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CN108097045A - A kind of method of denitrating catalyst recycling utilization - Google Patents

A kind of method of denitrating catalyst recycling utilization Download PDF

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Publication number
CN108097045A
CN108097045A CN201711461799.4A CN201711461799A CN108097045A CN 108097045 A CN108097045 A CN 108097045A CN 201711461799 A CN201711461799 A CN 201711461799A CN 108097045 A CN108097045 A CN 108097045A
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CN
China
Prior art keywords
catalyst
drying
level
activity
activity determination
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201711461799.4A
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Chinese (zh)
Inventor
李清伍
郑龙阔
邹卫平
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guangzhou Development Power Technology Co Ltd
Guangzhou Wanglong Thermoelectric Co
Guangzhou Development Group Inc
Original Assignee
Guangzhou Development Power Technology Co Ltd
Guangzhou Wanglong Thermoelectric Co
Guangzhou Development Group Inc
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Publication date
Application filed by Guangzhou Development Power Technology Co Ltd, Guangzhou Wanglong Thermoelectric Co, Guangzhou Development Group Inc filed Critical Guangzhou Development Power Technology Co Ltd
Priority to CN201711461799.4A priority Critical patent/CN108097045A/en
Publication of CN108097045A publication Critical patent/CN108097045A/en
Pending legal-status Critical Current

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/96Regeneration, reactivation or recycling of reactants
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/74General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86Catalytic processes
    • B01D53/8621Removing nitrogen compounds
    • B01D53/8625Nitrogen oxides
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J38/00Regeneration or reactivation of catalysts, in general
    • B01J38/48Liquid treating or treating in liquid phase, e.g. dissolved or suspended
    • B01J38/60Liquid treating or treating in liquid phase, e.g. dissolved or suspended using acids
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2251/00Reactants
    • B01D2251/20Reductants
    • B01D2251/206Ammonium compounds
    • B01D2251/2062Ammonia

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biomedical Technology (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Health & Medical Sciences (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Exhaust Gas Treatment By Means Of Catalyst (AREA)
  • Catalysts (AREA)

Abstract

The invention discloses a kind of methods of denitrating catalyst recycling utilization, it the method achieve the activation recovering to inactivating denitrating catalyst and Activity determination carried out to it, realize unqualified and qualified catalyst Effective selection, effectively ensure the qualification rate of the regenerated catalyst finally obtained, it ensure that catalytic efficiency when it carries out denitration catalyst again, improve the cycle efficieny of entire denitrating catalyst recycling utilization.

Description

A kind of method of denitrating catalyst recycling utilization
Technical field
The present invention relates to a kind of cyclic utilization methods, and in particular to a kind of side of denitrating catalyst recycling utilization Method.
Background technology
Nowadays, be improve the people's livelihood environment improve people's quality of life, China specify and perform every environmental protection policy and Measure, wherein, to increase control polluted gas NOxDischarge dynamics, relevant criterion accordingly puts into effect.Since power plant is NOxRow Amplify family, to reduce environmental pollution, denitration process must be carried out when carrying out flue gas emission.
Mainstream technology in denitration process method is selective catalytic reduction (SCR) and selective non-catalytic reduction (SNCR) Method, since selective non-catalytic reduction (SNCR) method is too high to the dependence of temperature, and denitration efficiency is low, is used in Practical Project Most is selective catalytic reduction (SCR) method, and the denitration efficiency of this method can reach more than 90%.
But with the extension of catalyst usage time, deactivation phenomenom, deactivated catalysis can gradually occur for catalyst Agent can not have the function that catalytic denitration reacts, but if directly throwing away deactivated catalyst and wasting very much, it is existing , the method for being also related to denitrating catalyst recycling utilization, but these methods are obtained not by qualified catalyst and not conformed to The regeneration cycle catalyst of lattice separates, and there is no guarantee that in the case of its qualification rate, is directly reused downstream in denitration reaction, This can largely effect on the efficiency of denitration reaction.
The content of the invention
The purpose of the present invention is:A kind of method that catalyst regeneration cycle utilizes is provided, this method can be to deactivated Denitrating catalyst carries out activation recovering, and can guarantee that the qualification rate of the regenerated catalyst finally obtained reaches production requirement, it is ensured that It reuses the high catalytic efficiency in denitration reaction.
Purpose to realize the present invention, is achieved using following technical scheme,
A kind of method of denitrating catalyst recycling utilization, including:
Catalyst surface is floated ash using dust catcher and sucks or floated catalyst surface with compressed air by step 1, soot blowing Ash is blown away;
Catalyst soak in deionized water is impregnated, and starts ultrasonic cleaning by step 2, washing, removes catalyst table Face spot;
Catalyst is inserted immersion treatment in pickle by step 3, pickling;
It is further comprising the steps of:
Step 4, level-one drying, catalyst is placed in level-one drying oven, carries out level-one drying and processing;
Step 5, activity implantation by catalyst soak in activating agent, carry out active implantation, realize activation recovering, obtain Regenerated catalyst;
Step 6, two level drying, regenerated catalyst is put into two level drying oven, carries out last drying and processing;
Step 7, Activity determination by the regenerated catalyst after progress two level drying, carry out Activity determination processing, if active It detects unqualified, returns to step 2;If Activity determination is qualified, into next step;
Regenerated catalyst is carried out packing processes by step 8, packing processes.
In the present invention, after active implantation is carried out to denitrating catalyst, Activity determination just is carried out to it, if Activity determination is not Qualification is again introduced into the process for cycling, into next step if qualified, the regenerated catalyst that guarantee can be finally obtained Qualification rate, to ensure that these regenerated catalysts reuse the high catalytic efficiency in denitration reaction.
Further, Activity determination described in step 7 is the catalyst activity η by detecting regenerated catalyst and/or denitration Efficiency k, wherein,In formula, CiRepresent the NO of Reactor inletxIt is dense Degree, CoRepresent the NO of reactor outletxConcentration, ν represent the flue gas flow m that laboratory test passes through catalyst3/ h, behalf catalysis The surface area of agent coupon, m2.Since, denitrating catalyst activation recovering just refers to improve its activity and denitration efficiency, to this two It is to the most directly effective judgement of the qualification rate of catalyst that a index, which is detected,.
Further, Activity determination qualification refers to that catalyst activity η is at least up to 90% and/or denitration of standard catalyst Efficiency k reaches 88%.In industrial production after out of stock catalytic reaction, the content of nitrogen oxides is no more than 40mg/Nm3, wherein urging The active and out of stock efficiency of agent is key factor, generally by catalyst η activity control standard catalyst 90% and/or Denitration efficiency k controls can comply with standard the amount of nitrogen oxides of discharge 88%.
Further, for the temperature that the level-one drying uses for 280~320 DEG C, the time is 85~115min.The present invention In, after cleaning process is carried out to catalyst, catalyst is soft in moistening, and when carrying out activity implantation catalyst is needed to have Certain mechanical strength, therefore, it is necessary to carry out level-one drying course, wherein, due to can may be brought into active implantation process again New moisture, so only needing catalyst drying to the requirement for meeting activity implantation, in general, level-one drying course uses Temperature is 280~320 DEG C, and the time is 85~115min.
Further, for the temperature that the two level drying uses for 330~370 DEG C, the time is 105~135min.The present invention In, after active implantation is carried out to catalyst, catalyst still in not moistening relatively, the state without sufficient mechanical strength, it is necessary to Two level drying is carried out to it, reaches the drying regime for meeting requirement, in general, the temperature that uses of level-one drying course for 330~370 DEG C, the time is 105~135min.
Further, the condition of the Activity determination is the area velocity of flue gas in the reactor for 15~25m/h, and cigarette NH in gas3/ NO molar ratios:1.5:1~1:1.5, H2The content of O is:5%~15%, O2Content is:3%~7%, SO2Content For:400~600 μ L/L, temperature are:360℃±8℃.Detailed, this detection must make standard catalyst and regenerated catalyst It is first compared in identical test condition, using final relative value as assessment.
Compared with the prior art, the device have the advantages that being:
The present invention provides a kind of methods that catalyst regeneration cycle utilizes, and the method achieve to inactivating denitrating catalyst Activation recovering and Activity determination is carried out to it, realize underproof denitrating catalyst and qualified screening of catalyst, have Effect ensures the qualification rate of the regenerated catalyst finally obtained, ensure that catalytic efficiency when it carries out denitration catalyst again, improves The cycle efficieny of entire denitrating catalyst recycling utilization.
Description of the drawings
Fig. 1 is the flow chart of the present invention.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with the accompanying drawings to embodiment of the present invention It is described in more detail.
Embodiment 1
As shown in Figure 1, a kind of method of denitrating catalyst recycling utilization is present embodiments provided, including:
Catalyst surface is floated ash using dust catcher and sucks or floated catalyst surface with compressed air by step 1, soot blowing Ash is blown away;
Catalyst soak in deionized water is impregnated, and starts ultrasonic cleaning by step 2, washing, removes catalyst table Face spot;
Catalyst is inserted immersion treatment in pickle by step 3, pickling;
It is further comprising the steps of:
Step 4, level-one drying, catalyst is placed in level-one drying oven, carries out level-one drying and processing;
Step 5, activity implantation by catalyst soak in activating agent, carry out active implantation, realize activation recovering, obtain Regenerated catalyst;
Step 6, two level drying, regenerated catalyst is put into two level drying oven, carries out last drying and processing;
Step 7, Activity determination by the regenerated catalyst after progress two level drying, carry out Activity determination processing, if active It detects unqualified, returns to step 2;If Activity determination is qualified, into next step;
Regenerated catalyst is carried out packing processes by step 8, packing processes.
Further, Activity determination described in step 7 is the catalyst activity η by detecting regenerated catalyst and/or denitration Efficiency k, wherein,In formula, CiRepresent the NO of Reactor inletxIt is dense Degree, coRepresent the NO of reactor outletxConcentration, ν represent the flue gas flow m that laboratory test passes through catalyst3/ h, behalf catalysis The surface area of agent coupon, m2.Since, denitrating catalyst activation recovering just refers to improve its activity and denitration efficiency, to this two It is to the most directly effective judgement of the qualification rate of catalyst that a index, which is detected,.
Further, Activity determination qualification refers to that catalyst activity η is at least up to 90% and/or denitration of standard catalyst Efficiency k reaches 88%.
Further, the temperature that the level-one drying uses is 300 DEG C, time 100min.
Further, the temperature that the two level drying uses is 350 DEG C, time 120min.
Further, the condition of the Activity determination is that the area velocity of flue gas in the reactor is 20m/h, and in flue gas NH3/ NO molar ratios:1.05:1, H2The content of O is:10%, O2Content is:5%, SO2Content is:500 μ L/L, temperature are:360 ℃±5℃。
Embodiment 2
The present embodiment and embodiment 1 are the difference is that the level-one drying temperature is 320 DEG C, time 80min.
Embodiment 3
The present embodiment and embodiment 1 are the difference is that the two level drying temperature is 360 DEG C, time 100min.

