CN101220954A - Combustor and combustion method for pure burning blast furnace gas or low-calorific value gas - Google Patents
Combustor and combustion method for pure burning blast furnace gas or low-calorific value gas Download PDFInfo
- Publication number
- CN101220954A CN101220954A CNA2008100330932A CN200810033093A CN101220954A CN 101220954 A CN101220954 A CN 101220954A CN A2008100330932 A CNA2008100330932 A CN A2008100330932A CN 200810033093 A CN200810033093 A CN 200810033093A CN 101220954 A CN101220954 A CN 101220954A
- Authority
- CN
- China
- Prior art keywords
- gas
- pipe
- air
- burner
- low
- 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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/20—Non-premix gas burners, i.e. in which gaseous fuel is mixed with combustion air on arrival at the combustion zone
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C7/00—Combustion apparatus characterised by arrangements for air supply
- F23C7/002—Combustion apparatus characterised by arrangements for air supply the air being submitted to a rotary or spinning motion
- F23C7/004—Combustion apparatus characterised by arrangements for air supply the air being submitted to a rotary or spinning motion using vanes
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combustion Of Fluid Fuel (AREA)
Abstract
The invention relates to a burner used for pure burning blast furnace gas or low heat-value gas. The invention is characterized in that the burner consists of a gas pipe, an air pipe, gas vanes, air vanes, a flexible port, an ignition gas gun and a high energy ignition gun. A spout of an air intake pipe is connected with the flexible port. A gas intake pipe is arranged in the air intake pipe which is concentric with the gas intake pipe. The ignition gun and the high energy ignition gun are arranged in a central pipe of the gas pipe. At the spout of the gas pipe and the air pipe, axial or tangential-direction gas vanes are equally arranged between the gas pipe and the central pipe and axial or tangential-direction air vanes are equally arranged between the gas pipe and the air pipe. The burning method of the invention is characterized in that burners which are one-to-one corresponding to each other are arranged on both the front and back walls of a boiler hearth so as to adopt the front and back walls opposed firing technique. The burner has the advantages that the blast furnace gas which cannot be utilized and is vented before can be thoroughly utilized now.
Description
Technical field
The present invention relates to the burner and the combustion method of a kind of pure burning blast-furnace gas or low-heat value gas, the boiler that is used for 50MW～300MW unit fully burning blast-furnace gas or low-heat value gas, the thermal power of single burner is 4.0MW～30.0MW, to adapt to the requirement of maximization high parameter burning blast furnace gas and other low calorific value coal gas boilers, belong to the boiler-burner technical field.
Background technology
Along with the development that China's steel and iron industry is advanced by leaps and bounds, blast furnace gas that produces in the metallurgical process and low-heat value gas output improve greatly, and the caloric value of blast furnace gas or low-heat value gas is more and more lower.Nineteen sixty-five blast furnace gas the about 4180kJ/m of mean calorie
3, the mean calorie of blast furnace gas in 2006 has been reduced to 3135kJ/m
3Except using the multifuel combustion method, promptly mix and improve calorific value with coke-stove gas or coal gas of converter, in iron and steel enterprise's internal process, spend outside about 50%, can't effectively utilize and diffuse near half blast furnace gas.The blast furnace gas that diffuses has not only polluted environment, and has wasted the energy.Yet blast furnace gas is made fuel because its caloric value is very low, and the stability of burning is to limit the key of its trans-utilization.In the past with the way of mixing in the coal-powder boiler with the coal multifuel combustion, the established angle of the blade that uses in the burner is less than 40 degree, because the thermodynamic property of blast furnace gas or low-heat value gas and coal dust differs too big, mix burn a small amount of (with heat Calculation) blast furnace gas and low-heat value gas still can, surpass the operational factor and the safety economy that can have a strong impact on boiler after a certain amount of.
Summary of the invention
The purpose of this invention is to provide a kind of the having of station boiler of being used for than the pure burning blast-furnace gas of intense steady combusting ability or the burner and the combustion method of low-heat value gas.
For realizing above purpose, technical scheme of the present invention provides the burner of a kind of pure burning blast-furnace gas or low-heat value gas, it is characterized in that, by gas pipe, air hose, the coal gas blade, air blades, the convergent-divergent enlarging, the igniting air gun, high-energy firing gun is formed, the spout of air intlet pipe is connected with the convergent-divergent enlarging, the gas inlet pipe is located in the air intlet pipe, with gas inlet pipe concentric shafts, igniting air gun and high-energy firing gun are located in the central tube of gas pipe, spout place at gas pipe and air hose, between gas pipe and central tube, evenly be provided with axial or tangential coal gas blade, between gas pipe and air hose, evenly be provided with axially or the tangential air blade.
Described coal gas blade is the 8-25 sheet, and the established angle of coal gas blade is 45 degree～70 degree; Described air blades is the 10-30 sheet, and the established angle of air blades is 45 degree～70 degree.
The combustion method of the burner of a kind of pure burning blast-furnace gas or low-heat value gas, it is characterized in that, on the front-back wall of boiler furnace, arrange burner one to one, adopt front-back wall opposed firing technology, gas exit speed is 15～40m/s, and air outlet slit speed is 20～60m/s.
Burner of the present invention adopts the bispin flow structure of coal gas and air, the center is provided with igniter, the rotation of coal gas and air reaches by axial or tangential guide vane, on the front-back wall of burner hearth, arrange burner one to one, adopt front-back wall opposed firing technology, produce bispin plane of flow flame, reach the purpose of the overheavy firing and the retention flame, realize safety, economy and the efficient burning of blast furnace gas or low-heat value gas by the rotation of jet.
Burner forces it to rotate by axial or tangential guide vane before jet leaves spout, after air-flow breaks away from from spout, owing to lost the effect of contraction of spout wall, under the synergy of centrifugal force and inertia force, one expands in quiescent atmosphere, the one side rotation is advanced, and forms rotating jet.Rotating jet enters the burner hearth large space from burner nozzle, no longer is subjected to the constraint of channel wall and freely expands, and strong rotating jet flow field generally includes two recirculating zones, i.e. exteenal reflux district and recirculating zone, center.
The exteenal reflux district is that rotating jet entrainments external agency and the recirculating zone that forms at the jet boundary place strongly.Consider that from tissue burning angle the exteenal reflux district can guarantee that jet has suitable extended corner, and can heat the burner outlet air-flow by the backflow of high-temperature flue gas, to catching fire and certain effect has been played in smooth combustion.
Because the effect of eddy flow is in the inner recirculating zone, a center that occurs of rotating jet.In the recirculating zone, center, the high-temperature flue gas that the downstream, flow field has been taken fire entrainments near burner outlet, and exit flow directly ignites.The burning of warm, pyrolytic process, volatile matter and fixed carbon that the fuel fire initial stage is taken place and the generative process of pollutant mainly are in the recirculating zone, center and boundary vicinity carries out.So the recirculating zone, center plays a part even more important in combustion process comparatively speaking.
The characteristic of recirculating zone, center has very important significance to fuel fire and flame stabilization, considers that from the angle of burning and safety closed and full-open type air-flow is not desirable air flow structure.The former recirculating zone is too small, and is less to the effect of catching fire and surely fire; Though latter recirculating zone is very big, back-flow velocity is low, and it is few to entrainment the high-temperature flue gas amount, and flame pastes wall and be easy to burn out spout, causes slagging scorification.And no matter open type swirling eddy structure is from combustion stability or safety in operation, and effect all is more satisfactory.
Technical essential of the present invention is exactly by optimizing the design of burner, comprise and optimize the geometry that burner outlet revolves mouth, and the speed of optimizing burner outlet coal gas and air, reach desirable open type swirling eddy structure, obtain technical parameters such as rational reflux area length, recirculating zone width, back-flow velocity and reflux ratio.
Advantage of the present invention is to make full use of the blast furnace gas that can't effectively utilize originally and diffuse.
Description of drawings
Fig. 1 is the burner structure schematic diagram of a kind of pure burning blast-furnace gas or low-heat value gas;
Fig. 2 is the A-A cutaway view.
The specific embodiment
The invention will be further described below in conjunction with drawings and Examples.
Embodiment
As Fig. 1, shown in 2, burner structure schematic diagram for a kind of pure burning blast-furnace gas or low-heat value gas, the burner of described a kind of pure burning blast-furnace gas or low-heat value gas is by gas pipe 1, air hose 2, coal gas blade 3, air blades 4, convergent-divergent enlarging 5, igniting air gun 6, high-energy firing gun 7 is formed, the spout of air intlet pipe 2 is connected with convergent-divergent enlarging 5, gas inlet pipe 1 is installed in 2 li of air intlet pipes, with gas inlet pipe 1 concentric shafts, igniting air gun 6 and high-energy firing gun 7 are installed in the central tube 8 of gas pipe 1, spout place at gas pipe 1 and air hose 2,8 axial coal gas blades 3 evenly are installed between gas pipe 1 and central tube 8,10 axial air blades 4 evenly are installed between gas pipe 1 and air hose 2, the established angle of coal gas blade 3 is 60 degree, the established angle of air blades 4 is 60 degree, and the expansion angle of described convergent-divergent enlarging 5 is 60 degree.
During use, on the front-back wall of boiler furnace, arrange burner one to one, adopt front-back wall opposed firing technology, gas exit speed is 35m/s, air outlet slit speed is 50m/s, reach the purpose of the overheavy firing and the retention flame by the rotation of jet, realize safety, economy and the efficient burning of blast furnace gas and low-heat value gas.The burner outlet axial velocity profile that obtains is in burner outlet axis symmetry substantially, radially roughly is being " M " shape.In a segment distance of distance burner outlet, the axial velocity in flow field is a negative value near the axis, promptly has tangible recirculating zone, and the high velocity of rotating jet is constantly outwards expansion then, and the burner outlet tangential velocity radial distribution that obtains all roughly is " N " shape.The absolute value of tangential velocity constantly reduces along jet direction on each cross section, and near diffusion outlet of tangential velocity field is obvious.
Suitable recirculating zone shape, be of a size of catching fire of fuel gas stream stable thermal source is provided, this is that burner has the important assurance than the intense steady combusting ability, the recirculating zone extended corner of this burner is 30 degree～60 degree, and recirculating zone width and length are preferably arranged, this helps entrainmenting the high temperature reflux flue gas, to catch fire and smooth combustion be very favourable.
The jet boundary that this burner design obtains is outwards expansion obviously, and when outlet is closer, the jet extended corner is bigger, and when outlet is far away, the jet extended corner gathers way and slows down, and the jet extended corner is 50 degree～80 degree.
Claims (5)
1. the burner of pure burning blast-furnace gas or low-heat value gas, it is characterized in that, by gas pipe (1), air hose (2), coal gas blade (3), air blades (4), convergent-divergent enlarging (5), igniting air gun (6), high-energy firing gun (7) is formed, the spout of air intlet pipe (2) is connected with convergent-divergent enlarging (5), gas inlet pipe (1) is located at air intlet pipe (2) lining, with gas inlet pipe (1) concentric shafts, igniting air gun (6) and high-energy firing gun (7) are located in the central tube (8) of gas pipe (1), spout place at gas pipe (1) and air hose (2), between gas pipe (1) and central tube (8), evenly be provided with axial or tangential coal gas blade (3), between gas pipe (1) and air hose (2), evenly be provided with axially or tangential air blade (4).
2. the burner of a kind of pure burning blast-furnace gas according to claim 1 or low-heat value gas is characterized in that, described coal gas blade (3) is the 8-25 sheet, and the established angle of coal gas blade (3) is 45 degree～70 degree.
3. the burner of a kind of pure burning blast-furnace gas according to claim 1 or low-heat value gas is characterized in that, described air blades (4) is the 10-30 sheet, and the established angle of air blades (4) is 45 degree～70 degree.
4. the burner of a kind of pure burning blast-furnace gas according to claim 1 or low-heat value gas is characterized in that, the expansion angle of described convergent-divergent enlarging (5) is 10 degree～80 degree.
5. the combustion method of the burner of a kind of pure burning blast-furnace gas according to claim 1 or low-heat value gas, it is characterized in that, on the front-back wall of boiler furnace, arrange burner one to one, adopt front-back wall opposed firing technology, gas exit speed is 15～40m/s, and air outlet slit speed is 20～60m/s.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100330932A CN101220954A (en) | 2008-01-25 | 2008-01-25 | Combustor and combustion method for pure burning blast furnace gas or low-calorific value gas |
| PCT/CN2008/001056 WO2009094817A1 (en) | 2008-01-25 | 2008-05-30 | A burner only for burning blast furnace gas or low calorific gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100330932A CN101220954A (en) | 2008-01-25 | 2008-01-25 | Combustor and combustion method for pure burning blast furnace gas or low-calorific value gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101220954A true CN101220954A (en) | 2008-07-16 |
Family
ID=39630949
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008100330932A Pending CN101220954A (en) | 2008-01-25 | 2008-01-25 | Combustor and combustion method for pure burning blast furnace gas or low-calorific value gas |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN101220954A (en) |
| WO (1) | WO2009094817A1 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101832556A (en) * | 2010-06-03 | 2010-09-15 | 蓝星化工有限责任公司 | Combustor by utilizing multiple types of mixed gases as fuels |
| CN103486591A (en) * | 2013-09-04 | 2014-01-01 | 北京华清燃气轮机与煤气化联合循环工程技术有限公司 | Tempering-proof nozzle connecting section assembly of combustor of combustion gas turbine |
| CN105042593A (en) * | 2015-08-27 | 2015-11-11 | 武汉奥杰科技股份有限公司 | Gas combustion system |
| CN107763621A (en) * | 2017-11-22 | 2018-03-06 | 江汉大学 | A kind of mixed gas ignition bleeding device |
| CN112775424A (en) * | 2020-12-11 | 2021-05-11 | 河钢股份有限公司承德分公司 | Tundish nozzle baking system |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5913822A (en) * | 1982-07-14 | 1984-01-24 | Mitsui Eng & Shipbuild Co Ltd | Combustion of low calorie gas and burner therefor |
| JPS60129517A (en) * | 1983-12-16 | 1985-07-10 | Hitachi Zosen Corp | Gas burner |
| CN1086788C (en) * | 1997-04-15 | 2002-06-26 | 首钢总公司 | High temperature high pressure electric power station boiler fully burning blast-furnace gas |
| CN2338618Y (en) * | 1998-08-09 | 1999-09-15 | 重庆钢铁设计研究院 | Blast furnace gas burner nozzle |
| CN2390101Y (en) * | 1999-07-06 | 2000-08-02 | 冶金工业部鞍山冶金设计研究院 | Short flame burner for combustion of blast furnace gas |
| CN2544188Y (en) * | 2002-08-23 | 2003-04-09 | 郭玉伟 | Low heat value heat gas burner for gas filling boiler of oil field and the like |
-
2008
- 2008-01-25 CN CNA2008100330932A patent/CN101220954A/en active Pending
- 2008-05-30 WO PCT/CN2008/001056 patent/WO2009094817A1/en active Application Filing
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101832556A (en) * | 2010-06-03 | 2010-09-15 | 蓝星化工有限责任公司 | Combustor by utilizing multiple types of mixed gases as fuels |
| CN103486591A (en) * | 2013-09-04 | 2014-01-01 | 北京华清燃气轮机与煤气化联合循环工程技术有限公司 | Tempering-proof nozzle connecting section assembly of combustor of combustion gas turbine |
| CN105042593A (en) * | 2015-08-27 | 2015-11-11 | 武汉奥杰科技股份有限公司 | Gas combustion system |
| CN107763621A (en) * | 2017-11-22 | 2018-03-06 | 江汉大学 | A kind of mixed gas ignition bleeding device |
| CN107763621B (en) * | 2017-11-22 | 2023-08-15 | 江汉大学 | Mixed gas ignition diffusing device |
| CN112775424A (en) * | 2020-12-11 | 2021-05-11 | 河钢股份有限公司承德分公司 | Tundish nozzle baking system |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2009094817A1 (en) | 2009-08-06 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101644431B (en) | Self-stabilizing three-stage air-distribution low-NOx pulverized coal burner | |
| CN103277795A (en) | Gas burner capable of adjusting gas to be self-recycling | |
| CN105737203B (en) | A kind of cyclone and use its premix burner | |
| CN203099814U (en) | a pulverized coal burner | |
| CN106051759B (en) | Multi-stage separation central backflow formula axial rotational flow burner | |
| CN102788367A (en) | Mild combustor of gas turbine and implement method | |
| CN205842635U (en) | A kind of combustion system reducing Opposite Firing Boiler nitrogen oxides | |
| CN114484438A (en) | Dual-purpose burner device for coal and ammonia | |
| CN202101276U (en) | Mild combustion chamber of gas turbine | |
| CN101220954A (en) | Combustor and combustion method for pure burning blast furnace gas or low-calorific value gas | |
| CN105465780A (en) | Ultralow NOx pulverized coal burner | |
| CN101629718A (en) | Low-nitrogen-oxide multi-tube axial eddy pulverized-coal burner | |
| CN201526966U (en) | Special burner used for circular internal combustion type blast-furnace gas power generation boiler and provided with cone fluidic device | |
| CN108759084A (en) | A kind of energy-saving hot air stove | |
| CN115095855B (en) | Difficult-coal-powder two-stage reverse-spraying opposite-impact cyclone burner and use method thereof | |
| TW200928234A (en) | Burner pilot with virtual spinner | |
| CN215174993U (en) | Air quantity and rotational flow double-regulation burner | |
| CN108518673A (en) | Vortex spraying type burner | |
| CN205579544U (en) | Discharge pulverized coal combustion system a little | |
| CN208764919U (en) | Compound burner | |
| CN112696664A (en) | Smoke generator and efficient smoke recirculation system | |
| CN109539247B (en) | Coal gasification low-nitrogen combustor system for thermal power boiler | |
| CN217482994U (en) | An energy-saving hot blast stove burner | |
| CN218237459U (en) | Ultralow nitrogen gas burner | |
| CN202024323U (en) | Powder fuel combustor |
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: 20080716 |