CN108821615A - Annular lime kiln injector - Google Patents
Annular lime kiln injector Download PDFInfo
- Publication number
- CN108821615A CN108821615A CN201810770303.XA CN201810770303A CN108821615A CN 108821615 A CN108821615 A CN 108821615A CN 201810770303 A CN201810770303 A CN 201810770303A CN 108821615 A CN108821615 A CN 108821615A
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- CN
- China
- Prior art keywords
- gas
- injector
- pipe
- circulating flue
- outer tube
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Classifications
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- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2/00—Lime, magnesia or dolomite
- C04B2/10—Preheating, burning calcining or cooling
- C04B2/12—Preheating, burning calcining or cooling in shaft or vertical furnaces
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The present invention provides a kind of annular lime kiln injector, it includes ejector pipe, bellmouth entrance pipe, mixing tube, diffuser pipe, it further include the outer tube gas burner being connected on the outside of the ejector pipe, which is arranged to be suitable for from external reception combustion gas and combustion gas is made to burn in the mixed gas of driving air and circulating flue gas.Since the present invention is additionally arranged outer tube gas burner, combustion gas is burnt in the mixed gas of driving air and circulating flue gas, to discharge heat to improve circulating flue gas and the driving mixed mixed gas temperature of air, the adiabatic condensation temperature of sodium, potassium steam is made it higher than（800℃）To avoid injector blockage problem from occurring, which not only improves the service life of injector and the running rates of sleeve kiln, it can also be achieved the fractional combustion of fuel, be conducive to improve the temperature uniformity of sleeve kiln lower combustion chamber, the formation of local high temperature zone is avoided, to further suppress the generation of thermal NO x.
Description
Technical field：
The present invention relates to a kind of injection apparatus of industrial kiln, in particular to a kind of annular lime kiln injector.
Background technique：
Annular lime kiln has convenient maintenance, environmental protection, operating rate height, finished product Activity of Lime as universally acknowledged high-quality shaft furnace
Degree is high, the advantages that multiple types inferior fuel can be used, this kiln type has been widely used.Pass of the injector as sleeve kiln
Button apparatus can form flue gas recirculation, thus in sleeve kiln by the driving air ejection inner sleeve flue gas of high-energy in kiln
Interior formation cocurrent burning zone achievees the purpose that produce active lime.
Since limestone mine impure ingredient in various regions is different, along with the difference of the ingredient of fuel, the annular in individual areas
There is blockage problem in injector on sleeve kiln, needs a cleaning in month primary when blocking serious.And when clearing up injector, it needs
The circulation air valve for individually closing injector for clearance, after ejector pipe is hung out, using 5 meters long drill rod manual cleaning, slightly not
Careful drill rod may can fall into lower combustion chamber, moreover, serious to endanger since this operation is carried out in the case where not stopping kiln
And to operator's safety, while also affecting the continuous operation and finished product lime production of annular lime kiln.
Here is the Crack cause of injector blocking：
Since sodium, potassium content are higher in the limestone mine of some areas, lime stone in sleeve kiln calcination process, it is such containing sodium,
The inorganic compound of potassium volatilizes sodium, potassium steam at high temperature, is entrained in circulating flue gas.
In annular lime kiln, since the temperature for driving wind that driving air is formed is 400 DEG C, the temperature of circulating flue gas is
800 DEG C, at 700 DEG C or so, this results in circulating flue gas by injector for driving wind and the mixed temperature of circulating flue gas
When the pipe of bellmouth entrance, there is condensation phenomenon in sodium, potassium steam in mixed gas.Sodium, the potassium of this partial coagulation can be attached to spray
On the bellmouth entrance pipe of emitter and the inner wall of mixing tube, and eutectic is formed in conjunction with inorganic compounds other in circulating flue gas
Point eutectic increases injector inlet tube and mixes the surface viscosity of inside pipe wall.Flying dust in circulating air is by mixing tube
When inner wall, it can be deposited here because of the viscosity of inner wall surface.With the passage of process, new sodium, potassium steam persistently condense
Here, it causes more flying dusts to deposit, forms a vicious circle.When above-mentioned phenomenon is serious, it is effectively negative to will lead to injector
Pressure area reduces, to affect entire kiln body circulating flow rate, kiln bottom cooling air quantity reduces, and ash discharge temperature increases, and heat consumption increases.
For this purpose, each production unit is seeking always the scheme for thoroughly solving the problems, such as this.
Summary of the invention：
To overcome above-mentioned blockage problem, the present invention provides a kind of annular that mixed gas temperature is improved with fuel gas buring function
Sleeve kiln injector will be advantageous.
For this purpose, the present invention provides a kind of annular lime kiln injector comprising for feed drive air ejector pipe,
It manages, for making that air and circulating flue gas is driven wherein to form the mixed of mixed gas bellmouth entrance for receiving circulating flue gas
Close pipe and the diffuser pipe below mixing tube, which further includes be connected to the ejector pipe outer
Outer tube gas burner in portion, wherein the outer tube gas burner is arranged to be suitable for receiving combustion gas from outside and makes to fire
Gas burns in the mixed gas of driving air and circulating flue gas.
Further, above-mentioned outer tube gas burner sealing welding is on the outside of ejector pipe.
Further, evenly distributed in the circumferential direction on the lower end surface of above-mentioned outer tube gas burner to have multiple gas injections
Mouthful.
Further, above-mentioned combustion gas spout is consistent with ejector pipe export direction.
Further, fuel gas inlet is provided on above-mentioned outer tube gas burner.
Further, circulating flue gas import is provided on above-mentioned bellmouth entrance pipe.
Compared with the prior art, since the present invention is additionally arranged outer tube gas burner, enable combustion gas empty in driving
It burns in the mixed gas of gas and circulating flue gas, to discharge heat, to improve circulating flue gas, air is mixed mixes with driving
Gas temperature makes it higher than the adiabatic condensation temperature of sodium, potassium steam（800℃）, so that injector blockage problem be avoided to occur, this is not only
The service life of injector and the running rate of sleeve kiln are improved, can also be achieved the fractional combustion of fuel, is conducive to improve sleeve
The temperature uniformity of kiln lower combustion chamber, avoids the formation of local high temperature zone, to further suppress the generation of thermal NO x.
By reference to the embodiments described below, above-mentioned these and other aspects of the invention will obtain more clear
It illustrates clearly.
Detailed description of the invention：
The structure of invention and further objects and advantages will be better understood by description with reference to the accompanying drawing,
In, identical reference marker identifies identical element：
Fig. 1 is the structural schematic diagram of the annular lime kiln injector of a specific embodiment according to the present invention；
Fig. 2 is the structural schematic diagram of the ejector pipe of annular lime kiln injector and outer tube gas burner in Fig. 1；
Fig. 3 be structure shown in Fig. 2 along A to plan view.
Specific embodiment：
A specific embodiment of the invention is described below in conjunction with attached drawing.
As shown in Figure 1, and combine Fig. 2 and Fig. 3, in the present embodiment, annular lime kiln injector includes ejector pipe
1, outer tube gas burner 2, bellmouth entrance pipe 3, mixing tube 4 and diffuser pipe 5.Wherein, ejector pipe 1 is for conveying high velocity stream
Dynamic driving air；Outer tube gas burner 2 is connected on the outside of the ejector pipe 1, and specifically sealing welding is in ejector pipe 1
Outside on, and it is evenly distributed in the circumferential direction on the lower end surface of outer tube gas burner 2 have multiple combustion gas spouts 25,
These combustion gas spouts 25 are consistent with 14 direction of outlet of ejector pipe 1, are additionally provided with fuel gas inlet on outer tube gas burner 2
23；Bellmouth entrance pipe 3 is specifically provided with circulating flue gas import 36 for receiving circulating flue gas；Mixing tube 4 comes for making
From the driving air of ejector pipe 1 and circulating flue gas mixed gas formed therein that from bellmouth entrance pipe 3, diffuser pipe 5
In 4 lower section of mixing tube.
It should be noted that although referring to bellmouth entrance pipe 3 in the present embodiment, but it should be understood that,
It can be other shapes, as long as can ensure that recyclegas can smoothly enter into it and converge into mixing tube 4.
As depicted in figs. 1 and 2, the construction of outer tube gas burner 2 is by fuel gas inlet 23 thereon from outside（Example
Combustion gas as a part originally entered annular lime kiln from the lower combustion chamber of annular lime kiln is distributed by the fuel gas inlet 23
It burns into outer tube gas burner 2）Combustion gas is received, and via more on the lower end surface for being located at outer tube gas burner 2
A combustion gas spout 25 sprays, and so that combustion gas is burnt in the mixed gas of driving air and circulating flue gas, to discharge heat, this is mentioned
High circulating flue gas and the driving mixed mixed gas temperature of air（Flue gas and the driving mixed temperature of air in the prior art
Degree is only up to 700 DEG C）, make it higher than the adiabatic condensation temperature of sodium, potassium steam（800℃）, so that injector blockage problem be avoided to occur.
In addition, after using the above-mentioned injector with fuel gas buring, by by a part originally from the lower combustion of annular lime kiln
It burns the combustion gas that room enters and is assigned in outer tube gas burner 2 and burn, to realize the fractional combustion of lower combustion chamber's combustion gas.This
On the one hand since a part of combustion gas is burnt in bellmouth entrance pipe 3 and mixing tube 4, the oxygen in a part of mixed gas is consumed
Gas can make the oxygen concentration in lower combustion chamber be reduced to 15% or less；On the other hand the gaseous mixture body temperature into lower combustion chamber is improved
Degree, to form a high-temperature low-oxygen environment in lower combustion chamber, combustion gas is such as split first in this high-temperature low-oxygen atmosphere
The regrouping process such as solution, formation and the entirely different thermodynamic condition of traditional combustion process are delaying shape to burn with Poor oxygen gas work
Lower release heat does not occur the hyperoxia area of localized hyperthermia during traditional combustion, can effectively inhibit the generation of thermal NO x.
This burning is a kind of dynamic response, does not have static flame, is a smouldering combustion process.
In conclusion after using the above-mentioned this injector with fuel gas buring on annular lime kiln, ejection efficiency raising,
Coefficient of second air reduces, injector scale formation is obviously improved.More importantly the stable operation of injector can make annular sleeve
Cylinder kiln forms stable cocurrent burning zone, improves the quality of calcining product, increases the heat storage in kiln, kiln top and ash discharge temperature drop
It is low, to keep system heat consumption lower.
Technology contents and technical characterstic of the invention have revealed that as above, it being understood, however, that in creative ideas of the invention
Under, those skilled in the art can make various changes and improve to above structure, protect including individually disclose here or requirement
The combination of the technical characteristic of shield, and significantly include other combinations of these features.These deformations and/or combination each fall within this
In technical field involved in inventing, and fall into the protection scope of the claims in the present invention.
Claims (6)
1. a kind of annular lime kiln injector comprising for the ejector pipe of feed drive air, for receiving circulating flue gas
Bellmouth entrance pipe, for making that air and circulating flue gas is driven wherein to form the mixing tube of mixed gas and be located at mixed
Close the diffuser pipe below pipe, which is characterized in that it further include the outer tube gas burner being connected on the outside of the ejector pipe,
In, which is arranged to be suitable for receive combustion gas from external and make combustion gas in the mixed of driving air and circulating flue gas
It closes and burns in gas.
2. annular lime kiln injector according to claim 1, which is characterized in that the outer tube gas burner is close
Soldering and sealing is connected on the outside of the ejector pipe.
3. annular lime kiln injector according to claim 1 or 2, which is characterized in that the outer tube fuel gas buring
It is evenly distributed in the circumferential direction on the lower end surface of device to have multiple combustion gas spouts.
4. annular lime kiln injector according to claim 3, which is characterized in that the combustion gas spout and the injection
Pipe export direction is consistent.
5. annular lime kiln injector according to claim 1, which is characterized in that on the outer tube gas burner
It is provided with fuel gas inlet.
6. annular lime kiln injector according to claim 1, which is characterized in that be arranged on the bellmouth entrance pipe
There is circulating flue gas import.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810770303.XA CN108821615B (en) | 2018-07-13 | 2018-07-13 | Injector for annular sleeve kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810770303.XA CN108821615B (en) | 2018-07-13 | 2018-07-13 | Injector for annular sleeve kiln |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108821615A true CN108821615A (en) | 2018-11-16 |
| CN108821615B CN108821615B (en) | 2023-06-27 |
Family
ID=64137311
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810770303.XA Active CN108821615B (en) | 2018-07-13 | 2018-07-13 | Injector for annular sleeve kiln |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108821615B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113758297A (en) * | 2021-09-17 | 2021-12-07 | 北京首钢股份有限公司 | Spray gun device of ejector and Bekenbach annular sleeve kiln |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1237583A (en) * | 1968-05-16 | 1971-06-30 | Tokyo Gas Co Ltd | Gas burner |
| CN201289085Y (en) * | 2008-10-28 | 2009-08-12 | 青岛瑞德新能源工程技术有限公司 | Gas overgrate air combustor |
| CN102798124A (en) * | 2012-08-22 | 2012-11-28 | 四川达兴能源股份有限公司 | Gas combustion method for primary reformer of methanol device and combustor for reformer |
| CN103776029A (en) * | 2012-10-26 | 2014-05-07 | 陕西龙海工程建设有限公司 | Burner spray gun structure capable of preventing fuel adhesion |
| CN208485809U (en) * | 2018-07-13 | 2019-02-12 | 江苏中圣园科技股份有限公司 | Annular lime kiln injector |
-
2018
- 2018-07-13 CN CN201810770303.XA patent/CN108821615B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1237583A (en) * | 1968-05-16 | 1971-06-30 | Tokyo Gas Co Ltd | Gas burner |
| CN201289085Y (en) * | 2008-10-28 | 2009-08-12 | 青岛瑞德新能源工程技术有限公司 | Gas overgrate air combustor |
| CN102798124A (en) * | 2012-08-22 | 2012-11-28 | 四川达兴能源股份有限公司 | Gas combustion method for primary reformer of methanol device and combustor for reformer |
| CN103776029A (en) * | 2012-10-26 | 2014-05-07 | 陕西龙海工程建设有限公司 | Burner spray gun structure capable of preventing fuel adhesion |
| CN208485809U (en) * | 2018-07-13 | 2019-02-12 | 江苏中圣园科技股份有限公司 | Annular lime kiln injector |
Non-Patent Citations (1)
| Title |
|---|
| 赵军友;王秀会;赵金睿;王少波;刘祥猛;万法伟;: "喷射式套管气回收装置设计与实验研究" * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113758297A (en) * | 2021-09-17 | 2021-12-07 | 北京首钢股份有限公司 | Spray gun device of ejector and Bekenbach annular sleeve kiln |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108821615B (en) | 2023-06-27 |
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