WO2021171628A1 - Dispositif d'abrasion de catalyseur de dénitration - Google Patents

Dispositif d'abrasion de catalyseur de dénitration Download PDF

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Publication number
WO2021171628A1
WO2021171628A1 PCT/JP2020/008548 JP2020008548W WO2021171628A1 WO 2021171628 A1 WO2021171628 A1 WO 2021171628A1 JP 2020008548 W JP2020008548 W JP 2020008548W WO 2021171628 A1 WO2021171628 A1 WO 2021171628A1
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WO
WIPO (PCT)
Prior art keywords
denitration catalyst
abrasive
abrasive material
polishing
air
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PCT/JP2020/008548
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English (en)
Japanese (ja)
Inventor
敏和 吉河
吉田　和広
啓一郎 盛田
亨浩 吉岡
展充 伊田
大輔 坂本
広大 日高
Original Assignee
中国電力株式会社
ハシダ技研工業株式会社
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Application filed by 中国電力株式会社, ハシダ技研工業株式会社 filed Critical 中国電力株式会社
Priority to PCT/JP2020/008548 priority Critical patent/WO2021171628A1/fr
Priority to JP2020535149A priority patent/JP7543137B2/ja
Publication of WO2021171628A1 publication Critical patent/WO2021171628A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/96—Regeneration, reactivation or recycling of reactants
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J38/00—Regeneration or reactivation of catalysts, in general

Definitions

  • the present invention relates to a denitration catalyst polishing device that polishes a denitration catalyst.
  • polishing regeneration is one of the techniques for regenerating a denitration catalyst having deteriorated performance. Polishing regeneration is a technique for recovering catalyst performance by polishing the surface of a denitration catalyst whose performance has deteriorated.
  • Patent Document 1 discloses a technique relating to a method for regenerating a denitration catalyst in which a mixture of an abrasive (abrasive) and a gas is passed through a through hole of the denitration catalyst to grind the inner wall of the through hole.
  • An upstream fixing member having an expanded portion having a cross-sectional area larger than the cross-sectional area of the member to be ground is connected to one end of the member to be ground made of a denitration catalyst.
  • a screen member is arranged in the expanded portion. In such an expanded portion, the mixture of the abrasive and the gas is dispersed as the flow velocity is reduced, and the inner wall of the through hole can be uniformly ground.
  • the present invention has been made in view of the above, and an object of the present invention is to provide a denitration catalyst polishing apparatus capable of uniformly polishing the denitration catalyst without causing a bias in the distribution of the abrasive material flowing into the denitration catalyst.
  • the present invention is a denitration catalyst polishing apparatus for polishing the inner surface of the through holes by allowing an abrasive material to flow together with air through the through holes of the denitration catalyst provided with a plurality of through holes extending in the longitudinal direction.
  • the denitration catalyst is arranged so that the flow path direction of the through hole is substantially perpendicular to the horizontal plane, and the abrasive material flows from the lower side to the upper side of the through hole to the downstream side of the denitration catalyst.
  • a suction section that is arranged and sucks the abrasive together with air, an inflow path that is arranged on the upstream side of the denitration catalyst and has an opening at the upstream end and has a flow path extending in the vertical direction, and the opening.
  • the present invention relates to a denitration catalyst polishing apparatus having a storage portion that is arranged below and stores an abrasive.
  • the storage portion has a retention portion in which the abrasive material is retained and an inclined portion that inclines downward toward the retention portion, and the retention portion is arranged directly below the opening.
  • a classifying portion for separating the polishing agent after polishing the denitration catalyst and the object to be polished is provided, the classification portion is arranged at a position higher than the storage portion, and the abrasive material separated by the classification portion is , It is preferable to supply to the storage unit.
  • the inflow path includes a suction path provided with an opening at an upstream end portion and an upstream side fixing member connected to the denitration catalyst, and the flow path cross-sectional area of the suction path is the upstream side fixing member. It is preferable that it is smaller than the flow path cross-sectional area of.
  • the present invention can provide a denitration catalyst polishing apparatus capable of uniformly polishing the denitration catalyst without causing a bias in the distribution of the abrasive material flowing into the denitration catalyst.
  • the denitration catalyst to be polished by the denitration catalyst polishing apparatus is, for example, the denitration catalyst C which has been used for a certain period of time in the coal-fired power generation facility 100 described below and has deteriorated performance.
