CN2259555Y - Swirl pulverized-fuel pre-combustion chamber combustor - Google Patents
Swirl pulverized-fuel pre-combustion chamber combustor Download PDFInfo
- Publication number
- CN2259555Y CN2259555Y CN 95237822 CN95237822U CN2259555Y CN 2259555 Y CN2259555 Y CN 2259555Y CN 95237822 CN95237822 CN 95237822 CN 95237822 U CN95237822 U CN 95237822U CN 2259555 Y CN2259555 Y CN 2259555Y
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- precombustion chamber
- air
- chamber
- tertiary air
- utility
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Abstract
The utility model relates to a coal powder burner with a precombustion chamber which is composed of a spiral casing cyclone, a precombustion chamber and an air port. Primary air and coal powder mixture are injected from the root of the precombustion chamber through the spiral casing cyclone. Secondary air is injected from the middle part of the precomcustion chamber in a tangential direction. The circular cross section of an outlet of the precombustion chamber is provided with tertiary air which blows straightly, the air port of the tertiary air forms an angle alpha with the axial line of the precombustion chamber and the angle alpha is larger than or equal to 0 DEG and smaller than 30 DEG. The secondary air and the tertiary air share one air inlet of which the distribution ratio is regulated by an adjusting valve. The utility model has the advantages of easy ignition, stable combustion, adjustable flame length and easy processing and installation. The utility model can meet the requirements of various heating technologies and can be applied to various coal-burning industrial furnaces.
Description
The utility model belongs to coal powder burner, especially has the coal powder burner of precombustion chamber.
The spiral coal powder burner ignition difficulties that generally adopts on industrial furnace is difficult to smooth combustion under underload at present, and simultaneously, coal dust firing is incomplete, and burn-out degree is low, and black smoke is serious, serious environment pollution." power engineering " 1983 (1) P17-23 " experimental study of coal dust pre-combustion chamber burner " have proposed improvement project, and the burner structure that it proposed is seen accompanying drawing 4.Its workflow is: the wind powder mixture of a wind rotates into precombustion chamber through axial guide vane cyclone, indoor for entrainmenting to the backflow flue gas heating of flame root and catching fire.Burning edge in wind powder mixture limit the lining motion of corkscrewing, and closes on the precombustion chamber exit, and the secondary wind that is rotated mixes, and the high-temp combustion torch of generation is sent into burner hearth and continued to burn.This scheme has solved catching fire of coal dust to a certain extent and has burnt problem, but (S (0.6) also do not have to solve accumulated powder and slagging scorification problem in the precombustion chamber, and this device only uses on heavy duty boiler also at all owing to swirl strength in the precombustion chamber is too low.
The purpose of this utility model is exactly at the problems referred to above, seeks a kind of igniting that is easy to, and even also can not light with oil gun, flameholding, burn-out degree height, energy-saving spiral-flow type coal dust pre-combustion chamber burner, and accumulated powder in the solution precombustion chamber and slagging scorification problem, enlarge the use field.
The purpose of this utility model be achieved in that burner mainly by spiral case cyclone, precombustion chamber, and the air port form.Wind and coal dust rotate into precombustion chamber through the spiral case cyclone from the root of precombustion chamber, the precombustion chamber shell is welded by multilayer steel plates, be provided with two between steel plate, the tertiary air air channel, empty cylindrical structure in the precombustion chamber, liner is built by laying bricks or stones by refractory material, shell can be designed to octagonal, circle or other polygon according to actual conditions, and secondary wind tangentially is blown into by the air port that is positioned at the precombustion chamber middle part, be symmetrically distributed through the air channel.The root of the through precombustion chamber in high temperature gases recirculating zone that primary and secondary air forms, coal dust is promptly heated by high temperature gases recirculating and lights a fire once spraying into precombustion chamber, coal dust and air be abundant mixing and burning in strong rotation, export in precombustion chamber, tertiary air by the wall self-preheating is through being distributed in the air port on the precombustion chamber outlet refractory material ring section, to be the direction direct projection at α angle (0 °≤α＜30 °) to flame with the precombustion chamber axis, the coal dust that does not burn further mixes with air, generate the burning torch of high temperature, enter the industrial furnace burner hearth and continue to burn.Two, the shared inlet of tertiary air is provided with the adjusting valve plate in the porch, with regulate two, the allocation proportion of tertiary air, by regulate two, the allocation proportion of tertiary air can suitably adjust the length of flame, to satisfy the requirement of different heating technology.Spiral case cyclone central part is provided with a fire hole, when needing igniting, with oily cotton yarn torch thus fire hole introduce precombustion-chamber ignition, after igniting is finished, only need the igniting port lid covered and get final product.
The utility model compared with prior art has the following advantages and good effect:
1, the igniting of this burner is easy, flameholding, stove quick heating.When common coal burner is lighted a fire, not only need a large amount of timber, expend lot of manpower and material resources, and produce a large amount of flue dust, influence operating personnel's physical and mental health, also environment is polluted.The utility model is owing to adopt the spiral case cyclone, its swirl strength is big, secondary wind adopts tangentially again and sprays into, and these two strands of wind rotation strongly in the same way, more increased the swirl strength of pre-burning indoor air flow, this strand high temperature gases recirculating has played the effect of a stable incendiary source, therefore coal dust promptly is heated and lights once spraying into precombustion chamber, igniting is easy to, it is also very stable to burn, and under the situation of black furnace, can light burner in 1～2 minute with oily cotton yarn torch, got final product smooth combustion in about 10 minutes, afterburner flame export temperature can reach more than 1300 ℃ in 15 minutes.
2, coal dust burn-out degree height.Because the abundant mixing of strong eddy flow in the precombustion chamber, the high-temperature flue gas of backflow has guaranteed the abundant burning of coal dust to add the introducing of tertiary air as stable incendiary source, has further improved the burn-out degree of coal dust.Through the lime-ash sample analysis to 1.5 meters of burner outlet, the lime-ash carbon residue only has 0.6%.
3, load regulation range is wide.Through the performance of 500Kg/h burner is tested, its ability can change in the scope of 150-800Kg/h, and its load regulation rate is 800/150 ≈ 5, can adapt to the different requirements of furnace output.
4, the length of flame is adjustable.By regulate two, the allocation proportion of tertiary air, can suitably adjust the length of flame, to satisfy the requirement of different heating technology.
5, environment protecting is good.This burner uses lower air coefficient, and three grades of burnings have suppressed the generation of NOx, have reduced the content of the NOx in the flue gas.Simultaneously, because strong swirl flow combustion, coal dust and air fully mix, and have destroyed the formation condition of carbon black, have suppressed the generation of dust, so do not have carbon black substantially in the flue gas, and cigarette is white in color, and dustiness seldom.
6, not accumulated powder, not slagging scorification in the precombustion chamber.Because the ash effect of boasting of the strong rotation of pre-burning indoor air flow makes indoor not dust stratification, owing to introduced tertiary air, realizes multistage combustion, the pre-burning indoor temperature is not high, also can slagging scorification.
7, simple in structure, processing and fabricating is easy, and is easy to install.Can be used for boiler, heater for rolling steel, also can be used for other various coal-fired industry furnaces.
Below in conjunction with drawings and Examples the utility model is described in further detail:
Fig. 1 is the utility model structural representation.
Fig. 2 is the I-I profile of Fig. 1.
Fig. 3 is the II one II profile of Fig. 1.
Fig. 4 is the prior art constructions schematic diagram.
By accompanying drawing as can be known, the utility model is mainly by spiral case cyclone 1, and precombustion chamber 2 two large divisions form.Spiral case cyclone 1 is welded by steel plate, the centre is provided with fire hole 6, wind, a coal dust intermixture enter cyclone by inlet 9 and spray into precombustion chamber 2, the backflow flue gas heating of wind coal dust intermixture strong rotation in spraying into promptly by precombustion chamber is also caught fire, a wind accounts for the 15-30% of total blast volume, wind speed 10-25m/s.The shell of precombustion chamber 2 is welded by multilayer steel plates, be provided with secondary wind air channel 7 and tertiary air air channel 8 between steel plate, in be lined with the thick refractory material of 50-100mm, precombustion chamber length and diameter ratio L/D=0.6-1.5, the precombustion chamber inwall is provided with 1-4 tangential secondary wind air port 3, accounts for the secondary wind of total blast volume 40-50%, and the wind speed with 30-65m/s tangentially enters in the precombustion chamber thus, powerful secondary wind drives wind, a coal dust intermixture and rotates strongly, fully mixes and burns.The refractory material ring section of precombustion chamber outlet be provided with a plurality of uniform, be tertiary air air port 4 (0 °≤α＜30 °), that the cross section equates, α angle with the precombustion chamber axis, tertiary air is a direct current wind, accounts for the 25-35% of total blast volume, wind speed 20-65m/s.Tertiary air is directly injected flame with the α angle behind the wall self-preheating, the coal dust that does not burn is further mixed with air, produces the burning torch of high temperature.Two, the shared inlet of tertiary air is provided with in the porch and regulates valve plate 5, and when needs were regulated, the position of change adjusting valve plate 5 can control two, the allocation proportion of tertiary air, made the length of flame adjusted, to satisfy the requirement of different heating technology.
Type approval test of the present utility model is used for the heater for rolling steel in Φ 530 cogging workshops, replace four 300Kg/h spiral coal powder burners of former heating furnace with the utility model burner of two 500Kg/h, solved the difficult problem of former burner igniting, use the utility model, no longer need a large amount of timber and oil during igniting, also no longer cause environmental pollution, only can light with a little oil cotton yarn.Simultaneously, furnace output, steel billet heating quality, coal burn-out degree have all improved, and the oxidization burning loss of steel billet reduces.
Type approval test of the present utility model also is used for boiler (4T/h, 6T/h) | transforms, burner of the present utility model and fire grate multifuel combustion with a 200Kg/h, average energy-conservation 25%, flameholding, boiler output improves, and has also solved the difficult problem that the low capacity boiler can not adopt the coal dust torch burning simultaneously.
The utility model is applicable to various coal-fired industry furnaces.
Claims (1)
1, a kind of spiral-flow type coal dust pre-combustion chamber burner, mainly by the spiral case cyclone, precombustion chamber and air port are formed, it is characterized in that: spiral case cyclone (1) is arranged on the root of precombustion chamber (2), the precombustion chamber shell is welded by multilayer steel plates, be provided with two between steel plate, the tertiary air air channel, cylindrical structure in the precombustion chamber, inner lining refractory, shell can be made into octagonal according to actual conditions, circle or other polygon, secondary wind air port (3) is arranged at the precombustion chamber middle part, it is 1 to 4, its outlet is tangent with the precombustion chamber inwall, tertiary air air port (4) is arranged on the ring section of precombustion chamber outlet, is identical little air ports, a plurality of equally distributed cross sections, and its outlet is the α angle with the precombustion chamber axis, 0 °≤α＜30 °, two, the shared air inlet of tertiary air regulates two by regulating valve plate (5), the allocation proportion of tertiary air, spiral case cyclone central part is provided with fire hole (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95237822 CN2259555Y (en) | 1995-10-18 | 1995-10-18 | Swirl pulverized-fuel pre-combustion chamber combustor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 95237822 CN2259555Y (en) | 1995-10-18 | 1995-10-18 | Swirl pulverized-fuel pre-combustion chamber combustor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2259555Y true CN2259555Y (en) | 1997-08-13 |
Family
ID=33880424
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 95237822 Expired - Lifetime CN2259555Y (en) | 1995-10-18 | 1995-10-18 | Swirl pulverized-fuel pre-combustion chamber combustor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2259555Y (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101684939B (en) * | 2008-08-11 | 2011-11-23 | 乔治洛德方法研究和开发液化空气有限公司 | Method and system for burning solid fuel in industrial furnace |
| CN102032566B (en) * | 2009-09-27 | 2013-06-12 | 烟台龙源电力技术股份有限公司 | Pulverized coal burner and boiler with same |
| CN107504488A (en) * | 2017-08-31 | 2017-12-22 | 华电国际电力股份有限公司山东分公司 | Depth peak regulation combines steady burning burner |
| CN107642779A (en) * | 2017-11-02 | 2018-01-30 | 大峘集团有限公司 | A kind of environment-protecting energy-saving type briquette fine coal air burner |
| CN108317510A (en) * | 2018-03-29 | 2018-07-24 | 西安交通大学 | A kind of low NO of remote burnout degree two level eddy flow wide regulating ratioxBurner |
| CN108870740A (en) * | 2018-09-12 | 2018-11-23 | 无锡博众热能环保设备有限公司 | A kind of multichannel fuel gas hot-blast stove |
| CN109459525A (en) * | 2018-12-27 | 2019-03-12 | 山东宏业纺织股份有限公司 | A kind of device and test method improving flame-retardant yarn flame retardant property testing precision |
-
1995
- 1995-10-18 CN CN 95237822 patent/CN2259555Y/en not_active Expired - Lifetime
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101684939B (en) * | 2008-08-11 | 2011-11-23 | 乔治洛德方法研究和开发液化空气有限公司 | Method and system for burning solid fuel in industrial furnace |
| CN102032566B (en) * | 2009-09-27 | 2013-06-12 | 烟台龙源电力技术股份有限公司 | Pulverized coal burner and boiler with same |
| CN107504488A (en) * | 2017-08-31 | 2017-12-22 | 华电国际电力股份有限公司山东分公司 | Depth peak regulation combines steady burning burner |
| CN107642779A (en) * | 2017-11-02 | 2018-01-30 | 大峘集团有限公司 | A kind of environment-protecting energy-saving type briquette fine coal air burner |
| CN107642779B (en) * | 2017-11-02 | 2024-01-19 | 大峘集团有限公司 | Environment-friendly energy-saving pulverized coal gas burner |
| CN108317510A (en) * | 2018-03-29 | 2018-07-24 | 西安交通大学 | A kind of low NO of remote burnout degree two level eddy flow wide regulating ratioxBurner |
| CN108870740A (en) * | 2018-09-12 | 2018-11-23 | 无锡博众热能环保设备有限公司 | A kind of multichannel fuel gas hot-blast stove |
| CN109459525A (en) * | 2018-12-27 | 2019-03-12 | 山东宏业纺织股份有限公司 | A kind of device and test method improving flame-retardant yarn flame retardant property testing precision |
| CN109459525B (en) * | 2018-12-27 | 2024-01-19 | 山东宏业纺织股份有限公司 | Device for improving flame retardant property test accuracy of flame retardant yarns |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |