CN201582812U - Pulverized coal burner for oxygen-rich local combustion-supporting - Google Patents
Pulverized coal burner for oxygen-rich local combustion-supporting Download PDFInfo
- Publication number
- CN201582812U CN201582812U CN2009203506429U CN200920350642U CN201582812U CN 201582812 U CN201582812 U CN 201582812U CN 2009203506429 U CN2009203506429 U CN 2009203506429U CN 200920350642 U CN200920350642 U CN 200920350642U CN 201582812 U CN201582812 U CN 201582812U
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- oxygen
- chamber
- combustion
- preheating chamber
- airflow passage
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- 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
Abstract
A pulverized coal burner for oxygen-rich local combustion-supporting comprises a primary air pipe, a thick-lean separator arranged behind the primary air pipe, a lean powder airflow passage, a thick powder airflow passage, a preheating chamber or precombustion chamber, and a combustion chamber, wherein the lean powder airflow passage is communicated with the combustion chamber directly; the thick powder airflow passage is communicated with the preheating chamber or the precombustion chamber; and an oxygen-rich airflow passage is formed on the preheating chamber or the precombustion chamber close to the thick powder airflow passage. In the utility model, through the improvement of local pyrogenation and reaction conditions, stable small flame is formed in the preheating chamber or the precombustion chamber at the outlet of the combustor or on the outlet section of the combustor, and then the small flame is used for igniting and stabilizing the primary air flame, so that the ignition and stable combustion capabilities are enhanced. Through the use of the utility model, the oxygen consumption is greatly saved, the requirement for oxygen quality is remarkably reduced; and moreover, the utility model has the advantages of easy operation, good adjusting performance, economy, safety and reliable operation.
Description
Technical field
The utility model relates to a kind of coal-dust combustion device, belongs to solid fuel ignition auxiliary equipment technical field.
Background technology
In pulverized-coal fired boiler and some powdered solid fuel combustion apparatus thereof, during device start, perhaps owing to reasons such as load reduction or fuel quality variation, it is combustion-supporting usually to need to throw oil, consumes a large amount of fuel oils.Along with the exhaustion of petroleum resources and riseing of price, the consumption of great amount of fuel oil has reduced the economy of equipment widely.Research and practice show, appropriateness increases the oxygen concentration in the fuel gas stream, can make the heating and the heating rate of powdered solid fuel improve greatly, the precipitation rate of volatile matter and the amount of separating out increase, make that taking the powder air-flow also can reach the necessary condition of catching fire preferably under lower temperature of incoming flow, to various solid fuels, especially the lower difficult burning stone fuel of volatile matter, as soft coal, meager coal, anthracite and petroleum coke etc. catch fire and surely combustion be very helpful.
Important techniques problem is how to use oxygen as few as possible and reduce requirement to the oxygen quality in the oxygen-enriched combustion-supporting combustion method.The original patent of utility model people (patent No. 200510011541.5) is used the carrier of oxygen volume concentrations of a wind that strengthens partial concentration, and combine with the high temperature preheating technology, reached certain effect of economizing on oxygen, but shown that flow of oxygen is still very considerable after the practice.In addition, because the final carrier of oxygen volume concentrations of mixed airflow is to be formed by air and oxygen-enriched stream blending, air mass flow is relatively large, in order to reduce the oxygen rich air consumption, then needs to use purer oxygen.The higher oxygen of purity is very expensive, and the comparatively cheap oxygen of price generally has only the volumetric concentration of 30-40%, if with a large amount of air blending after can not reach the oxygen enrichment volumetric concentration of design.For reducing the service cost of oxygen, promote oxygen-enriched combustion technology, need the improvement oxygen-enriched combusting method badly.
The utility model content
The purpose of this utility model is the coal burner that proposes a kind of oxygen-enriched local combustion supporting, make its both obvious conserve oxygen consumption, strengthen the steady combustion ability of catching fire, can use the oxygen of comparatively economic medium body volume concentrations again, the conserve oxygen consumption, and then reduce operating cost.
The technical solution of the utility model is as follows:
A kind of coal burner of oxygen-enriched local combustion supporting, comprise airduct one time, be arranged on the dense-and-weak separator of an airduct back, light powder gas channel, dense powder gas channel, preheating chamber or precombustion chamber and combustion chamber is characterized in that: described light powder gas channel directly is communicated with described combustion chamber, described dense powder airflow line is communicated with described preheating chamber or precombustion chamber, near dense powder gas channel place the oxygen-enriched stream passage is set on preheating chamber or preheating chamber.
In the technique scheme, described oxygen-enriched stream passage adopts one or more, and the oxygen-enriched stream passage stretches into the degree of depth of preheating chamber or precombustion chamber less than 15cm.
Another technical characterictic of the present utility model is: be provided with on preheating chamber or precombustion chamber and regulate the wind inlet.
The utlity model has following advantage and beneficial effect: 1. owing to just increase the carrier of oxygen volume concentrations partly, but not oxygen-enriched stream is sneaked into wind one time, thereby reached the purpose of conserve oxygen consumption greatly.Directly feed in the recirculating zone or limited cavity of high temperature, high fuel concentration owing to oxygen simultaneously, oxygen keeps higher volumetric concentration level easily for a long time in certain zone, so combustion-supporting effect is obvious, not only combustion-supporting used oxygen volume flow can be very little, nor needs use the oxygen-enriched stream of high especially volumetric concentration, can use comparatively cheap oxygen source like this.2. simple to operation, be easy to be used with oil gun.
Description of drawings
Fig. 1 is a structural principle schematic diagram of the present utility model.
Among the figure: airduct road of 1-; The 2-light-dark separation device; The light powder gas channel of 3-; The dense powder gas channel of 4-; The 5-preheating chamber; The 6-combustion chamber; 7-regulates the wind inlet; 8-oxygen-enriched stream passage.
The specific embodiment
Below in conjunction with accompanying drawing operation principle of the present utility model, process and concrete enforcement are described further.
Fig. 1 is a structural principle schematic diagram of the present utility model.This coal burner comprises airduct 1 one time, is arranged on the dense-and-weak separator 2 of an airduct back, light powder gas channel 3, dense powder gas channel 4, preheating chamber or precombustion chamber 5 and combustion chamber 6; Light powder gas channel 3 directly is communicated with described combustion chamber 6, and dense powder airflow line 4 is communicated with described preheating chamber or precombustion chamber 5, near dense powder gas channel place oxygen-enriched stream passage 8 is set on preheating chamber or preheating chamber.Oxygen-enriched stream passage 8 can adopt one or more; Oxygen-enriched stream passage 8 does not need or only needs a little to stretch into preheating chamber or preheating chamber, is generally less than 15cm, is difficult for like this burning.In addition, behind flameholding, it is convenient to cut off oxygen-enriched stream, and can not exert an influence reliable, safety to whole flow field.
In addition, according to carrier of oxygen volume concentrations, fuel quality and the service condition of source of the gas, also can on preheating chamber or precombustion chamber, have and regulate wind inlet 7, in order to regulate the circulating flow strength in preheating chamber or the precombustion chamber.
Operation principle of the present utility model is as follows with the course of work: a general mood stream 1 that carries powder fuel enters combustion chamber 6 preceding elder generations and carries out deep or light the separation through light-dark separation device 2, it is divided into deep or light two strands, light powder air communication is crossed light powder gas channel 3 and is directly entered combustion chamber 6, dense powder air communication overrich powder gas channel 4 enters preheating chamber or precombustion chamber 5, in preheating chamber or precombustion chamber, form local decompression, high temperature gases recirculating in the suction combustion chamber, the solid particle that heating stops in this space.
Oxygen-enriched stream is injected in preheating chamber or the precombustion chamber by oxygen-enriched stream passage 8, local oxygen concentration improves rapidly, near preheating chamber or precombustion chamber outlet, form flammule, this flammule is very helpful to strengthening the steady combustion ability of catching fire of dense powder air-flow, because preheating chamber or precombustion chamber itself also have the suitable steady combustion performance of catching fire, the volume flow of oxygen-enriched stream and the requirement of carrier of oxygen volume concentrations are obviously reduced, and these two parameters can also be regulated according to the fuel type, oxygen source and the operating condition that use.
Carrier of oxygen volume concentrations in the oxygen-enriched stream passage is generally 25%-100%, and the muzzle velocity of air-flow is 15-30m/s, and flow can be regulated according to carrier of oxygen volume concentrations, fuel quality and the ruuning situation of source of the gas.
Claims (3)
1. the coal burner of an oxygen-enriched local combustion supporting, comprise an airduct (1), be arranged on the dense-and-weak separator (2) of an airduct back, light powder gas channel (3), dense powder gas channel (4), preheating chamber or precombustion chamber (5) and combustion chamber (6), it is characterized in that: described light powder gas channel directly is communicated with described combustion chamber, described dense powder gas channel is communicated with described preheating chamber or precombustion chamber, near dense powder gas channel place oxygen-enriched stream passage (8) is set on preheating chamber or preheating chamber.
2. according to the coal burner of the described a kind of oxygen-enriched local combustion supporting of claim 1, it is characterized in that: described oxygen-enriched stream passage adopts one or more, and the oxygen-enriched stream passage stretches into the degree of depth of preheating chamber or precombustion chamber less than 15cm.
3. according to the coal burner of claim 1 or 2 described a kind of oxygen-enriched local combustion supportings, it is characterized in that: on preheating chamber or precombustion chamber, be provided with and regulate wind inlet (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009203506429U CN201582812U (en) | 2009-12-28 | 2009-12-28 | Pulverized coal burner for oxygen-rich local combustion-supporting |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009203506429U CN201582812U (en) | 2009-12-28 | 2009-12-28 | Pulverized coal burner for oxygen-rich local combustion-supporting |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201582812U true CN201582812U (en) | 2010-09-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009203506429U Expired - Lifetime CN201582812U (en) | 2009-12-28 | 2009-12-28 | Pulverized coal burner for oxygen-rich local combustion-supporting |
Country Status (1)
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| CN (1) | CN201582812U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102494333A (en) * | 2011-11-14 | 2012-06-13 | 上海锅炉厂有限公司 | Anthracite-combusted single fire ball four-corner direct current burner |
| CN102563634A (en) * | 2011-11-14 | 2012-07-11 | 上海锅炉厂有限公司 | Coal dust thickness-thinness separating and distributing structure of single-fireball eight-corner direct-flow burner |
| CN102563635A (en) * | 2012-01-10 | 2012-07-11 | 西安交通大学 | Pulverized coal flame preheating combustion device |
| CN104807004A (en) * | 2015-04-15 | 2015-07-29 | 华南理工大学 | Rough and fine coal powder separating and combusting device in coal powder pipe |
| CN105452768A (en) * | 2013-08-05 | 2016-03-30 | 三浦工业株式会社 | Burner and boiler equipped with burner |
| CN106642096A (en) * | 2016-12-08 | 2017-05-10 | 哈尔滨工业大学 | Fuel graded local oxygen-enriched rotational flow pulverized coal burner |
-
2009
- 2009-12-28 CN CN2009203506429U patent/CN201582812U/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102494333A (en) * | 2011-11-14 | 2012-06-13 | 上海锅炉厂有限公司 | Anthracite-combusted single fire ball four-corner direct current burner |
| CN102563634A (en) * | 2011-11-14 | 2012-07-11 | 上海锅炉厂有限公司 | Coal dust thickness-thinness separating and distributing structure of single-fireball eight-corner direct-flow burner |
| WO2013071713A1 (en) * | 2011-11-14 | 2013-05-23 | 上海锅炉厂有限公司 | Thick-thin coal dust separation and arrangement structure for single-fireball eight-corner straight-flow burner |
| CN102563634B (en) * | 2011-11-14 | 2015-02-18 | 上海锅炉厂有限公司 | Coal dust thickness-thinness separating and distributing structure of single-fireball eight-corner direct-flow burner |
| EP2781833A4 (en) * | 2011-11-14 | 2015-07-08 | Shanghai Boiler Works Co Ltd | Thick-thin coal dust separation and arrangement structure for single-fireball eight-corner straight-flow burner |
| CN102563635A (en) * | 2012-01-10 | 2012-07-11 | 西安交通大学 | Pulverized coal flame preheating combustion device |
| CN102563635B (en) * | 2012-01-10 | 2013-12-11 | 西安交通大学 | Pulverized coal flame preheating combustion device |
| CN105452768A (en) * | 2013-08-05 | 2016-03-30 | 三浦工业株式会社 | Burner and boiler equipped with burner |
| CN104807004A (en) * | 2015-04-15 | 2015-07-29 | 华南理工大学 | Rough and fine coal powder separating and combusting device in coal powder pipe |
| CN106642096A (en) * | 2016-12-08 | 2017-05-10 | 哈尔滨工业大学 | Fuel graded local oxygen-enriched rotational flow pulverized coal burner |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100915 |
|
| CX01 | Expiry of patent term |