  • the coal-fired power generation facility 100 is located on the downstream side of the coal bunker 110, the coal feeder 115, the pulverized coal machine 120, the pulverized coal supply pipe 130, the combustion boiler 140, and the combustion boiler 140.
  • An exhaust passage 150 provided, a denitration device 160 provided in the exhaust passage 150, an air preheater 170, a gas heater 180 for heat recovery, an electrostatic dust collector 190, an induction blower 210, a wet desulfurization device 220, and a gas heater 230 for reheating.
  • a desulfurization ventilator 240, and a chimney 250 are examples of the air preheater 170, a gas heater 180 for heat recovery.
  • the coal bunker 110 stores coal supplied by a coal transport facility from a coal silo (not shown).
  • the coal feeder 115 supplies the coal supplied from the coal bunker 110 to the pulverized coal machine 120 at a predetermined supply speed.
  • the pulverized coal machine 120 produces pulverized coal by pulverizing the coal supplied from the coal feeder 115 to an average particle size of 60 ⁇ m to 80 ⁇ m.
  • a roller mill, a tube mill, a bora mill, a beater mill, an impeller mill and the like are used as the pulverized coal machine 120.
  • the combustion boiler 140 burns the pulverized coal supplied from the pulverized coal supply pipe pulverized coal machine 130 together with the forcibly supplied air by the pulverized coal burner b. Combustion of pulverized coal produces coal ash such as clinker ash and fly ash, and also generates exhaust gas.
  • Clinker ash refers to lumpy coal ash that falls to the bottom of the combustion boiler 140 among the coal ash.
  • Fly ash refers to coal ash having a small particle size (particle size of about 200 ⁇ m or less) that circulates together with exhaust gas on the exhaust passage 150 side.
  • the exhaust passage 150 is arranged on the downstream side of the combustion boiler 140, and circulates the exhaust gas and coal ash generated in the combustion boiler 140.
  • the denitration device 160 removes nitrogen oxides in the exhaust gas.
  • the denitration device 160 removes nitrogen oxides in the exhaust gas by, for example, a dry ammonia catalytic reduction method.
  • the dry ammonia catalytic reduction method is a method in which ammonia gas is injected as a reducing agent into exhaust gas at a relatively high temperature (300 ° C to 400 ° C), and nitrogen oxides in the exhaust gas are decomposed into nitrogen and water vapor by the action with a denitration catalyst. Is.
  • the denitration device 160 includes a denitration reactor 161 in which a denitration reaction is performed, and a plurality of stages of denitration catalyst layers 162 arranged inside the denitration reactor 161.
  • the denitration catalyst layer 162 is composed of a plurality of casings 163.
  • a plurality of denitration catalysts C are housed in the casing 163.
  • the denitration catalyst C is a long (rectangular parallelepiped) catalyst having a honeycomb structure in which a plurality of through holes C1 extending in the longitudinal direction are formed.
  • the plurality of denitration catalysts C are arranged so that the extending direction of the through hole C1 is along the flow path of the exhaust gas.
  • the air preheater 170 is arranged on the downstream side of the denitration device 160 in the exhaust passage 150.
  • the air preheater 170 exchanges heat between the exhaust gas that has passed through the denitration device 160 and the combustion air, cools the exhaust gas, and heats the combustion air.
  • the heated combustion air is supplied to the boiler 140 by the push-in ventilator 175.
  • the heat recovery gas heater 180 is arranged on the downstream side of the air preheater 170 in the exhaust passage 150.
  • the heat recovery gas heater 180 is supplied with the exhaust gas heat recovered by the air preheater 170.
  • the heat recovery gas heater 180 further recovers heat from the exhaust gas.
  • the electrostatic precipitator 190 is arranged on the downstream side of the heat recovery gas heater 180 in the exhaust passage 150.
  • the exhaust gas recovered by the heat recovery gas heater 180 is supplied to the electrostatic precipitator 190.
  • the electrostatic precipitator 190 is a device that collects (captures) coal ash (fly ash) in the exhaust gas by applying a voltage to the electrodes.
  • the fly ash collected (captured) by the electrostatic precipitator 190 is collected by the fly ash recovery device 191.
  • the attract ventilator 210 is arranged on the downstream side of the electrostatic precipitator 190 in the exhaust passage 150.
  • the attraction ventilator 210 takes in the exhaust gas from which the fly ash has been removed in the electrostatic precipitator 190 from the primary side and sends it out to the secondary side.
  • the desulfurization device 220 is arranged on the downstream side of the induction ventilator 210 in the exhaust passage 150.
  • the exhaust gas sent from the induction ventilator 210 is supplied to the desulfurization apparatus 220.
  • the desulfurization apparatus 220 removes sulfur oxides in the exhaust gas by, for example, a wet lime-gypsum method.
  • a wet lime-gypsum method by spraying a mixed solution of limestone and water on the exhaust gas, the sulfur oxides contained in the exhaust gas are absorbed by the mixed solution to generate a desulfurized gypsum slurry, and the sulfur oxides in the exhaust gas are generated. Is a method of removing.
  • the wastewater containing trace substances such as boron and selenium generated at this time is treated by the wastewater treatment device 221.
  • the reheating gas heater 230 is arranged on the downstream side of the desulfurization apparatus 220 in the exhaust passage 150. Exhaust gas from which sulfur oxides have been removed in the desulfurization apparatus 220 is supplied to the reheating gas heater 230. The reheating gas heater 230 heats the exhaust gas.
  • the heat recovery gas heater 180 and the reheating gas heater 230 flow between the exhaust gas flowing between the air preheater 170 and the electrostatic precipitator 190 and the desulfurization device 220 and the desulfurization ventilator 240 in the exhaust passage 150. It may be configured as a gas-gas heater that exchanges heat with the exhaust gas to be generated.
  • the desulfurization ventilator 240 is arranged on the downstream side of the reheating gas heater 230 in the exhaust passage 150.
  • the desulfurization ventilator 240 takes in the exhaust gas heated by the reheating gas heater 230 from the primary side and sends it out to the secondary side.
  • the chimney 250 is arranged on the downstream side of the desulfurization ventilator 240 in the exhaust passage 150. Exhaust gas heated by the reheating gas heater 230 is introduced into the chimney 250. The chimney 250 emits exhaust gas.
  • the denitration catalyst C used in the coal-fired power generation facility 100 described above has thermal deterioration such as sintering due to continued use, chemical deterioration due to poisoning of catalyst components, and physical deterioration in which soot and dust cover the catalyst surface. Due to such factors, the denitration performance deteriorates.
  • the denitration catalyst C whose denitration performance has deteriorated, recovers its denitration performance by polishing the inner surface of the through hole C1 which is the surface of the catalyst and removing deposits and the like on the surface.
  • the denitration catalyst polishing apparatus 1 for polishing the inner surface of the through hole C1 of the denitration catalyst C whose denitration performance has deteriorated to recover the denitration performance will be described.
  • the denitration catalyst polishing device 1 is an device that circulates the polishing material A together with air through the through hole C1 of the denitration catalyst C to polish the inner surface of the through hole C1.
  • the denitration catalyst polishing device 1 includes a storage unit 10, an inflow path 20, an outflow path 30, a cyclone 40, a bag filter 60, and a suction fan 70.
  • the denitration catalyst C which is the object to be polished by the denitration catalyst polishing device 1, is sandwiched between the upstream fixing member 22 in the inflow path 20 and the downstream fixing member 32 in the outflow path 30.
  • the denitration catalyst C is fixed so that the flow path direction of the through hole C1 of the denitration catalyst C is substantially perpendicular to the horizontal plane.
  • the abrasive A flows from the lower side to the upper side of the through hole C1 of the denitration catalyst C.
  • the storage portion 10 is a box-shaped member having an opening at the upper side, and the abrasive A is stored inside. As shown in FIG. 4, the storage portion 10 has a wall surface 11, an inclined portion 12, and a retention portion 13.
  • the wall surface 11 is a wall portion that covers the periphery of the bottom surface of the storage portion 10 and extends in the vertical direction. The wall surface 11 prevents the abrasive material A supplied to the storage unit 10 from leaking to the outside.
  • the wall surface 11 may be provided with an opening for sucking outside air at a position where the abrasive A does not leak.
  • the inclined portion 12 is inclined downward toward the retaining portion 13, and together with the retaining portion 13, constitutes the bottom surface of the storage portion 10.
  • the inclined portion 12 is composed of four inclined surfaces that incline downward from each outer peripheral edge of the bottom surface of the storage portion 10 toward the retaining portion 13.
  • the retention portion 13 is a flat surface portion provided at the center of the bottom surface of the storage portion 10.
  • the retention portion 13 is formed of a substantially rectangular flat surface. Each side of the outer circumference of the retention portion 13 is continuous with the inclined portion 12.
  • the abrasive A is directly supplied to the retaining portion 13, or the abrasive A supplied to the inclined portion 12 flows in and stays there.
  • the retention portion 13 is arranged directly below the opening 21a of the suction passage 21 described later.
  • the inflow path 20 is a flow path on the upstream side of the denitration catalyst C, and is a flow path in which the abrasive material A is sucked by the suction fan 70 together with air and flows into the flow path.
  • the inflow path 20 includes a suction path 21 and an upstream fixing member 22.
  • the suction passage 21 is provided with an opening 21a at the upstream end, and has a vertically extending flow path through which the abrasive A and air can flow.
  • the upper end portion (downstream side end portion) of the suction path 21 is connected to the upstream side fixing member 22.
  • the opening 21a is arranged downward so as to face the retention portion 13. The abrasive A staying in the retention portion 13 is sucked together with air by the suction force of the suction fan 70 as the suction portion, and flows into the flow path of the inflow path 20 through the opening 21a.
  • the upstream side fixing member 22 has a vertically extending flow path through which the abrasive A and air can flow, and the downstream side is connected to the lower end portion (upstream side end portion) of the denitration catalyst C to denitrate the catalyst C. To fix.
  • the upstream side of the upstream side fixing member 22 is connected to the suction passage 21.
  • the flow path of the upstream fixing member 22 and the flow path of the suction path 21 are vertically continuous flow paths.
  • the abrasive A that has flowed in from the suction path 21 together with the air flows into the through hole C1 of the denitration catalyst C via the upstream fixing member 22.
  • a regulating member for dispersing the abrasive A and a buffer member for reducing the flow rate of the abrasive A to prevent damage to the denitration catalyst C may be provided.
  • the suction fan 70 as the suction unit is used as the power for sucking the polishing agent A.
  • the abrasive material A is sucked together with air in the vertical direction from the retention portion 13 via the suction path 21. Therefore, the abrasive A is sufficiently dispersed and flows into the upstream fixing member 22 in a state where the flow velocity is low. Therefore, the denitration catalyst polishing device 1 can be configured without providing the regulation member and the buffer member in the flow path of the upstream side fixing member 22.
  • the flow path crossing area of the suction passage 21 is smaller than the flow path crossing area of the upstream fixing member 22.
  • the flow velocities of the abrasive A and the air flowing through the suction path 21 can be increased.
  • the abrasive A is easily sucked through the opening 21a of the suction path 21.
  • the flow velocity of the abrasive A decreases due to the increase in the channel crossing area, and the abrasive A is dispersed, which is preferable.
  • the outflow passage 30 is a flow path on the downstream side of the denitration catalyst C.
  • the outflow passage 30 is a flow path through which the abrasive material A and the object to be polished generated by polishing the surface of the denitration catalyst C flow.
  • the abrasive material A and the object to be polished are sucked together with air by a suction fan 70 as a suction part.
  • a cyclone 40 is provided in the middle of the outflow passage 30, and the abrasive material A and the object to be polished are separated.
  • the outflow passage 30 is a downstream fixing member 32 that is connected to the upper end portion (downstream side end portion) of the denitration catalyst C to fix the denitration catalyst C, and a downstream flow path that connects the downstream fixing member 32 and the cyclone 40. It has 31 and an abrasive material supply path 33 that supplies the abrasive material A separated by the cyclone 40 to the storage unit 10.
  • the abrasive supply path 33 is one or more flow paths whose upstream end is connected to the cyclone 40.
  • FIG. 4 shows a configuration including two flow paths of the abrasive supply passages 33a and 33b, but the number of the abrasive supply passages 33 is not particularly limited.
  • the abrasive supply path 33 is inclined or hangs downward from the cyclone 40 toward the storage section 10, and the downstream end of the abrasive supply path 33 is open above the storage section 10.
  • an opening of the abrasive supply path 33 can be arranged between the suction path 21 or the upstream fixing member 22 and the wall portion 11.
  • the cyclone 40 is a known cyclone classifier, and is arranged at a position higher than the storage unit 10.
  • the upstream end of the cyclone 40 is connected to the downstream flow path 31.
  • An abrasive material supply path 33 is connected to the lower part of the cyclone 40, and the abrasive material A separated by the cyclone 40 is distributed.
  • the downstream end of the cyclone 40 is connected to the transport pipe 41, and the downstream end of the transport pipe 41 is connected to the bag filter 60.
  • the object to be polished separated by the cyclone 40 flows into the bag filter 60 together with air through the transport pipe 41.
  • the bug filter 60 is a known dust collector.
  • the bag filter 60 collects dust in the air including the object to be polished of the denitration catalyst C.
  • the collected dust is stored in a storage unit (not shown) provided at the bottom of the bag filter 60, and is collected at a desired timing.
  • the downstream end of the bag filter 60 is connected to the connecting pipe 61.
  • the downstream end of the connecting pipe 61 is connected to a suction fan 70 as a suction portion.
  • the clean air that has passed through the bag filter 60 and whose dust has been removed is sucked by the suction fan 70 and discharged into the atmosphere by the exhaust duct 71.
  • the denitration catalyst C whose denitration performance has deteriorated which is the object to be polished by the denitration catalyst polishing device 1, is removed from the denitration device 160 of the coal-fired power generation facility 100.
  • the through hole C1 of the denitration catalyst C may be blocked by coal ash or the like, the blocked object is appropriately removed by air blowing, washing with water, or the like.
  • the denitration catalyst C is sandwiched between the upstream fixing member 22 and the downstream fixing member 32 to fix the denitration catalyst C.
  • the denitration catalyst C may be arranged and fixed so that the side with a large amount of deposits, which was the end on the inlet side of the exhaust gas in the denitration device 160, is on the downstream side where the flow velocity of the abrasive A is high. ..
  • the suction fan 70 starts to operate, and the abrasive material A retained in the retention portion 13 of the storage portion 10 opens the suction path 21 arranged directly above the retention portion 13. It is sucked upstream together with the air through the portion 21a.
  • the suction passage 21 and the upstream fixing member 22 have a flow path extending in the vertical direction inside. Therefore, the abrasive A is sucked vertically together with the air in a uniform state and flows into the through hole C1 of the denitration catalyst C.
  • the polishing agent A flows out from the downstream fixing member 32 after polishing the inner surface of the through hole C1.
  • the outflowing abrasive material A and the object to be polished are sucked together with air by the suction fan 70 and flow into the cyclone 40 through the downstream flow path 31.
  • the abrasive material A and the object to be polished are separated, and the abrasive material A falls by its own weight through the abrasive material supply path 33 and is supplied to the storage portion 10 from the opening at the downstream end of the abrasive material supply path 33.
  • NS The supplied abrasive A reaches the retention portion 13 directly or through the inclined portion 12. That is, the abrasive A circulates in the denitration catalyst polishing apparatus 1.
  • the object to be polished separated by the cyclone 40 is sucked by the suction fan 70, flows into the bag filter 60 via the transport pipe 41, and is collected.
  • the air after the object to be polished is collected is discharged to the outside through the exhaust duct 71.
  • the denitration catalyst C is regenerated by continuing the operation of the denitration catalyst polishing device 1 for a predetermined time, polishing the inner surface of the through hole C1 of the denitration catalyst C, and removing the deposits and the like adhering to the inner surface of the through hole C1.
  • the denitration catalyst C is arranged so that the flow path direction of the through hole C1 is substantially perpendicular to the horizontal plane, and the abrasive A flows from the lower side to the upper side of the through hole C1.
  • a suction fan 70 arranged on the downstream side of the denitration catalyst C and sucking the abrasive A together with air, and a flow arranged on the upstream side of the denitration catalyst C and having an opening 21a at the upstream end and extending in the vertical direction.
  • an inflow passage 20 having a passage and a storage portion 10 arranged below the opening 21a and storing the abrasive A.
  • the abrasive material A is sucked vertically from the storage portion 10 together with the air, circulates in the through hole C1 through the inflow path 20, and the inner surface of the through hole C1 is polished. Therefore, since the abrasive A is uniformly dispersed, the inside of the through hole C1 can be uniformly polished. Further, an apparatus or a flow path structure for uniformly dispersing the abrasive A is not required.
  • the bottom surface of the storage portion 10 has a retention portion 13 in which the abrasive A stays, and an inclined portion 12 that inclines downward toward the retention portion 13, and the retention portion 13 is arranged directly below the opening 21a. And said. As a result, the abrasive A supplied to the storage section 10 can be accumulated in the retention section 13 and efficiently sucked from the inflow path 20.
  • a cyclone 40 for separating the polishing agent A after polishing the denitration catalyst C and the object to be polished is provided, the cyclone 40 is arranged at a position higher than the storage portion 10, and the polishing material A separated by the cyclone 40 is It was assumed that it was supplied to the storage unit 10. As a result, the abrasive A circulates in the polishing apparatus, so that the frequency of replenishment of the abrasive A can be reduced. Further, since the abrasive A separated by the cyclone 40 can be dropped by its own weight and supplied to the storage unit 10, power is not required to supply the abrasive A, and the device configuration can be simplified.
  • the inflow passage 20 includes a suction passage 21 having an opening 21a and an upstream side fixing member 22 connected to the denitration catalyst C, and the flow path cross-sectional area of the suction passage 21 is the flow path of the upstream side fixing member 22. It was assumed to be smaller than the cross-sectional area. As a result, the abrasive A can be easily sucked from the suction path 21. Further, when the abrasive A flows into the upstream fixing member 22 from the suction path 21, the flow velocity of the abrasive A decreases and is dispersed, so that the inside of the through hole C1 can be uniformly polished and the end face of the denitration catalyst can be polished. Damage can be prevented.
  • FIG. 5 is a perspective view showing a configuration in the vicinity of the storage portion 10A of the denitration catalyst polishing apparatus 1A according to the present embodiment.
  • the configuration other than the storage unit 10A of the present embodiment is the same as that of the first embodiment.
  • the storage portion 10A is a cylindrical member having a partial opening at the upper side and a bottom surface 13A at the lower side, and the abrasive material A is stored inside. As shown in FIG. 5, the storage unit 10A has a wall surface 11A, a bottom surface 13A, and a cover member 14.
  • the wall surface 11A is a wall portion that covers the periphery of the bottom surface 13A of the storage portion 10A and extends in the vertical direction.
  • the wall surface 11A is provided with a plurality of air holes 110 for supplying air from the outside to the inside of the storage portion 10A.
  • An air hose (not shown) for press-fitting compressed air from a compressor is connected to the air hole 110, for example.
  • the direction of the air flow from the outside to the inside of the storage portion 10A is preferably the direction toward the central portion of the bottom surface 13A as shown by the white arrow in FIG. As a result, the abrasive A that has accumulated in the corners of the bottom surface 13A can be agitated and moved to the center of the bottom surface 13A.
  • the number of air holes 110 is not particularly limited, but for example, four air holes 110 can be provided evenly in the circumferential direction of the wall surface 11A.
  • the wall surface 11A is provided with an abrasive material supply hole 111 that can be connected to the abrasive material supply path 33.
  • the abrasive material A is supplied to the storage portion 10A from the abrasive material supply hole 111 through the abrasive agent supply path 33.
  • two abrasive material supply holes 111 are provided so as to be connectable to the downstream end portions of the two abrasive material supply paths 33a and 33b.
  • the abrasive supply hole 111 is preferably provided below the air hole 110. As a result, it is possible to prevent the abrasive material A from scattering.
  • the bottom surface 13A is a substantially circular flat surface portion that constitutes the bottom surface of the storage portion 10A.
  • the storage portion 10A according to the present embodiment can move the abrasive material A to the central portion by stirring the abrasive material A through the air holes 110. Therefore, unlike the first embodiment, it can be configured without providing an inclined portion on the bottom surface.
  • the bottom surface 13A may be configured by providing an inclined portion so that the central portion of the bottom surface 13A is at a low position.
  • the cover member 14 is a member that covers a part of the upper surface of the cylindrical storage portion 10A.
  • the cover member 14 covers a part of the upper surface of the storage portion 10A from the outer peripheral side end portion to the inner peripheral side.
  • the cover member 14 has an opening larger than the opening 21a of the suction path 21 in the center. The tip of the suction passage 21 is inserted into the storage portion 10A through the opening, and the abrasive is sucked into the suction passage 21.
  • the cover member 14 having the above configuration suppresses the scattering of the abrasive material A to the outside.
  • the storage portion 10A is a cylindrical member having a bottom surface 13A, and the wall surface 11A is provided with a plurality of air holes 110 to which air is supplied from the outside and a plurality of abrasive material supply holes 111 to which the abrasive material A is supplied.
  • the abrasive material A supplied from the abrasive material supply hole 111 is agitated by the air supplied from the air hole 110 and moved to the vicinity of the central portion of the bottom surface 13A. Therefore, the abrasive material A supplied to the storage unit 10A can be efficiently sucked from the inflow passage 20.
  • the present invention is not limited to the above embodiment, and can be appropriately modified.
  • the storage unit 10 has been described as a box-shaped member having an opening at the top, but the present invention is not limited to the above configuration.
  • the storage unit 10 may have a shape capable of storing and supplying the abrasive A.
  • a cylindrical storage portion 10 having an open upper portion, a retention portion 13 having a circular shape, and an inclined portion 12 inclined with respect to the retention portion 13 may be an inclined portion 12 composed of one continuous surface.
  • Denitration catalyst polishing device 10 Storage section 12 Inclined section 13 Retention section 20 Inflow path 21 Suction path 21a Opening section 22 Upstream side fixing member 40 Cyclone (classification section) 70 Suction fan (suction part) C Denitration catalyst C1 Through hole A Abrasive

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Abstract

L'objectif de la présente invention est de fournir un dispositif d'abrasion de catalyseur de dénitration qui n'est pas sensible aux écarts dans la distribution d'un matériau abrasif s'écoulant dans un catalyseur de dénitration, et est ainsi capable d'abraser de manière uniforme le catalyseur de dénitration.　Ce dispositif d'abrasion de catalyseur de dénitration 1 amène un matériau abrasif A et de l'air à s'écouler à travers des trous traversants C1 dans un catalyseur de dénitration C pourvu d'une pluralité de trous traversants C1 qui s'étendent dans la direction longitudinale, et abrase les surfaces internes des trous traversants C1. Le catalyseur de dénitration C est positionné de sorte que la direction de trajet d'écoulement des trous traversants C1 soit sensiblement perpendiculaire au plan horizontal. Le matériau abrasif A s'écoule à travers les trous traversants C1 du bas vers le haut. Le dispositif d'abrasion de catalyseur de dénitration comprend : un ventilateur d'admission 70 qui est positionné sur le côté aval du catalyseur de dénitration C et aspire le matériau abrasif A conjointement avec l'air ; un trajet d'entrée 20 qui est positionné sur le côté amont du catalyseur de dénitration C, et comprend un trajet d'écoulement qui s'étend dans la direction verticale et qui comprend une ouverture 21a au niveau de l'extrémité côté amont ; et une partie d'accumulation 10 qui est positionnée au-dessous de l'ouverture 21a et accumule le matériau abrasif A.
PCT/JP2020/008548 2020-02-28 2020-02-28 Dispositif d'abrasion de catalyseur de dénitration WO2021171628A1 (fr)

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JPH04200642A (ja) * 1990-11-30 1992-07-21 Japan Carlit Co Ltd:The 触媒の再生方法
KR20040042667A (ko) * 2002-11-15 2004-05-20 유정근 폐탈질 촉매의 재생방법
JP2011104581A (ja) * 2009-10-19 2011-06-02 Hidaka Fine-Technologies Co Ltd 付着物除去装置、付着物除去装置を用いて付着物を除去した対象物及び付着物除去装置を用いた付着物除去方法
WO2014155628A1 (fr) * 2013-03-28 2014-10-02 中国電力株式会社 Procédé permettant la régénération d'un catalyseur de dénitrification

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Publication number Priority date Publication date Assignee Title
JPH04200642A (ja) * 1990-11-30 1992-07-21 Japan Carlit Co Ltd:The 触媒の再生方法
KR20040042667A (ko) * 2002-11-15 2004-05-20 유정근 폐탈질 촉매의 재생방법
JP2011104581A (ja) * 2009-10-19 2011-06-02 Hidaka Fine-Technologies Co Ltd 付着物除去装置、付着物除去装置を用いて付着物を除去した対象物及び付着物除去装置を用いた付着物除去方法
WO2014155628A1 (fr) * 2013-03-28 2014-10-02 中国電力株式会社 Procédé permettant la régénération d'un catalyseur de dénitrification

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114384074A (zh) * 2021-12-10 2022-04-22 苏州西热节能环保技术有限公司 一种催化剂磨损判定方法
CN114384074B (zh) * 2021-12-10 2024-06-11 苏州西热节能环保技术有限公司 一种催化剂磨损判定方法

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