CN111644059A - Integrative device of dust removal denitration - Google Patents
Integrative device of dust removal denitration Download PDFInfo
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- CN111644059A CN111644059A CN202010396516.8A CN202010396516A CN111644059A CN 111644059 A CN111644059 A CN 111644059A CN 202010396516 A CN202010396516 A CN 202010396516A CN 111644059 A CN111644059 A CN 111644059A
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- 239000000428 dust Substances 0.000 title claims abstract description 76
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 claims abstract description 49
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 38
- 239000003546 flue gas Substances 0.000 claims abstract description 38
- 238000002347 injection Methods 0.000 claims abstract description 38
- 239000007924 injection Substances 0.000 claims abstract description 38
- 230000007246 mechanism Effects 0.000 claims abstract description 30
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 17
- 238000006243 chemical reaction Methods 0.000 claims abstract description 9
- 238000001914 filtration Methods 0.000 claims description 38
- 239000003054 catalyst Substances 0.000 claims description 18
- 229910021529 ammonia Inorganic materials 0.000 claims description 11
- 239000002184 metal Substances 0.000 claims description 8
- 238000004887 air purification Methods 0.000 claims description 7
- 238000005192 partition Methods 0.000 claims description 7
- 238000000926 separation method Methods 0.000 claims description 7
- 239000007789 gas Substances 0.000 description 8
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 6
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 5
- 235000011114 ammonium hydroxide Nutrition 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 238000007664 blowing Methods 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- 239000000779 smoke Substances 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000002035 prolonged effect Effects 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 239000004071 soot Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 230000007306 turnover Effects 0.000 description 2
- 229910002651 NO3 Inorganic materials 0.000 description 1
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 1
- 238000000889 atomisation Methods 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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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
- B01D53/74—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
- 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
-
- 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
- B01D46/04—Cleaning filters
-
- 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
- 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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Environmental & Geological Engineering (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)
- Filtering Of Dispersed Particles In Gases (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention provides a dust removal and denitration integrated device, which comprises a tower body, wherein the tower body is provided with an air inlet flue, an ash hopper, a filter chamber, an air purifying chamber and a denitration chamber which are sequentially communicated; the air inlet flue is provided with an air inlet, a reducing agent injection mechanism is arranged at the air inlet in the air inlet flue, a filter bag is arranged in the filter chamber, and a filter bag dust removing mechanism is arranged in the air purifying chamber; the air inlet flue is arranged above the ash bucket, the filter chamber is arranged above the ash bucket, and the air purifying chamber is arranged above the filter chamber. The reducing agent injection mechanism of the dust removal and denitration integrated device is arranged at the air inlet in the air inlet flue, and the reducing agent is mixed with the high-temperature flue gas and flows in a turning manner, so that the high-temperature flue gas and the ammonia gas are mixed more fully before entering the denitration chamber, and the denitration reaction efficiency is improved; the dust removal and denitration integrated device has the advantages of compact structure, small occupied space, smooth airflow flow path, small inlet-outlet pressure difference, low running resistance and small flue gas temperature drop.
Description
Technical Field
The invention relates to the field of denitration equipment, in particular to a dust removal and denitration integrated device.
Background
In the cement kiln tail high-temperature flue gas treatment process, the temperature of the flue gas is generally over 300 ℃, the split process arrangement of an electric dust removal device and an SCR denitration reactor is generally adopted, and front and rear devices are connected through a pipeline to respectively play roles in dust collection and denitration. Along with the improvement of environmental protection requirements, in the high-temperature flue gas treatment process at the tail of a cement kiln, the intermediate flow links are more, the treatment devices connected in series in the middle are more, the ash removal devices are more, the electrical control is complex, and the denitration equipment occupies a large space and has higher running resistance.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide the dust removal and denitration integrated device.
In order to achieve the purpose, the invention adopts the technical scheme that: a dust removal and denitration integrated device comprises a tower body, wherein the tower body is provided with an air inlet flue, an ash hopper, a filter chamber, an air purifying chamber and a denitration chamber which are sequentially communicated;
the air inlet flue is provided with an air inlet, a reducing agent injection mechanism is arranged at the air inlet in the air inlet flue, a filter bag is arranged in the filter chamber, and a filter bag dust removal mechanism is arranged in the air purification chamber;
the air inlet flue is arranged above the ash bucket, the filter chamber is arranged above the ash bucket, and the air purifying chamber is arranged above the air inlet flue.
The reducing agent injection mechanism of the dust removal and denitration integrated device is arranged at an air inlet in the air inlet flue, ammonia water or ammonia gas capable of reducing nitrogen oxides under the action of a catalyst is injected, after high-temperature flue gas enters the air inlet flue and is mixed with the ammonia gas, as the air inlet flue, the ash hopper, the filter chamber, the air purifying chamber and the denitration chamber are sequentially communicated, and the air inlet flue is arranged above the ash hopper, mixed gas of the high-temperature flue gas and the ammonia gas firstly enters the ash hopper downwards and then enters the filter chamber upwards from the ash hopper, and the mixed gas of the high-temperature flue gas and the ammonia gas flows in a turnover manner, so that the high-temperature flue gas and the ammonia gas are mixed more fully before entering the denitration chamber; the dust removal and denitration integrated device is provided with the filter bag in the filter chamber, so that dust in the mixed gas of the high-temperature flue gas and the ammonia gas can be filtered, the high-temperature flue gas and the ammonia gas are more fully mixed before entering the denitration chamber through the filtering of the filter bag, the denitration reaction efficiency is improved, and the escape amount of the ammonia gas is reduced; the filter chamber of foretell integrative device of dust removal denitration is located the ash bucket directly over, the air-purifying chamber is located the top of filter chamber and air inlet flue, carry out the deashing through the filter bag deashing mechanism in the air-purifying chamber to the filter bag, make the dust can drop from the filter bag surface and directly fall into the ash bucket downwards, both realized the filtration dust removal of high temperature flue gas and with the intensive mixing of ammonia and saved air inlet flue, the ash bucket, the filter chamber, pipeline and the fixed bolster between air-purifying chamber and the denitration room, make foretell integrative device of dust removal denitration compact structure, the occupation of land space is few, the air current flow route is smooth and easy, exit pressure difference is little, the running resistance is low, the flue gas temperature.
Preferably, the reducing agent injection mechanism is an ammonia injection mechanism or an ammonia injection mechanism.
Preferably, the filtering chamber comprises two filtering chambers which are symmetrically arranged, and the dust removal and denitration integrated device comprises an even number of ash hoppers which are respectively positioned below the two filtering chambers according to the number in average.
Preferably, the filtering chamber comprises two filtering chambers which are symmetrically arranged, the dust removal and denitration integrated device comprises four ash hoppers, and the four ash hoppers are respectively and evenly arranged below the two filtering chambers.
The dust removal and denitration integrated device is provided with the two symmetrical filtering chambers and the four ash hoppers on two sides, so that the filtering and dust removal capabilities of high-temperature flue gas and the sufficient mixing capability of ammonia gas are improved, and the dust removal device is compact in structure and small in occupied space.
Preferably, the air inlet flue is provided with a flue gas outlet, the flue gas outlet of the air inlet flue is communicated with the upper part of the ash bucket, and an inclined airflow separation plate is arranged at the upper part of the flue gas outlet of the air inlet flue, so that the air inlet flue is communicated with the ash bucket and is separated from the air purifying chamber.
The dust removal and denitration integrated device shunts and introduces the mixed gas of high-temperature flue gas and ammonia gas into the ash bucket below through the airflow separation plate, the airflow flow path is smooth, the pressure difference between the inlet and the outlet is small, and the running resistance is low.
Preferably, the air purification chamber is located above the filtering chamber, a horizontal separation flower plate is arranged between the filtering chamber and the air purification chamber, a plurality of through holes are uniformly formed in the separation flower plate to communicate the filtering chamber and the air purification chamber, the number of the filter bags arranged in the filtering chamber is equal to that of the through holes, each filter bag is detachably fixed on the cross section of each through hole, and each filter bag corresponds to one through hole.
According to the dust removal and denitration integrated device, the filter bags are detachably fixed on the cross sections of the through holes, so that smoke in the filter chambers enters the air purifying chamber from the filter bag openings after being filtered and dedusted through the outer surfaces of the filter bags, and the smoke between the filter chambers and the air purifying chamber is separated by arranging the filter bags with the same number as the through holes on the separation flower plates, so that the purpose of dedusting is achieved.
Preferably, the filter bag dust cleaning mechanism comprises a pulse valve, an air bag and an injection pipe which are communicated in sequence.
The dust removal and denitration integrated device starts to perform blowing and ash removal after dust on the surface of the filter bag in the filter chamber is gathered to a certain thickness, high-speed airflow generated by compressed air in the air bag under the control of the pulse valve enters the filter bag through the nozzle of the blowing pipe, and the high-speed airflow passes through the filter bag from the inner wall of the filter bag to reach the outer surface, so that a dust layer on the outer surface falls off and enters the dust hopper, thereby reducing the pressure difference between the inner surface and the outer surface of the filter bag and lightening the running resistance of a.
The injection pipe is transversely arranged, the lower part of the injection pipe is provided with a plurality of nozzles communicated with the injection pipe, the number of the nozzles is equal to that of the filter bags, and one nozzle corresponds to a filter bag opening facing one filter bag.
The dust removal and denitration integrated device is provided with a plurality of nozzles communicated with the injection pipe through the lower part of the injection pipe, the number of the nozzles is equal to that of the through holes, one nozzle corresponds to one through hole, air flow blown to the filter bag can be more uniform, the filter resistance of the filter bag after dust removal is lower, and further filtration is facilitated.
Preferably, the filter bag is a metal filter bag.
The dust removal and denitration integrated device adopts the metal filter bag, has the advantages of high temperature resistance, high filtration precision and small ash removal resistance, and after the metal filter bag of the high-temperature dust and nitrate integrated bag dust removal device is subjected to efficient fine filtration, the dust concentration can be reduced to 10mg/Nm3In the method, the dust concentration entering the denitration reaction chamber is greatly reduced, so that the using amount and the number of layers of the catalyst can be reduced, the risk of catalyst blockage and the running resistance are reduced, the denitration efficiency is improved, and the service life of the catalyst is prolonged.
Preferably, the dust removal and denitration integrated device further comprises an air outlet flue, and the air outlet flue is communicated with the denitration chamber.
Preferably, the denitration chamber is positioned above the air purifying chamber, and the denitration chamber is an SCR denitration reaction chamber.
Preferably, two catalyst layers are arranged in the denitration chamber.
The dust removal and denitration integrated device is provided with two catalyst layers, so that the risk and the running resistance of catalyst blockage are further reduced, the denitration efficiency is improved, the service life of the catalyst is prolonged, the existing denitration reactor catalyst is more than three layers, each layer is provided with a soot blower and a pressure difference detection device, and the device has more equipment investment, installation and running control points and is prone to failure. The dust removal and denitration integrated device does not need a soot blower and a compressed air source consuming soot cleaning, the usage amount of the reducing agent ammonia is further reduced, and the escape amount of the reducing agent is correspondingly reduced.
The invention has the beneficial effects that: the invention provides a dust removal and denitration integrated device, which has the following advantages:
(1) the reducing agent injection mechanism of the dust removal and denitration integrated device is arranged at the air inlet in the air inlet flue and can inject ammonia water or ammonia gas serving as a reducing agent, and the ammonia water or ammonia gas is mixed with high-temperature flue gas in the form of ammonia gas in a high-temperature environment and flows in an overturning manner, so that the high-temperature flue gas and the ammonia gas are mixed more fully before entering a denitration chamber, and the denitration reaction efficiency is improved;
(2) the dust removal and denitration integrated device is of an integrated structure, the device is compact, the occupied space is small, the airflow flow path is smooth, the pressure difference between an inlet and an outlet is small, the running resistance is low, and the temperature drop of flue gas is small;
(3) the dust removal and denitration integrated device provided by the invention adopts the metal filter bag, has the advantages of high temperature resistance, high filtration precision and small ash removal resistance, is beneficial to reducing the risk of catalyst blockage and the running resistance, improves the denitration efficiency, and prolongs the service life of the catalyst.
Drawings
Fig. 1 is a front view of a dust removal and denitration integrated device in an embodiment of the invention.
Fig. 2 is a left side view of the structure of the integrated dedusting and denitration device in the embodiment of the invention.
The device comprises a reducing agent injection mechanism 1, a reducing agent injection mechanism 2, an air inlet of an air inlet flue 3, the air inlet flue 4, an ash bucket 5, a filter chamber 6, a filter bag 7, an air bag 8, a pulse valve 9, an injection pipe 10, a partition flower plate 11, an air purifying chamber 12, a denitration chamber 13, a catalyst layer 14, an air outlet flue 15 and an airflow partition plate.
Detailed Description
To better illustrate the objects, aspects and advantages of the present invention, the present invention will be further described with reference to specific examples.
Example 1
As a dust removal and denitration integrated device of the embodiment of the invention, the dust removal and denitration integrated device comprises a tower body, wherein the tower body is provided with an air inlet flue 3, an ash hopper 4, a filter chamber 5, an air purifying chamber 11 and a denitration chamber 12 which are sequentially communicated;
the air inlet flue 3 is provided with an air inlet 2, the air inlet 2 in the air inlet flue is provided with a reducing agent injection mechanism 1, the filter chamber 5 is internally provided with a filter bag 6, and the air purifying chamber 11 is internally provided with a filter bag dust removing mechanism;
the air inlet flue 3 is arranged above the ash bucket 4, the filter chamber 5 is arranged above the ash bucket 4, and the air purifying chamber 11 is arranged above the air inlet flue 3.
Further, the reducing agent injection mechanism 1 is an ammonia injection mechanism or an ammonia injection mechanism.
In order to improve the filtering and dust removing capacity of the high-temperature flue gas and the sufficient mixing capacity of the high-temperature flue gas and ammonia gas, the dust removing device is compact in structure and small in occupied space, the filtering chamber 5 comprises two filtering chambers which are symmetrically arranged, the dust removing and denitration integrated device comprises four ash hoppers 4, and the four ash hoppers 4 are evenly and respectively arranged below the two filtering chambers in number.
In order to introduce the mixed gas of high-temperature flue gas and ammonia gas into the ash hoppers below two sides in a shunting manner and ensure smooth flow paths of the air flow, small inlet-outlet pressure difference and small running resistance, the air inlet flue 3 is provided with a flue gas outlet, the flue gas outlet of the air inlet flue 3 is communicated with the upper parts of the ash hoppers 4, and the upper part of the flue gas outlet of the air inlet flue is provided with an oblique air flow partition plate 15 so that the air inlet flue 3 is communicated with the upper parts of the four ash hoppers 4 and is separated from the air purifying chamber.
Further, the filter bag dust cleaning mechanism comprises a pulse valve 8, an air bag 7 and an injection pipe 9 which are communicated in sequence. When dust on the surface of the filter bag in the filter chamber is gathered to a certain thickness, blowing and ash removal are carried out, high-speed airflow generated by compressed air in the air bag under the control of the pulse valve enters the filter bag through a nozzle of the blowing pipe, and the high-speed airflow penetrates through the filter bag from the inner wall of the filter bag to reach the outer surface, so that a dust layer on the outer surface falls off and enters the dust hopper, thereby reducing the pressure difference between the inner surface and the outer surface of the filter bag and lightening the running resistance of the system.
Further, the air purifying chamber 11 is located above the filtering chamber 5, a horizontal partition pattern plate 10 is arranged between the filtering chamber 5 and the air purifying chamber 11, the partition pattern plate 10 is evenly provided with a plurality of through holes to communicate the filtering chamber 5 with the air purifying chamber 11, the number of the filtering bags 6 arranged in the filtering chamber 5 is equal to that of the through holes, the filtering bag openings of the filtering bags 6 are detachably fixed on the cross sections of the through holes, and one filtering bag 6 corresponds to one through hole. According to the dust removal and denitration integrated device, the filter bags are detachably fixed on the cross sections of the through holes, so that smoke in the filter chambers enters the air purifying chamber from the filter bag openings after being filtered and dedusted through the outer surfaces of the filter bags, and the smoke between the filter chambers and the air purifying chamber is separated by arranging the filter bags with the same number as the through holes on the separation flower plates, so that the purpose of dedusting is achieved.
Further, the injection pipe 9 is transversely arranged, a plurality of nozzles communicated with the injection pipe 9 are equidistantly arranged at the lower part of the injection pipe 9, the number of the nozzles is equal to that of the filter bags 6, and one nozzle correspondingly faces one filter bag 6. Through the lower part equidistance at the injection pipe be provided with a plurality of with the nozzle of injection pipe intercommunication, and the quantity of nozzle equals with the quantity of filter bag, a nozzle corresponds the filter bag mouth towards a filter bag, can make to blow more accurate to the air current position of filter bag, and jetting pressure is stronger for the filter resistance of filter bag is lower after the dust removal, is favorable to further filtering.
Further, the filter bag 6 is a metal filter bag. The dust removal and denitration integrated device adopts the metal filter bag, has the advantages of high temperature resistance, high filtration precision and small ash removal resistance, and after the metal filter bag of the high-temperature dust and denitration integrated bag dust removal device is subjected to high-efficiency fine filtration, the dust concentration can be reduced to 10mg/Nm3In the method, the dust concentration entering the denitration reaction chamber is greatly reduced, so that the using amount and the number of layers of the catalyst can be reduced, the risk of catalyst blockage and the running resistance are reduced, the denitration efficiency is improved, and the service life of the catalyst is prolonged.
Further, the dust removal and denitration integrated device further comprises an air outlet flue 14, and the air outlet flue 14 is communicated with the denitration chamber 12.
Further, the denitration chamber 12 is located above the air purification chamber 11, and the denitration chamber 12 is an SCR denitration reaction chamber.
Further, two catalyst layers 13 are provided in the denitration chamber 12.
The reducing agent injection mechanism of the dust removal and denitration integrated device is arranged at an air inlet in the air inlet flue, ammonia water and ammonia gas which can reduce nitrogen oxides under the action of a catalyst are injected, the ammonia water and the ammonia gas form ammonia gas at high temperature, and after high-temperature flue gas enters the air inlet flue and is mixed with the ammonia gas, because the air inlet flue, the ash bucket, the filter chamber, the air purifying chamber and the denitration chamber are sequentially communicated, and the air inlet flue is arranged above the ash bucket, the mixed gas of the high-temperature flue gas and the ammonia gas firstly enters the ash bucket downwards and then enters the filter chamber upwards from the ash bucket, and the mixed gas of the high-temperature flue gas and the ammonia gas flows in a turnover manner, so that the high-temperature flue gas and the ammonia gas are mixed more; the dust removal and denitration integrated device is provided with the filter bag in the filter chamber, so that dust in the mixed gas of the high-temperature flue gas and the ammonia gas can be filtered, the high-temperature flue gas and the ammonia gas are more fully mixed before entering the denitration chamber after being filtered by the filter bag, and the denitration reaction efficiency is improved; the filter chamber of foretell integrative device of dust removal denitration is located the ash bucket directly over, the air-purifying chamber is located the top of filter chamber and air inlet flue, carry out the deashing through the filter bag deashing mechanism in the air-purifying chamber to the filter bag, make the dust can directly fall into the ash bucket downwards, both realized the filtration dust removal of high temperature flue gas and ammonia and intensive mixing and saved air inlet flue, the ash bucket, the filter chamber, pipeline and fixed bolster between air-purifying chamber and the denitration chamber, make foretell integrative device of dust removal denitration compact structure, take up an area of the space few, the air current flow route is smooth and easy, it is little to import and export pressure differential, the running resistance is little, the cigarette temperature reduces.
Further, an ammonia gas injection mechanism is arranged at the air inlet 2 in the air inlet flue. The ammonia atomization effect that the ammonia injection mechanism sprayed is better, is favorable to improving denitration efficiency.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the protection scope of the present invention, and although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (10)
1. A dust removal and denitration integrated device is characterized by comprising a tower body, wherein the tower body is provided with an air inlet flue, an ash hopper, a filter chamber, an air purifying chamber and a denitration chamber which are sequentially communicated;
the air inlet flue is provided with an air inlet, a reducing agent injection mechanism is arranged at the air inlet in the air inlet flue, a filter bag is arranged in the filter chamber, and a filter bag dust removal mechanism is arranged in the air purification chamber;
the air inlet flue is arranged above the ash bucket, the filter chamber is arranged above the ash bucket, and the air purifying chamber is arranged above the air inlet flue.
2. The integrated dust and denitration device of claim 1, wherein the filter chamber comprises two filter chambers which are symmetrically arranged, the integrated dust and denitration device comprises an even number of ash hoppers which are respectively arranged below the two filter chambers according to the number average, and the reducing agent injection mechanism is an ammonia injection mechanism or an ammonia injection mechanism.
3. The integrated dedusting and denitration device of claim 2, wherein the air inlet flue has a flue gas outlet, the flue gas outlet of the air inlet flue is communicated with the upper part of the ash bucket, and an inclined airflow separation plate is arranged at the upper part of the flue gas outlet of the air inlet flue so that the air inlet flue is communicated with the ash bucket and is separated from the air purification chamber.
4. The integrated dust removal and denitration device as claimed in any one of claims 1 to 3, wherein the air-purifying chamber is located above the filtering chamber, a horizontal partition pattern plate is arranged between the filtering chamber and the air-purifying chamber, the partition pattern plate is uniformly provided with a plurality of through holes for communicating the filtering chamber and the air-purifying chamber, the number of the filter bags arranged in the filtering chamber is equal to the number of the through holes, the filter bag ports of the filter bags are detachably fixed on the cross sections of the through holes, and one filter bag corresponds to one through hole.
5. The integrated dedusting and denitration device of claim 4, wherein the filter bag ash removal mechanism comprises a pulse valve, an air bag and an injection pipe which are communicated in sequence.
6. The integrated dedusting and denitration device as claimed in claim 5, wherein the injection tube is transversely arranged, a plurality of nozzles communicated with the injection tube are arranged at the lower part of the injection tube, the number of the nozzles is equal to that of the filter bags, and one nozzle is correspondingly faced to the filter bag opening of one filter bag.
7. The integrated dedusting and denitration device of any one of claims 1 to 3, wherein the filter bag is a metal filter bag.
8. The integrated dedusting and denitration device of any one of claims 1 to 3, further comprising an outlet flue, wherein the outlet flue is communicated with the denitration chamber.
9. The integrated dedusting and denitration device of any one of claims 1 to 3, wherein the denitration chamber is positioned above the air purifying chamber, and the denitration chamber is an SCR denitration reaction chamber.
10. The integrated dedusting and denitration apparatus as claimed in any one of claims 1 to 3, wherein two catalyst layers are disposed in the denitration chamber.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010396516.8A CN111644059A (en) | 2020-05-11 | 2020-05-11 | Integrative device of dust removal denitration |
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| CN202010396516.8A CN111644059A (en) | 2020-05-11 | 2020-05-11 | Integrative device of dust removal denitration |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112280929A (en) * | 2020-11-13 | 2021-01-29 | 北京京诚科林环保科技有限公司 | Ash removal device and steelmaking production line |
| CN113144771A (en) * | 2021-03-29 | 2021-07-23 | 北京科技大学 | Flue gas deacidification dust removal integrated device based on dense-phase dry tower |
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| CN113144771B (en) * | 2021-03-29 | 2024-06-04 | 北京科技大学 | Flue gas deacidification dust removal integrated device based on close coherent tower |
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