CN2859271Y - Pulverized coal igniting burner capable of ignition with extra little oil with porous media - Google Patents
Pulverized coal igniting burner capable of ignition with extra little oil with porous media Download PDFInfo
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- CN2859271Y CN2859271Y CN 200520117487 CN200520117487U CN2859271Y CN 2859271 Y CN2859271 Y CN 2859271Y CN 200520117487 CN200520117487 CN 200520117487 CN 200520117487 U CN200520117487 U CN 200520117487U CN 2859271 Y CN2859271 Y CN 2859271Y
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- porous media
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- coal
- coil
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Abstract
The utility model discloses a kind of pulverized coal igniting burner capable of ignition with extra little oil with porous media. It is composed of coal main burner equipped with wind cooling circular tube or square tube and igniting burner installed interiorly. The igniting burner includes a oil gun with porous media with nozzle, pulse ignition, air entry, fixing divider, porous media and oil coil and a first coal combustion chamber with coal airflow import. Crust with refractory media is arranged out of the small oil gun with porous media. The director valve is arranged between the oil coil and nozzle. Volume damper is arranged in front of the air entry. Oil pump is in contact with oil filter and oil coil. The small oil gun with porous media has stable combustion, high flame temperature, compact form and heat storage function, and the purpose of burning the coal effectively will be gained because of freedom of fray-out of flame. The utility model is capable of igniting, steady combustion and combustion supporting with high rate of economizing gasoline to save a great deal of cost of fuel.
Description
Technical field
The utility model relates to a kind of coal dust start-up burner of minute quantity oil drop fire, relates in particular to a kind of coal dust start-up burner that utilizes porous media to realize minute quantity oil drop fire.
Background technology
At present, the oil gun of station boiler startup and combustion-supporting employing adopts machinery or steam atomization usually, the oil gun capacity is bigger, is arranged in the overfire air port, and fuel oil enters burner hearth with the drop form after the oil gun atomizing, mixed combustion in stove, the utilization rate of fuel oil is lower, is difficult for firing coal-dust airflow.Also there are some researchers to adopt small oil gun near the coal burner spout, to carry out oily coal multifuel combustion, obtained oil-saving effect preferably, compare the big oil gun that is arranged in the overfiren air port, be arranged near the spout small oil gun and can obtain oil-saving effect about 50%.But this small oil gun still adopts machinery or steam atomization method, belongs to vaporific drop and air mixed combustion mode, and combustion flame temperature is lower, is reddish yellow flame, and temperature is no more than 1200 ℃.Because the interior temperature of stove is lower during the igniting of boiler black furnace, causes oily flame combustion incomplete, instability, therefore the steady combustion effect of this small oil gun is still limited, can't adopt the oil gun of littler oil consumption, causes rate of economizing gasoline limited.
Summary of the invention
The purpose of this utility model provides a kind of coal dust start-up burner that utilizes porous media to realize minute quantity oil drop fire.
It has the coal dust main burner of the pipe that has wind film cooling or square tube and is contained in its inner start-up burner, start-up burner has porous media small oil gun and a pulverized coal combustor, one time pulverized coal combustor is provided with the breeze airflow import, the porous media small oil gun has nozzle, pulse igniter, air intlet, mixing distributor, porous media, oil coil, the porous media small oil gun is provided with fire-resistant medium shell outward, be provided with director valve between oil coil and the nozzle, be provided with volume damper before the air intlet, oil pump and oil strainer, oil coil join.
The porosity of the porous media in the porous media small oil gun is 0.1～0.9, and the aperture is 0.1mm～5mm.Oil coil in the porous media small oil gun is arranged in porous media.
Porous media small oil gun flameholding of the present utility model, the flame temperature height, compact conformation has heat accumulation function, can realize that oily flame does not extinguish, and can reach the purpose of effective firing coal-dust.The utility model can be lighted, surely fire various pulverized-coal fired boilers reliably and be combustion-supporting, and the rate of economizing gasoline height can be saved the great amount of fuel oil expense, has huge economic benefit and social benefit.
For a long time, the atomization method burning is adopted in the burning of oil, is a kind of free flame, because gas conduction performance extreme difference causes near the thermograde of flame big, the high-temperature region is very narrow.Simultaneously, the stability of free flame is also relatively poor, and needs bigger furnace cavity.And the premixed combustion in the porous media is that fuel mix is a kind of both high temperature resistant, the process of burning in the good again porous media material of heat conductivility, premixed gas produces whirlpool, shunts and converges in hole inside, disturbance is violent, and promptly heat is transmitted towards periphery with the form of radiation, convection current and heat conduction, strengthened combustion zone, improved burn rate and made burning fully.Have again simultaneously most of combustion zone the heat backflow preheat unburned mixture body, thereby guaranteed the stability of burning.Porous media in the porous media combustor itself is again a heat-storing material, it can make the temperature levels in the burner maintain higher level, this part accumulation of heat can provide the oil gasification heat, and guarantee when the operating mode acute variation causes fray-out of flame, still flame to be fired again with the accumulation of heat ignition way, thereby solved flame instability, problem such as flame-out.
The porous burner mode can be divided into burning again and carry out (matrix stable) and flame fully in porous media inside in the formation of porous media surface, there is the considerable part combustion reaction outside porous media, to carry out (surface-stable) two kinds, Comparatively speaking, the matrix SCS Stabilized Combustion System has higher burn rate and better combustion stability.
Have " superadiabatic flame " phenomenon in the porous burner device, this phenomenon is meant that in regional area gas temperature can surpass adiabatic flame temperature.Therefore in the porous burner device, the temperature of gas can reach very high numerical value.The characteristic that the flame temperature up to 1500～2000 ℃ of porous media combustor and flame are concentrated is very favorable to the coal dust that ignites.
On the other hand, the porous media in the porous burner device has heat accumulation function again, and its heat accumulation function can be used for pre-heating fuel, thereby improves the stability of catching fire and burning.
Different two strands of breeze airflow sharing proportion in the pulverized coal channel, one less air-flow of share is introduced the primary zone that the porous media small oil gun is housed, after the heating of porous media small oil gun thermal-flame, light, breeze airflow after catching fire enters secondary combustion chamber and lights outside breeze airflow, lights the whole cooker stove at last.The primary zone is arranged in the pulverized coal channel, and the outdoor logical breeze airflow of primary combustion is with cooling primary zone housing.The outdoor cooling air that is furnished with of second-time burning in order to cooling secondary combustion chamber housing, plays the effect of protection housing and anti-coking, and can aftercombustion oxygen amount.
Description of drawings
Accompanying drawing is to utilize porous media to realize the coal dust start-up burner structural representation of minute quantity oil drop fire.
The specific embodiment
As shown in Figure 1, utilize porous media to realize that the coal dust start-up burner of minute quantity oil drop fire has the coal dust main burner 1 of the pipe that has the cooling of wind film or square tube and is contained in its inner start-up burner 2, start-up burner 2 has porous media small oil gun 3 and a pulverized coal combustor 4, one time pulverized coal combustor 4 is provided with breeze airflow import 17, porous media small oil gun 3 has nozzle 8, pulse igniter 11, air intlet 13, mixing distributor 16, porous media 9, oil coil 10, be provided with fire-resistant medium shell 12 outside the porous media small oil gun 3, be provided with director valve 14 between oil coil 10 and the nozzle 8, be provided with volume damper 15 before the air intlet 13, oil pump 6 and oil strainer 7, oil coil 10 joins.
The porosity of the porous media 9 in the porous media small oil gun 3 is 0.1～0.9, and the aperture is 0.1mm～5mm.Oil coil 10 in the porous media small oil gun 3 is arranged in porous media 9.
The operation principle of porous media small oil gun is: according to the characteristic of multi-hole medium combustion, utilize the heat storage capacity of porous media, with the oily preheating in the oil coil, fuel oil and AIR MIXTURES be the high-temperature stable burning in porous media, flame rigidity is strong, be transparent flame, flame temperature can reach 1500～2000 ℃.
Utilize porous media to realize that the course of work of the coal dust start-up burner of minute quantity oil drop fire is: to open director valve 14, liquid oils enters nozzle 8 with vaporific ejection by oil strainer 7 through oil coil 10 by oil pump 6 pressurizations, start volume damper 15 simultaneously, utilize 11 fuel sprays of pulse igniter, mist of oil takes fire and enters porous media 9 with air-flow, heating porous media 9, preheating oil coil 10 after porous media 9 is heated, fuel oil after the preheating is sprayed by nozzle, mix in mixing distributor 16 with air, its catch fire because of fuel-firing preheating more easy, oil enter porous media 9 further overheavy firings then behind the fire burns, burning forms thermal-flame, and thermal-flame enters pulverized coal combustor 4 immediately one time, ignites to enter the breeze airflow of a pulverized coal combustor, breeze airflow catches fire and laggardly goes into main burner and light the secondary breeze airflow, main burner is furnished with air flow channel outward, can cool off the main burner shell, prevents main burner scaling loss and wall coking.After catching fire, the secondary breeze airflow sprays into the burner hearth whole boiler that ignites.
Claims (3)
1. coal dust start-up burner that utilizes porous media to realize minute quantity oil drop fire, it is characterized in that it has the coal dust main burner (1) of the pipe that has wind film cooling or square tube and is contained in its inner start-up burner (2), start-up burner (2) has a porous media small oil gun (3) and a pulverized coal combustor (4), a pulverized coal combustor (4) is provided with breeze airflow import (17), porous media small oil gun (3) has nozzle (8), pulse igniter (11), air intlet (13), mixing distributor (16), porous media (9), oil coil (10), the outer fire-resistant medium shell (12) that is provided with of porous media small oil gun (3), be provided with director valve (14) between oil coil (10) and the nozzle (8), the preceding volume damper (15) that is provided with of air intlet (13), oil pump (6) and oil strainer (7), oil coil (10) joins.
2. according to the said a kind of coal dust start-up burner that utilizes porous media to realize minute quantity oil drop fire of claim 1, it is characterized in that the porosity of the porous media (9) in the porous media small oil gun (3) is 0.1 ~ 0.9, the aperture is 0.1mm～5mm.
3. according to the said a kind of coal dust start-up burner that utilizes porous media to realize minute quantity oil drop fire of claim 1, it is characterized in that the oil coil (10) in the porous media small oil gun (3) is arranged in porous media (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520117487 CN2859271Y (en) | 2005-12-23 | 2005-12-23 | Pulverized coal igniting burner capable of ignition with extra little oil with porous media |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520117487 CN2859271Y (en) | 2005-12-23 | 2005-12-23 | Pulverized coal igniting burner capable of ignition with extra little oil with porous media |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2859271Y true CN2859271Y (en) | 2007-01-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520117487 Expired - Lifetime CN2859271Y (en) | 2005-12-23 | 2005-12-23 | Pulverized coal igniting burner capable of ignition with extra little oil with porous media |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2859271Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100389286C (en) * | 2005-12-23 | 2008-05-21 | 浙江大学 | Coal ignition burner using porous medium for ignition with small oil |
-
2005
- 2005-12-23 CN CN 200520117487 patent/CN2859271Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100389286C (en) * | 2005-12-23 | 2008-05-21 | 浙江大学 | Coal ignition burner using porous medium for ignition with small oil |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Effective date of abandoning: 20080521 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |