CN102494333B - Anthracite-combusted single fire ball four-corner direct current burner - Google Patents
Anthracite-combusted single fire ball four-corner direct current burner Download PDFInfo
- Publication number
- CN102494333B CN102494333B CN201110358272.5A CN201110358272A CN102494333B CN 102494333 B CN102494333 B CN 102494333B CN 201110358272 A CN201110358272 A CN 201110358272A CN 102494333 B CN102494333 B CN 102494333B
- Authority
- CN
- China
- Prior art keywords
- burner
- coal
- wind
- burners
- group
- 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
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K3/00—Feeding or distributing of lump or pulverulent fuel to combustion apparatus
-
- 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
- F23C5/28—Disposition of burners to obtain flames in opposing directions, e.g. impacting flames
-
- 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
- F23C5/24—Disposition of burners to obtain a loop flame
-
- 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
- F23C5/32—Disposition of burners to obtain rotating flames, i.e. flames moving helically or spirally
-
- 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
- F23C6/00—Combustion apparatus characterised by the combination of two or more combustion chambers or combustion zones, e.g. for staged combustion
- F23C6/04—Combustion apparatus characterised by the combination of two or more combustion chambers or combustion zones, e.g. for staged combustion in series connection
- F23C6/045—Combustion apparatus characterised by the combination of two or more combustion chambers or combustion zones, e.g. for staged combustion in series connection with staged combustion in a single enclosure
- F23C6/047—Combustion apparatus characterised by the combination of two or more combustion chambers or combustion zones, e.g. for staged combustion in series connection with staged combustion in a single enclosure with fuel supply in stages
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D1/00—Burners for combustion of pulverulent fuel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D1/00—Burners for combustion of pulverulent fuel
- F23D1/005—Burners for combustion of pulverulent fuel burning a mixture of pulverulent fuel delivered as a slurry, i.e. comprising a carrying liquid
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K1/00—Preparation of lump or pulverulent fuel in readiness for delivery to combustion apparatus
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K3/00—Feeding or distributing of lump or pulverulent fuel to combustion apparatus
- F23K3/02—Pneumatic feeding arrangements, i.e. by air blast
-
- 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
- F23C2201/00—Staged combustion
- F23C2201/10—Furnace staging
- F23C2201/101—Furnace staging in vertical direction, e.g. alternating lean and rich zones
-
- 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
- F23C2201/00—Staged combustion
- F23C2201/20—Burner staging
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D23/00—Assemblies of two or more burners
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K2201/00—Pretreatment of solid fuel
- F23K2201/10—Pulverizing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K2201/00—Pretreatment of solid fuel
- F23K2201/30—Separating
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23K—FEEDING FUEL TO COMBUSTION APPARATUS
- F23K2203/00—Feeding arrangements
- F23K2203/10—Supply line fittings
- F23K2203/105—Flow splitting devices to feed a plurality of burners
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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
An anthracite-combusted single fire ball four-corner direct current burner includes four burner groups placed at the four corners at a hearth and at least one coal pulverizer, wherein the pulverized coal airflow sprayed by the burner groups forms an imaginary tangent circle at the center of the hearth; two groups of burners are vertically arranged at each burner group at intervals; four pulverized coal pipelines are arranged at the outlet of each coal pulverizer and are connected to four concentrated/thin pulverized coal separators correspondingly; the separated four ways of concentrated pulverized coal airflow is transferred to four primary air/concentrated pulverized coal nozzles on the same horizontal plane and at the lower parts of the four corners of the hearth; and the separated four ways of thin pulverized coal airflow is transferred to four primary air/thin pulverized coal nozzles on the same horizontal plane and at the upper parts of the four corners of the hearth. Under the premise of meeting the heat power of the entire boiler, the anthracite-combusted single fire ball four-corner direct current burner increases the pulverized coal concentration at the concentrated pulverized coal area, and enables the wall thermal load qHr at the lower part of the burner to be higher, thereby enabling the combustion temperature at the lower part of the burner to meet the requirement of inflammation and stable combustion for the anthracite, and guaranteeing the anthracite pulverized coal airflow to be combusted timely and the low-load stable combustion of the oilless boiler.
Description
Technical field
The present invention relates to a kind of coal powder burner, particularly one uses four jiaos of DC burners of anthracitic single fireball.
Background technology
The explored coal reserves of China is about 6,400 hundred million tons, and wherein low-grade anthracite coal accounts for 14.6% of coal gross reserves.Power plants uses anthracite and accounts for 3% of coal for power generation total amount, and this numeral is also increasing.Anthracitic volatile content is low, and hydrogen content is low, and ignition temperature is high, and flame propagation velocity is slower, organizes badly as burning, low load combustion easily occurs unstable, easily flame-out situation of boiler high load capacity when ature of coal variation, and efficiency of combustion is general also lower.
