CN206751666U - Annular lime shaft kiln - Google Patents
Annular lime shaft kiln Download PDFInfo
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- CN206751666U CN206751666U CN201720544143.8U CN201720544143U CN206751666U CN 206751666 U CN206751666 U CN 206751666U CN 201720544143 U CN201720544143 U CN 201720544143U CN 206751666 U CN206751666 U CN 206751666U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P40/00—Technologies relating to the processing of minerals
- Y02P40/40—Production or processing of lime, e.g. limestone regeneration of lime in pulp and sugar mills
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Abstract
The utility model provides a kind of annular lime shaft kiln, including kiln body, distributing device, multiple upper lower combustion chamber, multiple burners up and down, multiple arch bridge, cooling air systems etc. up and down, wherein kiln body has arranged concentric and interval inner cylinder and outer barrel formed with circular passage, and distributing device is located at the upper end of circular passage；Cooling air system includes inner cylinder cooling air system and bed of material cooling air system, inner cylinder cooling air system is arranged so that cool down wind flows out for cooling down inner cylinder and being passed through upper burner as its combustion air from the inflow of the bottom of inner cylinder, top, and bed of material cooling air system is arranged so that cooling down wind is cooled down to the bed of material after being calcined in circular passage and provide combustion air for lower burner；Its annular passage is configured to preheating zone, top adverse current burning zone, middle part adverse current burning zone, bottom without the quenched band of stream and cooling zone from top to bottom.It is small that the utility model can stably produce the active lime of high quality, combustion gas strong adaptability, environmental pollution.
Description
Technical field：
A kind of Industrial Stoves of calcined limestone are the utility model is related to, more particularly to a kind of annular lime shaft kiln.
Background technology：
Currently used for the shaft furnace of lime burning, mainly including annular lime kiln, double thorax kilns, twin beams kiln and mechanized cement shaft kiln
Deng.
The common feature of double thorax kilns, twin beams kiln and mechanized cement shaft kiln is：There is no independent combustion space, the burning of fuel exists
Carried out in the bed of material.This combustion system further has influence on：First, in order to cause fuel to be burnt in the bed of material fully as far as possible,
Larger coefficient of excess air must be used, causes the increase of meaningless combustion product, correspondingly increases the meaningless heat consumption of system；
Second, the combination order of primary air, auxiliary air and fuel in the bed of material is poor, in order to reach the lime stone of burning zone point
Necessary temp needed for solution, it is desirable to which the calorific value of fuel is higher；3rd, or when fuel is relatively low, due to primary air, secondary sky
The combination order of gas and fuel in the bed of material is poor, and burning zone ignition temperature is relatively low, must in order to reach the degree of calcination of requirement
Must increase material in the residence time of burning zone, that is, meaning the calcination space usage factor of kiln reduces, and is unable to reach design production
Amount.
Maximum of the annular lime kiln in burning is characterized in：It is provided with upper and lower two layers independent combustion space；In lower burning
Room, at least two kinds of combustion airs participate in burning：Lime cooling air and driving air, supplement burner combustion air if necessary,
The angle of collateral security basic technology, even if only lime cooling air and driving air participates in burning, lower combustion chamber has reached very
High coefficient of excess air；In upper combustion chamber, normally only burner combustion air participates in burning, from the angle of control ignition temperature,
Oxygen debt burning is generally in upper combustion chamber, remaining unburned fuel rises oxygen unnecessary in flue gas with lower combustion chamber and combined, and
Continue the bed of material burning near upper combustion chamber.So：For exotic fuels, fuel burns degree pole in upper combustion chamber
Low, calorific value is higher, and the degree that burns is lower, and certainly will so having substantial amounts of fuel to enter upper combustion chamber, nearby the bed of material burns away, as before
Described, the mode of burning can not ensure fully burning for fuel in the bed of material.For low calorie fuels, on the one hand, due to lower burning
Room very high coefficient of excess air in itself, the flue-gas temperature after burning be difficult to reach material decompose needed for temperature；On the other hand,
The preferable ignition temperature of upper combustion chamber certainly will be realized by improving air coefficient in upper combustion chamber, although now in upper combustion chamber
Fuel burns degree raising, but the air coefficient of whole sleeve kiln will become high.
In a word, for the shaft furnace currently used for lime burning, problem be present includes：
First, fuel value requires higher, double thorax kilns, twin beams kiln and mechanized cement shaft kiln typically require 6690kJ/Nm3 with
On, annular lime kiln is typically required in 5020kJ/Nm3More than.
Second, or when fuel value is relatively low, production operation must drop in kiln, while the raw burn rate of material will substantially increase.
3rd, the air coefficient of double thorax kilns, twin beams kiln and mechanized cement shaft kiln is higher, and double thorax kilns, twin beams kiln and mechanization are stood
Kiln is typically more than 1.4, it is meant that meaningless heat consumption is higher.
4th, for sleeve kiln：When taking exotic fuels, air coefficient is relatively low, but the burnout rate drop of fuel simultaneously
It is low；When taking low calorie fuels, air coefficient is higher.The problem of meaningless heat consumption is high in a word be present.
Utility model content：
To overcome above mentioned problem, the utility model provides a kind of active lime that can stably produce high quality and combustion
The small annular lime shaft kiln of gas strong adaptability, environmental pollution will be favourable.
Therefore, the utility model provides a kind of annular lime shaft kiln, it includes：
Kiln body, it has the inner cylinder and outer barrel of arranged concentric, formed with circular passage between inner cylinder and outer barrel；
Distributing device, it is installed in circular passage upper end；
Multiple upper combustion chamber and multiple lower combustion chamber, its excircle along outer barrel are spaced apart up and down；
Multiple upper burners and multiple lower burners, it is installed in multiple upper combustion chamber and multiple lower burnings respectively correspondingly
On room；
Multiple upper arch bridges and multiple lower arch bridges, it is used for correspondingly by multiple upper burnings between outer barrel and inner cylinder
Room and multiple lower combustion chamber are connected with inner cylinder respectively；
Inner cylinder cooling air system, it includes inner cylinder cooling wind inlet pipe and corresponded on inner cylinder with multiple upper burners
Multiple inner cylinder cooling air outlets, and be arranged so as to cool down wind flowed into from the bottom of inner cylinder, top outflow；
Bed of material cooling air system, it includes bed of material cooling wind inlet pipe and corresponded on outer barrel with multiple lower burners
Multiple bed of material cooling air outlets, and be arranged so that cool down wind in circular passage calcine after the bed of material cool down；
Wherein, preheating zone between above-mentioned circular passage is configured at the top of distributing device and inner cylinder from top to bottom, it is located at
Top adverse current burning zone at the top of inner cylinder between multiple upper combustion chamber, between multiple upper combustion chamber and multiple lower combustion chamber
Middle part adverse current burning zone, the bottom between multiple lower combustion chamber and multiple bed of material cooling air outlets without flow quenched band, with
And the cooling zone below multiple bed of material cooling air outlets.
In the utility model, due to can be completed simultaneously in the space of circular passage adverse current calcining and without flow it is quenched, because
This can stably produce the active lime of high quality；
Due to eliminating the labyrinths such as heat exchanger of the prior art, injector, and add without flowing quenched band, so as to
So that burning of the fuel in combustion chamber is more easy to control, thus it is stronger to the adaptability of combustion gas, and reduce investment cost and drop
Low equipment failure rate；Due to the setting of inner cylinder cooling air system and bed of material cooling air system so that exhaust gas temperature is relatively low, thus
Cold wind need not be blended into when flue gas is discharged into air advance deduster, this aspect reduces power consumption, on the other hand can reduce and remove
Filtration velocity in dirt device, further extend the service life of cloth bag and ensure efficiency of dust collection.
Further, above-mentioned inner cylinder cooling air system also includes at least one inner cylinder cooling blower, multiple inner cylinders cooling wind branch
Pipe and an inner cylinder cooling vane pipe, wherein, inner cylinder cooling blower and above-mentioned inner cylinder cooling wind inlet pipe are connected, and be used for will be cold
But wind is sent into above-mentioned inner cylinder, and one end of multiple inner cylinder cooling wind branch pipes is connected to above-mentioned multiple inner cylinder cooling wind correspondingly
Outlet, the other end are all communicated on inner cylinder cooling vane pipe, and the inner cylinder cooling vane pipe connects with above-mentioned multiple upper burners to be thought
It provides combustion air.
Due to said structure so that own temperature is preheated into 200 DEG C or so of cooling wind again while inner cylinder is cooled down
Go to participate in the combustion-supporting of burner, so take full advantage of waste heat, reduce energy consumption.
Further, above-mentioned multiple bed of material cooling air outlets are connected to multiple bed of material cooling air outlet branch correspondingly
Pipe, above-mentioned bed of material cooling air system also include multiple bed of material cooling blowers, and the plurality of bed of material cooling blower and the plurality of bed of material are cold
But wind outlet stool corresponds and is used to the cooling wind after heat exchange in above-mentioned cooling zone being drawn into multiple bed of material cooling wind
In outlet stool, the plurality of bed of material cooling air outlet branch pipe connects with above-mentioned multiple lower burners helped with being provided for it correspondingly
Fire air.
Set by said structure, temperature improves to 400 DEG C or so, so after cooling wind can carry out heat exchange with calcine
Afterwards wind extraction will be cooled down by bed of material cooling blower after preheating and be used as the combustion air of lower burner, and calcine is passed through
Temperature can be reduced to 100 DEG C or so after cooling down the cooling of wind, so take full advantage of waste heat, reduce energy consumption.
Further, in addition to for the main smoke discharging blower fan system from the outside drawing smoke in above-mentioned preheating zone, the main smoke evacuation
Blower fan system includes flue gas pump orifice at the top of the above-mentioned outer barrel, is connected with flue gas pump orifice smoke settlement pipe and with
The main smoke discharging blower fan of smoke settlement pipe connection, wherein, on main smoke discharging blower fan and above-mentioned multiple bed of material cooling blowers are arranged so that
The negative pressure stated in multiple lower combustion chamber is consistent with the negative pressure at above-mentioned multiple bed of material cooling air outlets, so that in above-mentioned bottom without stream
Airless flows in quenched band.
Due to said structure, higher lime stone continues downwards to bottom degree of calcination after the adverse current burning zone of middle part
During without flowing quenched band, although continuing heat supply to it without flue gas, by material contained heat in itself, continuing as material and entering
Row relaxes decomposition and quenched creation time and steric requirements, so as to stably produce the active lime of high quality.
Again further, above-mentioned multiple upper combustion chamber and above-mentioned multiple lower combustion chamber are arranged to combustion gas and above-mentioned combustion air
Fully burning in it.
By above-mentioned setting, may be such that fuel realizes completely burned in combustion chamber, the burnout rate of fuel greatly improves,
The waste of fuel will not be caused；Further, since cold air is participated in after the cooling to inner cylinder and the bed of material is completed by burner
The burning of combustion chamber, thus do not have to concern combustion chamber can because clean-burning high temperature and caused by combustion chamber and the resistance to material of arch bridge
Influence.
Again further, when above-mentioned combustion gas is blast furnace gas, excess air coefficient is controlled in 1.05-1.2.
By above-mentioned setting, it may be such that blast furnace gas and air fully burn in combustion chamber, certainly, excess air coefficient
It is slightly different according to the calorific value of combustion gas, i.e. the control of excess air coefficient can be carried out slightly according to the species for the combustion gas for participating in burning
Change, to ensure clean-burning effect.
Further, above-mentioned multiple upper combustion chamber and above-mentioned multiple lower combustion chamber use fuel/air mixture fractional combustion mode,
And/or above-mentioned multiple upper burners and above-mentioned multiple lower burners all use low NOx burner.
Said structure can greatly reduce NOx emission index.For example, when using low NOx burner, in combustion chamber
Local smoke backflow area can be formed, reduces the oxygen concentration of combustion space, and creates NOx reducing condition, so as to inhibit
Thermal NO x generation, therefore, the discharge that the utility model is capable of strict guarantee NOx are far below 100mg/Nm3（With NO2Meter）.
Further, in addition to ash discharge platform and multiple ash hoists on ash discharge platform, the above-mentioned bed of material cool down wind inlet
Pipe is arranged at ash discharge mesa base and is sucked outside air in above-mentioned kiln body using the negative pressure in above-mentioned kiln body.
Further, in addition to multiple cutting plates above the above-mentioned ash hoist, wherein, above-mentioned multiple upper arch bridges with it is above-mentioned
It is dislocation arrangement between multiple lower arch bridges, between above-mentioned multiple lower arch bridges and above-mentioned multiple cutting plates.
Arranged by misplacing so that during material moves from top to down in circular passage, repeatedly at a certain angle
Lateral reallocation, that is, carry out secondary material distributing, material is more evenly distributed, improve material degree of being heated evenly.
Further, for same seat ring shape lime shaft kiln, above-mentioned multiple quantity is the same numeral more than or equal to 4,
It is and all evenly distributed in the circumferential direction.
By multiple upper combustion chamber on annular lime shaft kiln of the present utility model, multiple lower combustion chamber, multiple upper burners,
Multiple lower burners, multiple upper arch bridges, multiple lower arch bridges, multiple inner cylinder cooling air outlets, multiple bed of material cooling air outlets, it is multiple go out
Grey machine, multiple cutting plates, etc. so that either cloth, flue gas or cooling wind can be distributed in a circumferential direction
It is even.
By reference to the embodiments described below, above-mentioned these and other aspects of the present utility model will obtain
More clearly illustrate.
Brief description of the drawings：
The structure of utility model and further objects and advantages will be obtained more preferably by description below in conjunction with the accompanying drawings
Ground understanding, wherein, identical reference marker mark identical element：
Fig. 1 is the structural representation according to the annular lime shaft kiln of an embodiment of the present utility model.
Description of reference numerals：
The inner cylinder of 1 kiln body 10
The circular passage of 12 outer barrel 2
The top adverse current burning zone of 21 preheating zone 23
The bottom of 25 middle part adverse current burning zone 27 is without the quenched band of stream
The distributing device of 28 cooling zone 3
Burner in 40 upper combustion chamber 41
42 burners of lower combustion chamber 43 times
52 times arch bridges of arch bridge on 50
The inner cylinder cooling air outlet of 60 inner cylinders cooling wind inlet pipe 62
The inner cylinder cooling vane pipe of 64 inner cylinders cooling wind branch pipe 66
The bed of material cooling air outlet of 70 bed of materials cooling wind inlet pipe 72
The bed of material cooling blower of 74 bed of material cooling air outlet branch pipe 76
The ash hoist of 8 ash discharge platform 81
Embodiment：
Specific embodiment of the present utility model is described below in conjunction with accompanying drawing.
Fig. 1 shows the annular lime shaft kiln according to an embodiment of the present utility model.In present embodiment
In, annular lime shaft kiln includes kiln body, distributing device, combustion chamber, burner, arch bridge, cooling air system etc., wherein, kiln body 1 has same
The inner cylinder 10 and outer barrel 12 of heart arrangement, formed with circular passage 2 between inner cylinder 10 and outer barrel 12；Distributing device 3 is installed in annular
The upper end of passage 2；Combustion chamber includes 9 upper combustion chamber 40 and 9 lower combustion chamber 42, upper combustion chamber 40 and lower combustion chamber 42 along outer
The excircle of cylinder 2 is spaced apart up and down, and 9 upper combustion chamber 40 are uniformly distributed in a circumferential direction, 9 lower combustion chamber 42
It is uniformly distributed in a circumferential direction；Burner includes 9 upper burners 41 and 9 lower burners 43, and they are installed correspondingly respectively
In in 9 upper combustion chamber 40 and 9 lower combustion chamber 42；Arch bridge includes 9 upper arch bridges 50 and 9 lower arch bridges 52, and they are positioned at outer
Between cylinder 12 and inner cylinder 10, for 9 upper combustion chamber 40 and 9 lower combustion chamber 42 to be connected with inner cylinder 10 respectively correspondingly
Connect.
It should be noted that although the structure such as upper combustion chamber, lower combustion chamber is all 9 in the present embodiment, and unexpectedly
Taste that the numeral is immutable, in fact, the quantity of these structures is come fixed according to the yield of annular lime shaft kiln, for example,
When yield is of a relatively high, the quantity of these structures can be designed as 9, and yield is slightly lower, it can also be provided that 7,5
Deng.
Again as shown in figure 1, in the present embodiment, annular lime shaft kiln also includes inner cylinder cooling air system, wherein, this is interior
Cylinder cooling air system includes inner cylinder cooling blower（It is not shown）, be connected with inner cylinder cooling blower inner cylinder cooling wind inlet pipe 60,
9 inner cylinder cooling air outlets 62 positioned at the top of inner cylinder 10, it is connected to correspondingly on 9 inner cylinder cooling air outlets 62
9 inner cylinder cooling wind branch pipes 64 and side connect the upper burner of above-mentioned 9 of opposite side connection of 9 inner cylinder cooling wind branch pipes 64
41 inner cylinder cooling vane pipe 66, inner cylinder cooling wind inlet pipe 60 and 9 inner cylinder cooling air outlets 62 are arranged so as to cool down wind
Flowed into from the bottom of inner cylinder 10, top outflow, inner cylinder cooling vane pipe 66 is communicated to 9 upper burners 41 and helped to be provided for upper burner
Fire air.
In the present embodiment shown in Fig. 1, annular lime shaft kiln also includes being arranged so as to cool down wind to circular passage 2
The bed of material cooling air system that the bed of material after interior calcining is cooled down, it includes bed of material cooling wind inlet pipe 70, on outer barrel 12
9 bed of material cooling air outlets 72,9 bed of materials cooling wind for being connected correspondingly with 9 bed of material cooling air outlets 72 goes out
Mouth branch pipe 74,9 bed of material cooling blowers 76 set with 9 one-to-one corresponding of bed of material cooling air outlet branch pipes 74, wherein, this 9
Individual bed of material cooling blower is used to the cooling wind for completing heat exchange in circular passage 3 being drawn into 9 bed of material cooling air outlets
In branch pipe 74,9 bed of material cooling air outlet branch pipes 74 connect with above-mentioned 9 lower burners 43 so as to be provided for it correspondingly
Combustion air.
Again as shown in figure 1, in the present embodiment, circular passage 2 includes preheating zone 21 from top to bottom, top adverse current is calcined
Band 23, middle part adverse current burning zone 25, bottom without flowing quenched band 27 and cooling zone 28, wherein, preheating zone 21 is formed at cloth
Between glassware 3 and the top of inner cylinder 10, top adverse current burning zone 23 is located between the top of inner cylinder 10 and upper combustion chamber 40, middle part adverse current
Burning zone 25 is between upper combustion chamber 40 and lower combustion chamber 42, and without flowing, quenched band 27 is located at lower combustion chamber 42 and the bed of material is cold for bottom
But between wind outlet 72, cooling zone 28 is located at the lower section of bed of material cooling air outlet 72.
Although being not shown in Fig. 1, it should be noted that in the present embodiment, annular lime shaft kiln also includes being used for
From the main smoke discharging blower fan system of above-mentioned 21 outside drawing smoke of preheating zone, the main smoke discharging blower fan system includes being located at above-mentioned outer barrel top
Flue gas pump orifice, the smoke settlement pipe connected with flue gas pump orifice and the main Smoke connected with smoke settlement pipe in portion
Machine.It should be appreciated that in the present embodiment, main smoke discharging blower fan and above-mentioned 9 bed of material cooling blowers 76 are arranged so that 9
Negative pressure in lower combustion chamber 42 is consistent with the negative pressure at above-mentioned 9 bed of material cooling air outlets 72, so that in bottom without the quenched band of stream
Airless flows in 27.
It is further to note that in the present embodiment, inner cylinder 10 includes steel inner casing and the outer wall around inner cylinder 1 is built into
Refractory lining, outer barrel 12 also includes the refractory lining that is built into of outer steel shell and the inwall around outer barrel 12；Set in combustion chamber resistance to
Fiery liner, arch bridge is by refractory material laying.Annular lime shaft kiln calcining heat used is provided by burner, and fuel sprays through burner
Into combustion chamber, the space communicated with combustion chamber that high-temperature gas caused by burning is formed by arch bridge bottom enters the bed of material, is
Calcining in kiln body 1 provides heat.
Material is particularly in preheating zone 21, top adverse current burning zone 23, middle part adverse current burning zone in kiln body 1 below
25th, bottom is briefly described without the flow flowed in quenched band 27 and cooling zone 28：
Qualified lime stone loads in truck after scale hooper weighs, and truck is promoted to annular lime shaft kiln by hoist engine
Kiln top, the distributing device 3 that the lime stone in truck is added on kiln top, entered by distributing device 3 in kiln body 1.Then, material,
Be lime stone in present embodiment, by the preheating zone 21 in kiln body 1, top adverse current burning zone 23, middle part adverse current burning zone 25,
Bottom subsequently into kiln bottom feed bin, finally expels from kiln without quenched band 27 and cooling zone 28 is flowed, finished product warehousing is delivered to by conveyer
Deposit.
The combustion product gases of lower combustion chamber 42 flow up into middle part adverse current burning zone due to the suction of main smoke discharging blower fan
25, and enter top adverse current burning zone 23 together with the combustion product gases of upper combustion chamber 40 are after mixing near upper arch bridge 50.Due to
In the two burning zones, the traffic direction of combustion-gas flow direction and material is on the contrary, so referred to as adverse current burning zone.
When material flows downward to middle part adverse current 25 bottom of burning zone, degree of calcination is higher（For 70%-90% or so）.
Continue downwards to bottom without quenched band 27 is flowed when, it is contained in itself by material although continuing heat supply to it without flue gas
Heat, continue as material and carry out relaxing decomposition and quenched creation time and steric requirements, so as to produce active lime.
The high-temperature flue gas that upper combustion chamber 40, lower combustion chamber 42 burn flows through the bed of material and provides heat for the decomposition of lime stone
Afterwards, flowed up in the presence of main smoke discharging blower fan, fully enter preheating zone 21, and heat is carried out with the lime stone in preheating zone 21
Exchange, the flue-gas temperature for reaching the top of kiln body 1 is 90-120 DEG C.The flue gas at the top of preheating zone 21 is uniform via flue gas pump orifice
It is drawn into the stepping of going forward side by side of smoke settlement pipe and enters main smoke discharging blower fan.
Bed of material cooling air outlet is cooling zone 28 below 72 in circular passage 2.The annular lime shaft kiln of present embodiment
Also include ash discharge platform 8 and the ash hoist 81 on ash discharge platform, in the bottom of ash discharge platform 8, set 1 it is self-priming above-mentioned
Bed of material cooling wind inlet pipe 70, using the negative pressure of kiln body 1 by outside air（Referred to as cool down wind）It is drawn into kiln bottom feed bin（Figure is not
Show）It is interior, and flow through ash hoist 8 and enter cooling zone 28.Temperature is improved to 400 DEG C of left sides after cooling wind carries out heat exchange with calcine
It is right.
In bottom without flowing in quenched band 27, each bed of material cooling air outlet 72 by 1 VFC bed of material cooling blower
76 suctions, the cooling wind after preheating are extracted out, the combustion air as lower burner 43.The lime that calcining is completed passes through cooling zone 28
Temperature afterwards is reduced to 100 DEG C or so, and entering kiln bottom feed bin by ash hoist 81 stores.
The combustion gas in a lower kiln 1 and combustion air situation is described below:
Come from coal gas platform（It is not shown）Coal gas enter upper and lower totally 18 burners.Upper burner 41, lower burner 43 supply
Fuel quantity be different, allotment ratio is about：Up/down=1/1.8.The combustion air of upper burner 41 comes from inner cylinder 10
Wind is cooled down, the surrounding air of specifically inner cylinder cooling blower bulging enters inner cylinder 10, while cooling to inner cylinder steel sheel,
Own temperature is preheated to 200 DEG C or so, is then discharged from 9 inner cylinder cooling air outlets 62 at the top of inner cylinder, and cooled down through inner cylinder
After wind branch pipe 64, inner cylinder cooling vane pipe 66 are collected, most of combustion air branch pipe for entering 9 upper burners 41（It is not shown）,
Combustion air as upper combustion chamber 40.The unnecessary cooling wind of fraction then passes through the exhaust stack on inner cylinder cooling vane pipe 66
（It is not shown）It is discharged into atmospheric environment.
In upper combustion chamber 40, combustion gas is clean-burning with air, and excess air coefficient slightly has according to the calorific value of combustion gas
Difference, when using blast furnace gas, the excess air coefficient of present embodiment is controlled 1.2.
The combustion air of lower burner 42 comes from the cooling wind after cool lime.As it was previously stated, 9 independently control to adjust
Bed of material cooling blower 76 extracts the cooling wind after the preheating of cooling zone 28 out, the combustion air as lower burner 42.In lower burning
In room 42, combustion gas is also clean-burning with air, and excess air coefficient is slightly different according to the calorific value of combustion gas, when using blast furnace
During coal gas, the coefficient of excess air of present embodiment is also controlled 1.2.
Compared to prior art, the utility model has the following technical effect that：
1）Annular lime shaft kiln can be completed in same annular space adverse current calcining and without flow it is quenched, therefore can stably
Produce the active lime of high quality in ground；
2）Combustion gas strong adaptability, minimum calorific value can be used as 3000 kJ/Nm3Blast furnace gas, can also use high heating value
Height turn the solid fuels such as the gaseous fuels such as mixed gas, coal gas of converter, coke-stove gas, natural gas and coal, can also adopt if necessary
With bottle coal double fuel multifuel combustion；
3）Energy consumption is relatively low：Combustion gas and air are carried out only by respective temperature control needs in upper combustion chamber and lower combustion chamber
Simultaneously completely burned, combustion gas burnout rate are high for vertical regulation；Also, the waste heats such as inner cylinder cooling wind, bed of material cooling wind have obtained abundant profit
With；
4）For kiln exhaust gas after bag-type dust, the discharge of exhaust gas particle thing can reach≤10mg/Nm3, there is the good feature of environmental protection
Energy；Especially, annular lime shaft kiln due to exhaust gas temperature it is low, its flue gas, which enters before deduster, need not be blended into cold wind, on the one hand reduce
Power consumption, on the other hand, the filtration velocity in deduster can be reduced, further extend the service life of cloth bag and guarantee removes
Dirt efficiency；
6）Extremely low NOx emission index：First, upper combustion chamber and lower combustion chamber use fuel/air mixture fractional combustion side
Formula；Secondly, using low NOx burner, local smoke backflow area is formed in combustion chamber, reduces the oxygen concentration of combustion space, and
And create NOx reducing condition；Furthermore because of the presence in smoke backflow area, the Temperature Distribution in combustion chamber is relatively uniform, fire is reduced
Flame peak temperature, it is suppressed that thermal NO x generation.Therefore, kiln strict guarantee NOx discharge is far below 100mg/Nm3（With
NO2Meter）；
7）Kiln body equipment is simple, and equipment failure rate is low；
8）The production process that annular lime shaft kiln is under negative-pressure operation, reduces because firer makees to surrounding enviroment well
The pollution brought, the working environment of operating personnel is improved, be also convenient for equipment work shape of the operating personnel to bed rearrangement kiln system
The grasp of condition, inspection, the maintenance, repair work of equipment also facilitate, and operating personnel can have found to the potential event of normal production in time
Barrier, ensure that the quality of active lime；
9）Between cutting plate on annular lime shaft kiln between arch bridge and lower arch bridge, above lower arch bridge and ash hoist, it is
Dislocation arrangement so that into the material in kiln during moving downward, repeatedly lateral reallocation at a certain angle --- two
Secondary cloth, makes material be more evenly distributed, and improves material degree of being heated evenly.
Technology contents and technical characterstic of the present utility model have revealed that as above, it being understood, however, that of the present utility model
Under creative ideas, those skilled in the art can make various changes and improve to said structure, including individually disclose here
Or the combination of claimed technical characteristic, and significantly include other combinations of these features.These deformations and/or combination
Each fall within the technical field involved by the utility model, and fall into the protection domain of the utility model claims.
Claims (8)
- A kind of 1. annular lime shaft kiln, it is characterised in that including：Kiln body, it has the inner cylinder and outer barrel of arranged concentric, formed with circular passage between inner cylinder and outer barrel；Distributing device, it is installed in circular passage upper end；Multiple upper combustion chamber and multiple lower combustion chamber, its excircle along outer barrel are spaced apart up and down；Multigroup upper burner and multigroup lower burner, it is installed in multiple upper combustion chamber and multiple lower combustion chamber respectively correspondingly On；Multiple upper arch bridges and multiple lower arch bridges, it is between outer barrel and inner cylinder, for correspondingly by multiple upper combustion chamber It is connected respectively with inner cylinder with multiple lower combustion chamber；Inner cylinder cooling air system, it include inner cylinder cooling wind inlet pipe and on inner cylinder it is more correspondingly with multiple upper burners Individual inner cylinder cooling air outlet, and it is arranged so as to cool down wind from the inflow of the bottom of inner cylinder, top outflow；Bed of material cooling air system, it include the bed of material cooling wind inlet pipe and on outer barrel it is more correspondingly with multiple lower burners Individual bed of material cooling air outlet, and it is arranged so that cool down wind cools down to the bed of material after being calcined in circular passage；Wherein, preheating zone between the circular passage is configured at the top of distributing device and inner cylinder from top to bottom, positioned at inner cylinder Top adverse current burning zone between top and multiple upper combustion chamber, between multiple upper combustion chamber and multiple lower combustion chamber in Portion's adverse current burning zone, the bottom between multiple lower combustion chamber and multiple bed of material cooling air outlets are without the quenched band of stream, Yi Jiwei Cooling zone below multiple bed of material cooling air outlets.
- 2. annular lime shaft kiln according to claim 1, it is characterised in that the inner cylinder cooling air system is also included at least One inner cylinder cooling blower, a multiple inner cylinders cooling wind branch pipe and inner cylinder cooling vane pipe, wherein, inner cylinder cooling blower with The inner cylinder cooling wind inlet pipe is connected for cooling wind to be sent into the inner cylinder, one end one of multiple inner cylinder cooling wind branch pipes One is accordingly connected to the multiple inner cylinder cooling air outlet, and the other end is all communicated on inner cylinder cooling vane pipe, and the inner cylinder is cold But vane pipe is connected to provide combustion air for it with the multiple upper burner.
- 3. annular lime shaft kiln according to claim 1 or 2, it is characterised in that the multiple bed of material cooling air outlet one One is accordingly connected to multiple bed of material cooling air outlet branch pipes, and the bed of material cooling air system also includes multiple bed of materials cooling wind Machine, the plurality of bed of material cooling blower and the plurality of bed of material cooling air outlet branch pipe correspond and be used for will heat in the cooling zone Cooling wind after exchange is drawn into multiple bed of material cooling air outlet branch pipes, and the plurality of bed of material cooling air outlet branch pipe corresponds Ground is connected to provide combustion air for it with the multiple lower burner.
- 4. annular lime shaft kiln according to claim 3, it is characterised in that also include being used to outwards take out from the preheating zone The main smoke discharging blower fan system of smoking gas, the main smoke discharging blower fan system include flue gas pump orifice at the top of the outer barrel, with The smoke settlement pipe and the main smoke discharging blower fan that connect with smoke settlement pipe of flue gas pump orifice connection, wherein, main smoke discharging blower fan with The negative pressure and the multiple bed of material cooling wind that the multiple bed of material cooling blower is arranged so that in the multiple lower combustion chamber go out Negative pressure at mouthful is consistent, so as to be flowed in the bottom without airless in quenched band is flowed.
- 5. annular lime shaft kiln according to claim 4, it is characterised in that the multiple upper combustion chamber and it is the multiple under Combustion chamber is arranged to combustion gas fully burning in it with the combustion air.
- 6. annular lime shaft kiln according to claim 1, it is characterised in that the multiple upper combustion chamber and it is the multiple under Combustion chamber uses fuel/air mixture fractional combustion mode, and/or the multiple upper burner and the multiple lower burner all using low NOx burners.
- 7. annular lime shaft kiln according to claim 1, it is characterised in that also including ash discharge platform and positioned at ash discharge platform On ash hoist, bed of material cooling wind inlet pipe is arranged at ash discharge mesa base and using the negative pressure in the kiln body by the external world Air is sucked in the kiln body.
- 8. annular lime shaft kiln according to claim 7, it is characterised in that also include more above the ash hoist Individual cutting plate, wherein, between the multiple upper arch bridge and the multiple lower arch bridge, the multiple lower arch bridge and the multiple sub-material It is dislocation arrangement between plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720544143.8U CN206751666U (en) | 2017-05-17 | 2017-05-17 | Annular lime shaft kiln |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720544143.8U CN206751666U (en) | 2017-05-17 | 2017-05-17 | Annular lime shaft kiln |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206751666U true CN206751666U (en) | 2017-12-15 |
Family
ID=60617267
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720544143.8U Withdrawn - After Issue CN206751666U (en) | 2017-05-17 | 2017-05-17 | Annular lime shaft kiln |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206751666U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106986561A (en) * | 2017-05-17 | 2017-07-28 | 江苏中圣园科技股份有限公司 | Annular lime shaft kiln |
| CN111592242A (en) * | 2020-06-01 | 2020-08-28 | 大石桥市宝鼎耐火材料有限公司 | High-yield environment-friendly automatic dead-burned magnesia shaft kiln and production method thereof |
| WO2022115897A1 (en) * | 2020-12-04 | 2022-06-09 | Calix Ltd | Processes and methods for the calcination of materials |
-
2017
- 2017-05-17 CN CN201720544143.8U patent/CN206751666U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106986561A (en) * | 2017-05-17 | 2017-07-28 | 江苏中圣园科技股份有限公司 | Annular lime shaft kiln |
| CN111592242A (en) * | 2020-06-01 | 2020-08-28 | 大石桥市宝鼎耐火材料有限公司 | High-yield environment-friendly automatic dead-burned magnesia shaft kiln and production method thereof |
| WO2022115897A1 (en) * | 2020-12-04 | 2022-06-09 | Calix Ltd | Processes and methods for the calcination of materials |
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