Claims (5)

1. a kind of method of denitrating catalyst recycling utilization, including,
Catalyst surface is floated ash and sucks or catalyst surface is floated ash with compressed air and blown by step 1, soot blowing using dust catcher It goes;
Catalyst soak in deionized water is impregnated, and starts ultrasonic cleaning by step 2, washing, and removal catalyst surface is dirty Stain;
Catalyst is inserted immersion treatment in pickle by step 3, pickling;
It is it is characterized in that, further comprising the steps of:
Step 4, level-one drying, catalyst is placed in level-one drying oven, carries out level-one drying and processing;
Step 5, activity implantation by catalyst soak in activating agent, carry out active implantation, realize activation recovering, regenerated Catalyst;
Step 6, two level drying, regenerated catalyst is put into two level drying oven, carries out last drying and processing;
Step 7, Activity determination by the regenerated catalyst after progress two level drying, carry out Activity determination processing, if Activity determination It is unqualified, return to step 2;If Activity determination is qualified, into next step;
Regenerated catalyst is carried out packing processes by step 8, packing processes.
A kind of 2. method of denitrating catalyst recycling utilization according to claim 1, which is characterized in that step 7 institute State Activity determination be by detecting the catalyst activity η of catalyst and/or denitration efficiency k, wherein,
A kind of 3. method of denitrating catalyst recycling utilization according to claim 2, which is characterized in that Activity determination Qualification refers to that catalyst activity η is at least up to the 90% of standard catalyst and/or denitration efficiency k and reaches 88%.
4. according to a kind of method of denitrating catalyst recycling utilization of claims 1 to 3 any one of them, feature exists In for the temperature that the level-one drying uses for 280~320 DEG C, the time is 85~115min.
5. according to a kind of method of denitrating catalyst recycling utilization of claims 1 to 3 any one of them, feature exists In for the temperature that the two level drying uses for 330~370 DEG C, the time is 105~135min.
CN201711461799.4A 2017-12-28 2017-12-28 A kind of method of denitrating catalyst recycling utilization Pending CN108097045A (en)

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Application Number Priority Date Filing Date Title
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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102103047A (en) * 2009-12-21 2011-06-22 中国科学院城市环境研究所 Method and device for detecting fume denitration catalyst activity
CN103638991A (en) * 2013-11-18 2014-03-19 广东电网公司电力科学研究院 Composite apparatus for generating SCR denitrification catalyst and testing activity of catalyst before and after regeneration
CN104475174A (en) * 2014-11-25 2015-04-01 安徽迪诺环保新材料科技有限公司 Regenerating method of invalid SCR denitration catalyst
CN106902895A (en) * 2017-03-21 2017-06-30 黑龙江丰迪环保科技有限公司 Failure denitrating catalyst regeneration method

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102103047A (en) * 2009-12-21 2011-06-22 中国科学院城市环境研究所 Method and device for detecting fume denitration catalyst activity
CN103638991A (en) * 2013-11-18 2014-03-19 广东电网公司电力科学研究院 Composite apparatus for generating SCR denitrification catalyst and testing activity of catalyst before and after regeneration
CN104475174A (en) * 2014-11-25 2015-04-01 安徽迪诺环保新材料科技有限公司 Regenerating method of invalid SCR denitration catalyst
CN106902895A (en) * 2017-03-21 2017-06-30 黑龙江丰迪环保科技有限公司 Failure denitrating catalyst regeneration method

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
刘建民等编: "《火电厂氮氧化物控制技术》", 31 December 2012, 中国电力出版社 *

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Application publication date: 20180601