CN1020952C - Double primary air channel pulverized coal main burner and method for designing and modifying four-corner tangential burner - Google Patents
Double primary air channel pulverized coal main burner and method for designing and modifying four-corner tangential burner Download PDFInfo
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- CN1020952C CN1020952C CN 91105899 CN91105899A CN1020952C CN 1020952 C CN1020952 C CN 1020952C CN 91105899 CN91105899 CN 91105899 CN 91105899 A CN91105899 A CN 91105899A CN 1020952 C CN1020952 C CN 1020952C
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- Prior art keywords
- burner
- wind
- primary air
- coal
- speed control
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- 239000003245 coal Substances 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title claims description 15
- 240000004282 Grewia occidentalis Species 0.000 title abstract 2
- 239000002817 coal dust Substances 0.000 claims description 28
- 239000000843 powder Substances 0.000 abstract description 19
- 238000002485 combustion reaction Methods 0.000 abstract description 16
- RHZUVFJBSILHOK-UHFFFAOYSA-N anthracen-1-ylmethanolate Chemical compound C1=CC=C2C=C3C(C[O-])=CC=CC3=CC2=C1 RHZUVFJBSILHOK-UHFFFAOYSA-N 0.000 abstract description 5
- 239000003830 anthracite Substances 0.000 abstract description 5
- 238000004939 coking Methods 0.000 abstract description 5
- 238000010304 firing Methods 0.000 abstract description 4
- 238000000926 separation method Methods 0.000 abstract description 3
- 238000010790 dilution Methods 0.000 abstract 1
- 239000012895 dilution Substances 0.000 abstract 1
- 230000001131 transforming effect Effects 0.000 description 7
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 6
- 230000000087 stabilizing effect Effects 0.000 description 6
- 239000003546 flue gas Substances 0.000 description 5
- 238000001816 cooling Methods 0.000 description 4
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000012467 final product Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000003134 recirculating effect Effects 0.000 description 2
- 239000000779 smoke Substances 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 240000004859 Gamochaeta purpurea Species 0.000 description 1
- 230000001464 adherent effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000010992 reflux Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
A high-speed control jet flow channel is arranged on the outer side of a primary air channel, control jet flow and primary air powder respectively enter a limited space of a combustor through the control jet flow channel and the primary air channel at the speed of 0-sonic speed, the speed ratio of the control jet flow and the primary air powder is generally 0-17, the combustor is convenient for the reconstruction of a four-corner tangential firing boiler, a water-cooled wall close to the combustor does not need to be removed, and a new powder feeder and a new coal powder pipe do not need to be added. The burner not only solves the problem of stable combustion, realizes the separation of coal powder concentration and dilution, and reduces NOxAnd the combustion efficiency is greatly improved, the combustion efficiency can be greatly improved for the hard-to-burn anthracite, and the problem of coking is avoided.
Description
The present invention relates to field of combustion technology, particularly relate to the burner of combusting coal fines.
China is to be the country of main fuel with the coal, and coal is changeable, wherein therefore anthracite catches fire because its volatile content is low, surely fires performance and efficiency of combustion inequality, general at present with the burned anthracite of W shape flame furnace ability, and tangentially fired boiler because its combustibility is poor, should not burn this coal, but the cost of tangential firing furnace is low, and is therefore attractive.Domestic at present, the outer novel burner of being invented, as: the patent No. is 86106725 flame stabilizing method of flat efflux and device (see figure 2) thereof, the patent No. is that 87102139 Baised jet flame stabilizing methods and device (see figure 3) and the patent No. are CN85100050 intensified synclastic fluid flame stabilization and burner thereof, they all are to solve stable combustion problem emphatically, and can't solve the efficiency of combustion problem of anthracite-fired boiler, and when transforming old stove and the new stove of design, generally all will move water-cooling wall and add four for tube cell and four machine supplying powders, increased difficulty to transforming tangentially fired boiler.
The problems referred to above at the prior art existence, the object of the present invention is to provide a kind of coal dust main burner and the burner design of four jiaos of tangential pulverized coal firing boiler layouts and method of transformation with two wind passages in the same way, stable combustion problem can be solved, efficiency of combustion can be improved again.
In order to achieve the above object, the present invention has taked following technical measures: a kind of double-primary-air duct coal dust main burner is provided, it has two wind passage (see figure 1)s in the same way, the outside at two wind passages, one or more High-speed Control fluidic channel are set, distance H and a wind channel height h ratio between two wind passage axis, general H/h 〉=3.This burner is all very convenient to transforming the new tangentially fired boiler of old and design, to a traditional rectangular jet of tangentially fired boiler make two wind passages into or with upper and lower two rectangular jets in four angles of tangentially fired boiler as two wind passages, inwall between last, last two rectangular jets is got through, establish the High-speed Control fluidic channel in the outside of a wind passage, promptly become the coal dust main burner of double-primary-air duct of the present invention.
The coal dust main burner of double-primary-air duct of the present invention is compared with burners in prior and is had the following advantages:
1, the present invention can make the coal dust of each burner ejection catch fire in advance and thereby overheavy firing reaches the double purpose of can surely fire and can improve efficiency of combustion, and burners in prior, as: flat mouth steady cube method of jet flame and device (see figure 2) thereof, Baised jet flame stabilizing method and device (see figure 3) and intensified synclastic fluid flame stabilization and burner thereof all can only reach the purpose of steady combustion.
2. coking takes place (see Fig. 2, Fig. 3), this is the result who washes away A, B place wall owing to burner hearth high-temperature flue gas and high temperature coal dust in be everlasting in long-time running A, B place of flat mouthful steady cube method of jet flame and device thereof, steady cube method of Baised jet flame and device thereof.And in the main burner of of the present invention two wind passages, this wall has been replaced by primary wind and powder, promptly two strands of primary wind and powders have occupied the position that the other side can produce coking wall place mutually, so the high-temperature flue gas and the high temperature coal dust that reflux are used for heating primary wind and powder, it is caught fire in advance not only avoided coking but also made full use of the heat of backflow flue gas and coal grain.
3. flat mouth jet flame antihunt means and device and Baised jet flame stabilizing method and device thereof, transforming old boiler and designing new boiler and will adorn four machine supplying powders and four coal pipes often in addition, bring difficulty for like this transformation old boiler, adopt burner of the present invention then not need to increase machine supplying powder and coal pipe.
4. flat mouth jet flame antihunt means and device and Baised jet flame stabilizing method and device thereof, when transforming old boiler and design new boiler, the water-cooling wall that all requires to close on burner is removed, thereby to transforming the next difficulty in old furnace zone.And during with the coal dust main burner of two wind passages of controlled backflow of the present invention, then do not need mobile water-cooling wall.
5. burner of the present invention has wider capacity of returns adjustable range, and the ratio of its High-speed Control effluxvelocity and primary wind and powder speed can adapt to the needs of various coals between 0～17.
6. dense, the light separation of Chang Gui coal dust is finished by mechanical means in the burner outside, and this mechanical means is difficult to the control ratio of coal powder density at the scene, can not adapt to the ever-changing of coal and service condition.
The present invention then utilizes the method that changes the control jet flow, has both changed the smoke backflow amount, and it is dense and lightly realize dense, the light separation that in burner its control method is easy to control coal dust again, reliably.
Accompanying drawing
Fig. 1. a kind of coal dust main burner structural representation of double-primary-air duct,
Fig. 2. flat mouth jet flame antihunt means and apparatus structure schematic diagram thereof,
Fig. 3. Baised jet flame stabilizing method and device schematic diagram thereof,
Fig. 4. according to the present invention four jiaos of rectangular jets of boiler of arranging burner are changed into two wind passage coal dust main burner schematic diagrames.
Accompanying drawings concrete structure of the present invention.A kind of double-primary-air duct coal dust main burner provided by the present invention, it has two a wind passage (1) (see figure 1)s in the same way, the outside at two wind passages (1), one or more High-speed Control fluidic channel (2) are set, a distance H and a wind passage (1) height h ratio between two wind passages (1) axis, general H/h 〉=3.The confined space that primary wind and powder enters main burner (3) through a wind passage (1), the confined space that control jet enters main burner (3) with the speed of 0-velocity of sound by control jet passage (2), the ratio of High-speed Control jet and primary wind and powder speed is between 0～17, fat coal is got lower bound, and a low performance part coal is got high limit.When speed ratio≤2, make control jet with secondary wind (7) and get final product.
Primary air jet contains air and coal dust, and the High-speed Control jet can be air or steam.Because the injection of primary air jet itself and the strong ejector action of High-speed Control jet, then form the strong center recirculating zone at coal dust main burner (3) middle part of double-primary-air duct (1), make that burner hearth (5) high-temperature flue gas (4) is counter to flow in the burner (3), catch fire thereby make upper and lower two strands of coal dusts all be subjected to heating.Therefore in burner of the present invention, the flow that can change the High-speed Control jet changes the capacity of returns of high-temperature flue gas, to adapt to the changeable needs of coal.In order to guarantee the smooth combustion of coal dust, this burner (3) only need make coal dust, and burner hearth (5) is preceding to be reached or gets final product near ignition temperature entering, needn't make coal dust in main burner (3) internal combustion, can change the degree of smoke backflow amount and Pulverized Coal Concentration by the flow of regulating the High-speed Control jet, thereby reach the purpose of control ignition point position.Because upper and lower two strands of wind coal dusts are all shifting to an earlier date fire burns,, eliminated " black outstanding " so this invention burner (3) can make anthracite catch fire in advance, strengthened burning.
The present invention is because the strong ejector action of High-speed Control jet, air in the primary wind and powder is attracted by high-speed jet and cause adherent jet, thereby cooling and wash away the diapire face makes it to avoid bottom coking and overheated.And coal dust is because inertia is big, and most of coal dust enters in the high temperature recirculation zone because of the inertia moving linearly, thereby causes wind, powder to separate, realize dense, light burning, favourablely catches fire, burns.And the coal dust of enrichment enters in the recirculating zone of high-temperature combustion product of anoxic, thereby will reduce the NO that is produced by fuel bound nitrogen significantly
XGrowing amount.Utilize the method that changes the control jet flow to reach control NO
XGrowing amount is an important feature of the present invention.
The coal dust main burner (3) of two wind passages (1), all very convenient to transforming the new tangentially fired boiler of old and design, internal face between upper and lower two traditional rectangular spouts (6) can be got through tangentially fired boiler, at its lateral surface High-speed Control fluidic channel (2) is housed, promptly become coal dust main burner (3), need not increase new machine supplying powder and coal pipe and get final product with double-primary-air duct (1).Also needn't move water screen tube, it is convenient to transform like this, easily promotes.
Also a traditional rectangular jet of tangentially fired boiler (6) can be made into two wind passages (1) (see figure 4) in addition, arranged outside High-speed Control fluidic channel (2) at a wind passage (1), promptly become this coal dust main burner (3) with double-primary-air duct (1), so only pass through bifurcated coal pipe (8), the confined space that wind coal dust (dense, light do not limit) is entered burner (3) through a wind passage (1) with an existing machine supplying powder.
All can transform combination for all the traditional burners on four angles of tangentially fired boiler by requirement of the present invention, thereby the coal dust that makes each burner ejection all catches fire in advance, burns, this has not only improved the stability (even under 50% underload also can smooth combustion) of burning, and makes the anthracite that is difficult to burn can significantly improve efficiency of combustion.
Claims (2)
1, a kind of coal dust main burner, form by wind passage and High-speed Control fluidic channel, it is characterized in that this burner has two wind passages (1) in the same way, at least be provided with a High-speed Control fluidic channel (2) in the outside of a wind passage (1), the distance H between two wind passages (1) axis compares more than or equal to 3 with a wind channel height h.
2, a kind of to design with transform the method for the burner that four jiaos of tangential pulverized-coal fired boilers arrange, it is characterized in that four jiaos of traditional up and down rectangular jets (6) of boiler as two wind passages (1), get through at the inwall between two rectangular jets (6) up and down, establish High-speed Control fluidic channel (2) in the outside of a wind passage (1) or the rectangular jet (6) that square boiler is traditional makes two wind passages (1) into, establish High-speed Control fluidic channel (2) in the outside of a wind passage (1), promptly become the coal dust main burner of double-primary-air duct of the present invention (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91105899 CN1020952C (en) | 1991-08-29 | 1991-08-29 | Double primary air channel pulverized coal main burner and method for designing and modifying four-corner tangential burner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 91105899 CN1020952C (en) | 1991-08-29 | 1991-08-29 | Double primary air channel pulverized coal main burner and method for designing and modifying four-corner tangential burner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1059022A CN1059022A (en) | 1992-02-26 |
| CN1020952C true CN1020952C (en) | 1993-05-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 91105899 Expired - Fee Related CN1020952C (en) | 1991-08-29 | 1991-08-29 | Double primary air channel pulverized coal main burner and method for designing and modifying four-corner tangential burner |
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| Country | Link |
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| CN (1) | CN1020952C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100357599C (en) * | 1999-09-03 | 2007-12-26 | 巴克斯特国际公司 | Systems and methods for control of pumps |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105465814A (en) * | 2015-03-30 | 2016-04-06 | 无锡华光锅炉股份有限公司 | Branched structure of primary air pulverized coal pipe |
| CN107246607B (en) * | 2017-07-06 | 2023-05-30 | 山西大学 | Automatic stable combustion system for four-corner tangential boiler |
-
1991
- 1991-08-29 CN CN 91105899 patent/CN1020952C/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100357599C (en) * | 1999-09-03 | 2007-12-26 | 巴克斯特国际公司 | Systems and methods for control of pumps |
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| Publication number | Publication date |
|---|---|
| CN1059022A (en) | 1992-02-26 |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C15 | Extension of patent right duration from 15 to 20 years for appl. with date before 31.12.1992 and still valid on 11.12.2001 (patent law change 1993) | ||
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| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |