CN104422275A - Structure for supplying air into rotary kiln - Google Patents
Structure for supplying air into rotary kiln Download PDFInfo
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- CN104422275A CN104422275A CN201310407917.9A CN201310407917A CN104422275A CN 104422275 A CN104422275 A CN 104422275A CN 201310407917 A CN201310407917 A CN 201310407917A CN 104422275 A CN104422275 A CN 104422275A
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- jet pipe
- kiln
- pipe
- base
- rotary kiln
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Abstract
The invention discloses a structure for supplying air into a rotary kiln. The problems that an air supply spraying pipe is shorter due to high-temperature melting, is finally blocked by a material and is over-short in service life due to disengagement of a castable for protecting a nozzle at the air supply spraying pipe of an existing structure for supplying the air into a kiln body are solved; meanwhile, the problems of longer replacement period and serious influence on production caused by the fact that the kiln needs to be stopped for cut welding and the castable needs to be recast once the spraying pipe is damaged due to the fact that the existing air supply structure is a non-detachable fixed welding structure are further solved. The structure for supplying the air into the rotary kiln comprises the spraying pipe, a kiln shell and a gas inlet pipe, wherein one end of the spraying pipe is communicated with the gas inlet pipe; the spraying pipe is made of a refractory material; the end, communicated with the gas inlet pipe, of the spraying pipe is arranged on the outer side of the kiln shell; one end of the spraying pipe penetrates through the kiln shell and extends into the kiln body. The structure is used for a production process in which the rotary kiln serves as calcining equipment.
Description
Technical field
The present invention relates to a kind of air-supply structure, be specifically related to a kind of structure to rotary kiln body inner blower.
Background technology
At present, in charcoal element is produced, use rotary kiln as calciner, in the middle part of kiln and afterbody generally arranges two, tertiary air is as the combustion air of fugitive constituent burning in kiln.In prior art, air nozzle generally adopts following frame mode: heat resisting pipe stretches in kiln near central axis from kiln always, and steel pipe root welds with kiln metal cylinder, and the some anchoring pieces of steel pipe external welding are to fix the castable that periphery is wrapped up.The defect of this spline structure is:
1, because the castable refractory of heat resisting pipe and its periphery at high temperature expands inconsistent, add airflow scouring in pipe, and manage the reasons such as outer material washes away, nozzle castable is caused to come off, thus make the high temperature of steel pipe directly more than 1300 DEG C in kiln occur the phenomenon of softening melting, nozzle is thus shorter and shorter, finally makes material enter and block, service life generally at 3 months to six months;
2, because this is a kind of fixing Welding Structure that can not change, nozzle, once damage, must stop kiln cutting welding and lay equal stress on and build castable, cause the longer replacement cycle, have a strong impact on production.
Obviously, existing rotary kiln air nozzle structure is not ideal enough.
Summary of the invention
The object of the invention is to: a kind of structure to rotary kiln inner blower is provided, to solve the existing structure to kiln body inner blower, because the castable of the jet pipe place protection nozzle for blowing comes off, and then the jet pipe Yin Gaowen caused dissolves and shorter and shorter, finally by feed blocking, and the problem that service life is too short; Meanwhile, also solve existing air-supply structure owing to being the fixing Welding Structure that can not change, jet pipe, once damage, must stop kiln cutting welding and double teeming castable, cause the longer replacement cycle, have a strong impact on the problem of production.
The solution of the present invention is as follows: a kind of structure to rotary kiln inner blower, comprises jet pipe, kiln shell and air inlet pipe, and one end of jet pipe is connected with air inlet pipe, and the other end of described jet pipe passes kiln shell and stretches at kiln body inner, and jet pipe is made up of refractory material.
The central axis place of to stretch in one end of kiln body inside at kiln body stretched by described jet pipe.
Also be provided with base between described jet pipe and kiln shell, base is fixed on kiln shell, seals between the inwall of base and the outer wall of jet pipe, and one end of base is arranged on the outside of kiln shell, and is connected with air inlet pipe.
Flange joint is passed through between described base and air inlet pipe.
Refractory fibre is filled with between described jet pipe and base.
Reinforcement gusset is fixed with between described base and kiln shell.
Described jet pipe is bamboo shoot shape structure, and jet pipe one end of stretching in kiln body is one end that external diameter is relatively little,
The inwall of described base is tapered tubular structure, and the tapering of base inwall and the tapering of jet pipe outer wall match, and the minimum diameter of base is less than the maximum outside diameter of jet pipe.
One end that described air inlet pipe is connected with jet pipe is bent tubular construction, and the terminal extension of the straight-run of pipe that air inlet pipe is connected with jet pipe is provided with blind hole.
Compared with prior art, major advantage is in the present invention:
1, jet pipe is made up of refractory material, make the outside of jet pipe without the need to building for the protection of jet pipe not by the castable of high temperature sintering, air-supply structure is simplified, simultaneously, jet pipe can not melt because of high temperature in kiln, thus avoids jet pipe Yin Gaowen and dissolve shorter and shorter, finally by feed blocking, the problem that service life is too short, decreases the maintenance cost and production loss that cause because jet pipe damages;
2, the central axis place of to stretch in one end of kiln body inside at kiln body stretched by jet pipe, prevents the material in a large amount of kiln from entering jet pipe and by blockage of spray pipe;
3, refractory fibre is filled with between jet pipe and base, so that heat insulation and as the buffering area after high-temperature expansion.
4, jet pipe is bamboo shoot shape structure and is supported by base, and make the installation of jet pipe and dismantle all very convenient, only need pull down air inlet pipe can take out jet pipe, is convenient to maintenance;
5, set in air inlet pipe blind hole makes air-supply arrangement when forwarding the downside of kiln body central axis place plane to, temporarily can store a small amount of material or the impurity that are entered air inlet pipe by jet pipe, when air-supply arrangement forwards the upside of kiln body central axis place plane to, by jet pipe, the material in blind hole or impurity are discharged, avoid material or impurity blocking air inlet pipe or nozzle.
Accompanying drawing explanation
Fig. 1 is cross-sectional view of the present invention.
Detailed description of the invention
With reference to Fig. 1, the overfire air jet structure of certain φ 2840 rotary kiln, comprise jet pipe 1, kiln shell 4 and air inlet pipe 3, one end of jet pipe 1 is connected with air inlet pipe 3, described jet pipe 1 is made up of refractory material, one end that jet pipe 1 is connected with air inlet pipe 3 is arranged on the outside of kiln shell 4, and jet pipe 1 is bamboo shoot shape structure, and the relatively little one end of jet pipe 1 external diameter is through kiln shell 4 and the central axis place of stretching at kiln body.
Base 2 is provided with between described jet pipe 1 and kiln shell 4, base 2 is made up of heating resisting metal, weld mutually with cylinder of rotary kiln, inside and outside two-layer reinforcement gusset 6 is also fixed with between base 2 and kiln shell 4, the inwall of base 2 is cone tubular structure, the tapering of base 2 inwall and the tapering of jet pipe 1 outer wall match, and the minimum diameter of base 2 is less than the maximum outside diameter of jet pipe 1.Seal between the inwall of base 2 and the outer wall of jet pipe 1, and be provided with refractory fibre between the two, one end of base 2 is arranged on the outside of kiln shell 4, and is connected by flange with air inlet pipe 3.Air inlet pipe 3 is common metal tubular constructions that high alumina castable makes liner, and one end that air inlet pipe 3 is connected with jet pipe 1 is " L " shape tubular construction, and the terminal extension of the straight-run of pipe that air inlet pipe 3 is connected with jet pipe 1 is provided with blind hole 5.
Blind hole 5 set in air inlet pipe 3 makes air-supply arrangement when forwarding the downside of kiln body central axis place plane to, temporarily can store a small amount of material or the impurity that are entered air inlet pipe 3 by jet pipe 1, when air-supply arrangement forwards the upside of kiln body central axis place plane to, by jet pipe 1, the material in blind hole 5 or impurity are sent in kiln body again.
Described jet pipe 1 length is 700mm ~ 1300mm, and the external diameter of the relatively large one end of external diameter is φ 150mm ~ φ 500mm, and the external diameter of the relatively little one end of external diameter is φ 100mm ~ φ 300mm, and the inside of jet pipe 1 is cylindrical tube or the Taper Pipe of φ 50mm ~ φ 200mm.
The internal diameter of the larger one end of described base 2 internal diameter is φ 150mm ~ φ 500mm, and the internal diameter of the less one end of internal diameter is φ 120mm ~ φ 450mm, and wall thickness is 5mm ~ 20mm; Described refractory fibre is refractory fiber blanket, and the thickness of refractory fiber blanket is 5mm ~ 10mm, very thin, does not draw in the drawings.
Described air inlet pipe 3 internal diameter is φ 50mm ~ φ 200mm, and the degree of depth of blind hole 5 is 30mm ~ 100mm.
Claims (9)
1. the structure to rotary kiln inner blower, comprise jet pipe (1), kiln shell (4) and air inlet pipe (3), one end of jet pipe (1) is connected with air inlet pipe (3), it is characterized in that: the other end of described jet pipe (1) passes kiln shell (4) and stretches at kiln body inner, and jet pipe (1) is made up of refractory material.
2. a kind of structure to rotary kiln inner blower according to claim 1, is characterized in that: the central axis place of to stretch in one end of kiln body inside at kiln body stretched by described jet pipe (1).
3. a kind of structure to rotary kiln inner blower according to claim 1 or 2, it is characterized in that: between described jet pipe (1) and kiln shell (4), be also provided with base (2), base (2) is fixed on kiln shell (4), seal between the inwall of base (2) and the outer wall of jet pipe (1), one end of base (2) is arranged on the outside of kiln shell (4), and is connected with air inlet pipe (3).
4. a kind of structure to rotary kiln inner blower according to claim 3, is characterized in that: pass through Flange joint between described base (2) and air inlet pipe (3).
5. a kind of structure to rotary kiln inner blower according to claim 3, is characterized in that: be filled with refractory fibre between described jet pipe (1) and base (2).
6. a kind of structure to rotary kiln inner blower according to claim 3, is characterized in that: be fixed with between described base (2) and kiln shell (4) and strengthen gusset (6).
7. a kind of structure to rotary kiln inner blower according to claim 1 or 2, is characterized in that: described jet pipe (1) is bamboo shoot shape structure, and jet pipe (1) one end of stretching in kiln body is one end that external diameter is relatively little.
8. a kind of structure to rotary kiln inner blower according to claim 7, it is characterized in that: the inwall of described base (2) is tapered tubular structure, the tapering of base (2) inwall and the tapering of jet pipe (1) outer wall match, and the minimum diameter of base (2) is less than the maximum outside diameter of jet pipe (1).
9. a kind of structure to rotary kiln inner blower according to claim 1 or 2, it is characterized in that: one end that described air inlet pipe (3) is connected with jet pipe (1) is bent tubular construction, the terminal extension of the upper straight-run of pipe be connected with jet pipe (1) of air inlet pipe (3) is provided with blind hole (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310407917.9A CN104422275A (en) | 2013-09-10 | 2013-09-10 | Structure for supplying air into rotary kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310407917.9A CN104422275A (en) | 2013-09-10 | 2013-09-10 | Structure for supplying air into rotary kiln |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104422275A true CN104422275A (en) | 2015-03-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310407917.9A Pending CN104422275A (en) | 2013-09-10 | 2013-09-10 | Structure for supplying air into rotary kiln |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1667335A (en) * | 2004-03-09 | 2005-09-14 | 徐向成 | Composite secondary and triple lance of charcoal rotary kiln and making method thereof |
| JP2006308173A (en) * | 2005-04-27 | 2006-11-09 | Takasago Ind Co Ltd | Batch type rotary kiln |
| CN201740373U (en) * | 2010-05-28 | 2011-02-09 | 中国有色（沈阳）冶金机械有限公司 | Air supply device with flexible connection for rotary kiln |
| CN202166308U (en) * | 2011-07-20 | 2012-03-14 | 天津市欣德泰铁粉有限公司 | Oxygen convey system for rotary kiln |
| CN202648378U (en) * | 2012-05-31 | 2013-01-02 | 富顺县电力金具有限公司 | Novel rotary converter |
| CN103017515A (en) * | 2013-01-24 | 2013-04-03 | 沈阳创联炉窑技术有限公司 | Carbon calcining rotary kiln |
-
2013
- 2013-09-10 CN CN201310407917.9A patent/CN104422275A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1667335A (en) * | 2004-03-09 | 2005-09-14 | 徐向成 | Composite secondary and triple lance of charcoal rotary kiln and making method thereof |
| JP2006308173A (en) * | 2005-04-27 | 2006-11-09 | Takasago Ind Co Ltd | Batch type rotary kiln |
| CN201740373U (en) * | 2010-05-28 | 2011-02-09 | 中国有色（沈阳）冶金机械有限公司 | Air supply device with flexible connection for rotary kiln |
| CN202166308U (en) * | 2011-07-20 | 2012-03-14 | 天津市欣德泰铁粉有限公司 | Oxygen convey system for rotary kiln |
| CN202648378U (en) * | 2012-05-31 | 2013-01-02 | 富顺县电力金具有限公司 | Novel rotary converter |
| CN103017515A (en) * | 2013-01-24 | 2013-04-03 | 沈阳创联炉窑技术有限公司 | Carbon calcining rotary kiln |
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Application publication date: 20150318 |