CN101816975A - Wet-dry mixing electric dust remover - Google Patents

Wet-dry mixing electric dust remover Download PDF

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Publication number
CN101816975A
CN101816975A CN 201010172698 CN201010172698A CN101816975A CN 101816975 A CN101816975 A CN 101816975A CN 201010172698 CN201010172698 CN 201010172698 CN 201010172698 A CN201010172698 A CN 201010172698A CN 101816975 A CN101816975 A CN 101816975A
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CN
China
Prior art keywords
electric
water
wet
dust
wet type
Prior art date
Application number
CN 201010172698
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Chinese (zh)
Inventor
姜雨泽
李乐丰
齐达立
林爱杰
张永
江红
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山东电力研究院
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Application filed by 山东电力研究院 filed Critical 山东电力研究院
Priority to CN 201010172698 priority Critical patent/CN101816975A/en
Publication of CN101816975A publication Critical patent/CN101816975A/en

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Abstract

The invention relates to a wet-dry mixing electric dust remover. The electric dust remover mainly consists of an inlet smoke box, an air flow uniformly-distributing plate, a shell, a cathode line, an anode plate, an outlet smoke box, an outlet trough-shape plate, a rapping device, an ash bucket, a water distribution device and a water tank. The electric dust remover is characterized in that the upstream in the inflow direction of the smoke gas or the exhaust gas is provided with a dry-type ash removal electric field which adopts mechanical rapping, electromagnetic rapping or acoustic wave to remove the ash, the last electric field is a wet-type ash removal electric field which adopts a water film to remove the ash, the dry-type ash removal electric field and the wet-type ash removal electric field are arranged in the same shell, and the wet-type ash removal electric field is connected with an ash removal water treatment recycling system. The invention integrates the advantages of the dry-type electric dust removal and the wet-type electric dust removal, efficiently removes dust, ensures emission standards and minimizes the corrosion protection investment caused by the wet-type ash removal, the water treatment equipment investment and the running cost.

Description

Wet-dry mixing electric dust remover
Technical field
The invention belongs to the environmental protection filed of flue gas purification, relate in particular to a kind of high-pressure electrostatic Wet-dry mixing electric dust remover that utilizes dry type deashing and wet type deashing to combine.
Background technology
The dry electric precipitation device is most widely used at present, topmost dedusting means, be widely used in industry flue gas ash removals such as electric power, metallurgy, building materials, have advantages such as the smoke treatment amount is big, efficiency of dust collection is high, resistance is little, technical process is simple, operation and maintenance cost is low.But anti-corona than resistance bad adaptability, takes place when collecting high specific resistance flue dust (dust) to flue dust (dust) in the dry electric precipitation existence, has a strong impact on the electric precipitation operation, reduces efficiency of dust collection.The flue dust (dust) that captured the phenomenon of back-mixing in the air-flow once more takes place when collecting low resistivity flue dust (dust), and efficiency of dust collection is extremely low.Dry electric precipitation also exists rapping to cause that reentrainment of dust, corona wind cause problems such as reentrainment of dust, thereby common dry electric precipitation is difficult to reach 50mg/Nm 3Thermal power plant's dust emission standard, for the 30mg/Nm that be about to implement 3Discharge standard be difficult to especially realize.
The wet electrical dust precipitator utilization is cleaned the dust that is trapped on the pole plate in formation water membrane on the pole plate, thereby overcome the above-mentioned shortcoming of dry electric precipitation, make it have high dust removal performance, the common electrical dedusting is difficult to capture micron, sub-micron grade particle can both efficiently capture, and the coal-burning boiler smoke dust discharge concentration can be controlled at 10mg/Nm 3Below, for gas purification, dust content can be controlled at 1mg/Nm 3Below.But wet-esp also has its limitation: have corrosivity, need carry out preservative treatment; When the inlet dust concentration was too high, washing time prolonged, and water consumption also increases, and is not suitable for high dust concentration flue gas; Need carry out water treatment, increase water treatment facilities.These shortcomings of wet-esp increase its cost, and application is restricted, and are mainly used in the occasion that common dry electric precipitation and other dedusting means can't satisfy the smoke and dust treatment needs.In addition, existing wet electrical dust precipitator is not suitable for high temperature flue gases (waste gas) such as fire coal boiler fume.
Summary of the invention
Purpose of the present invention is exactly the shortcoming that overcomes single dry electric precipitation, wet-esp, and comprehensive utilization dry electric precipitation and electric precipitation advantage realize the effect of high efficiency electrostatic dedusting, and reduce investment and operating cost.
For achieving the above object, the present invention adopts following technical scheme:
A kind of Wet-dry mixing electric dust remover, mainly by the import smoke box, the airflow uniform distribution plate, housing, cathode line, positive plate, the outlet smoke box, the outlet slot template, rapping apparatus, ash bucket, water-distributing device, header tank is formed, it is characterized in that, be provided with several employing mechanical vibrators at flue gas or waste gas inflow direction upstream, the dry type deashing electric field of electromagnetic rapping or sound wave ashing, last electric field is for adopting the wet type deashing electric field of moisture film deashing, dry type deashing electric field and wet type deashing electric field are arranged in the same housing, and wet type deashing electric field is connected with the deashing water treatment cycle utilization system.
Described wet type deashing electric field water-distributing device can be and is arranged on wet type deashing electric field the gather dust atomizer of positive plate top or water distributor, cloth tank, cloth water tank, directly supply water, form moisture film at the wet type deashing electric field positive plate that gathers dust to the wet type deashing electric field positive plate that gathers dust.
Described wet type deashing electric field water-distributing device can be atomizer, be arranged in the gather dust top in space of wet type deashing electric field, to whole wet type deashing electric field atomization water droplet, water droplets is trapped in wet type deashing electric field and gathers dust and form ash removing water film on the positive plate after charged in the decline process.
Described wet type deashing electric field can be provided with cathode rapping device or sound wave ash cleaner, and target corona wire and framework thereof adopt mechanical vibrator, electromagnetic rapping or send sound wave and remove the flue dust that adheres on the negative electrode.
Described water distributor is installed in gather dust positive plate top of wet type deashing electric field, and perforate is sprayed water to pole plate on water distributor, pitch of holes 10~30mm, and aperture 1.0~3.0mm, hole for water spraying and water outlet median plane thereof and pole plate are 5~30 and spend angles.
In outlet slot template back outlet smoke box, demister can be set.
Header tank is established in described wet type deashing electric field below, is connected with the Ph value adjusting device with the purifying processing device of deashing water treatment cycle utilization system by pipeline, purifies adjusted water and turns back to water-distributing device by pipeline, once more deashing.
The present invention proposes a kind of Wet-dry mixing electric dust remover, form by import smoke box, airflow uniform distribution plate, housing, negative electrode, positive plate, outlet smoke box, outlet slot template, rapping apparatus, ash bucket, water-distributing device, header tank etc., dry type deashing electric field and wet type deashing electric field are arranged in the same electric cleaner housing, several electric fields of flue gas (waste gas) flow direction upstream adopt the dry type deashing, general dry type deashing electric field is 1~4, common 2~3, determine that according to actual conditions last electric field adopts the wet type deashing.
The dry type deashing electric field of Wet-dry mixing electric dust remover adopts mechanical vibrator, electromagnetic rapping or sound wave ashing, and last wet type deashing electric field adopts the moisture film deashing, forms the moisture film that one deck flows downward on pole plate, takes away the dust that is captured on the pole plate.
Wet type ash removing water film formation method, purifying flue gas condition according to deduster determines, when high temperature flue gases such as processing fire coal boiler fume, be advisable directly to form moisture film to pole plate water supply, as: overflow, the inner water storage of pole plate perforate water distribution, water distributor perforate are above it directly sprayed water or are sprayed or the like to pole plate to pole plate water spray, shower nozzle, wherein forming the moisture film mode with the water distributor perforate to the pole plate water spray optimizes the most, simple and practical, economy, film-formation result are good, can prevent the evaporation of deashing water, reduce water consumption.Adopt this kind moisture film formation method, cathodic electricity hachure and framework thereof still are in the high-temperature flue gas, still adopt the dry type deashing, do not have etching problem, need not anticorrosion; When handling low temperature or saturated flue gas (waste gas), form on the pole plate moisture film except that above-mentioned directly on pole plate the formation method, can adopt above the electric precipitation pole plate atomizer is installed, to the space jet atomization water droplet that gathers dust, water droplet is trapped in and forms moisture film on the pole plate.To low-temperature flue gas, this moisture film generation type is optimized the most, and water saving, film-formation result is good, and water droplets can capture fine solid particle, helps improving efficiency of dust collection.
Wet-dry mixing electric dust remover, wet type deashing electric field adopt water droplets to be captured in when forming moisture film on the pole plate by static, in the electric cleaner outlet dewater unit are set.
The water distributor perforate forms moisture film to the pole plate water spray, hole for water spraying spacing 10~30mm on the water distributor, and aperture 1.0~3.0mm, hole for water spraying and water outlet median plane thereof are 5~30 degree angles with the positive plate that gathers dust.
Wet type deashing water circulation use, water system is got to satisfactory water with water pump the top of wet type deashing electric field, supply water to water-distributing device, water-distributing device washes the dust that is captured on the pole plate at formation ash removing water film on the pole plate, flow into the header tank of wet type deashing electric field below, the deashing water that carries dust then enters the water treatment purifier, remove the suspension (dust) that carries in the deashing water through technical process such as precipitation, flocculation sediment, filtrations, and carry out the water quality adjustment, and then reach the deduster top, be used for deashing.
When the smoke treatment amount big, required pole plate height adopts patent applied for " a kind of ash removing water film for wet electric dust remover formation method and dust collecting pole plate used by same ", " a kind of wet-esp ash removing water film formation method dust collecting pole plate " described constraint formula pole plate and moisture film formation method when 6m is above.
The invention has the beneficial effects as follows:
(1) can high-effective dust-removing, utilize wet electrical dust precipitator as last utmost point dedusting means with high efficiency of dust collection, improve efficiency of dust collection, guarantee to realize qualified discharge;
(2) performance dry electric precipitation device technical process is simple, operation and maintenance cost is low, resistance is little, advantage of low energy consumption, preceding two (three) electric fields adopt dry electric precipitation, adopt wet-esp to compare with whole electric fields, antiseptic project amount 2/3~3/4 be can reduce, investment and operating cost reduced significantly;
(3) Wet-dry mixing electric dust remover reduces by 2~3 wet type deashing electric fields, reduces towards the grey water yield 2/3~3/4, and deashing water circulation use system water treating capacity reduces 2/3~3/4, and water treatment facilities investment and operating cost significantly reduce.Thereby, adopt dried wet mixing to close, can save the deashing water, significantly reduce investment, reduce operating cost;
(4) keep most flying dusts to be still dry type flyash, can utilize original ash transfer is memory device, can utilize the low-cost comprehensive utilization of original approach flyash.The trouble of avoiding the flyash wet processed to bring.To coal-burning power plant's electric cleaner, through preceding 2~3 dry type deashing electric fields, 95.3~99.0% flying dust is removed.Thereby most flying dusts are still the dry type flying dust, can adopt former approach to fully utilize.
(5) Wet-dry mixing electric dust remover that proposes of this patent can be handled the big flow flue gases of high temperature such as fire coal boiler fume, has solved the difficult problem that coal-fired plant flue gas can't adopt wet-esp.
In sum, adopt dried wet mixing to close electric precipitation, utilize dry electric precipitation to remove most flue dust, utilize wet-esp to guarantee qualified discharge, make full use of advantage separately, again the shortcoming of wet electrical dust precipitator has been dropped to minimum, significantly reduced investment and operating cost.
Description of drawings
Fig. 1 Wet-dry mixing electric dust remover schematic diagram;
Fig. 2 is the wet type deashing electric field positive plate sectional drawing that gathers dust.
Wherein, 1 import smoke box, 2 airflow uniform distribution plates, 3 cathodic electricity hachures, the 4 dry type deashing electric fields positive plate that gathers dust, 5 housings, the 6 wet type deashing electric fields positive plate that gathers dust, 7 water distributors, 8 water supply lines, 9 outlet smoke boxes, 10 outlet slot templates, 11 ash buckets, 12 rapping apparatus, 13 purifying processing devices, 14 header tanks, 15pH adjusting device.
The specific embodiment
The present invention will be further described below in conjunction with accompanying drawing and embodiment.
Embodiment 1:
Among Fig. 1, Wet-dry mixing electric dust remover is mainly by import smoke box 1, airflow uniform distribution plate 2, housing 5, outlet smoke box 9, outlet slot template 10, rapping apparatus 12, ash bucket 11, water-distributing device, header tank 14 is formed, it is characterized in that, be provided with several electric fields at flue gas or waste gas inflow direction upstream, except that the wet type deashing electric field of last electric field for employing wet type moisture film deashing, all the other electric fields all adopt mechanical vibrator, the dry type deashing electric field of electromagnetic rapping or sound wave ashing, dry type deashing electric field and wet type deashing electric field are arranged in the same housing 5, and wet type deashing electric field is connected with the deashing water treatment cycle utilization system.
Wet type deashing electric field water-distributing device is to be arranged on wet type deashing electric field the gather dust atomizer of positive plate 6 tops or water distributor 7, cloth tank, cloth water tank, directly supply water, form moisture films at the wet type deashing electric field positive plate 7 that gathers dust to gather dust positive plate 7 of wet type deashing electric field.Wet type deashing electric field also is provided with cathode rapping device or sound wave ash cleaner, and target corona wire and framework thereof adopt mechanical vibrator, electromagnetic rapping or send sound wave and remove the flue dust that adheres on the negative electrode.
Header tank 14 is established in wet type deashing electric field below, is connected with pH value adjusting device 15 with the purifying processing device 13 of deashing water treatment cycle utilization system by pipeline, purifies adjusted water and turns back to water-distributing device by pipeline, once more deashing.
Water distributor 7 is installed in wet type deashing electric field positive plate 6 tops of gathering dust, and perforate is sprayed water to pole plate on water distributor 7, pitch of holes 10mm, and aperture 1.0mm, hole for water spraying and water outlet median plane thereof and pole plate are 5 degree angles.
Embodiment 2:
In the present embodiment, hole for water spraying spacing 15mm, hole for water spraying aperture 1.8mm, hole for water spraying and water outlet median plane thereof and pole plate are 5 degree angles, and all the other structures are identical with embodiment 1, repeat no more.
Embodiment 3:
In the present embodiment, hole for water spraying spacing 25mm, hole for water spraying aperture 1.5mm, hole for water spraying and water outlet median plane thereof and pole plate are 30 degree angles, and all the other structures are identical with embodiment 1, repeat no more.
Embodiment 4:
In the present embodiment, wet type deashing electric field water-distributing device is an atomizer, be arranged in the gather dust top in space of wet type deashing electric field, to whole wet type deashing electric field atomization water droplet, water droplets is trapped in wet type deashing electric field and gathers dust and form ash removing water film on the positive plate 6 after charged in the decline process.In outlet slot template 10 back outlet smoke box 9, demister is set.

Claims (7)

1. Wet-dry mixing electric dust remover, mainly by the import smoke box, the airflow uniform distribution plate, housing, cathode line, positive plate, the outlet smoke box, the outlet slot template, rapping apparatus, ash bucket, water-distributing device, header tank is formed, it is characterized in that, be provided with several employing mechanical vibrators at flue gas or waste gas inflow direction upstream, the dry type deashing electric field of electromagnetic rapping or sound wave ashing, last electric field is for adopting the wet type deashing electric field of moisture film deashing, dry type deashing electric field and wet type deashing electric field are arranged in the same housing, and wet type deashing electric field is connected with the deashing water treatment cycle utilization system.
2. Wet-dry mixing electric dust remover as claimed in claim 1, it is characterized in that, described wet type deashing electric field water-distributing device is to be arranged on wet type deashing electric field the gather dust atomizer of positive plate top or water distributor, cloth tank, cloth water tank, directly supply water, on wet type deashing electric field gathers dust positive plate, form moisture film to the wet type deashing electric field positive plate that gathers dust.
3. Wet-dry mixing electric dust remover as claimed in claim 1, it is characterized in that, described wet type deashing electric field water-distributing device is an atomizer, be arranged in the gather dust top in space of wet type deashing electric field, to whole wet type deashing electric field atomization water droplet, water droplets is trapped in wet type deashing electric field after charged and gathers dust on the positive plate in the decline process, form ash removing water film.
4. Wet-dry mixing electric dust remover as claimed in claim 2, it is characterized in that, described wet type deashing electric field also is provided with cathode rapping device or sound wave ash cleaner, and target corona wire and framework thereof adopt mechanical vibrator, electromagnetic rapping or send sound wave and remove the flue dust that adheres on the negative electrode.
5. Wet-dry mixing electric dust remover as claimed in claim 2, it is characterized in that, described water distributor is installed in gather dust positive plate top of wet type deashing electric field, perforate is sprayed water to pole plate on water distributor, pitch of holes 10~30mm, aperture 1.0~3.0mm, hole for water spraying and water outlet median plane thereof and pole plate are 5~30 degree angles.
6. Wet-dry mixing electric dust remover as claimed in claim 3 is characterized in that, in outlet slot template back outlet smoke box demister is set.
7. as claim 1,2 or 3 described Wet-dry mixing electric dust removers, it is characterized in that, header tank is established in described wet type deashing electric field below, be connected with the Ph value adjusting device with the purifying processing device of deashing water treatment cycle utilization system by pipeline, purify adjusted water and turn back to water-distributing device, once more deashing by pipeline.
CN 201010172698 2010-05-17 2010-05-17 Wet-dry mixing electric dust remover CN101816975A (en)

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Cited By (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102784719A (en) * 2012-08-20 2012-11-21 山东大学 Water internally-distributed type flexible dust collecting electrode device
CN102784720A (en) * 2012-08-20 2012-11-21 山东大学 External water-distribution movable flexible dust collecting electrode device
CN102941158A (en) * 2012-12-05 2013-02-27 山东大学 Rigid anode plate surface water film arrangement technology and device
CN103143444A (en) * 2013-03-12 2013-06-12 清华大学 Dust collecting polar plate for wet electrostatic dust collection
CN103286006A (en) * 2012-02-28 2013-09-11 王长皓 Method and device for purifying oil smoke in no-clean static way
CN103418491A (en) * 2012-05-16 2013-12-04 江苏紫光吉地达环境科技股份有限公司 Method for improving efficiency of electric deduster for removing particulate matter 2.5 (PM2.5) dust in flue gas
CN103447151A (en) * 2013-08-29 2013-12-18 南京龙源环保有限公司 Compound type electric demister as well as process and use thereof
CN103920588A (en) * 2013-01-10 2014-07-16 陕西骏马环保工程有限公司 Electrical wet dust collector
CN104190540A (en) * 2014-08-15 2014-12-10 浙江诸暨利达环保设备有限公司 Dry-wet mixed electric precipitation device
CN104338608A (en) * 2013-07-31 2015-02-11 江西省三余环保节能科技有限公司 Electrostatic dust collector for industrial waste gas
CN104384022A (en) * 2014-09-17 2015-03-04 苏州新协力环保科技有限公司 Dust treatment device
CN105195324A (en) * 2015-10-17 2015-12-30 嘉兴市华能环保设备有限公司 Efficient wet type electric precipitator
CN105276594A (en) * 2015-10-13 2016-01-27 南京常荣声学股份有限公司 Gas-sound complex field uniform-distribution device and uniform-distribution method thereof
CN105276593A (en) * 2015-10-13 2016-01-27 南京常荣声学股份有限公司 Large-space dirt removal device with gas-sound complex fields uniformly distributed and dirt removal method of large-space dirt removal device
CN105344475A (en) * 2015-11-24 2016-02-24 山东信发环保工程有限公司 Dry-wet mixed type electrostatic precipitator and working method thereof
CN105396694A (en) * 2015-12-31 2016-03-16 哈尔滨众维豪环保科技有限公司 Integrated dry-and-wet electrostatic dust collector
CN105689132A (en) * 2016-03-11 2016-06-22 浙江信雅达环保工程有限公司 Dry-wet compound electric dust remover
CN106179742A (en) * 2016-08-30 2016-12-07 艾尼科环保技术(安徽)有限公司 A kind of dry and wet compound electrostatic precipitator of band evaporation cooling section
CN107051739A (en) * 2017-05-12 2017-08-18 浙江诸暨骏达环保设备有限公司 A kind of wet electrical dust precipitator
CN110201796A (en) * 2019-06-06 2019-09-06 扬州好管家科技信息咨询有限公司 A kind of gas-liquid separation device for wet electric precipitation

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CN103286006A (en) * 2012-02-28 2013-09-11 王长皓 Method and device for purifying oil smoke in no-clean static way
CN103418491A (en) * 2012-05-16 2013-12-04 江苏紫光吉地达环境科技股份有限公司 Method for improving efficiency of electric deduster for removing particulate matter 2.5 (PM2.5) dust in flue gas
CN102784719A (en) * 2012-08-20 2012-11-21 山东大学 Water internally-distributed type flexible dust collecting electrode device
CN102784720A (en) * 2012-08-20 2012-11-21 山东大学 External water-distribution movable flexible dust collecting electrode device
CN102941158A (en) * 2012-12-05 2013-02-27 山东大学 Rigid anode plate surface water film arrangement technology and device
CN102941158B (en) * 2012-12-05 2014-02-26 山东大学 Rigid anode plate surface water film arrangement technology and device
WO2014085949A1 (en) * 2012-12-05 2014-06-12 山东大学 Process and apparatus for arranging water film on surface of rigid anode plate
CN103920588A (en) * 2013-01-10 2014-07-16 陕西骏马环保工程有限公司 Electrical wet dust collector
CN103143444A (en) * 2013-03-12 2013-06-12 清华大学 Dust collecting polar plate for wet electrostatic dust collection
CN104338608A (en) * 2013-07-31 2015-02-11 江西省三余环保节能科技有限公司 Electrostatic dust collector for industrial waste gas
CN103447151A (en) * 2013-08-29 2013-12-18 南京龙源环保有限公司 Compound type electric demister as well as process and use thereof
CN104190540A (en) * 2014-08-15 2014-12-10 浙江诸暨利达环保设备有限公司 Dry-wet mixed electric precipitation device
CN104384022A (en) * 2014-09-17 2015-03-04 苏州新协力环保科技有限公司 Dust treatment device
CN105276594A (en) * 2015-10-13 2016-01-27 南京常荣声学股份有限公司 Gas-sound complex field uniform-distribution device and uniform-distribution method thereof
CN105276593A (en) * 2015-10-13 2016-01-27 南京常荣声学股份有限公司 Large-space dirt removal device with gas-sound complex fields uniformly distributed and dirt removal method of large-space dirt removal device
CN105276594B (en) * 2015-10-13 2018-03-23 南京常荣声学股份有限公司 A kind of gas sound Composite Field even distribution device and its uniform method
CN105195324A (en) * 2015-10-17 2015-12-30 嘉兴市华能环保设备有限公司 Efficient wet type electric precipitator
CN105344475A (en) * 2015-11-24 2016-02-24 山东信发环保工程有限公司 Dry-wet mixed type electrostatic precipitator and working method thereof
CN105396694A (en) * 2015-12-31 2016-03-16 哈尔滨众维豪环保科技有限公司 Integrated dry-and-wet electrostatic dust collector
CN105689132A (en) * 2016-03-11 2016-06-22 浙江信雅达环保工程有限公司 Dry-wet compound electric dust remover
CN106179742A (en) * 2016-08-30 2016-12-07 艾尼科环保技术(安徽)有限公司 A kind of dry and wet compound electrostatic precipitator of band evaporation cooling section
CN107051739A (en) * 2017-05-12 2017-08-18 浙江诸暨骏达环保设备有限公司 A kind of wet electrical dust precipitator
CN107051739B (en) * 2017-05-12 2018-09-25 浙江诸暨骏达环保设备有限公司 A kind of wet electrical dust precipitator
CN110201796A (en) * 2019-06-06 2019-09-06 扬州好管家科技信息咨询有限公司 A kind of gas-liquid separation device for wet electric precipitation

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