CN105311947A - Boiler fume denitration and desulfuration dedusting device and process - Google Patents
Boiler fume denitration and desulfuration dedusting device and process Download PDFInfo
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- CN105311947A CN105311947A CN201510902139.XA CN201510902139A CN105311947A CN 105311947 A CN105311947 A CN 105311947A CN 201510902139 A CN201510902139 A CN 201510902139A CN 105311947 A CN105311947 A CN 105311947A
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- pollution control
- rotating bed
- gravity rotating
- control device
- bed pollution
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- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 15
- 238000000034 method Methods 0.000 title claims abstract description 15
- 239000003517 fume Substances 0.000 title abstract 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 26
- 238000010521 absorption reaction Methods 0.000 claims abstract description 25
- 239000007788 liquid Substances 0.000 claims abstract description 24
- 210000002381 Plasma Anatomy 0.000 claims abstract description 19
- 239000010865 sewage Substances 0.000 claims abstract description 10
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical class S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 claims abstract description 9
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 claims description 40
- 239000000779 smoke Substances 0.000 claims description 26
- UGFAIRIUMAVXCW-UHFFFAOYSA-N carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 20
- 239000003546 flue gas Substances 0.000 claims description 20
- GQPLMRYTRLFLPF-UHFFFAOYSA-N nitrous Oxide Chemical compound [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 claims description 19
- HEMHJVSKTPXQMS-UHFFFAOYSA-M sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 18
- 229910052813 nitrogen oxide Inorganic materials 0.000 claims description 17
- 230000003009 desulfurizing Effects 0.000 claims description 14
- 238000007254 oxidation reaction Methods 0.000 claims description 14
- 238000000605 extraction Methods 0.000 claims description 10
- 239000002245 particle Substances 0.000 claims description 8
- 238000000197 pyrolysis Methods 0.000 claims description 8
- RAHZWNYVWXNFOC-UHFFFAOYSA-N sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 claims description 8
- 239000000428 dust Substances 0.000 claims description 7
- 239000007800 oxidant agent Substances 0.000 claims description 6
- 230000000391 smoking Effects 0.000 claims description 5
- TUJKJAMUKRIRHC-UHFFFAOYSA-N hydroxyl radical Chemical compound [OH] TUJKJAMUKRIRHC-UHFFFAOYSA-N 0.000 claims description 3
- 230000003647 oxidation Effects 0.000 claims description 3
- 239000002250 absorbent Substances 0.000 claims description 2
- 230000002745 absorbent Effects 0.000 claims description 2
- 230000001590 oxidative Effects 0.000 claims description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 abstract description 13
- 239000003054 catalyst Substances 0.000 abstract description 5
- 239000007787 solid Substances 0.000 abstract description 4
- 239000002912 waste gas Substances 0.000 abstract description 3
- 239000002351 wastewater Substances 0.000 abstract description 3
- 238000007599 discharging Methods 0.000 abstract 2
- 238000000746 purification Methods 0.000 abstract 2
- 229910052815 sulfur oxide Inorganic materials 0.000 abstract 1
- 239000002699 waste material Substances 0.000 abstract 1
- XSQUKJJJFZCRTK-UHFFFAOYSA-N urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- WFPZPJSADLPSON-UHFFFAOYSA-N Dinitrogen tetroxide Chemical compound [O-][N+](=O)[N+]([O-])=O WFPZPJSADLPSON-UHFFFAOYSA-N 0.000 description 2
- 208000001034 Frostbite Diseases 0.000 description 2
- 239000004202 carbamide Substances 0.000 description 2
- 238000000151 deposition Methods 0.000 description 2
- 239000003500 flue dust Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- JCXJVPUVTGWSNB-UHFFFAOYSA-N nitrogen dioxide Chemical compound O=[N]=O JCXJVPUVTGWSNB-UHFFFAOYSA-N 0.000 description 2
- 230000000607 poisoning Effects 0.000 description 2
- 231100000572 poisoning Toxicity 0.000 description 2
- 150000003254 radicals Chemical class 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 229910002089 NOx Inorganic materials 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- YPJKMVATUPSWOH-UHFFFAOYSA-N nitrooxidanyl Chemical compound [O][N+]([O-])=O YPJKMVATUPSWOH-UHFFFAOYSA-N 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 150000003462 sulfoxides Chemical class 0.000 description 1
Classifications
-
- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Abstract
The invention discloses a boiler fume denitration and desulfuration dedusting device and process. The device comprises a supergravity rotation bed pollution control device I, wherein the air inlet of the supergravity rotation bed pollution control device I is connected with the fume outlet of a boiler; the alkaline absorption liquid adding opening of the supergravity rotation bed pollution control device I is connected with an alkaline absorption liquid circulation water pool; the sewage discharging opening of the supergravity rotation bed pollution control device I is connected with the alkaline absorption liquid circulation water pool; the supergravity rotation bed pollution control device I is connected with a low-temperature plasma purification device; and the low-temperature plasma purification device is connected with a supergravity rotation bed pollution control device II. By using the scheme, the structure design is reasonable, waste water, waste gas and waste solids are not generated, the ammonia escape is avoided, the environment protection is realized, no catalyst is used, the dependence on ammonia is avoided, certain safety problems generated in use of ammonia are thoroughly avoided, the efficiency of removing fume particulate matters, sulfur oxides and nitric oxides is high, and the stable standard discharging is realized.
Description
Technical field:
The present invention relates to a kind of denitration of boiler smoke, desulfation dust-extraction device and technique.
Background technology:
Harmful substance in boiler smoke is flue dust, SO mainly
2and NOx, what desulfurization and dedusting tradition adopted is bag-type dust+desulfurizing tower, and SR is large, and operating cost is high, and treatment effect is unstable, and maintenance cost is high, and can not denitration simultaneously.Denitration generally adopts SCR and SNCR, SNCR method i.e. SNCR method at present, and its primary raw material is urea, and existing problems are: denitration efficiency is low, is less than 50%, and the escaping of ammonia is serious, affects surrounding enviroment and affects boiler efficiency; SCR method i.e. selective catalytic reduction, its primary raw material is urea.Existing problems are: denitration efficiency is low, 60-80%, and catalyst easily blocks, and flue dust affects catalyst life, and the escaping of ammonia is serious, has corrosion, affects surrounding enviroment.
Summary of the invention:
The present invention is in order to make up the deficiencies in the prior art, provide a kind of denitration of boiler smoke, desulfation dust-extraction device and technique, produce without waste water, waste gas and useless solids, without the escaping of ammonia phenomenon, environment-friendly and green, do not use catalyst, do not rely on ammonia, some safety problems in ammonia use are thoroughly stopped, as liquefied ammonia reveals poisoning, the frostbite, blast etc. caused, remove flue gas particles, oxysulfide and nitrogen oxide efficiency high, stably reaching standard discharge can be realized, solve problems of the prior art.
The present invention for solving the problems of the technologies described above adopted technical scheme is:
A kind of denitration of boiler smoke, desulfation dust-extraction device, comprise a high-gravity rotating bed pollution control device, a high-gravity rotating bed pollution control device air inlet is connected by pipeline with boiler flue gas outlet, the alkaline absorption solution of a high-gravity rotating bed pollution control device is added entrance and is connected with alkaline absorption solution circulating water pool by a water circulating pump, a high-gravity rotating bed pollution control device sewage draining exit is connected with alkaline absorption solution circulating water pool, a high-gravity rotating bed pollution control device air outlet is connected with the air inlet of low temp plasma purifier, the air outlet of low temp plasma purifier is connected with the air inlet of No. two high-gravity rotating bed pollution control devices, the nox adsorption liquid of No. two high-gravity rotating bed pollution control devices is added entrance and is connected with nox adsorption liquid circulating water pool by No. two water circulating pumps, the sewage draining exit of No. two high-gravity rotating bed pollution control devices is connected with nox adsorption liquid circulating water pool, the air outlet of No. two high-gravity rotating bed pollution control devices is connected with smoking blower fan.
Use the denitration of boiler smoke of above-mentioned denitration of boiler smoke, desulfation dust-extraction device, desulfurization dust-removing technique, comprise the following steps:
(1) desulfurization and dedusting: boiler smoke enters a high-gravity rotating bed pollution control device and fully mixes with the alkaline absorption solution in a high-gravity rotating bed pollution control device and contact, and removes particle and oxysulfide;
(2) pyrolysis oxidization: the flue gas removed after particle and oxysulfide enters low temp plasma purifier, oxidation of nitric oxide water-fast in nitrogen oxide, by saturated with moisture, nitrogen oxide pyrolysis oxidization, is risen valency and becomes high price nitrogen oxide by the high energy electron produced by discharge of plasma in low temperature and strong oxidizer hydroxyl radical free radical;
(3) oxidative absorption: the flue gas of pyrolysis oxidization enters No. two high-gravity rotating bed pollution control devices, the strong oxidizer that in step (2), low temperature plasma produces together enters No. two high-gravity rotating bed pollution control devices in company with flue gas to be continued and flue gas oxidation reaction, the nox adsorption liquid injected to No. two high-gravity rotating bed pollution control devices absorbs higher-priced nitrogen oxide, removes nitrogen oxides in effluent.
