CN110006034A - Reduce the optimization air distribution method of W type flame furnace NOx emission and clinker coking - Google Patents
Reduce the optimization air distribution method of W type flame furnace NOx emission and clinker coking Download PDFInfo
- Publication number
- CN110006034A CN110006034A CN201910250674.XA CN201910250674A CN110006034A CN 110006034 A CN110006034 A CN 110006034A CN 201910250674 A CN201910250674 A CN 201910250674A CN 110006034 A CN110006034 A CN 110006034A
- Authority
- CN
- China
- Prior art keywords
- secondary air
- aperture
- air register
- register
- layers
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C7/00—Combustion apparatus characterised by arrangements for air supply
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N3/00—Regulating air supply or draught
- F23N3/06—Regulating air supply or draught by conjoint operation of two or more valves or dampers
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
Abstract
The invention discloses a kind of optimization air distribution methods for reducing W type flame furnace NOx emission and clinker coking.It include D layers of vertical wall secondary air register, E layers of vertical wall secondary air register aperture be respectively 5%, 7%；According to unit load, F layers of vertical wall secondary air register, arch wall secondary air register one, arch wall secondary air register two aperture be respectively 35%, 15%, 30~60%, lack of gas secondary air register one is identical with the aperture of lack of gas secondary air register two, is all 30~60%；The differential pressure for controlling secondary air box is 0.3-0.88Kpa, and operation oxygen amount is 3.5-6.0%, and the differential pressure of the higher control secondary air box of unit load is higher, and unit load is higher, and control operation oxygen amount is lower；Wherein, differential pressure of the differential pressure of secondary air box between secondary air box and furnace pressure；The aperture of control centre's OFA secondary air register is 75-85%, and the aperture of circumference OFA secondary air register is 15-20%；Control milling pipe outlet pressure is 2.6-4.8Kpa.While this method can reduce NOX generation, moreover it is possible to reduce boiler coke.
Description
Technical field
The present invention relates to the field of combustion technology of W type flame furnace, it is more particularly related to which a kind of reduction W type is fiery
The optimization air distribution method of flame furnace NOx emission and clinker coking.
Background technique
The boiler technology that many thermal power plants use at present is supercritical parameter transformation direct current cooker, single burner hearth, once
Reheating, balanced draft, outdoor arrangement, dry ash extraction, all steel framework, " W " type flame combustion, vertical rifled waterwall, Π
Type transformation direct current cooker.Boiler uses the mixed coal of conventional anthracite and indigenous coal.Boiler coal-ash combustion apparatus is using novel
Bispin air duct fuel preheating moulded coal powder burner and " lack of gas -- burnout degree " combustion system, in the anthracite for adapting to low-volatile
On the basis of burning, the concentration of emission of NOx can be substantially reduced.Burner Parallel Symmetric is arranged on the chimney arch of lower furnace portion,
Forward and backward each 18.Boiler matches 6 sets of pulverized coal preparation systems, is that cold primary air fan positive pressure is direct-firing, and every set system includes 1 and goes with each other all the time
Coal pulverizer.
Referring to Fig.1, Secondary Air required for burning comes from bellows, from air duct of the Secondary Air through boiler two sides that air preheater comes
Front-back wall bellows are sent into, air port upper from boiler arch, under arch and burnout degree nozzle enter burner hearth.Bellows are separated with partition, that
This independence, making each burner respectively is a unit, it can be achieved that individually adjusting.Each unit (burner) air quantity is adjusted by D layers
Vertical wall secondary air register, E layers of vertical wall secondary air register, F layers of vertical wall secondary air register, arch wall secondary air register 1, arch wall Secondary Air
Door 28, center OFA secondary air register 3, circumference OFA secondary air register 4 control, and arch wall secondary air register 28 adjusts burner coal dust spout
7 circumference air quantity, arch wall secondary air register 1 control the air quantity of torch oil gun 5 and oil fire inspection.D layers of vertical wall secondary air register, E layers
Vertical wall secondary air register, vertical wall secondary air register F control encircle lower vertical wall Secondary Air, D, E layers of vertical wall secondary air register be it is manual,
Vertical wall secondary air register F is that pneumatic, all manual baffle generally no longer makes adjustments after firing optimization, except on-fuel or
Biggish variation has occurred in combustion conditions.Circumference OFA secondary air register 4, center OFA secondary air register 3 be it is pneumatic, control after-flame respectively
The circumferential direction and centre wind secondary air flow of wind.With the one-to-one 36 lack of gas-after-flame wind combustor of bispin air duct coal burner,
It is evenly arranged on the front-back wall above boiler cove boiler cove, each lack of gas-after-flame wind combustor includes 1 burnout degree center nozzle
1 with burnout degree circumferential direction spout 2.Electric butterfly valve on blast pipe 11, for adjusting the lack of gas drawn from cyclone cylinder coal burner
Amount, to adjust the air capacity of coal dust spout 7, i.e. coal powder density.Corresponding each bispin air duct coal burner, on boiler arch all
It is disposed with a concentric fire air nozzle, which is made of circumferential wind snout 2 and center wind snout 1, lack of gas Secondary Air
The flow of door 1 and 2 13 co- controlling center wind snout 1 of lack of gas secondary air register, fire air nozzle is by jet stream along horizontal alignment
In lower 30 ° of penetrating furnaces.This is the general facilities that the burner of current W type flame furnace is connected to burner hearth.
Although W flame furnace in terms of steady combustion with advantage, the characteristic for also having easy coking, NOx concentration higher, and conduct
The adjustment of lack of gas wind, the adjustment of boiler oxygen amount of NOX main means are adjusted, and boiler coke is had a huge impact, constrains NOx
Adjustment.During carrying out firing optimization, by opening big lack of gas wind, although NOx index can reduce, burner hearth coking adds
Weight, or even influence the safe operation of boiler.Therefore, under existing equipment situation, drop boiler export NOx concentration gradually
It is low, while ensuring that boiler coke does not aggravate, or even without coking, the technical issues of being current urgent need to resolve.
Summary of the invention
In view of the above-mentioned problems, the present invention obtains matching for optimization by each pipeline valve aperture of rationally control burner
Wind mode, so that while reducing NOX generation, moreover it is possible to reduce boiler coke, overcome and be difficult to realize Nox generation in the prior art
The problem reduced simultaneously with boiler coke.
In order to realize that object of the present invention and other advantages, the present invention reduce W type flame furnace NOx emission and clinker knot
Burnt optimization air distribution method, including following aspect:
1) it is 6-8% that the aperture of D layers of vertical wall secondary air register, which is the aperture of 4-6%, E layers of vertical wall secondary air register,；
2) according to unit load, the aperture of F layers of vertical wall secondary air register is 20~35%, lack of gas secondary air register one and lack of gas
The aperture of secondary air register two is identical, is all 30~60%, and the aperture of arch wall secondary air register one is 5~15%, arch wall secondary air register
Two aperture is 30~60%；
3) differential pressure for controlling secondary air box is 0.3-0.88Kpa, and operation oxygen amount is 3.5-6.0%, the higher control of unit load
The differential pressure of secondary air box processed is higher, and unit load is higher, and control operation oxygen amount is lower；Wherein, the differential pressure of secondary air box is Secondary Air
Differential pressure between case and furnace pressure；
4) aperture of control centre OFA secondary air register is 75-85%, and the aperture of circumference OFA secondary air register is 15-20%；
5) control milling pipe outlet pressure is 2.6-4.8Kpa.
Preferably, when the unit load is 450MW, the aperture of F layers of vertical wall secondary air register is 25%, and lack of gas are secondary
Air door one is identical with the aperture of lack of gas secondary air register two, is all 30%, and the aperture of arch wall secondary air register one is 5%, and arch wall is secondary
The aperture of air door two is 30%, and the differential pressure for controlling secondary air box is 0.3-0.7Kpa, and operation oxygen amount is 5.0-6.0%, center OFA
The aperture of secondary air register is 75%, and the aperture of circumference OFA secondary air register is 15%, and milling pipe outlet pressure is 3.0-4.0Kpa, D
The aperture of layer vertical wall secondary air register is 5%, the aperture of E layers of vertical wall secondary air register is 7%.
Preferably, when the unit load is 500MW, the aperture of F layers of vertical wall secondary air register is 30%, and lack of gas are secondary
Air door one is identical with the aperture of lack of gas secondary air register two, is all 30%, and the aperture of arch wall secondary air register one is 8%, and arch wall is secondary
The aperture of air door two is 35%, and the differential pressure for controlling secondary air box is 0.5-0.75Kpa, and operation oxygen amount is 5.0-6.0%, center
The aperture of OFA secondary air register is 75%, and the aperture of circumference OFA secondary air register is 15%, and milling pipe outlet pressure is 3.0-
The aperture of 4.5Kpa, D layers of vertical wall secondary air register is 5%, the aperture of E layers of vertical wall secondary air register is 7%.
Preferably, when the unit load is 550MW, the aperture of F layers of vertical wall secondary air register is 30%, and lack of gas are secondary
Air door one is identical with the aperture of lack of gas secondary air register two, is all 30~35%, and the aperture of arch wall secondary air register one is 10%, arch wall
The aperture of secondary air register two is 40%, and the differential pressure for controlling secondary air box is 0.65-0.75Kpa, and operation oxygen amount is 4.2-4.8%,
The aperture of center OFA secondary air register is 75%, and the aperture of circumference OFA secondary air register is 15%, and milling pipe outlet pressure is 3.0-
The aperture of 4.5Kpa, D layers of vertical wall secondary air register is 5%, the aperture of E layers of vertical wall secondary air register is 7%.
Preferably, when the unit load is 600MW, the aperture of F layers of vertical wall secondary air register is 32%, and lack of gas are secondary
Air door one is identical with the aperture of lack of gas secondary air register two, is all 30-35%, and the aperture of arch wall secondary air register one is 12%, arch wall
The aperture of secondary air register two is 45%, and the differential pressure for controlling secondary air box is 0.68-0.78Kpa, and operation oxygen amount is 3.8-4.3%,
The aperture of center OFA secondary air register is 75%, and the aperture of circumference OFA secondary air register is 15%, and milling pipe outlet pressure is 3.5-
The aperture of 4.5Kpa, D layers of vertical wall secondary air register is 5%, the aperture of E layers of vertical wall secondary air register is 7%.
Preferably, when the unit load is 630MW, the aperture of F layers of vertical wall secondary air register is 33%, and lack of gas are secondary
Air door one is identical with the aperture of lack of gas secondary air register two, is all 35-40%, and the aperture of arch wall secondary air register one is 15%, arch wall
The aperture of secondary air register two is 50%, and the differential pressure for controlling secondary air box is 0.68-0.78Kpa, and operation oxygen amount is 3.7-4.7%,
The aperture of center OFA secondary air register is 75%, and the aperture of circumference OFA secondary air register is 15%, and milling pipe outlet pressure is 3.0-
The aperture of 4.5Kpa, D layers of vertical wall secondary air register is 5%, the aperture of E layers of vertical wall secondary air register is 7%.
Preferably, when the unit load is 670MW, the aperture of F layers of vertical wall secondary air register is 35%, and lack of gas are secondary
Air door one is identical with the aperture of lack of gas secondary air register two, is all 35-40%, and the aperture of arch wall secondary air register one is 15%, arch wall
The aperture of secondary air register two is 50%, and the differential pressure for controlling secondary air box is 0.78-0.88Kpa, and operation oxygen amount is 3.5-4.5%,
The aperture of center OFA secondary air register is 85%, and the aperture of circumference OFA secondary air register is 15%, and milling pipe outlet pressure is 3.0-
The aperture of 4.8Kpa, D layers of vertical wall secondary air register is 5%, the aperture of E layers of vertical wall secondary air register is 7%.
The present invention is include at least the following beneficial effects: the present invention by the vertical wall secondary air register D of optimal control burner,
Vertical wall secondary air register E, vertical wall secondary air register F, arch wall secondary air register one, arch wall secondary air register two, and pass through control lack of gas
Secondary air register one is identical with the aperture of lack of gas secondary air register two, is all 30~60%, and the aperture of center OFA secondary air register is 75-
85%, spray suitable Secondary Air entrainment portions coal dust from lack of gas-burnout degree burner centre wind snout, not only on arch
Square region burner hearth wall-cooling surface forms oxidizing atmosphere, promotes burning, and reduce the oxygen amount and burner hearth in burnout degree region
Temperature thereby inhibits the thermal NO x formed under nitrogen molecular hot conditions in air, generally reduces raw in combustion process
At NOx.And circumference OFA secondary air register control aperture is controlled to the circumferential air quantity of burnout degree for 15-20%, make the after-flame on arch
Wind jet stream is sprayed from circumferential spout, has stronger burner hearth penetration capacity, and can roll up the flue gas that flows up of suction and abundant therewith
Mixing, provides staged air distribution for the later period after-flame and low NOx drainage of carbon particle, so that realizing reduces NOx emission and reduction clinker
Coking, and cinder form is normal, and burning is abundant.
The aperture of center OFA secondary air register is fixed as 75%, the aperture of circumference OFA secondary air register is fixed as 15%, makes
It is bigger than the air-flow rigidity that circumferential spout sprays to obtain the air-flow that center wind snout sprays, guarantees that arch top coal dust has enough rigidity,
Prevent coal dust adherent.
Detailed description of the invention
Fig. 1 is prior art W type flame furnace structural schematic diagram；
Fig. 2 is the part the III enlarged structure schematic diagram of Fig. 1.
Wherein, center wind snout 1, circumferential spout 2, center OFA secondary air register 3, circumference OFA secondary air register 4, oil gun 5, arch
Wall secondary air register 1, coal dust spout 7, arch wall secondary air register 28, cyclone cylinder separator 9, even point of device 10 of coal dust, lack of gas air hose
11, lack of gas secondary air register 1, lack of gas secondary air register 2 13.
Specific embodiment
Method of the invention is to analyze to obtain by test of many times, concrete operations and knot below by way of multiple Adjustment Tests
Fruit illustrates of the invention to grope test process.
Constantly D layers of vertical wall secondary air register of adjustment, E layers of vertical wall secondary air register, F layers of vertical wall secondary air register, lack of gas two
Secondary air door one, lack of gas secondary air register two, arch wall secondary air register one, arch wall secondary air register two, center OFA secondary air register and circumference
The aperture of OFA secondary air register, and the differential pressure of control secondary air box, operation oxygen amount and milling pipe exit pressure levels, wherein secondary
Differential pressure of the differential pressure of bellows between secondary air box and furnace pressure.Referring specifically to the first to the 14th of table one, table two and table three
Secondary adjustment situation can reduce W type flame from the adjustment in table the results show that also hardly result in and how to pass through change air distribution mode
Furnace NOx emission and reduction clinker coking, inventor combine the adjustment data of table one, table two and table three to be analyzed as follows:
Table one:
In Table 1, under 600MW unit load, during being adjusted to second of adjustment for the first time, F layers of vertical wall two
Secondary throttle opening is reduced to 25% by 30%, and the aperture of lack of gas secondary air register one and two increases to 25% by 15%, and oxygen amount is by 5.5%
Drop to 4.9%, NOXConcentration is by 2226mg/Nm3Drop to 1410mg/Nm3, NOXDecline is obvious, peephole fire box temperature on
It rises, coke button molten condition is aggravated within 1500 DEG C, but in clinker for control, therefore clinker and NOXConcentration is all unsatisfactory for wanting
It asks, economy is low.
During carrying out third time adjustment and the 4th adjustment, oxygen amount drops to 4.7% by 4.9%, then drops to 4.1%, the
It is increased in four adjustment and encircles lower F layers of vertical wall secondary air register aperture, it is unaffected to ensure to encircle lower oxygen amount, increase arch wall Secondary Air
One aperture of door.Adjusted NOXConcentration is by 1219mg/Nm3Drop to 1127mg/Nm3, NOXFurther decline, send air-introduced machine electric current bright
Aobvious to reduce, peephole fire box temperature and flame forms variation less, but are still molten condition, third time ratio outside coke button in clinker
The amount of the clinker molten condition of second of adjustment is reduced, and the amount of the 4th clinker molten condition with third time adjustment does not have
Variation.Make NO in the case where burner hearth coking does not have aggravation by the optimization firing optimization on the same dayXConcentration is decreased obviously, with symbol
Close NOXDischarge standard.
During carrying out the 5th time and the 6th time adjustment, F layers of vertical wall secondary air register aperture are become 40% from 35%, arch
One aperture of wall secondary air register drops to 20% by 30%, and two aperture of arch wall secondary air register is raised to 35% by 30%, and circumference OFA air door is opened
Degree drops to 15% by 25%, and oxygen amount drops to 3.8% by 4.8%, and secondary air box wind differential pressure is also dropped to by 0.87KPa therewith
0.62KPa.This air distribution mode purpose further decreases boiler Whole Oxygen under the premise of burner region oxygen amount under ensuring to encircle
Amount, while attempting uniform burner hearth oxygen amount deviation twice.It is adjusted, NOXConcentration is by 1413mg/Nm3Drop to 1253mg/Nm3, send and draw
Blower electric current is substantially reduced, and furnace exit temperature is declined, and coke button molten condition is reduced in the clinker of the 6th adjustment, is tended to
Common coke button, the quantity of slag is few, more normally, but NO also cannot be achievedXConcentration is effectively reduced.It burns and adjusts by the optimization on the same day
It is whole, in the case where burner hearth coking does not have aggravation, make NOXConcentration is decreased obviously, to meet NOXDischarge standard.
Table two:
In table two, unit load is promoted to 670MW, under full capacity, by time being adjusted from the 7th time to the 8th
Cheng Zhong, the furnace heating surface tube wall temperature of the 7th adjustment feature low in intermediate high two sides, reflects along the wide intermediate position of furnace
Thermic load is higher compared with two sides, in addition oxygen amount is also that intermediate low both sides are high, the condition of burner hearth coking easy to form, from falling for each slag bucket
The quantity of slag is it is also seen that the slag bucket quantity of slag is slightly more.To reduce coking in the middle part of burner hearth, the 8th adjustment opening arch wall secondary air register two
Degree drops to 50% by 60%, and center OFA secondary air register aperture drops to 65% by 70%, and circumference OFA secondary air register aperture is by 30%
20% is dropped to, increases oxygen amount under burner hearth intermediate arches suitably, overall oxygen amount reduces by 0.2%, adjusts for the 5th time and the 6th time
Each vertically-supplying air of D, E layer be 0~30%, very unevenly, the 7th time and the 8th time adjustment by D, E layer each vertically-supplying air respectively it is uniform admittedly
It is scheduled on 10% and 15%.Adjusted, clinker form is improved, and in terms of slag bucket, coke dropping is mostly the common coke button of solid-state loosely,
The char particle of molten condition is less, pressure fan current reduction, but NOXConcentration increases.
Oxygen amount is reduced in the 9th time and the tenth time adjustment, and is adjusted to above secondary air flow and lack of gas wind is encircleed, clinker
Form is still kept preferably, but NOXConcentration increases, and it is related to judge that reason is turned down with secondary air flow in burner hearth hogging and lack of gas wind, tastes
Upper secondary air flow and lack of gas air quantity are encircleed in configuration again for examination adjustment next time.
Table three:
In table three, unit at full capacity under, carry out the 11st to 14 time adjustment, wherein constantly reduce arch wall secondary air register
One, the aperture of arch wall secondary air register two and F layers of vertical wall secondary air register reduces the air quantity of lower furnace, NOXDischarge is gradually dropped
It is low, but the coke button of molten condition increased significantly in clinker, and there is overheating problem in water-cooling wall, and flame kernel moves up, and shields import cigarette
It is more than specified value that temperature, which rises about 100 DEG C, unfavorable to control coking.
By the observation analysis of the data of table one, table two and table three, in the six, the 9th, the tenth adjustment, F layers vertical
Wall secondary air register aperture is 40% or so, and 17% or so, two aperture of arch wall secondary air register exists one aperture of arch wall secondary air register
50% or so, 25% or so, boiler coke is relieved the aperture of lack of gas secondary air register one and two, but arch wall secondary air register
One and two aperture is larger, makes coal dust undershoot, and F layers of vertical wall secondary air register aperture are big, and coal dust concentrates on arch lower portion burning,
Nox discharge is up to 2100mg/Nm3, and out of stock pressure is larger.Therefore in the six, the 9th, the tenth adjustment, adjustment emphasis is
Reduce NOXDischarge.The aperture of F layers of vertical wall secondary air register, arch wall secondary air register one and two is turned down, while by lack of gas Secondary Air
Door one and the aperture of lack of gas secondary air register two tune up on an equal basis, are all 30~60%, the aperture of center OFA secondary air register tune up for
75-85% sprays suitable Secondary Air entrainment portions coal dust from lack of gas-burnout degree burner centre wind snout, is not only encircleing
Portion's upper area furnace water cooling wall surface forms oxidizing atmosphere, promotes burning, and reduce burnout degree region oxygen amount and
Fire box temperature thereby inhibits the thermal NO x formed under nitrogen molecular hot conditions in air, generally reduces combustion process
The NOx of middle generation.And will keep circumference OFA secondary air register control aperture is the circumferential air quantity that 15-20% controls burnout degree, makes to encircle
On burnout degree jet stream sprayed from circumferential spout, there is stronger burner hearth penetration capacity, and can roll up the flue gas that flows up of suction simultaneously
Be sufficiently mixed therewith, provide staged air distribution for the later period after-flame and low NOx drainage of carbon particle, thus realize reduce NOx emission and
Clinker coking is reduced, and clinker form is normal, does not have molten coke button, also without coke buttons such as hard burnt, big cokes, illustrates that burning is filled
Point, it increases economic efficiency.Referring to embodiment 1-6 and table four as a result, to enable those skilled in the art's refer to the instruction text
It can implement accordingly.
Embodiment 1
When unit load is 450MW, the aperture of F layer vertical wall secondary air register is 25%, lack of gas secondary air register one and weary
The aperture of gas secondary air register two is identical, is all 30%, and the aperture of arch wall secondary air register one is 5%, and arch wall secondary air register two is opened
Degree is 30%, and the differential pressure for controlling secondary air box is 0.3-0.7Kpa, and operation oxygen amount is 5.0-6.0%, center OFA secondary air register
Aperture is 75%, and the aperture of circumference OFA secondary air register is 15%, and milling pipe outlet pressure is 3.0-4.0Kpa, D layers of vertical wall two
The aperture of secondary air door is 5%, the aperture of E layers of vertical wall secondary air register is 7%.
Embodiment 2
When unit load is 500MW, the aperture of F layer vertical wall secondary air register is 30%, lack of gas secondary air register one and weary
The aperture of gas secondary air register two is identical, is all 30%, and the aperture of arch wall secondary air register one is 8%, and arch wall secondary air register two is opened
Degree is 35%, and the differential pressure for controlling secondary air box is 0.5-0.75Kpa, and operation oxygen amount is 5.0-6.0%, center OFA secondary air register
Aperture be 75%, the aperture of circumference OFA secondary air register is 15%, and milling pipe outlet pressure is 3.0-4.5Kpa, D layers of vertical wall
The aperture of secondary air register is 5%, the aperture of E layers of vertical wall secondary air register is 7%.
Embodiment 3
When unit load is 550MW, the aperture of F layer vertical wall secondary air register is 30%, lack of gas secondary air register one and weary
The aperture of gas secondary air register two is identical, is all 30~35%, and the aperture of arch wall secondary air register one is 10%, arch wall secondary air register two
Aperture be 40%, control secondary air box differential pressure be 0.65-0.75Kpa, operation oxygen amount be 4.2-4.8%, center OFA bis- times
The aperture of air door is 75%, and the aperture of circumference OFA secondary air register is 15%, and milling pipe outlet pressure is 3.0-4.5Kpa, and D layers hang down
The aperture of stalk secondary air register is 5%, the aperture of E layers of vertical wall secondary air register is 7%.
Embodiment 4
When unit load is 600MW, the aperture of F layer vertical wall secondary air register is 32%, lack of gas secondary air register one and weary
The aperture of gas secondary air register two is identical, is all 30-35%, and the aperture of arch wall secondary air register one is 12%, arch wall secondary air register two
Aperture be 45%, control secondary air box differential pressure be 0.68-0.78Kpa, operation oxygen amount be 3.8-4.3%, center OFA bis- times
The aperture of air door is 75%, and the aperture of circumference OFA secondary air register is 15%, and milling pipe outlet pressure is 3.5-4.5Kpa, and D layers hang down
The aperture of stalk secondary air register is 5%, the aperture of E layers of vertical wall secondary air register is 7%.
Embodiment 5
When unit load is 630MW, the aperture of F layer vertical wall secondary air register is 33%, lack of gas secondary air register one and weary
The aperture of gas secondary air register two is identical, is all 35-40%, and the aperture of arch wall secondary air register one is 15%, arch wall secondary air register two
Aperture be 50%, control secondary air box differential pressure be 0.68-0.78Kpa, operation oxygen amount be 3.7-4.7%, center OFA bis- times
The aperture of air door is 75%, and the aperture of circumference OFA secondary air register is 15%, and milling pipe outlet pressure is 3.0-4.5Kpa, and D layers hang down
The aperture of stalk secondary air register is 5%, the aperture of E layers of vertical wall secondary air register is 7%.
Embodiment 6
When unit load is 670MW, the aperture of F layer vertical wall secondary air register is 35%, lack of gas secondary air register one and weary
The aperture of gas secondary air register two is identical, is all 35-40%, and the aperture of arch wall secondary air register one is 15%, arch wall secondary air register two
Aperture be 50%, control secondary air box differential pressure be 0.78-0.88Kpa, operation oxygen amount be 3.5-4.5%, center OFA bis- times
The aperture of air door is 85%, and the aperture of circumference OFA secondary air register is 15%, and milling pipe outlet pressure is 3.0-4.8Kpa, and D layers hang down
The aperture of stalk secondary air register is 5%, the aperture of E layers of vertical wall secondary air register is 7%.
Table four:
For the mixed coal of conventional anthracite and indigenous coal, part of the coal particle size greater than 90 μm accounts for the coal dust that the present invention uses
The 18~25% of coal dust total amount, raw material is easy to get, using composition and the characteristic such as following table five of coal:
Table five:
Coal-fired composition and characteristic
| Project | Symbol | Unit | Check coal |
| 1. Industrial Analysis | |||
| As-received total moisture | Mt | % | 7.0 |
| As-received ash | Aar | % | 31.1 |
| It is air-dried ash free basis fugitive constituent | Vdaf | % | 12 |
| Net calorific value as received basis | Qnet.v.ar | kJ/kg | 19653 |
| Full sulfur | St.ar | % | 5.10 |
| 2. elemental analysis | |||
| As-received carbon | Car | % | 51.0 |
| As-received hydrogen | Har | % | 2.4 |
| As-received oxygen | Oar | % | 2.2 |
| As-received nitrogen | Nar | % | 1.2 |
| 3. ash fusibility temperature | |||
| Grey deformation temperature | DT(T1) | ℃ | 1289 |
| Grey softening temperature | ST(T2) | ℃ | 1421 |
| Grey hemispherical fusion temperature | HT | ℃ | 1450 |
| Ash fusibility temperature | FT(T3) | ℃ | 1491 |
Although the embodiments of the present invention have been disclosed as above, but its is not only in the description and the implementation listed
With it can be fully applied to various fields suitable for the present invention, for those skilled in the art, can be easily
Realize other modification, therefore without departing from the general concept defined in the claims and the equivalent scope, the present invention is simultaneously unlimited
In specific details and legend shown and described herein.
Claims (7)
1. reducing the optimization air distribution method of W type flame furnace NOx emission and clinker coking, which is characterized in that including following aspect:
1) it is 6-8% that the aperture of D layers of vertical wall secondary air register, which is the aperture of 4-6%, E layers of vertical wall secondary air register,；
2) according to unit load, the aperture of F layers of vertical wall secondary air register is 20~35%, and lack of gas secondary air register one and lack of gas are secondary
The aperture of air door two is identical, is all 30~60%, and the aperture of arch wall secondary air register one is 5~15%, arch wall secondary air register two
Aperture is 30~60%；
3) differential pressure for controlling secondary air box is 0.3-0.88Kpa, and operation oxygen amount is 3.5-6.0%, the higher control two of unit load
The differential pressure of secondary bellows is higher, and unit load is higher, and control operation oxygen amount is lower；Wherein, the differential pressure of secondary air box be secondary air box with
Differential pressure between furnace pressure；
4) aperture of control centre OFA secondary air register is 75-85%, and the aperture of circumference OFA secondary air register is 15-20%；
5) control milling pipe outlet pressure is 2.6-4.8Kpa.
2. the optimization air distribution method according to claim 1 for reducing W type flame furnace NOx emission and clinker coking, feature
It is, when the unit load is 450MW, the aperture of F layers of vertical wall secondary air register is 25%, lack of gas secondary air register one and lack of gas
The aperture of secondary air register two is identical, is all 30%, and the aperture of arch wall secondary air register one is 5%, the aperture of arch wall secondary air register two
It is 30%, the differential pressure for controlling secondary air box is 0.3-0.7Kpa, and operation oxygen amount is 5.0-6.0%, and center OFA secondary air register is opened
Degree is 75%, and the aperture of circumference OFA secondary air register is 15%, and milling pipe outlet pressure is 3.0-4.0Kpa, and D layers of vertical wall are secondary
The aperture of air door is 5%, the aperture of E layers of vertical wall secondary air register is 7%.
3. the optimization air distribution method according to claim 1 for reducing W type flame furnace NOx emission and clinker coking, feature
It is, when the unit load is 500MW, the aperture of F layers of vertical wall secondary air register is 30%, lack of gas secondary air register one and lack of gas
The aperture of secondary air register two is identical, is all 30%, and the aperture of arch wall secondary air register one is 8%, the aperture of arch wall secondary air register two
It is 35%, the differential pressure for controlling secondary air box is 0.5-0.75Kpa, and operation oxygen amount is 5.0-6.0%, center OFA secondary air register
Aperture is 75%, and the aperture of circumference OFA secondary air register is 15%, and milling pipe outlet pressure is 3.0-4.5Kpa, D layers of vertical wall two
The aperture of secondary air door is 5%, the aperture of E layers of vertical wall secondary air register is 7%.
4. the optimization air distribution method according to claim 1 for reducing W type flame furnace NOx emission and clinker coking, feature
It is, when the unit load is 550MW, the aperture of F layers of vertical wall secondary air register is 30%, lack of gas secondary air register one and lack of gas
The aperture of secondary air register two is identical, is all 30~35%, and the aperture of arch wall secondary air register one is 10%, arch wall secondary air register two
Aperture is 40%, and the differential pressure for controlling secondary air box is 0.65-0.75Kpa, and operation oxygen amount is 4.2-4.8%, center OFA Secondary Air
The aperture of door is 75%, and the aperture of circumference OFA secondary air register is 15%, and milling pipe outlet pressure is 3.0-4.5Kpa, and D layers vertical
The aperture of wall secondary air register is 5%, the aperture of E layers of vertical wall secondary air register is 7%.
5. the optimization air distribution method according to claim 1 for reducing W type flame furnace NOx emission and clinker coking, feature
It is, when the unit load is 600MW, the aperture of F layers of vertical wall secondary air register is 32%, lack of gas secondary air register one and lack of gas
The aperture of secondary air register two is identical, is all 30-35%, and the aperture of arch wall secondary air register one is 12%, arch wall secondary air register two
Aperture is 45%, and the differential pressure for controlling secondary air box is 0.68-0.78Kpa, and operation oxygen amount is 3.8-4.3%, center OFA Secondary Air
The aperture of door is 75%, and the aperture of circumference OFA secondary air register is 15%, and milling pipe outlet pressure is 3.5-4.5Kpa, and D layers vertical
The aperture of wall secondary air register is 5%, the aperture of E layers of vertical wall secondary air register is 7%.
6. the optimization air distribution method according to claim 1 for reducing W type flame furnace NOx emission and clinker coking, feature
It is, when the unit load is 630MW, the aperture of F layers of vertical wall secondary air register is 33%, lack of gas secondary air register one and lack of gas
The aperture of secondary air register two is identical, is all 35-40%, and the aperture of arch wall secondary air register one is 15%, arch wall secondary air register two
Aperture is 50%, and the differential pressure for controlling secondary air box is 0.68-0.78Kpa, and operation oxygen amount is 3.7-4.7%, center OFA Secondary Air
The aperture of door is 75%, and the aperture of circumference OFA secondary air register is 15%, and milling pipe outlet pressure is 3.0-4.5Kpa, and D layers vertical
The aperture of wall secondary air register is 5%, the aperture of E layers of vertical wall secondary air register is 7%.
7. the optimization air distribution method according to claim 1 for reducing W type flame furnace NOx emission and clinker coking, feature
It is, when the unit load is 670MW, the aperture of F layers of vertical wall secondary air register is 35%, lack of gas secondary air register one and lack of gas
The aperture of secondary air register two is identical, is all 35-40%, and the aperture of arch wall secondary air register one is 15%, arch wall secondary air register two
Aperture is 50%, and the differential pressure for controlling secondary air box is 0.78-0.88Kpa, and operation oxygen amount is 3.5-4.5%, center OFA Secondary Air
The aperture of door is 85%, and the aperture of circumference OFA secondary air register is 15%, and milling pipe outlet pressure is 3.0-4.8Kpa, and D layers vertical
The aperture of wall secondary air register is 5%, the aperture of E layers of vertical wall secondary air register is 7%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910250674.XA CN110006034B (en) | 2019-03-29 | 2019-03-29 | Optimized air distribution method for reducing NOx emission and slag coking of W-shaped flame furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910250674.XA CN110006034B (en) | 2019-03-29 | 2019-03-29 | Optimized air distribution method for reducing NOx emission and slag coking of W-shaped flame furnace |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110006034A true CN110006034A (en) | 2019-07-12 |
| CN110006034B CN110006034B (en) | 2020-09-22 |
Family
ID=67169015
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910250674.XA Active CN110006034B (en) | 2019-03-29 | 2019-03-29 | Optimized air distribution method for reducing NOx emission and slag coking of W-shaped flame furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110006034B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111520705A (en) * | 2020-04-08 | 2020-08-11 | 哈尔滨工业大学 | Exhaust gas post-positioned W-flame boiler with arch-mounted secondary air nozzles and air distribution method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0819885A2 (en) * | 1996-07-18 | 1998-01-21 | Toyota Jidosha Kabushiki Kaisha | Combustion apparatus |
| CN101545639A (en) * | 2009-05-08 | 2009-09-30 | 哈尔滨工业大学 | Method for adjusting combustion of W flame furnace by changing quantity of oil secondary air |
| CN107355807A (en) * | 2016-06-02 | 2017-11-17 | 中国大唐集团科学技术研究院有限公司 | W type flame boiler air distribution mode optimization methods |
-
2019
- 2019-03-29 CN CN201910250674.XA patent/CN110006034B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0819885A2 (en) * | 1996-07-18 | 1998-01-21 | Toyota Jidosha Kabushiki Kaisha | Combustion apparatus |
| CN101545639A (en) * | 2009-05-08 | 2009-09-30 | 哈尔滨工业大学 | Method for adjusting combustion of W flame furnace by changing quantity of oil secondary air |
| CN107355807A (en) * | 2016-06-02 | 2017-11-17 | 中国大唐集团科学技术研究院有限公司 | W type flame boiler air distribution mode optimization methods |
Non-Patent Citations (2)
| Title |
|---|
| 汪华剑: "W型火焰锅炉燃烧检测与优化研究", 《中国博士学位论文全文数据库 工程科技Ⅱ辑》 * |
| 黄新元: "《电站锅炉运行与燃烧调整》", 31 March 2003, 中国电力出版社 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111520705A (en) * | 2020-04-08 | 2020-08-11 | 哈尔滨工业大学 | Exhaust gas post-positioned W-flame boiler with arch-mounted secondary air nozzles and air distribution method |
| CN111520705B (en) * | 2020-04-08 | 2021-07-06 | 哈尔滨工业大学 | Exhaust gas post-positioned W-flame boiler with arch-mounted secondary air nozzles and air distribution method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110006034B (en) | 2020-09-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107559821B (en) | The multiple-pass industrial coal powder boiler of flue gas recirculation and vortex burner overhead | |
| CN105783025A (en) | Method for monitoring distribution of pulverized coal in low-NOx tangential coal-fired boiler | |
| CN105805730B (en) | Realize the circulating fluidized bed boiler systems of low-nitrogen oxide discharging | |
| CN108592015B (en) | Boiler flue gas recirculation system and method thereof | |
| CN104613465A (en) | Cofiring-type biomass fuel boiler | |
| CN100516651C (en) | W flame boiler primary air waste-steam replacement method and apparatus for | |
| CN110006034A (en) | Reduce the optimization air distribution method of W type flame furnace NOx emission and clinker coking | |
| CN204534547U (en) | A kind of mixed combustion type biomass fuel boiler | |
| CN211694854U (en) | W flame boiler low-nitrogen combustion and slagging-proof flue gas recirculation system | |
| CN112902154A (en) | Over-fire air system with controllable steam temperature deviation and CO concentration at two sides of opposed firing boiler | |
| CN108180469B (en) | Method and device for adjusting steam temperature by using burner or powder process exhaust gas | |
| CN204717670U (en) | Boiler staged combustion system of 300MW generator set | |
| WO2013020254A1 (en) | Environmentally friendly energy-saving boiler of circulating fluidized bed type with organic thermal carrier | |
| CN212841544U (en) | Pure-combustion low-calorific-value coal gangue three-stage separation fluidized bed boiler | |
| CN209540869U (en) | A kind of accurate blowing system of pulverized-coal fired boiler | |
| CN207527565U (en) | A kind of circle of contact pulverized coal decoupling combustor group and burner | |
| CN209130922U (en) | The pure high-alkali coal wet bottom boiler low NOx combustion system of combustion | |
| CN207778428U (en) | A kind of desulfuration in furnace device of optimization material returning device operation | |
| CN207350325U (en) | A kind of new step arch W flame boiler furnace structure | |
| CN106122950B (en) | A kind of circulating fluidized bed boiler of low nitrogen burning | |
| CN109578991A (en) | A kind of accurate blowing system of pulverized-coal fired boiler | |
| CN1117947C (en) | Method for making fluid bed produce high-temp. smoke and its equipment | |
| CN206094050U (en) | A air distribution system for CFB flue gas emergence equipment | |
| CN104848243B (en) | A kind of half transporting pulverized coal with exhaust gas method and boiler using intermediate storage-type pulverized coal preparation system | |
| CN214664372U (en) | Over-fire air system for controlling steam temperature deviation and CO concentration of opposed firing boiler |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |