CN202613426U - Reversed powder-injecting burner - Google Patents
Reversed powder-injecting burner Download PDFInfo
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- CN202613426U CN202613426U CN 201220243042 CN201220243042U CN202613426U CN 202613426 U CN202613426 U CN 202613426U CN 201220243042 CN201220243042 CN 201220243042 CN 201220243042 U CN201220243042 U CN 201220243042U CN 202613426 U CN202613426 U CN 202613426U
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- rotary supply
- coal dust
- heater
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Abstract
The utility model discloses a coal dust burner for injecting powder reversely. The coal dust burner comprises a high-temperature-resistant furnace body with a hearth. A primary powder supply air inlet is arranged at the position of the center of the top of the high-temperature-resistant furnace body, a secondary rotating air supply opening is arranged on a bottom wall of the hearth, a third-time rotating air supply opening is arranged on the middle lower portion of the a lateral part of the hearth, a fire outlet is arranged on the upper portion of the lateral part of the hearth, a fourth-time rotating air supply opening is arranged at the position of the same height on one side of the lateral part of the hearth corresponding to the fire outlet, a fifth-time rotating air supply opening is arranged at the position of the periphery of the fire outlet. The secondary rotating air supply opening, the third-time rotating air supply opening, the fourth-time rotating air supply opening and the fifth-time rotating air supply opening are communicated with an air blower through air ducts. The coal dust burner has the advantages that retention time of coal dust in a high-temperature region in a furnace is greatly prolonged, oxidation-reduction reaction time of coal dust with different qualities can be met, complete combustion is guaranteed under low furnace temperature, and the requirements of energy saving and environment protection are met.
Description
Technical field
The utility model relates to a kind of coal dust firing machine, relates in particular to a kind of reverse combustor that dusts.
Background technology
In world petroleum resource day by day nervous today, fuel cost is increasingly high.Compare with oil firing, burn coal and not only can significantly reduce fuel cost, simultaneously, because the coal reserves of China is abundant, therefore burning coal can reduce the dependence to petroleum resources, meets the energy policy of China.So coal burner has bigger application market and prospect in China.
When coal dust was heated to about 300 ℃, the fugitive constituent in the coal began to separate out and burn, and after fugitive constituent was discharged, the after-flame of residue carbon component just needed very high temperature and long redox reaction time.Because the difference of the quality of coal dust is very big, for the lower coal dust of bigger pulverized coal particle and fugitive constituent, the time of staying of prolongation coal dust high-temperature region in stove is just most important.
Existing coal burner as shown in Figure 2, the direct of travel of coal dust in stove is identical with the emission direction of flame, and this combustion system is combustion system forward.Because the wind speed in the stove is higher, all is tens meter per seconds usually, most pulverized coal particles time of staying of high-temperature region in stove is approximately 0. 1 seconds.Therefore, existing coal burner all has strict requirement to the fugitive constituent and the fineness of coal dust.Not only the adjustable range of flame is narrower, and cutoff easily, and combustion instability, exhaust emissions also are difficult to up to standard, also common unburnt coal dust in the dust-removal cloth-bag, thus caused per unit area yield coal consumption efficiency of combustion big, coal dust lower.
In addition, because of receiving the volume restrictions of stove tube, the temperature in the stove must be very high, and this has increased the weight of the generation of slag and the discharging of nitrogen oxide again.In addition, because the control of existing coal burner is simple relatively, the temperature departure is bigger, and burning quality is difficult to guarantee that therefore, in a lot of major projects, existing coal burner is disabled.
Therefore, be badly in need of in high-end devices market that a kind of flame adjustable range is wide, burning fully and stable, do not choose coal, the high-performance coal dust firing machine of not only energy-conservation but also environmental protection.
Summary of the invention
The utility model aims to provide a kind of reverse combustor that dusts; With solve existing coal dust firing machine to coal dust have relatively high expectations, burning quality is lower, the flame adjustable range is narrow, be prone to produce cinder and the short problem of refractory life; Thereby realize the target that combustor is not chosen coal, satisfy the demand of various production occasions.
The purpose of the utility model realizes through following technical proposals:
A kind of reverse combustor that dusts; Comprise that one has the high temperature resistant body of heater of burner hearth; The center of top position of said high temperature resistant body of heater is provided with the pulverizer air inlet one time, and the bottom of said body of heater is provided with ring-type secondary rotary supply outlet, and the middle part of said body of heater is provided with rotary supply outlet three times; The top of said body of heater sidepiece is provided with crater; Said body of heater sidepiece is provided with rotary supply outlet four times with the corresponding height of said crater place, and around locating to be provided with rotary supply outlet five times around the said crater, said ring-type secondary rotary supply outlet, three rotary supply outlets, four rotary supply outlets, five rotary supply outlets are connected with air blast through the air channel.
Preferably, the differing heights place of said burner hearth sidepiece is provided with at least one temperature thermocouple.
Preferably; Said ring-type secondary rotary supply outlet has one group of ring-type rotary supply outlet at least; On the center line that is centered close to said bottom of furnace body of said ring-type secondary rotary supply outlet, the air-out that said ring-type secondary rotary supply outlet is arranged to satisfy said ring-type secondary rotary supply outlet forms the shape of the rotation wind that upwards flows around burner hearth.
Preferably, said four rotary supply outlets are arranged to satisfy the shape of air-out direction with the direction that fires of said crater.
The beneficial effect of the utility model: the described combustor of the utility model has adopted reverse the dust combustion system different with existing coal burner; The trend that sprays into gas in direction and the stove that is coal dust is opposite; Improved the time of staying of coal dust high-temperature region in stove greatly; Can under the prerequisite of not choosing coal and broad flame adjustable range, improve burning quality, realize the target of not only energy-conservation but also environmental protection.
Description of drawings
Fig. 1 is the structural representation of the said reverse combustor that dusts of the utility model;
Fig. 2 is the structural representation of existing coal dust firing machine.
Among the figure:
1, powder feeding air-supply inlet; 2, ring-type secondary rotary supply outlet; 3, three rotary supply outlets; 4, four rotary supply outlets; 5, high temperature resistant body of heater; 6, air blast; 7, crater; 8, five oxygenating air outlets; 9, temperature thermocouple; 10, air channel.
The specific embodiment
Following with reference to accompanying drawing 1-2, in conjunction with concrete embodiment the utility model is further described.
The described a kind of reverse combustor that dusts of the utility model; Comprise that one has the high temperature resistant body of heater 5 of burner hearth; The center of top position of said high temperature resistant body of heater 5 is provided with pulverizer air inlet 1 one time; The bottom of said body of heater 5 is provided with ring-type secondary rotary supply outlet 2; The middle part of said body of heater 5 sidepieces is provided with rotary supply outlet 3 three times, and the top of said body of heater 5 is provided with crater 7, and said body of heater 5 is being provided with rotary supply outlet 4 four times with said crater 7 corresponding co-altitude places; Around locating to be provided with rotary supply outlet 8 five times around the said crater, said secondary rotary supply outlet 2, three rotary supply outlets 3, four rotary supply outlets 4, five air outlets 8 are connected with an air blast 6 through air channel 10.In Fig. 1; Said ring-type secondary rotary supply outlet 2 can be arranged on the diapire of body of heater 5; Said three rotary supply outlets 3 are arranged on the position of the general middle part of the sidewall height of said body of heater 5; Said crater 7 is arranged on the top of said body of heater 5 sidewalls, and on the sidewall of these crater 7 position opposite positions rotary supply outlet 4 is set four times.Said burner hearth is formed by said sidewall, diapire.
What preferably, said pulverizer air inlet 1 was arranged to satisfy coal dust sprays into direction with gas flow shape in the opposite direction in the said body of heater.
Preferably, the differing heights place of said burner hearth is provided with at least one temperature thermocouple 9.
Preferably; Said ring-type secondary rotary supply outlet 2 has one group of ring-type rotary supply outlet at least; On the center line that is centered close to said bottom of furnace body of said ring-type secondary rotary supply outlet 2, the air-out that said ring-type secondary rotary supply outlet 2 is arranged to satisfy said ring-type secondary rotary supply outlet 2 forms the shape of the rotation wind that upwards flows around burner hearth.The advantage that is provided with like this is that the air-out of said ring-type secondary rotary supply outlet 2 forms the rotation wind that upwards flows around burner hearth.
Said three rotary supply outlets 3 are arranged to satisfy the shape that air-out direction rises for spiral rotation obliquely, and the tertiary air that said three air outlets 3 are seen off also can be controlled the temperature at burner hearth middle part in the gas rotation comburant oxygen being provided and quickening in the stove.In one embodiment, the shape of said three rotary supply outlets 3 is arranged to the direction in air port and radially having angle of said body of heater, and points to said pulverizer air inlet 1.
Said five air outlets 5 are arranged to satisfy the air-out direction shape identical with the direction that fires of said crater, and five wind that said five air outlets 5 are seen off are used to a large amount of carbon monoxide that spray in the stove provides burning to use oxygen, and are the fire door cooling.
Said four rotary supply outlets 4 are arranged to satisfy the air-out direction shape identical with the direction that fires of said crater.
The operation principle of the said combustor of the utility model is as shown in Figure 1: body of heater adopts vertical or horizontal type structure; A wind of coal dust and powder feeding sprays into from a pulverizer air inlet 1 that is positioned at furnace roof central authorities; The burner hearth center is owing to the heat absorption of coal dust and a wind is lowered the temperature, and coal dust is then by rapid heating and wrap up in the bottom that arrives burner hearth with flame.
Secondary wind is being rotated upwards air-supply from the secondary ring-type rotary supply outlet 2 that is positioned at bottom of furnace body, and upwards blows afloat arriving the coal dust that the bottom takes fire, and coal dust is in the combustion-supporting accelerated combustion down of secondary wind.
In order to control the temperature in the stove, added the tertiary air that rotates through three rotary supply outlets 3 that are positioned at the body of heater middle part, upwards the coal dust of rotation burns near burner hearth with the wind, and the coal dust that the while high-temperature burner hearth comes up to the bottom again provides the high-temperature field of burning indispensability.Because the crater of body of heater is even relatively for what guarantee to jet out flames in a side of body of heater, add four wind of control flame direction and temperature through four rotary supply outlets 4 that are positioned at body of heater crater 7 equal altitudes.
The total amount of one two three four wind should be lower than theoretical oxygen supply value (coefficient of excess air≤1) in the stove; Increased by five times wind again at the crater place through being positioned at around five oxygenating air outlets 8 locating around the crater 7 for this reason; Thereby reach just right result: a large amount of carbon monoxide and a small amount of unburnt coal dust are along with flame is sprayed into boiler or kiln together; And in stove final after-flame, five wind also can be the fire door cooling simultaneously.
From Fig. 1 and above-mentioned operation principle, be not difficult to find out:
1. reverse dusting not only strengthened the stroke of coal dust in stove, also can be the upper of furnace body cooling simultaneously, and the high-temperature gas of body of heater central authorities is moved down fast, also sets up higher temperature field at burner hearth bottom.
2. owing to the reaction of burner hearth updraft, when the downward kinetic energy of coal dust disappeared or arrives the bottom, coal dust had of short duration pause in the bottom of burner hearth.
3. because the shared ratio of secondary wind is little, and the wind speed that burner hearth bottom makes progress is relatively low, so the coal dust up speed of initial stage that moves upward is relatively low.
Above-mentioned three factors have all prolonged the time of staying of coal dust in the high-temperature region, are provided to the after burning of coal dust the comparatively well-to-do redox reaction time, thereby realize cold operation.In order rationally to monitor furnace temperature, can settle a plurality of temperature thermocouples on the middle part, bottom and the top of body of heater, can suitably adjust the proportioning of each time wind according to the temperature of different parts in the stove.Through air distribution and the proportionate relationship that changes each section; Guarantee that each section temperature is controlled at 800-1000 ℃ of (different coal dust quality temperature are different) section operation as far as possible in the stove; Help reducing the formation of cinder and nitrogen oxide, can also prolong the service life of body of heater and kiln interface simultaneously.
In order to guarantee adjusting ratio and the level and smooth control characteristic of flame 1:10, can adopt a plurality of frequency converters to control the powder feeding spiral respectively, supply powder blower fan and each time air distribution.When flame was 10% aperture, the revolution of all motors was all lower.Otherwise flame was transferred at 100% o'clock, and the revolution of all motors is all in high value.Guarantee that complete machine in the large-scale flame adjustment process of 1:10, remains desirable coefficient of excess air; The coal dust of guaranteeing different qualities all can be in stablizes good fired state.
In sum: the described reverse coal dust firing machine that dusts of the utility model is compared with existing coal dust firing machine; Has tangible excellent characteristic; Not only can smooth combustion, can also reduce the coal dust cost and " eat coarse food grain ", also have energy-conserving and environment-protective, long-lived superior quality simultaneously.
The described combustor of the utility model has adopted reverse the dust combustion system different with existing combustor, and promptly the trend that sprays into gas in direction and the stove of coal dust is opposite.By being not difficult to find out among Fig. 1: the stroke of coal dust in stove approximately is two times of existing coal burner.As adopt the relative floor space of vertical structure less; Can suitably strengthen the diameter and the length of body of heater; Therefore coal dust should be existing more than three times of coal-powder boiler in the time of staying of high-temperature region at least; Can obviously improve of the harsh requirement of existing coal burner, can " eat coarse food grain " coal dust fugitive constituent and fineness.And the adjustable range of flame is increased greatly, reach 1:10.Because coal dust has the long redox reaction time in stove, can reduce the furnace temperature operation, therefore can reduce the generation of slag, reduce the trouble of existing coal-powder boiler scarfing cinder, thus the discharging that can also reduce tail gas nitrogen oxide compliance with environmental protection requirements more.If the diameter of stove and length are enough big, under the very low situation of furnace bottom wind speed, also can make to use the face coal (extravagant hope of particle diameter≤1mm) and coal dust inferior (not choosing coal) becomes possibility, reduces the processing and the purchase cost of coal dust significantly.
Because the utility model will have been made detailed description with reference to preferred embodiment, various modification and the replacement therefore the utility model made all should be regarded as not breaking away from the spirit and the claim scope that limit in the utility model claim.
Claims (7)
1. reverse combustor that dusts; Comprise that one has the high temperature resistant body of heater of burner hearth; The center of top position of said high temperature resistant body of heater is provided with the pulverizer air inlet one time, and the bottom of said body of heater is provided with ring-type secondary rotary supply outlet, and the middle and lower part of said body of heater sidepiece is provided with rotary supply outlet three times; The top of said body of heater sidepiece is provided with crater; Said body of heater sidepiece and the corresponding height of said crater place are provided with rotary supply outlet four times, and around locating to be provided with air outlet five times around the said crater, said ring-type secondary rotary supply outlet, three rotary supply outlets, four rotary supply outlets, five air outlets are connected with air blast through the tubular air channel.
2. the reverse combustor that dusts described in claim 1 is characterized by: what said pulverizer air inlet was arranged to satisfy coal dust sprays into direction with gas flow shape in the opposite direction in the said body of heater.
3. the reverse combustor that dusts described in claim 1 or 2; It is characterized in that: said ring-type secondary rotary supply outlet has one group of ring-type rotary supply outlet at least; On the center line that is centered close to said bottom of furnace body of said ring-type secondary rotary supply outlet; The air-out that said ring-type secondary rotary supply outlet is arranged to satisfy said ring-type secondary rotary supply outlet forms the shape of the rotation wind that upwards flows around burner hearth, and the coal dust bottom said ring-type secondary rotation wind will arrive when comburant oxygen is provided is rotating and blowing afloat.
4. the reverse combustor that dusts described in claim 1 or 2; It is characterized in that: said three rotary supply outlets are arranged to satisfy the shape that air-out direction rises for spiral rotation obliquely; The tertiary air that said three air outlets are seen off is also controlled the temperature at burner hearth middle part when comburant oxygen being provided and quickening in the stove gas rotation.
5. the reverse combustor that dusts described in claim 1 or 2; It is characterized in that: said five air outlets are arranged to satisfy the air-out direction shape identical with the direction that fires of said crater; Five wind that said five air outlets are seen off are used to a large amount of carbon monoxide that spray in the stove provides burning to use oxygen, and is the fire door cooling.
6. the reverse combustor that dusts described in claim 1 or 2, it is characterized in that: the differing heights place of said burner hearth sidepiece is provided with at least one temperature thermocouple, by it foundation of control furnace temperature is provided.
7. the reverse combustor that dusts described in claim 6, it is characterized in that: said four rotary supply outlets are arranged to satisfy the air-out direction shape identical with the direction that fires of said crater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220243042 CN202613426U (en) | 2012-05-28 | 2012-05-28 | Reversed powder-injecting burner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220243042 CN202613426U (en) | 2012-05-28 | 2012-05-28 | Reversed powder-injecting burner |
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| Publication Number | Publication Date |
|---|---|
| CN202613426U true CN202613426U (en) | 2012-12-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220243042 Expired - Fee Related CN202613426U (en) | 2012-05-28 | 2012-05-28 | Reversed powder-injecting burner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202613426U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102777894A (en) * | 2012-05-28 | 2012-11-14 | 李延新 | Reverse powder injection combustor |
-
2012
- 2012-05-28 CN CN 201220243042 patent/CN202613426U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102777894A (en) * | 2012-05-28 | 2012-11-14 | 李延新 | Reverse powder injection combustor |
| CN102777894B (en) * | 2012-05-28 | 2015-04-15 | 李延新 | Reverse powder injection combustor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: BEIJING DIGI BURNER TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: LI YANXIN Effective date: 20140428 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 100102 CHAOYANG, BEIJING TO: 100000 CHAOYANG, BEIJING |
|
| TR01 | Transfer of patent right |
Effective date of registration: 20140428 Address after: 100000 Beijing city Chaoyang District Lize Road No. 1 in the office A1605 Patentee after: Beijing tigui Bona Technology Co Ltd Address before: 100102 Beijing city Chaoyang District Wangjing Lize Road No. 1 in Boya International Center A1603 Patentee before: Li Yanxin |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121219 Termination date: 20200528 |