CN105944770A - Organic acid regeneration method of alkali inactivated SCR denitration catalyst - Google Patents
Organic acid regeneration method of alkali inactivated SCR denitration catalyst Download PDFInfo
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- CN105944770A CN105944770A CN201610290500.2A CN201610290500A CN105944770A CN 105944770 A CN105944770 A CN 105944770A CN 201610290500 A CN201610290500 A CN 201610290500A CN 105944770 A CN105944770 A CN 105944770A
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- catalyst
- scr denitration
- organic acid
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- denitration catalyst
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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
- B01J38/62—Liquid treating or treating in liquid phase, e.g. dissolved or suspended using acids organic
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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
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- Chemical Kinetics & Catalysis (AREA)
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- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
The invention relates to an organic acid regeneration method of an alkali inactivated SCR denitration catalyst. The method comprises the following steps: carrying out high pressure blowing and ultrasonic cleaning on the alkali inactivated SCR denitration catalyst, immersing the treated alkali inactivated SCR denitration catalyst in an acetic acid solution with the volume concentration of 25-35% and the pH value of 2-2.3, and reacting the alkali inactivated SCR denitration catalyst for 1h; and taking out the catalyst, and drying the catalyst in a 120DEG C constant temperature air blowing drier to obtain the regenerated SCR denitration catalyst.. The organic acid regeneration method can remove alkaline oxides adhered to the catalyst, almost has no influences on the content of active components in the catalyst, omits the activating liquid immersion process in traditional technologies, has a good regeneration effect, has certain economy property, and has great values in the regeneration of the catalyst.
Description
Technical field
The present invention relates to the organic acid renovation process of a kind of alkali inactivation SCR denitration catalyst, belong to flue gas SCR denitration catalyst regeneration skill
Art field.
Background technology
Nitrogen oxides, as one of atmosphere pollution, is mainly derived from the discharge of motor-vehicle tail-gas and waste gas in fixed source, and it not only can cause
Acid rain, photochemical fog, depletion of the ozone layer and climate change etc., also can cause certain infringement to health.
Coal-burning power plant is the main source of discharged nitrous oxides, and SCR denitration technology is made with advantages such as its denitration efficiency height, technology maturations
For the most efficient method of stove outer control discharged nitrous oxides, the most each power plant uses.Owing to SCR denitration device is mostly installed at province
Between coal device and air preheater, this region flue-gas temperature is higher, and containing substantial amounts of flying dust and the SO of high concentration2Gas, thus cause
The catalysis activity of SCR catalyst can be gradually lowered along with the increase of SCR process operation time.Therefore, SCR catalyst is studied
Deactivation mechanism, and develop corresponding decaying catalyst regeneration technology, for reducing the operating cost of denitrating system, alleviate waste catalyst
Environmental hazard etc. significant.
Alkali metal poisoning is China's modal reason of coal-burning power plant's catalyst poisoning, there are some researches show and works as K2The load capacity of O is more than 1%
Time, catalyst thoroughly inactivates, Na2O poisoning also can not be ignored.Regenerate for alkali metal fouled catalyst, traditional sulphuric acid acid
Method of washing, while removing catalyst neutral and alkali oxide, can affect the active component content of catalyst, therefore, traditional renovation process
Need to add activity immersion and steep this operation, supplement the active component of loss.This traditional renovation process complex steps, activity group
Divide consumption big.It would therefore be desirable to the renovation process of a kind of economical and efficient, reduce the operating cost of denitrating system.
Summary of the invention
It is an object of the invention to provide the organic acid renovation process of a kind of alkali inactivation SCR denitration catalyst, this renovation process is simple to operate,
Economical and effective, and need not supplement activity liquid, the regeneration to catalyst has the biggest value.
The purpose of the present invention is achieved through the following technical solutions:
The organic acid renovation process of a kind of alkali inactivation SCR denitration catalyst, comprises the following steps:
Step 1: alkali inactivation SCR denitration catalyst is processed by high-pressure blowing and ultrasonic waves for cleaning, removes the dust of catalyst surface；
Step 2: by the catalyst soak in step 1 in organic acid actified solution；
Step 3: the pH value of actified solution and response time in regulating step 2；
Step 4: take out the catalyst of step 3, put in constant temperature blast drier；
Step 5: the temperature and time of constant temperature blast drier in regulating step 4, i.e. can obtain the SCR denitration of regeneration.
Preferably, described organic acid actified solution is acetum, and the volumetric concentration of acetum is 25%～35%.
Preferably, the pH value of described acetic acid actified solution is 2～2.3, and the response time is 1h.
Preferably, the described temperature in constant temperature blast drier is adjusted to 120 DEG C, and drying time is 5h.
The reproducibility of described organic acid acetic acid actified solution is more weak, affects the active component content in catalyst hardly, can save
Slightly in traditional handicraft, activating solution soaks this operation.
Compared with prior art, the invention have the characteristics that
A kind of organic acid renovation process of alkali inactivation SCR denitration catalyst, while removing catalyst basic anhydride, hardly
Affect the active component content in catalyst, it is convenient to omit in traditional handicraft, activating solution soaks this operation, and can reach the most again
Coming into force really, make regeneration technology simple, have certain economy, the regeneration to catalyst has the biggest value.
Detailed description of the invention:
Present disclosure is described below in conjunction with specific embodiments.
Embodiment 1
Take the SCR denitration of certain power plant's alkali inactivation, carry out the organic acid regeneration tests of decaying catalyst.
The organic acid renovation process of a kind of alkali inactivation SCR denitration catalyst described in the present embodiment, comprises the following steps:
Step 1: alkali inactivation SCR denitration catalyst is processed by high-pressure blowing and ultrasonic waves for cleaning, removes the dust of catalyst surface；
Step 2: by the catalyst soak in step 1 in organic acid acetic acid actified solution, and the volumetric concentration of acetum is
25%～35%；
Step 3: the pH value of regulating step 2 actified solution meets 2～2.3, the response time is 1h；
Step 4: being taken out by the catalyst in step 3, put in constant temperature blast drier, temperature is adjusted to 120 DEG C, dries 5h, i.e.
The SCR denitration of regeneration can be obtained.
Component content in the catalyst sample after XRF detection acetum pickling, almost detects in the catalyst sample after regeneration
Less than the oxide of Alkali-Metal Na, the oxide of alkali metal K is also greatly lowered, and the clearance of Na element is 98.9%, K unit
The clearance of element is 93.9%, is below the content value of alkali metal oxide in fresh catalyst, and regeneration effect is preferable.And acetic acid regeneration
Method affects the active component content in catalyst hardly, it is not necessary to activating solution soaks this operation.Comparatively speaking, sulphuric acid, first
The Acidwash solutions such as acid also active substance V in eluting partial catalyst while remove the basic anhydride in catalyst2O5, make to urge
In agent, active substance reduces, and catalytic performance declines.Specific surface area of catalyst additionally, detect through BET, after acetic acid pickling regeneration
There is lifting, illustrated that pickling also can improve specific surface area of catalyst.Therefore, acetic acid can be as preferable organic acid, in order to regenerating alkali
The SCR denitration of inactivation.
Claims (4)
1. the organic acid renovation process of an alkali inactivation SCR denitration catalyst, it is characterised in that the method includes following step:
(1), alkali inactivation SCR denitration catalyst is processed by high-pressure blowing and ultrasonic waves for cleaning, remove the dust of catalyst surface；
(2) catalyst soak after, cleaning in step (1) is in organic acid actified solution；
(3), the pH value of regulating step (2) solution and the response time；
(4), take out the catalyst of solution in step (3), put in constant temperature blast drier, under preference temperature, it is dried
Process, i.e. can obtain the SCR denitration of regeneration.
The organic acid renovation process of a kind of alkali inactivation SCR denitration catalyst the most according to claim 1, it is characterised in that: institute
In the step (2) stated, organic acid actified solution is acetum, and its volumetric concentration is 25%～35%.
The organic acid renovation process of a kind of alkali inactivation SCR denitration catalyst the most according to claim 1, it is characterised in that: institute
In the step (3) stated, the pH value of organic acid actified solution meets 2～2.3, and the immersion response time is 1h.