In described step (1), first boiler smoke temperature is down to less than 150 DEG C, and then carries out desulfurization and dedusting.
Described alkaline absorption solution is NaOH.
Described nox adsorption liquid is NaOH.
Described boiler smoke intake is 50000m
3/ h, and described kind of dust is 450mg/m
3, sulfur dioxide concentration is 1800mg/m
3, nitrous oxides concentration is 900mg/m
3time, the alkaline absorbent flow quantity of pH value 10 ~ 12 used is 15m
3/ h, consumption is 6kg/h, and the nox adsorption flow quantity of pH value 10 ~ 12 is 10m
3/ h, consumption is 4kg/h.
The present invention adopts such scheme, reasonable in design, produce without waste water, waste gas and useless solids, without the escaping of ammonia phenomenon, environment-friendly and green, do not use catalyst, do not rely on ammonia, thoroughly stopped ammonia use in some safety problems, as liquefied ammonia reveals poisoning, the frostbite, blast etc. caused, remove flue gas particles, oxysulfide and nitrogen oxide efficiency high, stably reaching standard discharge can be realized.
Accompanying drawing illustrates:
Fig. 1 is the structural representation of denitration of boiler smoke of the present invention, desulfation dust-extraction device.
In figure, 1, a high-gravity rotating bed pollution control device, 2, high-gravity rotating bed pollution control device air inlet, 3, alkaline absorption solution adds entrance, 4, a water circulating pump, 5, a high-gravity rotating bed pollution control device sewage draining exit, 6, high-gravity rotating bed pollution control device air outlet, 7, low temp plasma purifier, 8, No. two high-gravity rotating bed pollution control devices, 9, nox adsorption liquid adds entrance, 10, No. two water circulating pumps, and 11, smoking blower fan.
Detailed description of the invention:
For clearly demonstrating the technical characterstic of this programme, below by detailed description of the invention, and in conjunction with its accompanying drawing, the present invention will be described in detail.
As shown in Figure 1, a kind of denitration of boiler smoke, desulfation dust-extraction device, comprise a high-gravity rotating bed pollution control device 1, a high-gravity rotating bed pollution control device air inlet 2 is connected by pipeline with boiler flue gas outlet, the alkaline absorption solution of a high-gravity rotating bed pollution control device 1 is added entrance 3 and is connected with alkaline absorption solution circulating water pool by a water circulating pump 4, a high-gravity rotating bed pollution control device sewage draining exit 5 is connected with alkaline absorption solution circulating water pool, a high-gravity rotating bed pollution control device air outlet 6 is connected with the air inlet of low temp plasma purifier 7, the air outlet of low temp plasma purifier 7 is connected with the air inlet of No. two high-gravity rotating bed pollution control devices 8, the nox adsorption liquid of No. two high-gravity rotating bed pollution control devices 8 is added entrance 9 and is connected with nox adsorption liquid circulating water pool by No. two water circulating pumps 10, the sewage draining exit of No. two high-gravity rotating bed pollution control devices 8 is connected with nox adsorption liquid circulating water pool, the air outlet of No. two high-gravity rotating bed pollution control devices 8 is connected with smoking blower fan 11.
Use the denitration of boiler smoke of above-mentioned denitration of boiler smoke, desulfation dust-extraction device, desulfurization dust-removing technique process as follows: being cooled to after below 150 DEG C through cooling process from boiler flue gas out and entering a high-gravity rotating bed pollution control device 1 through a high-gravity rotating bed pollution control device air inlet 2, take kind of dust as 450mg/m
3, sulfur dioxide concentration is 1800mg/m
3, nitrous oxides concentration is 900mg/m
3, boiler smoke intake is 50000m
3/ h is example, and add through a water circulating pump 4 and alkaline absorption solution entrance 3 to add alkaline absorption solution from pH value 10 ~ 12 to a high-gravity rotating bed pollution control device 1, flow is 15m
3/ h, alkaline absorption solution can select NaOH, utilizes the effect of hypergravity to make gas, liquid, solid three fully mix contact, and reach and remove particle dust and oxysulfide object in flue gas, alkaline absorption solution consumption is 6kg/h.Absorb saturated alkaline absorption solution and enter circulating water pool by a high-gravity rotating bed pollution control device sewage draining exit 5, after filtering-depositing, reuse.
Remove after the flue gas after particle and oxysulfide is discharged by a high-gravity rotating bed pollution control device air outlet 6 and enter low temp plasma purifier 7, the high energy electron produced by discharge of plasma in low temperature and strong oxidizer hydroxyl radical free radical are by saturated with moisture, nitrogen oxide pyrolysis oxidization, oxidation of nitric oxide water-fast in nitrogen oxide is risen valency and becomes high price nitrogen oxide, as: nitrogen dioxide, nitrogen trioxide, dinitrogen tetroxide etc.
The flue gas of pyrolysis oxidization enters No. two high-gravity rotating bed pollution control devices 8 after the air outlet of low temp plasma purifier 7 is discharged, the strong oxidizer that low temperature plasma produces together enters No. two high-gravity rotating bed pollution control devices 8 in company with flue gas to be continued and flue gas oxidation reaction, add through No. two water circulating pumps 10 and nox adsorption liquid entrance 9 to inject nox adsorption liquid from pH value 10 ~ 12 to No. two high-gravity rotating bed pollution control devices 8, flow is 10m
3/ h, nox adsorption liquid can select NaOH, and under the effect of hypergravity, make gas-liquid two-phase fully mix contact absorption risen the high price nitrogen oxide of valency, remove nitrogen oxides in effluent, nox adsorption liquid consumption is 4kg/h.Absorb saturated nox adsorption liquid and enter circulating water pool by the sewage draining exit of No. two high-gravity rotating bed pollution control devices 8, after filtering-depositing, reuse.Flue gas after denitration, desulfurization and dedusting is qualified discharge air under the blast of smoking blower fan.
The running temperature interval of apparatus of the present invention can between 30 DEG C to 150 DEG C, energy smoke treatment air quantity 3000 ~ 100000m
3/ h, dust concentration 1500 ~ 100mg/m
3, sulfoxide concentration 1500 ~ 100mg/m
3, nitrous oxides concentration 10000 ~ 100mg/m
3.Can by dust concentration from 1500mg/m
3be down to 5mg/m
3within, nitrous oxides concentration can from 10000mg/m
3be down to 50mg/m
3within, sulfur dioxide concentration can from 1500mg/m
3be down to 30mg/m
3within.
The present invention does not describe part in detail, is the known technology of those skilled in the art of the present technique.
Claims (6)
1. a denitration of boiler smoke, desulfation dust-extraction device, it is characterized in that: comprise a high-gravity rotating bed pollution control device, a high-gravity rotating bed pollution control device air inlet is connected by pipeline with boiler flue gas outlet, the alkaline absorption solution of a high-gravity rotating bed pollution control device is added entrance and is connected with alkaline absorption solution circulating water pool by a water circulating pump, a high-gravity rotating bed pollution control device sewage draining exit is connected with alkaline absorption solution circulating water pool, a high-gravity rotating bed pollution control device air outlet is connected with the air inlet of low temp plasma purifier, the air outlet of low temp plasma purifier is connected with the air inlet of No. two high-gravity rotating bed pollution control devices, the nox adsorption liquid of No. two high-gravity rotating bed pollution control devices is added entrance and is connected with nox adsorption liquid circulating water pool by No. two water circulating pumps, the sewage draining exit of No. two high-gravity rotating bed pollution control devices is connected with nox adsorption liquid circulating water pool, the air outlet of No. two high-gravity rotating bed pollution control devices is connected with smoking blower fan.
2. use denitration of boiler smoke, the denitration of boiler smoke of desulfation dust-extraction device, desulfurization dust-removing technique described in claim 1, it is characterized in that: comprise the following steps:
(1) desulfurization and dedusting: boiler smoke enters a high-gravity rotating bed pollution control device and fully mixes with the alkaline absorption solution in a high-gravity rotating bed pollution control device and contact, and removes particle and oxysulfide;
(2) pyrolysis oxidization: the flue gas removed after particle and oxysulfide enters low temp plasma purifier, oxidation of nitric oxide water-fast in nitrogen oxide, by saturated with moisture, nitrogen oxide pyrolysis oxidization, is risen valency and becomes high price nitrogen oxide by the high energy electron produced by discharge of plasma in low temperature and strong oxidizer hydroxyl radical free radical;
(3) oxidative absorption: the flue gas of pyrolysis oxidization enters No. two high-gravity rotating bed pollution control devices, the strong oxidizer that in step (2), low temperature plasma produces together enters No. two high-gravity rotating bed pollution control devices in company with flue gas to be continued and flue gas oxidation reaction, the nox adsorption liquid injected to No. two high-gravity rotating bed pollution control devices absorbs higher-priced nitrogen oxide, removes nitrogen oxides in effluent.
3. denitration of boiler smoke according to claim 2, desulfurization dust-removing technique, is characterized in that: in described step (1), first boiler smoke temperature is down to less than 150 DEG C, and then carries out desulfurization and dedusting.
4. denitration of boiler smoke according to claim 2, desulfurization dust-removing technique, is characterized in that: described alkaline absorption solution is NaOH.
5. denitration of boiler smoke according to claim 2, desulfurization dust-removing technique, is characterized in that: described nox adsorption liquid is NaOH.
6. denitration of boiler smoke according to claim 2, desulfurization dust-removing technique, is characterized in that: described boiler smoke intake is 50000m
3/ h, and described kind of dust is 450mg/m
3, sulfur dioxide concentration is 1800mg/m
3, nitrous oxides concentration is 900mg/m
3time, the alkaline absorbent flow quantity of pH value 10 ~ 12 used is 15m
3/ h, consumption is 6kg/h, and the nox adsorption flow quantity of pH value 10 ~ 12 is 10m
3/ h, consumption is 4kg/h.
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CN201510902139.XA CN105311947A (en) | 2015-12-08 | 2015-12-08 | Boiler fume denitration and desulfuration dedusting device and process |
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CN201510902139.XA CN105311947A (en) | 2015-12-08 | 2015-12-08 | Boiler fume denitration and desulfuration dedusting device and process |
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CN201510902139.XA Pending CN105311947A (en) | 2015-12-08 | 2015-12-08 | Boiler fume denitration and desulfuration dedusting device and process |
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Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106016313A (en) * | 2016-05-10 | 2016-10-12 | 海宁马桥大都市热电有限公司 | Low-emission environment-friendly boiler |
CN106268163A (en) * | 2016-08-17 | 2017-01-04 | 厦门口水网络有限公司 | The device of hypergravity coupled low temperature plasma technology purifying oil fume |
CN107311714A (en) * | 2017-04-27 | 2017-11-03 | 上海秀特化工科技有限公司 | A kind of hypergravity is electrolysed sylvite desulphurization denitration multi-component composite fertilizer processing method |
WO2018192446A1 (en) * | 2017-04-18 | 2018-10-25 | 北京化工大学 | Gas-phase oxidation/decomposition and absorption integrated device and application thereof |
US11491441B2 (en) | 2017-06-16 | 2022-11-08 | Chevron U.S.A. Inc. | Methods and systems for removing contaminants from flue gas on a ship or offshore floating vessel using a rotating packed bed device |
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CN106016313A (en) * | 2016-05-10 | 2016-10-12 | 海宁马桥大都市热电有限公司 | Low-emission environment-friendly boiler |
CN106016313B (en) * | 2016-05-10 | 2018-01-30 | 海宁马桥大都市热电有限公司 | Low emission environment-protection boiler |
CN106268163A (en) * | 2016-08-17 | 2017-01-04 | 厦门口水网络有限公司 | The device of hypergravity coupled low temperature plasma technology purifying oil fume |
WO2018192446A1 (en) * | 2017-04-18 | 2018-10-25 | 北京化工大学 | Gas-phase oxidation/decomposition and absorption integrated device and application thereof |
CN107311714A (en) * | 2017-04-27 | 2017-11-03 | 上海秀特化工科技有限公司 | A kind of hypergravity is electrolysed sylvite desulphurization denitration multi-component composite fertilizer processing method |
US11491441B2 (en) | 2017-06-16 | 2022-11-08 | Chevron U.S.A. Inc. | Methods and systems for removing contaminants from flue gas on a ship or offshore floating vessel using a rotating packed bed device |
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