CN107355775B - The more coal fractional combustion policy optimization methods of W flame boiler - Google Patents
The more coal fractional combustion policy optimization methods of W flame boiler Download PDFInfo
- Publication number
- CN107355775B CN107355775B CN201610390809.9A CN201610390809A CN107355775B CN 107355775 B CN107355775 B CN 107355775B CN 201610390809 A CN201610390809 A CN 201610390809A CN 107355775 B CN107355775 B CN 107355775B
- Authority
- CN
- China
- Prior art keywords
- coal
- boiler
- pulverizer
- coal pulverizer
- burner
- 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.)
- Active
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
- F23C5/00—Disposition of burners with respect to the combustion chamber or to one another; Mounting of burners in combustion apparatus
- F23C5/08—Disposition of burners
-
- 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
- F23M—CASINGS, LININGS, WALLS OR DOORS SPECIALLY ADAPTED FOR COMBUSTION CHAMBERS, e.g. FIREBRIDGES; DEVICES FOR DEFLECTING AIR, FLAMES OR COMBUSTION PRODUCTS IN COMBUSTION CHAMBERS; SAFETY ARRANGEMENTS SPECIALLY ADAPTED FOR COMBUSTION APPARATUS; DETAILS OF COMBUSTION CHAMBERS, NOT OTHERWISE PROVIDED FOR
- F23M5/00—Casings; Linings; Walls
- F23M5/08—Cooling thereof; Tube walls
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combustion Of Fluid Fuel (AREA)
Abstract
The present invention relates to a kind of more coal fractional combustion policy optimization methods of W flame boiler, when including: coal blend ratio, coal pulverizer coal powder injection mode situation of the fuel in boiler for best boiler fractional combustion, under different load, in the operation conditions of different F layer Secondary Air tilt angled downs, F wind tilt angled down and D, E wind aperture are determined.Wherein, most preferably the coal blend ratio of boiler fractional combustion, coal pulverizer coal powder injection mode determination method include: the combustion strategies of predetermined boiler, it is carried out according to scheduled combustion strategies, boiler oil combustion simulation, obtain the operating condition of boiler, when to using different combustion strategies, boiler working condition is compared analysis, obtains coal blend ratio, the coal pulverizer coal powder injection mode of optimal boiler fractional combustion.The present invention, it is ensured that first order fuel and second level full combustion of fuel.
Description
Technical field
The present invention relates to a kind of more coal fractional combustion policy optimization methods of W flame boiler.
Background technique
W type flame boiler is developed by U-shaped combustion technology, is initiated by FW company, the U.S., by French Stein company
Continuously improved with Japanese HIT.FW company etc. perfect, this anthracite etc. that uses is difficult to burn the combustion technology of coal, exists
Promotion and application in global range.This boiler combustion mode and tangential firing mode are significantly different, and combustion chamber is divided into two
Point, the combustion chamber of secondary furnace and lower part including top, the width of combustion chamber is bigger than secondary furnace by 80%~120%, and lower part is fired
It burns room and is laid with a certain number of unburned bands, the top of front nose constitutes donor, and the general tilt angle of chimney arch is 15 ° and arrives
30 °, burner is then arranged on the arch of forward and backward wall, and Secondary Air air port is distributed on the front-back wall of lower hearth, and breeze airflow is by furnace
It is sprayed on arch to lower hearth, and ignition, encircles lower Secondary Air and almost or mutually hang down after stokehold, furnace with the flame of wind powder air-flow
Straight direction, which is classified, to be added, and formation W type flame in rear steering is converged.
The critical control point of W type flame boiler grading combustion technology is: how to control the ratio of coal, is conducive in furnace
The full combustion of different types of coal;How to guarantee that furnace internal classification burns, reduce furnace flame central temperature, it is raw to reduce thermal NO x
At content.
In view of the above shortcomings, the designer is actively subject to research and innovation, to found a kind of more coals of W flame boiler
Fractional combustion policy optimization method makes it with more the utility value in industry.
Summary of the invention
In order to solve the above technical problems, the object of the present invention is to provide one kind to ensure that first order fuel and second level fuel fill
Divided combustion, the more coal fractional combustion policy optimization methods of W flame boiler.
The more coal fractional combustion policy optimization methods of W flame boiler of the present invention, comprising:
When fuel in boiler is the coal blend ratio of best boiler fractional combustion, coal pulverizer coal powder injection mode situation, not
With under load, in the operation conditions of different F layer Secondary Air tilt angled downs, wherein the operation conditions includes at least: saving coal
NOx, CO, O2 of device exiting flue gas;NOx, CO, O2 of air preheater exiting flue gas;Boiler thermal efficiency;As-fired coal industry, element point
Analysis;Flying dust, clinker sampling analysis;Economizer exit flue-gas temperature;Air preheater exit gas temperature;Raw coal sampling;Environment temperature,
Humidity and atmospheric pressure;
The operation conditions of the boiler of acquisition is analyzed, determines F wind tilt angled down and D, E wind aperture are as follows:
Wall afterwards: burner D1, burner A1, burner D2, burner combustion device A2, burner are respectively corresponded from left to right
The F wind angle of declination of D3, burner A3, burner D4, burner A4, burner D5, burner A5, burner D6, burner A6
Degree: 25,25,5,5,30,30,30,30,5,5,25,25;E wind aperture: 25,25,5,20,20,20,20,20,5,5,10,10;D
Wind aperture: 5,5,5,5,5,5,5,5,5,5,5,5;
Front wall: burner C1, burner B1, burner C2, burner B2, burner C3, combustion are respectively corresponded from left to right
The F wind tilt angled down of burner B3, burner C4, burner B4, burner C5, burner B5, burner C6, burner B6: 25,
25,5,5,30,30,30,30,5,5,25,25;E wind aperture: 25,25,5,20,20,20,20,20,5,5,10,10;D wind is opened
Degree: 5,5,5,5,5,5,5,5,5,5,5,5;
Wherein, the fuel in boiler is the determination side of the coal blend ratio of best boiler fractional combustion, coal pulverizer coal powder injection mode
Method includes:
Several coals are chosen, coal elements and Industrial Analysis are carried out to the coal of selection based on thermogravimetric and infrared analysis;
Based on the coal elements and Industrial Analysis as a result, the combustion strategies of predetermined boiler, the combustion strategies are specific
Include: (1) can be formed in boiler fractional combustion coal allocation ratio and corresponding coal pulverizer coal-grinding mode;(2) no
Can be formed in boiler classification coal allocation ratio and corresponding coal pulverizer coal-grinding mode;Wherein, point of the boiler
Grade burning specifically: reacted using inflammable briquette with oxygen, become first-stage burning, wherein inflammable briquette is bituminous coal or bituminous coal and meager coal
Mixing;The high-temperature flue gas atmosphere that first stage is formed, under the sweeping along of high-temperature flue gas, ignite anthracite, forms second level combustion
It burns;
It is carried out according to scheduled combustion strategies, boiler oil combustion simulation obtains the operating condition of boiler, and the boiler working condition is extremely
Few includes heat temperature, hot temperature, spray water flux, exhaust gas temperature, unburned carbon in flue dust, boiler slag carbon content, low heat valve, row again again
Cigarette loss, empty pre- entrance oxygen amount, Mechanical adsorption, back balance furnace effect, back balance power supply mark coal, SCR inlet NOx
Content;
When to using different combustion strategies, boiler working condition is compared analysis, obtains the coal of optimal boiler fractional combustion
Kind proportion, coal pulverizer coal powder injection mode.
Further, under the predetermined load, the case where different F wind tilt angled down, is specifically included: (1) in 325MW
Under load, boiler operating state under 0 ゜ of F wind tilt angled down, 10 ゜, 15 ゜, 20 ゜, 30 ゜;(2) under 300MW load, F wind angle of declination
Spend boiler operating state under 5 ゜, 10 ゜, 20 ゜, 30 ゜;(3) under 260MW load, 5 ゜ of F wind tilt angled down, 10 ゜, 20 ゜, 30 ゜ cook
Furnace operation conditions.
It further, further include that SOFA spout is equipped on arch, front-back wall each four, wherein three or three liquidate, on the right side of front wall
It is arranged with the mode that a spout is respectively set on the left of rear wall.
Further, NOx, CO, O2 measurement of economizer exit flue gas use gridding method, and every side flue takes five measuring points,
Each flue is mixed into a flue gas sample and is analyzed, and every side air preheater exiting flue gas ingredient takes the arithmetic mean of instantaneous value of flue, pot
Fire grate cigarette smoke components take the arithmetic mean of instantaneous value of 2 flues;
NOx, CO, O2 measurement of air preheater exiting flue gas equally use gridding method, and every side flue takes five measuring points, Mei Geyan
Road is mixed into a flue gas sample and is analyzed, and every side air preheater exiting flue gas ingredient takes the arithmetic mean of instantaneous value of flue, boiler exhaust gas
Smoke components take the arithmetic mean of instantaneous value of 2 flues;
Economizer exit flue-gas temperature uses grid survey, and the arithmetic average per each measurement point side-draw is average as outlet
Flue-gas temperature;
The measurement of air preheater exit gas temperature uses gridding method, totally 2 flues, and every side air preheater exports average flue-gas temperature
Take the arithmetic mean of instantaneous value of measurement point.
Further, the combustion strategies of the predetermined boiler, specifically include:
The W type flame boiler configures four coal pulverizers, the first coal pulverizer A, the second coal pulverizer B, third coal pulverizer C,
4th coal pulverizer D;
One: the first coal pulverizer A of strategy, the second coal pulverizer B, third coal pulverizer C, the 4th coal pulverizer D grind pure burning anthracite;
Two: the first coal pulverizer A of strategy, the second coal pulverizer B, third coal pulverizer C, the 4th coal pulverizer D grind bituminous coal, smokeless
The Mixture Density Networks of coal, grind bituminous coal: anthracite is mixed according to 1:3 ratio matches;
Three: the four coal pulverizer D of strategy grind pure bituminous coal, and single coal volatile matter is limited within 20%~30%, the first mill
Coal machine A, the second coal pulverizer B, third coal pulverizer C grind anthracite, and single coal volatile matter is limited in 15% or less;
Four: the first coal pulverizer A of strategy, the second coal pulverizer B, third coal pulverizer C, the 4th coal pulverizer D grind bituminous coal, smokeless
The Mixture Density Networks of coal, grind bituminous coal: anthracite is mixed according to 1:1 ratio matches, stokehold premix;
Strategy five: bituminous coal and anthracite ratio are 1:1, bituminous coal on the first coal pulverizer, third coal pulverizer, and single coal is volatilized
Divide and be limited within 20%~30%, the second coal pulverizer, the 4th coal pulverizer grind upper anthracite, i.e., forward and backward wall respectively has a coal-grinding
Pure bituminous coal on machine, bituminous coal and anthracite ratio are 1:1;
Strategy six: the first coal pulverizer A, third coal pulverizer C grind bituminous coal, anthracitic Mixture Density Networks, grind bituminous coal: anthracite according to
7 ︰, 3 ratio mix matching, the second coal pulverizer B, the 4th coal pulverizer D grind bituminous coal, anthracitic Mixture Density Networks, bituminous coal: anthracite according to
3 ︰, 7 ratio mix matching;
Seven: the first coal pulverizer A of strategy, the second coal pulverizer B, third coal pulverizer C, on the 4th coal pulverizer D bituminous coal grind bituminous coal,
Anthracite Mixture Density Networks, bituminous coal: anthracite is mixed according to 3 ︰, 1 ratio matches;
Tactful eight: the four coal pulverizer D anthracites, single coal volatile matter are limited in 15% hereinafter, the first coal pulverizer A, the
Two coal pulverizer B, third coal pulverizer C grind bituminous coal, and single coal volatile matter is limited within 20%~30%, and bituminous coal: anthracite is pressed
It mixes and matches according to 3 ︰, 1 ratio;
Nine: the first coal pulverizer A of strategy, the second coal pulverizer B, third coal pulverizer C, the 4th coal pulverizer D grind mill bituminous coal, poor
The Mixture Density Networks of coal, Yan Mei ︰ meager coal is mixed according to 7 ︰, 3 ratio matches;
Ten: the first coal pulverizer A of strategy, the second coal pulverizer B, third coal pulverizer C, the 4th coal pulverizer D grind mill bituminous coal, poor
The Mixture Density Networks of coal, Yan Mei ︰ meager coal is mixed according to 3 ︰, 7 ratio matches;
The 11: the first coal pulverizer A of strategy, the second coal pulverizer B, third coal pulverizer C, bituminous coal grinds mill on the 4th coal pulverizer D
Coal anthracite, meager coal, bituminous coal Mixture Density Networks, coal-grinding mixes and matches Wu Yan Mei ︰ Pin Mei ︰ bituminous coal=2 ︰, 4 ︰, 4 ratio;
Wherein, strategy two to six, strategy eight, strategy 11 are the coal allocation ratio that fractional combustion can be formed in boiler
And corresponding coal pulverizer coal-grinding mode;
Strategy one, strategy one, seven, nine, ten are that the coal allocation ratio of classification and corresponding cannot be formed in boiler
Coal pulverizer coal-grinding mode.
Further, in strategy five, when boiler combustion, the first coal pulverizer A, third coal pulverizer C disintegrating outlet temperature be 118
DEG C, the disintegrating outlet temperature of third coal pulverizer is 109 DEG C;
It is preferential to start the first coal pulverizer, three the second coal pulverizer, third coal pulverizer coal-grindings when boiler combustion in strategy eight
Machine, opening mill sequence is ipsilateral, pre-cooling primary air fan, it is desirable that volatile matter is 30%, calorific value 20000kJ/kg or more.
Further, including aileron longitudinally opens 4 ventilation gaps and inwardly blows Secondary Air, water screen tube outer diameter at aileron
120.65mm, center are 25.4mm, aileron upper and lower part tube outer diameter away from the pipe gap for 146.4mm, water screen tube
69.85mm, water screen tube and aileron upper and lower part pipe are connected by reducer pipe, the water-cooling wall at four ventilation strips of ventilation
The outer diameter of pipe is less than 120.65mm, and the pipe gap of the water screen tube at four ventilation strips of ventilation is 76.55mm, ventilation strip
Height is set as the total length of aileron pipe, or is arranged in aileron top half;Combustion is defended in removal each 1 root canal in ventilation slot two sides
Band.
Further, racemization pull rod is placed in extreme lower position.
Further, the volatile matter content of inflammable coal is higher than anthracite, and volatile matter > 25%, bituminous coal, anthracitic
Proportion is 3:1.
Further, under 335MW load, air output is controlled in 241m3/ s runs 1.83% or more oxygen amount;In 300MW
Under load, air output is controlled in 222m3/ s runs 2.58% or more oxygen amount.
According to the above aspect of the present invention, the present invention has at least the following advantages:
The present invention makes full use of two-stage combustion technology, it is ensured that first order fuel and second level full combustion of fuel effectively prolong
Long flame travel and the whole flame combustion distance of raising, are effectively reduced boiler flyash carbon content, improve boiler efficiency, promote boiler
The ability of underrun improves boiler milling system power output.
The above description is merely an outline of the technical solution of the present invention, in order to better understand technology hand of the invention
Section, and can be implemented in accordance with the contents of the specification, and with presently preferred embodiments of the present invention and attached drawing be cooperated to be described in detail such as below
Afterwards.
Detailed description of the invention
The position schematic diagram for the wall with refractory lining, refracto laying that Fig. 1 is;
Fig. 2 is that the present invention increases the anti-scorch wind prioritization scheme schematic diagram of aileron;
Fig. 3 is W flame boiler combustion mechanism figure;
Fig. 4 is W type flame boiler schematic diagram;
Burner arrangement schematic diagram on Fig. 5 chimney arch of the present invention;
Fig. 6 Secondary Air of the present invention has a down dip device overall structure main view sectional view;
Fig. 7 present invention encircles lower Secondary Air inclination angle pendulous device structural schematic diagram;
The A-A cross-sectional view of the independent air compartment of Fig. 8 present invention;
Fig. 9 present invention adjusts the scheme of installation of blade, regulating arm and rotation axis;
The connection schematic diagram of Figure 10 pull rod of the present invention, cursor, regulating arm and connecting rod;
Figure 11 is to encircle lower overfire air port arrangement schematic diagram;
Figure 12 is anthracite figure compared with bituminous coal different proportion zero-g aircraft;
Figure 13 is different coal quality maximum weightless temperature tendency charts;
Burner 1, partition 2 first adjust blade 3, lower secondary air chamber 4, connecting rod 5, pull rod 6, uniform flow orifice 7, regulating arm 8,
Cursor 9, post-tensioning water screen tube 10, vertical water screen tube 11, burner hearth 12, the first midfeather 13, lateral partitions 14, the second mediastinum
Plate 15, second adjusts blade 16, third midfeather 17, the 4th midfeather 18, rotation axis 19, layback water screen tube 20, wide seam wind
Room 21, narrow slit air compartment 22, pin hole 24, sliding groove 25.
Specific embodiment
With reference to the accompanying drawings and examples, specific embodiments of the present invention will be described in further detail.Implement below
Example is not intended to limit the scope of the invention for illustrating the present invention.
As shown in Fig. 3 to 13, W flame boiler technical characteristics are that Double Cyclone Burner combination goes with each other all the time just
Straightening blows powder system.Double Cyclone Burner is vertically disposed on arch, it is mainly separated by coal dust input pipe, grid
The components such as device, bispin air duct, thin powdered coal gas flow tube, racemization blade composition.Breeze airflow is by coal dust input pipe, via lattice
Grid separator is divided evenly into two parts, into two cyclone cylinders.In each cyclone cylinder, due to the effect of inertial separation, shape
At deep or light two strands of breeze airflows, enter burner hearth straight down via cyclone cylinder spout and the outlet of thin powdered coal gas flow tube respectively.It is secondary
Wind, which is divided into, encircles the lower two parts of upper and arch.Secondary Air accounts for about the 30% of Secondary Air total amount on arch, and annular is formed beside deep or light air-flow
Secondary Air sprays into burner hearth.Encircle lower Secondary Air and account for about the 70% of Secondary Air total amount, is sprayed by the clearance type formed between vertical water-cooling wall
Mouth divides three-level to feed burner hearth.Its structure is as shown in Figure 2.
At furnace height about 1/3, front wall and rear wall are inwardly formed chimney arch, and 2 × 12 cyclone burnings are disposed on arch
Device, wherein front wall is followed successively by burner C1, burner B1, burner C2, burner B2, burner C3, burner from left to right
B3, burner C4, burner B4, burner C5, burner B5, burner C6, burner B6;Wall is followed successively by combustion from left to right afterwards
Burner D1, burner A1, burner D2, burner combustion device A2, burner D3, burner A3, burner D4, burner A4,
Burner D5, burner A5, burner D6, burner A6.
The present invention, which has, encircles the device that lower Secondary Air can be swung with inclination angle, it can solve Secondary Air under coal varitation rear arch and incline
Rake angle can not be adjusted, and fail to enter burner hearth by guide vane tilt angle, it is difficult to the problem of improving coal dust burn-off rate.Including
Pull rod, adjusts blade, midfeather at regulating arm.
It is provided with secondary air chamber on lower hearth front-back wall, the upper secondary air chamber of arch is divided by partition and encircles lower secondary air chamber.
Independent secondary air chamber, front-back wall are separated to form with longitudinal baffle according to the position of burner and quantity in secondary air chamber under arch
Each 12 independent air compartments.
In the independent air compartment of corresponding each burner, wherein front wall is followed successively by burner C1, burner B1, combustion from left to right
Burner C2, burner B2, burner C3, burner B3, burner C4, burner B4, burner C5, burner B5, burner
C6, burner B6;Wall is followed successively by burner D1, burner A1, burner D2, burner combustion device A2, burning from left to right afterwards
Device D3, burner A3, burner D4, burner A4, burner D5, burner A5, burner D6, burner A6;
In the independent air compartment of corresponding each burner, formed between post-tensioning water screen tube and two neighboring vertical water screen tube
Rectangle spout.Eight pieces of adjusting blades are set along furnace height direction in each air compartment, adjust blade installation on the rotating shaft.
Every piece of adjusting middle part of blade position is connected with rotation axis 19.In sustained height, the same independent indoor rotation axis of wind
Across the first, second, third, fourth midfeather, blade connection will be adjusted in each air compartment, is mounted in air compartment by rotation axis,
Then there are eight rotation axis along furnace height direction in each air compartment.Affixed regulating arm 8 in every rotation axis 19, regulating arm 8 are logical
It crosses hinge to be connected with connecting rod 5, eight rotation axis 19 is connected.Cursor 9 is installed in a rotation axis 19 wherein,
Connecting rod 6 on cursor 9.It is connected by a hinge between pull rod 6 and cursor 9, the position hinged with pull rod 6 of cursor 9 is set
It is equipped with sliding groove 25, the position that 6 end of pull rod is connect with cursor 9 is provided with pin hole 24.
When the practical burning coal of boiler deviates design value, lower Secondary Air tilt angle is encircleed according to the adjustment of different coals quality.
By the way that setting adjusts blade tilt pendulous device in secondary air chamber under W type flame furnace arch, adjusts and encircle lower Secondary Air
Into the wind direction of burner hearth.When the practical burning coal of boiler deviates design value, can be determined according to different coals quality secondary under best arch
Wind tilt angle can obtain high Combustion Efficiency of Coal Powder, at the same can prevent again because tilt angled down it is excessive caused by flame impingement
Dry bottom hopper, to cause the Serious Slagging of burner hearth.Encircle lower Secondary Air and enter burner hearth under suitable tilt angle, fire can be extended
Flame stroke, lower hearth flame degree of filling are reinforced, and the after-flame effect of coal dust can be improved.
Cyclone formula burner is by a glazing bar distributor box, two cyclone cylinders, two main burning spouts, two lack of gas gears
Plate, two lack of gas spouts and corresponding pipeline composition.After First air wind powder mixture enters glazing bar distributor box by pipeline, it is divided into
Two strands of equal jet streams enter in two cyclone cylinders along a tangential direction respectively, and fuel is separated under the action of the centrifugal force, coal
Vent damper adjustment of the powder concentration by dress ground in blast pipe, spin intensity pass through the racemization blade tune in main burner
It is whole.Water-cooling wall vertical wall wind under combustion-supporting secondary air separating from ring header is vault wind and encircles.Vault wind is divided into three strands again:
One with the concentric spout of lack of gas spout by being sent into furnace (A), and another stock is by being sent into furnace with the concentric spout of main burner
Interior (B), there are also one to be used to combustion-assistant ignition with oil gun (C).Encircle lower Secondary Air be divided into again in vertical direction (D), in (E),
Under three strands of (F).G baffle is control aileron anti-coking wind.The flow of each stock Secondary Air can be adjusted with baffle.Upper furnace
Arrange pendant superheater, furnace arch, furnace nose top and lobby are disposed with high temperature superheater, high temperature reheater, and reheat steam temperature is kept off using flue gas
Plate is adjusted.Every furnace air and flue system equipped with two trisector air heaters, two Rotar Blade-Adjustable Axial Forced Draft Fans,
Two adjusting rotor blade axial-flow type air-introduced machines;Secondary Air use air stage feeding mode, by burner hearth encircle on go in ring secondary air box in
Different baffles (A, B, C, D, E, F) control air quantity.
Embodiment 1
The more coal fractional combustion policy optimization methods of the present embodiment W flame boiler determine F wind tilt angled down F wind angle of declination
It the step of degree and D, E wind aperture, specifically includes:
Boiler in following (1), (2), (3) 3 kinds of loads and F wind tilt angled down, is fired respectively using fuel staging
Burning mode is burnt, and the operation conditions in different F layer Secondary Air tilt angled downs is obtained, wherein the operation conditions is at least
It include: NOx, CO, O2 of economizer exit flue gas;NOx, CO, O2 of air preheater exiting flue gas;Boiler thermal efficiency;As-fired coal work
Industry, elemental analysis;Flying dust, clinker sampling analysis;Economizer exit flue-gas temperature;Air preheater exit gas temperature;Raw coal sampling;
Environment temperature, humidity and atmospheric pressure;
Wherein, (1) under 325MW load, boiler operating state under 0 ゜ of F wind tilt angled down, 10 ゜, 15 ゜, 20 ゜, 30 ゜;(2)
Under 300MW load, boiler operating state under 5 ゜ of F wind tilt angled down, 10 ゜, 20 ゜, 30 ゜;(3) under 260MW load, under F wind
Boiler operating state under 5 ゜ of degree of tilt, 10 ゜, 20 ゜, 30 ゜;
The operation conditions of the boiler of acquisition is analyzed, determines F wind tilt angled down and D, E wind aperture are as follows:
F wind tilt angled down and D, E wind aperture are as follows:
Wall afterwards: burner D1, burner A1, burner D2, burner combustion device A2, burner are respectively corresponded from left to right
The F wind angle of declination of D3, burner A3, burner D4, burner A4, burner D5, burner A5, burner D6, burner A6
Degree: 25,25,5,5,30,30,30,30,5,5,25,25;E wind aperture: 25,25,5,20,20,20,20,20,5,5,10,10;D
Wind aperture: 5,5,5,5,5,5,5,5,5,5,5,5;
Front wall: burner C1, burner B1, burner C2, burner B2, burner C3, combustion are respectively corresponded from left to right
The F wind tilt angled down of burner B3, burner C4, burner B4, burner C5, burner B5, burner C6, burner B6: 25,
25,5,5,30,30,30,30,5,5,25,25;E wind aperture: 25,25,5,20,20,20,20,20,5,5,10,10;D wind is opened
Degree: 5,5,5,5,5,5,5,5,5,5,5,5.
In the present embodiment, SOFA spout is equipped on arch, front-back wall each four, wherein three or three liquidate, front wall right side is with after
The mode that a spout is respectively set on the left of wall is arranged.
In the present embodiment, NOx, CO, O2 measurement of economizer exit flue gas use gridding method, and every side flue takes five surveys
Point, each flue are mixed into a flue gas sample and are analyzed, and every side air preheater exiting flue gas ingredient takes the arithmetic mean of instantaneous value of flue,
Boiler discharging flue gas ingredient takes the arithmetic mean of instantaneous value of 2 flues;
NOx, CO, O2 measurement of air preheater exiting flue gas equally use gridding method, and every side flue takes five measuring points, Mei Geyan
Road is mixed into a flue gas sample and is analyzed, and every side air preheater exiting flue gas ingredient takes the arithmetic mean of instantaneous value of flue, boiler exhaust gas
Smoke components take the arithmetic mean of instantaneous value of 2 flues;
Economizer exit flue-gas temperature uses grid survey, and the arithmetic average per each measurement point side-draw is average as outlet
Flue-gas temperature;
The measurement of air preheater exit gas temperature uses gridding method, totally 2 flues, and every side air preheater exports average flue-gas temperature
Take the arithmetic mean of instantaneous value of measurement point.
In the various embodiments described above, boiler thermal efficiency calculation formula is as follows:
In formula:
ηg--- boiler thermal efficiency, %;
Hf--- fuel applications base low heat valve, kJ/kg;
B --- corresponding every kilogram enters the total input physical thermal of furnace fuel, kJ/kg;
Every kilogram of L --- boiler enters the total heat loss of furnace fuel, is calculated as follows according to this boiler situation:
L=LUC+L'G+Lmf+LH+LMA+Lco+Lβ+LUN
LUCUncompleted burned carbon heat loss, kJ/kg in-lime-ash;
L'G- dry gas loss, kJ/kg;
Lmf- enter heat loss caused by moisture, kJ/kg in furnace fuel;
LH- hydrogen burning generates heat loss caused by moisture, kJ/kg;
LMAHeat loss caused by-moisture in air, kJ/kg;
LCO- as generate carbon monoxide and caused by heat loss, kJ/kg;
LβThe heat loss of-surface emissivity and convection current, kJ/kg;
LUN- immeasurability heat loss (takes constant by boiler factory's design value), kJ/kg.
The specific verification process of the present embodiment is as follows: this time test is divided into two stages completions.
First stage tests boiler under different coals and load, and boiler is under different F layer Secondary Air tilt angled downs
Operation conditions, understand its combustion case under different operating conditions, determine optimal F layers of Secondary Air tilt angled down, it is specific to test
Content is shown in Table 1;Second stage, boiler reheater there are more serious overheating problem, by F wind have a down dip baffle adjustment and
Under different air distribution modes, alleviate overheating problem.
Test method
1) NOx, CO, O2 measurement of economizer exit flue gas
NOx, CO, O2 measurement of economizer exit flue gas use gridding method, and every side flue takes five measuring points, and each flue is mixed
A flue gas sample is synthesized to be analyzed.Every side air preheater exiting flue gas ingredient takes the arithmetic mean of instantaneous value of flue, boiler discharging flue gas
Ingredient takes the arithmetic mean of instantaneous value of 2 flues.Part load test is carried out since test needs to also use single-point method.
Measuring instrument is the Testo 350-Pro flue gas analyzer of German import, to stable conditions half an hour with top
Just measure.
2) NOx, CO, O2 measurement of air preheater exiting flue gas
NOx, CO, O2 measurement of air preheater exiting flue gas equally use gridding method, and every side flue takes five measuring points, Mei Geyan
Road is mixed into a flue gas sample and is analyzed.Every side air preheater exiting flue gas ingredient takes the arithmetic mean of instantaneous value of flue, boiler exhaust gas
Smoke components take the arithmetic mean of instantaneous value of 2 flues.Part load test is carried out since test needs to also use single-point method.
Measuring instrument is the Testo 350-Pro flue gas analyzer of German import, to stable conditions half an hour with top
Just measure.
3) economizer exit smoke temperature measurement
Economizer exit flue-gas temperature uses grid survey, and the arithmetic average per each measurement point side-draw is average as outlet
Flue-gas temperature.
It is that E type power plant is even that exit gas temperature, which measures primary instrument, and secondary meter is FLUKE temperature measuring set.
4) air preheater exit gas temperature measures
The measurement of air preheater exit gas temperature uses gridding method, totally 2 flues.Every side air preheater exports average flue-gas temperature
Take the arithmetic mean of instantaneous value of measurement point.
It is that E type power plant is even that exit gas temperature, which measures primary instrument, and secondary meter is FLUKE data collection system.
5) raw coal sampling
Raw coal is obtained from belt layer, is sampled during test by power plant staff.
6) Fly ash sampling
Fly ash sampling during test, by the impacting type ash dropped unit for being mounted on air preheater outlet.Before test, ash is emptied
Flying dust in bucket, taken flying dust sample uniformly mixes during test, and carries out unburned combustible in fly ash analysis by DianKeYuan, finally will
As a result the foundation calculated as boiler thermal efficiency.
7) clinker samples
Clinker is exported in deslagging pond and is sampled during test, and each sampling interval is 30 minutes, after the test taken slag specimen
Uniformly mixing carries out unburned combustible in slag analysis by DianKeYuan, another keeps on file as test, and using result as boiler hot
The foundation of efficiency calculation.
8) environment temperature, humidity and atmosphere measuring
In the place not by boiler hot radiation effect, air blower inlet temperature and environment are measured with electronics Hygrothermograph
Humidity, aneroid barometer measure atmospheric pressure, and the record of measurement in every 15 minutes is primary during test, take arithmetic mean of instantaneous value.
9) operation data records
By the main operation data of operations staff's recording meter panel, record is primary within every 5 minutes, and data recording result takes each record
Arithmetic mean of instantaneous value.
Test result and analysis
(1) first stage test result
Under the common load such as 325MW, 300MW and 260MW, different F wind have a down dip the main measurement boiler of first stage test
Influence of the angle to flying dust.
1) test result and analysis under 325MW load
Under 325MW load, under 0 ゜ of F wind tilt angled down, 10 ゜, 15 ゜, 20 ゜, 30 ゜ flying dust and smoke components survey
Amount, coal analysis.
F wind tilt angled down unburned combustible in fly ash in 20-30 ゜ is relatively low, as shown in Figure 1.
F wind 30 ゜ that have a down dip can decline flying dust 10.82%, and 20~30 ゜ are relatively good tilt angled down.
2) test result and analysis under 300MW load
Under 300MW load, under 5 ゜ of F wind tilt angled down, 10 ゜, 20 ゜, 30 ゜ flying dust and smoke components measure.
When F wind tilt angled down is in 20-30 ゜, unburned combustible in fly ash is relatively low.
F wind 20 ゜ that have a down dip can decline flying dust 3.13%, and 20~30 ゜ are relatively good tilt angled down.
3) test result and analysis under 260MW load
Under 260MW load, under 5 ゜ of F wind tilt angled down, 10 ゜, 20 ゜, 30 ゜ flying dust and smoke components measure.
When F wind tilt angled down is in 20-30 ゜, unburned combustible in fly ash is relatively low.
F wind 20 ゜ that have a down dip can decline flying dust 2.72%, and 20 ゜ are relatively good tilt angled down.
Second stage test result
Since there are more serious overheating problems for boiler reheater, usually operation uses the side of stoppage in transit overtemperature region nozzles
Formula solves reheater overtemperatute.
During overhaul, increase SOFA spout on arch, front-back wall each four, wherein three or three liquidate, on the right side of front wall and
The mode that a spout is increased separately on the left of wall afterwards is arranged.
1) underload reheat steam turbine set overtemperature adjusts
For boiler when load is lower, reheater middle position is easy overtemperature, when investigating power plant 270MW load, stoppage in transit D3 and
Two burner nozzles of C4.
Left side oxygen amount is more relatively high than right side, and the oxygen amount in middle position is relatively low, and F wind air distribution mode has been left big right at this time
Small mode.
Alleviate this symptom by adjusting the mode of F wind tilt angled down and the air distribution of F wind, Secondary Air air distribution mode is shown in
Table 7.
7 Secondary Air air distribution mode of table
Embodiment 2
The more coal fractional combustion policy optimization methods of the present embodiment W flame boiler, on the basis of embodiment 1, comprising:
Several coals are chosen, coal elements and Industrial Analysis are carried out to the coal of selection based on thermogravimetric and infrared analysis;
Based on the coal elements and Industrial Analysis as a result, the combustion strategies of predetermined boiler, the combustion strategies are specific
Include: (1) can be formed in boiler fractional combustion coal allocation ratio and corresponding coal pulverizer coal-grinding mode;(2) no
Can be formed in boiler classification coal allocation ratio and corresponding coal pulverizer coal-grinding mode;Wherein, point of the boiler
Grade burning specifically: reacted using inflammable briquette with oxygen, become first-stage burning, wherein inflammable briquette is bituminous coal or bituminous coal and meager coal
Mixing;The high-temperature flue gas atmosphere that first stage is formed, under the sweeping along of high-temperature flue gas, ignite anthracite, forms second level combustion
It burns;
It is carried out according to scheduled combustion strategies, boiler oil combustion simulation obtains the operating condition of boiler, and the boiler working condition is extremely
Few includes heat temperature, hot temperature, spray water flux, exhaust gas temperature, unburned carbon in flue dust, boiler slag carbon content, low heat valve, row again again
Cigarette loss, empty pre- entrance oxygen amount, Mechanical adsorption, back balance furnace effect, back balance power supply mark coal, SCR inlet NOx
Content;
When to using different combustion strategies, boiler working condition is compared analysis, obtains the coal of optimal boiler fractional combustion
Kind proportion, coal pulverizer coal powder injection mode.
In the present embodiment, the combustion strategies of the predetermined boiler are specifically included:
The W type flame boiler configures four coal pulverizers, the first coal pulverizer A, the second coal pulverizer B, third coal pulverizer C,
4th coal pulverizer D;
One: the first coal pulverizer A of strategy, the second coal pulverizer B, third coal pulverizer C, the 4th coal pulverizer D grind pure burning anthracite;
Two: the first coal pulverizer A of strategy, the second coal pulverizer B, third coal pulverizer C, the 4th coal pulverizer D grind bituminous coal, smokeless
The Mixture Density Networks of coal, grind bituminous coal: anthracite is mixed according to 1:3 ratio matches;
Three: the four coal pulverizer D of strategy grind pure bituminous coal, and single coal volatile matter is limited within 20%~30%, the first mill
Coal machine A, the second coal pulverizer B, third coal pulverizer C grind anthracite, and single coal volatile matter is limited in 15% or less;
Four: the first coal pulverizer A of strategy, the second coal pulverizer B, third coal pulverizer C, the 4th coal pulverizer D grind bituminous coal, smokeless
The Mixture Density Networks of coal, grind bituminous coal: anthracite is mixed according to 1:1 ratio matches, stokehold premix;
Strategy five: bituminous coal and anthracite ratio are 1:1, bituminous coal on the first coal pulverizer, third coal pulverizer, and single coal is volatilized
Divide and be limited within 20%~30%, the second coal pulverizer, the 4th coal pulverizer grind upper anthracite, i.e., forward and backward wall respectively has a coal-grinding
Pure bituminous coal on machine, bituminous coal and anthracite ratio are 1:1;
Strategy six: the first coal pulverizer A, third coal pulverizer C grind bituminous coal, anthracitic Mixture Density Networks, grind bituminous coal: anthracite according to
7 ︰, 3 ratio mix matching, the second coal pulverizer B, the 4th coal pulverizer D grind bituminous coal, anthracitic Mixture Density Networks, bituminous coal: anthracite according to
3 ︰, 7 ratio mix matching;
Seven: the first coal pulverizer A of strategy, the second coal pulverizer B, third coal pulverizer C, on the 4th coal pulverizer D bituminous coal grind bituminous coal,
Anthracite Mixture Density Networks, bituminous coal: anthracite is mixed according to 3 ︰, 1 ratio matches;
Tactful eight: the four coal pulverizer D anthracites, single coal volatile matter are limited in 15% hereinafter, the first coal pulverizer A, the
Two coal pulverizer B, third coal pulverizer C grind bituminous coal, and single coal volatile matter is limited within 20%~30%, and bituminous coal: anthracite is pressed
It mixes and matches according to 3 ︰, 1 ratio;
Nine: the first coal pulverizer A of strategy, the second coal pulverizer B, third coal pulverizer C, the 4th coal pulverizer D grind mill bituminous coal, poor
The Mixture Density Networks of coal, Yan Mei ︰ meager coal is mixed according to 7 ︰, 3 ratio matches;
Ten: the first coal pulverizer A of strategy, the second coal pulverizer B, third coal pulverizer C, the 4th coal pulverizer D grind mill bituminous coal, poor
The Mixture Density Networks of coal, Yan Mei ︰ meager coal is mixed according to 3 ︰, 7 ratio matches;
The 11: the first coal pulverizer A of strategy, the second coal pulverizer B, third coal pulverizer C, bituminous coal grinds mill on the 4th coal pulverizer D
Coal anthracite, meager coal, bituminous coal Mixture Density Networks, coal-grinding mixes and matches Wu Yan Mei ︰ Pin Mei ︰ bituminous coal=2 ︰, 4 ︰, 4 ratio;
Wherein, strategy two to six, strategy eight, strategy 11 are the coal allocation ratio that fractional combustion can be formed in boiler
And corresponding coal pulverizer coal-grinding mode;
Strategy one, strategy one, seven, nine, ten are that the coal allocation ratio of classification and corresponding cannot be formed in boiler
Coal pulverizer coal-grinding mode.
Bituminous coal: anthracite (1:3) fractional combustion comparative test
Bituminous coal and anthracite ratio are carried out first as the comparative test of 1:3, i.e. the comparison of strategy one, two, three is specific to survey
Test result see the table below.As can be seen from the table:
After mixing the bituminous coal with about 25%, exhaust gas temperature reduces about 10 DEG C;Unburned carbon in flue dust reduces about 2.5%, and machinery is endless
Full combustion heat loss reduces about 1%;Furnace effect promotes about 1.6%;Net coal consumption rate reduces about 6g/kWh.
It mixes under the Blended Coal Combustion mode with certain proportion bituminous coal, bituminous coal ignition first, forms first stage kindling, be
Anthracitic kindling creates advantageous condition, helps to improve anthracitic kindling and after-flame in furnace, superheated steam temperature reduction water
Amount reduces about 2kg/s, and combustion flame has the tendency that obviously moving down.
Strategy two and strategy three compare, it can be seen that grind bituminous coal using separate unit coal pulverizer, bituminous coal fire area phase in furnace
To concentration, bituminous coal kindling high-temperature area is formed, the temperature levels promoted in furnace is more advantageous to, promotes anthracitic burning;With furnace
Preceding premix mode is compared, 7.28 DEG C of exhaust gas temperature reduction, unburned carbon in flue dust reduction by 0.09%, slag phosphorus content reduction by 0.18%,
Furnace effect improves 0.40%;Net coal consumption rate reduces 1.45g/kWh.
Table 5-4 bituminous coal: anthracite (1:3) fractional combustion comparative test result
Bituminous coal: anthracite (1:1) fractional combustion comparative test
Bituminous coal and anthracite ratio are carried out as the comparative test of 1:1, i.e. the comparison of strategy four, five, six, specific test is tied
Fruit see the table below.As can be seen from the table:
Strategy five is compared with strategy four, and unburned carbon in flue dust is down to 7.72% by 7.91%, and boiler slag carbon content is dropped by 7.54%
To 7.13%, corresponding unburned carbon loss reduces by 0.09%, illustrates that front-back wall point mill mixes burning and preferably resolves cigarette
The influence of coal " tacking " improves anthracitic burn-off rate in furnace.
For strategy five compared with strategy four, spray water flux variation less, illustrates that furnace flame center does not change significantly.
Fineness of pulverized coal is measured, for strategy five compared to strategy four, 4 mill average fineness R75 reduce 1.25%,
The middle coal pulverizer fineness for burning bituminous coal reduces, and burns anthracitic coal pulverizer fineness of pulverized coal and increases.
Strategy four, strategy five increase the proportion of bituminous coal, and especially five, A/C of strategy grinds and grinds bituminous coal completely, need pair
Pulverizer outlet temperature is reduced to 90 DEG C of operations, guarantees pulverized coal preparation system safety and stability.
Comprehensive strategic five, the loss of tactful four boiler items, boiler back balance furnace effect are improved by 90.60% to 90.82%,
Back balance coal consumption of power supply reduces 0.78g/kWh.
Strategy six is compared with strategy four, and unburned carbon in flue dust is down to 7.57% by 7.91%, and boiler slag carbon content is by 7.54% drop
To 7.26%, corresponding unburned carbon loss reduces by 0.13%, illustrates unequal proportion, and local high volatile is concentrated
Atmosphere is more advantageous to anthracitic burning in entire furnace, creates advantage for the kindling and after-flame of coal dust in furnace.
For strategy six compared with strategy four, desuperheating water of superheater reduces 2.3kg/s, also further illustrates the high volatilization of part
Atmosphere in diversity is conducive to anthracite ignition in furnace and shifts to an earlier date, and furnace flame center moves down.
The characteristics of tactful six unequal proportion can be made full use of, air temperature of B/D disintegrating outlet on the one hand can be improved,
Improve boiler efficiency;On the other hand, can use the characteristics of A/C grinds bituminous coal large percentage, as boiler startup means (see
Boiler bituminous coal starts chapters and sections).
Comprehensive strategic six and tactful four boiler items are lost, and boiler back balance furnace effect is improved extremely by 90.60% before testing
90.79%, 0.19% is increased, back balance mark coal consumption reduces 0.67g/kWh.
Overall relatively a point mill for strategy five, which is mixed, matches, and can effectively improve boiler efficiency, reduce spray water flux, reduces power supply
The advantage of coal consumption and NOx emission.
Table 5-5 bituminous coal: anthracite (1:1) fractional combustion comparative test result
Bituminous coal: anthracite (3:1) fractional combustion comparative test
Bituminous coal and anthracite ratio are carried out as the comparative test of 3:1, i.e. the comparison of strategy one, seven, eight, specific test is tied
Fruit see the table below.As can be seen from the table:
(1) strategy seven and strategy eight, compared with strategy one, with the raising of bituminous coal ratio in furnace, unburned carbon in flue dust is reduced
About 3%, boiler slag carbon content reduces about 2.5%, and unburned carbon loss reduces about 1.5%.Illustrate with bituminous coal ratio
Raising, bituminous coal and anthracitic kindling are more stable in furnace, and burn-off rate is higher.Bituminous coal is nothing as first order fuel combustion
The second level burning of bituminous coal creates favorable environment, improves anthracitic burn-off rate;And with anthracitic burning, also promote
The after-flame of bituminous coal in into furnace.
(2) strategy seven and strategy eight, compared with strategy one, most apparent variation is that NOx emission decline is obvious, by
1730mg/Nm3 is reduced to 629mg/Nm3, decline about 64%.Illustrate the raising with bituminous coal ratio in furnace, furnace flame it is strong
Degree weakens, the decline of flame of centre temperature, is conducive to mitigate thermal NO x generation.
(3) strategy seven and strategy eight, compared with strategy one, spray water flux is down to 19.71kg/s by 26.71kg/s, reduces
7.00kg/s illustrates the raising with bituminous coal ratio in furnace, forms secondary firing mode, significantly reduces furnace flame height
Degree, the interior burning of entire furnace shift to an earlier date, and anthracitic ignition distance is elongated, is conducive to the kindling of coal dust and after-flame in furnace.
(4) strategy seven is compared with strategy eight, and combustion conditions relatively, do not change significantly in entire furnace.
Table 5-6 bituminous coal: anthracite (3:1) fractional combustion comparative test result
Meager coal, bituminous coal, anthracite fractional combustion comparative test
Anthracite, meager coal, bituminous coal fractional combustion comparative test, the i.e. ratio of strategy nine, strategy ten, strategy 11 are carried out
Compared with specific test result see the table below.As can be seen from the table:
Strategy nine, strategy ten, strategy 11, compared with strategy one, as anthracite ratio declines in furnace, bituminous coal and meager coal
The raising of ratio, unburned carbon in flue dust reduce about 3.8%, and boiler slag carbon content reduces about 3.1%, and unburned carbon loss reduces
About 1.7%.Illustrate the raising with bituminous coal, meager coal ratio, bituminous coal, meager coal, more stable, the after-flame of anthracitic kindling in furnace
Rate is higher.Bituminous coal and meager coal create favorable environment for the burning of the anthracitic second level, improve as first order fuel combustion
Anthracitic burn-off rate;And with anthracitic burning, the after-flame of bituminous coal in furnace, meager coal is also promoted.
(1) strategy nine, strategy ten, strategy 11, compared with strategy one, most apparent variation is that NOx emission decline is bright
It is aobvious, by 1730mg/Nm3, it is reduced to 630mg/Nm3, decline about 64%;Illustrate the raising with bituminous coal ratio in furnace, furnace endogenous fire
The remitted its fury of flame, the decline of flame of centre temperature are conducive to the generation for mitigating thermal NO x.
(2) strategy nine, strategy ten, strategy 11, compared with strategy one, spray water flux is down to by 26.71kg/s
18.25kg/s reduces 8.50kg/s, illustrates the raising with bituminous coal, meager coal ratio in furnace, forms secondary firing mode, effectively
Ground reduces furnace flame height, and burning shifts to an earlier date in entire furnace, and anthracitic ignition distance is elongated, be conducive to coal dust in furnace
Fire and after-flame.
(3) strategy nine, strategy ten, strategy 11, combustion conditions relatively, do not change significantly in entire furnace.
(4) strategy 11, coal blending difficulty is larger, is mixed by coal yard, and accuracy there is a problem of very big.
Table 5-8 meager coal, bituminous coal, anthracite fractional combustion comparative test result
Embodiment 3
As shown in figure 3, the more coal fractional combustion policy optimization methods of the present embodiment W flame boiler, aileron is longitudinally opened 4 and is led to
Secondary Air is inwardly blown in wind gap, and water screen tube outer diameter is larger (120.65mm) at aileron, and center is away from for 146.4mm, the gap pipe A
For 25.4mm, and aileron upper and lower part tube outer diameter is smaller (69.85mm), and original design connects both ends by reducer pipe B,
The extra heavy pipe at four ventilation strips divulged information need to will be needed to be changed to tubule (moving down top concentric reducer position), pipe gap can
It broadens as 76.55mm, ventilation effect is good, can prevent aileron water screen tube large-area coking, increases the anti-scorch wind optimization side of aileron
Case is as shown in Figure 4.The height of ventilation strip may be configured as the total length of aileron pipe, can also be provided only on aileron top half, lead to
The longer effect of wind band is more obvious.
Aileron wall with refractory lining, refracto is not necessary to large area removal in this way, need to only remove defending in each 1 root canal in ventilation slot two sides
Combustion band is smaller to combustion effects.In this scheme, after top concentric reducer position moves down, analyzed according to water circulation calculation, it can be straight
The light pipe with same specification is connect, water circulation calculation is safe.
Reduce refractory belt area
According to similarity theory, aileron wall with refractory lining, refracto handling suggestion is suggested as follows: aileron pipe water circulation is safe;If
Aileron wall with refractory lining, refracto is removed, the fin end temperature of portion's fin can be made close to 600 DEG C, fin is easily caused to cross cause thermal damage.So from boiler
Long-term safety set out and generally do not remove wall with refractory lining, refracto at this.
Wall with refractory lining, refracto modification scheme one
According to actual motion boiler design, the operating experience of domestic more boilers, if running coal quality from now in conjunction with this engineering
The case where (Vdaf >=15%), wall with refractory lining, refracto modification scheme one implement (area of wall with refractory lining, refracto with it is minimum not throw the oily load that surely fires related,
The two is inversely).It is expected that minimum do not throw oily steady combustion load≤45%BMCR.
Wall with refractory lining, refracto modification scheme two
If this engineering will be run the case where coal quality (Vdaf≤12%) from now on, wall with refractory lining, refracto transformation can refer to two (wall with refractory lining, refracto of scheme
Area do not throw that oily steady combustion load is related, and the two is inversely with minimum).It is expected that minimum do not throw oily steady combustion load≤40%
BMCR
Wall with refractory lining, refracto modification scheme three
If this engineering will run the case where coal quality (Vdaf≤12%) from now on, in conjunction with the practical lateral thinking of owner, wall with refractory lining, refracto
Transformation can refer to scheme three (area of wall with refractory lining, refracto oily surely fires that load is related, and the two is inversely with minimum do not throw), it is contemplated that most
It is low not throw oily steady combustion load≤40%BMCR.
To guarantee boiler combustion stability, a large amount of wall with refractory lining, refracto are laid in burner hearth, to improve fire box temperature, guarantee to stablize combustion
It burns, but fire box temperature can be higher than ash fusion point.The region of wall with refractory lining, refracto laying will be varied according to the difference of coal quality, and burning coal is got over
The wall with refractory lining, refracto area that need to be laid when poor is more.Former FW wall with refractory lining, refracto laying theory (in the case of combustion anthracite, arch, front and back vertical wall,
The case where aileron (cutting), 1st~4 area of side wall are both needed to lay, and 5th~6 area regard coal quality in the middle part of dry bottom hopper top, dry bottom hopper is applied as preparation
If region, the position schematic diagram of wall with refractory lining, refracto laying is as shown in Figure 1.
The present invention chooses pure bituminous coal on three coal pulverizers, preferentially starts this three coal pulverizers.In hot starting, hot start, preferentially
Start the coal pulverizer mixed with large scale bituminous coal, realizes the target of unit bituminous coal hot starting, hot start.Open mill sequence be changed to by opposite side it is ipsilateral.
Cancel limitation of the original main steam flow less than 40%.Improve warm mill mode.Pre-cooling primary air fan, it is lower in furnace temperature
Stage, in advance pre-warm heat primary air pipeline and coal pulverizer.After pulverized coal preparation system starts and throws powder, initial stage coal dust can be obviously improved
Kindling, it is the time that it is combustion-supporting, which to reduce oil gun,.
Sufficient starting bituminous coal is had in coal yard, it is desirable that volatile matter is 30%, calorific value 20000kJ/kg or more.
Compared with four coal pulverizers grind the scheme that pure burning anthracite burns, the scheme NOx that the present embodiment uses is arranged
It is obvious to put down drop, by 1730mg/Nm3, is reduced to 629mg/Nm3, decline about 64%.With the raising of bituminous coal ratio in furnace, furnace
The remitted its fury of flame, the decline of flame of centre temperature are conducive to mitigate thermal NO x generation.
The present invention grinds bituminous coal using separate unit coal pulverizer, bituminous coal fire area Relatively centralized in furnace, and it is high to form bituminous coal kindling
Temperature area is more advantageous to the temperature levels promoted in furnace, promotes anthracitic burning;Compared with stokehold premixes mode, smoke evacuation temperature
Degree reduces by 7.28 DEG C, unburned carbon in flue dust reduction by 0.09%, and slag phosphorus content reduces by 0.18%, furnace effect and improves 0.40%;Power supply coal
Consumption reduces 1.45g/kWh.
In the various embodiments described above, as-fired coal dry ash free basis volatile matter content is maintained at 15% < Vdaf < 20%, enters furnace
Coal low heat valve is maintained at 20MJ/kg < Qnet, ar < 22.5MJ/kg.
It is relatively low to run oxygen amount.Under 335MW load, oxygen content at economizer outlet is only 1.06%, and uses anthracitic boiler
For design and operation oxygen amount usually 3.35% or more, oxygen amount, which can not be replenished in time, will lead to being significantly increased for unburned carbon in flue dust.?
When 262MW load, operation oxygen amount is improved to 1.60% or more, unburned carbon in flue dust namely is declined therewith.In the various embodiments described above,
Under 335MW load, air output is controlled in 241m3/ s runs 1.83% or more oxygen amount;Under 300MW load, air output control exists
222m3/ s runs 2.58% or more oxygen amount.
In the various embodiments described above, racemization pull rod is placed in extreme lower position.The position of racemization pull rod also has one to boiler energy consumption
Fixing is rung.By racemization pull rod all in extreme lower position, boiler efficiency is relatively high, and desuperheating water of superheater amount can reduce about 10t/h
More than, unburned carbon in flue dust is also declined, and is the more economical method of operation.
Present invention selection: coal quality 1 --- high flat anthracite, coal quality 2 --- Lvliang City's bituminous coal, coal quality 3 --- Changzhi meager coal, coal
Matter 4 ---+75% bituminous coal of 25% anthracite, coal quality 5 ---+50% bituminous coal of 50% anthracite, coal quality 6 --- 75% anthracite+
+ 37.5% cigarette of 25% bituminous coal, coal quality 7 ---+25% bituminous coal of 75% meager coal, coal quality 8 ---+30% meager coal of 32.5% anthracite
+ 42.5% meager coal of coal, coal quality 9 ---+40% bituminous coal of+35% meager coal of 25% anthracite, coal quality 10 --- 20% anthracite+
37.5% bituminous coal carries out different coal elements and Industrial Analysis.Flat anthracite high to southeast Shanxi Shanxi, Shanxi Jinzhong Lvliang City bituminous coal,
Shanxi southeast Shanxi Changzhi meager coal and various different coal quality mixing samples have carried out the thermogravimetric analysis of different types of coal, obtain coal
Thermogravimetric (TG) curve, by the available weight-loss ratio of TG curve.
Test is tested under 10~20 μ l/min ventilation flow rates, can control burning excess air coefficient on 1.2 left sides
It is right.Sample quality is 20 ± 0.1mg, is dried in advance;Coal powder size is ﹤ 0.2mm;Heating rate is 40K/min;Air stream
Amount is 100ml/min;Operating temperature: room temperature~1200 DEG C.1200 DEG C are warming up to 40 DEG C/min when test, constant temperature 5min is obtained
To combustion pattern.Bituminous coal is introduced into burning weight loss region compared with anthracite, and also early reaching burning weight loss terminates temperature, with cigarette
The raising of coal mixture proportion, entire curve move to the left, it was demonstrated that combustion case changes, from compared with difficult to burn gradually to being easier to
Burning is excessive.
Figure 12 is anthracite compared with bituminous coal different proportion zero-g aircraft.Match it can be seen from the figure that being mixed in anthracite
Bituminous coal, with the increase of bituminous coal ratio, burning weight loss start temperature and end temperature are decreased obviously, and illustrate the bituminous coal of high volatile
It has a certain impact to anthracitic kindling.When anthracite ratio is greater than 50%, bituminous coal influences to become on the kindling of mixing coal sample
It is small, it was demonstrated that if mixing the fractional combustion mode matched using bituminous coal and anthracite, it should be ensured that bituminous coal ratio is higher than 50%, Cai Nengbao
Demonstrate,prove the effect of fractional combustion.
The maximum weightless temperature for mixing coal quality is as shown in figure 13.Tested by thermogravimetric analysis, consider bituminous coal, anthracite according to
The ratio of > 1:1 or even 3:1, which are mixed, matches, and can change the combustion characteristics of as-fired coal matter, forms furnace internal classification combustion system, can be with
Igniting temperature of pulverized-coal is reduced, the combustion position in furnace is improved, it is ensured that the after-flame of coal dust has ignition of the boiler, steady combustion obvious excellent
Gesture.
The present invention carries out the high flat anthracite in southeast Shanxi Shanxi, Shanxi Jinzhong Lvliang City bituminous coal, Shanxi southeast Shanxi Changzhi meager coal
Sampling, by method associated with ftir Analysis, analyzes coal sample, and emphasis monitors the gas being affected to boiler combustion
Body ingredient: NO, CO, H2S.
As can be seen that bituminous coal, the discharge of meager coal NO are higher from test.With bituminous coal, the raising of meager coal ratio, NO discharge
Also it gradually rises, this NO belongs to fuel type NOx, can reduce the discharge of NOx with the adjustment of air distribution mode by burning.
From test, hence it is evident that the raising of bituminous coal, meager coal ratio is also relatively also easy to produce the reducibility gas such as CO, H2S, to heated
The high temperature corrosion characteristic in face enhances, and should draw attention during Actual combustion.
The above is only a preferred embodiment of the present invention, it is not intended to restrict the invention, it is noted that for this skill
For the those of ordinary skill in art field, without departing from the technical principles of the invention, can also make it is several improvement and
Modification, these improvements and modifications also should be regarded as protection scope of the present invention.
Claims (7)
1. a kind of more coal fractional combustion policy optimization methods of W flame boiler characterized by comprising
It is negative in difference when fuel in boiler is the coal blend ratio of best boiler fractional combustion, coal pulverizer coal powder injection mode situation
Under lotus, in the operation conditions of different F layer Secondary Air tilt angled downs, wherein the operation conditions includes at least: economizer goes out
NOx, CO, O of mouth flue gas2;NOx, CO, O of air preheater exiting flue gas2;Boiler thermal efficiency;As-fired coal industry, elemental analysis;Fly
Ash, clinker sampling analysis;Economizer exit flue-gas temperature;Air preheater exit gas temperature;Raw coal sampling;Environment temperature, humidity
And atmospheric pressure;
The operation conditions of the boiler of acquisition is analyzed, determines F wind tilt angled down and D, E wind aperture are as follows:
Wall afterwards: respectively correspond from left to right burner D1, burner A1, burner D2, burner combustion device A2, burner D3,
The F wind tilt angled down of burner A3, burner D4, burner A4, burner D5, burner A5, burner D6, burner A6:
25,25,5,5,30,30,30,30,5,5,25,25;E wind aperture: 25,25,5,20,20,20,20,20,5,5,10,10;D wind
Aperture: 5,5,5,5,5,5,5,5,5,5,5,5;
Front wall: burner C1, burner B1, burner C2, burner B2, burner C3, burner are respectively corresponded from left to right
25 the F wind tilt angled down of B3, burner C4, burner B4, burner C5, burner B5, burner C6, burner B6: 25,
5,5,30,30,30,30,5,5,25,25;E wind aperture: 25,25,5,20,20,20,20,20,5,5,10,10;D wind aperture: 5,
5,5,5,5,5,5,5,5,5,5,5;
Wherein, the fuel in boiler is the determination method packet of the coal blend ratio of best boiler fractional combustion, coal pulverizer coal powder injection mode
It includes:
Several coals are chosen, coal elements and Industrial Analysis are carried out to the coal of selection based on thermogravimetric and infrared analysis;
Based on the coal elements and Industrial Analysis as a result, the combustion strategies of predetermined boiler, the combustion strategies specifically include:
(1) can be formed in boiler fractional combustion coal allocation ratio and corresponding coal pulverizer coal-grinding mode;(2) cannot
Formed in boiler classification coal allocation ratio and corresponding coal pulverizer coal-grinding mode;Wherein, the classification of the boiler
Burning specifically: reacted using inflammable briquette with oxygen, become first-stage burning, wherein inflammable briquette is bituminous coal or bituminous coal and meager coal
Mixing;The high-temperature flue gas atmosphere that first stage is formed, under the sweeping along of high-temperature flue gas, ignite anthracite, forms second level burning;
It is carried out according to scheduled combustion strategies, boiler oil combustion simulation obtains the operating condition of boiler, and the boiler working condition at least wraps
Including heat, temperature, spray water flux, exhaust gas temperature, unburned carbon in flue dust, boiler slag carbon content, low heat valve, smoke evacuation are damaged again for temperature, heat again
It loses, empty pre- entrance oxygen amount, Mechanical adsorption, back balance furnace effect, back balance power supply mark coal, SCR inlet NOx contain
Amount;
When to using different combustion strategies, boiler working condition is compared analysis, and the coal for obtaining optimal boiler fractional combustion is matched
Than, coal pulverizer coal powder injection mode;
It further include that SOFA spout is equipped on arch, front-back wall each four, wherein three or three liquidate, on the right side of front wall and rear wall left side is respectively
The mode that a spout is arranged is arranged;
Aileron longitudinally opens 4 ventilation gaps and inwardly blows Secondary Air, water screen tube outer diameter 120.65mm at aileron, center away from for
146.4mm, the pipe gap of water screen tube are 25.4mm, aileron upper and lower part tube outer diameter 69.85mm, water screen tube and the wing
Wall upper and lower part pipe is connected by reducer pipe, and the outer diameter of the water screen tube at four ventilation gaps of ventilation is less than
120.65mm, the pipe gap of the water screen tube at four ventilation gaps of ventilation are 76.55mm, and the height of ventilation gaps is arranged
For the total length of aileron pipe, or it is arranged in aileron top half.
2. the more coal fractional combustion policy optimization methods of W flame boiler according to claim 1, which is characterized in that save coal
NOx, CO, O of device exiting flue gas2Measurement uses gridding method, and every side flue takes five measuring points, and each flue is mixed into a flue gas
Sample is analyzed, and every side air preheater exiting flue gas ingredient takes the arithmetic mean of instantaneous value of flue, and boiler discharging flue gas ingredient takes 2 flues
Arithmetic mean of instantaneous value;
Economizer exit flue-gas temperature uses grid survey, and the arithmetic average per each measurement point side-draw is as the average flue gas in outlet
Temperature;
The measurement of air preheater exit gas temperature uses gridding method, totally 2 flues, and every side air preheater exports average flue-gas temperature and takes survey
Measure the arithmetic mean of instantaneous value of point.
3. the more coal fractional combustion policy optimization methods of W flame boiler according to claim 1, which is characterized in that described
Predetermined boiler combustion strategies, specifically include:
The W flame boiler configures four coal pulverizers, the first coal pulverizer A, the second coal pulverizer B, third coal pulverizer C, the 4th mill
Coal machine D;
One: the first coal pulverizer A of strategy, the second coal pulverizer B, third coal pulverizer C, the 4th coal pulverizer D grind anthracite;
Two: the first coal pulverizer A of strategy, the second coal pulverizer B, third coal pulverizer C, the 4th coal pulverizer D grind bituminous coal, anthracitic mixed
Coal is closed, bituminous coal: anthracite is mixed according to 1:3 ratio matches;
Three: the four coal pulverizer D of strategy grind pure bituminous coal, and single coal volatile matter is limited within 20%~30%, the first coal pulverizer
A, the second coal pulverizer B, third coal pulverizer C grind anthracite, and single coal volatile matter is limited in 15% or less;
Four: the first coal pulverizer A of strategy, the second coal pulverizer B, third coal pulverizer C, the 4th coal pulverizer D grind bituminous coal, anthracitic mixed
Coal is closed, bituminous coal: anthracite is mixed according to 1:1 ratio matches, stokehold premix;
Strategy five: bituminous coal and anthracite ratio are 1:1, bituminous coal on the first coal pulverizer, third coal pulverizer, and single coal volatile matter limits
For system within 20%~30%, the second coal pulverizer, the 4th coal pulverizer grind upper anthracite, i.e., forward and backward wall respectively has on a coal pulverizer
Pure bituminous coal, bituminous coal and anthracite ratio are 1:1;
Strategy six: the first coal pulverizer A, third coal pulverizer C grind bituminous coal, anthracitic Mixture Density Networks, bituminous coal: anthracite compares according to 7 ︰ 3
Example mix matching, and the second coal pulverizer B, the 4th coal pulverizer D grind bituminous coal, anthracitic Mixture Density Networks, bituminous coal: anthracite compares according to 3 ︰ 7
Example mix matching;
Seven: the first coal pulverizer A of strategy, the second coal pulverizer B, third coal pulverizer C, the 4th coal pulverizer D grind bituminous coal, anthracite mixing
Coal, bituminous coal: anthracite is mixed according to 3 ︰, 1 ratio matches;
Eight: the four coal pulverizer D of strategy grind anthracite, and single coal volatile matter is limited in 15% hereinafter, the first coal pulverizer A, second
Coal pulverizer B, third coal pulverizer C grind bituminous coal, and single coal volatile matter is limited within 20%~30%, bituminous coal: anthracite according to
3 ︰, 1 ratio, which is mixed, matches;
Nine: the first coal pulverizer A of strategy, the second coal pulverizer B, third coal pulverizer C, the 4th coal pulverizer D grind the mixing of bituminous coal, meager coal
Coal, Yan Mei ︰ meager coal is mixed according to 7 ︰, 3 ratio matches;
Ten: the first coal pulverizer A of strategy, the second coal pulverizer B, third coal pulverizer C, the 4th coal pulverizer D grind the mixing of bituminous coal, meager coal
Coal, Yan Mei ︰ meager coal is mixed according to 3 ︰, 7 ratio matches;
The 11: the first coal pulverizer A of strategy, the second coal pulverizer B, third coal pulverizer C, the equal coal-grinding of bituminous coal is smokeless on the 4th coal pulverizer D
Coal, meager coal, bituminous coal Mixture Density Networks, coal mixes and matches Wu Yan Mei ︰ Pin Mei ︰ bituminous coal=2 ︰, 4 ︰, 4 ratio;
Wherein, strategy two to six, strategy eight, strategy 11 be can be formed in boiler fractional combustion coal allocation ratio and
Corresponding coal pulverizer coal-grinding mode;
Strategy one, seven, nine, ten is the coal allocation ratio and corresponding coal pulverizer coal-grinding that classification cannot be formed in boiler
Mode.
4. the more coal fractional combustion policy optimization methods of W flame boiler according to claim 3, which is characterized in that
In strategy five, when boiler combustion, the first coal pulverizer A, third coal pulverizer C disintegrating outlet temperature be 118 DEG C, third coal pulverizer
Disintegrating outlet temperature be 109 DEG C;
It is preferential to start the first coal pulverizer, three the second coal pulverizer, third coal pulverizer coal pulverizers when boiler combustion in strategy eight, it opens
Mill sequence is ipsilateral, pre-cooling primary air fan.
5. the more coal fractional combustion policy optimization methods of W flame boiler according to claim 1, which is characterized in that racemization
Pull rod is placed in extreme lower position.
6. the more coal fractional combustion policy optimization methods of W flame boiler according to claim 1, which is characterized in that bituminous coal
Volatile matter content be higher than anthracite, and volatile matter > 25%, bituminous coal, anthracitic proportion are 3:1.
7. the more coal fractional combustion policy optimization methods of W flame boiler according to claim 1, which is characterized in that
Under 335MW load, air output control runs 1.83% or more oxygen amount in 241m3/s;Under 300MW load, air output control exists
222m3/s runs 2.58% or more oxygen amount.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201610390809.9A CN107355775B (en) | 2016-06-02 | 2016-06-02 | The more coal fractional combustion policy optimization methods of W flame boiler |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201610390809.9A CN107355775B (en) | 2016-06-02 | 2016-06-02 | The more coal fractional combustion policy optimization methods of W flame boiler |
Publications (2)
Publication Number | Publication Date |
---|---|
CN107355775A CN107355775A (en) | 2017-11-17 |
CN107355775B true CN107355775B (en) | 2019-08-16 |
Family
ID=60271394
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201610390809.9A Active CN107355775B (en) | 2016-06-02 | 2016-06-02 | The more coal fractional combustion policy optimization methods of W flame boiler |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN107355775B (en) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN109631009B (en) * | 2019-01-04 | 2020-05-15 | 苏州西热节能环保技术有限公司 | Opposite-impact coal-fired boiler tube wall temperature integral optimization debugging method |
CN114110570A (en) * | 2021-11-01 | 2022-03-01 | 哈尔滨工业大学 | W flame boiler capable of flexibly adjusting peak by using reserved coal bunker and boiler peak adjusting method |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB750776A (en) * | 1953-10-02 | 1956-06-20 | Foster Wheeler Ltd | Improvements in vapour generating apparatus |
CN203131815U (en) * | 2012-05-24 | 2013-08-14 | 哈尔滨锅炉厂有限责任公司 | Combustion device for W-shaped flame boiler |
CN104180365A (en) * | 2014-08-29 | 2014-12-03 | 国家电网公司 | Blending combustion method of W-flame boiler using large-difference coal types |
CN105276611A (en) * | 2015-11-25 | 2016-01-27 | 广东电网有限责任公司电力科学研究院 | Adjustment and optimization method and system for combustion of power plant boiler |
-
2016
- 2016-06-02 CN CN201610390809.9A patent/CN107355775B/en active Active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB750776A (en) * | 1953-10-02 | 1956-06-20 | Foster Wheeler Ltd | Improvements in vapour generating apparatus |
CN203131815U (en) * | 2012-05-24 | 2013-08-14 | 哈尔滨锅炉厂有限责任公司 | Combustion device for W-shaped flame boiler |
CN104180365A (en) * | 2014-08-29 | 2014-12-03 | 国家电网公司 | Blending combustion method of W-flame boiler using large-difference coal types |
CN105276611A (en) * | 2015-11-25 | 2016-01-27 | 广东电网有限责任公司电力科学研究院 | Adjustment and optimization method and system for combustion of power plant boiler |
Non-Patent Citations (2)
Title |
---|
W型火焰锅炉无烟煤掺烧烟煤试验研究;柳宏刚等;《热力发电》;20130131;摘要,第36页第1栏第2段,第36页第2栏第1段,第2-3节,表1 |
拱下二次风下倾角可调的W型锅炉燃烧特性试验分析;石践等;《热力发电》;20121231;第25-29页,所有图表 |
Also Published As
Publication number | Publication date |
---|---|
CN107355775A (en) | 2017-11-17 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN104748104B (en) | A kind of coupling fractional combustion and the low NOx chain furnace of flue gas recirculation | |
CN107355774B (en) | The method for reducing W type flame boiler unburned carbon in flue dust | |
CZ280436B6 (en) | Group concentric tangential combustion system | |
CN105783025B (en) | A method of wind powder distribution in the low NOx tangential firing boilers stove of monitoring | |
CN103134049B (en) | A kind of multiple dimensioned coal dust decoupling combustion device of the polygonal circle of contact and decoupling burning method thereof | |
CN107355802B (en) | W type flame boiler staged-combustion method | |
US20090183660A1 (en) | Method for controlling the combustion air supply in a steam generator that is fueled with fossil fuels | |
CN107208887A (en) | The solid and full-automatic smokeless water-heating/steam boiler of liquid/gas fuel that can be adjusted according to coal type | |
CN107355809A (en) | Reduce W type flame boilers NOxThe method of discharge | |
CN107355775B (en) | The more coal fractional combustion policy optimization methods of W flame boiler | |
JPS6266007A (en) | Primary air exchange for pulverized coal burner | |
Zheng et al. | Impact of co-firing lean coal on NO x emission of a large-scale pulverized coal-fired utility boiler during partial load operation | |
CN103672950B (en) | The firing optimization method of the W type flame furnace that the lower Secondary Air tilt angled down of arch is adjustable | |
CN107355804B (en) | Efficacious prescriptions method is mentioned to W type flame boiler fractional combustion | |
CN110397911A (en) | Numerical control air-coal ratio low-NOx and low-CO efficient hedging rotational flow combustion control system | |
CN107355811B (en) | Boiler combustion optimization method of adjustment | |
CN107355807A (en) | W type flame boiler air distribution mode optimization methods | |
CN107355803A (en) | The method for lifting W types shape Flame Boiler Furnace effect | |
CN202484975U (en) | Chain-grate boiler for mixed combustion of rice hulls and coals | |
CN106838971A (en) | A kind of biomass bundling fuel chain-grate boiler air feed system | |
US2239341A (en) | Furnace | |
CN106678782A (en) | Bowl-shaped or W-shaped wind distributing method for rotational flow combustion of large power station coal-fired boiler | |
CN105757710A (en) | Combustion optimization method for east Junggar coal blending combustion in boiler | |
CN107355808A (en) | W type boilers jet optimizes system | |
CN101806452B (en) | Micro oil content ignition coal powder burner capable of improving initial ignition heat |
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 | ||
CB03 | Change of inventor or designer information |
Inventor after: Liu Yanpeng Inventor after: Liu Yinshun Inventor after: Qiao Yongcheng Inventor after: Zhang Xin Inventor before: Zhang Xin |
|
CB03 | Change of inventor or designer information |