1. a kind of SCR denitration regeneration washing liquid it is characterised in that：By the micropore permeation accounting for total content 0.001 ~ 1wt%
Agent, the surfactant accounting for total content 0.001 ~ 1%, the deionized water solution composition of the acid of balance of 0.01-2mol/L, described
Micropore permeation agent include fatty alcohol-polyoxyethylene ether, described surfactant be one of stearic acid or SDBS, described acid
For sulphuric acid.
2. SCR denitration regeneration washing liquid according to claim 1 it is characterised in that：Described micropore permeation agent accounts for
Total content 0.01 ~ 0.5wt%'s, surfactant accounts for total content 0.01 ~ 0.5wt%, the sulphuric acid of balance of 0.01-2mol/L
Deionized water solution.
3. application claim 1 or 2 described in SCR denitration regeneration washing liquid renovation process it is characterised in that：Including
Following steps：
（1）Configuration regeneration washing liquid：Micropore permeation agent accounts for total content 0.01 ~ 0.5wt%'s, surfactant account for total content 0.01 ~
0.5wt%'s, the deionized water solution of the sulphuric acid of balance of 0.01-2mol/L；
（2）After ready sample soot blowing dedusting, it is respectively put into the beaker filling 1000ml regeneration washing liquid, ultrasonic pickling
30min；
（3）Under the conditions of 120C °, forced air drying 4h obtains regenerating denitrating catalyst.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610688152.4A CN106378210A (en) | 2016-08-19 | 2016-08-19 | A regenerating cleaning solution for an SCR denitration catalyst and a regenerating method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610688152.4A CN106378210A (en) | 2016-08-19 | 2016-08-19 | A regenerating cleaning solution for an SCR denitration catalyst and a regenerating method thereof |
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| CN106378210A true CN106378210A (en) | 2017-02-08 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108144656A (en) * | 2017-11-23 | 2018-06-12 | 浙江天蓝环保技术股份有限公司 | A kind of regenerated liquid and regeneration method for denitrating catalyst of being poisoned |
Citations (5)
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|---|---|---|---|---|
| CN102101060A (en) * | 2009-12-21 | 2011-06-22 | 中国科学院城市环境研究所 | Process and device for restoring activity of smoke denitration catalyst |
| CN103143402A (en) * | 2011-12-07 | 2013-06-12 | 徐树元 | Flue gas denitrification catalyst on-line regeneration cleaning liquid and preparation method thereof |
| CN104289258A (en) * | 2014-10-08 | 2015-01-21 | 於承志 | Acid pickling regenerating liquid for denitration catalyst and regenerating method |
| CN104549572A (en) * | 2014-12-30 | 2015-04-29 | 安徽省元琛环保科技有限公司 | Impregnation solution for regeneration of SCR (selective catalytic reduction) denitrification catalyst and preparation method of impregnation solution |
| CN105709863A (en) * | 2014-12-05 | 2016-06-29 | 中国石油化工股份有限公司 | SCR flue gas denitration catalyst regeneration fluid and preparation method thereof |
-
2016
- 2016-08-19 CN CN201610688152.4A patent/CN106378210A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102101060A (en) * | 2009-12-21 | 2011-06-22 | 中国科学院城市环境研究所 | Process and device for restoring activity of smoke denitration catalyst |
| CN103143402A (en) * | 2011-12-07 | 2013-06-12 | 徐树元 | Flue gas denitrification catalyst on-line regeneration cleaning liquid and preparation method thereof |
| CN104289258A (en) * | 2014-10-08 | 2015-01-21 | 於承志 | Acid pickling regenerating liquid for denitration catalyst and regenerating method |
| CN105709863A (en) * | 2014-12-05 | 2016-06-29 | 中国石油化工股份有限公司 | SCR flue gas denitration catalyst regeneration fluid and preparation method thereof |
| CN104549572A (en) * | 2014-12-30 | 2015-04-29 | 安徽省元琛环保科技有限公司 | Impregnation solution for regeneration of SCR (selective catalytic reduction) denitrification catalyst and preparation method of impregnation solution |
Non-Patent Citations (2)
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| 李丽 等: "《燃煤电厂SCR脱硝催化剂评价与再生》", 31 July 2015 * |
| 胡将军 等: "《燃煤电厂烟气脱硝催化剂》", 31 January 2014 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108144656A (en) * | 2017-11-23 | 2018-06-12 | 浙江天蓝环保技术股份有限公司 | A kind of regenerated liquid and regeneration method for denitrating catalyst of being poisoned |
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Application publication date: 20170208 |