The organic acid renovation process of a kind of alkali inactivation SCR denitration catalyst the most according to claim 1, it is characterised in that: institute
In the step (4) stated, the temperature in constant temperature blast drier is 120 DEG C, and drying time is 5h.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610290500.2A CN105944770A (en) | 2016-04-26 | 2016-04-26 | Organic acid regeneration method of alkali inactivated SCR denitration catalyst |
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| CN201610290500.2A CN105944770A (en) | 2016-04-26 | 2016-04-26 | Organic acid regeneration method of alkali inactivated SCR denitration catalyst |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107051592A (en) * | 2017-05-19 | 2017-08-18 | 华北电力大学（保定） | A kind of renovation process of lead poisoning SCR denitration |
| CN107096578A (en) * | 2017-05-19 | 2017-08-29 | 华北电力大学（保定） | A kind of renovation process of arsenic poisoning SCR denitration |
| CN112058319A (en) * | 2020-08-24 | 2020-12-11 | 江苏龙净科杰环保技术有限公司 | Method for removing harmful substances in deactivated catalyst |
| CN113231080A (en) * | 2021-05-10 | 2021-08-10 | 山东天璨环保科技有限公司 | Regeneration method of rare earth-based SCR denitration catalyst |
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| WO2009113995A1 (en) * | 2008-03-11 | 2009-09-17 | Evonik Energy Services Llc | Method of regeneration of scr catalyst |
| CN103350004A (en) * | 2013-08-02 | 2013-10-16 | 张权 | SCR denitrification catalyst regeneration method and mixture for SCR denitrification catalyst regeneration liquid |
| CN103464221A (en) * | 2013-09-03 | 2013-12-25 | 广东电网公司电力科学研究院 | SCR (Selective Catalytic Reduction) denitration system catalyst regeneration equipment and regeneration technology method |
| CN105080622A (en) * | 2015-09-14 | 2015-11-25 | 中建中环工程有限公司 | Regeneration method for inactivated selective catalytic reduction (SCR) denitration catalyst |
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2016
- 2016-04-26 CN CN201610290500.2A patent/CN105944770A/en active Pending
Patent Citations (4)
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| WO2009113995A1 (en) * | 2008-03-11 | 2009-09-17 | Evonik Energy Services Llc | Method of regeneration of scr catalyst |
| CN103350004A (en) * | 2013-08-02 | 2013-10-16 | 张权 | SCR denitrification catalyst regeneration method and mixture for SCR denitrification catalyst regeneration liquid |
| CN103464221A (en) * | 2013-09-03 | 2013-12-25 | 广东电网公司电力科学研究院 | SCR (Selective Catalytic Reduction) denitration system catalyst regeneration equipment and regeneration technology method |
| CN105080622A (en) * | 2015-09-14 | 2015-11-25 | 中建中环工程有限公司 | Regeneration method for inactivated selective catalytic reduction (SCR) denitration catalyst |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107051592A (en) * | 2017-05-19 | 2017-08-18 | 华北电力大学（保定） | A kind of renovation process of lead poisoning SCR denitration |
| CN107096578A (en) * | 2017-05-19 | 2017-08-29 | 华北电力大学（保定） | A kind of renovation process of arsenic poisoning SCR denitration |
| CN107051592B (en) * | 2017-05-19 | 2019-12-13 | 华北电力大学（保定） | regeneration method of lead poisoning SCR denitration catalyst |
| CN107096578B (en) * | 2017-05-19 | 2020-05-19 | 华北电力大学（保定） | Regeneration method of arsenic poisoning SCR denitration catalyst |
| CN112058319A (en) * | 2020-08-24 | 2020-12-11 | 江苏龙净科杰环保技术有限公司 | Method for removing harmful substances in deactivated catalyst |
| CN113231080A (en) * | 2021-05-10 | 2021-08-10 | 山东天璨环保科技有限公司 | Regeneration method of rare earth-based SCR denitration catalyst |
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Application publication date: 20160921 |