CN103185338B - A kind of coal dust decoupling burning device of dense side classification and combustion method - Google Patents
A kind of coal dust decoupling burning device of dense side classification and combustion method Download PDFInfo
- Publication number
- CN103185338B CN103185338B CN201110455316.6A CN201110455316A CN103185338B CN 103185338 B CN103185338 B CN 103185338B CN 201110455316 A CN201110455316 A CN 201110455316A CN 103185338 B CN103185338 B CN 103185338B
- Authority
- CN
- China
- Prior art keywords
- flame holder
- spout
- powder flame
- collection powder
- powder
- 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.)
- Expired - Fee Related
Links
Abstract
The present invention relates to a kind of coal dust decoupling burning device and decoupling burning method of dense side classification.Described burner comprises spout (1) and a pair collection powder flame holder, the cross section of this pair collection powder flame holder rear end be by spout (1) edge to center diminishing step structure.The outstanding feature of coal dust decoupling burning device provided by the invention and combustion method: by collection powder flame holder to the local multi-stage PCE again of dense powder air-flow, can make local breeze airflow reach super dense concentrated effect.Because the combustion system ignited step by step from dense to light can produce the effect of decoupling burning, localized concentrations compares overall concentrated pressure drop and the wearing and tearing that can reduce whole system equipment.
Description
Technical field
The present invention relates to coal-dust combustion device field, particularly, the present invention relates to a kind of coal dust decoupling burning device of dense side classification.
Background technology
In the practical application of coal dust firing, along with the ignition temperature of coal air mixture at combustion phases and the raising of oxygen concentration, coal dust is quick, abundant after-flame more easily, and in flue gas, the content of fly ash combustible material (uncompleted burned carbon and CO) reduces; Meanwhile, the high-temperature oxygen-enriched NO that can make again to generate in combustion process
xsignificantly improve; On the other hand, coal air mixture suppresses nitrogen oxide NO in the ignition temperature of combustion phases and oxygen concentration more low being more conducive to
xgenerate, but coal dust more not easily after-flame.Thus, fly ash combustible material and the NO of coal dust firing is removed
xcoupling emission problem be long-standing technological difficulties in combustion technology.
At present, the low NO being applicable to pulverized coal firing boiler developed
xcombustion technology mainly contains air staged combustion technology etc.Due to aforesaid coupling discharge relation, conventional art often can only stress the solution of an aspect problem, not only can not deal with problems up hill and dale, also brings many other problems simultaneously.Such as macroscopical air staged combustion technology reduces NO
xefficiency lower, the stage of oxygen-enriched combusting also can be made to delay simultaneously, the coke of extremely difficult after-flame and semicoke are postponed till low-temperature burning district and are removed after-flame, cause the content of fly ash combustible material to increase, and in burner hearth on a large scale reducing atmosphere also make the high temperature corrosion probability of burner hearth coking and water-cooling wall greatly increase.
The mode of coal dust low NO many employings Pulverized Coal Concentration after-combustion of having developed at present, can reduce NO to a certain extent
xdischarge, but because thickening efficiency is not high, the A/C (ratio of air quality and quality of pc) of the thick coal culm air-flow after concentrated is how between 0.8 ~ 1.3, particularly for volatile matter lower than 10% ~ 20% coal, air capacity during this air-flow coal dust firing still higher than or close to the air capacity in coal needed for volatile combustion, the gas-phase reaction speed of volatile matter and oxygen, thus this burning condition will inevitably make a large amount of and combination with oxygen of nitrogen that in coal, pyrolysis goes out, changes into NO
x.The NO generated
xalthough by the supply process controlling air, make it to utilize semicoke to burn in reducing atmosphere and carry out partial reduction, the solid reaction rate restriction but this heterogeneous reaction is bullied, this stage is lower based on the reducing agent reactivity of C, CO etc., after air-flow enters furnace cavity expansion, reducing agent diffusion velocity and and NO
xcontact probability extremely low, thus in burner hearth, reduction reaction is difficult to fully complete, reduce NO
xthe efficiency of discharge is lower.
Burning Technique by Dispelling Coupling can realize the fly ash combustible material and the NO that remove coal burning
xcoupling discharge relation, be reduce fly ash combustible material and NO simultaneously
xthe effective ways of discharge.Its mechanism is: coal burning process is divided into two stages, the first stage, coal issues heat-dissipating solution, gasification and gas-fired in very high reducing atmosphere, makes full use of the pyrolysis of coal self and gasification product by fuel type NO
xbe converted into more stable N
2; Second stage is created high-temperature oxygen-enriched but is not produced thermal NO
xenvironment, then guarantee the abundant after-flame of coal.
As can be seen here, decoupling burning suppresses NO
xthe critical process of discharge, in the conversion process of the fugitive constituent nitrogen that burning initial stage pyrolytic gasification produces, the less spatial dimension of this process mainly before First air inside, Secondary Air mixing is carried out, namely the after-flame stage is started, the reducing atmosphere of burner hearth on a large scale not needing aforesaid Researched of Air Staging Combustion Burning Pulverized Coal to produce after First air mixes with Secondary Air.This process is the fractional combustion belonged on microcosmic, and just mechanism is different from aforesaid Researched of Air Staging Combustion Burning Pulverized Coal macroscopically, and the reducing agent of decoupling burning takes full advantage of pyrolytic gasification product, and reactivity is higher.At present, people reduce NO to decoupling burning
xmechanism conduct in-depth research, patent " low-nitrogen oxide discharging coal powder decoupling burning device and coal dust decoupling burning method " (Chinese invention patent application number: 201110033811.8) invented a kind of coal dust decoupling burning device and coal dust decoupling burning method, its Pulverized Coal Concentration is integrated structure with surely firing, although the combination property of Pulverized Coal Concentration and air-flow heating is better, but structure is comparatively complicated, manufacturing cost is higher.In addition, because Pulverized Coal Concentration is integrated on burner nozzle, make coal powder light-dark separating property unadjustable, thus can only be adapted to by designed in advance using Coal rank, thus flexibility is lower.
Summary of the invention
The object of the present invention is to provide a kind of coal dust decoupling burning device of dense side classification, this burner described not only can improve the effect of decoupling burning, and structure is also comparatively simple, can dock with any one Pulverized Coal Concentration device, flexibility is higher, strengthens the adaptability using Coal rank.
The coal dust decoupling burning device of a kind of dense side classification provided by the invention to achieve these goals, described burner comprises spout 1 and a pair collection powder flame holder, along airflow direction, this a pair collection powder flame holder rear end cross section be by spout 1 edge to center diminishing step structure, in conventional collection powder flame holder, cross section is by under upper and by diminishing step structure on lower, it is such as the patent application (as shown in Figure 1) of 201110033811.8 at application number, when adopting this structure, coal dust is maximum in the center concentration of spout 1, and successively decreased outside spout from center with hierarchic structure, and change conventional method to set up in the present invention, collection powder flame holder is set to cross section by spout 1 edge to center diminishing step structure, by described arrange breeze airflow flow through collection powder flame holder time, owing to collecting the forge piece of step type structure of powder flame holder rear end, the outer sidewind coal powder density formed near spout shell body in this passage is higher, flow velocity is faster, the coal powder density at center and flow velocity be that the staged of corresponding reduction distributes in the spout, because the front end of collection powder flame holder forms larger backflow space in outside, larger from the heat smoke amount of burner hearth backflow, and outside surpasses thick coal culm air-flow more easily and heat smoke joint, thus the intensity that heated of the super thick coal culm air-flow in outside is higher, pulverized coal pyrolysis gasify and burning velocity higher.
One as such scheme is improved, described a pair collection powder flame holder comprises middle collection powder flame holder 2 and the sidewall collection powder flame holder 3 that be arranged at spout shell body sidewall on relative with the inclined-plane of centre collection powder flame holder 2, spout 1 shell collects powder flame holder 2 plane with centre and forms light powder passage, forms dense powder passage between the inclined-plane of middle collection powder flame holder 2 and sidewall collection powder flame holder 3.
One improving again as such scheme, the middle part of described spout 1 arranges deep or light dividing plate 4, and the front end that rear end and the centre of this deep or light dividing plate 4 collect powder flame holder 2 connects, and the two ends of deep or light dividing plate 4 are connected with spout shell body.
As the another improvement of such scheme, in the middle of described, the cross section of collection powder flame holder 2 entirety is flat taper, along airflow direction, middle collection powder flame holder 2 front elevational sectional is little, rear end section is large, in the middle of described, the two ends of collection powder flame holder 2 plane are connected with spout shell body, and distance is left apart from the rear end of spout shell body in the rear end of middle collection powder flame holder 2.
As the another improvement of such scheme, the number of described sidewall collection powder flame holder 3 is two, the overall cross section of this sidewall collection powder flame holder 3 is flat taper, along airflow direction, front elevational sectional is little, rear end section is large, and the lateral surface of sidewall collection powder flame holder 3 is connected with spout 1, is provided with space between prism and the middle prism collecting powder flame holder 2.
Present invention also offers a kind of combustion method of the coal dust decoupling burning device based on the classification of dense side, described method is based on the coal dust decoupling burning device of dense side classification, described burner comprises spout 1 and a pair collection powder flame holder, along airflow direction, this a pair collection powder flame holder rear end cross section be by spout 1 edge to center diminishing step structure
Said method comprising the steps of:
1), after described coal dust enters spout 1, through a pair collection powder flame holder be oppositely arranged, due to the squeezing action on inclined-plane, air is middle part flowing in spout, and coal dust is due to effect of inertia, and the concentration of breeze airflow improves, and forms thick coal culm air-flow
2) the collection powder flame holder of described coal dust through being oppositely arranged, due to the forge piece of step type structure of this pair collection powder flame holder rear end, the air-flow that ladder is high is squeezed greatly, in this passage, formation is higher near the outer sidewind coal powder density of spout shell body, flow velocity is faster, the coal powder density at center and flow velocity be that the staged of corresponding reduction distributes in the spout, the front end of this pair collection powder flame holder forms larger backflow space in outside, larger from the heat smoke amount of burner hearth backflow, the intensity that outside thick coal culm air-flow is heated is higher.
As preferably, device of the present invention can also dock with other coal dust Pulverized Coal Concentration devices, thus realize concentrating further coal dust, obtain the coal dust decoupling burning device of dense side classification again, described a pair collection powder flame holder comprises middle collection powder flame holder 2 and the sidewall collection powder flame holder 3 that be arranged at spout shell body sidewall on relative with the inclined-plane of centre collection powder flame holder 2, spout 1 is divided into dense powder passage and light powder passage by this centre collection powder flame holder 2, dense powder air-flow 6 in described coal dust and light powder air-flow 5 enter the dense powder passage of spout 1 and light powder passage respectively, dense powder air-flow 6 enters hearth combustion through spout 1, the area of its gas channel cross section diminishes gradually along airflow direction.
As further preferred, described step 1) and 2) comprise following sub-step:
11) the dense powder passage of dense powder air-flow 6 collection powder flame holder 2 in the middle of being oppositely arranged, due to the squeezing action on inclined-plane, air is middle part flowing in spout, and coal dust is due to effect of inertia, the concentration of thick coal culm air-flow improves further, forms super thick coal culm air-flow; Dense side breeze airflow is made to be classified as super thick coal culm air-flow and thick coal culm air-flow again;
21) the dense powder passage of dense powder air-flow 6 collection powder flame holder 2 in the middle of being oppositely arranged, due to the forge piece of step type structure of centre collection powder flame holder 2 and sidewall collection powder flame holder 3 rear end, the air-flow that ladder is high is squeezed greatly, formed in this passage higher near the outer sidewind coal powder density of spout shell body, flow velocity is faster, in spout, the coal powder density at center and flow velocity be that the staged of corresponding reduction distributes; Because the front end of centre collection powder flame holder 2 and sidewall collection powder flame holder 3 forms larger backflow space in outside, larger from the heat smoke amount of burner hearth backflow, it is higher that outside surpasses the intensity that thick coal culm air-flow heated;
22) the super thick coal culm air-flow in outside heats up rapidly, super thick coal culm generation fast pyrogenation, gasification, and volatile matter nitrogen ratio significantly improves, and the oxygen content of super thick coal culm air-flow is extremely low, and coal pyrolytic gasified after volatile matter in reproducibility by force, volatile matter nitrogen generates stable N
2after the volatile combustion of ultra-concentrating powder air-flow, in succession with dense powder air-flow and the progressively mixed combustion of light powder air-flow, because the coke in thick coal culm burns in succession, the consumption of oxygen is increased, under causing light powder air-flow to be still in Hypoxic habitats with dense powder air-flow mixing after-combustion, simultaneously by the catalytic reduction effect of coke, thus coke nitrogen is converted into NO
xratio very low.
As further preferably, described method is further comprising the steps: in burner, the volatile matter of dense powder, light powder and dense coke breeze charcoal burning conversion are N
2after, supplement Secondary Air in time, allow coal dust that high-temperature oxygen-enriched reaction occurs, extend in the burner hearth clean-burning time, thus abundant after-flame, reduce the content of fly ash combustible material, CO in flue gas, achieve the decoupling burning of fine coal.
The outstanding feature of coal dust decoupling burning device provided by the invention and combustion method:
1, by collecting powder flame holder to the local multi-stage PCE again of dense powder air-flow, local breeze airflow can be made to reach super dense concentrated effect.Because the combustion system ignited step by step from dense to light can produce the effect of decoupling burning, localized concentrations compares overall concentrated pressure drop and the wearing and tearing that can reduce whole system equipment;
2, the coal dust Nong district of collection powder flame holder of the present invention is in the outside of spout, and be so more conducive to more heat smoke and entrainment super thick coal culm air-flow, the ability making it to be subject to heated at high speed is stronger;
3, this burner strong adaptability.Owing to can dock with any one Pulverized Coal Concentration device, flexibility is higher, to the different type of furnace and the adaptability enhancing using Coal rank;
4, burner structure of the present invention is also comparatively simple, and cost is low, safeguards easily.
Accompanying drawing explanation
Fig. 1 is the existing decoupling burning device structure front view containing collection powder flame holder;
Fig. 2 is the structure front view of coal dust decoupling burning device of the present invention;
Fig. 3 is the structure sectional view of coal dust decoupling burning device of the present invention;
Fig. 4 is the structure right view of coal dust decoupling burning device of the present invention.
Accompanying drawing identifies
1, spout 2, middle collection powder flame holder 3, sidewall collection powder flame holder
4, deep or light dividing plate 5, light powder air-flow 6, dense powder air-flow
Detailed description of the invention
Be further described below in conjunction with the coal dust decoupling burning device of accompanying drawing to dense side classification of the present invention.
As shown in Figure 2, decoupling burning device of the present invention comprises spout 1, middle collection powder flame holder 2, sidewall collection powder flame holder 3 and deep or light dividing plate 4.
In the middle of described, collection powder flame holder 2 is positioned at the middle part of spout 1, in the middle of described, the version of collection powder flame holder 2 is shown in accompanying drawing 3 (burner front view) and accompanying drawing 4 (burner right side cross-sectional view), its entirety is an irregular flat bullet, the two ends of plane are connected with spout shell body, and the both sides on inclined-plane surround different passage from spout shell body respectively; In embodiment part, for the direction that the front end of collection powder flame holder 2 is all contrary relative to fine coal air-flow with the front end of spout shell body, in part below, do not do specified otherwise all using the contrary direction of fine coal air-flow as reference; Distance is left apart from the front end being positioned at spout 1 in the front end of middle collection powder flame holder 2; The rear end of middle collection powder flame holder 2 connects with the front end of deep or light dividing plate 4, and the two ends of deep or light dividing plate 4 are connected with spout shell body, and centre integrates powder flame holder 2 and deep or light dividing plate 4 thus by spout 1 interior separation as two parts passage; Middle collection powder flame holder 2 front elevational sectional is large, and rear end section is little, and wherein a prism of front end is provided with the plane conduit of notch cuttype, low in spout middle part, high near spout outer housing shell side;
In spout 1, middle collection powder flame holder 2 is provided with the side of notch cuttype plane conduit, be provided with sidewall collection powder flame holder 3, its entirety of sidewall collection powder flame holder 3 is an irregular flat bullet, and front elevational sectional is large, rear end section is little, lateral surface is connected with spout 1, and prism is relative with the middle prism collecting powder flame holder 2 and keep certain distance, and the prism of front end is provided with the plane conduit of notch cuttype, low in spout middle part, high near spout 1 shell side;
And cross section is by under upper and by diminishing step structure on lower in conventional collection powder flame holder, it is such as the patent application (as shown in Figure 1) of 201110033811.8 at application number, when adopting this structure, coal dust is maximum in the center concentration of spout 1, and successively decreased outside spout from center with hierarchic structure, and change conventional method to set up in the present invention, collection powder flame holder is set to cross section by spout 1 edge to center diminishing step structure, by described arrange breeze airflow flow through collection powder flame holder time, owing to collecting the forge piece of step type structure of powder flame holder rear end, the outer sidewind coal powder density formed near spout shell body in this passage is higher, flow velocity is faster, the coal powder density at center and flow velocity be that the staged of corresponding reduction distributes in the spout, because the front end of collection powder flame holder forms larger backflow space in outside, larger from the heat smoke amount of burner hearth backflow, and outside surpasses thick coal culm air-flow more easily and heat smoke joint, thus the intensity that heated of the super thick coal culm air-flow in outside is higher, pulverized coal pyrolysis gasify and burning velocity higher.
The wing passage being provided with sidewall collection powder flame holder 3 by the dense powder air-flow 6 after outside Pulverized Coal Concentration in spout 1 enters hearth combustion, due to the inclined-plane of centre collection powder flame holder 2 and sidewall collection powder flame holder 3, the area of the gas channel cross section formed diminishes gradually along airflow direction; Light powder air-flow 5 opposite side passage in spout 1 enters hearth combustion, and due to the inclined-plane of centre collection powder flame holder 2, the area of the gas channel cross section formed diminishes gradually along airflow direction; Middle collection powder flame holder 2 plays the effect of bluff body in spout, and namely breeze airflow is high near the both sides coal powder density on bluff body inclined-plane, and defines heat smoke recirculating zone in the front end of bluff body;
When the passage of dense powder air-flow 6 between relative middle collection powder flame holder 2 and sidewall collection powder flame holder 3, due to the squeezing action on inclined-plane, air is middle part flowing in spout, and coal dust is due to effect of inertia, major part flows through along passage, the concentration of the thick coal culm air-flow flow through in the passage like this between centre collection powder flame holder 2 and sidewall collection powder flame holder 3 improves further, forms super thick coal culm air-flow; Due to the forge piece of step type structure of this passage, the air-flow that ladder is high is squeezed greatly, pressure is also higher, and in this passage, the outer sidewind coal powder density of the close spout shell body of formation is higher like this, flow velocity is faster, and the staged of the coal powder density reduction corresponding to flow velocity in the middle part of in spout distributes; Due to the front end of centre collection powder flame holder 2 and sidewall collection powder flame holder 3, lateral section is larger outside, and both have larger backflow space in outside, thus larger from the heat smoke amount of burner hearth backflow, and it is higher that outside surpasses the intensity that thick coal culm air-flow heated;
The stronger jet entrainment of bilateral to burner hearth high-temperature flue gas surpassing thick coal culm air-flow in outside forms larger backflow heat, outside ignition heat can be made so very little, the super thick coal culm air-flow that sectional area is very thin burns fast under strong reducing property atmosphere, and ignite middle part thick coal culm air-flow step by step; And in burner hearth, the thick coal culm air-flow burnt ignites light powder air-flow again, realizes the process of ignition step by step.
The process of this ignition step by step is more conducive to the effect improving decoupling burning.First make super thick coal culm gas flow temperature be elevated to 700 ~ 1200 DEG C of high temperature rapidly, coal dust generation fast pyrogenation, gasification, volatile matter nitrogen ratio significantly improves.Because the oxygen content of super thick coal culm air-flow is extremely low, and coal pyrolytic gasified after volatile matter in NH
3, NCH, C
mh
nthe strong reducing property of (hydrocarbon), CO, the NO that this stage volatile matter nitrogen generates
xmajor part has changed into stable N
2.After the volatile combustion of dense powder air-flow, in succession with dense powder air-flow and the progressively mixed combustion of light powder air-flow; Because the coke in thick coal culm burns in succession, increase the consumption of oxygen, under causing light powder air-flow to be still in Hypoxic habitats with dense powder air-flow mixing after-combustion, until after mixing with Secondary Air, the condition of combustion with meagre oxygen just changes to some extent.Because most of volatile has been burnt, and first through carbon grain surface reducing atmosphere layer when coke nitrogen is separated out, simultaneously by the catalytic reduction effect of coke, thus coke nitrogen is converted into NO
xratio very low.Burner combustion completes N earlier
2conversion after, Secondary Air can be supplemented in time, allow coal dust that high-temperature oxygen-enriched reaction occurs early, extend in the burner hearth clean-burning time, thus abundant after-flame, reduce the content of fly ash combustible material, CO in flue gas.From the above mentioned, this combustion system can solve fly ash combustible material, CO and the NO of coal dust firing
xcoupling emission problem, achieve the two and discharge the decoupling burning that simultaneously reduces.
The cross section of collection powder flame holder entirety of the present invention also can be the forms such as oblique wave shape wave, as long as it is large to reach outer lateral section, inside cross-sectional is little, and the circumference contacted with breeze airflow is long;
Integrate powder flame holder 2 in the middle of of the present invention also can only side be as notch cuttype cross section, and sidewall collection powder flame holder 3 corresponding with it also can only have one, can not increase under whole burner appearance and size like this, has greater room lifting and guarantees the performance of side.
Light powder side of the present invention also can adopt the version identical with dense powder side, to improve the combustibility of light powder side.
Spout 1 of the present invention can be that rectangle for circular or oval, can not affect the enforcement of the present invention program yet.
It should be noted last that, above embodiment is only in order to illustrate technical scheme of the present invention and unrestricted.Although with reference to embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that, modify to technical scheme of the present invention or equivalent replacement, do not depart from the spirit and scope of technical solution of the present invention, it all should be encompassed in the middle of right of the present invention.
Claims (6)
1. the coal dust decoupling burning device of a dense side classification, described burner comprises spout (1) and a pair collection powder flame holder, it is characterized in that, this pair collection powder flame holder rear end cross section be by spout (1) edge to center diminishing step structure;
Described a pair collection powder flame holder comprises the centre be arranged in spout (1) and collects powder flame holder (2) and sidewall collection powder flame holder (3) that be arranged at spout shell body sidewall on relative with the inclined-plane of centre collection powder flame holder (2), spout (1) shell collects powder flame holder (2) plane with centre and forms light powder passage, dense powder passage is formed between the inclined-plane of middle collection powder flame holder (2) and sidewall collection powder flame holder (3), the outer sidewind coal powder density formed near spout shell body in this dense powder passage is higher, flow velocity is faster, the coal powder density at center and flow velocity be that the staged of corresponding reduction distributes in the spout.
2. the coal dust decoupling burning device of dense side classification according to claim 1, it is characterized in that, the middle part of described spout (1) arranges deep or light dividing plate (4), the front end that rear end and the centre of this deep or light dividing plate (4) collect powder flame holder (2) connects, and the two ends of deep or light dividing plate (4) are connected with spout shell body.
3. the coal dust decoupling burning device of dense side classification according to claim 1 and 2, it is characterized in that, the cross section that in the middle of described, collection powder flame holder (2) is overall is flat taper, along airflow direction, middle collection powder flame holder (2) front elevational sectional is little, rear end section is large, and in the middle of described, the two ends of collection powder flame holder (2) plane are connected with spout shell body, and distance is left apart from the rear end of spout shell body in the rear end of middle collection powder flame holder (2).
4. the coal dust decoupling burning device of dense side classification according to claim 1 and 2, it is characterized in that, the number of described sidewall collection powder flame holder (3) is two, the overall cross section of this sidewall collection powder flame holder (3) is flat taper, along airflow direction, front elevational sectional is little, and rear end section is large, the lateral surface of sidewall collection powder flame holder (3) is connected with spout (1), is provided with space between prism and the middle prism collecting powder flame holder (2).
5., based on a combustion method for the coal dust decoupling burning device of dense side classification described in claim 1, it is characterized in that, said method comprising the steps of:
1) after described coal dust enters spout (1), through a pair collection powder flame holder be oppositely arranged, due to the squeezing action on inclined-plane, air is middle part flowing in spout, coal dust is due to effect of inertia, and the concentration flowing through the breeze airflow of collection powder flame holder improves, and forms thick coal culm air-flow;
2) the collection powder flame holder of described coal dust through being oppositely arranged, due to the forge piece of step type structure of this pair collection powder flame holder rear end, the air-flow that ladder is high is squeezed greatly, in this passage, formation is higher near the outer sidewind coal powder density of spout shell body, flow velocity is faster, the coal powder density at center and flow velocity be that the staged of corresponding reduction distributes in the spout, the front end of this pair collection powder flame holder forms larger backflow space in outside, larger from the heat smoke amount of burner hearth backflow, the intensity that outside thick coal culm air-flow is heated is higher.
6. the combustion method of the coal dust decoupling burning device of dense side classification according to claim 5, is characterized in that, described step 1) in further comprising the steps of:
Described a pair collection powder flame holder comprises middle collection powder flame holder (2) and sidewall collection powder flame holder (3) that be arranged at spout shell body sidewall on relative with the inclined-plane of centre collection powder flame holder (2), spout (1) is divided into dense powder passage and light powder passage by this centre collection powder flame holder (2), dense powder air-flow (6) in described coal dust and light powder air-flow (5) enter the dense powder passage of spout (1) and light powder passage respectively, dense powder air-flow (6) enters hearth combustion through spout (1), the area of its gas channel cross section diminishes gradually along airflow direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110455316.6A CN103185338B (en) | 2011-12-30 | 2011-12-30 | A kind of coal dust decoupling burning device of dense side classification and combustion method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110455316.6A CN103185338B (en) | 2011-12-30 | 2011-12-30 | A kind of coal dust decoupling burning device of dense side classification and combustion method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103185338A CN103185338A (en) | 2013-07-03 |
| CN103185338B true CN103185338B (en) | 2015-08-19 |
Family
ID=48676663
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110455316.6A Expired - Fee Related CN103185338B (en) | 2011-12-30 | 2011-12-30 | A kind of coal dust decoupling burning device of dense side classification and combustion method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103185338B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107152678B (en) * | 2016-03-02 | 2019-08-30 | 山西三合盛节能环保技术股份有限公司 | A kind of enhancing shunts the pulverized coal decoupling combustor and combustion method of enrichment |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4634054A (en) * | 1983-04-22 | 1987-01-06 | Combustion Engineering, Inc. | Split nozzle tip for pulverized coal burner |
| CN1250902C (en) * | 2001-07-03 | 2006-04-12 | 阿尔斯托姆科技有限公司 | Pulverized solid fuel nozzle tip with ceramic component |
| CN101187472B (en) * | 2007-12-07 | 2010-06-16 | 华中科技大学 | Low NOx pulverized coal burner |
| CN102620291A (en) * | 2011-01-31 | 2012-08-01 | 中国科学院过程工程研究所 | Pulverized coal decoupling combustor with low nitrogen oxide discharge and pulverized coal decoupling combustion method with low nitrogen oxide discharge |
| CN202452487U (en) * | 2011-12-30 | 2012-09-26 | 中国科学院过程工程研究所 | Concentrated side classification pulverized coal decoupling combustor |
-
2011
- 2011-12-30 CN CN201110455316.6A patent/CN103185338B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4634054A (en) * | 1983-04-22 | 1987-01-06 | Combustion Engineering, Inc. | Split nozzle tip for pulverized coal burner |
| CN1250902C (en) * | 2001-07-03 | 2006-04-12 | 阿尔斯托姆科技有限公司 | Pulverized solid fuel nozzle tip with ceramic component |
| CN101187472B (en) * | 2007-12-07 | 2010-06-16 | 华中科技大学 | Low NOx pulverized coal burner |
| CN102620291A (en) * | 2011-01-31 | 2012-08-01 | 中国科学院过程工程研究所 | Pulverized coal decoupling combustor with low nitrogen oxide discharge and pulverized coal decoupling combustion method with low nitrogen oxide discharge |
| CN202452487U (en) * | 2011-12-30 | 2012-09-26 | 中国科学院过程工程研究所 | Concentrated side classification pulverized coal decoupling combustor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103185338A (en) | 2013-07-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102620291B (en) | Pulverized coal decoupling combustor with low nitrogen oxide discharge and pulverized coal decoupling combustion method with low nitrogen oxide discharge | |
| CN102297425B (en) | Pulverized coal decoupling combustor and decoupling combustion method thereof | |
| CN100422636C (en) | Low NOx oil gun device heated by backheating | |
| CN202546811U (en) | Compound furnace arch and compound secondary air structure | |
| CN204786347U (en) | Biomass gasification phase separating combustion furnace | |
| CN201137933Y (en) | Low NOx coal fines thick and thin oil-saving burner | |
| CN203785241U (en) | Thrice combusting hot-air boiler | |
| CN102679390A (en) | Compound furnace arch and compound secondary air structure for cooperatively controlling generation of nitrogen oxide (NOX) | |
| CN201215311Y (en) | Adjustable bias jet DC coal burner | |
| CN103185338B (en) | A kind of coal dust decoupling burning device of dense side classification and combustion method | |
| CN202452487U (en) | Concentrated side classification pulverized coal decoupling combustor | |
| CN205227306U (en) | Deep or light hierarchical buggy low NOx burner | |
| CN102128446A (en) | Boiler for carrying out mixed combustion on carbon black tail gas and coal | |
| CN109931597B (en) | Fuel staged gasification and low NOXCombustion boiler | |
| CN103123110B (en) | Pulverized coal burner for pulverized coal collection and concentration, and burning method | |
| CN202338901U (en) | Power collecting and concentrating pulverized coal burner | |
| CN201448818U (en) | Biomass solid fuel steam boiler | |
| CN203099813U (en) | Distributary thickening braize decoupling burner | |
| CN105333416B (en) | Coke particle clean combustion stove | |
| CN209147149U (en) | Counter-combustion coal stove and its secondary air-distributing device | |
| CN209147148U (en) | Counter-combustion coal stove and its device for reducing tar generation | |
| CN209147151U (en) | More backhaul reverse burning furnace tools | |
| CN207230527U (en) | A kind of low nitrogen combustion apparatus of coal dust gasification burning | |
| CN205504972U (en) | Buggy decoupling zero combustor of reinforcing reposition of redundant personnel densification | |
| CN209558481U (en) | A kind of coal-fired gasification furnace equipped with energy-gathering ring combustion-supporting |
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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150819 Termination date: 20161230 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |