CN103601376B - Sleeve type double-hearth shaft kiln - Google Patents
Sleeve type double-hearth shaft kiln Download PDFInfo
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- CN103601376B CN103601376B CN201310579594.1A CN201310579594A CN103601376B CN 103601376 B CN103601376 B CN 103601376B CN 201310579594 A CN201310579594 A CN 201310579594A CN 103601376 B CN103601376 B CN 103601376B
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- kiln
- inner sleeve
- type double
- sleeve
- hearth
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 4
- 239000010959 steel Substances 0.000 claims abstract description 4
- 210000000038 chest Anatomy 0.000 claims description 55
- 239000000446 fuel Substances 0.000 claims description 22
- 238000001816 cooling Methods 0.000 claims description 18
- 230000001681 protective effect Effects 0.000 claims description 17
- 238000001354 calcination Methods 0.000 claims description 12
- 239000011449 brick Substances 0.000 claims description 9
- 238000002485 combustion reaction Methods 0.000 claims description 7
- 238000007599 discharging Methods 0.000 claims description 3
- 239000011819 refractory material Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract description 9
- 238000000034 method Methods 0.000 abstract description 6
- 235000008733 Citrus aurantifolia Nutrition 0.000 abstract description 4
- 235000011941 Tilia x europaea Nutrition 0.000 abstract description 4
- 239000004571 lime Substances 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000010276 construction Methods 0.000 abstract description 2
- 229910000514 dolomite Inorganic materials 0.000 abstract 1
- 239000010459 dolomite Substances 0.000 abstract 1
- 239000002994 raw material Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 4
- 239000002912 waste gas Substances 0.000 description 4
- 238000004873 anchoring Methods 0.000 description 3
- 239000007921 spray Substances 0.000 description 3
- 230000007812 deficiency Effects 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000004449 solid propellant Substances 0.000 description 1
- 230000003245 working effect Effects 0.000 description 1
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- Muffle Furnaces And Rotary Kilns (AREA)
- Furnace Details (AREA)
Abstract
The invention relates to the field of roasting kilns and in particular relates to a sleeve type double-hearth shaft kiln. The sleeve type double-hearth shaft kiln is characterized in that inner sleeves are respectively arranged at the centers of two kiln hearths; the upper ends of the inner sleeves are hinged to the upper sides of the kiln hearths; the end sockets of axial positioning clamps are hinged to kiln hearth shells; the inner sleeves are of steel structure bodies from bottom to top; protection covers made of fireproof materials are built outside the inner sleeves; air channels are formed in the inner sleeves; the specification and the size of the shaft kiln are only related to a regional area of an annular section; basically, heights of a preheating region, a roasting region and the like of the kiln body are not changed along with the change of the specification of the kiln. Compared with the prior art, the sleeve type double-hearth shaft kiln disclosed by the invention has the beneficial effects that the resistance loss of the kiln body is low, the phenomenon that heat cannot be distributed uniformly in a roasting process is improved, the quality of a product is high, electric energy can be saved, and the problem in large sizes of lime and dolomite double-hearth shaft kilns is solved; the sleeve type double-hearth shaft kiln is suitable for new construction, reconstruction and extension and the technical design of the conventional kiln with the daily yield being more than 600 tons and even the daily yield being more than thousands of tons.
Description
Technical field
The present invention relates to lumpy material roasting kiln field, particularly a kind of Sleeve type double-hearth shaft kiln.
Background technology
General shaft furnace is along with the increase of output, its geometrical dimension should increase according to a certain percentage, with regard to MAERZ lime kiln, high-temperature gas due to roasting band is directly vented or air inlet by periphery, this makes high-temperature gas in the process flowed downward or upwards flow, away from roasting band lower central position, this position heat supply deficiency is caused to produce underburnt, the larger phenomenon of equivalent diameter of kiln is more obvious, in order to compensate this defect, roasting band height can only be increased, the kiln height of therefore existing shaft furnace is relevant with kiln thorax cross section diameter size, shaft furnace specification generally need keep aspect ratio constant.
Like this; the problem brought is that the too high drag losses of kiln body is large, the calorie distribution inequality of center and periphery, material roasting time is long affects quality product; along with the installation difficulty of the cantilevered spray gun of the increase of kiln thorax diameter and spray gun protective guard is also very large, hinders shaft furnace and keep the large-scale development.
Summary of the invention
The object of this invention is to provide a kind of Sleeve type double-hearth shaft kiln, overcome the deficiencies in the prior art, optimize the distributed architecture of material in kiln thorax, improve the calorie distribution uneven phenomenon in roasting process, the height of shaft furnace is not changed with the specifications vary of kiln, and shaft furnace is kept the large-scale development becomes possibility.
For achieving the above object, the present invention is achieved through the following technical solutions:
Sleeve type double-hearth shaft kiln, comprise two symmetrical kiln thoraxes and Fuel lance, preheating zone, roasting band and cooling zone is respectively from top to bottom in kiln thorax, two kiln thoraxes are connected by connecting passage with the junction of cooling zone at calcining zone, Fuel lance outlet is arranged in the cross section of kiln thorax, described Liang Geyaotang center is respectively equipped with inner sleeve, inner sleeve lower end is fixed on the drawing mechanism bottom kiln thorax, axial location card above inner sleeve upper end and kiln thorax is hinged, the termination of axial location card and kiln thorax housing hinge; The top of kiln thorax is provided with annular distributor, above the inner sleeve of the below of annular distributor, be provided with tripper;
Described inner sleeve is steel structure body from bottom to top; the protective sleeve having refractory materials is built in the outside of inner sleeve; the inside of inner sleeve is air passageways; inner sleeve and kiln thorax inwall form annular section; the specification size of shaft furnace is only relevant with annular section region area size, and the height of kiln body preheating zone and roasting band etc. does not change with the specifications vary of kiln substantially.
Be provided with multiple stage discharging machine in described drawing mechanism, below drawing mechanism, be provided with discharge bucket.
What pass in the air passageways of described inner sleeve inside is combustion air or cooling air.
Described Fuel lance is according to the annular section shape of kiln thorax, and from inside to outside by more than two rings or two rings evenly distributed layout, the protective guard of Fuel lance is fixed on kiln shell and/or inner sleeve.
Convex-concave structure is adopted mutually to be interlocked between brick body on the protective sleeve of described inner sleeve.
In described connecting passage, space mounting has interchanger.
Compared with prior art, the invention has the beneficial effects as follows: optimize the distributed architecture of material in kiln thorax, kiln body drag losses is little, the calorie distribution of Yao Tang center and periphery is even, improve the calorie distribution uneven phenomenon in roasting process, good product quality, be conducive to saves energy, the height of shaft furnace is not changed with the specifications vary of kiln, convenient installation Fuel lance and protective guard, solve lime, rhombspar MAERZ lime kiln maximization problem, be applicable to newly-built, reconstruction, enlarging, specification is that daily output is greater than more than 600 tons, or even in more than daily output kiloton technological design.
Accompanying drawing explanation
Fig. 1 is embodiment of the present invention section structure schematic diagram;
Fig. 2 is embodiment of the present invention two dimensional structure schematic diagram;
Fig. 3 is inner sleeve protective sleeve embodiment brick body interlocking pattern section structure schematic diagram of the present invention;
Fig. 4 is inner sleeve protective sleeve embodiment brick body interlocking pattern two dimensional structure schematic diagram of the present invention.
In figure: 1-kiln thorax 2-Fuel lance 3-connecting passage 4-inner sleeve 5-drawing mechanism 6-axial location card 7-annular distributor 8-tripper 9-protective sleeve 10-discharge bucket 11-shaft furnace FRAME FOUNDATION 12-brick body 13-anchoring piece 14-insulating lining
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in further detail.
See Fig. 1, Fig. 2, it is Sleeve type double-hearth shaft kiln example structure schematic diagram of the present invention, comprise two symmetrical kiln thoraxes 1 and Fuel lance 2, preheating zone is respectively from top to bottom in kiln thorax 1, roasting band and cooling zone, two kiln thoraxes 1 are connected by connecting passage 3 with the junction of cooling zone at calcining zone, Fuel lance 2 outlet is arranged in the cross section of kiln thorax 1, two kiln thorax 1 centers are respectively equipped with inner sleeve 4, inner sleeve 4 lower end is fixed on the drawing mechanism 5 bottom kiln thorax, axial location card 6 above inner sleeve 4 upper end and kiln thorax is hinged, the termination of axial location card 6 and kiln thorax 1 housing hinge, the top of kiln thorax 1 is provided with annular distributor 7, above the inner sleeve 4 of the below of annular distributor 7, be provided with tripper 8,
Inner sleeve 4 is steel structure body from bottom to top, and build the protective sleeve 9 having refractory materials in the outside of inner sleeve 4, the inside of inner sleeve 4 is air passagewayss, and inner sleeve 4 and kiln thorax 1 inwall form annular section, and material completes preheating, roasting, cooling in annular section region; Combustion air and waste gas individually commutate.
The virtual height substantially constant of shaft furnace, specification size is only with annular region area change, namely the specification size of shaft furnace is only relevant with annular region size, the height of kiln body preheating zone and roasting band etc. does not substantially change this feature and only has the shaft furnace of band inner sleeve just to have with the specifications vary of kiln, therefore fluid resistance is little.Be provided with the fan-shaped discharging machine of multiple stage in drawing mechanism 5, be provided with discharge bucket 10 below drawing mechanism 5, drawing mechanism is by integral hoisting in shaft furnace FRAME FOUNDATION 11, and this device while material, also carries the load of inner sleeve 4 and protective sleeve 9 in carrying kiln.Can need to pass into combustion air or cooling air according to technique in the air passageways of inner sleeve 4 inside.
Fuel lance 2 is according to the annular section shape of kiln thorax; from inside to outside by more than two rings or two rings evenly distributed layout; the problems such as the protective guard of Fuel lance 2 is fixed on kiln shell and/or inner sleeve, solves large-scale shaft furnace spray gun protective guard single-cantilever oversize, insecure.
See that the protective sleeve of Fig. 3, Fig. 4 inner sleeve is made up of brick body 12, anchoring piece 13 and insulating lining 14; convex-concave structure is adopted mutually to be interlocked between brick body 12 on protective sleeve; by anchoring piece 13, brick body 12 and insulating lining 14 are connected together; and be welded into as a whole with inner sleeve 4 outer wall, to guarantee the normal work of protective sleeve 9 and to increase the service life.
Enough spacious in connecting passage 3 space, can mounting heat exchanger, waste gas is declined or rises evenly, heat smoke is bias current not easily, and connecting passage top all adopts cast structure, easy construction and good airproof performance, solve large-scale shaft furnace exhaust steam passage wide, the large problem of difficulty is built at top by laying bricks or stones.
During production, two kiln thoraxes being provided with inner sleeve, reach alternately heating by reversing system, exchange the function of a kiln thorax at regular intervals, and namely a kiln thorax every one-period heating once.During production, the tripper of the distributor of block from a kiln thorax top again through this kiln thorax top is sent in annular region to need the Wingdale of the load weighted release mesh of calcining or rhombspar (hereinafter referred to as raw material) to expect, in calcination process, during heat supply, fuel is sent into by another kiln thorax top, by burying Fuel lance in the feed, be distributed on the ring kiln thorax section of bottom, preheating zone with making uniform fuel, combustion air Root's blower sends into kiln inner top bottom the inner sleeve of this kiln thorax, the combustion air passing into two kiln thoraxes adopts commutation valve plate to control, according to the needs of each commutation cycle, combustion air or cooling air is passed into calcining thorax, preheating thorax then cools its inner sleeve with the inner sleeve cooling blower arranged separately, to extend the work-ing life of inner sleeve.After preheating zone and raw material heat exchange obtain high temperature, enter calcining zone and fuel mix afterfire heat release and make raw material obtain fast decoupled, now, the high-temperature flue gas produced in calcining kiln thorax and raw material annularly section all flow downward, this and stream heating, can make the hottest flame and contact raw and complete calcining.And stream heating reaches very high rate of heat exchange when enabling calcining zone start does not make finished product burning.Air-flow (waste gas) through calcining zone converges with the cooling air from cooling zone, enter calcining zone, the preheating zone of this kiln thorax together with the cooling air of another kiln thorax (preheating thorax) after communicating passage spacious between two kiln thoraxes, with the material counter-current flow in this kiln thorax, a large amount of heat exchanges is carried out in preheating zone and raw material, discharge equably from the top of this kiln thorax after waste gas is cooled to lower temperature, after dedusting, enter air by induced-draft fan.The finished product calcined enters cooling zone and cools.Cooling air feeds from the bottom of two kiln thoraxes simultaneously, and carry out counterflow heat exchange with the material in cooling zone annular section region, the finished product cooled is drawn off by the drawing mechanism at the bottom of kiln.
The present invention is applicable to the differential larger Wingdale of granularity or rhombspar raw material, also can use solid fuel, the geseous fuel of liquid fuel and various calorific value.When using geseous fuel, needing the safe operating device configuring geseous fuel necessity, there is very wide application prospect.
Claims (6)
1. Sleeve type double-hearth shaft kiln, comprise two symmetrical kiln thoraxes and Fuel lance, preheating zone, roasting band and cooling zone is respectively from top to bottom in kiln thorax, two kiln thoraxes are connected by connecting passage with the junction of cooling zone at calcining zone, Fuel lance outlet is arranged in the cross section of kiln thorax, it is characterized in that, described Liang Geyaotang center is respectively equipped with inner sleeve, inner sleeve lower end is fixed on the drawing mechanism bottom kiln thorax, axial location card above inner sleeve upper end and kiln thorax is hinged, the termination of axial location card and kiln thorax housing hinge; The top of kiln thorax is provided with annular distributor, above the inner sleeve of the below of annular distributor, be provided with tripper;
Described inner sleeve is steel structure body from bottom to top; the protective sleeve having refractory materials is built in the outside of inner sleeve; the inside of inner sleeve is air passageways; inner sleeve and kiln thorax inwall form annular section; the specification size of shaft furnace is only relevant with annular section region area size, and the height of kiln body preheating zone and roasting band does not change with the specifications vary of kiln substantially.
2. Sleeve type double-hearth shaft kiln according to claim 1, is characterized in that, is provided with multiple stage discharging machine, is provided with discharge bucket below drawing mechanism in described drawing mechanism.
3. Sleeve type double-hearth shaft kiln according to claim 1, is characterized in that, what pass in the air passageways of described inner sleeve inside is combustion air or cooling air.
4. Sleeve type double-hearth shaft kiln according to claim 1; it is characterized in that; described Fuel lance is according to the annular section shape of kiln thorax, and from inside to outside by more than two rings or two rings evenly distributed layout, the protective guard of Fuel lance is fixed on kiln shell and/or inner sleeve.
5. Sleeve type double-hearth shaft kiln according to claim 1, is characterized in that, adopts convex-concave structure to be mutually interlocked between the brick body on the protective sleeve of described inner sleeve.
6. Sleeve type double-hearth shaft kiln according to claim 1, is characterized in that, in described connecting passage, space mounting has interchanger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310579594.1A CN103601376B (en) | 2013-11-18 | 2013-11-18 | Sleeve type double-hearth shaft kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310579594.1A CN103601376B (en) | 2013-11-18 | 2013-11-18 | Sleeve type double-hearth shaft kiln |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103601376A CN103601376A (en) | 2014-02-26 |
| CN103601376B true CN103601376B (en) | 2015-04-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310579594.1A Active CN103601376B (en) | 2013-11-18 | 2013-11-18 | Sleeve type double-hearth shaft kiln |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104211309B (en) * | 2014-09-05 | 2016-02-10 | 石家庄新华能源环保科技股份有限公司 | A kind of suspension cylinder formula also flows the two thorax kiln of accumulation of heat |
| CN108996927B (en) * | 2018-07-29 | 2020-08-04 | 中冶南方武汉钢铁设计研究院有限公司 | Double-chamber shaft kiln with cooling support upright post |
| CN109437608B (en) * | 2018-11-09 | 2021-06-15 | 余松涛 | Double-path air built-in heat exchanger lime shaft kiln and calcining method thereof |
| CN109579508A (en) * | 2018-11-28 | 2019-04-05 | 东北大学 | A kind of internal passage type energy-saving high yield type reheating magnesia shaft furnace |
| CN114166012A (en) * | 2021-12-29 | 2022-03-11 | 中冶焦耐(大连)工程技术有限公司 | Central structure of high-yield shaft kiln |
| CN114671632A (en) * | 2022-04-25 | 2022-06-28 | 中冶焦耐(大连)工程技术有限公司 | Bidirectional roasting double-hearth shaft kiln and roasting method |
| CN116535113B (en) * | 2023-05-23 | 2024-08-20 | 广西柳钢新材料科技有限公司 | Method for preventing dust deposition in middle channel of double-chamber kiln |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102557492A (en) * | 2012-01-06 | 2012-07-11 | 石家庄市新华工业炉有限公司 | Heat accumulating type double-hearth lime kiln |
| CN203033894U (en) * | 2012-12-31 | 2013-07-03 | 广东韶钢松山股份有限公司 | Parallel flow heat storage double chamber kiln support arch structure |
| CN203568975U (en) * | 2013-11-18 | 2014-04-30 | 中冶焦耐工程技术有限公司 | Sleeve-type double-hearth shaft kiln |
| EP2199718B1 (en) * | 2008-12-09 | 2015-01-28 | Cimprogetti S.p.A. | Lime kiln |
-
2013
- 2013-11-18 CN CN201310579594.1A patent/CN103601376B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2199718B1 (en) * | 2008-12-09 | 2015-01-28 | Cimprogetti S.p.A. | Lime kiln |
| CN102557492A (en) * | 2012-01-06 | 2012-07-11 | 石家庄市新华工业炉有限公司 | Heat accumulating type double-hearth lime kiln |
| CN203033894U (en) * | 2012-12-31 | 2013-07-03 | 广东韶钢松山股份有限公司 | Parallel flow heat storage double chamber kiln support arch structure |
| CN203568975U (en) * | 2013-11-18 | 2014-04-30 | 中冶焦耐工程技术有限公司 | Sleeve-type double-hearth shaft kiln |
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| CN103601376A (en) | 2014-02-26 |
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Effective date of registration: 20180725 Address after: 116085 128 high energy street, Qixian Ling high tech Industrial Park, Dalian, Liaoning Patentee after: ACRE COKING & REFRACTORY ENGINEERING CONSULTING CORPORATION (DALIAN), MCC Address before: 116085 128 high energy street, Qixian Ling high tech Industrial Park, Dalian, Liaoning Patentee before: ACRE COKING & REFRACTORY ENGINEERING CONSULTING CORPORATION, MCC |
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Denomination of invention: Sleeve type double bore shaft kiln Effective date of registration: 20211203 Granted publication date: 20150415 Pledgee: Dalian Branch of Bank of Communications Co.,Ltd. Pledgor: ACRE COKING & REFRACTORY ENGINEERING CONSULTING CORPORATION (DALIAN), MCC Registration number: Y2021210000090 |
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Granted publication date: 20150415 Pledgee: Dalian Branch of Bank of Communications Co.,Ltd. Pledgor: ACRE COKING & REFRACTORY ENGINEERING CONSULTING CORPORATION (DALIAN), MCC Registration number: Y2021210000090 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right |