CN106642082A - Small-sized cyclone-melting pulverized coal furnace - Google Patents
Small-sized cyclone-melting pulverized coal furnace Download PDFInfo
- Publication number
- CN106642082A CN106642082A CN201611121331.6A CN201611121331A CN106642082A CN 106642082 A CN106642082 A CN 106642082A CN 201611121331 A CN201611121331 A CN 201611121331A CN 106642082 A CN106642082 A CN 106642082A
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- Prior art keywords
- flue gas
- air
- vortex
- melting
- heat exchange
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Classifications
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- 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
- F23C3/00—Combustion apparatus characterised by the shape of the combustion chamber
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- 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
- F23C5/00—Disposition of burners with respect to the combustion chamber or to one another; Mounting of burners in combustion apparatus
- F23C5/08—Disposition of burners
- F23C5/32—Disposition of burners to obtain rotating flames, i.e. flames moving helically or spirally
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- 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
-
- 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
- F23C7/02—Disposition of air supply not passing through burner
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- 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 small-sized cyclone-melting pulverized coal furnace, belonging to the field of pulverized coal combustion equipment. The small-sized cyclone-melting pulverized coal furnace comprises a blade type cyclone combustor, a vortex-melting combustion chamber, a high-temperature flue gas outlet pipe, a burn-out chamber and a heat exchange hearth, wherein the blade type cyclone combustor, as a mixed inlet of primary air and pulverized coal, comprises a shell and swirl blades and is connected with the top end of the vortex-melting combustion chamber; a tangential down-sloping high-temperature air inlet (with an adjustable inclination angle) is formed in each of the left and right sides of the upper part of the vortex-melting combustion chamber, and a slag outlet is formed in the lower part of the vortex-melting combustion chamber; and the high-temperature flue gas outlet pipe is led out from a middle position of the top of the vortex-melting combustion chamber, two tangential air inlets are formed in a horizontal section of the high-temperature flue gas outlet pipe, the end part of the high-temperature flue gas outlet pipe is finally connected with the burn-out chamber in a certain expanding angle, the heat exchange hearth is arranged at the upper part of the burn-out chamber, heated surfaces are distributed in the heat exchange hearth, and the heat exchange of high-temperature flue gas is realized in the heat exchange hearth. According to the small-sized cyclone-melting pulverized coal furnace, the problems of poor coal type adaptability, low hearth temperature, instability in combustion and high fly ash carbon content of current popular small pulverized coal furnaces are improved.
Description
Technical field
The present invention relates to coal-fired industry coal-powder boiler, specially small cyclones melting coal-powder boiler.
Background technology
The existing Industrial Boiler of China more than 50 ten thousand, wherein coal-burning boiler account for 85%, and at present middle and small burn coal boiler is general
Mode is fired all over using layer, in combustion Jing often there are the losses such as leakage coal, flying dust, smoke evacuation, thus operational efficiency is very low.Meanwhile,
Industry coal-boiler is the second largest coal-smoke pollution source in addition to station boiler, seriously polluted, it is difficult to focus on.With environment
Problem becomes increasingly conspicuous, the also more and more higher of the requirement in terms of the environmental protection such as relevant government department reduces discharging to industry boiler energy-conservation, in view of
China's richness coal, the resources characteristic of oil-poor, few gas is completely unrealistic into fuel-oil or fuel-gas boiler by boiler improvement.Thus, due to
Efficiently, energy-conservation, the advantage of reduction of discharging, the development of small-sized pulverized-coal fired boiler just seems necessary to little coal-powder boiler.At present, by learning moral
The successful experience of the little pulverized-coal fired boiler of Guo Deng developed countries, China Coal Research Institute has been developed that the height for possessing independent intellectual property right
Effect pulverized-coal fired boiler, and promoted on Shanxi, Liaoning and other places, effect is preferable.
But the little pulverized-coal fired boiler promoted at present there is also some problems.First, little pulverized-coal fired boiler require to use high volatile,
The high-quality bituminous coal of the low grey low water of high heating value, high ash melting point, weak caking property, low-sulfur, i.e., can only burn top quality III class bituminous coal, to coal
The requirement of matter is higher；Simultaneously as furnace water cooling degree is larger, cause fire box temperature relatively low, burn more unstable；It is additionally, since
Burner hearth is less, and flame travel falls short of, without enough tail-off times, cause the CO amounts of remaining in unburned carbon in flue dust and flue gas compared with
Height, so as to reduce the boiler efficiency of little pulverized-coal fired boiler.
