CN105233671A - Glass furnace high-temperature flue gas high-efficiency dust-removing denitration system - Google Patents
Glass furnace high-temperature flue gas high-efficiency dust-removing denitration system Download PDFInfo
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- CN105233671A CN105233671A CN201510710351.6A CN201510710351A CN105233671A CN 105233671 A CN105233671 A CN 105233671A CN 201510710351 A CN201510710351 A CN 201510710351A CN 105233671 A CN105233671 A CN 105233671A
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- flue gas
- dust
- glass kiln
- temperature flue
- denitrating system
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Abstract
The invention relates to a glass furnace high-temperature flue gas high-efficiency dust-removing denitration system. The system comprises the sequentially communicated components of a conditioning agent feeding device, a dust-removing device and a catalytic reduction device. The conditioning agent feeding device communicates with the glass furnace through a flue gas pipe. The catalytic reduction device communicates with an induced draft fan. According to the invention, a dry-method flue gas conditioning and mixing system is used in combination with a high-temperature electrostatic precipitator. Glass furnace flue gas characteristics are regulated through a flue gas conditioning device, such that the dust removing effect in the subsequent high-temperature electrostatic precipitator is enhanced. Therefore, catalyst service life is further prolonged, glass furnace flue gas NOx pollutant discharge is reduced, and a purpose of high-efficiency dust-removing and denitration is achieved. With the system, a powerful guarantee is provided for long-term normal operation of the denitration system.
Description
Technical field
The present invention relates to a kind of industrial waste gas treatment system, be specifically related to a kind of glass kiln high-temperature flue gas high-effective dust-removing denitrating system.
Background technology
Glass industry is big power consumer, is again simultaneously the serious industry of atmosphere pollution.Glass furnace adopts heavy oil, natural gas and coal etc. to be fuel, and Air Pollutant Emission is relatively more serious, and also cause great harm to environment and the mankind, therefore, glass industry is one of China's priority industry Environmental capacity industry.With regard to glass industry, the SO of the pollutant in atmosphere pollution mainly in glass furnace fume
2, NO
xand dust etc.Compared to coal-fired boiler in power plant waste gas, the waste gas of glass kiln has its particularity: comprise that flue-gas temperature is higher, exhaust gas volumn is less, and pollutant component is complicated etc.In the glass enterprise of China, because quite a few enterprise adopts oil, petroleum coke etc. as fuel, the dust in its combustion product gases has stronger corrosivity and adhesiveness; Meanwhile, due in glass batch containing have an appointment 18% soda ash and a small amount of saltcake and other alkali metal containing, alkali earth metal raw material, when batch enters kiln, have fraction raw material to be vaporized, enter in flue gas in company with combustion product; Make flue gas of glass melting furnace composition more complicated, adhesiveness, the chemical corrosivity of flue dust are stronger.China's glass production line quantity is a lot, only have the glass production enterprise of small part producer that kiln gas abatement equipment has been installed, major part glass kiln flue gas directly discharges without desulfur denitrate dust collecting process, and particularly the denitration technology application of glass kiln is just in the starting stage.Thus, comprehensive regulation glass furnace fume being carried out to pollutant is needed.
Summary of the invention
In order to overcome the defect that prior art exists, in order to reduce dust adhesion, improve particle removal efficiency and ensure hot electrostatic precipitator, SCR denitration system parallel-adder settle-out time, the invention provides a kind of glass kiln high-temperature flue gas high-effective dust-removing denitrating system, the present invention regulates glass kiln exhaust gas dust characteristic by flue gas conditioning device, with removing of dust in strengthening subsequent high temperature electrostatic deduster, thus the service life of further extending catalyst, reduce glass furnace flue gas NO
xthe discharge of pollutant, reaches the object of high-effective dust-removing and denitration.
A kind of glass kiln high-temperature flue gas high-effective dust-removing denitrating system, described system comprises the adjusting material charging gear, dust arrester and the catalytic reduction device that are communicated with in turn, described adjusting material charging gear is connected with glass kiln by flue, and described catalytic reduction device is connected with air-introduced machine.
As preferably, described flue is provided with the first flashboard; Described glass kiln is connected with air-introduced machine by bypass flue, and described bypass flue is provided with the second flashboard.
As preferably, described system also comprises the modified mixing arrangement of dry method flue gas, and the modified mixing arrangement of described dry method flue gas is arranged between adjusting material charging gear and dust arrester.
As preferably, the first flashboard is arranged on the flue between adjusting material charging gear and the modified mixing arrangement of dry method flue gas.
As preferably, described dust arrester is electrostatic precipitator, and catalytic reduction device is SCR reactor.
As preferably, be laid with ammonia water spray device before described SCR reactor, the soot blower being provided with packed catalyst device in SCR reactor and being arranged on above packed catalyst device.Catalyst in SCR reactor is integral honeycombed catalyst, and select the catalyst structure of coarse pitch, lower individual layer height, main active component is V
2o
5-WO
3/ TiO
2, adopt TiO
2make framework material, by V
2o
5-WO
3and TiO
2extruded after mixing.Soot blower adopts pressure-air to purge.
As preferably, adjusting material selects Cabase compound, and described Cabase compound particle diameter is 48 ~ 80 μm.
As preferably, described electrostatic precipitator comprises housing, positive plate, cathode line, insulated porcelain sleeve, ash bucket, hot air sweeping device, rapping apparatus and high-low pressure control device, described electrostatic precipitator adopts the board-like layout of line, line distance between plates is set to 300 ~ 500mm, polar curve spacing is set to 100 ~ 300mm, polar curve adopts the parallel four tooth prickle wires arranged, flow control is at 0.5m/s ~ 0.8m/s.Make uniform distribution of temperature field, thus ensure equally distributed corona discharge current.
As preferably, described insulated porcelain sleeve adopts Corundum Ceramics to be material, and three inclination clean-out hatch are offered in insulated porcelain sleeve upper end, and insulated porcelain sleeve lower end is arranged all presses dust cover.Be displaced downwardly to by maximum field strength and all press dust cover place, control section flow velocity is 0.5m/s, to suppress the intrusion of dust.
As preferably, the ash bucket of electrostatic precipitator lower end adopts electrical heat tracing, and control temperature is at 150 DEG C.Prevent the problem of the felt jam that dust causes because of condensation or absorption moisture content in ash bucket.
Due to the special nature of the high-temperature flue gas that glass kiln produces, in order to ensure the Effec-tive Function of the SCR denitration system that flue gas is follow-up, the present invention carries out exhaust gas dust and removes before SCR, selects high-temperature electric dedusting to carry out exhaust gas dust and removes.And based on the special nature of glass kiln dust, the characteristic such as ratio resistance, adhesiveness of the present invention to dust regulates, prevent dust adhesion from polar curve pole plate, causing accumulation, thus carry out modified to flue gas, the function of flue gas conditioning is not only adjustment Dust Characteristics, changes the characteristic such as dust adhesion, ratio resistance, can also increase granule density to improve space charge, increase mean particle size, reduce flue gas acid dew point etc.
The present invention adopts the modified hybrid system of dry method flue gas to coordinate the coupling of high temperature electrostatic deduster, strengthens removal effect glass kiln flue gas height being adhered to dust, for ensureing that long-term normal operation the in follow-up SCR catalyst service life and denitrating system provides powerful guarantee.
When the present invention uses: glass kiln high-temperature flue gas out to regulate ratio resistance and the adhesiveness of dust, to reach the character being beneficial to electrostatic precipitator and removing, reaches pre-desulfurized effect at about 400 DEG C access dry method flue gas tempering systems simultaneously.After exhaust gas dust is modified, flue-gas temperature is 350 ~ 400 DEG C, then enters high temperature electrostatic deduster and carries out exhaust gas dust and remove.Flue gas removes after dust through deduster, enters SCR denitration reactor and carries out removing of nitrogen oxide, and SCR reactor output is provided with air-introduced machine and the flue gas after purification is entered upstream device.
Beneficial effect of the present invention is:
(1) dry method flue gas tempering system, effectively can improve flue gas of glass melting furnace flue dust character, reduce its adhesiveness and corrosivity, for the normal operation of hot electrostatic precipitator and efficiency of dust collection provide powerful guarantee, ensure that high activity and comparatively long life of follow-up SCR denitration, reduce catalyst use cost, and flue gas is after dust removal process, the smoke content entering SCR reactor reduces greatly, the frequency of utilization of catalyst soot blower can be reduced, reduce system power consumption, save operating cost;
(2) adopt Cabase compound to be modified reagent, ratio resistance and the adhesiveness of dust granules can be regulated, improve subsequent high temperature electrostatic precipitator removal efficiency; The effect of pre-desulfurization can be played simultaneously, alleviate the desulfurization pressure of follow-up desulfurizer, save operating cost; And having with low cost, product is easy to the features such as transmission and collection;
(3) high temperature electrostatic deduster is adopted, dust granules in efficient removal high-temperature flue gas, greatly reduce the dust content entering SCR denitration system, improve the service life of denitrating catalyst, prevent blocking and the corrosion of dust, for the Effec-tive Function of follow-up SCR denitration system provides powerful guarantee;
(4) flue gas conditioning associating high temperature electrostatic dedusting and SCR denitration system, the dust granules in efficient removal high-temperature flue gas and nitrogen oxide, reach the object of Collaborative Control nitrogen oxide and dust emission.
Accompanying drawing explanation
Fig. 1 is the structural representation of the embodiment of the present invention 1;
Fig. 2 is the structural representation of the embodiment of the present invention 2;
Fig. 3 is the structural representation of high temperature electrostatic deduster of the present invention;
Fig. 4 is the structural representation of the insulated porcelain sleeve of high temperature electrostatic deduster of the present invention.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the invention will be further described, but invention which is intended to be protected is not limited to this.
Embodiment 1
With reference to Fig. 1, a kind of glass kiln high-temperature flue gas high-effective dust-removing denitrating system, described system comprises the adjusting material charging gear 2, dust arrester 4 and the catalytic reduction device 6 that are communicated with in turn, described adjusting material charging gear 2 is connected with glass kiln by flue 1, described catalytic reduction device 6 is connected with air-introduced machine 9, and the flue gas after purification is entered upstream device.Described dust arrester 4 is high temperature electrostatic deduster, to remove alkali metal particles thing in glass kiln flue gas and other causes the dust of adverse effect to follow-up denitrating catalyst, thus guarantees the stable operation reliably and with long-term of glass kiln flue gas SCR denitration system; Catalytic reduction device 6 is SCR reactor.Adjusting material charging gear adopts pressurized with compressed air to spray modified reagent, and adjusting material selects Cabase compound, and described Cabase compound particle diameter is 48 ~ 80 μm.Described flue 1 is provided with the first flashboard 10, and flue gas removes after dust through hot electrostatic precipitator 4 and enters SCR reactor 6 by pipeline; Described glass kiln is connected with air-introduced machine 9 by bypass flue, and described bypass flue is provided with the second flashboard 11.
Described system also comprises the modified mixing arrangement 3 of dry method flue gas, the modified mixing arrangement 3 of described dry method flue gas is arranged between adjusting material charging gear 2 and high temperature electrostatic deduster 4, and the first flashboard 10 is arranged on the flue between adjusting material charging gear 2 and the modified mixing arrangement 3 of dry method flue gas.The flue gas of glass kiln is fully mixed by the modified mixing arrangement 3 of dry method flue gas with the adjusting material sprayed into, and by adhesiveness and the ratio resistance characteristic of the modified improved effect exhaust gas dust of particle, dust is reached be beneficial to the character that high temperature electrostatic deduster removes.Meanwhile, also play the object of a pre-desulfurization, by SO
xdeng the reactive adsorption of sour gas, play the effect of the SCR catalyst of protection deduster rear end.
The soot blower 7 being provided with the above catalyst 8 of one deck and being arranged on above catalyst 8 is laid with in ammonia water spray device 5, SCR reactor 1 before described SCR reactor 6.Catalyst in SCR reactor 6 is integral honeycombed catalyst, and select the catalyst structure of coarse pitch, lower individual layer height, main active component is V
2o
5-WO
3/ TiO
2, adopt TiO
2make framework material, by V
2o
5-WO
3and TiO
2extruded after mixing; Soot blower adopts pressure-air to purge.
With reference to Fig. 3, described high temperature electrostatic deduster 4 comprises housing 101, positive plate 102, cathode line 103, insulated porcelain sleeve 104, hot air sweeping device 105, ash bucket 106 and rapping apparatus, high-low pressure control device etc., described high temperature electrostatic deduster 4 adopts the board-like layout of line, the high temperature thermal deformation problem of pole plate polar curve is taken into full account during design, polar curve pole plate all adopts high temperature resistant 310S stainless steel, line distance between plates is set to 400mm, polar curve spacing is set to 200mm, polar curve adopts the parallel four tooth prickle wires arranged, flow control is at 0.5m/s ~ 0.8m/s.Make uniform distribution of temperature field, thus ensure equally distributed corona discharge current.Hot electrostatic precipitator can 300 ~ 400 DEG C of stable operations reliably and with long-term.
With reference to Fig. 4, the insulated porcelain sleeve of high temperature electrostatic deduster adopts Corundum Ceramics to be material, and insulator type selecting adopts insulation porcelain under GB 200 DEG C of operating temperatures.Three inclination clean-out hatch 107 are offered in insulated porcelain sleeve upper end, adopt heated drying air 108 to carry out hot-air blowing, prevent dust adhesion from affecting high temperature electrostatic deduster operating voltage at insulated porcelain sleeve inwall.Insulated porcelain sleeve lower end is arranged all presses dust cover 109, and be displaced downwardly to by maximum field strength and all press dust cover place, control section flow velocity is 0.5m/s, to suppress the intrusion of dust.Rapping apparatus adopts the mode of tracking mode side rapping of floating, and adopts 95 alumina ceramic materials to make side arm sinker insulation porcelain axle, to prevent the fault such as axis, off-axis of existence.The ash bucket of high temperature electrostatic deduster lower end adopts electrical heat tracing, and control temperature, at 150 DEG C, prevents the problem of the felt jam that dust causes because of condensation or absorption moisture content in ash bucket.
Concrete implementation route is: open the first flashboard 10, first flue gas is drawn by glass kiln flue 1, modified reagent provides from adjusting material charging gear 2, spray in pipeline by pressurized with compressed air, mixed flue gas enters the modified mixing arrangement 3 of dry method flue gas, high temperature electrostatic deduster 4 is entered after abundant mixing, high-temperature flue gas after dedusting enters SCR reactor 6 and carries out removal of nitrogen oxide, ammonia water spray device 5 is arranged before SCR reactor 6, catalyst 8 is arranged in SCR reactor, soot blower 7 is set above catalyst, catalyst is cleaned; Flue gas after final purification enters upstream device through air-introduced machine 9, the ratio resistance of dust, domain size distribution and adhesiveness is regulated by adopting dry method flue gas modifying device 3, mixed dust is reached be suitable for the characteristic condition that deduster removes, performance is removed with the dust improving glass kiln hot precipitator, thus raising SCR denitration system is reliable, stability, raising system availability, makes the discharge standard that glass kiln exhaust emission reaches up-to-date.
Embodiment 2
With reference to Fig. 2, a kind of glass kiln high-temperature flue gas high-effective dust-removing denitrating system, described system comprises the adjusting material charging gear 2, dust arrester 4 and the catalytic reduction device 6 that are communicated with in turn, described adjusting material charging gear 2 is connected with glass kiln by flue 1, described catalytic reduction device 6 is connected with air-introduced machine 9, and the flue gas after purification is entered upstream device.Described dust arrester 4 is high temperature electrostatic deduster, to remove alkali metal particles thing in glass kiln flue gas and other causes the dust of adverse effect to follow-up denitrating catalyst, thus guarantees the stable operation reliably and with long-term of glass kiln flue gas SCR denitration system; Catalytic reduction device 6 is SCR reactor.Adjusting material charging gear adopts pressurized with compressed air to spray modified reagent, and adjusting material selects Cabase compound, and described Cabase compound particle diameter is 48 ~ 80 μm.Flue 1 between glass kiln and adjusting material charging gear 2 is provided with the first flashboard 10, and flue gas removes after dust through hot electrostatic precipitator 4 and enters SCR reactor 6 by pipeline; Described glass kiln is connected with air-introduced machine 9 by bypass flue, and described bypass flue is provided with the second flashboard 11.
The soot blower 7 being provided with the above catalyst 8 of one deck and being arranged on above catalyst is laid with in ammonia water spray device 5, SCR reactor 1 before described SCR reactor 6.Catalyst in SCR reactor 6 is integral honeycombed catalyst, and select the catalyst structure of coarse pitch, lower individual layer height, main active component is V
2o
5-WO
3/ TiO
2, adopt TiO
2make framework material, by V
2o
5-WO
3and TiO
2extruded after mixing; Soot blower adopts pressure-air to purge.
With reference to Fig. 3, described high temperature electrostatic deduster 4 comprises housing 101, positive plate 102, cathode line 103, insulated porcelain sleeve 104, hot air sweeping device 105, ash bucket 106 and rapping apparatus, high-low pressure control device etc., described high temperature electrostatic deduster 4 adopts the board-like layout of line, the high temperature thermal deformation problem of pole plate polar curve is taken into full account during design, polar curve pole plate all adopts high temperature resistant 310S stainless steel, line distance between plates is set to 400mm, polar curve spacing is set to 200mm, polar curve adopts the parallel four tooth prickle wires arranged, flow control is at 0.5m/s ~ 0.8m/s.Make uniform distribution of temperature field, thus ensure equally distributed corona discharge current.Hot electrostatic precipitator can 300 ~ 400 DEG C of stable operations reliably and with long-term.
With reference to Fig. 4, the insulated porcelain sleeve of high temperature electrostatic deduster adopts Corundum Ceramics to be material, and insulator type selecting adopts insulation porcelain under GB 200 DEG C of operating temperatures.Three inclination clean-out hatch 107 are offered in insulated porcelain sleeve upper end, adopt heated drying air 108 to carry out hot-air blowing, prevent dust adhesion from affecting high temperature electrostatic deduster operating voltage at insulated porcelain sleeve inwall.Insulated porcelain sleeve lower end is arranged all presses dust cover 109, and be displaced downwardly to by maximum field strength and all press dust cover place, control section flow velocity is 0.5m/s, to suppress the intrusion of dust.Rapping apparatus adopts the mode of tracking mode side rapping of floating, and adopts 95 alumina ceramic materials to make side arm sinker insulation porcelain axle, to prevent the fault such as axis, off-axis of existence.The ash bucket of high temperature electrostatic deduster lower end adopts electrical heat tracing, and control temperature, at 150 DEG C, prevents the problem of the felt jam that dust causes because of condensation or absorption moisture content in ash bucket.
When place is limited be not suitable for the modified mixing arrangements such as dry method modified blender are installed time, aforesaid way can be adopted to carry out, namely glass kiln flue 1 is directly connected with high temperature electrostatic deduster 4, in the pipeline that flue 1 is connected with high temperature electrostatic deduster 4, by modified charging gear 2, the mode adopting pressurized with compressed air to spray modified reagent in flue carries out flue gas conditioning, high temperature electrostatic deduster 4 is follow-up connects SCR denitration reactor again, is then vented into upstream device by air-introduced machine 9.Compare which, the modified mixing of the mode of embodiment 1 is more abundant.
Claims (10)
1. a glass kiln high-temperature flue gas high-effective dust-removing denitrating system, it is characterized in that: described system comprises the adjusting material charging gear, dust arrester and the catalytic reduction device that are communicated with in turn, described adjusting material charging gear is connected with glass kiln by flue, and described catalytic reduction device is connected with air-introduced machine.
2. glass kiln high-temperature flue gas high-effective dust-removing denitrating system according to claim 1, is characterized in that: described flue is provided with the first flashboard; Described glass kiln is connected with air-introduced machine by bypass flue, and described bypass flue is provided with the second flashboard.
3. glass kiln high-temperature flue gas high-effective dust-removing denitrating system according to claim 2, it is characterized in that: described system also comprises the modified mixing arrangement of dry method flue gas, the modified mixing arrangement of described dry method flue gas is arranged between adjusting material charging gear and dust arrester.
4. glass kiln high-temperature flue gas high-effective dust-removing denitrating system according to claim 3, is characterized in that: the first flashboard is arranged on the flue between adjusting material charging gear and the modified mixing arrangement of dry method flue gas.
5. glass kiln high-temperature flue gas high-effective dust-removing denitrating system according to claim 1, it is characterized in that: described dust arrester is electrostatic precipitator, catalytic reduction device is SCR reactor.
6. glass kiln high-temperature flue gas high-effective dust-removing denitrating system according to claim 5, it is characterized in that: be laid with ammonia water spray device before described SCR reactor, the soot blower being provided with packed catalyst device in SCR reactor and being arranged on above packed catalyst device.
7. glass kiln high-temperature flue gas high-effective dust-removing denitrating system according to claim 1, it is characterized in that: adjusting material selects Cabase compound, described Cabase compound particle diameter is 48 ~ 80 μm.
8. glass kiln high-temperature flue gas high-effective dust-removing denitrating system according to claim 5, it is characterized in that: described electrostatic precipitator comprises housing, positive plate, cathode line, insulated porcelain sleeve, ash bucket, hot air sweeping device, rapping apparatus and high-low pressure control device, described electrostatic precipitator adopts the board-like layout of line, line distance between plates is set to 300 ~ 500mm, polar curve spacing is set to 100 ~ 300mm, polar curve adopts the parallel four tooth prickle wires arranged, flow control is at 0.5m/s ~ 0.8m/s.
9. glass kiln high-temperature flue gas high-effective dust-removing denitrating system according to claim 8, is characterized in that: described insulated porcelain sleeve adopts Corundum Ceramics to be material, and three inclination clean-out hatch are offered in insulated porcelain sleeve upper end, and insulated porcelain sleeve lower end is arranged all presses dust cover.
10. glass kiln high-temperature flue gas high-effective dust-removing denitrating system according to claim 8, is characterized in that: the ash bucket of electrostatic precipitator lower end adopts electrical heat tracing, and control temperature is at 150 DEG C.
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|---|---|---|---|
| CN201510710351.6A CN105233671A (en) | 2015-10-27 | 2015-10-27 | Glass furnace high-temperature flue gas high-efficiency dust-removing denitration system |
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| CN201510710351.6A CN105233671A (en) | 2015-10-27 | 2015-10-27 | Glass furnace high-temperature flue gas high-efficiency dust-removing denitration system |
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| CN107930391A (en) * | 2017-12-27 | 2018-04-20 | 福建龙净环保股份有限公司 | A kind of SCR equipment for denitrifying flue gas |
| CN111068516A (en) * | 2020-01-18 | 2020-04-28 | 浙江大学 | System and method for preventing high-viscosity ash from depositing on surface of catalyst through multi-element reinforced coupling intelligent regulation |
| CN111068917A (en) * | 2019-11-18 | 2020-04-28 | 昆明理工大学 | Dry-type medium-high temperature grading electric filtering dust removal method and device for flue gas of carbothermic reduction furnace |
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| CN107930391A (en) * | 2017-12-27 | 2018-04-20 | 福建龙净环保股份有限公司 | A kind of SCR equipment for denitrifying flue gas |
| CN111068917A (en) * | 2019-11-18 | 2020-04-28 | 昆明理工大学 | Dry-type medium-high temperature grading electric filtering dust removal method and device for flue gas of carbothermic reduction furnace |
| CN111068917B (en) * | 2019-11-18 | 2022-12-02 | 昆明理工大学 | Dry-type medium-high temperature grading electro-filtration dust removal method and device for flue gas of carbothermic reduction furnace |
| CN111068516A (en) * | 2020-01-18 | 2020-04-28 | 浙江大学 | System and method for preventing high-viscosity ash from depositing on surface of catalyst through multi-element reinforced coupling intelligent regulation |
| CN111068516B (en) * | 2020-01-18 | 2023-11-14 | 浙江大学 | System and method for preventing deposition of high-viscosity ash on surface of catalyst through multi-element reinforced coupling intelligent regulation and control |
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Application publication date: 20160113 |
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