CN101749700A - Pulverized coal furnace tiny-oil ignition combustion method - Google Patents
Pulverized coal furnace tiny-oil ignition combustion method Download PDFInfo
- Publication number
- CN101749700A CN101749700A CN 201010117862 CN201010117862A CN101749700A CN 101749700 A CN101749700 A CN 101749700A CN 201010117862 CN201010117862 CN 201010117862 CN 201010117862 A CN201010117862 A CN 201010117862A CN 101749700 A CN101749700 A CN 101749700A
- Authority
- CN
- China
- Prior art keywords
- pulverized coal
- flame
- coal channel
- tiny
- oil ignition
- 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.)
- Pending
Links
Images
Abstract
The invention provides a pulverized coal furnace tiny-oil ignition combustion method which mainly solves the problem that the existing ignition method can not be applied to less oil ignition of a W-flame cyclone rich-thin pulverized coal burner. The pulverized coal furnace micro-oil ignition combustion method comprises the following steps: 1) leading pulverized coal in a main pulverized coal pipeline into a micro-oil ignition device arranged in a first secondary pulverized coal pipeline for ignition; and 2) after ignition is finished, switching a change-over valve on the main pulverized coal pipeline, and sending the pulverized coal air current into a secondary pulverized coal pipeline. The method has wide coal kind adaptability, low operating cost, low energy consumption and high reliability and is favorable for environment protection.
Description
Technical field
The present invention relates to a kind of pulverized coal furnace tiny-oil ignition combustion method, be specifically related to the method that the dense dilute phase coal burner of a kind of W of application flame whirlwind is lighted a fire, be mainly used in the black furnace igniting of coal-powder boiler in the thermal power generation.
Background technology
At present, in the thermal power generation coal-powder boiler being carried out black furnace igniting generally all adopts large-scale oil combustion device is set in overfiren air port, when the total specified fuel consumption of its oil gun is about the boiler rated load 30% of calory burning, need to continue several hrs, after all being reached a high temperature, throws in burner hearth the powder burning everywhere, mix and progressively remove oil according to the rules after burning suitable load, so fuel consumption is quite big during the black furnace ignition trigger.
China is a rich coal resources, and the deficient relatively country of oil, natural gas resource, though rich coal resources in China, coal is changeable, ature of coal is relatively poor; Because domestic coal state of supply constantly worsens in recent years, power plant is forced to use ash content height, colm that calorific value is low, makes the phenomenon of high load capacity fire extinguishing happen occasionally like this.Need often to throw the combustion-supporting steady combustion of oil in order to stablize the stove internal combustion, cause to consume a large amount of combustion-supporting oil, often much larger than starting oil consumption, big oil consumption is constantly risen the production cost of electric power enterprise to the consumption of combustion-supporting oil.
Domestic at the mid-80 in last century, developed the few-oil ignition combustion device; About 2000, develop the plasma non-oil ignition technology; Developed meager coal cold state ignition under tiny oil and steady burning burner in ultra low load in 2005.Though small oil gun start-up burner coal adaptability is wide, oil consumption is still higher; The plasma non-oil ignition technology only obtains to use at present on brown coal, bituminous coal; Patent of invention 200510049732.0 meager coal cold state ignition under tiny oil and steady burning burner in ultra low load in 2005, the little oil burner of domestic other types is as technology such as 20032012938.0 and 200320103151.7, and is all unsuccessful in the use that uses on anthracite, colm, the meager coal unit.
Though and coal resources in China is abundant, but coal is changeable, ature of coal is relatively poor, a large amount of power plant use meager coal, colm, anthracite, the oil consumption of these power plant is much higher than the power plant that uses brown coal, bituminous coal, therefore, the main direction that reduces the station boiler oil consumption significantly should be conceived to use meager coal, colm, anthracitic unit, and the high problem of thermal power generation corporations' oil consumption is solved with obtaining.
Simultaneously, the existing start-up burner that is applicable to coner firing, front and back opposed firing mode, but W flame combustion mode are after the special-purpose type of furnace introduction of anthracite, because combustion system and burner structure itself are more special, still do not have effective way and realize that few-oil ignition starts.
Summary of the invention
The invention provides a kind of pulverized coal furnace tiny-oil ignition combustion method, mainly solved existing ignition method and can't be applied to the problem that the dense dilute phase coal burner of W flame whirlwind carries out few-oil ignition.
Technical solution of the present invention is as follows:
This pulverized coal furnace tiny-oil ignition combustion method may further comprise the steps:
1] coal dust in the main pulverized coal channel 1 being imported the tiny-oil ignition device 5 that is arranged in the first secondary pulverized coal channel 3 lights a fire;
2] switch the switching door 2 that is arranged on the main pulverized coal channel 1 after igniting is finished, breeze airflow is sent into the second secondary pulverized coal channel 4;
The above step 1] comprising:
1.1] breeze airflow to switching door 2 places, opens the switching door 2 that is provided with on the main pulverized coal channel 1 by main pulverized coal channel 1, and breeze airflow is sent into the first secondary pulverized coal channel 3, is provided with tiny-oil ignition device 5 in the described first secondary pulverized coal channel 3;
1.2] inlet of the stable flame cover 6 of part breeze airflow by being positioned at the first secondary pulverized coal channel, 3 centers, entering one-level combustion tube 7 inside, another part breeze airflow is by the circular passage between the one-level combustion tube 7 and the first secondary pulverized coal channel 3;
1.3] by the thermal-flame that the oil gun of the tiny-oil ignition device 5 in the first secondary pulverized coal channel 3 ejects, through stable flame cover 6 steady flames, be injected into one-level combustion tube 7 inside, the breeze airflow of the one-level of igniting rapidly combustion tube 7 inside, formation one-level combustion flame;
1.4] the inner one-level combustion flames that form of one-level combustion tube 7 enter secondary firing pipe 8 and burn away, and form secondary firing flame;
1.5] the secondary firing flame outlet section inside that enters the first secondary pulverized coal channel 3 burns away, and form three grades of combustion flames, and the spout after first secondary pulverized coal channel 3 outlets spurted into burner hearth with torch-like.
Above-mentioned stable flame cover 6 joins with one-level combustion tube 7, and leave the mouse cage passage, the part breeze airflow enters one-level combustion tube 7 by the mouse cage passage that the stable flame cover 6 that is positioned at the first secondary pulverized coal channel, 3 centers enters the mouth, on the inwall of the first secondary pulverized coal channel 3 before mouse dragon passage the venturi shape is set and concentrates ring 10, can make the breeze airflow that enters mouse dragon passage is concentrated phase; Another part breeze airflow enters the circular passage between the one-level combustion tube 7 and the first secondary pulverized coal channel 3;
First secondary pulverized coal channel 3 tapers between above-mentioned one-level combustion tube 7 and the secondary firing pipe 8 dwindle, shrink the be folded to effect of hypotenuse to the next breeze airflow of one-level combustion tube 7 outer ring passages, make pulverized coal particles many relatively in this part air-flow enter secondary firing pipe 8, and with the one-level combustion flame mixed combustion that enters secondary firing pipe 8, form secondary firing flame; The less another part of the relative pulverized coal particle of this part air-flow then enters the circular passage outside the secondary firing pipe 8;
Breeze airflow that flow out secondary firing pipe 8 outer circular passages and secondary firing flame form three grades of combustion flames and spurt into burner hearth through spout in the first secondary pulverized coal channel 3 outlet section mixed combustion.
The exit of above-mentioned one-level combustion tube 7, secondary firing pipe 8 is good so that furnace arch, furnace nose to be set respectively.
The outer setting of the above-mentioned first secondary pulverized coal channel 3 has the circumference after-flame wind of aftercombustion air, and circumference after-flame wind can adopt individual layer circumference after-flame wind or double-deck circumference after-flame wind, and above-mentioned circumference after-flame wind can adopt direct current wind or eddy flow wind according to application need.
Above-mentioned tiny-oil ignition device 5 can or be obliquely installed with the first secondary pulverized coal channel 3 coaxial settings.
The invention has the advantages that:
1. make and adopt the boiler of the dense dilute phase coal burner of W flame whirlwind also can realize few-oil ignition.
2. has coal adaptability widely.Both be applicable to brown coal, bituminous coal, and also be applicable to the relatively poor coals of ature of coal such as anthracite, colm, meager coal, the stability of a system is good, and is safe and reliable.
3. implementation cost is low.System architecture is simple, is particularly suitable for the transformation of existing equipment, and the retrofit work amount is little, easy to implement.Need not to regulate, need not to increase field apparatus.
4. energy consumption is low, the reliability height.According to the principle of igniting step by step, with the micro oil fraction breeze airflow that ignites earlier, amplify step by step again, most of breeze airflow that ignites, coal dust in the burner hearth that finally ignites reaches with the ignite purpose of a large amount of breeze airflows of micro oil.
5. be beneficial to environmental protection.In the process of igniting step by step, the thick coal culm air-flow is in the combustion with meagre oxygen state all the time, and therefore, the NOx of generation reduces significantly, has reduced the pollution to atmosphere, helps environmental protection.
Description of drawings
Fig. 1 is a concrete structure schematic diagram of the present invention.
The specific embodiment
Below in conjunction with accompanying drawing the present invention is described in detail, as shown in Figure 1:
1] breeze airflow that main pulverized coal channel 1 is carried imports the tiny-oil ignition combustion devices that are arranged in the first secondary pulverized coal channel 3 and carries out tiny-oil ignition;
1.1] breeze airflow, switches door 2 first secondary pulverized coal channel 3 wing passages are opened to switching door 2 places by main pulverized coal channel 1, second secondary pulverized coal channel 4 wing passages are closed.The breeze airflow of main pulverized coal channel 1 is sent into the first secondary pulverized coal channel 3, is provided with tiny-oil ignition device 5 in the described first secondary pulverized coal channel 3, and tiny-oil ignition device 5 can or be obliquely installed with the first secondary pulverized coal channel 3 coaxial settings;
1.2] lower end of tiny-oil ignition device 5 is provided with stable flame cover 6, stable flame cover 6 joins with one-level combustion tube 7, and leave mouse dragon passage, the part breeze airflow enters one-level combustion tube 7 by the mouse cage passage, on first secondary pulverized coal channel 3 inwalls before mouse dragon passage the venturi shape is set and concentrates ring 10, can make the breeze airflow that enters mouse dragon passage is concentrated phase; Another part breeze airflow enters the circular passage between the one-level combustion tube 7 and the first secondary pulverized coal channel 3;
1.3] being injected into inside, one-level combustion tube 7 road by the thermal-flame of tiny-oil ignition device 5 oil guns burning generation in the first secondary pulverized coal channel 3, the breeze airflow in the one-level of igniting the rapidly combustion tube 7 forms the one-level combustion flame;
1.4] one-level combustion tube 7 is separated by a distance in the first secondary pulverized coal channel 3 with secondary firing pipe 8, dwindle from the one-level combustion tube 7 outlet beginnings first secondary pulverized coal channel 3 diameter tapers, shrink hypotenuse the breeze airflow that one-level combustion tube 7 outer ring passages come is folded to effect;
Shrink the effect that is folded to of hypotenuse, the denseer part of breeze airflow that makes one-level combustion tube 7 outer ring passages enters secondary firing pipe 8, lighter part enters secondary firing pipe 8 outer ring passages.Enter breeze airflow and one-level combustion flame mixed combustion in secondary firing pipe 8 of spraying in the secondary firing pipe 8, form secondary firing flame from one-level combustion tube 7;
1.5] secondary firing flame enter the first secondary pulverized coal channel 3 outlet section and with burn away after the breeze airflow that comes from secondary firing pipe 8 outer ring passages mixes, forming coal dust firing is three grades of main combustion flames, these three grades of combustion flames respectively at coal burner spout and surrounding air spout after air film wind and surrounding air classification oxygenating, this flame is spurted into burner hearth by spout after making coal dust firing more fully, realizes that tiny-oil ignition starts.
2] after igniting is finished, switch door 2 and close the first secondary coal pipeline wing passage, open second secondary pulverized coal channel 4 wing passages simultaneously, coal dust is sent into the second secondary pulverized coal channel 4, system returns to former normal condition operation.
The exit of one-level combustion tube 7, secondary firing pipe 8 can be provided with furnace arch, furnace nose respectively; The first secondary pulverized coal channel 3 exit inwalls are provided with knuckle equally.
The outer setting of the first secondary pulverized coal channel 3 has the circumference after-flame wind of aftercombustion air, and circumference after-flame wind can adopt individual layer circumference after-flame wind or double-deck circumference after-flame wind, and above-mentioned circumference after-flame wind can adopt direct current wind or eddy flow wind according to application need.
In one-level, secondary firing pipe 8, spout exit the wall temperature measurement device is set, can in time monitors combustion tube wall temperature situation of change, Oil Gun, air film air quantity change according to wall temperature to be regulated, and can guarantee that each pipe is in the safe temperature scope.
Main pulverized coal channel 1 and the first secondary pulverized coal channel 3 are connected by threeway with the second secondary pulverized coal channel 4, and switching door 2 is set, its effect is: ignition process can import the little oil burner that be arranged on the first secondary pulverized coal channel 3 with the breeze airflow of main pulverized coal channel 1; In the normal course of operation, make breeze airflow enter the dense dilute phase coal burner of whirlwind according to former design point by the second secondary pulverized coal channel 4; Be that system returns to former duty.
When adopting double-deck circumference after-flame wind, concrete class carries out following setting:
Air film wind is set: the part that air film airduct bottom is in the circumference air port becomes the coal burner spout naturally; and in contract with the circumference air port in certain distance; air film wind enters from the circular passage between the first secondary pulverized coal channel 3 and air film airduct, can the cooling protection spout not be burnt out, replenishes coal dust firing simultaneously and need the oxygen amount.Wherein the wind regime of air film wind can be realized from external world's introducing cold wind or hot blast.
Surrounding air is set: the circumference air port is positioned at the air film wind snout section outside, and wind regime burning crude oil wind can further replenish coal dust firing oxygen amount, the while cooled nozzle is not burnt out.
Claims (7)
1. a pulverized coal furnace tiny-oil ignition combustion method is characterized in that, may further comprise the steps:
1] coal dust in the main pulverized coal channel (1) being imported the tiny-oil ignition device (5) that is arranged in the first secondary pulverized coal channel (3) lights a fire;
1.1] breeze airflow locates to switching door (2) by main pulverized coal channel (1), open main pulverized coal channel (1) and go up the switching door (2) that is provided with, breeze airflow is sent into the first secondary pulverized coal channel (3), be provided with tiny-oil ignition device (5) in the described first secondary pulverized coal channel (3);
1.2] inlet of the stable flame cover (6) of part breeze airflow by being positioned at first secondary pulverized coal channel (3) center, entering one-level combustion tube (7) inside, another part breeze airflow is by the circular passage between the one-level combustion tube (7) and the first secondary pulverized coal channel (3);
1.3] thermal-flame that ejects by the oil gun of the tiny-oil ignition device (5) in the first secondary pulverized coal channel (3), through the steady flame of stable flame cover (6), be injected into one-level combustion tube (7) inside, the breeze airflow that the one-level of igniting rapidly combustion tube (7) is inner forms the one-level combustion flame;
1.4] the inner one-level combustion flame that forms of one-level combustion tube (7) enters secondary firing pipe (8) and burn away, and forms secondary firing flame;
1.5] secondary firing flame enters first powder feeding pipes (3) outlet section inside and burn away, and forms three grades of combustion flames, and the spout after the outlet of the first secondary pulverized coal channel (3) is spurted into burner hearth with torch-like;
2] switch the switching door (2) that is arranged on the main pulverized coal channel (1) after igniting is finished, breeze airflow is sent into the second secondary pulverized coal channel (4);
2. pulverized coal furnace tiny-oil ignition combustion method according to claim 1, it is characterized in that: described stable flame cover (6) joins with one-level combustion tube (7), and leave the mouse cage passage, the part breeze airflow enters one-level combustion tube (7) road by the mouse cage passage that the stable flame cover (6) that is positioned at first secondary pulverized coal channel (3) center enters the mouth, on the inwall of the first secondary pulverized coal channel (3) before mouse dragon passage the venturi shape is set and concentrates ring (10), can make the breeze airflow that enters mouse dragon passage is concentrated phase; Another part breeze airflow enters the circular passage between the one-level combustion tube (7) and the first secondary pulverized coal channel (3).
3. pulverized coal furnace tiny-oil ignition combustion method according to claim 1 and 2, it is characterized in that: first secondary pulverized coal channel (3) taper between described one-level combustion tube (7) and the secondary firing pipe (8) dwindles, shrink the be folded to effect of hypotenuse to the next breeze airflow of one-level combustion tube (7) outer ring passage, make pulverized coal particles many relatively in this part air-flow enter secondary firing pipe (8), and with the one-level combustion flame mixed combustion that enters secondary firing pipe (8), form secondary firing flame; The less another part of the relative pulverized coal particle of this part air-flow then enters the outer circular passage of secondary firing pipe (8);
4. pulverized coal furnace tiny-oil ignition combustion method according to claim 3, it is characterized in that: breeze airflow and the space mixed combustion in first pulverized coal channel (3) outlet section of secondary firing flame that flows out the outer circular passage of described secondary firing pipe (8) form three grades of combustion flames and spurt into burner hearth through the coal burner spout.
5. pulverized coal furnace tiny-oil ignition combustion method according to claim 4 is characterized in that: the exit of described one-level combustion tube (7), secondary firing pipe (8) is to be provided with furnace arch, furnace nose respectively.
6. pulverized coal furnace tiny-oil ignition combustion method according to claim 5, it is characterized in that: the outer setting of the described first secondary pulverized coal channel (3) has the circumference after-flame wind of aftercombustion air, circumference after-flame wind can adopt individual layer circumference after-flame wind or double-deck circumference after-flame wind, above-mentioned circumference after-flame elegance direct current wind or eddy flow wind.
7. pulverized coal furnace tiny-oil ignition combustion method according to claim 6 is characterized in that: described tiny-oil ignition device (5) is with the first coaxial setting of secondary pulverized coal channel (3) or be obliquely installed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010117862 CN101749700A (en) | 2010-03-04 | 2010-03-04 | Pulverized coal furnace tiny-oil ignition combustion method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010117862 CN101749700A (en) | 2010-03-04 | 2010-03-04 | Pulverized coal furnace tiny-oil ignition combustion method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101749700A true CN101749700A (en) | 2010-06-23 |
Family
ID=42477080
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010117862 Pending CN101749700A (en) | 2010-03-04 | 2010-03-04 | Pulverized coal furnace tiny-oil ignition combustion method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101749700A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105605607A (en) * | 2016-03-02 | 2016-05-25 | 内蒙古金土环保科技有限公司 | Multi-section pipeline type pulverized coal combustor |
| CN111023083A (en) * | 2019-12-19 | 2020-04-17 | 哈尔滨工业大学 | W flame boiler adopting cyclone burner |
| CN112050199A (en) * | 2020-08-21 | 2020-12-08 | 北京巴布科克·威尔科克斯有限公司 | Burner and W flame boiler |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1992001194A1 (en) * | 1990-07-13 | 1992-01-23 | Imatran Voima Oy | Method for reducing emissions of oxides of nitrogen in combustion of various kinds of fuels |
| JP2950720B2 (en) * | 1994-02-24 | 1999-09-20 | 株式会社東芝 | Gas turbine combustion device and combustion control method therefor |
| CN2747468Y (en) * | 2003-09-18 | 2005-12-21 | 郑平安 | Stable combustion type normal concentration dc coal powder burner |
| CN1912462A (en) * | 2006-08-23 | 2007-02-14 | 傅宁娟 | Vortex burner of micro-oil cold furnace igniting and superlow load stable burning and with low NOx drainage |
| CN101093077A (en) * | 2007-05-25 | 2007-12-26 | 清华大学 | Eddy flow powdered coal burner lit up by tiny oil |
| CN101191614A (en) * | 2006-12-01 | 2008-06-04 | 郑平安 | General purpose coal dust micro-oil igniting method |
| CN101338973A (en) * | 2007-07-06 | 2009-01-07 | 烟台龙源电力技术股份有限公司 | Fuel-economizing coal powder burner applying to cement kiln |
-
2010
- 2010-03-04 CN CN 201010117862 patent/CN101749700A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1992001194A1 (en) * | 1990-07-13 | 1992-01-23 | Imatran Voima Oy | Method for reducing emissions of oxides of nitrogen in combustion of various kinds of fuels |
| JP2950720B2 (en) * | 1994-02-24 | 1999-09-20 | 株式会社東芝 | Gas turbine combustion device and combustion control method therefor |
| CN2747468Y (en) * | 2003-09-18 | 2005-12-21 | 郑平安 | Stable combustion type normal concentration dc coal powder burner |
| CN1912462A (en) * | 2006-08-23 | 2007-02-14 | 傅宁娟 | Vortex burner of micro-oil cold furnace igniting and superlow load stable burning and with low NOx drainage |
| CN101191614A (en) * | 2006-12-01 | 2008-06-04 | 郑平安 | General purpose coal dust micro-oil igniting method |
| CN101093077A (en) * | 2007-05-25 | 2007-12-26 | 清华大学 | Eddy flow powdered coal burner lit up by tiny oil |
| CN101338973A (en) * | 2007-07-06 | 2009-01-07 | 烟台龙源电力技术股份有限公司 | Fuel-economizing coal powder burner applying to cement kiln |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105605607A (en) * | 2016-03-02 | 2016-05-25 | 内蒙古金土环保科技有限公司 | Multi-section pipeline type pulverized coal combustor |
| CN105605607B (en) * | 2016-03-02 | 2018-09-21 | 内蒙古金土环保科技有限公司 | Multistage duct type coal burner |
| CN111023083A (en) * | 2019-12-19 | 2020-04-17 | 哈尔滨工业大学 | W flame boiler adopting cyclone burner |
| CN112050199A (en) * | 2020-08-21 | 2020-12-08 | 北京巴布科克·威尔科克斯有限公司 | Burner and W flame boiler |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201680364U (en) | Efficient low NOx pulverized coal burner for small and medium-sized industrial boilers | |
| CN201093529Y (en) | Two-stage blunt body minim oil lighter | |
| CN103615717A (en) | Novel oxygen enrichment tiny-oil ignition and ultralow load stable-combustion combustor | |
| CN100422636C (en) | Low NOx oil gun device heated by backheating | |
| CN201137936Y (en) | Cyclone coal powder burner | |
| CN102519037B (en) | Plasma oil-free ignition combustor | |
| CN103868068B (en) | A kind of high-temperature oxygen direct-fire and surely fire system | |
| WO2014110996A1 (en) | Ignition combustor for supporting combustion with pure oxygen | |
| CN104613466A (en) | Double-volute swirl type pulverized coal burner provided with natural gas spray pipe and pre-burning chamber | |
| CN201059598Y (en) | Blunt body micro-oil-gasification ignition combusting device | |
| CN101749700A (en) | Pulverized coal furnace tiny-oil ignition combustion method | |
| CN206786717U (en) | A kind of two-chamber combustion gas low nitrogen burning machine | |
| CN103836620B (en) | Oxygen-enriched micro-oil staged combustion device | |
| CN201170549Y (en) | Horizontal concentrating type micro oil gasification firing powered coal burner | |
| CN205402704U (en) | Two -stage adjustable steam plasma cyclone burner | |
| CN208025504U (en) | A kind of coal burner | |
| CN201496958U (en) | W-flame cyclone separation low-oil ignition burner | |
| CN107013915B (en) | Little oil ignition combustor suitable for power station boiler | |
| CN201599792U (en) | W-flame micro-oil ignition burner | |
| CN101839478B (en) | Pulverized coal industrial boiler oil-free coal gas ignition and stable combustion method and device | |
| CN204786376U (en) | Little oily coal burner of industrial boiler whirl | |
| CN101191614B (en) | General purpose coal dust micro-oil igniting method | |
| CN203784939U (en) | Oxygen-enriched micro oil staged combustion device | |
| CN202769647U (en) | Novel burner | |
| CN106642082A (en) | Small-sized cyclone-melting pulverized coal furnace |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20100623 |