CN109578978A - A kind of environmentally friendly coal-burning boiler and its processing method of fractional combustion - Google Patents
A kind of environmentally friendly coal-burning boiler and its processing method of fractional combustion Download PDFInfo
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- CN109578978A CN109578978A CN201811405615.7A CN201811405615A CN109578978A CN 109578978 A CN109578978 A CN 109578978A CN 201811405615 A CN201811405615 A CN 201811405615A CN 109578978 A CN109578978 A CN 109578978A
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- longitudinal direction
- coal
- fire tube
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- 238000002485 combustion reaction Methods 0.000 title claims abstract description 100
- 238000003672 processing method Methods 0.000 title claims abstract description 13
- 238000005192 partition Methods 0.000 claims abstract description 168
- 239000003245 coal Substances 0.000 claims abstract description 45
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 33
- 239000001301 oxygen Substances 0.000 claims abstract description 33
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 33
- 238000000197 pyrolysis Methods 0.000 claims abstract description 28
- 238000002309 gasification Methods 0.000 claims description 38
- 239000003546 flue gas Substances 0.000 claims description 37
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 36
- 239000007789 gas Substances 0.000 claims description 28
- 239000000446 fuel Substances 0.000 claims description 18
- 239000000463 material Substances 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 13
- 230000004087 circulation Effects 0.000 claims description 11
- 230000000694 effects Effects 0.000 claims description 7
- 230000009471 action Effects 0.000 claims description 6
- 210000000038 chest Anatomy 0.000 claims description 3
- 210000000952 spleen Anatomy 0.000 claims 2
- 238000003763 carbonization Methods 0.000 abstract description 19
- 239000003344 environmental pollutant Substances 0.000 abstract description 4
- 231100000719 pollutant Toxicity 0.000 abstract description 4
- 230000000052 comparative effect Effects 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 238000010438 heat treatment Methods 0.000 description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000008030 elimination Effects 0.000 description 2
- 238000003379 elimination reaction Methods 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000009841 combustion method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000002737 fuel gas Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23B—METHODS OR APPARATUS FOR COMBUSTION USING ONLY SOLID FUEL
- F23B10/00—Combustion apparatus characterised by the combination of two or more combustion chambers
-
- 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
- F23B—METHODS OR APPARATUS FOR COMBUSTION USING ONLY SOLID FUEL
- F23B90/00—Combustion methods not related to a particular type of apparatus
- F23B90/04—Combustion methods not related to a particular type of apparatus including secondary combustion
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23B—METHODS OR APPARATUS FOR COMBUSTION USING ONLY SOLID FUEL
- F23B90/00—Combustion methods not related to a particular type of apparatus
- F23B90/04—Combustion methods not related to a particular type of apparatus including secondary combustion
- F23B90/06—Combustion methods not related to a particular type of apparatus including secondary combustion the primary combustion being a gasification or pyrolysis in a reductive atmosphere
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L1/00—Passages or apertures for delivering primary air for combustion
- F23L1/02—Passages or apertures for delivering primary air for combustion by discharging the air below the fire
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L9/00—Passages or apertures for delivering secondary air for completing combustion of fuel
- F23L9/02—Passages or apertures for delivering secondary air for completing combustion of fuel by discharging the air above the fire
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
- F28D21/0001—Recuperative heat exchangers
- F28D21/0003—Recuperative heat exchangers the heat being recuperated from exhaust gases
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Solid-Fuel Combustion (AREA)
Abstract
The present invention provides the environmentally friendly coal-burning boiler and its processing method of a kind of fractional combustion, coal filling hole is equipped at the top of boiler furnace, burner hearth bottom is equipped with first longitudinal direction partition will be divided into two top connections first chamber and second chamber in burner hearth；First chamber internal upper part is equipped with fire tube in first longitudinal direction bulkhead sides, first longitudinal direction partition and furnace roof are fixed on by apertured partition at the top of fire tube, fire tube bottom through hole partition is fixed on first longitudinal direction partition and partition loose one end in hole is to having second longitudinal direction partition, first chamber lower part is divided into the third chamber and the 4th chamber of the connection of two bottoms, burnout degree entrance is set in 4th chamber, third chamber bottom sets fire grate, is equipped with air port below fire grate；First tilt clapboard is set in the space in first chamber far from first longitudinal direction partition.The present invention eliminates the presence of carbonization region oxygen by heat exchange pattern, to realize truly carbonization, reduces influence of the oxygen to pyrolysis, pollutant discharge amount is effectively reduced.
Description
Technical field
The invention belongs to coal burning apparatus field, it is related to environmentally friendly coal-burning boiler and its processing side of a kind of fractional combustion
Method more particularly to a kind of environmentally friendly coal-burning boiler and its processing method that fractional combustion is improved by heat transfer.
Background technique
Currently, especially carbonization and coal-char combustion area divide up and down in the coal-burning boiler using grading combustion technology
The coal-burning boiler of cloth, carbonization and coal-char combustion area are connected arrangement usually to without apparent boundary.
If CN 107238111A discloses a kind of coal heating stove, coal filling hole, body top is arranged in body top side
Chimney is set with coal filling hole opposite side；Coal-burning stove for heating furnace main body internal upper part is vertically arranged water jacket partition, by coal heating stove master
The flue gas after-flame heat transfer zone that internal top is divided into the pyrolytic gasification area being connected with coal filling hole and is connected with chimney；Coal heating stove
Lower part does not set the region of partition as coal-char combustion area in main body；Fire grate, the fire grate is arranged in coal-char combustion area lower tilt
Lower section is equipped with primary air nozzle；The burning-out zone on coal-char combustion area top is equipped with overfiren air port；Setting is adopted in the burning-out zone
Warm water heat exchanger tube.
For fractional combustion coal-burning boiler in the prior art, the air hose generally laid in carbonization region, or half
The air of burnt combustion zone can scurry into pyrolysis zone, not be able to achieve carbonization truly, be somewhat similarly to oxygen deprivation combustion instead
It burns, be easy to cause smoke elimination insufficient (over-emitting black exhaust), CO and NOxConcentration of emission increases rapidly.Meanwhile also adding the wind of furnace puff
Danger.
Summary of the invention
It is connected arrangement with coal-char combustion area for carbonization present in existing fractional combustion boiler to without apparent
Boundary, is not able to achieve carbonization truly, be easy to cause smoke elimination insufficient (over-emitting black exhaust), CO and NOxConcentration of emission is fast
The problems such as speed increases, and furnace puff risk is high, the present invention provides a kind of environmentally friendly coal-burning boiler of fractional combustion and its processing sides
Method.The present invention eliminates the presence of carbonization region oxygen by heat exchange pattern, thus realize truly carbonization,
Influence of the oxygen to pyrolysis is reduced, pollutant discharge amount is effectively reduced.
To achieve this purpose, the present invention adopts the following technical scheme:
In a first aspect, the coal-burning boiler includes furnace body and furnace the present invention provides a kind of coal-burning boiler of fractional combustion
Thorax, furnace body top are equipped with coal filling hole, are equipped with first longitudinal direction partition in burner hearth bottom in burner hearth and burner hearth interior zone is divided into two
The chamber of top connection, respectively first chamber and second chamber；
Wherein, in first chamber internal upper part, be equipped with fire tube in first longitudinal direction bulkhead sides, at the top of fire tube by first it is with holes every
Plate is fixed on first longitudinal direction partition and furnace roof, and fire tube bottom is fixed on first longitudinal direction partition by the second apertured partition, and second
Apertured partition is not secured to one end of first longitudinal direction partition to second longitudinal direction partition is had, and first chamber lower area is divided into
The chamber of two bottoms connection, i.e. third chamber and the 4th chamber, the 4th chamber are located at below fire tube, set combustion in the 4th chamber
Wind entrance to the greatest extent, third cavity bottom are equipped with fire grate, and the furnace body below fire grate is equipped with air port；
The first tilt clapboard is set in space in first chamber between fire tube and the furnace wall of separate first longitudinal direction partition,
First tilt clapboard is tilted to lower portion of furnace body, and there are the spaces passed through for material between fire tube；
Heat exchanger tube is equipped with inside second chamber, the furnace wall of second chamber bottom is equipped with flue gas discharge opening.
In the present invention, " first ", " second ", " third " and " the 4th ", etc., it is only for area is carried out in name
Point, there is no other particular meanings.
In the present invention, aperture and fire tube on first apertured partition and the second apertured partition coincide and are tightly connected,
So that gas can circulate from fire tube, and the shell sections in fire tube array are then used for fire coal and pass through；
In the present invention, when the top and bottom of the first tilt clapboard are provided with downward partition, can by with
Side wall connection is fixed.
In the present invention, the space on the first tilt clapboard top is coal store and pyrolytic gasification area, and coal store is located at pyrolysis gas
The upstream Hua Qu, institute, pyrolytic gasification area calorific requirement then have fire tube to directly feed by way of heat transfer, realize truly
Carbonization, the heat in fire tube burns from high-temperature flue gas and burnout degree.
First tilt clapboard lower section to the region between fire grate is then coal-char combustion area, and coal-char combustion area uses base burning
Mode, to flow into coal-char combustion area under suction function from top to bottom in burner hearth anti-with half-angle for the pyrolysis gas that is produced from pyrolytic gasification area
Harmless nitrogen should be converted into.
The 4th chamber below fire tube is secondary furnace, on the one hand improves the burn-off rate of fuel gas, on the other hand improves fire
The ignition temperature in region increases carbonization degree.
The heat exchanger tube being arranged inside second chamber can reduce exhaust gas temperature, increase boiler efficiency.
It is used as currently preferred technical solution below, but not as the limitation of technical solution provided by the invention, passes through
Following technical scheme can preferably reach and realize technical purpose and beneficial effect of the invention.
As currently preferred technical solution, charging gear is equipped at the coal filling hole, to control coal-fired supply amount.
Preferably, the coal filling hole is set at the top of first chamber；
Preferably, the coal filling hole is set to the upper portion side wall of second chamber.
As currently preferred technical solution, number >=2 of the fire tube, such as 2,3,4,5,6,
7,8,9,10,11,12,13 or 14 etc. and more, it is not limited to cited numerical value, the number
It is equally applicable to be worth other unlisted numerical value in range, preferably 12~16.
Preferably, second apertured partition to furnace bottom tilt, be conducive to the material carried on the second apertured partition to
Under can smoothly enter into half-angle combustion zone.
Preferably, second apertured partition is tilted to furnace bottom and with first longitudinal direction partition in 60 °~70 °, such as 60 °,
62 °, 64 °, 66 °, 68 ° or 70 ° etc., it is not limited to cited numerical value, other interior unlisted numerical value of the numberical range
It is equally applicable.
As currently preferred technical solution, first tilt clapboard, which tilts to lower portion of furnace body and between furnace wall, is in
20 °~30 °, such as 20 °, 22 °, 24 °, 26 °, 28 ° or 30 ° etc., it is not limited to cited numerical value, in the numberical range
Other unlisted numerical value are equally applicable.
Preferably, first tilt clapboard top is fixed on the furnace wall far from first longitudinal direction partition.
Preferably, first tilt clapboard lower end is equipped with third longitudinal baffle, stays between third longitudinal baffle and fire tube
There is the space for material circulation, third longitudinal baffle can guide the materials such as the semicoke generated in the pyrolytic process of mainstream to be downwardly into
Half-angle combustion zone.
Preferably, first tilt clapboard upper end is equipped with the 4th downward longitudinal baffle, the 4th longitudinal baffle and furnace wall
Between there are the space of supplied gas circulation, the pyrolysis gas generated during pyrolytic gasification can be made to be downwardly into partly by the space
Burnt combustion zone, a possibility that thereby reducing furnace puff.
As currently preferred technical solution, when coal filling hole is set to the upper portion side wall of second chamber, in the second chamber
Fire tube is arranged in room top, and first longitudinal direction partition and furnace roof are fixed on by third apertured partition in fire tube top, and fire tube bottom passes through
4th apertured partition is fixed on first longitudinal direction partition, and the heat exchanger tube in second chamber is located at the space below fire tube.
