CN113230849A - Multi-bin dust remover multi-bin SCR and catalyst activation integrated device and using method thereof - Google Patents
Multi-bin dust remover multi-bin SCR and catalyst activation integrated device and using method thereof Download PDFInfo
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- CN113230849A CN113230849A CN202110460873.0A CN202110460873A CN113230849A CN 113230849 A CN113230849 A CN 113230849A CN 202110460873 A CN202110460873 A CN 202110460873A CN 113230849 A CN113230849 A CN 113230849A
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- 239000000428 dust Substances 0.000 title claims abstract description 171
- 239000003054 catalyst Substances 0.000 title claims abstract description 96
- 230000004913 activation Effects 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 10
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 89
- 239000003546 flue gas Substances 0.000 claims abstract description 89
- BIGPRXCJEDHCLP-UHFFFAOYSA-N ammonium bisulfate Chemical compound [NH4+].OS([O-])(=O)=O BIGPRXCJEDHCLP-UHFFFAOYSA-N 0.000 claims abstract description 8
- 239000000779 smoke Substances 0.000 claims description 48
- 239000004071 soot Substances 0.000 claims description 26
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims description 18
- 238000007664 blowing Methods 0.000 claims description 12
- 229910021529 ammonia Inorganic materials 0.000 claims description 7
- 238000010438 heat treatment Methods 0.000 claims description 6
- 230000003213 activating effect Effects 0.000 claims description 3
- 238000001914 filtration Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 6
- 230000003197 catalytic effect Effects 0.000 abstract description 2
- 238000005406 washing Methods 0.000 abstract 1
- 230000017525 heat dissipation Effects 0.000 description 4
- 238000011065 in-situ storage Methods 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 238000005457 optimization Methods 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000010531 catalytic reduction reaction Methods 0.000 description 2
- 239000003638 chemical reducing agent Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 238000009991 scouring Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 229910000069 nitrogen hydride Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000006722 reduction reaction Methods 0.000 description 1
- 230000000391 smoking effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/02—Particle separators, e.g. dust precipitators, having hollow filters made of flexible material
- B01D46/023—Pockets filters, i.e. multiple bag filters mounted on a common frame
-
- 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
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8621—Removing nitrogen compounds
- B01D53/8625—Nitrogen oxides
-
- 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
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8621—Removing nitrogen compounds
- B01D53/8625—Nitrogen oxides
- B01D53/8631—Processes characterised by a specific device
-
- 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
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/88—Handling or mounting catalysts
-
- 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
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/90—Injecting reactants
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/20—Reductants
- B01D2251/206—Ammonium compounds
- B01D2251/2062—Ammonia
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/02—Other waste gases
- B01D2258/0283—Flue gases
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
The invention relates to a multi-bin dust remover multi-bin SCR and catalyst activation integrated device and a using method thereof, and the device comprises a dust remover sub-bin and an SCR sub-bin which are sequentially communicated with each other along the flow direction of flue gas, wherein a dust removing filter bag is arranged in each dust remover sub-bin, a catalyst is arranged in each SCR sub-bin, the device also comprises a catalyst activation device, the catalyst activation device comprises a circulating pipeline, a heater and a circulating fan are arranged on the circulating pipeline, two ends of the circulating pipeline are respectively communicated to two sides of the catalyst, the dust removal effect is achieved through the dust remover sub-bins, the catalyst arranged in each SCR sub-bin plays a catalytic effect, the flue gas on one side of the catalyst is sent into the heater to be heated through the circulating pipeline, the heated flue gas enters each SCR sub-bin to be washed, and the washing is repeated until ammonium bisulfate on the surface of the catalyst is gasified, so that the dust remover, the SCR and the catalyst are activated, The SCR and the catalyst activation device are combined together.
Description
Technical Field
The invention relates to the field of flue gas treatment, in particular to a multi-bin SCR and catalyst activation integrated device of a multi-bin dust remover and a using method thereof.
Background
The Selective Catalytic Reduction (SCR) denitration technology is that under the action of a catalyst, a reducing agent reacts with nitrogen oxides in flue gas to generate harmless nitrogen and water, so that NOx in the flue gas is removed. The selectivity means that the reducing agent NH3 and NOx in the smoke are subjected to reduction reaction, but do not react with oxygen in the smoke.
The bag type dust collector and the selective catalytic reduction technology are widely applied to the dust removal and denitration process for treating the flue gas of the boiler or the kiln. The dust remover and the SCR denitration integrated device are combined to design, so that the space is saved, the investment is saved, the heat dissipation loss is reduced, the device is particularly suitable for the use occasions of medium-temperature and low-temperature catalysts, and a catalyst self-activating device needs to be configured when the low-temperature catalyst is used. If the original functions of the dust remover are not reduced, the dust remover is convenient to use and filter bags are convenient to replace; the original functions of the SCR are not reduced, the use is convenient, the catalyst is convenient to replace, and the catalyst is self-activated in situ; a smart structural design is required. At present, no perfect design is available in the market for combining the three.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a multi-bin dust remover multi-bin SCR and catalyst activation integrated device and a using method thereof.
The invention is realized by the following technical scheme, and provides a multi-bin dust remover and multi-bin SCR and catalyst activation integrated device, which comprises a dust remover sub-bin and an SCR sub-bin which are sequentially communicated along the flow direction of flue gas, wherein a dust removing filter bag is arranged in the dust remover sub-bin, a catalyst is arranged in the SCR sub-bin, and the device also comprises a catalyst activation device, wherein the catalyst activation device comprises a circulating pipeline, a heater and a circulating fan are arranged on the circulating pipeline, and two ends of the circulating pipeline are respectively communicated to two sides of the catalyst.
The dust remover that sets up in this scheme divides the storehouse to play the dust removal effect, the catalyst that sets up in the SCR divides the storehouse plays catalytic action, through setting up circulation pipeline, make the flue gas of catalyst one side send into the heater and heat, the flue gas that is heated gets into SCR branch storehouse, wash away the catalyst, then get into the flue gas heater through circulation pipeline again, it washes away the catalyst to get into SCR branch storehouse again after being heated, so relapse, until the ammonium bisulfate gasification with the catalyst surface, thereby combine the dust remover, SCR and catalyst activation device three together.
And optimally, the outlet of each dust remover sub-bin is provided with a dust remover sub-bin outlet valve, and a dust remover soot blower is arranged in each dust remover sub-bin. The dust remover soot blower in this scheme plays the deashing effect to the dust remover branch storehouse inside, and the dust remover divides storehouse outlet valve to be used for closing the dust remover branch storehouse.
And as optimization, the outlet of the SCR sub-bin is provided with an SCR sub-bin outlet valve, and an SCR soot blower is arranged in the SCR sub-bin. The SCR soot blower in the scheme plays a role in cleaning soot in the SCR sub-bin, and the SCR sub-bin outlet valve is used for closing the SCR sub-bin.
Preferably, the integrated device comprises two rows of parallel dust remover sub-bins and two rows or one row of parallel SCR sub-bins, wherein inlets of the dust remover sub-bins are communicated with the flue gas main inlet, and outlets of the SCR sub-bins are communicated with the flue gas main outlet. The integrated device in this scheme includes that two rows of dust remover branch storehouses that parallel and two rows or one row of SCR branch storehouses that parallel to can divide the storehouse to single dust remover or SCR divides the storehouse to operate, the flue gas total entrance divides the storehouse with flue gas dispersion to each dust remover, and the flue gas that each SCR divides the storehouse finally passes through the total export of flue gas and discharges.
And as optimization, the SCR sub-bins are arranged between the two rows of dust remover sub-bins, and the total smoke outlet is arranged below the SCR sub-bins. SCR divides the storehouse setting between two rows of dust remover branch storehouses in this scheme to set up the total export of flue gas in SCR divides the storehouse below, thereby makes whole integrated device compact structure, thereby practices thrift the space, reduces steel consumption, practices thrift the investment, reduces the loss of heat dissipation.
The SCR sub-bin is arranged between the two rows of dust remover sub-bins and is higher than the dust remover sub-bins, the total flue gas outlet is arranged above the SCR sub-bins, and the side surfaces of the SCR sub-bins are provided with detachable SCR sub-bin cover plates. In the scheme, the SCR sub-bin is arranged between the two rows of dust remover sub-bins and the SCR sub-bin is higher than the dust remover sub-bins, and the side surface of the SCR sub-bin is provided with a detachable SCR sub-bin cover plate, so that the side surface of the SCR sub-bin is provided with a dismounting opening.
As optimization, the SCR sub-bins are arranged above the dust remover sub-bins, and the smoke main inlet and the smoke main outlet are arranged between the two rows of dust remover sub-bins. SCR divides the storehouse setting in this scheme to divide the storehouse top at the dust remover, and flue gas total entrance and flue gas total exit set up between two rows of dust remover branch storehouses to make whole integrated device compact structure, thereby practice thrift the space, share steelframe, platform reduce the steel consumption, practice thrift the investment, reduce the loss of heat dissipation.
Preferably, the catalyst activation device further comprises a smoke exhaust pipeline, one end of the smoke exhaust pipeline is communicated with an outlet of the circulating pipeline, and the other end of the smoke exhaust pipeline is communicated to an inlet of the dust remover sub-bin or a smoke main inlet. The flue gas pipeline that sets up in this scheme, after the catalyst activation, arrange the flue gas to the entry or the total entry of flue gas of dust remover branch storehouse.
Preferably, the catalyst activation device further comprises a smoke inlet pipeline, one end of the smoke inlet pipeline is communicated with an inlet of the circulating pipeline, the smoke inlet pipeline is communicated with a boiler flue, and a smoke inlet fan and/or a smoke inlet valve are/is installed on the smoke inlet pipeline.
And preferably, a detachable SCR sub-bin cover plate is arranged at the top of the SCR sub-bin. Set up detachable SCR branch storehouse apron in this scheme to be convenient for change the catalyst.
A use method of a multi-bin dust remover multi-bin SCR and catalyst activation integrated device comprises the following steps:
a. the dust-containing NOx-containing flue gas enters a flue gas main inlet, redistributes the flue gas and enters a dust remover sub-bin, dust is removed through filtering by a dust remover filter bag, and ammonia is added from the flue gas main inlet or from an SCR sub-bin inlet;
b. the flue gas continuously enters the SCR sub-bins, ammonia gas and NOX react to remove NOX to form clean flue gas when the flue gas passes through the catalyst, and the clean flue gas enters the main flue gas outlet through the SCR sub-bin outlet valves;
c. closing an inlet and an outlet of the SCR sub-bin, feeding flue gas on one side of the catalyst into a heater through a circulating pipeline for heating, feeding the heated flue gas into the SCR sub-bin for scouring the catalyst, then feeding the flue gas into the heater through the circulating pipeline, feeding the flue gas into the SCR sub-bin again for scouring the catalyst after being heated, and repeating the steps until ammonium bisulfate on the surface of the catalyst is gasified;
d. the SCR soot blower can blow soot in the SCR sub-bins;
e. the dust blowing device of the dust remover can blow dust in the dust remover bins.
The invention has the beneficial effects that: the invention relates to a multi-bin dust remover, multi-bin SCR and catalyst activation integrated device and a use method thereof.A catalyst in a non-use state can be washed by using the heat of high-temperature fluid heated by a heating device under the condition of no shutdown in a boiler or kiln smoke treatment system containing SCR through the arrangement of pipelines, so that ammonium bisulfate adhered to the surface of the catalyst is gasified, accumulated ash is blown out, the heating power is low, the activity recovery of the catalyst in time and high frequency is realized, and the catalyst recovery activity service can be provided for the outside.
The invention saves space, saves investment, reduces heat dissipation loss, and is particularly suitable for the use occasions of medium and low temperature catalysts. The original functions of the dust remover are not reduced, the use is convenient, and the filter bag is convenient to replace; the original functions of the SCR are not reduced, the use is convenient, the catalyst is convenient to replace, and the catalyst can be activated in situ. The catalyst in-situ self-activating device utilizes the heated boiler or kiln flue gas to scour the catalyst, has small heating power and quick temperature rise, and ensures that the liquid ammonium bisulfate is converted into a gaseous state more timely.
Drawings
FIG. 1 is a front view of embodiment 1 of the present invention;
FIG. 2 is a right side view of embodiment 1 of the present invention;
FIG. 3 is a front view of embodiment 2 of the present invention;
FIG. 4 is a right side view of embodiment 2 of the present invention;
FIG. 5 is a front view of embodiment 3 of the present invention;
FIG. 6 is a right side view of embodiment 3 of the present invention;
FIG. 7 is a front view of embodiment 4 of the present invention;
FIG. 8 is a right side view of embodiment 4 of the present invention;
shown in the figure:
1. the device comprises a flue gas main inlet, 2 dust removal bin-dividing inlets, 3 dust removal bin-dividing inlet valves, 4 dust removal bin-dividing inlets, 5 dust removal filter bags, 6 dust removal filter bags, a pattern plate, 7 dust removal soot blowers, 8 dust removal bin-dividing outlets, 9 dust removal bin cover plates, 10 dust removal bin-dividing outlet valves, 11 SCR bin-dividing inlets, 12 catalysts, 13 SCR bin-dividing outlet valves, 14 SCR soot blowers, 15 flue gas main outlets, 16 activation inlet valves, 17 SCR bin-dividing cover plates, 18 smoke exhaust valves, 19 heaters, 20 circulating fans, 21 activation outlet valves, 22 circulating pipelines, 23 smoke exhaust pipelines, 24 SCR bin-dividing inlet valves, 25 smoke exhaust fans, 26 smoke exhaust valves, 27 smoke exhaust pipelines.
Detailed Description
In order to clearly illustrate the technical features of the present solution, the present solution is explained below by way of specific embodiments.
Example 1:
as shown in FIGS. 1-2, the multi-bin dust remover and multi-bin SCR and catalyst activation integrated device comprises a plurality of dust remover sub-bins 4 and a plurality of SCR sub-bins which are sequentially communicated and arranged along the flow direction of flue gas. One SCR sub-bin can correspond to one or more dust remover sub-bins.
The integrated device comprises two rows of parallel dust remover sub-bins 4 and two rows of parallel SCR sub-bins, wherein inlets of the dust remover sub-bins 4 are communicated with a flue gas main inlet 1, as shown in figure 1, dust removing sub-bin inlets 2 are communicated with the flue gas main inlet 1 through bent pipes, dust removing sub-bin inlet valves 3 are arranged on the dust removing sub-bin inlets 2, the dust remover sub-bins 4 on the left side and the right side in the figure 1 are symmetrically arranged, and the dust remover sub bin 4 on the left side is a cross sectional view, so that the left side and the right side in the figure are different in structure. One dust removal sub-bin inlet valve 3 may correspond to one or more dust remover sub-bin outlet valves 10.
As shown in figure 1, the inlet 11 of the SCR sub-bin is communicated with the outlet of the dust remover sub-bin 4, and the outlet of the SCR sub-bin is communicated with the total flue gas outlet 15.
The flue gas inlet 1 is a transverse pipeline, the flue gas outlet 15 is also a transverse pipeline, and the flue gas outlet 15 is positioned above the flue gas inlet 1.
The SCR sub-bins are arranged between the two rows of dust remover sub-bins 4, and the total flue gas outlet 15 and the total flue gas inlet 1 are sequentially arranged below the SCR sub-bins.
The dust collector sub-bin 4 is internally provided with a dust collecting filter bag 5, the dust collecting filter bag 5 can be a soft filter bag or a hard filter cartridge, the outlet of the dust collector sub-bin 4 is provided with a dust collector sub-bin outlet valve 10, and the dust collector sub-bin 4 is internally provided with a dust collector soot blower 7.
The top of the interior of the dust remover sub-bin 4 is provided with a pattern plate 6, the pattern plate 6 is positioned below a dust remover soot blower 7, and the dust remover soot blower 7 is arranged at the top of the interior of the dust remover sub-bin 4, and an air blowing opening is arranged downwards.
As shown in figure 1, the dust remover bin outlet 8 is arranged at the upper end of the dust remover bin 4, and a detachable dust remover bin cover plate 9 is arranged above the dust remover bin outlet 8 and used for detaching the dust removing filter bag 5.
And catalysts 12 are arranged in the SCR sub-bins, SCR sub-bin outlet valves 13 are arranged at the outlets of the SCR sub bins, SCR soot blowing devices 14 are arranged in the SCR sub bins, the catalysts 12 are positioned below the SCR soot blowing devices 14, and blowing openings of the SCR soot blowing devices 14 are arranged downwards. And a detachable SCR sub-bin cover plate 17 is arranged at the top of the SCR sub-bin.
The catalyst activating device comprises a circulating pipeline 22, a heater 19 and a circulating fan 20 are arranged on the circulating pipeline 22, and two ends of the circulating pipeline 22 are respectively communicated to two sides of the catalyst 12. In this embodiment, the inlet of the circulation pipeline 22 is communicated to the air outlet side of the catalyst, and the outlet of the circulation pipeline 22 is communicated to the air inlet side of the catalyst. The heater also comprises a heat exchanger in a manner that can be either wall heat transfer or mass transfer.
The inlet end of the circulation line 22 is provided with an activation inlet valve 16 and the outlet end of the circulation line 22 is provided with an activation outlet valve 21.
The catalyst activation device further comprises a smoke exhaust pipeline 23, one end of the smoke exhaust pipeline 23 is communicated with an outlet of the circulating pipeline 22, the other end of the smoke exhaust pipeline 23 is communicated with an inlet of the dust remover sub-bin 4, in the embodiment, the smoke exhaust pipeline 23 is communicated between the activation outlet valve 21 and the heater 19, and a smoke exhaust valve 18 is arranged on the smoke exhaust pipeline 23.
The catalyst activation device further comprises a smoke inlet pipeline 27, one end of the smoke inlet pipeline 27 is communicated with an inlet of the circulating pipeline 22, the smoke inlet pipeline 27 is communicated with a boiler flue, and a smoke inlet fan 25 and/or a smoke inlet valve 26 are/is mounted on the smoke inlet pipeline 27.
The use method of the invention comprises the following steps:
ammonia is added from a flue gas main inlet, or ammonia is added from an SCR sub-bin inlet, the ammonia is mixed with the flue gas, the dust-containing NOx-containing flue gas enters a flue gas main inlet 1, redistributes the dust-containing NOx-containing flue gas and enters a dust remover sub-bin 4, the dust-containing NOx-containing flue gas enters the dust remover sub-bin 4 through a dust remover sub-bin valve 3, the dust is filtered and removed through a dust remover filter bag 5, the dust passes through a flower plate 6, enters a dust remover sub-bin outlet 8, passes through a dust remover sub-bin outlet valve 10 and enters an SCR sub-bin inlet 11, the ammonia reacts with NOx to remove the NOx to form clean flue gas when passing through a catalyst 12, and the clean flue gas enters a flue gas main outlet 15 through an SCR sub-bin outlet valve 13 at the SCR sub-bin outlet.
Off-line soot blowing: and closing the outlet valve 10 of the dust remover sub-bin or the outlet valve 13 of the SCR sub-bin, and taking the dust remover sub-bin 4 off line at the moment. At this time, the soot blower 7 of the dust collector can be turned on for off-line soot blowing.
Off-line repairing and replacing the filter bag: and closing the inlet valve 3 of the dust remover sub-bin, closing the outlet valve 10 of the dust remover sub-bin or the outlet valve 13 of the SCR sub-bin, and completely taking off the dust remover sub-bin 4 at the moment. At this time, the cover plate 9 of the dust collector chamber can be disassembled, and the dust collection filter bag 5 can be repaired and replaced.
Repairing and replacing the catalyst: and closing the outlet valve 10 of the dust remover sub-bin and closing the outlet valve 13 of the SCR sub-bin, wherein the SCR sub-bin is completely off-line. At the moment, the SCR bin cover plate 17 can be detached, and the catalyst 12 can be repaired and replaced.
Catalyst activation function: closing an outlet valve 10 of a dust remover sub-bin, closing an outlet valve 13 of an SCR sub-bin to completely off-line the SCR sub-bin, stopping the catalyst, opening an activation inlet valve 16, opening an activation outlet valve 21, starting a circulating fan 20, sending the flue gas into a heater 19 for heating, sending the heated flue gas into the SCR sub-bin through a bypass pipeline, flushing the catalyst 12, then entering the heater 19 through a circulating pipeline 22, flushing the catalyst after being heated again in the SCR sub-bin, repeating the steps until ammonium bisulfate on the surface of the catalyst is gasified, starting a flue gas inlet fan 25, opening a flue gas inlet valve 26, sucking clean flue gas, opening a flue gas exhaust valve 18 to exhaust the flue gas to a flue gas main inlet 1, smoking for multiple times, completing catalyst activity recovery and finishing gaseous ammonium bisulfate exhaust.
The catalyst soot blowing function: and (3) partially closing an outlet valve 10 of the dust remover sub-bin, closing an outlet valve 13 of the SCR sub-bin, completely taking off the SCR sub-bin, stopping the catalyst in the SCR sub-bin, opening an activation inlet valve 16, starting a circulating fan 20, starting an SCR soot blower 14, opening a smoke exhaust valve 18 to exhaust the smoke to a smoke main inlet 1, and finishing the soot blowing of the catalyst. Preventing dust from entering clean flue gas.
Example 2:
as shown in fig. 1 to 4, the present embodiment is different from embodiment 1 in that:
the SCR sub-bin is arranged above the dust remover sub-bins 4, the SCR sub-bin outlet valves 13 are arranged between the two rows of dust remover sub-bins 4, the total flue gas inlet 1 and the total flue gas outlet 15 are arranged between the two rows of dust remover sub-bins 4, and the dust remover sub-bin outlet valves 10 are arranged as baffle doors, so that the dust removing filter bag 5 is convenient to disassemble.
Example 3:
as shown in fig. 1 to 6, the present embodiment is different from embodiment 2 in that:
as shown in figure 5, the outlet valve 10 of the dust remover sub-bin is arranged between two rows of dust removing sub-bins, the inlet of the outlet valve 10 of the dust remover sub-bin is communicated with the outlet 8 of the dust remover sub-bin, the outlet of the outlet valve 10 of the dust remover sub-bin is communicated with the inlet of the SCR sub-bin, and the top of the dust remover sub-bin is provided with a detachable cover plate 9 of the dust remover bin.
Example 4:
as shown in fig. 1 to 8, the present embodiment is different from embodiment 1 in that:
the SCR divides the storehouse to set up between two rows of dust remover branch storehouses 4 and the SCR divides the storehouse to be higher than the dust remover branch storehouse 4, and the total export of flue gas 15 sets up in SCR divides the storehouse top, and there is detachable SCR branch storehouse apron SCR branch storehouse side in the SCR to be convenient for set up the dismantlement mouth in SCR divides the storehouse side, can install a plurality of catalysts in SCR divides the storehouse simultaneously. The soot blower can blow downwards or upwards, and an SCR bin inlet valve 24 is arranged at an SCR bin inlet 11, so that distribution of an SCR bin is facilitated.
Of course, the above description is not limited to the above examples, and the undescribed technical features of the present invention can be implemented by or using the prior art, and will not be described herein again; the above embodiments and drawings are only for illustrating the technical solutions of the present invention and not for limiting the present invention, and the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that changes, modifications, additions or substitutions within the spirit and scope of the present invention may be made by those skilled in the art without departing from the spirit of the present invention, and shall also fall within the scope of the claims of the present invention.
Claims (11)
1. The utility model provides a many storehouses of dust remover many storehouses SCR and catalyst activation integrated device which characterized in that: the device comprises a dust remover sub-bin (4) and an SCR sub-bin which are sequentially communicated and arranged along the flowing direction of flue gas, wherein a dust removing filter bag (5) is arranged in the dust remover sub-bin (4), a catalyst (12) is arranged in the SCR sub-bin, the device further comprises a catalyst activating device, the catalyst activating device comprises a circulating pipeline (22), a heater (19) and a circulating fan (20) are arranged on the circulating pipeline (22), and two ends of the circulating pipeline (22) are respectively communicated to two sides of the catalyst (12).
2. The integrated multi-bin dust remover, multi-bin SCR, and catalyst activation device of claim 1, wherein: and the outlet of the dust remover sub-bin (4) is provided with a dust remover sub-bin outlet valve (10), and a dust remover soot blower (7) is arranged in the dust remover sub-bin (4).
3. The integrated multi-bin dust remover, multi-bin SCR, and catalyst activation device of claim 1, wherein: and the outlet of the SCR sub-bin is provided with an SCR sub-bin outlet valve (13), and an SCR soot blower (14) is arranged in the SCR sub-bin.
4. The integrated multi-bin dust remover, multi-bin SCR, and catalyst activation device of claim 1, wherein: the integrated device comprises two rows of parallel dust remover sub-bins (4) and two rows or one row of parallel SCR sub-bins, wherein the inlets of the dust remover sub-bins (4) are communicated with the flue gas main inlet (1), and the outlets of the SCR sub-bins are communicated with the flue gas main outlet (15).
5. The integrated multi-bin dust remover, multi-bin SCR, and catalyst activation device of claim 4, wherein: the SCR sub-bins are arranged between the two rows of dust remover sub-bins (4), and the total flue gas outlet (15) is arranged below the SCR sub-bins.
6. The integrated multi-bin dust remover, multi-bin SCR, and catalyst activation device of claim 4, wherein: the SCR sub-bin is arranged between the two rows of dust remover sub-bins (4), the SCR sub-bins are higher than the dust remover sub-bins (4), the total flue gas outlet (15) is arranged above the SCR sub-bins, and the side surfaces of the SCR sub-bins are provided with detachable SCR sub-bin cover plates.
7. The integrated multi-bin dust remover, multi-bin SCR, and catalyst activation device of claim 4, wherein: the SCR sub-bins are arranged above the dust remover sub-bins (4), and the smoke main inlet (1) and the smoke main outlet (15) are arranged between the two rows of dust remover sub-bins (4).
8. The integrated multi-bin dust remover, multi-bin SCR, and catalyst activation device of claim 1, wherein: the catalyst activation device further comprises a smoke exhaust pipeline (23), one end of the smoke exhaust pipeline (23) is communicated with an outlet of the circulating pipeline (22), and the other end of the smoke exhaust pipeline is communicated to an inlet of the dust remover sub-bin (4) or a smoke main inlet (1).
9. The integrated multi-bin dust remover, multi-bin SCR, and catalyst activation device of claim 8, wherein: the catalyst activation device further comprises a smoke inlet pipeline (27), one end of the smoke inlet pipeline (27) is communicated with an inlet of the circulating pipeline (22), the smoke inlet pipeline (27) is communicated with a boiler flue, and a smoke inlet fan (25) and/or a smoke inlet valve (26) are/is installed on the smoke inlet pipeline (27).
10. The integrated multi-bin dust remover, multi-bin SCR, and catalyst activation device of claim 1, wherein: the top of the SCR sub-bin is provided with a detachable SCR sub-bin cover plate (17).
11. A use method of a multi-bin dust remover, multi-bin SCR and catalyst activation integrated device is characterized by comprising the following steps:
a. the dust-containing and NOX-containing flue gas enters a flue gas main inlet (1), and then redistributes the flue gas to enter a dust remover sub-bin (4), dust is removed by filtering through a dust remover filter bag (5), and ammonia is added from the flue gas main inlet (1) or ammonia is added from an SCR sub-bin inlet;
b. the flue gas continuously enters the SCR sub-bins, when the flue gas passes through a catalyst (12), ammonia gas reacts with NOX to remove NOX to form clean flue gas, and the clean flue gas enters a flue gas main outlet (15) through an SCR sub-bin outlet valve (13);
c. closing an inlet and an outlet of the SCR sub-bin, feeding flue gas on one side of the catalyst (12) into a heater (19) through a circulating pipeline (22) for heating, feeding the heated flue gas into the SCR sub-bin to scour the catalyst (12), then feeding the flue gas into the heater (19) through the circulating pipeline (22), feeding the flue gas into the SCR sub-bin again after being heated to scour the catalyst, and repeating the steps until ammonium bisulfate on the surface of the catalyst is gasified;
d. the SCR soot blower (14) can blow soot in the SCR sub-bins;
e. the dust remover can perform dust blowing in the dust remover sub-bin (4) through a dust remover dust blowing device (7).
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Cited By (1)
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| KR102521501B1 (en) * | 2023-01-19 | 2023-04-25 | 주식회사 신성플랜트 | SCR system |
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