CN106224951B - It is a kind of to be used for the stable low NO device and method for controlling combustion to burn - Google Patents
It is a kind of to be used for the stable low NO device and method for controlling combustion to burn Download PDFInfo
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- CN106224951B CN106224951B CN201610633847.2A CN201610633847A CN106224951B CN 106224951 B CN106224951 B CN 106224951B CN 201610633847 A CN201610633847 A CN 201610633847A CN 106224951 B CN106224951 B CN 106224951B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D1/00—Burners for combustion of pulverulent fuel
- F23D1/02—Vortex burners, e.g. for cyclone-type combustion apparatus
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- 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
- F23C7/008—Flow control devices
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- 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
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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
Abstract
It is used for the stable low NO device and method for controlling combustion to burn the invention discloses a kind of, includes main air duct and circumference air channel for the stable low NO device to burn；The outlet of main air duct and circumference air channel is connected with the spout of burner；Circumference air channel is located at the surrounding of main air duct leading portion.The cross section of main air duct is square；The cross section in circumference air channel is three-back-shaped.The both sides up and down in circumference air channel are provided with multi-disc surrounding air spinning disk.The low NO device for being used for stable burning and method for controlling combustion of the present invention can effectively prevent brush wall phenomenon of the coal dust to burner water-cooling wall, ensure the stable burning of coal dust in the burner.
Description
Technical field
It is used for the stable low NO device and method for controlling combustion to burn the present invention is more particularly directed to a kind of.
Background technology
Because Beijing-tianjin-tangshan Area, the bad weather of air quality more and more frequently occurred in recent years, each big and medium-sized cities in the whole nation
There is the haze weather of different times, seriously affect the production and life of people.State Council issued on the 10th in September in 2013
《Prevention and control of air pollution action plan》(2013.9.10).It is mentioned that accelerate key industry desulphurization and denitration, dedusting transformation work
Cheng Jianshe.It is strict to implement pollutant emission factor, sulfur dioxide, nitrogen oxides, smoke-dust and volatile organic matter are arranged
Put and whether meet the precondition that overall control requirement is examined as Environmental Impact Assessment of Construction Items.This is just the denitration of boiler
Market, there is provided policy support, and propose technological guidance's property specification opinion of industry.
Brush wall phenomenon easily occurs for existing coal burner so as to easily cause infringement to water-cooling wall in combustion process；
Its reason is that the temperature of pulverized coal particle is higher, and flow velocity is fast, and water-cooling wall is formed when passing through water-cooling wall and washed away, so as to notable
Reduce the service life of burner water-cooling wall.
In addition, the spout of existing burner adds the steady structure for firing tooth to solve water cooling using side wind (coming from First air)
The problem of wall brush wall, on the one hand, side wind is formed to water-cooling wall and protected, and on the other hand, the steady tooth that fires can effectively ensure burning
It is stable, still, because burner nozzle is in hot environment, and contain substantial amounts of coal dust in First air, steady combustion tooth is formed
Wash away for a long time, reduce the life-span of burner.
In addition, original boiler of power plant, has typically only taken into account the thermal efficiency of boiler, the row of nitrogen oxides is not considered
Put, while boiler thermal output is ensured, cause the initial ejection excessive concentration of nitrogen oxides.Coal dust pot in actual moving process
The nitrogen oxides initial concentration of stove is in 800mg/Nm3Left and right.It is necessary to design a kind of new low nitrogen burning for being used for stable burning
Device device and method is to reduce the concentration of emission of nitrogen oxides.Low NO refers to the concentration of nitrogen oxides in 500mg/Nm3
Below.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of low NO device for being used for stable burning and burning
Control method, this, which is used for the low NO device of stable burning and method for controlling combustion, can effectively avoid coal dust to burner water
The brush wall phenomenon of cold wall, ensure the stable burning of coal dust in the burner.
The technical solution of invention is as follows：
A kind of stable low NO device to burn that is used for for burner, including main air duct and circumference air channel；It is main
The outlet in air channel and circumference air channel is connected with the spout of burner；Circumference air channel is located at the surrounding of main air duct leading portion, leading portion
Refer to that section close to spout, i.e. right section in Fig. 1.
The cross section of main air duct is square；The cross section in circumference air channel is three-back-shaped.
The opposite sides in circumference air channel is provided with multi-disc surrounding air spinning disk；
Cannot the left and right sides set surrounding air spinning disk because the surrounding air of both sides to ensure First air can not brush wall,
Extend the service life of water-cooling wall, reduce the coking and slagging phenomenon in boiler combustion process.
The surface of surrounding air spinning disk is plane or curved surface；When the surface of wind spinning disk is plane, surrounding air spinning disk is equal
It is in tilted layout relative to the normal direction of spout plane.
When the surface of surrounding air spinning disk is plane, the multi-disc surrounding air spinning disk positioned at the same side is arranged in parallel；First
The surrounding air spinning disk angle of inclination of side is a；The surrounding air spinning disk angle of inclination of second side is-a；A is 30-60 °.Preferred value
It is 45 °.
First side is upside, and the second side is downside；Circumference air channel includes surrounding air air compartment and circumference wind snout.
Main air duct includes deep or light deflection section, deep or light circumference section and the air-coal separating section docked successively；
Deep or light deflection section uses elbow structure.
Air-coal separating intersegmental part sets venetian blind type separate blade.
The exit of main air duct is provided with waveform bluff body.
A kind of method for controlling combustion for burner, double flow patterns are used to supply coal dust for coal burner；
(1) deep or light deflection section is set to be saved with deep or light circumference in main air duct；
Deep or light deflection section uses elbow structure, is easy to coal dust to form first time air-coal separating under the influence of centrifugal force；
Venetian blind type separate blade is set in air-coal separating section, is easy to the further air-coal separating of coal dust；
The exit of main air duct is provided with waveform bluff body, is easy to separate coal dust in nozzle；
(2) circumference air channel is set on the outside of main air duct；
Disturbance in the Secondary Air increase First air combustion process passed through from circumference air channel, improves coal dust in burner
Combustion stability.
The opposite sides in circumference air channel is provided with multi-disc surrounding air spinning disk；
The surface of surrounding air spinning disk is plane or curved surface；When the surface of wind spinning disk is plane, surrounding air spinning disk is equal
It is in tilted layout relative to the normal direction of spout plane；
When the surface of surrounding air spinning disk is plane, the multi-disc surrounding air spinning disk positioned at the same side is arranged in parallel；First
The surrounding air spinning disk angle of inclination of side is a；The surrounding air spinning disk angle of inclination of second side is-a；A is 30-60 °；
First side is upside, and the second side is downside.
Circumference air channel includes surrounding air air compartment and circumference wind snout, and surrounding air is derived from the Secondary Air in boiler combustion system,
The effect of air compartment is primarily used to balance blast, ensures that the outlet blast of every side of surrounding air is consistent.
Deep or light deflection section is connected with deep or light circumference section, and deep or light circumference section is connected with air-coal separating section, air-coal separating section
Outlet be connected with deep or light spout, burner apparatus outside set circumference wind system.
Coal dust realizes first time air-coal separating under the influence of centrifugal force；
Deep or light deflection section material is abrasion resistant cast steel material or carbon steel structure wear-resistant ceramic of lining.
Deep or light circumference section uses abrasion resistant cast steel material.
Air-coal separating intersegmental part sets venetian blind type separate blade, passes through the collision of coal dust and separate blade so that coal dust
Air-coal separating again is realized in separator.
Air-coal separating section uses abrasion resistant cast steel material.
Deep or light spout is made up of a dense wind snout, a light wind snout.
Deep or light spout entirety material uses：Abrasion resistant cast steel.
Circumference wind system is set in the outside of burner apparatus, for introducing surrounding air, ensures the stabilization of boiler combustion, is prevented
Only coal dust brush wall, phenomena such as avoiding water-cooling wall coking and slagging.
Circumference air channel includes surrounding air air compartment and circumference wind snout two parts；
The upper and lower sides of circumference wind snout set spinning disk, form vortex gas-flow, strengthen the disturbance of First air, steady so as to reach
The effect of combustion；
Circumference wind snout entirety material uses：Abrasion resistant cast steel.
The deep or light deflection section of low NO is connected with primary air duct, and under the influence of centrifugal force, First air is deep or light
Deflection section realizes that coal dust separates with the first time of air, and airflow direction is horizontally oriented, can be by left-to-right also by right to a left side；It is dense
Light deflection section is connected by deep or light circumference section with air-coal separating section；The inside of air-coal separating section sets venetian blind type separate blade
(concrete structure of venetian blind type separate blade is rectangular alloy iron block, is arranged according to shown in Fig. 1 in different angle,
Separation principle is the collision by different angle, and the running track of coal dust is changed, and the running track of air keeps constant,
So as to form air-coal separating.) in the presence of separate blade, coal dust and air carry out second and separated First air；Coal dust is concentrated
To side, dense side is formed, opposite side is light side；The First air of dense side and light side has respectively entered deep or light spout (deep or light spout water
Plain cloth is put, can left and right arrangement also right left arrangement), and then burner hearth is sprayed into, coal dust firing region forms rich coal anoxic in burner hearth
Combustion zone and oxygen-enriched scarce coal combustion region, the peak temperature of boiler combustion is reduced, the initial of nitrogen oxides is reduced so as to reach
The effect of concentration, reduce the reducing agent consumption indicators of follow-up flue gas denitrification system.Rich coal anoxycausis region coal dust not exclusively fires
Burn, caused heat substantially reduces, and in oxygen-enriched scarce coal combustion region lacking due to fuel, so as to burn, caused heat is also big
It is big to reduce, it is finally reached the purpose for reducing boiler combustion peak value.That mainly reduce is the NOx of heating power type, reduces principle and refers to nitrogen
The mechanism of production of oxide.
The mechanism of production of nitrogen oxides
In nitrogen oxides, NO occupies more than 90%, and nitrogen dioxide accounts for 5% or so, and mechanism of production is generally divided into following three
Kind：
(1) thermal NO x
During burning, nitrogen aoxidizes generation at high temperature in air, and generating process therein is a non-limbed chain reaction.Its
Formation mechanism can use strange (Zeldovich) reaction equation of multidimensional in victory to represent.
With reaction temperature T rise, its reaction rate is exponentially.As 1500 DEG C of T ＜, the generation of thermal NO
Amount is seldom, and as 1500 DEG C of T ＞, T often increases by 100 DEG C, and reaction rate increases 6~7 times.
Thermal NO formation mechanism (Zeldovich reaction equations)
O2+N→2O+N
O+N2→NO+N
N+O2→NO+O
Total production is at high temperature
O2+N2→2NO
NO+1/2O2→NO2
(2) transient response type (Quick-type) NOx
Quick-type NOx is that Fenimore in 1971 is found through experiments that.Burnt in hydrocarbon fuels in fuel mistake
When dense, NOx can be quickly generated near reaction zone.
Because the CH free radicals that hydrocarbon pyrolytic generates in fuel volatile matter can react with nitrogen in air
Generate HCN and N, further with oxygen effect generate at a terrific speed, its formed time only need 60ms, generated with
The power of furnace pressure 0.5 is directly proportional, little with the relation of temperature.
Above two nitrogen oxides does not account for NOx major part, is not main source.
(3) fuel type NOx
Aoxidized and formed in burning by nitrogen compound in fuel.Because the heat decomposition temperature of nitrogen in fuel is less than coal dust firing
Temperature, fuel type will be generated at 600~800 DEG C, it accounts for 60-80% in coal dust firing NOx production.
It is that the organic compound thermal cracking containing nitrogen produces N, CN, HCN and NH3 first during fuel type NOx is generated
Deng intermediate product group, NOx is then reoxidised into.Because burning of coal process is by fugitive constituent burning and coke two stages of burning
Composition, therefore the NOx of fuel type is formed also by the oxidation (coke) two of residual nitrogen in the oxidation (fugitive constituent) of gas phase nitrogen and coke
It is grouped into.
Circumference wind system is set in the outside of burner, is connected with the Secondary Air of steam generator system, Secondary Air passes through surrounding air
Room, into circumference wind snout, surrounding air strengthens the disturbance of First air in the presence of upper and lower sides spinning disk, so as to reach steady combustion
With combustion-supporting effect；The surrounding air of left and right sides can be effectively protected the water-cooling wall of boiler, avoid simultaneously in boiler normal combustion
Water-cooling wall coking and slagging.
Waveform bluff body plays a part of mainly realizing proper air-coal separating and the effect surely fired
Waveform bluff body is prior art, and main function is the effect realized proper air-coal separating and surely fired.
Beneficial effect：
The present invention's is used for the stable low NO device and method for controlling combustion to burn, can by introducing surrounding air
Coal dust is efficiently solved in original combustion burner combustion process to the brush wall phenomenon of boiler water wall, greatly reduces the knot of boiler
Close-burning slag, farthest ensure the normal combustion and the thermal efficiency of boiler；The spinning disk set on circumference wind snout, can more added with
Disturbance in the increase First air combustion process of effect, it can effectively improve the steady combustion characteristic of boiler.
The core of the present invention is that introducing Secondary Air forms surrounding air, while water-cooling wall is protected, solves well steady
This problem is fired, because side wind is derived from Secondary Air, pulverized coal particle is not contained in Secondary Air.Compared to side wind scheme have it is aobvious
The technique effect of work.
Circumference wind action：Surrounding air is Secondary Air, and temperature is relatively low, and 120 degrees centigrades, surrounding air blows to water-cooling wall
On, the protective effect to water-cooling wall can be played, avoids water cooling wall temperature too high；Other surrounding air is blown on water-cooling wall, is also acted as
Buffer action, coal dust is not easy to blow on water-cooling wall in First air；It finally can effectively avoid or weaken brush wall phenomenon.
The present apparatus is related to deep or light deflection section, deep or light circumference section, air-coal separating section, deep or light spout and five portions of circumference wind system
Point, between each several part and inside carries out scientific design and layout, forms simple and practical double air flow ducts.The burner apparatus energy
When realizing boiler combustion in First air coal powder light-dark separation, coal dust firing region forms rich coal anoxycausis region in burner hearth
With oxygen-enriched scarce coal combustion region, the peak temperature of boiler combustion is reduced, so as to reach the work for the initial concentration for reducing nitrogen oxides
With reducing the reducing agent consumption indicators of follow-up flue gas denitrification system, reduce the operating cost of denitrating system.The present apparatus is simple in construction
Practicality, ingenious in design, denitration effect is notable, and denitrating system operating cost is low, and system maintenance is simple, service life length.
The device while boiler thermal output is ensured, can reduce the nitrogen oxides initial concentration of boiler.
The characteristics of this low NO device is：It is simple in construction, ingenious in design, one-time investment is small, follow-up denitrating system
Operating cost is low, operation maintenance is simple.Service life is grown, more than 15 years.
By that using the present apparatus, with reference to after-flame wind system, can be reduced to the nitrogen oxides initial concentration of pulverized-coal fired boiler
350-400mg/Nm3.The reduction of nitrogen oxides initial concentration in boiler smoke, follow-up flue gas denitrification system reducing agent can be reduced
Consumption, so as to produce huge economic benefit, denitrating system operating cost is reduced, reduce denitrating system to existing boiler operatiopn
Influence.Both boiler thermal output is can guarantee that, it is anxious in current boiler combustion process that and can, which reduces boiler nitrogen oxides initial concentration,
Need to solve the problems, such as.
Light side spout and dense side spout are arranged for left and right.
Brief description of the drawings
Fig. 1 is the general structure schematic diagram (vertical view for being used for the stable low NO device to burn for burner
Figure)；
Fig. 2 is the spout structure schematic diagram for being used for the stable low NO device to burn for burner.
Label declaration：1：Waveform bluff body 2：Deep or light spout 3：Air-coal separating section 4：Circumference air channel 5：Venetian blind type separates
Blade 6：Deep or light circumference section 7：Deep or light deflection section 8：Light side spout 9：Surrounding air spinning disk 10：Dense side spout 11：Circumference
Wind snout.
Embodiment
For the ease of understanding the present invention, below in conjunction with Figure of description and preferred embodiment to invent herein do it is more complete
Face, meticulously describe, but protection scope of the present invention is not limited to specific examples below.
Unless otherwise defined, all technical terms used hereinafter are generally understood that implication phase with those skilled in the art
Together.Technical term used herein is intended merely to describe the purpose of specific embodiment, is not intended to the limitation present invention's
Protection domain.
Embodiment 1：
Fig. 1-2, a kind of stable low NO device to burn that is used for for burner, including main air duct and surrounding air
Road 4；The outlet of main air duct and circumference air channel is connected with the spout of burner；Circumference air channel is located at the four of main air duct leading portion
Week.
The cross section of main air duct is square；The cross section in circumference air channel is three-back-shaped.
The both sides up and down in circumference air channel are provided with multi-disc surrounding air spinning disk；Cannot left and right sides setting surrounding air eddy flow
Piece because the surrounding air of both sides to ensure First air can not brush wall, extend the service life of water-cooling wall, reduce boiler combustion process
In coking and slagging phenomenon；
The surface of surrounding air spinning disk is plane, and surrounding air spinning disk tilts cloth both with respect to the normal direction of spout plane
Put.
When the surface of surrounding air spinning disk is plane, the equidistant parallel cloth of multi-disc surrounding air spinning disk positioned at the same side
Put；The surrounding air spinning disk angle of inclination of first side is a；The surrounding air spinning disk angle of inclination of second side is-a；A is 30-
60°.Preferred value is 45 °.
First side is upside, and the second side is downside；Circumference air channel includes surrounding air air compartment and circumference wind snout.
Main air duct includes deep or light deflection section 7, deep or light circumference section 6 and the air-coal separating section 3 docked successively；
Deep or light deflection section uses elbow structure.
Air-coal separating intersegmental part sets venetian blind type separate blade 5.
The exit of main air duct is provided with waveform bluff body 1.
A kind of method for controlling combustion for burner, double flow patterns are used to supply coal dust for coal burner；
(1) deep or light deflection section is set to be saved with deep or light circumference in main air duct；
Deep or light deflection section uses elbow structure, is easy to coal dust to form first time air-coal separating under the influence of centrifugal force；
Venetian blind type separate blade is set in air-coal separating section, is easy to the further air-coal separating of coal dust；
The exit of main air duct is provided with waveform bluff body, is easy to separate coal dust in nozzle；Light side spout 8 is formed in nozzle
With dense side spout 10.
(2) circumference air channel is set on the outside of main air duct；
Disturbance in the Secondary Air increase First air combustion process passed through from circumference air channel, improves coal dust in burner
Combustion stability.
The both sides up and down in circumference air channel are provided with multi-disc surrounding air spinning disk；
The surface of surrounding air spinning disk is plane or curved surface；When the surface of wind spinning disk is plane, surrounding air spinning disk is equal
It is in tilted layout relative to the normal direction of spout plane；
When the surface of surrounding air spinning disk is plane, the multi-disc surrounding air spinning disk positioned at the same side is arranged in parallel；First
The surrounding air spinning disk angle of inclination of side is a；The surrounding air spinning disk angle of inclination of second side is-a；A is 30-60 °；Preferred value
For 45 °.
The deep or light deflection section of low NO is connected with primary air duct, and under the influence of centrifugal force, First air is deep or light
Deflection section realizes that coal dust separates with the first time of air；Deep or light deflection section is connected by deep or light circumference section with air-coal separating section；It is dense
The inside of light segregation section sets venetian blind type separate blade, and for First air in the presence of separate blade, coal dust and air carry out the
Secondary separation；Coal dust focuses on side, forms dense side, and opposite side is light side；The First air of dense side and light side has respectively entered dense
Light spout 2, and then burner hearth is sprayed into, coal dust firing region forms rich coal anoxycausis region and oxygen-enriched scarce coal combustion area in burner hearth
Domain, the peak temperature of boiler combustion is reduced, so as to have the function that to reduce the initial concentration of nitrogen oxides, reduce follow-up flue gas and take off
The reducing agent consumption indicators of nitre system, reduce the operating cost of denitrating system.
Circumference wind system is set in the outside of burner, is connected with the Secondary Air of steam generator system, Secondary Air passes through surrounding air
Room, into circumference wind snout 11, surrounding air strengthens the disturbance of First air in the presence of upper and lower sides spinning disk, steady so as to reach
The effect of combustion；The surrounding air of left and right sides can be effectively protected the water-cooling wall of boiler in boiler normal combustion, while avoid water cooling
Wall coking and slagging.
By the implementation of this patent product, the first of boiler nitrogen oxides can be reduced while boiler thermal output is ensured
Beginning concentration.Denitration in Boiler system one-time investment is small, follow-up denitrating system operating cost is low, operation maintenance is simple.Produce huge
Economic benefit.
Claims (9)
1. a kind of be used for the stable low NO device to burn for burner, it is characterised in that including main air duct and week
Boundary air channel；The outlet of main air duct and circumference air channel is connected with the spout of burner；Circumference air channel is located at main air duct leading portion
Surrounding；The cross section of main air duct is square；The cross section in circumference air channel is three-back-shaped, and the opposite sides in circumference air channel is provided with multi-disc
Surrounding air spinning disk, the first side are upside, and the second side is downside.
2. according to claim 1 be used for the stable low NO device to burn for burner, it is characterised in that
The surface of surrounding air spinning disk is plane or curved surface；When the surface of wind spinning disk is plane, surrounding air spinning disk is relative
It is in tilted layout in the normal direction of spout plane.
3. according to claim 2 be used for the stable low NO device to burn for burner, it is characterised in that
When the surface of surrounding air spinning disk is plane, the multi-disc surrounding air spinning disk positioned at the same side is arranged in parallel；The circumference of first side
Wind spinning disk angle of inclination is a；The surrounding air spinning disk angle of inclination of second side is-a；A is 30-60 °.
4. according to claim 3 be used for the stable low NO device to burn for burner, it is characterised in that
Circumference air channel includes surrounding air air compartment and circumference wind snout.
5. the low NO device for being used for stable burning for being used for burner according to claim any one of 1-4, its
It is characterised by, main air duct includes deep or light deflection section, deep or light circumference section and the air-coal separating section docked successively；
Deep or light deflection section uses elbow structure.
6. according to claim 5 be used for the stable low NO device to burn for burner, it is characterised in that
Air-coal separating intersegmental part sets venetian blind type separate blade.
7. according to claim 6 be used for the stable low NO device to burn for burner, it is characterised in that
The exit of main air duct is provided with waveform bluff body (1).
8. a kind of method for controlling combustion for burner, it is characterised in that use double flow patterns to be supplied for coal burner
Coal dust；
(1) deep or light deflection section is set to be saved with deep or light circumference in main air duct；
Deep or light deflection section uses elbow structure, is easy to coal dust to form first time air-coal separating under the influence of centrifugal force；
Venetian blind type separate blade is set in air-coal separating section, is easy to the further air-coal separating of coal dust；
The exit of main air duct is provided with waveform bluff body, is easy to separate coal dust in nozzle；
(2) circumference air channel is set on the outside of main air duct；
The opposite sides in circumference air channel is provided with multi-disc surrounding air spinning disk, and the first side is upside, and the second side is downside, from surrounding air
Disturbance in the Secondary Air increase First air combustion process that road passes through, improves combustion stability of the coal dust in burner.
9. the method for controlling combustion according to claim 8 for burner, it is characterised in that
The surface of surrounding air spinning disk is plane or curved surface；When the surface of wind spinning disk is plane, surrounding air spinning disk is relative
It is in tilted layout in the normal direction of spout plane；
When the surface of surrounding air spinning disk is plane, the multi-disc surrounding air spinning disk positioned at the same side is arranged in parallel；First side
Surrounding air spinning disk angle of inclination is a；The surrounding air spinning disk angle of inclination of second side is-a；A is 30-60 °.
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| CN112413562A (en) * | 2020-10-28 | 2021-02-26 | 重庆富燃科技股份有限公司 | Device and method for protecting water-cooled wall of boiler by introducing flue gas at tail of boiler |
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| US4431403A (en) * | 1981-04-23 | 1984-02-14 | Hauck Manufacturing Company | Burner and method |
| CN101865461B (en) * | 2010-06-08 | 2014-06-04 | 上海市特种设备监督检验技术研究院 | Adjustable center feeding rotational flow coal dust shade burner |
| CN103062773B (en) * | 2012-12-25 | 2015-10-28 | 杭州全合科技有限公司 | Be applicable to the dual burner of high-temperature fuel gas and heavy oil |
| CN103953924B (en) * | 2014-04-22 | 2017-01-04 | 东方电气集团东方锅炉股份有限公司 | Combustor for boiler |
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