CN109990266A - A kind of high temperature denitration, fly-ash reburning, boiler having dust removed inside - Google Patents
A kind of high temperature denitration, fly-ash reburning, boiler having dust removed inside Download PDFInfo
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- CN109990266A CN109990266A CN201711500087.9A CN201711500087A CN109990266A CN 109990266 A CN109990266 A CN 109990266A CN 201711500087 A CN201711500087 A CN 201711500087A CN 109990266 A CN109990266 A CN 109990266A
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- boiler
- dust
- flue
- screen
- light pipe
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- 239000000428 dust Substances 0.000 title claims abstract description 100
- 239000010881 fly ash Substances 0.000 title abstract description 7
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims abstract description 95
- 239000003546 flue gas Substances 0.000 claims abstract description 95
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims abstract description 52
- 239000004202 carbamide Substances 0.000 claims abstract description 52
- 239000003500 flue dust Substances 0.000 claims abstract description 51
- 238000002485 combustion reaction Methods 0.000 claims abstract description 29
- 235000019504 cigarettes Nutrition 0.000 claims abstract description 8
- 241001482108 Alosa pseudoharengus Species 0.000 claims description 48
- 239000000779 smoke Substances 0.000 claims description 28
- 239000004071 soot Substances 0.000 claims description 23
- 230000000391 smoking effect Effects 0.000 claims description 22
- 239000008187 granular material Substances 0.000 claims description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 17
- 238000013016 damping Methods 0.000 claims description 16
- 230000004308 accommodation Effects 0.000 claims description 14
- 238000000926 separation method Methods 0.000 claims description 13
- 230000005484 gravity Effects 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 9
- 229910000831 Steel Inorganic materials 0.000 claims description 8
- 239000010959 steel Substances 0.000 claims description 8
- 238000003860 storage Methods 0.000 claims description 8
- 239000012528 membrane Substances 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 4
- 238000007689 inspection Methods 0.000 claims description 4
- 210000001520 comb Anatomy 0.000 claims description 3
- 239000007789 gas Substances 0.000 claims description 3
- 238000010304 firing Methods 0.000 claims description 2
- 239000002956 ash Substances 0.000 abstract description 7
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 35
- 238000006722 reduction reaction Methods 0.000 description 11
- 238000006243 chemical reaction Methods 0.000 description 9
- 230000000694 effects Effects 0.000 description 9
- 239000007788 liquid Substances 0.000 description 7
- 230000035484 reaction time Effects 0.000 description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- 239000000446 fuel Substances 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 230000001154 acute effect Effects 0.000 description 4
- 229910052799 carbon Inorganic materials 0.000 description 4
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 239000001301 oxygen Substances 0.000 description 3
- 229910052760 oxygen Inorganic materials 0.000 description 3
- 238000013517 stratification Methods 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 230000003197 catalytic effect Effects 0.000 description 2
- 238000010531 catalytic reduction reaction Methods 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 1
- 101150097977 arch-1 gene Proteins 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 210000000038 chest Anatomy 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- DOTMOQHOJINYBL-UHFFFAOYSA-N molecular nitrogen;molecular oxygen Chemical compound N#N.O=O DOTMOQHOJINYBL-UHFFFAOYSA-N 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23B—METHODS OR APPARATUS FOR COMBUSTION USING ONLY SOLID FUEL
- F23B80/00—Combustion apparatus characterised by means creating a distinct flow path for flue gases or for non-combusted gases given off by the fuel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J11/00—Devices for conducting smoke or fumes, e.g. flues
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/003—Arrangements of devices for treating smoke or fumes for supplying chemicals to fumes, e.g. using injection devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/006—Layout of treatment plant
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
- F23J15/022—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
- F23M5/00—Casings; Linings; Walls
- F23M5/08—Cooling thereof; Tube walls
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J2215/00—Preventing emissions
- F23J2215/10—Nitrogen; Compounds thereof
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J2217/00—Intercepting solids
- F23J2217/20—Intercepting solids by baffles
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J2219/00—Treatment devices
- F23J2219/10—Catalytic reduction devices
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chimneys And Flues (AREA)
Abstract
The present invention provides a kind of high temperature denitrations, fly-ash reburning, boiler having dust removed inside, it is with combustion chamber, burner hearth and the long cavum laryngis for connecting the combustion chamber and the burner hearth, the long cavum laryngis narrows relative to the combustion chamber and the section of burner hearth and with 1 meter to 4 meters of height, and the boiler its also there is the urea spout positioned close to long cavum laryngis and burner hearth intersection.In addition, the burner hearth is limited by the preceding screen of the front wall of the boiler, Zuo Qiang, right wall and specific shape, before described screen with Zuo Qiang, right wall is substantially vertical and extends to You Qiang from Zuo Qiang, and upper end is connected to the drum in boiler crown wall, screen lower collecting box before lower end is connected to；This part of the restriction burner hearth shielded before described forms inner fovea part of the concave surface towards the front wall, thus extends the travel path of flue gas.Furthermore, boiler includes the horizontal flue with roof of the furnace connection, the boiler has the groove profile segregator being located in the horizontal flue, the groove profile segregator arranged beneath has flue-dust retainer, the flue-dust retainer can rekindle selectively with the burner hearth connection so that the cigarette ash of collection is sent into burner hearth.
Description
Technical field
The present invention relates to a kind of boiler, especially a kind of high temperature denitration, fly-ash reburning, boiler having dust removed inside.
Background technique
Nitrogen oxides (NOx) is one of the nuisance that boiler is discharged with cigarette, and the control to NOx emission is current protection atmosphere
One of most important measure of environment.Following manner is generallyd use for the control of NOx, first is that with fuel-rich, weary oxygen in burning
Method reduce ignition temperature come reduce heating power type nitrogen generate NOx amount；Second is that carrying out non-catalytic reduction to the flue gas containing NOx
Processing, generates the nitrogen and water of nonhazardous；Third is that carrying out catalytic treatment to low-temperature flue gas (at 350 DEG C).
From economic, convenient, practical angle is applied, in burning, control NOx generation amount is optimal selection, can be mitigated in this way
The burden such as difficulty, complexity and economic cost to fume treatment.Layer burner has fuel stratification, sky simultaneously on combustion system
The innate advantage of gas layering, weary oxygen Combustion Energy controls NOx in 250-350mg/m under the premise of can guarantee not cutoff3Hereinafter,
Spraying into aqueous solution of urea in flue gas again and carrying out non-catalytic reduction is that can reach state key area NOx emission standard or more high standard
It is quasi-.
Currently, the method for the spray urea reduction NOx generallyd use is in roof of the furnace or in back-end surfaces i.e. economizer
Urea liquid is sprayed into the flue in proparea and carries out denitration, and there are low (the separate optimum temperatures of the temperature of reduction reaction for this mode
800-950 DEG C), the NOx and urea concentration that the time of reaction, space, path are limited and escape are high and cannot reach ideal denitration
Effect, and soot dust granule humidifying can be will cause economizer tail by the water in the water and urea liquid generated during the reaction
The serious bonded deposit of portion's heating surface, less serious case block heat exchange, and severe one blocks economizer.In addition, in the method drop with fuel-rich, weary oxygen
In the case that low combustion temperature generates the amount of NOx to reduce heating power type nitrogen, the uncompleted burned carbon in flue gas increases, to cause to fire
Efficiency decline is burnt, energy consumption increases.
Therefore, it is welcome for being able to solve technical solution any in above-mentioned technical problem.
Summary of the invention
The present invention is directed to solve the deficiency of background technique.
One, in denitration, urea spout is moved forward into burner hearth inlet to greatest extent, thus extends the reaction of denitration reaction
Time simultaneously to be more fully mixed.In addition, long cavum laryngis is arranged by urea spout by being arranged between combustion chamber and burner hearth
The flue-gas temperature at place is controlled in 800-950 DEG C of range of best reduction reaction temperature, in this way optimizes the temperature of denitration reaction, separately
Outside, by construct burner hearth profile so that further extend flue gas travel path, increase the reaction time, and make flue gas and
Urea is more fully mixed.In addition, being remixed by the way that groove profile segregator is mandatory to remaining urea and NOx, it is greatly lowered
The concentration of escape makes denitration more sufficiently effectively.
Two, it is not burnt on carbon in reducing flying dust, by groove profile segregator, flue flue-dust retainer, flying dust is returned into burner hearth again
Combustion, then do not burn carbon caused by avoiding due to low-temperature burning and lose with plume, be improved efficiency of combustion.
Three, on reducing the viscous grey dust stratification in economizer tail portion caused by humidifying flue gas, by being arranged in specific shape
Shielding afterwards makes soot dust granule be separated slag input slot side by side under inertia force, centrifugal force effect the water conservancy diversion of flue gas, both subtracts in this way
Lack viscous ash, dust stratification retardance heat exchange, and considerably reduces the original dust exhausting concentration of boiler.
Four, it is guarantee urea spout not by high temperature scaling loss, spout is mounted in the header of front wall, is allowed to be in working-medium water
Among cold, avoid being interrupted denitration because of scaling loss.
According to the first aspect of the invention, a kind of boiler is provided, there is combustion chamber, burner hearth, which is characterized in that described
Boiler further includes the long cavum laryngis for connecting the combustion chamber and the burner hearth, and the long cavum laryngis is relative to the combustion chamber and the furnace
Thorax narrowed cross section and with 1 meter to 4 meters of height, and the boiler its also have and positioned close to long cavum laryngis and burner hearth intersection
Urea spout.
In a feasible embodiment, the section of the long cavum laryngis is rectangle.
In a feasible embodiment, the section of the long cavum laryngis is in a zigzag.
In a feasible embodiment, the urea notch setting is in the header of boiler front wall, to utilize connection
Working-medium water realizes cooling in case.
In a feasible embodiment, the urea spout slightly raises up or the pipe of the header horizontally across front wall
Wall, and its front end extends in burner hearth.
In a feasible embodiment, the boiler have with boiler Zuo Qiang, right wall is substantially vertical and prolongs from Zuo Qiang
The preceding screen of the specific shape of right wall is extended to, the upper end shielded before described is connected to the drum in boiler crown wall, and lower end is connected to preceding screen
In header；The combustion chamber, the burner hearth and the long cavum laryngis by the front wall of the boiler, Zuo Qiang, right wall and it is described before
Screen limits.
In a feasible embodiment, before this part of the restriction burner hearth shielded before described forms concave surface towards boiler
Thus the inner fovea part of wall extends the travel path of flue gas.
In a feasible embodiment, the cross section of the inner fovea part is arc or fold-line-shaped.
In a feasible embodiment, the inner fovea part includes vertical section, the first tilting section and the second tilting section, and
The lower end of one tilting section and the upper end of vertical section are continuous, and the upper end of the second tilting section and the lower end of vertical section are continuous.
In a feasible embodiment, the boiler has the horizontal flue with roof of the furnace connection, so that
Flue gas horizontal after travelling upwardly along the inner fovea part of the preceding screen can advance, so that the flue gas travel path of S-shaped is formed, by
This further extends the travel path of flue gas.
In a feasible embodiment, the boiler also has with boiler Zuo Qiang, right wall is substantially vertical and from Zuo Qiang
The rear screen of the specific shape of right wall is extended to, the upper end shielded after described is connected to the drum in boiler crown wall, and lower end is connected to pot
The lower collecting box of wall after furnace.
In a feasible embodiment, the boiler has groove profile segregator, and groove profile segregator is connected to the pot
Cylinder and be arranged in as the preceding screen upper end and it is described after defined by the upper end shielded in space, it is described before screen and it is described after shield
Upper end all has respective first light pipe grid section.
In a feasible embodiment, it is described before screen have be located at below its first light pipe grid section and with first light
The non-light pipe grid section of pipe grid section continuous first, it is described after screen also have be located at below its first light pipe grid section and with first light pipe
The non-light pipe grid section of grid section continuous first, the preceding first non-light pipe grid section shielded and the first non-light pipe grid section shielded afterwards define
Flue-dust retainer.
In a feasible embodiment, it is described before screen and it is described after screen also define it is below flue-dust retainer, and
The gray back room of flue-dust retainer connection.
In a feasible embodiment, gravity flap valve, the bottom of gray back room are provided at the top of the gray back room
It is limited by gray back guide plate shield after being extended to from the preceding screen, inclined, and the preceding screen is adjacent with the gray back guide plate
The position of top has the second light pipe grid section to provide gray back mouth, thus when the flue dust collected in the flue-dust retainer reaches gravity
When flap valve threshold value, flap valve overturning, flue dust falls to gray back guide plate and then enters via gray back mouth by the preceding screen and boiler
The burner hearth that front wall limits.
In a feasible embodiment, screen is also defined below the gray back room after shielding before described and is described
, economizer accommodation space for arranging economizer, the economizer accommodation space and the gray back room are by the gray back
Guide plate is spatially isolated from one another, shields after described and is formed with smoke inlet on the part for limiting the economizer accommodation space.
In a feasible embodiment, the bottom of the groove profile segregator is connected with multiple flue gas damping sheets, flue gas
Damping sheet with boiler Zuo Qiang, right wall is substantially vertical and extends to You Qiang, the first non-light pipe grid section on bottom edge and preceding screen from Zuo Qiang
Relatively and with it with predetermined gap, the gap provides flue gas damping, to force flue gas in the first light for passing through the preceding screen
The groove profile segregator is passed through after pipe grid section to advance towards the rear first light pipe grid section shielded, rather than is separated around groove profile
Device.
In a feasible embodiment, the rear screen has and the described first non-continuous second light pipe of light pipe grid section
Grid section, the second light pipe grid section limit the smoke inlet, the smoke inlet than the first light pipe grid section for shielding after described with
The engaging portion of first non-light pipe grid section wall after boiler, so that flue gas is impacted by the horizontal flue
The smoke inlet is oliquely downward traveled into after wall afterwards.
In a feasible embodiment, the side of wall after the close boiler of the smoke inlet is shielded after described and is provided with
Dust board.
In a feasible embodiment, the dust board and boiler Zuo Qiang, right wall is substantially vertical and extends from left wall
To right wall.
In a feasible embodiment, the space after shielding after described and is described between wall forms flue dust separation chamber,
The flue dust separation chamber is for collecting the soot dust granule separated with flue gas.
In a feasible embodiment, the third light pipe grid section having positioned at its lower end is shielded after described, it is described
Third light pipe grid section provides the dust collecting opening of the flue dust separation chamber.
In a feasible embodiment, the lid that the bottom connection one of the dust collecting opening can be opened and closed, Huo Zhelian
A comb shape dedusting smoking box, generally comb shape are connect, a row of combs dentation dust flue with top dust hopper and lower part, institute
It states dust hopper and limits dust storage chamber, the dust flue limits dust discharge access, and the dust storage chamber and the dust discharge access are communicating together, institute
It states comb teeth-shaped dust flue to be separated from each other to limit smoke outlet, the boiler, which has, to be set to below the comb shape dedusting smoking box
Sink, dust flue immerse sink in realize water seal, thus when in use, soot dust granule via dust collecting opening, comb shape dedusting arrange
Dust hopper, the dust flue of smoke box fall to sink.
In a feasible embodiment, the dedusting smoking box is the tank body as made of welded steel plate, and outside
Siding is equipped with inspection door to be opened/closed.
In a feasible embodiment, the comb shape dedusting smoking box is also used as boiler exterior wall.
According to the second aspect of the invention, a kind of boiler is provided, with urea spout, the urea notch setting
In the header of boiler front wall, to realize cooling using working-medium water in header.
In a feasible embodiment, the urea spout slightly raises up or the pipe of the header horizontally across front wall
Wall, and its front end extends in burner hearth.
According to the third aspect of the present invention, a kind of boiler is provided, with burner hearth, wherein the burner hearth is by described
The front wall of boiler, Zuo Qiang, right wall and specific shape preceding screen limit, it is described before screen and Zuo Qiang, right wall it is substantially vertical and from a left side
Wall extends to You Qiang, and upper end is connected to the drum in boiler crown wall, and lower collecting box is shielded before being connected in lower end；In the restriction of front wall
Urea spout is provided in the part of burner hearth, this part of the restriction burner hearth shielded before described forms concave surface towards in the front wall
Thus recess portion extends the travel path of flue gas.
In a feasible embodiment, the cross section of the inner fovea part is arc or fold-line-shaped.
In a feasible embodiment, the inner fovea part includes vertical section, the first tilting section and the second tilting section, and
The lower end of one tilting section and the upper end of vertical section are continuous, and the upper end of the second tilting section and the lower end of vertical section are continuous.
In a feasible embodiment, the boiler has the horizontal flue with roof of the furnace connection, so that
Flue gas horizontal after travelling upwardly along the inner fovea part of the preceding screen can advance, so that the flue gas travel path of S-shaped is formed, by
This further extends the travel path of flue gas.
According to the fourth aspect of the present invention, a kind of boiler is provided, the water including burner hearth and with roof of the furnace connection
Flat flue, the boiler have the groove profile segregator being located in the horizontal flue, and the groove profile segregator arranged beneath has collection
Ash bucket, the flue-dust retainer can rekindle selectively with the burner hearth connection so that the cigarette ash of collection is sent into burner hearth.
In a feasible embodiment, the boiler have with boiler Zuo Qiang, right wall is substantially vertical and prolongs from Zuo Qiang
The preceding screen of the specific shape of right wall is extended to, the upper end shielded before described is connected to the drum in boiler crown wall, and lower end is connected to preceding screen
Lower collecting box；And the boiler also has and boiler Zuo Qiang, right wall is substantially vertical and extends to the specific shape of right wall from Zuo Qiang
Rear screen, it is described after shield upper end be connected to the drum in boiler crown wall, lower end is connected to the lower collecting box of wall after boiler；The slot
Type separator is connected to the drum and is arranged in the space as defined by the upper end and the rear upper end shielded of the preceding screen,
And the preceding screen and the rear upper end shielded all have respective first light pipe grid section；Screen, which has, before described is located at its first light pipe
Below grid sections and with the non-light pipe grid section of the first light pipe grid section continuous first, it is described after screen also have and be located at its first light pipe grid
Section lower section and with the non-light pipe grid section of the first light pipe grid section continuous first, the first non-light pipe grid section shielded before described and shields afterwards
First non-light pipe grid section defines the flue-dust retainer.
In a feasible embodiment, it is described before screen and it is described after screen also define it is below flue-dust retainer, and
The gray back room of flue-dust retainer connection.
In a feasible embodiment, gravity flap valve, the bottom of gray back room are provided at the top of the gray back room
It is limited by gray back guide plate shield after being extended to from the preceding screen, inclined, and the preceding screen is adjacent with the gray back guide plate
The position of top has the second light pipe grid section to provide gray back mouth, thus when the flue dust collected in the flue-dust retainer reaches gravity
When flap valve threshold value, flap valve overturning, flue dust falls to gray back guide plate and then enters via gray back mouth by the preceding screen and boiler
The burner hearth that front wall limits.
In a feasible embodiment, screen is also defined below the gray back room after shielding before described and is described
, economizer accommodation space for arranging economizer, the economizer accommodation space and the gray back room are by the gray back
Guide plate is spatially isolated from one another.
In a feasible embodiment, the bottom of the groove profile segregator is connected with multiple flue gas damping sheets, flue gas
Damping sheet with boiler Zuo Qiang, right wall is substantially vertical and extends to You Qiang, the first non-light pipe grid section on bottom edge and preceding screen from Zuo Qiang
Relatively and with it with predetermined gap, the gap provides flue gas damping, to force flue gas in the first light for passing through the preceding screen
The groove profile segregator is passed through after pipe grid section to advance towards the rear first light pipe grid section shielded, rather than is separated around groove profile
Device.
According to the fifth aspect of the present invention, a kind of boiler is provided, with horizontal flue, the horizontal flue face
Wall after boiler, and and then the downstream smoke inlet of horizontal flue is located so that the flue gas is impacted by the horizontal flue
It oliquely downward advances after wall far from rear wall afterwards, to be separated soot dust granule with flue gas using inertia force and centrifugal force.
In a feasible embodiment, the boiler have with boiler Zuo Qiang, right wall is substantially vertical and prolongs from Zuo Qiang
The rear screen of the specific shape of right wall is extended to, the upper end shielded after described is connected to the drum in boiler crown wall, and lower end is connected to boiler
The lower collecting box of wall afterwards；After described screen there is the first light pipe grid section positioned at upper end, be located at below the first light pipe grid section and with this
One the continuous first non-light pipe grid section of light pipe grid section and with the described first non-continuous second light pipe grid section of light pipe grid section；Institute
Horizontal flue is stated across the first light pipe grid section；The second light pipe grid section limits the smoke inlet, after the smoke inlet ratio
The first light pipe grid section of screen and the engaging portion of the described first non-light pipe grid section wall after boiler, so that described
Flue gas wall far from after after the wall after horizontal flue impact is oliquely downward advanced.
In a feasible embodiment, the space after shielding after described and is described between wall forms flue dust separation chamber,
The flue dust separation chamber is for collecting the soot dust granule separated with flue gas.
In a feasible embodiment, the third light pipe grid section having positioned at its lower end is shielded after described, it is described
Third light pipe grid section provides dust collecting opening.
In a feasible embodiment, the lid that the bottom connection one of the dust collecting opening can be opened and closed, Huo Zhelian
A comb shape dedusting smoking box, generally comb shape are connect, a row of combs dentation dust flue with top dust hopper and lower part, institute
It states dust hopper and limits dust storage chamber, the dust flue limits dust discharge access, and the dust storage chamber and the dust discharge access are communicating together, institute
It states comb teeth-shaped dust flue to be separated from each other to limit smoke outlet, the boiler, which has, to be set to below the comb shape dedusting smoking box
Sink, dust flue immerse sink in realize water seal, thus when in use, soot dust granule via dust collecting opening, comb shape dedusting arrange
Dust hopper, the dust flue of smoke box fall to sink.
In a feasible embodiment, the dedusting smoking box is the tank body as made of welded steel plate, and outside
Siding is equipped with inspection door to be opened/closed.
In a feasible embodiment, the comb shape dedusting smoking box is also used as boiler exterior wall.
In aforementioned all aspect and embodiment, front wall, Hou Qiang, Zuo Qiang, You Qiang, roof wall, preceding screen, rear screen are all membrane types
Wall construction, and the boiler is grate firing boiler.
To sum up, this high temperature denitration fly-ash reburning boiler having dust removed inside has original synthesis superior in denitration, energy conservation, emission reduction
Performance, and also there is some superiority in economical operation and feasibility.
Detailed description of the invention
Fig. 1 is the schematic isometric cross-sectional view of the boiler of one embodiment of the invention.
Fig. 2 is the side schematic sectional view of Fig. 1 embodiment.
Fig. 3 is the schematic cross sectional views of the embodiment of urea spout.
Fig. 4 is the partial cross-sectional view of comb shape dedusting smoking box.
Specific embodiment
Figures 1 and 2 show that the schematic sectional perspective view of boiler according to an embodiment of the invention and corresponding showing
Meaning property sectional view.The embodiment contains several aspects of the invention, but those skilled in the art are answered by following description
It is appreciated that these aspects can both be applied in combination, also can be used alone.The following detailed description of.
Referring first to Fig. 1 and Fig. 2, boiler according to this embodiment of the invention has front wall 100, rear wall 200, Zuo Qiang
300, right wall 400 and boiler roof wall 500.These walls define the inner space of boiler.In the inner space, it is provided with
Preceding screen 10 and rear screen 20.Before described screen 10 with boiler Zuo Qiang, right wall is substantially vertical and extends to You Qiang from Zuo Qiang, and with specific
Shape, it is described before screen 10 upper end be connected to the drum 50 in boiler crown wall, lower end is connected to lower collecting box 106.Similarly, institute
After stating screen 20 also with boiler Zuo Qiang, right wall is substantially vertical and also extends to You Qiang from Zuo Qiang, also there is specific shape, and on
The drum 50 being also connected in boiler crown wall is held, lower end is connected to the lower collecting box 23 of rear wall 200.
Preferably, above-mentioned front wall, Hou Qiang, Zuo Qiang, You Qiang, roof wall, preceding screen, rear screen are all membrane wall structures.This field
Technical staff will be appreciated that, membrane wall be usually to be welded with more fin tube side-by-sides of roll forming or be light pipe it
Between Welding flat steel (flat steel sheets) and formed wall-like structure.Membrane wall can have light pipe grid section, i.e., the section only have light pipe and
Not Welding flat steel (or the pipe of this section is without fin), to for example conveniently pass through flue gas.Therefore, membrane wall may include light pipe
Grid section and non-light pipe grid section.The preceding screen and rear screen in the present invention is including light pipe grid section and non-light pipe grid section, hereinafter
It is described in detail.
As for " header ", those skilled in the art can know, also referred to as " header ", refer in the boiler many effects one
It causes, the elongate cylindrical pressure vessel that pipe arranged in parallel connects together.Header mainly rises in systems to be collected, mixes, dividing again
Effect with working medium (usually water).The heating surfaces such as water cooled membrane wall, economizer, superheater, the reheater of boiler will be used
A large amount of header.The much numbers of header are made of seamless steel pipe larger-diameter, as heating surface material.Existed according to header
The location of restrain in length, header can be divided into upper header (be located at tube bank upper end), middle header (it is intermediate to be located at tube bank), under
Header (is located at tube bank lower end, such as the lower collecting box 23 of rear wall 200).Above-mentioned " drum 50 " is actually also a kind of header.
Fig. 1 and Fig. 2 shows embodiment in, the front wall 100 and preceding screen 10 (are being illustrated along the direction that flue gas is advanced
In embodiment from bottom to top) sequentially define combustion chamber 101, combustion chamber throat 2, long cavum laryngis 4 and burner hearth 8.
The upper end of preceding screen 10 and rear screen 20 has light pipe grid section, and light pipe grid section defines horizontal flue 14, from burner hearth 8
Flue gas can downstream advance through horizontal flue 14.Flue dust separation chamber 21 can also be formed between screen 20 and rear wall 200 afterwards.
According to a preferred embodiment, the top of 20 the two of the preceding screen 10 and rear screen can limit funnelform collection ash
Bucket 15, the lower part of the two can limit the economizer accommodation space 61 for accommodating economizer 60, and the middle part of the two can limit
Gray back room 11.The bottom of gray back room 11 is limited by inclined gray back guide plate 9, and gray back guide plate 9 accommodates flue-dust retainer 15 and economizer
The isolation of both spaces 61 is opened.
What needs to be explained here is that the orientation such as " up, down, left, right, before and after " herein description is for easy reason
The purpose of solution and orientation combining Figure 1 and Figure 2 is not construed as limiting the invention come what is described.
Next several aspects of the invention are described one by one.
One, denitration
The first aspect of the invention is related to denitration.Main technical concept includes: firstly, by 5 maximum limit of urea spout
Degree moves forward to the inlet of burner hearth 8, thus extends the reaction time of denitration reaction and to be more fully mixed；Secondly, passing through
Long cavum laryngis 4 between combustion chamber 101 and burner hearth 8 is set and controls the flue-gas temperature of urea nozzle in best reduction reaction
800-950 DEG C of range of temperature；Third provides the contoured of burner hearth by the shape of screen 10 before designing, so that further extending
Flue gas travel path increases the reaction time, and flue gas and urea is more fully mixed；Finally, passing through groove profile segregator
12 pairs of remaining urea and NOx is mandatory remixes, realize further denitration, the concentration of escape are greatly lowered.Below to upper
Several aspects are stated to be described in detail.
As depicted in figs. 1 and 2, boiler according to a first aspect of the present invention includes: combustion chamber 101, burner hearth 8 and connection
The long cavum laryngis 4 of the combustion chamber and the burner hearth, the long cavum laryngis become relative to the combustion chamber 101 and 8 section of the burner hearth
It is narrow.The height of long cavum laryngis 4, generally can be between 1 meter to 4 meters depending on fuel and ignition temperature.
In the illustrated embodiment, the combustion chamber 101, the burner hearth 8 and the long cavum laryngis 4 by the boiler front wall
100, left wall 300, right wall 400 and preceding screen 10 limit, but it can also be by other structure qualifications, this is without departing from the present invention
Range.
The face arch 1 and rear arch 3 that limit combustion chamber 101 are separately positioned on the lower part of the front wall 100 and preceding screen 10.Fuel exists
Burning generates flue gas in combustion chamber 101, and flue gas is upwardly into long cavum laryngis 4 through combustion chamber throat 2 from combustion chamber 101, subsequently into
Burner hearth 8.Flue gas when through long cavum laryngis 4 with front wall and preceding screen in working medium hydrothermal exchange, thus the top of long cavum laryngis i.e. with
Burner hearth intersection temperature is down to optimal no catalytic denitration reduction reaction temperature, and about 800-950 DEG C.The setting of urea spout 5 exists
The intersection with long cavum laryngis 4 of burner hearth 8, thus the flue gas with optimum temperature and the urea gas-liquid mixed sprayed by urea spout
Object hybrid concurrency gives birth to reduction reaction.Since flue gas has optimal reaction temperature, reduces the production quantity of NOx, improve
Denitration effect.
Unlike the present invention for being provided with long cavum laryngis, in the prior art, boiler is at most provided only with aditus laryngis 2 and does not have
There is long cavum laryngis 4.Compared with long cavum laryngis 4, the height of aditus laryngis 2 almost can be ignored (the usually only amount of ten or twenty centimetre
Grade).In the prior art, urea spout or the top that burner hearth 8 is arranged in or setting are at aditus laryngis 2.It is arranged in roof of the furnace
Problems faced is that smoke reaction temperature is too low, and mixes shorter with the reaction time；Problems faced, which is arranged at aditus laryngis, is
Flue-gas temperature is excessively high, so that reduction reaction can not almost be effectively performed.And in the present invention, pass through and long cavum laryngis 4 is set and is incited somebody to action
Urea notch setting burner hearth the intersection with long cavum laryngis, flue gas with long cavum laryngis 4 carry out heat exchange after temperature drop to
Optimal reaction temperature, and can be mixed and be reacted since the entrance of burner hearth, to be more fully mixed and react
Time is longer, so as to maximumlly reduce the generation of NOx.
In Fig. 1 and embodiment illustrated in fig. 2, the section of the long cavum laryngis is rectangle.However, in other feasible realities
It applies in example, the section of the long cavum laryngis may be other shapes, for example, the meander-shapeds such as zigzag, so as to not increase
The passage path for increasing flue gas in the case where lengthening cavum laryngis height, extends heat-exchange time.The cross sectional shape of long cavum laryngis can pass through
The shape of the setting of front wall and preceding screen is realized.
In addition to the control to reaction temperature, it is also contemplated that being designed to the shape of preceding screen, to extend flue gas traveling
Path increases the reaction time, further improves denitration effect with this.For this purpose, shielding this portion of 10 restriction burner hearth 8 before described
Divide and form inner fovea part of the concave surface towards boiler front wall 100, thus extends the travel path of flue gas, as depicted in figs. 1 and 2.Indent
The lower end in portion is flushed with urea spout substantially.In this way, what the flue gas for being upwardly into burner hearth 8 through long cavum laryngis 4 was sprayed by urea spout 5
Urea gas-liquid mixture presses to 8 right side of burner hearth, that is, the inner fovea part of screen 10 before being pressed towards, then along the concave shape row of preceding screen
Into finally at the top of arrival burner hearth 8, in this way, extending the reaction time of flue gas Yu urea gas-liquid mixture.
In Fig. 1 and non-limiting embodiment illustrated in fig. 2, the cross section of the inner fovea part is fold-line-shaped, particularly
It is three-stage fold-line-shaped, including vertical section A, the first tilting section B and the second tilting section C, the lower end of the first tilting section B and vertical section
The upper end of A is continuous, and the upper end of the second tilting section C and the lower end of vertical section A are continuous.It will be appreciated that the inner fovea part can also
To be other fold-line-shapeds, or other concave shape such as arcs, as long as flue gas travel path can be extended.
In order to further improve denitration effect, it is also contemplated that groove profile segregator is arranged in the horizontal flue 14 of flue gas
12.When passing through groove profile segregator 12, flue gas mixes again with urea, to have neither part nor lot in the remaining urea and nitrogen oxygen of reduction reaction
Compound NOx row sufficiently reduction again, further improves denitration effect.
Two, urea spout
The second aspect of the invention is related to the setting of urea spout.According to an aspect of the present invention, referring to Fig. 1 to figure
3, urea spout 5 is arranged in the header 102 of front wall 100, thus it is cooling by working-medium water in header, and then avoid the height of burner hearth
Temperature scaling loss caused by the urea spout, it is ensured that the safe handling of the urea spout.
In a preferred embodiment, urea spout 5 is made of metal material identical with front wall header 102, with example
Such as convenient for the welded connecting of the two.Urea spout 5 can slightly raise up or horizontally across front wall header 102 tube wall and with it is described
The weldering connection sealing of header 102.The angle that raises up is usually no more than 30 °.The advantages of urea spout slightly raises up is: flue gas is from relatively narrow
Long cavum laryngis speed slows down, density becomes smaller when entering the expansion space of wider burner hearth, slightly raise up can be with for urea spout at this time
Mix more urea in the region that velocity of flue gas slows down, density becomes smaller with flue gas, to be more fully mixed.Urea spout
5 rear end can be socketed the hose 53 for conveying liquid gaseous state urea, and the front end 52 of urea spout 5 can prolong beyond header 102
It extends in burner hearth 8, the length exceeded is in 10-20 millimeters of ranges.
Three, fly-ash reburning
The third aspect of the invention is related to fly-ash reburning.That is, by soot particulates (mainly uncompleted burned carbon) weight of collection
New burner hearth of being sent into burns again, to improve efficiency of combustion, reduce energy consumption.For this purpose, the present invention be provided with groove profile segregator and
It is provided with flue-dust retainer below, is connected with the hearth to the flue-dust retainer property of can choose, so that the cigarette ash in flue-dust retainer can be by again
It sends burner hearth back to, realizes re-ignition.As the scheme further improved, the present invention is also designed rear screen, to have using it
The light pipe grid section of horizontal extension component further collects the soot particulates from the flue gas that groove profile segregator comes out.It is explained in detail below.
Firstly, referring to Fig. 1 and Fig. 2, the preceding screen and the upper end shielded afterwards are connected to the drum 50 in boiler crown wall.By
In space defined by the upper end and the rear upper end shielded shielded before described, it is disposed with groove profile segregator 12, groove profile segregator
It is connected to the drum 50.The upper end of screen 10 has the first light pipe grid section D before described, and 20 upper end is shielded after described has the first light
Pipe grid section E to allow flue gas into groove profile segregator 12 between the two, and leaves from groove profile segregator 12.
Screen 10 has below its first light pipe grid section D and non-with the first light pipe grid section D continuous first before described
Light pipe grid section B, it is described after screen 20 also have be located at below its first light pipe grid section E and with the first light pipe grid section E continuous the
One non-light pipe grid section F, the preceding first non-light pipe grid section B shielded and the first non-light pipe grid section F shielded afterwards define flue-dust retainer 15.
Screen 10 and the rear screen 20 also define gray back room positioned at 15 lower section of flue-dust retainer, with flue-dust retainer connection before described
11.In the illustrated embodiment, the gray back room is limited by the vertical section of front and back screen, but can also be by other shapes and direction
Section limit.
As depicted in figs. 1 and 2, it is provided with gravity flap valve 16 at the top of the gray back room, the bottom of gray back room is by from institute
After screen 10 extends to before stating screen 20, inclined gray back guide plate 9 limit, and it is described before screen 10 with the gray back guide plate 9 close to
The position of top have the second light pipe grid section A1 to providing gray back mouth 17, thus when the flue dust collected in the flue-dust retainer 15
When reaching the threshold value of gravity flap valve 16, flap valve 16 overturn, flue dust fall to gray back guide plate 9 so that via gray back mouth 17 again
It is rekindled into burner hearth 8 and in the high-temperature flue gas stream of rising, realizes re-ignition.
In order to ensure flue gas pass through it is described before shield the first light pipe grid section D after pass through the groove profile segregator 12 without
It is to bypass groove profile segregator 12, the bottom of the groove profile segregator 12 is connected with (such as welding) multiple flue gas damping sheets 13, cigarette
Gas damping sheet 13 with boiler Zuo Qiang, right wall is substantially vertical and extends to You Qiang, the first non-light on bottom edge and preceding screen 10 from Zuo Qiang
For pipe grid section B relatively and with it with predetermined gap d, the gap provides flue gas damping.The preferably vertical arrangement of flue gas damping sheet 13.
By the way that flue gas damping sheet is arranged, actually flue gas is prevented to bypass, so that flue gas can only pass through groove profile segregator, because flue gas is logical
Resistance (particularly in view of having the cigarette ash fallen from groove profile segregator in the gap location) when crossing aforementioned gap d is obviously big
In the resistance of the entrance side from groove profile segregator to outlet side.In other words, by be arranged flue gas damping sheet, flue gas will substantially from
Pass through inside groove profile segregator, advances from entrance side to outlet side, and downstream.Flue gas pass through groove profile segregator when, wherein
Contained soot dust granule separates and with the shock of the extended surface tube of groove profile segregator and falls to flue-dust retainer 15.Groove profile segregator is this
Known to the technical staff of field, structure is repeated no more.
An improved plan according to the present invention, flue-dust retainer 15 also further collect the flue gas across groove profile segregator 12
In soot particulates, this makes it have horizontal extension component by the shape of upper end shielded after design to realize.
With shown in Fig. 1 and non-limiting embodiment shown in Fig. 2, the first light pipe grid section E shielded after described includes substantially perpendicular
Straight section E1 and approximate horizontal section of E2.Approximate horizontal section of E2 provides the horizontal extension component of the first light pipe grid section E.In boiler operatiopn
When, flue gas carries out the soot dust granule separation of first time when passing through groove profile segregator 12, then pass through roughly vertical section of E1, and
Approximate horizontal section of E2 upper horizontal is advanced towards rear wall.Flue dust during advancing along approximate horizontal section of E2, in flue gas
Particle can be fallen in flue-dust retainer 15 through horizontal segment E2 under the effect of gravity, to carry out second of soot dust granule separation.
Therefore, in the improved plan, on the one hand flue-dust retainer 15 collects the soot dust granule from groove profile segregator (it comes
Gap d between flue gas damping sheet and preceding screen), on the other hand collect the flue dust from the flue gas that groove profile segregator comes out
Grain.
In the illustrated embodiment, the first light pipe grid section D of the preceding screen 10 is the straight portions of roughly vertical arrangement, still
, it is to be appreciated that light pipe grid section D also can have other shapes, such as arc or polygon.As described above, this field
Technical staff will be understood that can also by the first light pipe grid section E of roughly vertical section of E1 and approximate horizontal section of the E2 rear screen 20 constituted
To be replaced by the light pipe grid section of other forms, such as generally arcuate light pipe grid section or the linear type light pipe grid section of inclination arrangement,
As long as it is with horizontal extension component.
To sum up, although screen 10 and rear screen 20 are by multistage vertical section and multistage tilting section structure before showing in diagram
At " multi-segment structure ", but the present invention is not limited thereto.For example, adjacent two sections or more multistage can be by seamlessly transitting
Segmental arc replaces, as long as forward and backward screen can limit flue-dust retainer and gray back room.
Four, dedusting in stove
The fourth aspect of the invention is related to dedusting in stove, specifically includes that offer horizontal flue, and makes horizontal flue just
To wall after boiler, so that flue gas flings wall after boiler, and the shape by shielding after design, guides the cigarette in horizontal flue
Gas is turned back with acute angle, so that the soot dust granule in flue gas wall and will be fallen due to inertia force and after hitting along rear wall, and
It is further removed under the action of the centrifugal force in acute angle steering procedure.
In the illustrated embodiment, horizontal flue is by the first light pipe grid section D on preceding screen top and first light on rear screen top
Pipe grid section E is limited.Projection on the two light pipe grid Duan Cong front walls to the horizontal direction of rear wall is substantially aligned with, to limit water
Flat flue, and wall after horizontal flue face boiler.
Screen 20 defines the smoke inlet 18 in horizontal flue downstream after described.Flue gas is will be under after horizontal flue
The smoke inlet 18 of trip is advanced.In order to enable flue gas is turned back with acute angle, the smoke inlet 18 is than rear first light pipe shielded
Wall 200 after boiler the engaging portion EF of grid section E and the described first non-light pipe grid section F, so that flue gas is passing through institute
Wall 200 is oliquely downward advanced later after stating horizontal flue, and the soot dust granule in flue gas will be hit due to inertia force in the process
It hits rear wall and is fallen along rear wall, and will also further be removed under the action of the centrifugal force in acute angle steering procedure.
In exemplary embodiment illustrated, the restriction economizer accommodation space 61 of rear screen 20 is arranged in the smoke inlet 18
Part on, such as provided by the second horizontal light pipe grid section H.
In a further preferred embodiment, after described screen 20 after the close boiler of the smoke inlet 18 wall 200 one
Side is provided with dust board 19.The dust board 19 and boiler Zuo Qiang, right wall is substantially vertical and extends to You Qiang from Zuo Qiang, and preferably
Ground is arranged vertically.
Space after described between screen 20 and the rear wall 200 forms flue dust separation chamber 21, the flue dust separation chamber 21
For collecting the soot dust granule separated above by inertia force and centrifugal force with flue gas.
The lower end of screen 20 is connected to the header 23 of rear wall 200 afterwards.Screen 20 has the third positioned at its lower end after described
Light pipe grid section J, the third light pipe grid section J provide dust collecting opening 22.For the ease of collecting soot dust granule, the lower part of rear screen 20 can be with
Inclination or arc extend, in order to which soot dust granule slides along it and gathers dust collecting opening 22.
The bottom of dust collecting opening 22 can connect a lid to be opened/closed, with timing deashing；Or it can connect one according to this hair
Bright comb shape dedusting smoking box 24.Comb shape dedusting smoking box generally comb shape, one with top dust hopper 242 and lower part
Comb teeth-shaped dust flue 244 is arranged, the dust hopper limits dust storage chamber, and the dust flue limits dust discharge access, the dust storage chamber and institute
It is communicating together to state dust discharge access, the comb teeth-shaped dust flue 244 is separated from each other to limit smoke outlet 246, and the boiler has
The sink 28 being set to below the comb shape dedusting smoking box, dust flue 244 immerse in sink 28 to realize water seal, thus when making
Used time, soot dust granule fall to sink 28 via dust collecting opening 22, the dust hopper 242 of comb shape dedusting smoking box, dust flue 244.
In a feasible embodiment, dedusting smoking box 24 is the tank body as made of welded steel plate, with dust collecting opening 22
Pass through flanged joint.Preferably, the outside siding of dedusting smoking box 24 is equipped with inspection door 245 to be opened/closed.
The comb shape dedusting smoking box 24 can be also used as boiler exterior wall, the i.e. extension as rear wall 200.
The economizer accommodation space 61 is spatially isolated from one another by gray back guide plate 9 with the gray back room 11.Scheming
In the embodiment shown, the economizer accommodation space 61 is by the lower part of preceding screen 10, the lower part of rear screen 20, comb shape dedusting smoking box 24
Common to limit, economizer 60 will be arranged in the economizer accommodation space 61.Upstream flue gas enters via smoke inlet 18 saves coal
Then device accommodation space 61 passes through economizer 60, finally from the smoke outlet between the dust flue 244 of comb shape dedusting smoking box 24
246 discharges.
In this way, according to the present invention, entering province by the soot dust granule for the water-wet that urea liquid and reduction reaction generate
Since inertia force and centrifugal force are separated and are discharged before coal device, greatly subtract hence into the flue dust in the flue gas of economizer
It is few, to reduce economizer surface bonded deposit, heat exchange efficiency is improved, boiler original is on the other hand also considerably reduced
Beginning dust exhausting concentration.
Seven, other aspects
Those skilled in the art will be understood that this specification aforementioned aspects can be used alone, can also be any group
It closes and uses.In addition, those skilled in the art will be understood that the flue gas in entire boiler traveling can by air blower and/or
Exhaust fan is realized.
Claims (27)
1. a kind of boiler, there is combustion chamber, burner hearth, which is characterized in that the boiler further includes connecting the combustion chamber and described
The long cavum laryngis of burner hearth, the long cavum laryngis narrow relative to the combustion chamber and the section of burner hearth and with 1 meter to 4 meters of height
Degree, and the boiler also has the urea spout positioned close to long cavum laryngis and burner hearth intersection.
2. boiler as described in claim 1, wherein the section of the long cavum laryngis is rectangle.
3. boiler as described in claim 1, wherein the section of the long cavum laryngis is in a zigzag.
4. boiler as described in claim 1, wherein the urea notch setting is in the header of boiler front wall, to utilize
Working-medium water realizes cooling in header.
5. boiler as described in claim 1, wherein the urea spout runs through the tube wall of the header of front wall with slightly raising up,
And its front end extends in burner hearth.
6. boiler as described in claim 1, wherein the urea spout substantially horizontally runs through the tube wall of the header of front wall,
And its front end extends in burner hearth.
7. boiler as described in claim 1, wherein the boiler has with boiler Zuo Qiang, right wall is substantially vertical and from Zuo Qiang
The preceding screen of the specific shape of right wall is extended to, the upper end shielded before described is connected to the drum in boiler crown wall, before lower end is connected to
Shield lower collecting box；The combustion chamber, the burner hearth and the long cavum laryngis by the front wall of the boiler, Zuo Qiang, right wall and it is described before
Screen limits.
8. boiler as claimed in claim 7, wherein this part of the restriction burner hearth shielded before described forms concave surface towards boiler
Thus the inner fovea part of front wall extends the travel path of flue gas.
9. boiler as claimed in claim 8, wherein the cross section of the inner fovea part is arc or fold-line-shaped.
10. boiler as claimed in claim 9, wherein the inner fovea part includes vertical section, the first tilting section and the second inclination
Section, the lower end of the first tilting section and the upper end of vertical section are continuous, and the upper end of the second tilting section and the lower end of vertical section are continuous.
11. boiler as claimed in claim 8, wherein the boiler has the horizontal flue being connected with the hearth, so that cigarette
Gas horizontal after travelling upwardly along the inner fovea part of the preceding screen can advance, to form the flue gas travel path of S-shaped, thus
Further extend the travel path of flue gas.
12. boiler as claimed in claim 11, wherein the boiler also has with boiler Zuo Qiang, right wall is substantially vertical and from
Left wall extends to the rear screen of the specific shape of right wall, and the upper end shielded after described is connected to the drum in boiler crown wall, lower end connection
The lower collecting box of wall after to boiler.
13. boiler as claimed in claim 12, wherein the boiler has groove profile segregator, and groove profile segregator is connected to institute
It states drum and is arranged in the space as defined by the upper end and the rear upper end shielded of the preceding screen, after shielding before described and is described
The upper end of screen all has respective first light pipe grid section.
14. boiler as claimed in claim 13, wherein before described screen have be located at below its first light pipe grid section and with this
One the continuous first non-light pipe grid section of light pipe grid section, it is described after screen also have be located at below its first light pipe grid section and with this first
The non-light pipe grid section of light pipe grid section continuous first, the preceding first non-light pipe grid section shielded and the first non-light pipe grid section limit shielded afterwards
Flue-dust retainer is determined.
15. boiler as claimed in claim 14, wherein screen and the rear screen also define below flue-dust retainer before described
, with the gray back room of flue-dust retainer connection.
16. boiler as claimed in claim 15, wherein gravity flap valve is provided at the top of the gray back room, gray back room
Bottom is limited by gray back guide plate shield after extending to from the preceding screen, inclined, and the preceding screen is tight with the gray back guide plate
The position of adjacent top has the second light pipe grid section to provide gray back mouth, thus when the flue dust collected in the flue-dust retainer reaches
When gravity flap valve threshold value, flap valve overturning, flue dust fall to gray back guide plate so that via gray back mouth enter by the preceding screen with
The burner hearth that boiler front wall limits.
17. boiler as claimed in claim 16, wherein screen and the rear screen also define under the gray back room before described
Economizer accommodation space square, for arranging economizer, the economizer accommodation space are returned with the gray back room by described
Grey guide plate is spatially isolated from one another, shields after described and is formed with smoke inlet on the part for limiting the economizer accommodation space.
18. boiler as claimed in claim 14, wherein the bottom of the groove profile segregator is connected with multiple flue gas damping sheets,
Flue gas damping sheet with boiler Zuo Qiang, right wall is substantially vertical and extends to You Qiang, the first non-light pipe on bottom edge and preceding screen from Zuo Qiang
Grid section it is opposite and with it with predetermined gap, the gap provides flue gas damping, with force flue gas pass through it is described before shield the
The groove profile segregator is passed through after one light pipe grid section to advance towards the rear first light pipe grid section shielded, rather than bypasses groove profile
Separator.
19. boiler as claimed in claim 18, wherein screen has and the described first non-light pipe grid section continuous second after described
Light pipe grid section, the second light pipe grid section limit the smoke inlet, and the smoke inlet is than rear the first light pipe grid shielded
Section wall after boiler with the engaging portion of the described first non-light pipe grid section, so that flue gas is in the process horizontal flue
The smoke inlet is oliquely downward traveled into after impact after wall.
20. boiler as claimed in claim 19, wherein screen side of wall after the close boiler of the smoke inlet is set after described
It is equipped with dust board.
21. boiler as claimed in claim 20, wherein the dust board and boiler Zuo Qiang, right wall are substantially vertical and from Zuo Qiang
Extend to You Qiang.
22. boiler as claimed in claim 21, wherein the space after described between screen and the rear wall forms flue dust separation
Room, the flue dust separation chamber is for collecting the soot dust granule separated with flue gas.
23. boiler as claimed in claim 22, wherein screen has another light pipe grid section positioned at its lower end after described,
Another light pipe grid section provides the dust collecting opening of the flue dust separation chamber.
24. boiler as claimed in claim 23, wherein the lid that the bottom connection one of the dust collecting opening can be opened and closed, or
Person connects a comb shape dedusting smoking box, generally comb shape, a row of combs dentation dust discharge with top dust hopper and lower part
Pipe, the dust hopper limit dust storage chamber, and the dust flue limits dust discharge access, and the dust storage chamber and the dust discharge access join each other
Logical, the comb teeth-shaped dust flue is separated from each other to limit smoke outlet, and the boiler, which has, is set to the comb shape dedusting smoke evacuation
Sink below case, dust flue immerse in sink to realize water seal, to work as in use, soot dust granule is via dust collecting opening, comb shape
Dust hopper, the dust flue of dedusting smoking box fall to sink.
25. boiler as claimed in claim 24, wherein the dedusting smoking box is the tank body as made of welded steel plate, and
Outside siding is equipped with inspection door to be opened/closed.
26. boiler as claimed in claim 24, wherein the comb shape dedusting smoking box is also used as boiler exterior wall.
27. boiler as described in any one of the preceding claims, wherein front wall, Hou Qiang, Zuo Qiang, You Qiang, the roof of boiler
Wall, preceding screen, rear screen is all membrane wall structure and/or the boiler is grate firing boiler.
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| CN201711500087.9A CN109990266A (en) | 2017-12-29 | 2017-12-29 | A kind of high temperature denitration, fly-ash reburning, boiler having dust removed inside |
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| CN201711500087.9A CN109990266A (en) | 2017-12-29 | 2017-12-29 | A kind of high temperature denitration, fly-ash reburning, boiler having dust removed inside |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2505704Y (en) * | 2001-10-21 | 2002-08-14 | 广西绿洲热能设备有限公司 | Boiler for burning concentrated alcohol waste liquid |
| CN101949531A (en) * | 2010-09-14 | 2011-01-19 | 天津宝成机械集团有限公司 | Novel layer burning boiler |
| CN102679390A (en) * | 2012-04-28 | 2012-09-19 | 西安交通大学 | Compound furnace arch and compound secondary air structure for cooperatively controlling generation of nitrogen oxide (NOX) |
| CN104190252A (en) * | 2014-08-20 | 2014-12-10 | 浙江大学 | Multistage pyrolysis coupled flue gas denitrification system with independent SCR (Selective Catalytic Reduction) ammonia-supplementing spray guns |
| CN105020700A (en) * | 2015-07-10 | 2015-11-04 | 哈尔滨工业大学 | Layer combustion boiler combination denitration device and method |
| CN205919352U (en) * | 2016-06-24 | 2017-02-01 | 上海交通大学 | Living beings gratefiring boiler is hunch wind combination of flue in a zigzag |
| CN206064132U (en) * | 2016-09-18 | 2017-04-05 | 中能锐赫科技（北京）股份有限公司 | A kind of denitration spray gun arrangement system for CFBB |
| CN208595537U (en) * | 2017-12-29 | 2019-03-12 | 马成果 | A kind of boiler |
-
2017
- 2017-12-29 CN CN201711500087.9A patent/CN109990266A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2505704Y (en) * | 2001-10-21 | 2002-08-14 | 广西绿洲热能设备有限公司 | Boiler for burning concentrated alcohol waste liquid |
| CN101949531A (en) * | 2010-09-14 | 2011-01-19 | 天津宝成机械集团有限公司 | Novel layer burning boiler |
| CN102679390A (en) * | 2012-04-28 | 2012-09-19 | 西安交通大学 | Compound furnace arch and compound secondary air structure for cooperatively controlling generation of nitrogen oxide (NOX) |
| CN104190252A (en) * | 2014-08-20 | 2014-12-10 | 浙江大学 | Multistage pyrolysis coupled flue gas denitrification system with independent SCR (Selective Catalytic Reduction) ammonia-supplementing spray guns |
| CN105020700A (en) * | 2015-07-10 | 2015-11-04 | 哈尔滨工业大学 | Layer combustion boiler combination denitration device and method |
| CN205919352U (en) * | 2016-06-24 | 2017-02-01 | 上海交通大学 | Living beings gratefiring boiler is hunch wind combination of flue in a zigzag |
| CN206064132U (en) * | 2016-09-18 | 2017-04-05 | 中能锐赫科技（北京）股份有限公司 | A kind of denitration spray gun arrangement system for CFBB |
| CN208595537U (en) * | 2017-12-29 | 2019-03-12 | 马成果 | A kind of boiler |
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