Use at present anthracite both at home and abroad and generally adopt W flame boiler, tangentially fired boiler, and opposed firing swirl flow combustion boiler.W flame boiler heap(ed) capacity is 600MW grade, and tangentially fired boiler and opposed firing swirl flow combustion boiler heap(ed) capacity are 300MW grade, also do not have the design and running achievement of 600MW and four jiaos of Tangential Anthracite boilers of above grade.
Anthracitic boiler specially burns since design at the beginning of the seventies, manufacture in station boiler manufacturing firm of China.Along with unit capacity develops into 600MW～1300MW grade, the burner hearth thermal parameter of boiler has larger variation compared with the anthracite-fired boiler of 125MW, 300MW grade.First be furnace volume heat release rate q
vreduce, coal dust time of staying in burner hearth extends, and is conducive to anthracitic after-flame.But burner region wall thermic load q simultaneously
hrreduce, although section thermic load q
fraise to some extent, but the caloric receptivity of total burner region water-cooling wall increases, causes the temperature levels of burner region to decline, to anthracitic timely, stable ignition is unfavorable.Particularly capacity is increased to after 800MW～1300MW grade, owing to being subject to the restriction of single coal nozzle thermal power, the quantity of the coal nozzle that separate unit coal pulverizer is corresponding need to increase by 50% to 100% with respect to 300MW～600MW boiler, is increased to 6 or 8 by 4.Therefore, for example, concerning 1000MW ultra-supercritical boiler, be equipped with in 6 medium-speed pulverizers or double inlet and outlet coal mill situation, the quantity of the coal nozzle that separate unit coal pulverizer is corresponding is 8, and the quantity of total coal nozzle reaches 48.In the situation that adopting DC burner quadrangle tangential circle to arrange, the quantity of the wind coal nozzle in single angle is 12, add burner and be divided in vertical direction 2 to 3 groups, cause like this spacing of 2 the wind coal nozzles in burner highest and lowest larger, burner region wall thermic load q
hrlower, this zonal combustion temperature is lower, be unfavorable for anchracite duff air-flow in time, stable ignition and boiler do not throw oily low-load combustion-stabilizing.
Taking the 1000MW ultra supercritical tower boiler shown in Fig. 1 and Fig. 2 as example, existing burner circle of contact arrangement is described, the II-II cutaway view that Fig. 2 is Fig. 1, the I-I cutaway view that Fig. 1 is Fig. 2.This kind of burner comprises a boiler body 1 ', for it has configured six coal pulverizers 3 ', is numbered respectively A, B, C, D, E, F.The burner hearth 2 ' of boiler is surrounded by four sides water-cooling wall 9 ', is furnished with separately a sets of burners on each angle of this burner hearth 2 ', and the wind powder ejecting via the sets of burners on these four angles is formed centrally an imaginary circle 11 ' in burner hearth 2 '.
Each sets of burners comprise again vertically, keep at a certain distance away arrange three groups of burners 10 '.Every group of burner 10 ' further comprises four wind coal nozzles 6 ' and six overfire air jets 8 ', and those nozzles cooperatively interact, and formed two adjacent burner parts.Wherein three overfire air jets 8 ' and two wind coal nozzles 6 ' are a burner part, and these two wind coal nozzles 6 ' are arranged between these three overfire air jets 8 '; Those nozzles have in addition formed another burner part with identical arrangement.That is to say, on each angle of burner hearth 2 ', be vertically furnished with 18 overfire air jets 8 ' and 12 wind coal nozzles 6 '.For example, by being positioned at 12 wind coal nozzles 6 ' of 1 bugle, be numbered A1-1 from bottom to top, A1-2, B1-1, B1-2, C1-1, C1-2, D1-1, D1-2, E1-1, E1-2, F1-1, F1-2; 12 wind coal nozzles 6 ' on 4 bugles are numbered to A4-1, and A4-2 is to F4-1, F4-2.The method for numbering serial of other angle top nozzles is similar with it.
In addition, the outlet of every coal pulverizer 3 ' is provided with four pulverized coal channels 5 ', on the same angle of every pulverized coal channel 5 ' by a pulverized coal distributor 4 ' and burner hearth 2 ', two corresponding connections of a wind coal nozzle 6 ' of same burner part.For example, be numbered on the coal pulverizer 3 ' and 2 ' four angles of burner hearth of A, be numbered A1-1 and A1-2, A2-1 and A2-2, A3-1 and A3-2, eight described wind coal nozzles 6 ' of A4-1 and A4-2 connect.That is to say, after six each own pulverized coal channels 5 ' of coal pulverizer 3 ' connect pulverized coal distributor 4 ', be divided into two-way, correspondence is connected to 12 wind coal nozzles 6 ' on the each angle of burner hearth 2 '.For example, on 1 bugle, a wind coal nozzle of numbering A1-1 and A1-2 connects wherein pulverized coal channel 5 ' and the pulverized coal distributor 4 ' thereof of A coal pulverizer 3 '; Wherein wind coal nozzle of numbering B1-1 and B1-2 connects pulverized coal channel 5 ' and the pulverized coal distributor 4 ' thereof of B coal pulverizer 3 ', and other nozzles are connected similar with it with the pairing of coal pulverizer.But this arrangement makes the spacing of nozzle larger, cause burner region wall thermic load q
hrlower, can not adapt to the requirement of anthracite combustion.
Domestic a large amount of 50MW, the 125MW successfully having put into operation and 300MW anthracite-fired boiler, almost all adopt above-mentioned intermediate storage to heat wind powder feed system, this system primary wind and powder mixing temperature can be up to 220～250 ° of C, a wind ratio 14～15%, and the weary gas that contains moisture content can be separated from a wind, send into burner hearth from burner top, thereby reduce coal powder ignition heat, adopting intermediate storage to heat wind powder feed system, is on 50～300MW boiler, successfully to use anthracitic key.But heat wind powder feed system for intermediate storage, because the domestic Ball Mill maximum of exerting oneself is about 50t/h, to 600MW and above unit, every stove will be arranged 6～8 mills, and this system itself is comparatively complicated, adds huge Pulverized Coal Bin, make comparatively difficulty of designing institute's design arrangement, take up an area also larger.Therefore increase to after 600MW general this system that just no longer adopts in unit capacity.
Summary of the invention
Content of the present invention is to provide one and uses four jiaos of DC burners of anthracitic single fireball, by changing the apart arrangement form of coal powder light-dark, meeting under the prerequisite of whole boiler hot power, increasing the coal powder density in thick coal culm region, making lower burner region wall thermic load q
hrhigher, thus make this zonal combustion temperature can reach the requirement of the steady combustion of anthracite ignition, ensure anchracite duff air-flow catch fire in time and boiler is not thrown oily low-load combustion-stabilizing.
In order to achieve the above object, technical scheme of the present invention is to provide one and uses four jiaos of DC burners of anthracitic single fireball, and it comprises:
A boiler body, its burner hearth is surrounded by four sides water-cooling wall; The position that described water-cooling wall intersects between two forms four angles of the described burner hearth in position;
Four sets of burners, correspondence is arranged on four angles of described burner hearth; The breeze airflow ejecting via the sets of burners on described four angles is formed centrally an imaginary circle in this burner hearth;
Each sets of burners also in vertical direction, is furnished with two groups of burners with interval:
First group of burner is wind/thick coal culm burner, and it is in the bottom of described burner hearth; Described first group of burner sends thick coal culm air-flow to the bottom in burner hearth, thereby forms a thick coal culm combustion zone in this position of burner hearth;
Second group of burner is wind/thin powdered coal burner, and it is in the top of described burner hearth, and is positioned at the top of described first group of burner; Described second group of burner sends thin powdered coal air-flow to the top in described burner hearth, thereby forms a thin powdered coal combustion zone in this position of described burner hearth.
Described first group of burner in vertical direction, further includes multiple overfire air jets and multiple wind/thick coal culm nozzle, makes to be arranged between those overfire air jets corresponding interting of wind/thick coal culm nozzle described in each.
Described second group of burner in vertical direction, further includes multiple overfire air jets and multiple wind/thin powdered coal nozzle, makes to be arranged between those overfire air jets corresponding interting of wind/thin powdered coal nozzle described in each.
Preferably, described first group of burner comprises seven overfire air jets and six wind/thick coal culm nozzles; Described second group of burner comprises other seven overfire air jets and six wind/thin powdered coal nozzles.
Described four jiaos of DC burners, also include at least one coal pulverizer;
The outlet of every described coal pulverizer is provided with four pulverized coal channels; Every pulverized coal channel is connected to a dense-and-weak separator, by described dense-and-weak separator, a wind/breeze airflow is carried out to deep or light separating treatment;
The deep or light different two-way air-flow of same described dense-and-weak separator output, is transported to respectively on the first group of burner and second group of burner on the same angle of described burner hearth;
Wherein a road thick coal culm air-flow is transported to one of them wind/thick coal culm nozzle of described first group of burner; Another road thin powdered coal air-flow is transported to one of them wind/thin powdered coal nozzle of described second group of burner.
From same described coal pulverizer output, and separated respectively and formed Si road thick coal culm air-flow by four dense-and-weak separators, correspondence is delivered to four wind/thick coal culm nozzles that are positioned at same level on four angles of described burner hearth;
Separate and form Si road thin powdered coal air-flow, correspondence exports four wind/thin powdered coal nozzles that are positioned at same level on four angles of described burner hearth to.
Thick coal culm air-flow described in each road, comprises from a described wind/breeze airflow isolated 80% coal dust and 50% a wind;
Thin powdered coal air-flow described in each road, comprises from a described wind/breeze airflow remaining 20% coal dust and 50% a wind;
Each nozzle of described four jiaos of DC burners is provided with surrounding air around; Secondary Air is set to the wind of setovering.
In the vertical direction of described burner hearth, the spacing of uppermost wind/thin powdered coal nozzle and nethermost wind/thick coal culm nozzle, is controlled by the spacing of first group of burner and second group of burner on each angle of described burner hearth.
Compared with prior art, the four jiaos of DC burners of anthracitic single fireball that use of the present invention, its advantage is:
1, the present invention is by adopting " medium-speed pulverizer with coal powder light-dark separation device or the unit pulverized-coal system that goes with each other all the time ", and the upper and lower in burner hearth has formed the combustion zone of thin powdered coal and thick coal culm respectively.Thereby, the wind powder that makes a wind/thick coal culm wherein than and a wind ratio, be all better than the relevant parameter while using intermediate storage to heat wind powder feed system in prior art.Simultaneously, 50% wind that contains half moisture content is separated, send into burner hearth from wind/thin powdered coal nozzle on burner top, although the mixing temperature of primary wind and powder, than adopting intermediate storage to heat low, the such design of mixing temperature of the primary wind and powder of wind powder feed system, calculate known by theory, compared with heating wind powder feed system with employing intermediate storage, the ignition heat of (dense) breeze airflow is basic the same, thereby has ensured the stable ignition of thick coal culm air-flow.
2, the present invention is by making the breeze airflow of every coal pulverizer outlet, with one deck totally 4 wind/thick coal culm nozzles, and one deck totally 4 corresponding arrangements that connect of a light wind/coal nozzle, can meet under the prerequisite of whole boiler hot power, increase the coal powder density in thick coal culm region, the now combustion zone wall thermic load q of bottom
hrhigher, make this zonal combustion temperature can reach the requirement of the steady combustion of anthracite ignition, ensure anchracite duff air-flow catch fire in time and boiler is not thrown oily low-load combustion-stabilizing.
3, the spacing control of the uppermost wind/thin powdered coal nozzle of burner and nethermost wind/thick coal culm nozzle is in the preferred range time, can meet equally a uppermost wind thin powdered coal nozzle under the prerequisite of furnace outlet screen end spacing and anthracite combustion efficiency, the discharge capacity of boiler nitrogen oxide is reduced.
4, four groups of burner arrangement are on four angles of boiler four sides water-cooling wall, surrounding at each coal nozzle arranges surrounding air, Secondary Air arranges biasing wind, form the burning form of " bellows chamber powder ", therefore, the phenomenon that is not easy to occur a wind coal dust subsides wall, is conducive to prevent Boiler Furnace slagging and high temperature corrosion, also better to the adaptability of coal type change.
Brief description of the drawings
Fig. 1, Fig. 2 are respectively plane and the elevation of existing burner, wherein, Fig. 1 be Fig. 2 I-I to cutaway view, Fig. 2 be Fig. 1 II-II to cutaway view;
Fig. 3 is the medium-speed pulverizer with coal powder light-dark separation device that uses in the present invention or the operation principle schematic diagram of the unit pulverized-coal system that goes with each other all the time;
Fig. 4, Fig. 5 are respectively plane and the elevation that uses four jiaos of DC burners of anthracitic single fireball of the present invention, and show the apart arrangement form of coal powder light-dark in this burner; Fig. 4 be Fig. 5 I-I to cutaway view, Fig. 5 be Fig. 4 II-II to cutaway view.
Detailed description of the invention
Below in conjunction with brief description of the drawings the specific embodiment of the present invention.
Shown in Figure 3, the four jiaos of DC burners of anthracitic single fireball that use of the present invention, adopt " medium-speed pulverizer with coal powder light-dark separation device or the unit pulverized-coal system that goes with each other all the time ", its cardinal principle is on the every pulverized coal channel 50 exporting at coal pulverizer 30, increase a coal powder light-dark separation device 40, a wind/coal dust is carried out to deep or light separation, be divided into " dense " breeze airflow of road 80% coal dust and 50% wind, " light " breeze airflow of remaining 20% coal dust in He Yi road and 50% wind, these two strands of breeze airflows are respectively by " a wind/thick coal culm " nozzle 60 and " a wind/thin powdered coal " nozzle 70 of burner, send into the 22 tissue burnings of 21He Dan combustion zone, the interior corresponding dense combustion zone of burner hearth 20.
Below with reference to Fig. 4, Fig. 5, the concrete structure of four jiaos of DC burners of anthracitic single fireball and the apart arrangement form of each bias pulverized coal wherein of using of the present invention is described, wherein Fig. 4 be Fig. 5 I-I to cutaway view, Fig. 5 be Fig. 4 II-II to cutaway view.
Described four jiaos of DC burners comprise a boiler body 1, for it disposes six coal pulverizers 3, are numbered respectively A, B, C, D, E, F.The burner hearth 2 of this boiler is surrounded by four sides water-cooling wall 9, is furnished with separately a sets of burners on each angle of burner hearth 2, and the breeze airflow ejecting via the sets of burners on these four angles is formed centrally an imaginary circle 11 in burner hearth 2.For convenience of description, hereinafter adjacent two water-cooling wall 9 sides are intersected in the angle forming, that angle that is positioned at the lower left corner shown in Fig. 4 is called 1 bugle, to sort clockwise, other angles is called to 2 bugles successively to 4 bugles.
Each sets of burners in vertical direction, is furnished with two groups of burners with interval.First group of burner is called " a wind/thick coal culm " burner, and it is positioned at lower furnace portion, and further includes seven overfire air jets 8, and interspersed six wind/thick coal culm nozzles 6 that are arranged between those overfire air jets 8.Second group of burner is called " a wind/thin powdered coal " burner, and it is positioned at the top of first group of burner, and further includes other seven overfire air jets 8, and interspersed six wind/thin powdered coal nozzles 7 that are arranged between those overfire air jets 8.
For convenience of description, will be arranged in first group of burner of 1 bugle bottom, six wind/thick coal culm nozzles 6 are numbered A1-1, B1-1, C1-1, D1-1, E1-1, F1-1; To be arranged in second group of burner on 1 bugle top, six wind/thin powdered coal nozzles 7 are numbered A1-2, B1-2, C1-2, D1-2, E1-2, F1-2.And by six in first group of burner on 4 bugles wind/thick coal culm nozzles 6, be numbered A4-1 ~ F4-1; By six in second group of burner on 4 bugles wind/thin powdered coal nozzles 7, be numbered A4-2 ~ F4-2.On other angles of burner hearth 2, the nozzle of each group " a wind/thick coal culm " and " a wind/thin powdered coal ", is numbered in a similar manner.
The outlet of every coal pulverizer 3 is provided with four pulverized coal channels 5, and every pulverized coal channel 5 is by after a dense-and-weak separator 4, respectively with wind/thick coal culm nozzle 6 and a corresponding connection of wind/thin powdered coal nozzle 7 on the same angle of burner hearth 2.
For instance, be numbered the output of the coal pulverizer 3 of A, after four dense-and-weak separators 4 are processed, obtain two kinds of deep or light different Ge tetra-road breeze airflows.Wherein four road thick coal culm air-flows, respectively in the first burner of burner hearth 2 bottoms, and are numbered A1-1, A2-1, A3-1, the corresponding connection of four wind/thick coal culm nozzles 6 of A4-1, these four wind/thick coal culm nozzles 6 should be to be positioned in the same level of 2 four angle bottoms of burner hearth.Other four road thin powdered coal air-flows, respectively in second burner on burner hearth 2 tops, and are numbered A1-2, A2-2, A3-2, the corresponding connection of wind/thin powdered coal nozzle 7 of A4-2, these four wind/thin powdered coal nozzles 7 should be to be positioned in the same level on 2 four angle tops of burner hearth.The breeze airflow that the coal pulverizer 3 of other numberings is exported, with the annexation of each nozzle, similar with it; Relevant pulverized coal channel, dense-and-weak separator and the connecting line with nozzle thereof are omitted in the accompanying drawings.
Via above-mentioned apart arrangement, make in the output of each coal pulverizer 3, all isolated thick coal culm air-flows are all sent to the latter half in whole burner hearth 2, thereby have formed a thick coal culm combustion zone in this position; And isolated thin powdered coal air-flow can be sent to the first half in burner hearth 2, and form a thin powdered coal combustion zone in this position, met the system principle shown in Fig. 3.Therefore, can meet under the prerequisite of whole boiler hot power, increase the coal powder density in thick coal culm region, make lower burner region wall thermic load q
hrhigher, this zonal combustion temperature can reach the requirement of the steady combustion of anthracite ignition, ensure anchracite duff air-flow catch fire in time and boiler is not thrown oily low-load combustion-stabilizing.
Preferably, meet at the same time wind coal nozzle topmost and shield the spacing at the ends to burner hearth 2 outlets, and under the prerequisite of bituminous coal combustion efficiency, can set the spacing between first group and second group of burner on each angle, make the spacing of uppermost wind/thin powdered coal nozzle and nethermost wind/thick coal culm nozzle, be controlled in desirable scope, thereby can make the discharge capacity of the nitrogen oxide of boiler reduce.
In addition, the present invention is also on four angles of burner hearth 2, by the surrounding for each coal nozzle, surrounding air is set, Secondary Air arranges biasing wind, form the burning form of " bellows chamber powder ", thereby prevent the phenomenon generation that a time wind coal dust pastes wall, be conducive to prevent Boiler Furnace slagging and high temperature corrosion, also better to the adaptability of coal type change.
Although content of the present invention has been done detailed introduction by above preferred embodiment, will be appreciated that above-mentioned description should not be considered to limitation of the present invention.Read after foregoing those skilled in the art, for multiple amendment of the present invention and substitute will be all apparent.Therefore, protection scope of the present invention should be limited to the appended claims.
Claims (8)
1. use four jiaos of DC burners of anthracitic single fireball, it is characterized in that, comprise:
A boiler body (1), its burner hearth (2) is surrounded by four sides water-cooling wall (9); Described water-cooling wall (9) between two crossing position is formed as four angles of described burner hearth (2);
Four sets of burners, correspondence is arranged on four angles of described burner hearth (2); The breeze airflow ejecting via the sets of burners on described four angles is formed centrally an imaginary circle (11) in this burner hearth (2);
Each sets of burners also in vertical direction, is furnished with two groups of burners with interval:
First group of burner is wind/thick coal culm burner, and it is in the bottom of described burner hearth (2); Described first group of burner sends thick coal culm air-flow to the bottom in burner hearth (2), thereby forms a thick coal culm combustion zone in this position of burner hearth (2);
Second group of burner is wind/thin powdered coal burner, and it is in the top of described burner hearth (2), and is positioned at the top of described first group of burner; Described second group of burner sends thin powdered coal air-flow to the top in described burner hearth (2), thereby forms a thin powdered coal combustion zone in this position of described burner hearth (2).
2. use as claimed in claim 1 four jiaos of DC burners of anthracitic single fireball, it is characterized in that,
Described first group of burner in vertical direction, further include multiple overfire air jets (8) and multiple wind/thick coal culm nozzles (6), make to be arranged between described overfire air jet (8) corresponding interting of wind/thick coal culm nozzle (6) described in each.
3. use as claimed in claim 2 four jiaos of DC burners of anthracitic single fireball, it is characterized in that,
Described second group of burner in vertical direction, further include multiple overfire air jets (8) and multiple wind/thin powdered coal nozzles (7), make to be arranged between described overfire air jet (8) corresponding interting of wind/thin powdered coal nozzle (7) described in each.
4. use as claimed in claim 3 four jiaos of DC burners of anthracitic single fireball, it is characterized in that,
Described first group of burner comprises seven overfire air jets (8) and six wind/thick coal culm nozzles (6); Described second group of burner comprises other seven overfire air jets (8) and six wind/thin powdered coal nozzles (7).
5. as described in claim 3 or 4, use four jiaos of DC burners of anthracitic single fireball, it is characterized in that,
Described four jiaos of DC burners, also include at least one coal pulverizer (3);
The outlet of every described coal pulverizer (3) is provided with four pulverized coal channels (5); Every pulverized coal channel (5) is connected to a dense-and-weak separator (4), by described dense-and-weak separator (4), a wind/breeze airflow is carried out to deep or light separating treatment;
The different two-way air-flow of coal powder light-dark of same described dense-and-weak separator (4) output, is transported to respectively on the first group of burner and second group of burner on the same angle of described burner hearth (2);
Wherein a road thick coal culm air-flow is transported to one of them wind/thick coal culm nozzle (6) of described first group of burner; Another road thin powdered coal air-flow is transported to one of them wind/thin powdered coal nozzle (7) of described second group of burner.
6. use as claimed in claim 5 four jiaos of DC burners of anthracitic single fireball, it is characterized in that,
From same described coal pulverizer (3) output, and form Si road thick coal culm air-flow by the each self-separation of four dense-and-weak separators (4), correspondence is delivered to four the wind/thick coal culm nozzles (6) that are positioned at same level on (2) four angles of described burner hearth;
Separate and form Si road thin powdered coal air-flow, correspondence exports four the wind/thin powdered coal nozzles (7) that are positioned at same level on (2) four angles of described burner hearth to.
7. use as claimed in claim 6 four jiaos of DC burners of anthracitic single fireball, it is characterized in that,
Thick coal culm air-flow described in each road, comprises from a described wind/breeze airflow isolated 80% coal dust and 50% a wind;
Thin powdered coal air-flow described in each road, comprises from a described wind/breeze airflow remaining 20% coal dust and 50% a wind;
Each nozzle of described four jiaos of DC burners is provided with surrounding air around; Secondary Air is set to the wind of setovering.
8. as described in claim 3 or 4, use four jiaos of DC burners of anthracitic single fireball, it is characterized in that,
In the vertical direction of described burner hearth (2), the spacing of uppermost wind/thin powdered coal nozzle (7) and nethermost wind/thick coal culm nozzle (6), is controlled by the spacing of first group of burner and second group of burner on each angle of described burner hearth (2).
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110358272.5A CN102494333B (en) | 2011-11-14 | 2011-11-14 | Anthracite-combusted single fire ball four-corner direct current burner |
| ES201390040A ES2453392B1 (en) | 2011-11-14 | 2012-04-13 | A tangentially heated boiler of a single fireball for anthracite combustion. |
| PCT/CN2012/073968 WO2012159509A1 (en) | 2011-11-14 | 2012-04-13 | Single fireball quadrangle direct flow burner for combustion of anthracite coal |
| US13/845,001 US20140065561A1 (en) | 2011-11-14 | 2013-03-17 | Single-fireball tangentially-firing boiler for the burning of anthracite |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110358272.5A CN102494333B (en) | 2011-11-14 | 2011-11-14 | Anthracite-combusted single fire ball four-corner direct current burner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102494333A CN102494333A (en) | 2012-06-13 |
| CN102494333B true CN102494333B (en) | 2014-09-03 |
Family
ID=46186177
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110358272.5A Active CN102494333B (en) | 2011-11-14 | 2011-11-14 | Anthracite-combusted single fire ball four-corner direct current burner |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20140065561A1 (en) |
| CN (1) | CN102494333B (en) |
| ES (1) | ES2453392B1 (en) |
| WO (1) | WO2012159509A1 (en) |
Families Citing this family (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103090368B (en) * | 2013-02-20 | 2016-05-04 | 上海锅炉厂有限公司 | The anistree DC burner coal powder light-dark of two fireballs apart arrangement mode |
| PL2993400T3 (en) * | 2014-09-02 | 2020-05-18 | General Electric Technology Gmbh | A combustion system |
| CN104315531A (en) * | 2014-11-19 | 2015-01-28 | 中节环（北京）环境科技股份有限公司 | Separator arranged between pulverized coal feeder and combustor |
| CN106439889A (en) * | 2016-11-29 | 2017-02-22 | 广东电网有限责任公司电力科学研究院 | Anthracite large oxygen-enriched combustion system and method with novel direct blowing powder production device |
| CN106871110B (en) * | 2017-01-18 | 2019-01-22 | 上海发电设备成套设计研究院 | Low ignition heat ultra-low load steady for thermal power plant's unit pulverized-coal system fires system |
| CN106871114A (en) * | 2017-03-17 | 2017-06-20 | 北京科技大学 | A kind of many gradient burners of the high effect cleaning of coal and its application method |
| CN106871112A (en) * | 2017-04-07 | 2017-06-20 | 贵州电网有限责任公司电力科学研究院 | A kind of burner and coal pulverizer matching process for being punched circle combustion system station boiler |
| CN107606603A (en) * | 2017-10-09 | 2018-01-19 | 上海锅炉厂有限公司 | A kind of combustion system for the combustion of pulverized-coal fired boiler ultra-low load steady |
| CN109268870A (en) * | 2018-10-30 | 2019-01-25 | 苏州吉杰电力科技有限公司 | A kind of pulverized coal preparation system that flame kernel is controllable mill dislocation pulverized coal channel arragement construction |
| CN111947133B (en) * | 2020-08-31 | 2024-06-07 | 华北电力科学研究院有限责任公司 | Boiler and combustion system and use method thereof |
| CN111999429B (en) * | 2020-09-01 | 2022-06-21 | 中北大学 | Quasi-static simulator for high-temperature fireball |
| CN112555819B (en) * | 2020-11-18 | 2022-12-23 | 哈尔滨锅炉厂有限责任公司 | Tangential combustor arrangement mode for ultralow-load flexible peak regulation of boiler |
| CN113623642A (en) * | 2021-07-08 | 2021-11-09 | 中国大唐集团科学技术研究院有限公司西北电力试验研究院 | Wide-adaptability combustion system of boiler with tangential circles at four corners |
| CN113513767B (en) * | 2021-07-19 | 2023-07-28 | 国网天津市电力公司电力科学研究院 | Coal mill switching stable combustion device and method for deep peak shaving coal-fired unit |
Family Cites Families (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA1190093A (en) * | 1982-08-06 | 1985-07-09 | Ralph D. Winship | Method of reducing no.sub.x and so.sub.x emission |
| CN2105610U (en) * | 1991-07-05 | 1992-05-27 | 清华大学 | Coal powder sorting flow and burning device |
| FR2679980B1 (en) * | 1991-08-02 | 1997-11-14 | Stein Industrie | HEATING DEVICE FOR PULVERIZED COAL BOILERS USING TANGENTIAL HEATING FOR THE PURPOSE OF REDUCING EMISSIONS OF NITROGEN OXIDES. |
| US5315939A (en) * | 1993-05-13 | 1994-05-31 | Combustion Engineering, Inc. | Integrated low NOx tangential firing system |
| JPH10153302A (en) * | 1996-11-22 | 1998-06-09 | Ishikawajima Harima Heavy Ind Co Ltd | Coal fired boiler |
| CN1112537C (en) * | 1998-07-27 | 2003-06-25 | 三菱重工业株式会社 | Coal-powder combustor |
| CN1247934C (en) * | 2004-07-15 | 2006-03-29 | 浙江大学 | Method and system for reducing NO discharging by collecting and refiring fine coal powder in tertiary wind |
| CN200989589Y (en) * | 2006-08-29 | 2007-12-12 | 上海理工大学 | Gas refiring and double-path level thin and thick integrated low NOx burner |
| US20080053315A1 (en) * | 2006-09-05 | 2008-03-06 | Ray Nicholas | Grilling and cooking apparatus |
| US20080105176A1 (en) * | 2006-11-08 | 2008-05-08 | Electric Power Research Institute, Inc. | Staged-coal injection for boiler reliability and emissions reduction |
| US8210111B2 (en) * | 2008-02-27 | 2012-07-03 | C.L. Smith Industrial Company | Method and system for lining a coal burner nozzle |
| CN101315184B (en) * | 2008-06-17 | 2010-06-09 | 哈尔滨工业大学 | Wall type arranged horizontal rich-lean direct current combustion device |
| CN101569829B (en) * | 2009-06-05 | 2011-07-20 | 黄震 | Method for jointly controlling emission of NOx by utilizing multi-stage bias combustion and fuel reburning |
| CN201615487U (en) * | 2009-12-15 | 2010-10-27 | 李朝阳 | Combined vertical dense-dilute low-NOx direct flow pulverized coal burner |
| CN101737771B (en) * | 2009-12-18 | 2012-02-01 | 上海锅炉厂有限公司 | Multistage over fire air distributing mode |
| CN101709871B (en) * | 2009-12-25 | 2011-08-31 | 上海锅炉厂有限公司 | Hexagonal or octagonal tangential arrangement of anthracite burning single-fireball direct-flow combustors |
| CN201582812U (en) * | 2009-12-28 | 2010-09-15 | 清华大学 | Pulverized coal burner for oxygen-rich local combustion-supporting |
-
2011
- 2011-11-14 CN CN201110358272.5A patent/CN102494333B/en active Active
-
2012
- 2012-04-13 WO PCT/CN2012/073968 patent/WO2012159509A1/en active Application Filing
- 2012-04-13 ES ES201390040A patent/ES2453392B1/en active Active
-
2013
- 2013-03-17 US US13/845,001 patent/US20140065561A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| ES2453392A2 (en) | 2014-04-07 |
| WO2012159509A1 (en) | 2012-11-29 |
| US20140065561A1 (en) | 2014-03-06 |
| ES2453392R1 (en) | 2014-05-14 |
| ES2453392B1 (en) | 2015-01-27 |
| CN102494333A (en) | 2012-06-13 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102494333B (en) | Anthracite-combusted single fire ball four-corner direct current burner | |
| CN103090368B (en) | The anistree DC burner coal powder light-dark of two fireballs apart arrangement mode | |
| CN102563634B (en) | Coal dust thickness-thinness separating and distributing structure of single-fireball eight-corner direct-flow burner | |
| CN101709871B (en) | Hexagonal or octagonal tangential arrangement of anthracite burning single-fireball direct-flow combustors | |
| CN101737771B (en) | Multistage over fire air distributing mode | |
| CN207514895U (en) | For the combustion system of pulverized-coal fired boiler ultra-low load steady combustion | |
| CN105114944A (en) | Air staged-combustion vertical and horizontal combined arrangement type over fire air system for tangential boiler | |
| CN100516651C (en) | W flame boiler primary air waste-steam replacement method and apparatus for | |
| CN101135451A (en) | Gas recombustion and two-channel thick-light integrated type low NOx combusting device | |
| CN100532937C (en) | Turbulent burner for little oil quantity gasification and burning, lateral-igniting and central coal powder-feeding | |
| CN107606601A (en) | Burning method for organizing in a kind of opposed firing pulverized-coal fired boiler stove | |
| CN207279612U (en) | A kind of water-coal-slurry circulating fluidized bed boiler based on fluidised form reconstruct | |
| CN103697463B (en) | The burner of upper and lower deep or light First air centralized arrangement | |
| CN103206716A (en) | Multi-coal adaptive low NOxCombustion system | |
| CN112377894A (en) | Wind tangent circle pulverized coal combustion boiler | |
| CN205299497U (en) | Hierarchical sorting combustion system of circulating fluidized bed fuel thickness | |
| CN103104911A (en) | Three-stage overfire air arrangement mode | |
| CN206222303U (en) | A kind of ultralow NOX combustion systems of coal-burning boiler | |
| CN206398702U (en) | Burner region variable cross-section adapts to the Pulverized Coal fired Boiler Furnace of flexibility peak regulation | |
| CN214147857U (en) | Wind tangent circle pulverized coal combustion boiler | |
| CN205065702U (en) | After -flame wind device that combination of perpendicular level of circle of contact boiler air classification burning was arranged | |
| CN208794397U (en) | Overhead burner pulverized-coal fired boiler | |
| CN203628632U (en) | Upper and lower thick and thin primary air intensively arranged combustion device | |
| EP0017721B2 (en) | Low load coal bucket and method of operating a pulverised coal-fired furnace | |
| CN101709870B (en) | Hexagonal or octagonal tangential arrangement of fuel-oil or fuel-gas single-fireball direct-flow combustors |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |