CN109621710A - Low-temperature denitrifying system and method for denitration - Google Patents
Low-temperature denitrifying system and method for denitration Download PDFInfo
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- CN109621710A CN109621710A CN201811623862.4A CN201811623862A CN109621710A CN 109621710 A CN109621710 A CN 109621710A CN 201811623862 A CN201811623862 A CN 201811623862A CN 109621710 A CN109621710 A CN 109621710A
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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
- B01D53/8621—Removing nitrogen compounds
- B01D53/8625—Nitrogen oxides
- B01D53/8631—Processes characterised by a specific device
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
- B01D50/20—Combinations of devices covered by groups B01D45/00 and B01D46/00
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- 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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Abstract
The invention discloses low-temperature denitrifying systems, comprising: desulfurizing tower, low-temperature denitration tower and gas wash tower pass sequentially through flue connection；Flue gas waste heat recovery apparatus, it includes off-gas recovery device and air preheater, the two is closely arranged side by side, the off-gas recovery device gas inlet connection boiler flue gas outlet, off-gas recovery device exhanst gas outlet are connected to desulfurizing tower gas inlet, the air preheater import is passed through normal temperature air, outlet and is connected to heat transfer sleeve by preheating pipe, the heat transfer sleeve sealing shroud is set to outside desulfurizing tower exhanst gas outlet pipeline, heat exchange of heat pipe is provided in the off-gas recovery device, perforation extends in air preheater.The invention also discloses the methods for carrying out low-temperature denitration using above-mentioned low-temperature denitrifying system.The high-temperature flue gas waste heat that the present invention can make full use of boiler to be discharged, moreover it is possible to guarantee that the flue gas for needing to carry out low-temperature denitration processing does not have to further heating and can directly carry out denitration process.
Description
Technical field
The present invention relates to boiler smoke processing technology fields.It is more particularly related to low-temperature denitrifying system and de-
Nitre method.
Background technique
With the rapid development of economy, environmental problem becomes increasingly conspicuous.In boiler smoke containing sulfur dioxide, nitrogen oxides and
The pollutants such as some dust will cause air and seriously pollute if be directly discharged in air, influence people's normally daily life
It is living.Existing boiler smoke processing generally includes desulphurization denitration dedusting three parts, and flue gas is usually to pass through at desulfurization and dedusting
Using denitration process after reason in this way, after desulfurization and dedusting is handled, temperature substantially reduces flue gas, and existing de-
Denox catalyst catalytic temperature is generally at 320 DEG C~400 DEG C, therefore flue gas will also heat up again before carrying out denitration process, greatly
The consumption for increasing energy greatly, improves the cost of fume treatment.Research about low-temperature denitration catalyst is more and more, generally
The catalytic temperature of mature low-temperature denitration catalyst can substantially reduce the consumption of energy between 200 DEG C~250 DEG C.How
On the one hand the waste heat of high-temperature flue gas is made full use of, does not on the other hand need to reheat the flue gas for carrying out denitration process again,
It is our technical problems in need of consideration.
Summary of the invention
It is an object of the present invention to provide low-temperature denitrifying system and method for denitration, the height that boiler can be made full use of to be discharged
Warm fume afterheat, moreover it is possible to guarantee that the flue gas for needing to carry out low-temperature denitration processing does not have to further heating and can directly carry out at denitration
Reason.
In order to realize these purposes and other advantages according to the present invention, low-temperature denitrifying system is provided, comprising:
Desulfurizing tower, low-temperature denitration tower and gas wash tower pass sequentially through flue connection；
Flue gas waste heat recovery apparatus comprising off-gas recovery device and air preheater, the off-gas recovery device and air are pre-
Hot device is closely arranged side by side, and the off-gas recovery device gas inlet connection boiler flue gas outlet, off-gas recovery device exhanst gas outlet connect
Unconventional sulphur tower flue gas import, the air preheater import are passed through normal temperature air, outlet and are connected to heat transfer sleeve by preheating pipe,
The heat transfer sleeve sealing shroud is set to outside desulfurizing tower exhanst gas outlet pipeline and is formed between desulfurizing tower exhanst gas outlet pipeline hollow
Cavity, heat exchange of heat pipe is provided in the off-gas recovery device, and perforation extends in air preheater.
Preferably, the flue gas waste heat recovery apparatus inner wall is provided with high-temperature-resistant thermal-insulation layer.
Preferably, the heat transfer sleeve is additionally provided with the outlet of the connection feed water system of boiler.
Preferably, the gas wash tower includes the filter chamber, cooling chamber and dirt pocket for being sequentially communicated setting from bottom to up, and three
Person's vertical axis is overlapped；
The filter chamber, one upper lateral part have gas inlet, and the filter chamber lower part is provided with ash bucket, the filter chamber
Inside is additionally provided with cartridge filter and inner cylinder, and the inner cylinder upper end opening and fixation are connected to the cooling chamber, lower ending opening was arranged
Strainer, the cartridge filter spacer sleeve are set to outside the inner cylinder, and the cartridge filter upper end is rotationally connected with the filter chamber and drop
The connecting plate upper and lower end in greenhouse is lower than the lower end of the inner cylinder and connects the taper gear cylinder that lower end has opening, the cartridge filter
It is overlapped with the axis of the filter chamber with the axis of the inner cylinder, interval is set on the circumferential direction of the filtering drum outer wall and longitudinal direction
It is equipped with multiple fins；
The cooling chamber, inside be arranged at intervals with multiple rows of cooling pipe along the vertical direction, the cooling pipe is serpentine-like and interior
Portion is connected with the cold water of flowing, and the single pipe of neighbouring row's cooling pipe is staggered；
The dirt pocket, is internally provided with dust settling pocket, and the upper end of cooling chamber described in the open communication of the dust settling pocket is opened
Mouthful, the dirt pocket side is additionally provided with exhanst gas outlet on the top of dust settling pocket.
Preferably, the outer wall of the inner cylinder is provided with columnar air bag, and inner wall is fixed on the outer of the inner cylinder
Wall, the outer wall of the air bag are covered with bristle, are provided with inflating port on the air bag, when being completely filled with gas in air bag
When, the bristle on air bag is tight against the cartridge filter inner wall.
Preferably, there is vertical hollow cavity, the axis weight of axis and the cooling chamber inside the cooling chamber
It closes, the cooling pipe level is fixed on hollow cavity inner wall, and the hollow cavity inner wall concaves between adjacent cooling pipe
It falls into and forms opposite a pair of of sliding slot, be inside combined with gas tube, the inflation pipe outer wall is covered with bristle, when complete in gas tube
When full of gas, up and down respectively tight against upper and lower cooling pipe outer wall, described gas tube one end seals and passes through cunning the bristle on gas tube
Block is snug fit in a wherein sliding slot, the other end is provided with the inflating port for being connected to external inflation equipment, and the gas tube is another
End outer cover is equipped with the sliding block for being snug fit at another sliding slot.
Preferably, the sliding block all has the protrusion protruded from outside sliding slot, and the sliding block protrusion of same vertical side passes through
Vertical connecting rod is connected as one, and the connecting rod is moved back and forth by oil cylinder driving.
Preferably, the dust settling pocket lower ending opening is fixed on dirt pocket bottom surface, outside the dust settling pocket lower ending opening also
Multiple airsac tubes are provided with, annular space, which is set on the dust settling pocket outer wall, is used to support the dust settling pocket, the dedusting
Interior is additionally provided with sleeve-shaped gasbag, is located at the dust settling pocket outer ring, and the gasbag outer wall is fixed on the dirt pocket
Inner wall, the gasbag inner wall, which also penetrates through, is connected with multiple air bag posts, sets along the annular of gasbag inner wall and longitudinal interval
Set multiple, when being completely filled with gas in gasbag, the length of the air bag post is all larger than the dust settling pocket outer wall and the air bag
Spacing between bag inner wall, the gasbag have inflating port.
The present invention also provides a kind of low-temperature denitration method, boiler smoke passes sequentially through the flue gas in above-mentioned low-temperature denitrifying system
Waste-heat recovery device, desulfurizing tower, low-temperature denitration tower and gas wash tower carry out low-temperature denitration.
The present invention is include at least the following beneficial effects:
1, denitrating system of the invention and method of denitration make full use of recycling high-temperature flue gas by flue gas waste heat recovery apparatus
Waste heat is recycled, moreover it is possible to so that needing the flue gas for carrying out low-temperature denitration processing not have to further heating can directly carry out
Denitration process greatly reduces the consumption of energy, reduces the cost of fume treatment.
2, on the one hand gas wash tower of the invention can make full use of the waste heat of flue gas, on the other hand can also carry out to flue gas abundant
Dedusting, clear dirt can also be carried out to gas wash tower inside.
Further advantage, target and feature of the invention will be partially reflected by the following instructions, and part will also be by this
The research and practice of invention and be understood by the person skilled in the art.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of denitrating system of the present invention；
Fig. 2 is the structural schematic diagram of gas wash tower of the present invention；
Fig. 3 is the top view of cooling pipe of the present invention；
Fig. 4 is the top view of gasbag of the present invention.
Description of symbols:
1, off-gas recovery device, 2, air preheater, 3, heat exchange of heat pipe, 4, preheating pipe, 5, heat transfer sleeve, 6, filtering
Room, 601, ash bucket, 602, cartridge filter, 603, inner cylinder, 604, fin, 605, air bag, 606, filter screen, 607, connecting plate,
608, cylinder is kept off, 7, cooling chamber, 701, cooling pipe, 702, hollow cavity, 703, gas tube, 704, sliding block, 705, connecting rod, 8, remove
Dirt room, 801, dust settling pocket, 802, airsac tube, 803, gasbag, 804, air bag post.
Specific embodiment
Present invention will be described in further detail below with reference to the accompanying drawings, to enable those skilled in the art referring to specification text
Word can be implemented accordingly.
It should be noted that experimental method described in following embodiments is unless otherwise specified conventional method, institute
Reagent and material are stated, unless otherwise specified, is commercially obtained；In the description of the present invention, term " transverse direction ", " vertical
To ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", the instructions such as "outside" side
Position or positional relationship are to be based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description of the present invention and simplification of the description,
It is not that the device of indication or suggestion meaning or element must have a particular orientation, be constructed and operated in a specific orientation, because
This is not considered as limiting the invention.
As shown in Figure 1, the present invention provides a kind of low-temperature denitrifying system, comprising: desulfurizing tower, low-temperature denitration tower and gas wash tower,
It passes sequentially through flue connection；Flue gas waste heat recovery apparatus comprising off-gas recovery device 1 and air preheater 2, the cigarette
Gas recover 1 and air preheater 2 are closely arranged side by side, and 1 gas inlet of off-gas recovery device is connected to boiler flue gas outlet, cigarette
1 exhanst gas outlet of gas recover is connected to desulfurizing tower gas inlet, and 2 import of air preheater is passed through normal temperature air, outlet passes through
The connection heat transfer sleeve 5 of preheating pipe 4,5 sealing shroud of heat transfer sleeve is set to outside desulfurizing tower exhanst gas outlet pipeline and and desulfurizing tower
Hollow cavity 702 is formed between exhanst gas outlet pipeline, heat exchange of heat pipe 3 is provided in the off-gas recovery device 1, and perforation extends
To air preheater 2.The flue gas waste heat recovery apparatus inner wall is provided with high-temperature-resistant thermal-insulation layer.The heat transfer sleeve 5 is also
It is provided with the outlet of the connection feed water system of boiler.
In the above-mentioned technical solutions, in a kind of embodiment, the high-temperature flue-gas being discharged from boiler is 800 DEG C or so, from
Left side becomes 150 DEG C or so after heat exchange of heat pipe 3, and the desulfurizing tower into right side carries out desulfurization, and lower section off-gas recovery device 1
Middle heat exchange of heat pipe 3 absorbs the heat transfer of high-temperature flue gas to heat exchange of heat pipe 3 in upper air preheater 2, normal temperature air from
After left side enters air preheater 2, after being absorbed heat by heat exchange of heat pipe 3, temperature becomes 400 DEG C or so, using economizer bank
Road 4 is circulated in heat transfer sleeve 5；Flue gas its temperature after desulfurizing tower is handled is insufficient for the temperature of low-temperature denitration tower, low
Preferably at 200 DEG C~250 DEG C, low-temperature denitration is high-efficient at a temperature of this for the temperature of warm denitration；Therefore flue gas is handled by desulfurizing tower
It heats up using the heat transfer of heat transfer sleeve 5 afterwards, finally enters denitrating tower and carries out low-temperature denitration, and temperature can be met the requirements,
The waste heat of the high-temperature flue gas of boiler discharge is taken full advantage of, the hot-air in the sleeve 5 that in addition conducts heat can also be again to the water supply of boiler
System heat supply.Flue gas waste heat recovery apparatus inner wall is provided with high-temperature-resistant thermal-insulation layer, can further decrease the loss of heat.In addition
Gas wash tower is arranged in behind low-temperature denitration tower, the temperature loss that flue gas is finally circulated to low-temperature denitration tower on the one hand can be reduced,
On the other hand it can reduce the length of preheating pipe 4, to reduce the thermal loss of high-temperature flue gas waste heat recycling.
In another technical solution, as shown in Figures 2 to 4, the gas wash tower includes being sequentially communicated setting from bottom to up
Filter chamber 6, cooling chamber 7 and dirt pocket 8, three's vertical axis are overlapped；The filter chamber 6, one upper lateral part have gas inlet,
6 lower part of filter chamber is provided with ash bucket 601, and cartridge filter 602 and inner cylinder 603 are additionally provided with inside the filter chamber 6, described interior
603 upper end openings of cylinder and the fixed connection cooling chamber 7, lower ending opening setting filter screen 606,602 spacer sleeve of cartridge filter
Outside the inner cylinder 603, and 602 upper end of the cartridge filter is rotationally connected with the connecting plate of the filter chamber 6 and cooling chamber 7
607 upper and lower ends are lower than the lower end of the inner cylinder 603 and connect the taper gear cylinder 608 that lower end has opening, the cartridge filter 602
It is overlapped with the axis of the filter chamber 6 with the axis of the inner cylinder 603, on the circumferential direction of 602 outer wall of cartridge filter and longitudinal direction
It is arranged at intervals with multiple fins 604；The cooling chamber 7, inside be arranged at intervals with multiple rows of cooling pipe 701 along the vertical direction,
The cooling pipe 701 is serpentine-like and the internal cold water for being connected with flowing, the single pipe of neighbouring row's cooling pipe 701 are staggered；
The dirt pocket 8, is internally provided with dust settling pocket 801, and the upper end of cooling chamber 7 described in the open communication of the dust settling pocket 801 is opened
Mouthful, 8 side of dirt pocket is additionally provided with exhanst gas outlet on the top of dust settling pocket 801.
In the above-mentioned technical solutions, its temperature of flue gas being discharged from low-temperature denitration tower is still big compared with high and dustiness, cannot
Direct emission, higher flue gas uses bag-type dusting, destructive larger, and if directly adopt spray for dust suppression, and be unable to fully
Using the energy of high-temperature flue gas, in addition in dust removal process, by prolonged dedusting, if the cleaning without dust, is removed
Dirt efficiency can have a greatly reduced quality again over time, it is therefore desirable to design a kind of better gas wash tower to meet needs.This hair
The gas wash tower overall structure of bright design is set as cube, can preferably carry out the setting of cooling pipe 701 and gas tube 703 and make
With.
Flue gas is after the entrance of the gas inlet on 6 top of filter chamber, under the rotary action of cartridge filter 602, in filter chamber 6
Air flows, and flue gas is enabled to be rapidly introduced into filter chamber 6, and flue gas first carries out preliminary mistake under the action of cartridge filter 602
Filter, then flows downward, then is entered by 603 lower part of inner cylinder, flows to cooling chamber 7.The fin 604 being arranged outside cartridge filter 602
It can accelerate the flowing of air, while can also be intercepted the part dirt in flue gas by the shock with flue gas；602 lower part of cartridge filter connects
The shelves cylinder of taper is connect, while 6 lower part of filter chamber is also configured as taper, is conducive to filtered dirt free skating and drops down onto ash bucket 601.
The flue gas for flowing to cooling chamber 7 continues up flowing, successively cools down by cooling pipe 701, passes through import in cooling pipe 701
It is continually fed into the cold water of flowing, after flue gas passes through, cold water heating water can be used for other devices by exporting outflow, make full use of
The waste heat of flue gas, moreover it is possible to by the steady decrease of flue gas, to prevent flue-gas temperature higher, destroy dust settling pocket 801；By multiple rows of
Flue gas after the cooling of cooling pipe 701 passes through dust settling pocket 801 again and carries out further dedusting, is then discharged from exhanst gas outlet.Cooling
Pipe 701 is set as serpentine configuration as shown in Figure 3, settable closeer, the effect to be cooled down with increase of the spacing between adjacent single tube
Fruit, the single tube in addition arranged up and down are staggered, and the cooling effect of flue gas is more preferable.
In another technical solution, the outer wall of the inner cylinder 603 is provided with columnar air bag 605, and inner wall is solid
Due to the outer wall of the inner cylinder 603, the outer wall of the air bag 605 is covered with bristle, is provided with inflation on the air bag 605
Mouthful, when being completely filled with gas in air bag 605, the bristle on air bag 605 is tight against 602 inner wall of cartridge filter.
In the above-mentioned technical solutions, it is provided with air bag 605 outside inner cylinder 603, when carrying out primary filtration, air bag 605
For unaerated state, flue gas is not interfered to flow between inner cylinder 603 and cartridge filter 602, the inflating port on air bag 605 passes through one
Charger outside root canal connection has been stained with dirt on cartridge filter 602, will affect after cartridge filter 602 filters a period of time
Effect is filtered, therefore air bag 605 is inflated, after being full of gas, the bristle on air bag 605 is tight against cartridge filter 602, at this time
Both forward and reverse directions rotate cartridge filter 602, by bristle on air bag 605 and the contact of cartridge filter 602, to the progress of cartridge filter 602
A degree of cleaning, to improve the filter effect of cartridge filter 602.
In another technical solution, inside the cooling chamber 7 have vertical hollow cavity 702, axis with it is described
The axis of cooling chamber 7 is overlapped, and 701 level of cooling pipe is fixed on 702 inner wall of hollow cavity, 702 inner wall of hollow cavity
It is recessed inwardly to form opposite a pair of of sliding slot between adjacent cooling pipe 701, is inside combined with gas tube 703, the inflation
703 outer wall of pipe is covered with bristle, and when being completely filled with gas in gas tube 703, the bristle on gas tube 703 is up and down respectively tight against upper
Lower 701 outer wall of cooling pipe, described 703 one end of gas tube seal and are snug fit in a wherein sliding slot by sliding block 704, are another
End is provided with the inflating port of connection external inflation equipment, and 703 other end outer cover of gas tube is another equipped with being snug fit at
The sliding block 704 of sliding slot.The sliding block 704 all has the protrusion protruded from outside sliding slot, and 704 protrusion of sliding block of same vertical side is logical
It crosses vertical connecting rod 705 to be connected as one, the connecting rod 705 is moved back and forth by oil cylinder driving.
In the above-mentioned technical solutions, flue gas can be stained with dirt for a long time after the cooling of cooling pipe 701 in cooling pipe 701, because
This is cleared up, it is ensured that the cooling effect of cooling pipe 701.An inflation is provided between adjacent cooling pipe 701
Pipe 703, when without cleaning, gas tube 703 is non-aerating, and when being cleared up, gas tube 703 is full of gas, then passes through connecting rod
705 drive carries out horizontal movement, to slide between cooling pipe 701 back and forth, the bristle on gas tube 703 can be to cooling
Pipe 701 is cleared up.In addition during flue gas flows up, it can also be stained with dirt on gas tube 703, and pass through gas tube
703 inflation deflation can shake off dirt thereon.
In another technical solution, 801 lower ending opening of dust settling pocket is fixed on 8 bottom surface of dirt pocket, in the dedusting
Multiple airsac tubes 802 are additionally provided with outside 801 lower ending openings of bag, annular space is set on 801 outer wall of dust settling pocket and is used for
The dust settling pocket 801 is supported, is additionally provided with sleeve-shaped gasbag 803 in the dirt pocket 8, is located at outside the dust settling pocket 801
Circle, 803 outer wall of gasbag are fixed on 8 inner wall of dirt pocket, and 803 inner wall of gasbag, which also penetrates through, is connected with multiple gas
Capsule column 804, it is multiple along the annular of 803 inner wall of gasbag and longitudinal interval setting, when being completely filled with gas in gasbag 803
When, the length of the air bag post 804 is all larger than the spacing between 803 inner wall of 801 outer wall of dust settling pocket and the gasbag, institute
Gasbag 803 is stated with inflating port.
In the above-mentioned technical solutions, dust settling pocket 801 is after dedusting after a period of time, it is also desirable to be cleared up.Gas first
The inflation deflation of capsule pipe 802 can lead to standing upright and relaxing for dust settling pocket 801, to realize that dirt is shaked off in the shake of dust settling pocket 801；Separately
Outside, after airsac tube 802 is full of gas, then gasbag 803 is inflated, the fast aeration of gasbag 803, so that air bag post 804
It quickly stands upright, so that flying hit dust settling pocket 801, realizes the clear dirt of vibration of dust settling pocket 801.
The present invention also provides a kind of low-temperature denitration method, boiler smoke passes sequentially through the flue gas in above-mentioned low-temperature denitrifying system
Waste-heat recovery device, desulfurizing tower, low-temperature denitration tower and gas wash tower carry out low-temperature denitration.
Although the embodiments of the present invention have been disclosed as above, but its is not only in the description and the implementation listed
With it can be fully applied to various fields suitable for the present invention, for those skilled in the art, can be easily
Realize other modification, therefore without departing from the general concept defined in the claims and the equivalent scope, the present invention is simultaneously unlimited
In specific details and legend shown and described herein.
Claims (9)
1. low-temperature denitrifying system characterized by comprising
Desulfurizing tower, low-temperature denitration tower and gas wash tower pass sequentially through flue connection；
Flue gas waste heat recovery apparatus comprising off-gas recovery device and air preheater, the off-gas recovery device and air preheater
Closely it is arranged side by side, the off-gas recovery device gas inlet connection boiler flue gas outlet, the connection of off-gas recovery device exhanst gas outlet are de-
Sulphur tower flue gas import, the air preheater import is passed through normal temperature air, outlet and is connected to heat transfer sleeve by preheating pipe, described
Heat transfer sleeve sealing shroud is set to outside desulfurizing tower exhanst gas outlet pipeline and forms hollow cavity between desulfurizing tower exhanst gas outlet pipeline,
Heat exchange of heat pipe is provided in the off-gas recovery device, perforation extends in air preheater.
2. low-temperature denitrifying system as described in claim 1, which is characterized in that the flue gas waste heat recovery apparatus inner wall is respectively provided with
There is high-temperature-resistant thermal-insulation layer.
3. low-temperature denitrifying system as described in claim 1, which is characterized in that the heat transfer sleeve be additionally provided with connection boiler to
The outlet of water system.
4. low-temperature denitrifying system as described in claim 1, which is characterized in that the gas wash tower includes being sequentially communicated from bottom to up
Filter chamber, cooling chamber and the dirt pocket of setting, three's vertical axis are overlapped；
The filter chamber, one upper lateral part have gas inlet, and the filter chamber lower part is provided with ash bucket, inside the filter chamber
It is additionally provided with cartridge filter and inner cylinder, the inner cylinder upper end opening and the fixed connection cooling chamber, lower ending opening setting filter screen,
The cartridge filter spacer sleeve is set to outside the inner cylinder, and the cartridge filter upper end is rotationally connected with the filter chamber and cooling chamber
Connecting plate upper and lower end lower than the inner cylinder lower end and connect lower end have opening taper gear cylinder, the cartridge filter with it is described
The axis of inner cylinder is overlapped with the axis of the filter chamber, is arranged at intervals on the circumferential direction of the filtering drum outer wall and longitudinal direction more
A fin；
The cooling chamber, inside be arranged at intervals with multiple rows of cooling pipe along the vertical direction, the cooling pipe is serpentine-like and internal logical
There is the cold water of flowing, the single pipe of neighbouring row's cooling pipe is staggered；
The dirt pocket is internally provided with dust settling pocket, the upper end opening of cooling chamber described in the open communication of the dust settling pocket, institute
It states dirt pocket side and is additionally provided with exhanst gas outlet on the top of dust settling pocket.
5. low-temperature denitrifying system as claimed in claim 4, which is characterized in that the outer wall of the inner cylinder is provided with columnar fill
Airbag, inner wall are fixed on the outer wall of the inner cylinder, and the outer wall of the air bag is covered with bristle, is provided on the air bag
Inflating port, when being completely filled with gas in air bag, the bristle on air bag is tight against the cartridge filter inner wall.
6. low-temperature denitrifying system as claimed in claim 4, which is characterized in that have vertical hollow cavity inside the cooling chamber
Body, axis are overlapped with the axis of the cooling chamber, and the cooling pipe level is fixed on hollow cavity inner wall, the hollow cavity
Inner wall is recessed inwardly to form opposite a pair of of sliding slot between adjacent cooling pipe, is inside combined with gas tube, the gas tube
Outer wall is covered with bristle, when being completely filled with gas in gas tube, bristle on gas tube up and down respectively tight against upper and lower cooling pipe outside
Wall, described gas tube one end seals and is snug fit in a wherein sliding slot by sliding block, the other end is provided with connection outside and fills
The inflating port of gas equipment, the gas tube other end outer cover are equipped with the sliding block for being snug fit at another sliding slot.
7. low-temperature denitrifying system as claimed in claim 6, which is characterized in that the sliding block all have protrude from it is convex outside sliding slot
Rise, the sliding block protrusion of same vertical side is connected as one by vertical connecting rod, the connecting rod by oil cylinder driving come
Return is dynamic.
8. low-temperature denitrifying system as claimed in claim 4, which is characterized in that the dust settling pocket lower ending opening is fixed on dirt pocket
Bottom surface, is additionally provided with multiple airsac tubes outside the dust settling pocket lower ending opening, and annular space is set to the dust settling pocket outer wall
On be used to support the dust settling pocket, sleeve-shaped gasbag is additionally provided in the dirt pocket, be located at the dust settling pocket outer ring, institute
It states gasbag outer wall and is fixed on the dedusting chamber interior walls, the gasbag inner wall, which also penetrates through, is connected with multiple air bag posts, along gas
The annular of capsular bag inner wall and longitudinal interval setting are multiple, and when being completely filled with gas in gasbag, the length of the air bag post is equal
Greater than the spacing between the dust settling pocket outer wall and the gasbag inner wall, the gasbag has inflating port.
9. low-temperature denitration method, which is characterized in that boiler smoke passes sequentially through the fume afterheat in above-mentioned low-temperature denitrifying system and returns
Receiving apparatus, desulfurizing tower, low-temperature denitration tower and gas wash tower carry out low-temperature denitration.
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| CN201811623862.4A CN109621710B (en) | 2018-12-28 | 2018-12-28 | Low-temperature denitration system and denitration method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111632494A (en) * | 2020-05-27 | 2020-09-08 | 南通中船机械制造有限公司 | Desulfurization and denitrification system based on electrolyzed seawater and process thereof |
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| CN109621710B (en) | 2021-07-13 |
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