CN104628237A - Sludge drying incineration system based on thermal power plant - Google Patents
Sludge drying incineration system based on thermal power plant Download PDFInfo
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- CN104628237A CN104628237A CN201510034560.3A CN201510034560A CN104628237A CN 104628237 A CN104628237 A CN 104628237A CN 201510034560 A CN201510034560 A CN 201510034560A CN 104628237 A CN104628237 A CN 104628237A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/06—Treatment of sludge; Devices therefor by oxidation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/12—Heat utilisation in combustion or incineration of waste
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- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Treatment Of Sludge (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The invention discloses a sludge drying incineration system based on a thermal power plant. The system comprises a sludge drying system and a sludge mixing incineration system, wherein the sludge drying system comprises a heat supply system, a feeding system, a paddle type sludge dryer, a dead steam treating system, a dead steam recycling system and a dried sludge collecting and handling system; and the sludge mixing incineration system comprises a dried sludge mixing system and a dried sludge incineration system. According to the sludge drying incineration system based on the thermal power plant, sludge is dried through high-temperature steam produced by a boiler of the thermal power plant; the dried sludge is incinerated and the resulting heat is used for producing steam; the whole process is free of pollutant; therefore, an effective way is actually developed for recycling the wastes and treating wastes with the wastes, the social and environmental benefits are obvious, and a feasible way is provided for harmless handling, reducing handling and recycling of sludge.
Description
Technical field
The present invention relates to a kind of sludge treating system of field of Environment Protection, specifically a kind of sludge drying and incineration system utilizing heat power plant's steam and boiler of power plant.
Background technology
In recent years, along with the development of Chinese society economy and urbanization, municipal effluent is on the increase, and mud is as the byproduct after sewage disposal, how to process a great problem having become society and faced.According to statistics, to 2010, national urban wastewater treatment firm reaches 2840, the statistic data display of 2013 existing 3600 at present.The year amount of disposing of sewage of these sewage works can reach 344 billion cubic meters.And often process 10,000 tons of sewage and will produce 5 tons of mud, namely the sewage of 344 billion cubic meters probably can produce 20,000,000 tons of mud, but cut-off 2010 years, China's sewage sludge harmlessness processing rate is lower than 25%.
Within 2011, firmly build portion and the Committee of Development and Reform to combine in " the urban wastewater treatment firm specific resistance to filtration technical manual (trying) " printed and distributed and clearly mention " sludge treatment preferentially should utilize local cement or thermoelectricity industry kiln resource ", reduce the construction investment of specific resistance to filtration facility.Wherein, adopt heat power plant's cooperative disposal mud, the steam resource that heat power plant both can have been utilized abundant, as mummification thermal source, can utilize again the existing boiler of heat power plant and advanced exhaust steam treatment system, reduce investment outlay and running cost.
Practice shows, sludge drying is the committed step realizing sewage sludge harmlessness, minimizing and disposal of resources.At present, the mud of sewage work is through mechanical dehydration, and water ratio, generally about 70%, far can not reach the water content requirement of sludge incineration.According to traditional sludge drying granulating system, although water ratio can reach less than 20%, cost is often higher.Therefore, sewage sludge harmlessness process is disposed and is still shouldered heavy responsibilities.
Summary of the invention
Technical problem to be solved by this invention, is just to provide a kind of sludge drying and incineration system relying on heat power plant, for innoxious, the minimizing of mud and disposal of resources provide one not only to meet sludge incineration water content requirement but also lower-cost feasible path.
The present invention solves its technical problem by following technical solution:
A kind of sludge drying and incineration system relying on heat power plant, described heat power plant includes starting trouble and station boiler 1, it is characterized in that: the superheated vapour that described station boiler 1 produces connects steam turbine 2, starting trouble auxiliary steam pipeline and a steam header 3 successively through pipeline, described system comprises paddle type sludge dryer 4 and to the auger type charger of its charging and the finished product mud collection device 6 collecting its finished product mud;
Described paddle type sludge dryer 4 does not directly contact with mud for steam, drying complete after dewatered sludge water ratio about 50% type, its fuselage is distributed with steam inlet, exhaust steam (discharge the steam of heat, major part is condensed into water) outlet, mud import, sludge outlet and mud waste gas outlet:
Described steam inlet is provided with that pipeline connects described steam header 3, exhaust steam outlet is then provided with that pipeline is connected to described water dust scrubber 8 through water pump 10 successively, mud is imported and exported and connected described auger type charger respectively and be provided with pipeline with finished product mud collection device 6, mud waste gas outlet and be connected cyclonic separator 7/ water dust scrubber 8 and described heat power plant station boiler 1 induced draft fan successively, and the outfall of described water dust scrubber 8 is provided with pipeline and is connected to described station boiler 1.
Described system also comprises dewatered sludge and collects and disposal system, it comprise collect drying machine outlet the dewatered sludge storehouse 11 of dewatered sludge, conveying machinery (16) (as power plant's transport trolley), coal yard (13) mixed coal device and coal conveyer belt (14).
Described dewatered sludge is collected and disposal system also comprises power plant coal.
The exhanst gas outlet of existing boiler of power plant 1 has pipeline to be connected to, and power-plant flue gas treatment system 15(comprises that desulfurization is out of stock, flue gas ash removal etc.), the lime-ash outlet of boiler of power plant 1 has conveyer to deliver to cement mill.
High-temperature steam (about 200 DEG C) leads on the pipeline between steam header 3 and manually-operated gate is housed by described starting trouble auxiliary steam pipeline.
Described paddle type sludge dryer 4 fuselage is also provided with three electric thermo-couple temperature measuring points and corresponding thief hole.
Described system comprises sludge drying system and mud blending incineration system;
Described sludge drying system comprises mud in heating system, feed system, paddle type sludge dryer, drying process and produces waste gas recycling system, exhaust steam reutilization system, dewatered sludge collection and disposal system;
Described heating system provides thermal source for paddle type sludge dryer, from starting trouble auxiliary steam pipeline, high-temperature steam (about 200 DEG C) is led to steam header, therebetween manually-operated gate is housed, draws from steam header the steam inlet that steam-pipe is connected to sludge drier respectively.
Described feed system provides undressed mud for paddle type sludge dryer, adopts auger type sludge feeding machine, and by fresh sludge (water ratio more than 90%) continual feeding sludge drier, control inlet amount for convenience, charger rotating speed is adjustable simultaneously.
Described paddle type sludge dryer is the main equipment of sludge drying system, be responsible for fresh sludge mummification to the water ratio required, to proceed from the reality requirement water ratio about 50%, so not only can steam saving but also do not affect the treating processess such as follow-up sludge incineration, this drying machine belongs to contact drying equipment, and steam does not directly contact with mud; Wherein on fuselage except mud and steam are imported and exported, be also provided with three electric thermo-couple temperature measuring points and corresponding thief hole, so that Real-Time Monitoring sludge drying situation, guarantee sludge drier safe and stable operation.
Described waste gas recycling system refers to that the waste gas produced in dewatered sludge process delivers to station boiler induced draft fan by cyclonic separator, water dust scrubber, small-sized fan successively, enter boiler furnace burning disposal with air, the smoke processing system finally by heat power plant is discharged into air;
The exhaust steam major part of described exhaust steam treatment system is condensed into liquid water, because liquid water quality is higher for this reason, can deliver to water dust scrubber recycling through water pump; The sewage that water dust scrubber is discharged simultaneously directly causes boiler furnace upper area combustion by evaporation through pipeline, both ensure that the recycling of high-quality water vapor, and has not produced sewage and germ again.
Described dewatered sludge is collected and disposal system is used for collecting the dewatered sludge of drying machine outlet, and proceed from reality, generally this outlet dewatered sludge can reach the granularity requirements of station boiler to coal dust; If this dewatered sludge does not reach power plant and requires granularity, then need mud to be delivered to power plant coal place and be ground to boiler of power plant desired particle size (only needing rough grinding).
Described mud blending incineration system comprises dewatered sludge blending system, dewatered sludge incineration system:
Described dewatered sludge blending system refers to the qualified mud reached into stove granularity requirements to be transported to coal yard, because mud is larger than coal dust viscosity, easily blocks if be directly sent to coal conveyer belt, so need mud and coal dust in coal yard leading blending by a certain percentage.
Described dewatered sludge incineration system refers to that the good coal dust of blending and mud are delivered to boiler of power plant via the coal conveyer belt of power plant to be burned, the flue gas produced after its burning is discharged into air after the process of power-plant flue gas treatment system, delivers to the second stage employ such as cement mill after its ash collection.
Native system is drawn high-temperature vapor by the starting trouble auxiliary steam pipeline of heat power plant and is entered paddle type sludge dryer, and the mud of water ratio more than 90% sends into sludge drier by auger type charger simultaneously, and wherein steam does not directly contact with mud; Dewatered sludge (water ratio is about 50%) after drying completes is expelled to mud collection device by the sludge outlet on drying machine, then through Steel Ball Coal Mill process, send into thermal power plant boiler with coal conveyer belt after qualified mud delivers to coal yard and coal dust blending by a certain percentage to burn, the flue gas that thermal power plant boiler burning produces is discharged into air after heat power plant's smoke processing system process is qualified, delivers to the second stage employ such as cement mill after its ash collection; The waste gas produced in drying process delivers to boiler induced-draft fan via after cyclonic separator and water dust scrubber process, sends into boiler furnace and participate in burning together with air; The water vapor discharging heat is partially condensated as liquid water, delivers to water dust scrubber recycling through water pump.
The present invention, relative to prior art, has following beneficial effect:
(1) power plant's superior resources (steam, electric power, boiler etc.) can be made full use of, and during by boiler of power plant incineration disposal mud, dewatered sludge water ratio only need be down to about 50% on the one hand, greatly saves expense needed for sludge deep mummification; Boiler hearth temperature is higher on the other hand, and the pathogenic bacteria in mud and objectionable impurities can be made thoroughly to decompose, and its lime-ash can also second stage employ.
(2) without the need to making any change to station boiler, only need at power plant's starting trouble other installation sludge drier, operability is large and front-end investment is less.
(3) native system produces without any pollutent: in drying process and the waste gas that produces of sludge incineration can make full use of the smoke processing system of power plant advanced person, both ensure that the exhaust steam discharge produced in lignin-sludge process reached state-set standard, in turn saved exhaust steam process investment; Washing hydromining water vapor condensation water recycling mode, and the final sewage produced sprays into burner hearth process, neither waste water resource, again can not to environment.
(4) the high-temperature steam dewatered sludge utilizing station boiler to produce, utilizes again the sludge incineration release of heat after mummification to produce steam, opens a cyclic utilization of waste, the effective way of the treatment of wastes with processes of wastes against one another, can produce remarkable environmental benefit.
Accompanying drawing explanation
Fig. 1 is sludge drying system schematic diagram;
Fig. 2 is sludge incinerating system schematic diagram.
In Fig. 1 and Fig. 2, direction shown in arrow is the direction of motion of various material;
In figure, each Reference numeral is expressed as: 1-station boiler, 2-steam turbine, 3-steam header, 4-paddle type sludge dryer, 5-auger type charger, 6-finished product mud collection device, 7-cyclonic separator, 8-water dust scrubber, 9-induced draft fan, 10-water pump, 11-dewatered sludge feed bin, 12-Steel Ball Coal Mill, 13-coal yard, 14-coal conveyer belt, 15-exhaust steam treatment system, 16-mud transport trolley.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is described in further details:
See Fig. 1, for the sludge drying and incineration system embodiment of support heat power plant of the present invention, heat power plant includes starting trouble and station boiler 1, the superheated vapour that station boiler 1 produces connects steam turbine 2, starting trouble auxiliary steam pipeline and a steam header 3 successively through pipeline, (starting trouble auxiliary steam pipeline does not draw).
System comprises paddle type sludge dryer 4 and to the auger type charger of its charging with collect the finished product mud collection device 6 of its finished product mud.
Paddle type sludge dryer 4 does not directly contact with mud for steam, dewatered sludge water ratio after drying completes about 50% type, its fuselage is distributed with steam inlet, exhaust steam exports, mud import, sludge outlet and mud waste gas outlet: described steam inlet is provided with pipeline and is connected described steam header 3, (vapour outlet material is exactly exhaust steam in exhaust steam, some can be condensed into water) outlet is then provided with pipeline successively and is connected to described water dust scrubber 8 through water pump 10, mud is imported and exported and is connected described auger type charger and finished product mud collection device 6 respectively, mud waste gas (be not the same thing with exhaust steam) exports and is provided with pipeline and is connected cyclonic separator 7/ water dust scrubber 8 and described heat power plant station boiler 1 induced draft fan successively, the outfall of described water dust scrubber 8 is provided with pipeline and is connected to described station boiler 1.
See Fig. 2, system also comprises dewatered sludge and collects and disposal system, it comprises the dewatered sludge storehouse 11(of dewatered sludge collecting drying machine outlet and adds power plant coal when coal dust size is defective), conveying machinery (16) (such as power plant's transport trolley, directly be used for delivering to coal yard, in figure, have sign), coal yard (13) mixed coal device and coal conveyer belt (14).
High-temperature steam (about 200 DEG C) leads on the pipeline between steam header 3 and manually-operated gate is housed by starting trouble auxiliary steam pipeline; Paddle type sludge dryer 4 fuselage is also provided with three electric thermo-couple temperature measuring points and corresponding thief hole.
Paddle type sludge dryer 4, usually using the thermal oil after steam or heating as drying medium, adopts indirect mode to heat, and is aided with blade stirring, and wherein blade design has hollow and solid other.
Principle of the present invention is:
As shown in Figure 1, draw high-temperature vapor by starting trouble auxiliary steam pipeline and enter paddle type sludge dryer 4, the mud of water ratio more than 90% sends into sludge drier 4 by auger type charger 5, wherein steam does not directly contact with mud, dewatered sludge (about 50%) after drying completes is expelled to mud collection device 6 by the sludge outlet on drying machine, the waste gas simultaneously produced in drying process delivers to boiler induced-draft fan 9 after processing via cyclonic separator 7 and water dust scrubber 8, sends into boiler furnace and participate in burning together with air; The water vapor major part discharging heat is condensed into liquid water, delivers to water dust scrubber 8 recycle through water pump 10.
As shown in Figure 2, the dewatered sludge in sludge drier 4 exit is sent into boiler furnace with coal conveyer belt 14 after delivering to coal yard 13 and coal dust leading blending by a certain percentage and is burnt, the flue gas produced after its burning is power-plant flue gas treatment system through exhaust steam of electric power plant treatment system 15(, newly do not add thing) process qualified after be discharged into air, deliver to the second stage employ such as cement mill after its ash collection.
Described sludge drying system specifically comprises with lower part:
1, heating system: for paddle type sludge dryer 4 provides thermal source, station boiler 1 produces water vapor, enter steam turbine 2 to do manual work, the steam (about 200 DEG C) that partly does work leads to steam header 3 by starting trouble auxiliary steam pipeline, therebetween manually-operated gate is housed, draws from steam header the steam inlet that steam-pipe is connected to sludge drier 4 respectively.
2, feed system: for paddle type sludge dryer provides fresh sludge, adopts auger type sludge feeding machine 5, and by fresh sludge (water ratio more than 90%) continual feeding sludge drier, control inlet amount for convenience, charger rotating speed is adjustable simultaneously.
3, paddle type sludge dryer: the main equipment of sludge drying system, be responsible for fresh sludge mummification to the water ratio required, to proceed from the reality requirement water ratio about 50%, so not only can steam saving but also do not affect the treating processess such as follow-up sludge incineration, this drying machine belongs to contact drying equipment, and steam does not directly contact with mud.Wherein on fuselage except mud and steam are imported and exported, be also provided with three electric thermo-couple temperature measuring points and corresponding thief hole, so that Real-Time Monitoring sludge drying situation, guarantee sludge drier safe and stable operation.
4, exhaust steam treatment system: the waste gas produced in dewatered sludge process delivers to station boiler induced draft fan 9 by cyclonic separator 7, water dust scrubber 8, small-sized fan successively, enter boiler furnace burning disposal with air, the smoke processing system 15 finally by heat power plant is discharged into air.
5, exhaust steam reutilization system: exothermic water vapor exhaust steam major part is condensed into liquid water, because liquid water quality is higher for this reason, can deliver to water dust scrubber 8 through water pump 10 and recycle.The sewage that water dust scrubber 8 is discharged simultaneously directly causes boiler furnace upper area combustion by evaporation, both ensure that the recycling of high-quality water vapor, and has not produced sewage and pathogenic bacteria again.
6, dewatered sludge is collected and disposal system: the dewatered sludge of drying machine outlet is collected in dewatered sludge storehouse 11, proceeds from reality, and generally this outlet dewatered sludge can reach the granularity requirements of station boiler to coal dust; If this dewatered sludge does not reach power plant and requires granularity, then need mud to be delivered to power plant coal 12 place and be ground to boiler of power plant desired particle size (only needing rough grinding).
Described mud blending incineration system specifically comprises with lower part:
1, dewatered sludge blending system: the qualified mud reached into stove granularity requirements is transported to coal yard 13, with coal dust leading blending by a certain percentage.
2, dewatered sludge incineration system: the coal dust that blending is good and mud are delivered to boiler of power plant via the coal conveyer belt 14 of power plant and burned, the flue gas produced after its burning is discharged into air after exhaust steam of electric power plant treatment system 15 processes, and delivers to the second stage employ such as cement mill after its ash collection.
Claims (6)
1. one kind is relied on the sludge drying and incineration system of heat power plant, described heat power plant includes starting trouble and station boiler (1), it is characterized in that: the superheated vapour that described station boiler (1) produces is provided with steam-pipe and is connected a steam header 3 through steam turbine (2) with starting trouble auxiliary steam pipeline successively, described system comprises paddle type sludge dryer (4) and to the auger type charger of its charging with collect the finished product mud collection device (6) of its finished product mud;
Described paddle type sludge dryer (4) fuselage is distributed with steam inlet, exhaust steam exports, mud import, sludge outlet and mud waste gas outlet: steam inlet is provided with pipeline and is connected described steam header (3), exhaust steam outlet is then provided with pipeline successively and is connected to described water dust scrubber (8) through water pump (10), mud is imported and exported and is connected described auger type charger and finished product mud collection device (6) respectively, mud waste gas outlet is provided with pipeline and connects cyclonic separator (7) successively, water dust scrubber (8) and described heat power plant station boiler (1) induced draft fan, the outfall of described water dust scrubber (8) is provided with pipeline and is connected to described station boiler (1).
2. according to claim 1 support heat power plant sludge drying and incineration system, it is characterized in that: described paddle type sludge dryer (4) for steam directly do not contact with mud, drying complete after dewatered sludge water ratio about 50% type.
3. the sludge drying and incineration system of support heat power plant according to claim 1 and 2, it is characterized in that: described system also comprises dewatered sludge and collects and disposal system, it comprise collect drying machine outlet the dewatered sludge storehouse (11) of dewatered sludge, conveying machinery (16), coal yard (13) mixed coal device and coal conveyer belt (14).
4. the sludge drying and incineration system of support heat power plant according to claim 3, is characterized in that:
Described dewatered sludge is collected and disposal system also comprises power plant coal.
5. according to claim 3 support heat power plant sludge drying and incineration system, it is characterized in that: described starting trouble auxiliary steam pipeline to steam header (3) pipeline between manually-operated gate is housed.
6. the sludge drying and incineration system of support heat power plant according to claim 4, is characterized in that: described paddle type sludge dryer (4) fuselage is provided with three electric thermo-couple temperature measuring points and corresponding thief hole.
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Cited By (10)
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| CN105089722A (en) * | 2015-08-27 | 2015-11-25 | 苏州市江远热电有限责任公司 | Sludge drying power generating system and method |
| CN105114963A (en) * | 2015-09-30 | 2015-12-02 | 上海市城市建设设计研究总院 | Conveying system for dried sludge |
| CN105157042A (en) * | 2015-09-30 | 2015-12-16 | 上海市城市建设设计研究总院 | Conveying system and processing method for powder granule sludge |
| CN105180176A (en) * | 2015-09-30 | 2015-12-23 | 上海市城市建设设计研究总院 | Dried sludge conveying system with wind distribution branch and treatment method |
| CN107013928A (en) * | 2017-05-19 | 2017-08-04 | 重庆三峰卡万塔环境产业有限公司 | A kind of method and system of grate furnace waste incineration cooperatively processing sludge |
| CN107351239A (en) * | 2017-08-26 | 2017-11-17 | 汕头市宏基混凝土构件有限公司 | A kind of method using steam power plant's steam production PHC pile tubes |
| CN108579138A (en) * | 2018-05-17 | 2018-09-28 | 武红亮 | A kind of novel peripheral drive sludge scraper |
| CN111233290A (en) * | 2020-01-23 | 2020-06-05 | 重庆市渝西水务有限公司 | Sludge treatment system for sewage treatment plant |
| CN111623896A (en) * | 2020-05-24 | 2020-09-04 | 西安交通大学 | Supercritical water on-line flow testing device |
| CN112443849A (en) * | 2020-11-20 | 2021-03-05 | 安徽国祯生态科技有限公司 | Biomass power plant coupling sludge drying incineration method |
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| CN107013928A (en) * | 2017-05-19 | 2017-08-04 | 重庆三峰卡万塔环境产业有限公司 | A kind of method and system of grate furnace waste incineration cooperatively processing sludge |
| CN107351239A (en) * | 2017-08-26 | 2017-11-17 | 汕头市宏基混凝土构件有限公司 | A kind of method using steam power plant's steam production PHC pile tubes |
| CN108579138A (en) * | 2018-05-17 | 2018-09-28 | 武红亮 | A kind of novel peripheral drive sludge scraper |
| CN111233290A (en) * | 2020-01-23 | 2020-06-05 | 重庆市渝西水务有限公司 | Sludge treatment system for sewage treatment plant |
| CN111623896A (en) * | 2020-05-24 | 2020-09-04 | 西安交通大学 | Supercritical water on-line flow testing device |
| CN111623896B (en) * | 2020-05-24 | 2021-11-16 | 西安交通大学 | Supercritical water on-line flow testing device |
| CN112443849A (en) * | 2020-11-20 | 2021-03-05 | 安徽国祯生态科技有限公司 | Biomass power plant coupling sludge drying incineration method |
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