Preferably, the fire tube length being arranged in the second chamber is not more than the length for the fire tube being arranged in first chamber,
Otherwise, the material on the 4th apertured partition, which can not be successfully, moves downwardly into coal-char combustion area.
In the present invention, coal scuttle is set to second chamber side, i.e. coal store opposite, (can manage between each fire tube
The external space) pyrolytic gasification area is formed, expand the area in pyrolytic gasification area, increases pyrogenation and carbonization heat exchange area, increase fuel
Degree of pyrolysis.
Preferably, the 4th apertured partition is tilted to first longitudinal direction partition side, so as to the fire coal being added from coal filling hole
And the semicoke that pyrolytic gasification generates can move downward, and then burn into coal-char combustion area.
Preferably, the 4th apertured partition, which tilts to first longitudinal direction partition side and between first longitudinal direction partition, is in
10 °~20 °, such as 10 °, 12 °, 14 °, 16 °, 18 ° or 20 ° etc., it is not limited to cited numerical value, in the numberical range
Other unlisted numerical value are equally applicable.
As currently preferred technical solution, the coal-burning boiler includes furnace body and burner hearth, first chamber top in furnace body
Portion is equipped with coal filling hole, is equipped with first longitudinal direction partition in burner hearth bottom in burner hearth and burner hearth interior zone is divided into what two tops were connected to
Chamber, respectively first chamber and second chamber；
Wherein, in first chamber internal upper part, at least 2 column fire tubes are equipped in first longitudinal direction bulkhead sides, by the at the top of fire tube
One apertured partition is fixed on first longitudinal direction partition and furnace roof, and first longitudinal direction partition is fixed on by the second apertured partition in fire tube bottom
On, the second apertured partition tilts to furnace bottom and is in 60 °~70 ° with first longitudinal direction partition；Second apertured partition is not secured to first
First chamber lower area is divided into the chamber of two bottoms connection to second longitudinal direction partition is had by one end of longitudinal baffle,
That is third chamber and the 4th chamber, the 4th chamber are located at below fire tube, and burnout degree entrance, third chamber bottom are set in the 4th chamber
Portion is equipped with fire grate, and the furnace body below fire grate is equipped with air port；
The first tilt clapboard is set in space in first chamber between fire tube and the furnace wall of separate first longitudinal direction partition,
First tilt clapboard top is fixed on the furnace wall far from first longitudinal direction partition, the first tilt clapboard tilted to lower portion of furnace body and with
It is in 20 °~30 ° between furnace wall, the first tilt clapboard lower end is equipped with third longitudinal baffle, stays between third longitudinal baffle and fire tube
There is the space for material circulation；
Heat exchanger tube is equipped with inside second chamber, the furnace wall of second chamber bottom is equipped with flue gas discharge opening.
As currently preferred technical solution, the coal-burning boiler includes furnace body and burner hearth, the upper side of second chamber
Wall is equipped with coal filling hole, is equipped with first longitudinal direction partition in burner hearth bottom in burner hearth and burner hearth interior zone is divided into what two tops were connected to
Chamber, respectively first chamber and second chamber；
Wherein, in first chamber internal upper part, at least 2 column fire tubes are equipped in first longitudinal direction bulkhead sides, by the at the top of fire tube
One apertured partition is fixed on first longitudinal direction partition and furnace roof, and first longitudinal direction partition is fixed on by the second apertured partition in fire tube bottom
On, the second apertured partition tilts to furnace bottom and is in 60 °~70 ° with first longitudinal direction partition；Second apertured partition is not secured to first
First chamber lower area is divided into the chamber of two bottoms connection to second longitudinal direction partition is had by one end of longitudinal baffle,
That is third chamber and the 4th chamber, the 4th chamber are located at below fire tube, and burnout degree entrance, third chamber bottom are set in the 4th chamber
Portion is equipped with fire grate, and the furnace body below fire grate is equipped with air port；
The first tilt clapboard is set in space in first chamber between fire tube and the furnace wall of separate first longitudinal direction partition,
First tilt clapboard tilts to lower portion of furnace body and is in 20 °~30 ° between furnace wall, and it is longitudinal that the first tilt clapboard lower end is equipped with third
Partition, there are the space circulated for material between third longitudinal baffle and fire tube, the first tilt clapboard upper end is equipped with downward the
Four longitudinal baffles, there are the spaces of supplied gas circulation between the 4th longitudinal baffle and furnace wall；
On second chamber top, at least 2 column fire tubes are set, fire tube length is less than the length for the fire tube being arranged in first chamber,
First longitudinal direction partition and furnace roof are fixed on by third apertured partition at the top of fire tube in second chamber, fire tube bottom passes through the 4th
Apertured partition is fixed on first longitudinal direction partition, the 4th apertured partition to first longitudinal direction partition side inclination and and first longitudinal direction every
It is in 10 °~20 ° between plate；
It is equipped with heat exchanger tube inside second chamber, heat exchanger tube is located at the space of fire tube lower part, on the furnace wall of second chamber bottom
Equipped with flue gas discharge opening.
Second aspect, the present invention provides the processing methods of above-mentioned coal-burning boiler, the treating method comprises following steps:
(a) fuel is added from coal filling hole, pyrolytic gasification is carried out under the action of the heat that fuel fire tube provides, generated burnt
Oil, pyrolysis gas and semicoke；
(b) tar, pyrolysis gas and the semicoke that step (a) generates move downward, and carry out coal-char combustion into coal-char combustion area,
Gas needed for coal-char combustion area burns is provided by the air port below fire grate；
(c) flue gas that step (b) coal-char combustion generates carries out high-temp combustion under burnout degree effect, in combustion process
The heat of generation is supplied to pyrolytic gasification by fire tube, and the flue gas heat exchange heel row after burning goes out furnace body.
As currently preferred technical solution, step (a) fuel is clean moulded coal.
Preferably, in step (a) pyrolytic gasification oxygen volume content be < 3%, such as 2.5%, 2%, 1.5% or
1% etc., it is not limited to cited numerical value, other interior unlisted numerical value of the numberical range are equally applicable.
Preferably, the temperature of step (a) pyrolytic gasification be 500 DEG C~700 DEG C, such as 500 DEG C, 550 DEG C, 600 DEG C,
650 DEG C or 700 DEG C etc., it is not limited to cited numerical value, other interior unlisted numerical value of the numberical range are equally applicable.
Preferably, the temperature of step (b) coal-char combustion be 870 DEG C~950 DEG C, such as 870 DEG C, 870 DEG C, 900 DEG C,
930 DEG C or 950 DEG C etc., it is not limited to cited numerical value, other interior unlisted numerical value of the numberical range are equally applicable.
Preferably, the oxygen content in step (b) coal-char combustion be 6%~8%, such as 6%, 6.5%, 7%,
7.5% or 8% etc., it is not limited to cited numerical value, other interior unlisted numerical value of the numberical range are equally applicable.
Preferably, oxygen content is 8%~10%, such as 8%, 8.5%, 9%, 9.5% in step (c) high-temp combustion
Or 10% etc., it is not limited to cited numerical value, other interior unlisted numerical value of the numberical range are equally applicable.
Preferably, the ignition temperature of step (c) high-temp combustion be 900 DEG C~1050 DEG C, such as 900 DEG C, 930 DEG C,
950 DEG C, 970 DEG C, 1000 DEG C, 1030 DEG C or 1050 DEG C etc., it is not limited to cited numerical value, in the numberical range other
Unlisted numerical value is equally applicable.
Preferably, the CO concentration in flue gas after step (c) burning is less than 300mg/Nm3, NOxConcentration is less than 200mg/
Nm3, SO2Concentration is less than 400mg/Nm3。
As currently preferred technical solution, it the treating method comprises following steps:
(a) fuel is added from coal filling hole, pyrolytic gasification is carried out under the action of the heat that fuel fire tube provides, generated burnt
Oil, pyrolysis gas and semicoke, wherein oxygen volume content is < 3% in pyrolytic gasification, and the temperature of pyrolytic gasification is 500 DEG C~700 DEG C；
(b) tar, pyrolysis gas and the semicoke that step (a) generates move downward, and carry out coal-char combustion into coal-char combustion area,
Wherein the temperature of coal-char combustion is 850 DEG C~950 DEG C, and the oxygen content in coal-char combustion is 6%~8%；
(c) flue gas that step (b) coal-char combustion generates carries out high-temp combustion under burnout degree effect, in combustion process
The heat of generation is supplied to pyrolytic gasification by fire tube, and the flue gas heat exchange heel row after burning goes out furnace body, wherein in high-temp combustion
Oxygen content is 8%~10%, and the ignition temperature of high-temp combustion is 900 DEG C~1050 DEG C, and the CO concentration in flue gas after burning is less than
300mg/Nm3, NOxConcentration is less than 200mg/Nm3, SO2Concentration is less than 400mg/Nm3。
Compared with prior art, the invention has the following advantages:
(1) present invention eliminates carbonization region oxygen using heat exchange pattern by adding fire tube in furnace interior
In the presence of to realize truly carbonization, pollutant discharge amount is effectively reduced in influence of the reduction oxygen to pyrolysis；
(2) present invention increases pyrogenation and carbonization heat exchange area, increases the heat of fuel by adding fire tube in furnace interior
Solution degree；
(3) present invention is by adding a possibility that furnace puff can be effectively reduced in pyrolysis gas circulating area；
(4) CO concentration in flue gas of coal-burning boiler discharge furnace body of the present invention is less than 300mg/Nm3, NOxConcentration is less than
200mg/Nm3, SO2Concentration is less than 400mg/Nm3, and the efficiency of combustion of boiler can further improve to 85%.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of coal-burning boiler described in the embodiment of the present invention 1；
Fig. 2 is the structural schematic diagram of coal-burning boiler described in the embodiment of the present invention 2；
Wherein, 1- coal filling hole, 2- first longitudinal direction partition, 3- fire tube, the first apertured partition of 4-, the second apertured partition of 5-, 6-
Second longitudinal direction partition, 7- burnout degree entrance, 8- fire grate, the air port 9-, the first tilt clapboard of 10-, 11- heat exchanger tube, the discharge of 12- flue gas
Mouthful, 13- third longitudinal baffle, the 4th longitudinal baffle of 14-, 15- third apertured partition, the 4th apertured partition of 16-.
Specific embodiment
In order to better illustrate the present invention, it is easy to understand technical solution of the present invention, below further specifically to the present invention
It is bright.But following embodiments is only simple example of the invention, does not represent or limit the scope of the present invention, this
Invention protection scope is subject to claims.
Specific embodiment of the invention mode part provides a kind of coal-burning boiler of fractional combustion, and the coal-burning boiler includes
Furnace body and burner hearth, furnace body top are equipped with coal filling hole 1, and burner hearth is interior to be equipped with first longitudinal direction partition 2 for burner hearth inner area in burner hearth bottom
Domain is divided into the chamber that two tops are connected to, respectively first chamber and second chamber；
Wherein, in first chamber internal upper part, it is equipped with fire tube 3 in first longitudinal direction bulkhead sides 2, passes through first band at the top of fire tube 3
Hole partition 4 is fixed on first longitudinal direction partition and furnace roof, and first longitudinal direction partition is fixed on by the second apertured partition 5 in 3 bottom of fire tube
Upper 2, second with holes is not secured to one end of first longitudinal direction partition 2 to second longitudinal direction partition 6 is had, by first chamber every 5 plates
Lower area is divided into the chamber of two bottoms connection, i.e. third chamber and the 4th chamber, and the 4th chamber is located at 3 lower section of fire tube,
Burnout degree entrance 7 is set in 4th chamber, third cavity bottom is equipped with fire grate 8, and the furnace body of 8 lower section of fire grate is equipped with air port 9；
In space in first chamber between fire tube 3 and furnace wall far from first longitudinal direction partition 1 the first inclination of setting every
Plate 10, the first tilt clapboard 10 is tilted to lower portion of furnace body, and there are the spaces passed through for material between fire tube 3；
Heat exchanger tube 11 is equipped with inside second chamber, the furnace wall of second chamber bottom is equipped with flue gas discharge opening 12.
The processing method of the coal-burning boiler the following steps are included:
(a) fuel is added from coal filling hole 2, pyrolytic gasification is carried out under the action of the heat that fuel fire tube 3 provides, generated burnt
Oil, pyrolysis gas and semicoke；
(b) tar, pyrolysis gas and the semicoke that step (a) generates move downward, and carry out coal-char combustion into coal-char combustion area；
(c) flue gas that step (b) coal-char combustion generates carries out high-temp combustion under burnout degree effect, in combustion process
The heat of generation is supplied to pyrolytic gasification by fire tube 3, and the flue gas heat exchange heel row after burning goes out furnace body.
The following are typical but non-limiting embodiments of the invention:
Embodiment 1:
Present embodiments provide a kind of coal-burning boiler of fractional combustion, as shown in Figure 1, the coal-burning boiler include furnace body and
Burner hearth is equipped with coal filling hole 1 in furnace body, charging gear is equipped at coal filling hole 1, is equipped in burner hearth in burner hearth bottom at the top of first chamber
Burner hearth interior zone is divided into the chamber that two tops are connected to, respectively first chamber and second chamber by first longitudinal direction partition 2；
Wherein, in first chamber internal upper part, 3~4 column fire tubes 3 is equipped in first longitudinal direction bulkhead sides 2, are passed through at the top of fire tube 3
First apertured partition 4 is fixed on first longitudinal direction partition 2 and furnace roof, and it is vertical that 3 bottom of fire tube by the second apertured partition 5 is fixed on first
To on partition 2, the second apertured partition 5 tilts to furnace bottom and is in 65 ° with first longitudinal direction partition 2；Second apertured partition 5 is not secured to
One end of first longitudinal direction partition 2 is divided into two bottom connections to second longitudinal direction partition 6 is had, by first chamber lower area
Chamber, i.e. third chamber and the 4th chamber, the 4th chamber are located at 3 lower section of fire tube, burnout degree entrance 7 are set in the 4th chamber, the
Three cavity bottoms are equipped with fire grate 8, and the furnace body of 8 lower section of fire grate is equipped with air port 9；
In space in first chamber between fire tube 3 and furnace wall far from first longitudinal direction partition 2 the first inclination of setting every
Plate 10,10 top of the first tilt clapboard are fixed on the furnace wall far from first longitudinal direction partition 2, and the first tilt clapboard 10 is under furnace body
Portion inclination and between furnace wall be in 25 °, 10 lower end of the first tilt clapboard be equipped with third longitudinal baffle 13, third longitudinal baffle 13 with
There are the spaces circulated for material between fire tube 3；
Heat exchanger tube 11 is equipped with inside second chamber, the furnace wall of second chamber bottom is equipped with flue gas discharge opening 12.
The processing method of the coal-burning boiler the following steps are included:
(a) fuel is added from coal filling hole 2, fuel is fallen on the first tilt clapboard 10, in the work for the heat that fire tube 3 provides
Pyrolytic gasification is carried out under, generates tar, pyrolysis gas and semicoke, wherein oxygen volume content < 3%, pyrolytic gasification in pyrolytic gasification
Temperature be 600 DEG C；
(b) tar, pyrolysis gas and the semicoke that step (a) generates are by the way that there are confessions between third longitudinal baffle 13 and fire tube 3
The space of material circulation moves downward, and carries out coal-char combustion into coal-char combustion area, and wherein the temperature of coal-char combustion is 900 DEG C,
Oxygen content in coal-char combustion is 7%；
(c) flue gas that step (b) coal-char combustion generates carries out high under the burnout degree effect that burnout degree entrance 7 is passed through
Temperature is burnt, and the heat generated in combustion process is supplied to pyrolytic gasification by fire tube 3, and the flue gas after burning passes through fire tube 3 and passes through
11 heat exchange heel row of heat exchanger tube goes out furnace body, and wherein oxygen content is 9% in high-temp combustion, and the ignition temperature of high-temp combustion is 1000
DEG C, the CO concentration in flue gas after burning is less than 290mg/Nm3, NOxConcentration is less than 180mg/Nm3, SO2Concentration is less than 360mg/Nm3。
The efficiency of combustion of boiler described in the present embodiment can further improve to 86%.
Embodiment 2:
Present embodiments provide a kind of coal-burning boiler of fractional combustion, as shown in Fig. 2, the coal-burning boiler include furnace body and
Burner hearth is equipped with coal filling hole 1 in furnace body, charging gear is equipped at coal filling hole 1, is equipped in burner hearth in burner hearth bottom at the top of first chamber
Burner hearth interior zone is divided into the chamber that two tops are connected to, respectively first chamber and second chamber by first longitudinal direction partition 2；
Wherein, in first chamber internal upper part, 3~4 column fire tubes 3 is equipped in 2 side of first longitudinal direction partition, are passed through at the top of fire tube 3
First apertured partition 4 is fixed on first longitudinal direction partition 2 and furnace roof, and it is vertical that 3 bottom of fire tube by the second apertured partition 5 is fixed on first
To on partition 2, the second apertured partition 5 tilts to furnace bottom and is in 60 ° with first longitudinal direction partition；Second apertured partition 5 is not secured to
One end of first longitudinal direction partition 2 is divided into two bottom connections to second longitudinal direction partition 6 is had, by first chamber lower area
Chamber, i.e. third chamber and the 4th chamber, the 4th chamber are located at 3 lower section of fire tube, burnout degree entrance 7 are set in the 4th chamber, the
Three cavity bottoms are equipped with fire grate 8, and the furnace body of 8 lower section of fire grate is equipped with air port 9；
In space in first chamber between fire tube 3 and furnace wall far from first longitudinal direction partition 2 the first inclination of setting every
Plate 10, it is in 30 ° between 70 ° that the first tilt clapboard 10, which tilts to lower portion of furnace body and is in first longitudinal direction partition, the first tilt clapboard
10 lower ends are equipped with third longitudinal baffle 13, and there are the spaces circulated for material, first to incline between third longitudinal baffle 13 and fire tube 3
10 upper end of inclined clapboard is equipped with the 4th downward longitudinal baffle 14, and there are supplied gas circulations between the 4th longitudinal baffle 14 and furnace wall
Space；
3~4 column fire tubes 3 are set on second chamber top, 3 length of fire tube is less than the length for the fire tube 3 being arranged in first chamber
It spends, first longitudinal direction partition 2 and furnace roof, 3 bottom of fire tube is fixed on by third apertured partition 15 at the top of the fire tube 3 in second chamber
It is fixed on first longitudinal direction partition by the 4th apertured partition 16, the 4th apertured partition 16 is tilted to 2 side of first longitudinal direction partition
It and is in 15 ° between first longitudinal direction partition 2；
Heat exchanger tube 8 is equipped with inside second chamber, heat exchanger tube 8 is located at the space of 3 lower part of fire tube, the furnace wall of second chamber bottom
It is equipped with flue gas discharge opening 12.
The processing method of the coal-burning boiler the following steps are included:
(a) fuel is added from coal filling hole 2, the fire tube 3 being arranged in second chamber and first chamber is mentioned in fire tube 3
Pyrolytic gasification is carried out under the action of the heat of confession, generates tar, pyrolysis gas and semicoke, wherein oxygen volume content is in pyrolytic gasification
< 3%, the temperature of pyrolytic gasification are 500 DEG C；
(b) tar, pyrolysis gas semicoke of step (a) generation are by the way that there are for object between third longitudinal baffle 13 and fire tube 3
The logical space of stream moves downward, while pyrolysis gas also passes through between the 4th longitudinal baffle 14 and furnace wall that there are supplied gas circulations
Space enters coal-char combustion area and carries out coal-char combustion, and wherein the temperature of coal-char combustion is 850 DEG C, and the oxygen content in coal-char combustion is
6%；
(c) flue gas that step (b) coal-char combustion generates carries out high under the burnout degree effect that burnout degree entrance 7 is passed through
Temperature is burnt, and the heat generated in combustion process is supplied to pyrolytic gasification by fire tube 3, and the flue gas after burning passes through fire tube 3 and passes through
11 heat exchange heel row of heat exchanger tube goes out furnace body, and wherein oxygen content is 8% in high-temp combustion, and the ignition temperature of high-temp combustion is 900 DEG C,
CO concentration in flue gas after burning is less than 280mg/Nm3, NOxConcentration is less than 175mg/Nm3, SO2Concentration is less than 360mg/Nm3。
The efficiency of combustion of boiler described in the present embodiment can further improve to 87%.
Embodiment 3:
A kind of coal-burning boiler of fractional combustion is present embodiments provided, the structure of the coal-burning boiler is referring in embodiment 2
Structure, difference are: 10 top of the first tilt clapboard is fixed on the furnace wall far from first longitudinal direction partition 2, the second apertured partition 5
It is tilted to furnace bottom and is in 70 ° with first longitudinal direction partition, the first tilt clapboard 10, which tilts to lower portion of furnace body and between furnace wall, is in
20 °, the 4th apertured partition 16 tilts to 2 side of first longitudinal direction partition and is in 20 ° between first longitudinal direction partition 2.
The processing method of the coal-burning boiler is only that referring to method in embodiment 2, difference: pyrolytic gasification in step (a)
Temperature be 700 DEG C, the temperature of burnt burning is 950 DEG C in step (b), and the oxygen content in coal-char combustion is 8%, in step (c)
Oxygen content is 10% in high-temp combustion, and the ignition temperature of high-temp combustion is 1050 DEG C.
The CO concentration in flue gas of the discharge of boiler described in the present embodiment is less than 300mg/Nm3, NOxConcentration is less than 200mg/Nm3,
SO2Concentration is less than 400mg/Nm3, efficiency of combustion can further improve to 85%.
Comparative example 1:
This comparative example provides a kind of coal-burning boiler of fractional combustion, and the structure of the coal-burning boiler is referring in embodiment 1
The structure of boiler, difference are: being not provided with fire tube 3 in first chamber, i.e., fire tube 3 is arranged no longer as pyrolytic gasification and provides heat simultaneously
Oxygen is eliminated, pyrolytic gasification carries out under 500 DEG C~550 DEG C oxygen lean conditions.
Fire tube 3 is not provided in this comparative example, in first chamber can be such that pyrolysis does not carry out effectively, and then make that boiler is discharged
CO concentration in flue gas is greater than 450mg/Nm3, NOxConcentration is greater than 400mg/Nm3, SO2Concentration is greater than 600mg/Nm3, the burning of boiler
Efficiency is only 75%.
Comparative example 2:
This comparative example provides a kind of coal-burning boiler of fractional combustion, and the structure of the coal-burning boiler is referring in embodiment 2
The structure of boiler, difference are: being not provided with fire tube 3 in first chamber and in second chamber, i.e., no longer setting fire tube 3 is pyrolysis gas
Change and heat is provided and eliminates oxygen, pyrolytic gasification carries out under 500 DEG C~550 DEG C oxygen lean conditions, and coal filling hole 1 is set to the first chamber
Room top.
In this comparative example, being not provided with fire tube 3 in first chamber and in second chamber can be such that pyrolysis does not carry out effectively, in turn
Make that NO in the flue gas of boiler is dischargedxHeight, CO concentration are greater than 450mg/Nm3, NOxConcentration is greater than 450mg/Nm3, SO2Concentration is greater than
600mg/Nm3, the efficiency of combustion of boiler is only 75%.
The present invention be can be seen that with comparative example based on the above embodiments by adding fire tube in furnace interior, passed using heat
The mode of leading eliminates the presence of carbonization region oxygen, to realize truly carbonization, reduces oxygen to the shadow of pyrolysis
It rings, pollutant discharge amount is effectively reduced；
The present invention increases pyrogenation and carbonization heat exchange area, increases the pyrolysis of fuel by adding fire tube in furnace interior
Degree；
The present invention is by adding a possibility that furnace puff can be effectively reduced in pyrolysis gas circulating area；
The CO concentration in flue gas of coal-burning boiler discharge furnace body of the present invention is less than 300mg/Nm3, NOxConcentration is less than
200mg/Nm3, SO2Concentration is less than 400mg/Nm3, and the efficiency of combustion of boiler can further improve to 85%.
The Applicant declares that the present invention is explained by the above embodiments detailed process equipment and process flow of the invention,
But the present invention is not limited to the above detailed process equipment and process flow, that is, it is above-mentioned detailed not mean that the present invention must rely on
Process equipment and process flow could be implemented.It should be clear to those skilled in the art, any improvement in the present invention,
Addition, selection of concrete mode of equivalence replacement and auxiliary element to each raw material of product of the present invention etc., all fall within of the invention
Within protection scope and the open scope.
Claims (10)
1. a kind of coal-burning boiler of fractional combustion, which is characterized in that the coal-burning boiler includes furnace body and burner hearth, is set at the top of furnace body
There is coal filling hole, is equipped with first longitudinal direction partition in burner hearth bottom in burner hearth and burner hearth interior zone is divided into the chamber that two tops are connected to
Room, respectively first chamber and second chamber；
Wherein, in first chamber internal upper part, it is equipped with fire tube in first longitudinal direction bulkhead sides, is consolidated at the top of fire tube by the first apertured partition
Due to first longitudinal direction partition and furnace roof, fire tube bottom is fixed on first longitudinal direction partition by the second apertured partition, and second is with holes
Partition is not secured to one end of first longitudinal direction partition to second longitudinal direction partition is had, and first chamber lower area is divided into two
The chamber of bottom connection, i.e. third chamber and the 4th chamber, the 4th chamber are located at below fire tube, set burnout degree in the 4th chamber
Entrance, third cavity bottom are equipped with fire grate, and the furnace body below fire grate is equipped with air port；
First tilt clapboard is set in the space in first chamber between fire tube and furnace wall far from first longitudinal direction partition, first
Tilt clapboard is tilted to lower portion of furnace body, and there are the spaces passed through for material between fire tube；
Heat exchanger tube is equipped with inside second chamber, the furnace wall of second chamber bottom is equipped with flue gas discharge opening.
2. coal-burning boiler according to claim 1, which is characterized in that be equipped with charging gear at the coal filling hole；
Preferably, the coal filling hole is set at the top of first chamber；
Preferably, the coal filling hole is set to the upper portion side wall of second chamber.
3. coal-burning boiler according to claim 1 or 2, which is characterized in that number >=2 of the fire tube, preferably 12
It is a~16；
Preferably, second apertured partition is tilted to furnace bottom；
Preferably, second apertured partition tilts to furnace bottom and is in 60 °~70 ° with first longitudinal direction partition.
4. coal-burning boiler according to claim 1-3, which is characterized in that first tilt clapboard is under furnace body
Portion tilts and is in 20 °~30 ° between furnace wall；
Preferably, first tilt clapboard top is fixed on the furnace wall far from first longitudinal direction partition；
Preferably, first tilt clapboard lower end is equipped with third longitudinal baffle, and there are confessions between third longitudinal baffle and fire tube
The space of material circulation；
Preferably, first tilt clapboard upper end is equipped with the 4th downward longitudinal baffle, between the 4th longitudinal baffle and furnace wall
There are the spaces of supplied gas circulation.
5. coal-burning boiler according to claim 1-4, which is characterized in that when coal filling hole is set to second chamber
When upper portion side wall, fire tube is set on second chamber top, first longitudinal direction partition is fixed on by third apertured partition in fire tube top
And furnace roof, fire tube bottom are fixed on first longitudinal direction partition by the 4th apertured partition, the heat exchanger tube in second chamber is located at fire
Space below pipe；
Preferably, length of the fire tube length being arranged in the second chamber no more than the fire tube being arranged in first chamber；
Preferably, the 4th apertured partition is tilted to first longitudinal direction partition side；
Preferably, the 4th apertured partition to first longitudinal direction partition side tilt and between first longitudinal direction partition in 10 °~
20°。
6. coal-burning boiler according to claim 1-5, which is characterized in that the coal-burning boiler includes furnace body and furnace
Thorax, is equipped with coal filling hole in furnace body at the top of first chamber, be equipped with first longitudinal direction partition for burner hearth inner area in burner hearth bottom in burner hearth
Domain is divided into the chamber that two tops are connected to, respectively first chamber and second chamber；
Wherein, in first chamber internal upper part, at least 2 column fire tubes is equipped in first longitudinal direction bulkhead sides, pass through first band at the top of fire tube
Hole partition is fixed on first longitudinal direction partition and furnace roof, and fire tube bottom is fixed on first longitudinal direction partition by the second apertured partition,
Second apertured partition tilts to furnace bottom and is in 60 °~70 ° with first longitudinal direction partition；Second apertured partition is not secured to first longitudinal direction
First chamber lower area is divided into the chamber of two bottoms connection to having second longitudinal direction partition by one end of partition, i.e., and the
Three chambers and the 4th chamber, the 4th chamber are located at below fire tube, burnout degree entrance are set in the 4th chamber, third cavity bottom is set
There is fire grate, the furnace body below fire grate is equipped with air port；
First tilt clapboard is set in the space in first chamber between fire tube and furnace wall far from first longitudinal direction partition, first
Tilt clapboard top is fixed on the furnace wall far from first longitudinal direction partition, and the first tilt clapboard is tilted to lower portion of furnace body and and furnace wall
Between be in 20 °~30 °, the first tilt clapboard lower end be equipped with third longitudinal baffle, there are confessions between third longitudinal baffle and fire tube
The space of material circulation；
Heat exchanger tube is equipped with inside second chamber, the furnace wall of second chamber bottom is equipped with flue gas discharge opening.
7. coal-burning boiler according to claim 1-5, which is characterized in that the coal-burning boiler includes furnace body and furnace
Thorax, the upper portion side wall of second chamber are equipped with coal filling hole, and burner hearth is interior to be equipped with first longitudinal direction partition for burner hearth inner area in burner hearth bottom
Domain is divided into the chamber that two tops are connected to, respectively first chamber and second chamber；
Wherein, in first chamber internal upper part, at least 2 column fire tubes is equipped in first longitudinal direction bulkhead sides, pass through first band at the top of fire tube
Hole partition is fixed on first longitudinal direction partition and furnace roof, and fire tube bottom is fixed on first longitudinal direction partition by the second apertured partition,
Second apertured partition tilts to furnace bottom and is in 60 °~70 ° with first longitudinal direction partition；Second apertured partition is not secured to first longitudinal direction
First chamber lower area is divided into the chamber of two bottoms connection to having second longitudinal direction partition by one end of partition, i.e., and the
Three chambers and the 4th chamber, the 4th chamber are located at below fire tube, burnout degree entrance are set in the 4th chamber, third cavity bottom is set
There is fire grate, the furnace body below fire grate is equipped with air port；
First tilt clapboard is set in the space in first chamber between fire tube and furnace wall far from first longitudinal direction partition, first
Tilt clapboard tilts to lower portion of furnace body and is in 20 °~30 ° between furnace wall, the first tilt clapboard lower end be equipped with third it is longitudinal every
Plate, there are the space circulated for material between third longitudinal baffle and fire tube, the first tilt clapboard upper end is equipped with downward the 4th
Longitudinal baffle, there are the spaces of supplied gas circulation between the 4th longitudinal baffle and furnace wall；
On second chamber top, at least 2 column fire tubes are set, fire tube length is less than the length of fire tube being arranged in first chamber, and second
First longitudinal direction partition and furnace roof are fixed on by third apertured partition at the top of fire tube in chamber, fire tube bottom is with holes by the 4th
Partition is fixed on first longitudinal direction partition, the 4th apertured partition to first longitudinal direction partition side tilt and with first longitudinal direction partition it
Between be in 10 °~20 °；
Heat exchanger tube is equipped with inside second chamber, heat exchanger tube is located at the space of fire tube lower part, and the furnace wall of second chamber bottom is equipped with
Flue gas discharge opening.
8. the processing method of coal-burning boiler according to claim 1-7, which is characterized in that the processing method packet
Include following steps:
(a) fuel is added from coal filling hole, pyrolytic gasification is carried out under the action of the heat that fuel fire tube provides, generate tar, heat
It vents one's spleen and semicoke；
(b) tar, pyrolysis gas and the semicoke that step (a) generates move downward, and carry out coal-char combustion into coal-char combustion area；
(c) flue gas that step (b) coal-char combustion generates carries out high-temp combustion under burnout degree effect, generates in combustion process
Heat pyrolytic gasification is supplied to by fire tube, the flue gas heat exchange heel row after burning goes out furnace body.
9. processing method according to claim 8, which is characterized in that step (a) fuel is clean moulded coal；
Preferably, oxygen volume content is < 3% in step (a) pyrolytic gasification；
Preferably, the temperature of step (a) pyrolytic gasification is 500 DEG C~700 DEG C；
Preferably, the temperature of step (b) coal-char combustion is 870 DEG C~950 DEG C；
Preferably, the oxygen content in step (b) coal-char combustion is 6%~8%；
Preferably, oxygen content is 8%~10% in step (c) high-temp combustion；
Preferably, the ignition temperature of step (c) high-temp combustion is 900 DEG C~1050 DEG C；
Preferably, the CO concentration in flue gas after step (c) burning is less than 300mg/Nm3, NOxConcentration is less than 200mg/Nm3,
SO2Concentration is less than 400mg/Nm3。
10. processing method according to claim 8 or claim 9, which is characterized in that the treating method comprises following steps:
(a) fuel is added from coal filling hole, pyrolytic gasification is carried out under the action of the heat that fuel fire tube provides, generate tar, heat
It vents one's spleen and semicoke, wherein oxygen volume content is < 3% in pyrolytic gasification, and the temperature of pyrolytic gasification is 500 DEG C~700 DEG C；
(b) tar, pyrolysis gas and the semicoke that step (a) generates move downward, and carry out coal-char combustion into coal-char combustion area, wherein
The temperature of coal-char combustion is 850 DEG C~950 DEG C, and the oxygen content in coal-char combustion is 6%~8%；
(c) flue gas that step (b) coal-char combustion generates carries out high-temp combustion under burnout degree effect, generates in combustion process
Heat pyrolytic gasification is supplied to by fire tube, the flue gas heat exchange heel row after burning goes out furnace body, and wherein oxygen contains in high-temp combustion
Amount is 8%~10%, and the ignition temperature of high-temp combustion is 900 DEG C~1050 DEG C, and the CO concentration in flue gas after burning is less than
300mg/Nm3, NOxConcentration is less than 200mg/Nm3, SO2Concentration is less than 400mg/Nm3。
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| CN201811405615.7A CN109578978B (en) | 2018-11-23 | 2018-11-23 | Environment-friendly coal-fired boiler achieving staged combustion and treatment method thereof |
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| CN2061173U (en) * | 1989-09-23 | 1990-08-29 | 马东生 | High efficiency energy-saving dual-purpose stove for drying and dry distillation |
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Address after: No. 28 Shunhua Road, High tech Zone, Jinan City, Shandong Province, 250014 Patentee after: SHANDONG ENERGY GROUP Co.,Ltd. Patentee after: YANKUANG TECHNOLOGY Co.,Ltd. Address before: 273500 Shandong city of Jining province Zoucheng City Fushan Road No. 298 Patentee before: YANKUANG GROUP Co.,Ltd. Patentee before: YANKUANG TECHNOLOGY Co.,Ltd. |
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