Therefore, in order to promote the use of little coal-powder boiler, using its technological merit, it is necessary to by some structure changes and operation side
The change of formula is overcoming above-mentioned shortcoming.
The content of the invention
The purpose of the present invention is to overcome mesh by burning with the separation on heat exchange structure and the change of Boiler Operation
The coal quality requirements that front little pulverized-coal fired boiler is present are high, combustion instability, the problems such as unburned carbon in flue dust is high, while further attempting to reduce
The discharge of NOx so as to more environmentally-friendly reliability.
The technical solution used in the present invention is：Small cyclones melting coal-powder boiler includes blade type turbulent burner, and whirlwind melts
Melt combustion chamber, high-temperature flue gas fairlead, secondary furnace and heat exchange burner hearth.During operation, First air carries coal dust and is fired by blade type eddy flow
Burner is fed by whirlwind melt-combustion ceiling portion spiral；The whirlwind melt-combustion room top left and right sides is provided with tangential high temperature air
Entrance, high temperature air, into combustor ignition coal dust, forms high temperature fused state equivalent to tangential Secondary Air；Combustion chamber bottom
Slag notch is provided with, thus slag discharges under wall flow.High-temperature flue gas fairlead is drawn by top of combustion chamber middle position, coal
The high-temperature flue gas Jing fairleads that powder burning is produced import secondary furnace, eventually enter into heat exchange burner hearth, wherein fairlead horizontal segment arrangement
There is tangential air port, thus appropriate flue gas and air mixture spray into, on the one hand for ensureing uncombusted in whirlwind melt-combustion room
Volatile matter and coal dust it is completely burned off, on the other hand equivalent to flue gas recirculation, it is also possible to reduce the generation of NOx.
It is further characterized by：Using the combination of blade type turbulent burner and whirlwind combustion chamber, greatly increase
Strong mixability and the time of staying of coal dust of coal dust and air, meanwhile, high temperature air entrance is diagonally downward and adjustable angle
（Scope is 10 ° ~ 80 °）, reduce coal dust and have just enter into the ratio that combustion chamber is just escaped from high-temperature flue gas fairlead, while entering one
Step strengthens disturbance, burns more thorough.At the same time, in order to reduce the generation of NOx, the First air and high temperature for carrying coal dust is empty
The excess air coefficient that gas Secondary Air is added together is maintained between 0.7-0.9, imperfect combustion to draw in high temperature air into branch
The horizontal segment of outlet pipe mixes further after-flame with the air entered by horizontal tangential air port.
Small cyclones melt coal-powder boiler high temperature air and coal dust mixed combustion, form slag tap, can reduce in flue gas
Fly ash content, is conducive to environmental protection.
Description of the drawings：
Fig. 1 is the schematic diagram that a kind of small cyclones of the invention melt coal-powder boiler;
Reference：1st, blade type turbulent burner；2nd, swirl vane；3rd, whirlwind melts combustion chamber；4th, left high temperature air entrance；
5th, right high temperature air entrance；6th, slag notch；7th, high-temperature flue gas fairlead；8th, the tangential air intake vent of first level flue；9th, the second water
The tangential air intake vent of flat flue；10th, secondary furnace；11st, exchange heat burner hearth
Specific embodiment：
With reference to Fig. 1, small cyclones melt coal-powder boiler mainly by blade type turbulent burner 1, whirlwind melt-combustion room 3, high temperature cigarette
Gas fairlead 7, secondary furnace 10, heat exchange burner hearth 11 is constituted.Blade type turbulent burner 1 is connected with the top of melt-combustion room 3, while
The top middle position of combustion chamber 3 is connected with high-temperature flue gas fairlead 7, the bottom of combustion chamber 3 be slag notch 6, high-temperature flue gas fairlead 7
Mono- section of horizontal segment of Jing enters secondary furnace 10 after drawing from the top of combustion chamber 3, eventually enters into heat exchange burner hearth 11.During plant running, one
Secondary wind carries coal dust Jing blade types turbulent burner 1 and enters melt-combustion room 3, meanwhile, high temperature air（Secondary Air）By combustion chamber
Two tangential high-temperature flue gas entries 4,5 of upper end arrangement are entered, and ignite coal dust, form high-temperature fusion burning.Ensure one during operation
Secondary wind and high temperature air（Secondary Air）Excess air factor altogether reduces the generation of NOx in the range of 0.7-0.9.Burning
Afterwards liquid lime-ash is flowed down along combustion chamber wall surface, and Jing slag notches 6 are discharged, and the high-temperature flue gas for producing that burn are by high-temperature flue gas fairlead 7
Secondary furnace 10 is introduced, the abundant afterburnt of combustible in flue gas is eventually entered into heat exchange burner hearth 10 in secondary furnace 10 and is exchanged heat,
Therebetween, the tangential air intake vent 8,9 of the horizontal segment of high-temperature flue gas fairlead 7 arrangement has appropriate flue gas and air mixture is sprayed into, from
And so that due to combustion chamber excess air coefficient, less than 1, unburnt combustible is further in secondary furnace 10 in high-temperature flue gas
After-flame, and finally fully enter heat exchange burner hearth 11 exchanged heat.
Claims (4)
1. a kind of small cyclones melt coal-powder boiler, it is characterised in that：By blade type turbulent burner（1）, vortex melt-combustion room
（3）, high-temperature flue gas fairlead（7）, secondary furnace（10）And heat exchange burner hearth（11）Composition, its lobular turbulent burner（1）In
Swirl vane is installed（2）, and with vortex melt-combustion room（3）Top is connected, and First air carries the rotation of Pulverized Coal Jing blade types
Stream burner（1）Into vortex melt-combustion room（3）, vortex melt-combustion room（3）Top is cylinder, and bottom is taper, whirlpool
Rotation melt-combustion room（3）Top the right and left respectively arranges that tangential tilt is downward（Tilt adjustable section）High temperature air entrance
（4）、（5）, vortex melt-combustion room（3）Bottom is slag notch（6）, high-temperature flue gas fairlead（7）By vortex melt-combustion room（3）
Top middle position is drawn, and horizontal segment is disposed with two tangential air intake vents（8）、（9）, terminal level end Jing after necessarily expanding angle with
Secondary furnace（10）It is connected, secondary furnace（10）Top is heat exchange burner hearth（11）, exchange heat burner hearth（11）Be disposed with enough heat-transfer surfaces come with
High-temperature flue gas carry out heat exchange.
2. according to claim 1, in order to enhance coal dust in vortex melt-combustion room（3）Mixing intensity and stop when
Between, First air and coal dust are by blade type turbulent burner（1）Feed.
3. according to claim 1, Secondary Air（High temperature air）By vortex melt-combustion room（3）The tangential tilt on top is downward
High temperature air entrance（4）、（5）Into coal dust is sufficiently mixed burning with high temperature air, and temperature is higher than coal ash fusion temperature, strong to be vortexed
And high temperature considerably reduces fly ash content, melting ash is flowed down along combustion chamber wall surface, by lower tapping hole（6）Into water-cooled slag
Bucket.
4. according to claim 1, described in 2,3, by blade type turbulent burner（1）With tangential high temperature air entrance（4）、（5）Enter
Enter total excess air factor of combustion chamber between 0.7 ~ 0.9, relatively low excess air factor reduces NOx in combustion process
Formation；Meanwhile, two tangential air intake vents of high-temperature flue gas fairlead horizontal segment（8）、（9）It is passed through the mixture of flue gas and air
（Cigarette sky is than adjustable）.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611121331.6A CN106642082B (en) | 2016-12-08 | 2016-12-08 | A kind of small cyclones melting coal-powder boiler |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611121331.6A CN106642082B (en) | 2016-12-08 | 2016-12-08 | A kind of small cyclones melting coal-powder boiler |
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| Publication Number | Publication Date |
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| CN106642082A true CN106642082A (en) | 2017-05-10 |
| CN106642082B CN106642082B (en) | 2019-04-09 |
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| CN201611121331.6A Active CN106642082B (en) | 2016-12-08 | 2016-12-08 | A kind of small cyclones melting coal-powder boiler |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108592634A (en) * | 2018-04-10 | 2018-09-28 | 华电电力科学研究院有限公司 | A kind of melting of solid sulfur ash cyclone furnace and fume afterheat generating integrated system and method |
| CN108931054A (en) * | 2018-06-04 | 2018-12-04 | 河南龙成煤高效技术应用有限公司 | A kind of hot-blast stove and the method for controlling its burning |
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| CN101509659A (en) * | 2009-03-11 | 2009-08-19 | 深圳东方锅炉控制有限公司 | Pulverized coal burner |
| CN101900322A (en) * | 2010-04-01 | 2010-12-01 | 广东迪奥技术工程有限公司 | Dual-cylinder dual-return stroke staged combustion device |
| CN202660537U (en) * | 2012-06-28 | 2013-01-09 | 广东石油化工学院 | Double-cyclone combustion cylinder anthracite duff combustion equipment |
| JP2014137148A (en) * | 2013-01-15 | 2014-07-28 | Miike Iron Works Co Ltd | Cyclone burner |
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| CN105114943A (en) * | 2015-08-26 | 2015-12-02 | 烟台龙源电力技术股份有限公司 | Cyclone furnace and method for improving slag captured rate of cyclone furnace |
| CN105202534A (en) * | 2015-09-22 | 2015-12-30 | 梁万泉 | Fresh air pre-heating fuel dust recovery type gasification furnace |
| CN105627280A (en) * | 2016-03-17 | 2016-06-01 | 西安交通大学 | Lignite semicoke anoxic combustion boiler |
| CN205424911U (en) * | 2015-12-20 | 2016-08-03 | 重庆市界石燃气设备有限公司 | Disconnect -type heat transfer combustor |
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2016
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Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS56146902A (en) * | 1980-04-17 | 1981-11-14 | Ube Ind Ltd | Air heating furnace |
| JPS6358006A (en) * | 1986-08-29 | 1988-03-12 | Mitsubishi Heavy Ind Ltd | Cyclone type combustor |
| JPH062808A (en) * | 1992-06-22 | 1994-01-11 | Mitsubishi Heavy Ind Ltd | Slag tap type coal combustion unit |
| CN101334162A (en) * | 2008-07-24 | 2008-12-31 | 广东工业大学 | Station boiler anthracite powder combustion plant |
| CN101509659A (en) * | 2009-03-11 | 2009-08-19 | 深圳东方锅炉控制有限公司 | Pulverized coal burner |
| CN101900322A (en) * | 2010-04-01 | 2010-12-01 | 广东迪奥技术工程有限公司 | Dual-cylinder dual-return stroke staged combustion device |
| CN202660537U (en) * | 2012-06-28 | 2013-01-09 | 广东石油化工学院 | Double-cyclone combustion cylinder anthracite duff combustion equipment |
| JP2014137148A (en) * | 2013-01-15 | 2014-07-28 | Miike Iron Works Co Ltd | Cyclone burner |
| CN104406161A (en) * | 2014-11-17 | 2015-03-11 | 北京联优创展科技有限公司 | Coal-fired boiler flue gas backflow and supplement burning device |
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| CN105202534A (en) * | 2015-09-22 | 2015-12-30 | 梁万泉 | Fresh air pre-heating fuel dust recovery type gasification furnace |
| CN205424911U (en) * | 2015-12-20 | 2016-08-03 | 重庆市界石燃气设备有限公司 | Disconnect -type heat transfer combustor |
| CN105627280A (en) * | 2016-03-17 | 2016-06-01 | 西安交通大学 | Lignite semicoke anoxic combustion boiler |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108592634A (en) * | 2018-04-10 | 2018-09-28 | 华电电力科学研究院有限公司 | A kind of melting of solid sulfur ash cyclone furnace and fume afterheat generating integrated system and method |
| CN108931054A (en) * | 2018-06-04 | 2018-12-04 | 河南龙成煤高效技术应用有限公司 | A kind of hot-blast stove and the method for controlling its burning |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106642082B (en) | 2019-04-09 |
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