CN203824074U - Hot air furnace with combustor at bottom - Google Patents
Hot air furnace with combustor at bottom Download PDFInfo
- Publication number
- CN203824074U CN203824074U CN201320755323.2U CN201320755323U CN203824074U CN 203824074 U CN203824074 U CN 203824074U CN 201320755323 U CN201320755323 U CN 201320755323U CN 203824074 U CN203824074 U CN 203824074U
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- CN
- China
- Prior art keywords
- wind
- blast stove
- burner
- hot
- flow deflector
- Prior art date
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- Expired - Lifetime
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- 239000000843 powder Substances 0.000 claims abstract description 38
- 238000002485 combustion reaction Methods 0.000 claims abstract description 20
- 239000001301 oxygen Substances 0.000 claims abstract description 9
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 9
- 206010021143 Hypoxia Diseases 0.000 claims description 29
- 208000018875 hypoxemia Diseases 0.000 claims description 29
- 239000011229 interlayer Substances 0.000 claims description 16
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 8
- 230000000694 effects Effects 0.000 claims description 4
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 230000008878 coupling Effects 0.000 claims description 3
- 238000010168 coupling process Methods 0.000 claims description 3
- 238000005859 coupling reaction Methods 0.000 claims description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N Nitric oxide Chemical compound O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 abstract description 21
- 239000003245 coal Substances 0.000 abstract description 8
- 238000001035 drying Methods 0.000 abstract description 4
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 238000005406 washing Methods 0.000 abstract description 4
- 239000000919 ceramic Substances 0.000 abstract description 2
- 239000003337 fertilizer Substances 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 150000001875 compounds Chemical class 0.000 abstract 1
- 239000002817 coal dust Substances 0.000 description 11
- 238000004939 coking Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 239000000446 fuel Substances 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003250 coal slurry Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 238000006722 reduction reaction Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 208000011580 syndromic disease Diseases 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- -1 washing assisant Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
Abstract
The utility model discloses a hot air furnace with a combustor at the bottom. The hot air furnace comprises a hot air furnace body and the combustor, wherein the combustor is arranged at the bottom of the hot air furnace body; the combustor is provided with primary pulverized air, tertiary low-oxygen air and secondary combustion-boosting air arranged in sequence from inside to outside. The generation of cock and nitrogen oxide is controlled effectively by raising the ignition height of flame, thereby realizing placement of the combustor at the bottom of the hot air furnace. Compared with the conventional common arrangement way, the hot air furnace with the combustor at the bottom has the advantages that a pulverized coal conveying system is simplified, the powder feeding height is lowered greatly, the pulverized coal conveying energy consumption is lowered, the problem that an elbow of a pulverized coal conveying pipe tends to be worn easily is solved, and the mounting and using costs are lowered; the hot air furnace has the advantages of high combustion efficiency, compact structure, simple system, high automatic degree, saving of energy, environmental-friendliness and the like. The hot air furnace is mainly applied to the production and drying or indirect drying of products such as ceramic baking powder, clothes washing powder, washing aids and compound fertilizers.
Description
Technical field
The present invention relates to vertical hot furnace combustion technology, specifically refer to a kind of burner bottom type hot-blast stove.
Background technology
Traditional hot-blast stove is to utilize natural gas, heavy oil, electric heat source and steam thermal power as thermal medium, often configures many equipment in course of conveying, makes it final or indirectly forms the hot blast operation of drying or heat.The obvious existence of this process wastes energy in a large number and causes the shortcomings such as auxiliary device is too much, complex technical process.Only have the hot blast of utilization as medium and carrier could be larger improve heat utilization efficiency and hot working effect.Existing old-fashioned hot-blast stove has chain furnace, burning coal powder hot-blast stove, overhead burner hot-blast stove and water-coal-slurry hot-blast stove, their energy consumption is generally larger, wherein the conventional arrangement of its burner of burning coal powder hot-blast stove has overhead combustion-type and along circumference combustion-type etc., the structural representation of these two kinds of arrangements respectively as depicted in figs. 1 and 2.In Fig. 1-2, it is upper that burner 3' is located at hot-blast stove 1' with corresponding arrangement, and the lower end of powder storehouse 2' pulls out conveyance conduit and is connected to burner 3' above, and conveyance conduit needs conventionally also need to add abrasion-resistant metal elbow according to laying.
The vertical hot furnace of the conventional arrangement of current described burner not can solve the problems such as coking, but also there is following some shortcoming: coal powder conveying system is simplified not, powder feeding is highly high, coal dust conveying energy consumption is high, coal dust carrier pipe elbow is many and be easily worn, install inconvenient and use cost is high, be unfavorable for the adjustment of burner and maintenance etc.
In view of this, the problem that the inventor exists for existing hot-blast stove conducts in-depth research, and this case produces thus.
Utility model content
The purpose of this utility model is to provide a kind of burner bottom type hot-blast stove, has overcome well structure and the not good problem of combustibility of hot-blast stove described in the prior art.
In order to reach above-mentioned purpose, solution of the present utility model is:
A burner bottom type hot-blast stove, comprises hot-blast stove body and burner, and this burner is arranged on the bottom of described hot-blast stove body, and this burner has a pulverizer air setting gradually from the inside to the outside, three hypoxemia wind and secondary combustion-supporting wind; Coupling is arranged with an interlayer wind cover of being close to its madial wall in described hot-blast stove body, and this interlayer wind puts and is provided with the air inlet passing into for four interlayer wind.
Described air inlet is divided into enterprising air port and the lower air inlet arranging near upper and lower side, and the bore in this enterprising air port is greater than the bore of this lower air inlet.
Described hot-blast stove body by tip position, offer mixed wind outlet.
Described three hypoxemia wind are that oxygen content is 10% hypoxemia wind.
On described burner, the air outlet of corresponding pulverizer air, secondary combustion-supporting wind and three hypoxemia wind is respectively equipped with powder feeding pipe flow deflector, combustion air flow deflector, hypoxemia wind flow deflector.
Described powder feeding pipe flow deflector, combustion air flow deflector, hypoxemia wind flow deflector are all connected with being subject to the motor of Long-distance Control, and equal adjustable swirl vanes of formation activity.
The angle of regulation range of described powder feeding pipe flow deflector is controlled at 45 °～90 °, and the angle of regulation range of described combustion air flow deflector is controlled at 45 °～65 °, and the angle of regulation range of described hypoxemia wind flow deflector is controlled at 40 °～65 °.
Adopt after such scheme, this Novel photo is for the beneficial effect of prior art:
During Combustion of Hot Air Furnace, one-level powder feeding is sent into burner by a pulverizer air, by add hypoxemia wind three times between pulverizer air and secondary combustion-supporting wind, form the burning atmosphere of hypoxemia, postpone coal dust in the ignition time of burner outlet, postpone thus converging of secondary combustion-supporting wind and a pulverizer air, further improved the height that catches fire of flame.When flame burns in high-temperature region, add in time three times a large amount of hypoxemia wind, effectively control the temperature of burner hearth high-temperature region.Effectively control the generation of coal dust coking and nitrogen oxide.Further, on furnace wall, also pass into by four interlayer wind and (goodly from furnace wall, distinguish up and down different air quantity and carry with the required oxygen amount of aftercombustion, reach and sneak into equably in stove), and effectively prevented the superheating phenomenon of radiating layer material, also improved the air themperature of sending into hot-blast stove, fire box temperature is effectively controlled.By catch fire height and control burner hearth regional temperature and act on of described raising flame simultaneously, further effectively controlled the generation of coking and the generation of nitrogen oxide, this effect also makes to put in hot-blast stove and be achieved at the bottom of burner.
To sum up, it is compared with existing conventional arrangement at the bottom of this case burner, to put mode, simplified coal powder conveying system, significantly reduced powder feeding height, reduce coal dust conveying energy consumption, solve coal dust carrier pipe elbow problem easy to wear, reduced the cost of installing and using, there is the advantages such as efficiency of combustion is high, compact conformation, system is simple, automaticity is high, energy-saving and environmental protection.The production that is mainly used in the products such as ceramic baking powder, washing powder, washing assisant, composite fertilizer is dried or contact drying.
Accompanying drawing explanation
Fig. 1 is the structural representation of overhead burner combustion type hot air stove;
Fig. 2 is that burner is along the structural representation of circumference combustion-type;
Fig. 3 is the structure diagram in burner bottom type hot-blast stove of the present invention and fine coal storehouse.
Label declaration
Hot-blast stove 1' powder storehouse 2'
Burner 3'
Powder storehouse 1 conveying worm 11
The mixed wind outlet 21 of hot-blast stove body 2
3 powder feeding pipe 4 of burner
Primary air fan 41 secondary blast pipes 5
51 3 ajutages 6 of overfire air fan
61 4 ajutages 7 of tertiary air machine
No. four blower fan 71 interlayer wind covers 8
The specific embodiment
Below in conjunction with the drawings and specific embodiments, this case is described in further detail.
The present invention relates to a kind of burner bottom type hot-blast stove, as shown in Figure 3, comprise hot-blast stove body 2 and burner 3, this burner 3 is arranged on the bottom of hot-blast stove body 1, and burner 3 has a pulverizer air setting gradually from the inside to the outside, three hypoxemia wind and secondary combustion-supporting wind.
A pulverizer air of described burner 3 is a wind for powder feeding, and for powder, by 1 supply of powder storehouse, powder storehouse 1 is realized one-level powder feeding with 3 of burners by one-level powder feeding pipe 4 and is connected, and one-level powder feeding pipe 4 is connected with the primary air fan 41 for air blast.4 of powder storehouse 1 and one-level powder feeding pipe are also provided with the conveying worm 11 that is beneficial at the uniform velocity powder feeding.
On described burner 3, be connected with the secondary blast pipe 5 of realizing secondary combustion-supporting wind, this secondary blast pipe 5 is connected with the overfire air fan 51 for air blast.In like manner, be also connected with three ajutages 6 realizing three hypoxemia wind on described burner 3, these three ajutages 6 are connected with the tertiary air machine 61 for air blast.Preferably, it is 10% hypoxemia wind that described three hypoxemia wind are preferably oxygen content, and further, the wind regime of these three hypoxemia wind is the mixing wind of secondary combustion-supporting wind and a wind (air blast of primary air fan 41).In practical operation, can in the air intake vent of three hypoxemia wind, connect one and adjust air compartment, the inlet air pipeline of described secondary combustion-supporting wind and a wind draws respectively a small pipeline to described tune air compartment, two switch valves of controlling respectively small pipeline break-make described in two are installed on this tune air compartment, and this switch valve is electrically connected to extraneous controlling organization to realize and automatically opens or closing function.
Preferably, the interior coupling of hot-blast stove body 2 is arranged with an interlayer wind of being close to its madial wall and overlaps 8, and this interlayer wind cover 8 is provided with the air inlet (not shown) that four interlayer wind of confession pass into.On hot-blast stove body 2, be connected with four ajutages 7 realizing four interlayer wind, these four ajutages 7 are connected with No. four blower fans 71 for air blast.Further, referring to Fig. 3, described air inlet is divided into enterprising air port and the lower air inlet arranging near upper and lower side, and the bore in this enterprising air port is greater than the bore of this lower air inlet, to reach in interlayer wind cover 8, sneaks into equably the required oxygen amount of aftercombustion.
Preferably, hot-blast stove body 2 offers mixed wind outlet 21 by tip position.This mixed wind outlet 21 is according to hot air technique requirement design, the outlet wind-warm syndrome of hot-blast stove can be down to the required temperature of technique.
Preferably, on burner 3, the air outlet of corresponding pulverizer air, secondary combustion-supporting wind and three hypoxemia wind is respectively equipped with powder feeding pipe flow deflector, combustion air flow deflector, hypoxemia wind flow deflector.This powder feeding pipe flow deflector, combustion air flow deflector, hypoxemia wind flow deflector are all connected with being subject to the motor of remote control, thus equal adjustable swirl vanes of formation activity.By adjusting the angle of primary and secondary air swirl vane, under low excess air coefficient, further elongate the height that catches fire of flame, the application of multistage air distribution technology in addition, particularly at four interlayer wind of oxygen-enriched burner (burning-out zone), make fuel abundant mixed combustion after-flame in the effective height of burner hearth, suppressed the generation of fuel NO, reduced the discharge of nitrogen oxide.
The angle of regulation range of described powder feeding pipe flow deflector is preferably controlled at 45 °～90 °, during work, according to the variation of hot blast load, regulate powder feeding pipe flow deflector angle, adjustable coal dust is in burner hearth rotational flow intensity inside, the time of staying and flame profile, can realize being uniformly distributed of the interior temperature of burner hearth, improve the burn-off rate of coal dust, improve Thermal Efficiency of Hot Blast Stoves, effectively prevent burner hearth coking.And described powder feeding pipe flow deflector angle is adjustable, be conducive to hot-blast stove at various operating mode down-firings, the 10 tons of hot-blast stoves of take are example, can realize and in 2 minutes, complete hot-blast stove ignition operation.
The angle of regulation range of described combustion air flow deflector is preferably controlled at 45 °～65 °, and during work, by regulating combustion air flow deflector angle and combustion air amount can realize the adjusting to Combustion of Hot Air Furnace state, hot-blast stove load can be realized stable regulation.
The angle of regulation range of described hypoxemia flow deflector is preferably controlled at 40 °～65 °, during work, fully mix with a wind, reduce burner hearth bottom oxygen content, make coal dust be controlled at 65%～70% at the combustion share in burner hearth bottom region, control burner hearth bottom temperature below 1050 ℃, effectively reduce the generation of high temperature modification nitrogen oxide and reduce coking phenomenon.Nitrogen oxide in flue gas produces reduction reaction under hypoxemia operating mode, further reduces amount of nitrogen oxides in flue gas, realizes low nitrogen burning.Along main by four interlayer wind evenly sending into from top to bottom in burner hearth interlayer, guarantee coal dust in burner hearth, the required oxygen amount of upper area after-flame, make coal dust be enough to abundant after-flame.
The adjusting angle of above powder feeding pipe flow deflector, combustion air flow deflector and hypoxemia wind flow deflector is that the cross-sectional direction with the outlet place of each airduct is as the criterion.Corresponding preferably angle control range obtains through repetition test, analysis in actual applications.
The foregoing is only this novel preferred embodiment, all equalizations of doing with this novel claim scope change and modify, and all should belong to the scope of this novel claim.
Claims (7)
1. a burner bottom type hot-blast stove, comprise hot-blast stove body and burner, it is characterized in that: this burner is arranged on the bottom of described hot-blast stove body, this burner has a pulverizer air setting gradually from the inside to the outside, three hypoxemia wind and secondary combustion-supporting wind; Coupling is arranged with an interlayer wind cover of being close to its madial wall in described hot-blast stove body, and this interlayer wind puts and is provided with the air inlet passing into for four interlayer wind.
2. a kind of burner bottom type hot-blast stove as claimed in claim 1, is characterized in that: described air inlet is divided into enterprising air port and the lower air inlet arranging near upper and lower side, and the bore in this enterprising air port is greater than the bore of this lower air inlet.
3. a kind of burner bottom type hot-blast stove as claimed in claim 1, is characterized in that: described hot-blast stove body by tip position, offer mixed wind outlet.
4. a kind of burner bottom type hot-blast stove as claimed in claim 1, is characterized in that: described three hypoxemia wind are that oxygen content is 10% hypoxemia wind.
5. a kind of burner bottom type hot-blast stove as claimed in claim 1, is characterized in that: on described burner, the air outlet of corresponding pulverizer air, secondary combustion-supporting wind and three hypoxemia wind is respectively equipped with powder feeding pipe flow deflector, combustion air flow deflector, hypoxemia wind flow deflector.
6. a kind of burner bottom type hot-blast stove as claimed in claim 5, is characterized in that: described powder feeding pipe flow deflector, combustion air flow deflector, hypoxemia wind flow deflector are all connected with being subject to the motor of Long-distance Control, and equal adjustable swirl vanes of formation activity.
7. a kind of burner bottom type hot-blast stove as claimed in claim 5, it is characterized in that: the angle of regulation range of described powder feeding pipe flow deflector is controlled at 45 °～90 °, the angle of regulation range of described combustion air flow deflector is controlled at 45 °～65 °, and the angle of regulation range of described hypoxemia wind flow deflector is controlled at 40 °～65 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320755323.2U CN203824074U (en) | 2013-11-22 | 2013-11-22 | Hot air furnace with combustor at bottom |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320755323.2U CN203824074U (en) | 2013-11-22 | 2013-11-22 | Hot air furnace with combustor at bottom |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203824074U true CN203824074U (en) | 2014-09-10 |
Family
ID=51479561
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320755323.2U Expired - Lifetime CN203824074U (en) | 2013-11-22 | 2013-11-22 | Hot air furnace with combustor at bottom |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203824074U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107436034A (en) * | 2017-08-30 | 2017-12-05 | 岳中 | A kind of floated coal dust firing atmospheric energy-saving, environmentally friendly hot-blast stove |
| CN109140434A (en) * | 2018-09-30 | 2019-01-04 | 武汉奥杰科技股份有限公司 | A kind of Multi-stage spiral coal burner |
| CN109158276A (en) * | 2018-11-06 | 2019-01-08 | 江苏图博可特曙光涂层有限公司 | A kind of special nonpetroleum pipe special coated and dried device |
-
2013
- 2013-11-22 CN CN201320755323.2U patent/CN203824074U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107436034A (en) * | 2017-08-30 | 2017-12-05 | 岳中 | A kind of floated coal dust firing atmospheric energy-saving, environmentally friendly hot-blast stove |
| CN109140434A (en) * | 2018-09-30 | 2019-01-04 | 武汉奥杰科技股份有限公司 | A kind of Multi-stage spiral coal burner |
| CN109158276A (en) * | 2018-11-06 | 2019-01-08 | 江苏图博可特曙光涂层有限公司 | A kind of special nonpetroleum pipe special coated and dried device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140910 |
|
| CX01 | Expiry of patent term |