CN204141575U - Be applicable to the coal burner nozzle being with minor air cell's cement decomposing furnace fuel-staged combustion - Google Patents
Be applicable to the coal burner nozzle being with minor air cell's cement decomposing furnace fuel-staged combustion Download PDFInfo
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- CN204141575U CN204141575U CN201420553561.XU CN201420553561U CN204141575U CN 204141575 U CN204141575 U CN 204141575U CN 201420553561 U CN201420553561 U CN 201420553561U CN 204141575 U CN204141575 U CN 204141575U
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Abstract
The utility model relates to a kind of coal burner nozzle being applicable to be with minor air cell's cement decomposing furnace fuel-staged combustion, comprise jet pipe, it is characterized in that, at nozzle exit end central axis place, one conical bluff body is installed, the cone point of conical bluff body is relative with coal powder entrance end, welds the triangle water conservancy diversion gusset of some at the inwall place of jet pipe symmetrically.After the utility model carries out above-mentioned transformation, conical bluff body and triangle water conservancy diversion gusset is increased in jet pipe, the coal dust that original straight line is sprayed produces eddy flow and spreads apart, and the time of staying extended in jet pipe due to bluff body resistance, produce backflow in the tail district of bluff body after ejection, entrainment high-temperature flue gas, burner outlet coal dust is with suitable speed and liquid form ejection, coordinate the airflow field in dore furnace, temperature field, be beneficial to catching fire and Thorough combustion of coal dust, improve combustion position well.The utility model structure is simple, easy to process, is easy to realize.
Description
Technical field
The utility model relates to a kind of coal burner nozzle being applicable to be with minor air cell's cement decomposing furnace fuel-staged combustion, is specially adapted to the band minor air cell cement decomposing furnace of the daily output at the employing fuel-staged combustion of 2000t-10000t.
Background technology
Dore furnace adopts fractional combustion to be that cement industry reduces one of important technology route of discharged nitrous oxides.Grading combustion technology is a denitration technology without the need to operating cost, by the thorough consideration in design, operational meticulous cooperation, can when not affecting Yield and quality, stably keep denitration efficiency, very effective to reduction discharged nitrous oxides total amount, be the effective measures that cement industry reduces nitrogen oxide.
Dore furnace grading combustion technology mainly contains Researched of Air Staging Combustion Burning Pulverized Coal and fuel-staged combustion.Air classification changes air supply mode, two parts are divided to send into burner hearth the air required for burning, control the distribution of furnace air, make coal in stage anoxic of catching fire, namely reducing atmosphere is caused at burner outlet and combustion centre region, thus reducing the growing amount of nitrogen oxide, the combustion zone in upper furnace mixes with burnout degree and burns completely by unburnt fuel.Fuel staging sets up denitration reduction combustion zone, by uniform for a part for former dore furnace coal in this region, its anoxycausis is made to produce the reducing agents such as CO, nitrogen oxide in these reducing agents and kiln exit gas reacts, and reduction of nitrogen oxide is become the free of contamination inert gases such as nitrogen.In addition, in dore furnace, coal dust burns under anoxic conditions, also inhibits the generation of self fuel NO, thus the nitrogen oxide realized in cement production process reduces discharging.
Coal dust burner is the key equipment in cement production enterprise sinter leaching system, the quality of its performance and operation is related to clinker, quality, energy consumption and environmental protection, the series of problems such as length in service life of rotary kiln refractory brick, the excellent coal burner of performance quality brings huge economic benefit by enterprise, therefore the great attention of coal burner extremely cement production enterprise manager and technical staff.
Wan Xinfa devises-with the dry-process cement rotary kiln predecomposition furnace burner nozzle (CN201964402U) of blunt body of spiral.This burner is a kind of burner nozzle with blunt body of spiral, it is characterized by the port of export of jet pipe and is provided with the bluff body that one end is cone structure, and the cone of bluff body point is relative with coal powder entrance end, and the surrounding of bluff body is provided with helical blade.By increasing a bluff body in jet pipe, produce screw after the coal dust of original rectilinear motion is obstructed and spread rapidly at burner internal, be conducive to extending the coal dust time of staying in the burner, increase the contact area of coal dust and oxygen, make burning more fully thoroughly.
Guo Jia etc. devise a kind of burner of decomposition furnace with variable air flow fields (CN202284791U).This utility model provides a kind of by regulating the degree of scatter of coal dust in the dore furnace of different airflow field and the burner of decomposition furnace of mixability.Its technical characteristic comprises and can be moved vertically by female cone and outer cone two and to change the coal wind duct of relative position, regulate the degree of scatter of coal dust in the dore furnace of different airflow field and mixability, improve the burn-off rate of coal dust in dore furnace, the amount of being sparing in the use of coal, reduce hear rate.
Wang Shusen devises a kind of novel dore furnace diffused coal burner (CN203431857U).This burner comprises outer tube and interior pipe, interior pipe central exterior surface is periphery, and install one between outer tube wall and arrange swirl vane, the other end surface of interior pipe is conical, interior pipe is fixedly connected with dore furnace by fixed mount, interior pipe is hollow tube, and it is the cross section on the face of cylinder that the cross section of the middle circle cylinder of interior pipe is greater than interior pipe one end, and by taper seat transition.This novel dore furnace diffused coal burner has smoke abatement and dust control, energy-efficient, structure simple, making and installation feature easily.
The cement decomposing furnace coal burner that above patent relates to mainly is optimized transformation in nozzle structure, port number etc., burner (CN201964402U) complex structure of band blunt body of spiral, the adjustment difficulty of stream field.The fuel-staged combustion that above burner is not aimed at dore furnace designs, and is not therefore suitable for the fuel-staged combustion technology of the dore furnace of band minor air cell.Therefore, the burner special developing the dore furnace fuel-staged combustion of appropriate bands minor air cell is very important.
During band minor air cell cement decomposing furnace employing fuel-staged combustion, position due to fuel staging is in dore furnace bottom pyramidal portion and is advisable, when vertical body of heater installs the simple coal dust jet pipe of the structure the same with upper vortex room herein, after coal dust is sent into dore furnace by wind, very near owing to spraying into positional distance gas approach, the speed that flue gas enters body of heater along dore furnace axis direction is larger, movement locus after coal dust enters dore furnace is subject to the obvious impact of smoke movement, it is excessive that coal dust sprays into speed, airflow field in dore furnace will be upset, affect the conveying of air-flow to material and fuel, and body of heater facing interior wall face can be washed away, affect the life-span of fire resisting material of furnace body, it is too small that coal dust sprays into speed, coal dust decentralization is little, and part coal dust is even in the burning of dore furnace internal face place, and imperfect combustion coal dust also normally cannot move upward in the middle part of body of heater, to the imperfect combustion of fuel be caused, and then affect the resolution ratio of raw material in dore furnace.
Summary of the invention
The purpose of this utility model, for the bad problem of combustion position during above-mentioned existing dore furnace fuel-staged combustion, proposes a kind of for being applicable to be with the coal burner nozzle of minor air cell's cement decomposing furnace fuel-staged combustion.
The technical solution of the utility model is: be applicable to the coal burner nozzle being with minor air cell's cement decomposing furnace fuel-staged combustion, comprise jet pipe, it is characterized in that, at nozzle exit end central axis place, one conical bluff body is installed, the cone point of conical bluff body is relative with coal powder entrance end, welds the triangle water conservancy diversion gusset of some at the inwall place of jet pipe symmetrically.
By such scheme, conical bluff body is connected mutually by support bar and triangle water conservancy diversion gusset.
By such scheme, the diameter of described conical bluff body is the 1/5-1/8 of jet size.
By such scheme, the highest 1/5-1/10 being of a size of nozzle exit diameter in jet size direction of described triangle water conservancy diversion gusset.
By such scheme, the angle of the bus of triangle water conservancy diversion gusset and jet pipe is 5-40 degree, and the quantity of triangle water conservancy diversion gusset is 3-12.
After the utility model carries out above-mentioned transformation, conical bluff body and triangle water conservancy diversion gusset is increased in jet pipe, the coal dust that original straight line is sprayed produces eddy flow and spreads apart, and the time of staying extended in jet pipe due to bluff body resistance, produce backflow in the tail district of bluff body after ejection, entrainment high-temperature flue gas, burner outlet coal dust is with suitable speed and liquid form ejection, coordinate the airflow field in dore furnace, temperature field, be beneficial to catching fire and Thorough combustion of coal dust, improve combustion position well.The utility model structure is simple, easy to process, is easy to realize.
Accompanying drawing explanation
Fig. 1 is vertical section structure schematic diagram of the present utility model;
Fig. 2 is cross section structure schematic diagram of the present utility model;
Fig. 3 is the structural representation of triangle water conservancy diversion gusset of the present utility model;
1-jet pipe in figure; 2-support bar; 3-triangle water conservancy diversion gusset; 4-conical bluff body.
Detailed description of the invention
Below in conjunction with drawings and Examples the utility model be described further and illustrate.
The utility model welds 3-12 triangle water conservancy diversion gusset 3 symmetrically at the inwall place of jet pipe 1, the highest 1/5-1/10 being of a size of nozzle exit diameter in jet size direction of triangle water conservancy diversion gusset, when welding, the bus of triangle water conservancy diversion gusset and jet pipe is 5-40 degree.A conical bluff body 4 is installed at nozzle exit end central axis place, and the diameter of conical bluff body is the 1/5-1/8 of jet size, and its cone point is relative with coal powder entrance end, and conical bluff body is connected mutually by support bar 2 and triangle water conservancy diversion gusset.Coal wind is when spraying coal wind duct, water conservancy diversion gusset makes the mixed airflow of coal dust and air produce eddy flow and spread apart, bluff body is produced simultaneously and impact, circular cone bluff body is strikeed back to be spread apart, extend the coal dust time of staying in the burner, produce backflow in the tail district of bluff body after ejection burner, entrainment high-temperature flue gas, be beneficial to catching fire and Thorough combustion of coal dust, the length of flame can be controlled simultaneously.The utility model structure is simple, is convenient to processing and realizes, and can ensure the stable of combustion flame well.
Claims (5)
1. be applicable to the coal burner nozzle being with minor air cell's cement decomposing furnace fuel-staged combustion, comprise jet pipe, it is characterized in that, at nozzle exit end central axis place, one conical bluff body is installed, the cone point of conical bluff body is relative with coal powder entrance end, welds the triangle water conservancy diversion gusset of some at the inwall place of jet pipe symmetrically.
2. the coal burner nozzle being applicable to band minor air cell cement decomposing furnace fuel-staged combustion according to claim 1, is characterized in that conical bluff body is connected mutually by support bar and triangle water conservancy diversion gusset.
3. the coal burner nozzle being applicable to band minor air cell cement decomposing furnace fuel-staged combustion according to claim 1, is characterized in that the diameter of described conical bluff body is the 1/5-1/8 of jet size.
4. the coal burner nozzle being applicable to band minor air cell cement decomposing furnace fuel-staged combustion according to claim 1, is characterized in that the highest 1/5-1/10 being of a size of nozzle exit diameter in jet size direction of described triangle water conservancy diversion gusset.
5. being applicable to according to claim 1 or 4 is with the coal burner nozzle of minor air cell's cement decomposing furnace fuel-staged combustion, and it is characterized in that the angle of the bus of triangle water conservancy diversion gusset and jet pipe is 5-40 degree, the quantity of triangle water conservancy diversion gusset is 3-12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420553561.XU CN204141575U (en) | 2014-09-25 | 2014-09-25 | Be applicable to the coal burner nozzle being with minor air cell's cement decomposing furnace fuel-staged combustion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420553561.XU CN204141575U (en) | 2014-09-25 | 2014-09-25 | Be applicable to the coal burner nozzle being with minor air cell's cement decomposing furnace fuel-staged combustion |
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| Publication Number | Publication Date |
|---|---|
| CN204141575U true CN204141575U (en) | 2015-02-04 |
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|---|---|---|---|
| CN201420553561.XU Expired - Fee Related CN204141575U (en) | 2014-09-25 | 2014-09-25 | Be applicable to the coal burner nozzle being with minor air cell's cement decomposing furnace fuel-staged combustion |
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| CN (1) | CN204141575U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107407482A (en) * | 2015-03-31 | 2017-11-28 | 三菱日立电力系统株式会社 | burner and boiler |
| CN107420889A (en) * | 2016-05-24 | 2017-12-01 | 斗山重工业株式会社 | The nozzle head of coal burner |
| CN108534185A (en) * | 2018-05-07 | 2018-09-14 | 贵州大学 | A kind of integrated energy-saving type gas-cooker |
| CN109323250A (en) * | 2017-07-31 | 2019-02-12 | 通用电气技术有限公司 | Coal nozzle assembly |
| CN110226067A (en) * | 2017-01-31 | 2019-09-10 | 三菱日立电力系统株式会社 | Burner, the boiler and combustion method for having the burner |
| CN113639265A (en) * | 2021-09-09 | 2021-11-12 | 章丘华明水泥新型建材有限公司 | Pulverized coal spray head structure |
| CN114932019A (en) * | 2022-07-25 | 2022-08-23 | 中国空气动力研究与发展中心低速空气动力研究所 | Method for controlling expansion angle of rectangular jet flow |
| CN114992640A (en) * | 2022-05-23 | 2022-09-02 | 扬州市银焰机械有限公司 | Multi-channel mixed fuel combustor for rotary kiln |
-
2014
- 2014-09-25 CN CN201420553561.XU patent/CN204141575U/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107407482A (en) * | 2015-03-31 | 2017-11-28 | 三菱日立电力系统株式会社 | burner and boiler |
| US10605455B2 (en) | 2015-03-31 | 2020-03-31 | Mitsubishi Hitachi Power Systems, Ltd. | Combustion burner and boiler |
| CN107420889A (en) * | 2016-05-24 | 2017-12-01 | 斗山重工业株式会社 | The nozzle head of coal burner |
| CN110226067A (en) * | 2017-01-31 | 2019-09-10 | 三菱日立电力系统株式会社 | Burner, the boiler and combustion method for having the burner |
| CN109323250A (en) * | 2017-07-31 | 2019-02-12 | 通用电气技术有限公司 | Coal nozzle assembly |
| CN108534185A (en) * | 2018-05-07 | 2018-09-14 | 贵州大学 | A kind of integrated energy-saving type gas-cooker |
| CN113639265A (en) * | 2021-09-09 | 2021-11-12 | 章丘华明水泥新型建材有限公司 | Pulverized coal spray head structure |
| CN113639265B (en) * | 2021-09-09 | 2024-06-04 | 章丘华明水泥新型建材有限公司 | Pulverized coal spray head structure |
| CN114992640A (en) * | 2022-05-23 | 2022-09-02 | 扬州市银焰机械有限公司 | Multi-channel mixed fuel combustor for rotary kiln |
| CN114992640B (en) * | 2022-05-23 | 2023-05-12 | 江西协成锂业有限公司 | Multichannel mixed fuel combustor for rotary kiln |
| CN114932019A (en) * | 2022-07-25 | 2022-08-23 | 中国空气动力研究与发展中心低速空气动力研究所 | Method for controlling expansion angle of rectangular jet flow |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150204 Termination date: 20170925 |
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| CF01 | Termination of patent right due to non-payment of annual fee |