CN105776905B - A kind of suction type lime shaft kiln - Google Patents
A kind of suction type lime shaft kiln Download PDFInfo
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- CN105776905B CN105776905B CN201610332443.XA CN201610332443A CN105776905B CN 105776905 B CN105776905 B CN 105776905B CN 201610332443 A CN201610332443 A CN 201610332443A CN 105776905 B CN105776905 B CN 105776905B
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- kiln
- feed bin
- kiln body
- flue gas
- furnace bottom
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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
Abstract
The invention discloses a kind of suction type lime shaft kiln, has kiln body, and the top of kiln body is provided with distribution device, bottom is provided with drawing mechanism, the distribution device is made up of care feed tray and averaging wind pipe, and with being fixedly connected at the top of kiln body, lower end is fixedly connected with care feed tray for the upper end of averaging wind pipe；Transition feed bin is housed above the distribution device, emission of baiting chute is housed at the top of transition feed bin, the external charging equipment of emission of baiting chute, a ring-shaped flue is provided with around transition feed bin in transition feed bin lower loop；The drawing mechanism has material distributing cone, and furnace bottom storage bin hopper is provided with below material distributing cone, is disposed with cooling wind guide duct in furnace bottom storage bin hopper surrounding, ash hoist is provided with below furnace bottom storage bin hopper, furnace bottom transition feed bin and belt conveyor are provided with below ash hoist；The ring-shaped flue side is connected equipped with fume pipe with flue gas purification system, the external high-pressure suction fan of flue gas purification system；The present invention is opened wide using furnace bottom, the suction type working condition of boiler roof sealing, the problem of improving kiln body periphery dust pollution at all.
Description
Technical field
The invention belongs to technical field of industrial furnaces, specifically a kind of suction type lime shaft kiln, the present invention is applied to powder
Coal, lump coal, moulded coal or coke are the lime shaft kiln of fuel.
Background technology
China's lime total output has been over 200,000,000 tons, 30% or so metallurgy lime of the total dosage of lime is accounted for, due to visitor
Family is big with ash quantity and stablizes, the also more and more higher, therefore its technical equipment is in lime industry of the requirement to product quality
Leading position, as rotary kiln, sleeve kiln, the cocurrent accumulation of heat Shuan Tangyaodeng worlds gas-burning kiln overwhelming majority are gathered around by smelter
Have；The building lime and chemical industry ash of the total dosage 70% or so of lime are accounted for, because user is scattered in the city and township of all parts of the country
Village, client is small with ash quantity, and Product transport radius is small, this feature necessarily determine grey production for building it is more, it is wide, production rule
The small general layout of mould, kiln type is to produce daily based on 300 tons of earth kiln and old-fashioned boiler-turbine CCS.
All parts of the country spread all over the place countless bedstone ash earth kilns, and its yield accounts for more than the 90% of the total dosage of building lime, as
The building limes of conventional industries produce energy consumption structure based on coal will not radical change, carbon dioxide, sulfur dioxide, nitrogen
The control emission of oxide and flue dust is increasingly urgent, there is that scope of the enterprise is small, quantity is more in building lime industry development, absolutely mostly
Number enterprises technological equipment backwardness, poor product quality, energy resource consumption height, environmental pollution is serious, resource utilization is low, production and operation not
Specification, national resources is both wasted, and surrounding enviroment are caused seriously to pollute, be more degrading this very fragile ecological environment
, superseded register is included in by country already, the paces that lime earth kiln is eliminated in various regions are more and more faster.
In order to change lime earth kiln using waste of resource and sacrificialing environment as the mode of production of cost, accelerate to carry out cleaning life
Production, to improve quality, save, save land, economize on water, profit is useless and pollution treatment is dropped haze direction and developed, as lime earth kiln upgrading product
New structure lime shaft kiln grows up like the mushrooms after rain, but new structure lime shaft kiln species is various, at present the stone of main flow
Grey shaft furnace, its design feature are mainly reflected in the following aspects：
1. the problem of air inlet mode mainly uses kiln bottom air blast mode, existed is：Dust pollution is serious around kiln body, right
Kiln body sealing property requires high, and smoke gas treatment is not thorough, and waste gas caused by lime shaft kiln is not complete in preheating zone and lime stone
Total heat exchange, EGT rise, is not saved, lime stone is not not reaching to 700 DEG C and is put into burning zone, increases raw burn
Rate；
2. cloth system uses screw distribution mode, cloth center is fixed, and has transmission mechanism, lime shaft kiln section be present
Cloth is also uneven, dead angle be present, and they all reduce the dischargeable capacity of lime shaft kiln, influences yield, and easily hair be present
The problem of raw mechanical breakdown；
3. level-sensing device is generally located on inside kiln body, apart from 2~3 meters of the position in kiln top, charge level reaches level-sensing device in kiln
During position, feed supplement could be carried out, it is impossible to ensure the continuity of production in kiln；
4. discharge system is using mode, incidental problems such as flashboard discharging, multiple discharge, supporting plate dischargings：（1）Cross
Burning rate and underburnt rate are high, are also easy to produce coking,（2）Discharge pit produces substantial amounts of dust, pollutes environment and influences operative employee's health,
（3）Burned block lime is broken into pieces, becomes fritter or powdery, influences economic benefit,（4）Drop temperature is more than 120 DEG C, cigarette
Temperature degree not only wastes the energy between 200-300 DEG C, and is unfavorable for the dedusting of flue gas and the conveying of material,（5）Discharging
Necessary blowing-out, change three band temperature, kiln easily coking in kiln.
Because existing lime shaft kiln generally uses said structure, cause kiln fuel, air flow method not uniform enough, tie
Knurl, the technology accident such as burning partially take place frequently, and product quality fluctuation is excessive；And belong to positive pressure operation, kiln body sealing property is required it is high,
Flue-gas cleaning devices are simple and crude, still suffer from the halfway drawback of smoke and dust treatment.
The content of the invention
The purpose of the present invention is not reasonable aiming at existing lime shaft kiln structure design, causes technique in production process
Frequent Accidents, product quality fluctuation are big, and pollute the problem of huge to surrounding enviroment, there is provided a kind of suction type lime shaft kiln.
The technical scheme is that：A kind of suction type lime shaft kiln, has kiln body, and the top of kiln body is provided with furnace roof steel knot
Structure platform and roof support beam, furnace roof steel structure platform center are provided with distribution device, the bottom of kiln body be provided with kiln body supporting table and
Furnace bottom support beam, kiln body supporting table center are provided with drawing mechanism, are followed successively by preheating zone, burning zone, cold inside kiln body from top to bottom
But band, the kiln body vertical section are in small at both ends and big in the middle olive shape structure, particularly：
The distribution device is made up of care feed tray and 3~6 averaging wind pipes, the upper end of averaging wind pipe and furnace roof steel structure platform and
Roof support beam is fixedly connected, and lower end is fixedly connected with care feed tray；Transition feed bin, transition feed bin are housed above the distribution device
Top is equipped with closed cover plate, and the top of closed cover plate is equipped with emission of baiting chute, the external charging equipment of emission of baiting chute, emission of baiting chute
It is upper that air valve is housed；Transition feed bin bottom is provided with tremie pipe, certain depth in tremie pipe insertion kiln, and is misplaced cloth with averaging wind pipe
Put；In transition feed bin lower loop a ring-shaped flue, the outer wall sealing of ring-shaped flue upper end and transition feed bin are provided with around transition feed bin
Connection, lower end are tightly connected with furnace roof steel structure platform；
The drawing mechanism has material distributing cone, and material distributing cone is fixedly mounted in furnace bottom support beam, the kiln body below material distributing cone
Supporting table center is provided with furnace bottom storage bin hopper, and 3~6 cooling wind guide ducts, furnace bottom storage bin hopper are uniformly distributed on peripheries with furnace bottom storage bin hopper
Lower section is provided with ash hoist, and furnace bottom transition feed bin is provided with below ash hoist, belt conveyor is provided with below the excessive feed bin of furnace bottom；
The ring-shaped flue side is also equipped with fume pipe and is connected with flue gas purification system, and the external high pressure of flue gas purification system is drawn
Blower fan, by furnace roof air inducing, making, the cold air of furnace bottom passes sequentially through the bed of material gap of furnace bottom to high-pressure suction fan and cooling wind is led
Airduct, the cooling zone of kiln body, burning zone, preheating zone reach furnace roof, enter annular cigarette by furnace roof averaging wind pipe and bed of material gap
Road, emptied after flue gas purification system is handled.
The dischargeable capacity of the kiln body is 100~500m3, effective a height of 16~25m, top 5m~6m is preheating zone, its
Internal diameter is glossily shunk upwards by φ 2m~φ 6m with 70 ° of angles of ＞, and φ 1.5m~φ 3m are narrowed down to preheating zone top internal diameter；In
Portion 6m~10m is burning zone, and its internal diameter is φ 2m~φ 6m cylindrical shape；Bottom 5m~6m is cooling zone, and its internal diameter is by φ 2m
~φ 6m narrow down to φ 1.5m~φ 3m with 70 ° of angles of ＞ glossily retracted downward to cooling zone bottom inner diameter, and it is small to form two,
Olive shape kiln body longitudinal plane structure broad in the middle.
Level-sensing device is also equipped with above the transition feed bin, upper and lower two Level control lines are set in transition feed bin, it is described
Material position is calculated as radar type level-sensing device or Plumb-bob Material Level Meter, and the level-sensing device connects with charging equipment control.
The tremie pipe of the transition feed bin is located at center at the top of kiln, and respectively pipe ring is arranged around tremie pipe surrounding.
The ring-shaped flue is used for the temperature for measuring furnace roof flue gas built with flue gas thermal resistance, and furnace bottom storage bin hopper bottom is equipped with
Lime thermal resistance is used for the temperature for measuring finished product lime；The air feed of the kiln body shares one with flue gas purification system and carries frequency conversion
The high-pressure suction fan of governor, the frequency control machine of high-pressure suction fan are high according to furnace roof flue-gas temperature and furnace bottom lime temperature adjustment
Press the suction air volume of air-introduced machine；The wind flow of high-pressure suction fan also meets to feed the fuel completely burned in kiln in the unit interval simultaneously
The supply of required air quantity and lime cooling air volume, and the CO that combustion product and decomposition of limestone go out2Deng the discharge of waste gas；
The total head of high-pressure suction fan is higher than bulk cargo layer resistance, the tube side resistance by kiln top to flue gas purification system and gas cleaning system in kiln
System body resistance sum.
Flue gas exhaust stack is housed on the fume pipe, flue gas diffusion valve is housed on the flue gas exhaust stack.
The kiln body is followed successively by working lining, permanent liner, thermal insulation layer, the preheating zone working lining and cooling zone work from the inside to the outside
It is pre-formed using three-level high alumina or clay refractory casting material as lining, burning zone working lining is to use two level high alumina or one-level
High alumina refractory casting material is pre-formed；The prefabricated tile height is that 300-500mm is contour, and radial dimension is 350-500mm etc.
Long, radian press prefabricated component size, divides 360 ° per ring 24-36 blocks etc., and prefabricated component is built by laying bricks or stones using lifting, makes the same of each cross section in kiln
Heart degree is highly consistent, the smooth no faulting of slab ends of kiln inner working face.
Transition feed bin at the top of kiln of the present invention, enough lime shaft kiln coals of more than 1 hour can be stored（It is burnt）Stone compound
Charge, and closed cover plate, level-sensing device and emission of baiting chute are provided with the top of transition feed bin, be disposed with transition feed bin,
Lower material position control line, when level-sensing device detects that material position reaches lower material position control line in transition feed bin, communicate instructions to feeding and set
Standby, the air valve on emission of baiting chute automatically opens up, and charging equipment carries out feeding supplement automatically, when the material position in transition feed bin reaches
During upper material position control line, charging equipment is communicated instructions to, charging equipment is automatically stopped feeding, the emission of baiting chute above excessive feed bin
On air valve close automatically, making transition feed bin, kiln top is in sealing state all the time during feeding is carried out.Transition feed bin
Interior material enters kiln body through tremie pipe, and due to being provided with care feed tray below tremie pipe, surrounding is fixed with averaging wind pipe, when under material warp
When expects pipe enters kiln body, accepted by care feed tray, then spread under material Gravitative Loads through the space around averaging wind pipe to kiln first
Body periphery, arc prefabricated board inclined-plane of the bulk materials through kiln body preheating zone are repelled to kiln center, and piece material is along kiln wall
Downslide is trapped near kiln wall, makes coal（It is burnt）Stone raw material is further mixed, and forms " the bottom of a pan " shape charge level.So as to effectively keep away
Exempt from " the kiln wall effect " of shaft furnace inherently, reduce or even prevented the technology accidents such as the dross triggered by side wind surplus, inclined burning.
The drawing mechanism in kiln bottom portion of the present invention, is designed with a material distributing cone, and material distributing cone can be uniform by the material at kiln center
Ground is diverted to periphery so as to realize the uniform sinking of material in kiln, and furnace bottom storage bin hopper and ash discharge are disposed with below material distributing cone
Machine equably can unload lime, kiln bottom transition feed bin and belt conveyor are provided with below ash hoist, in time by lime finished product
Transport.
Maximum inventive point of the invention is：The intrinsic air inlet mode of lime shaft kiln is changed, by traditional lime shaft kiln
By kiln bottom air blast, it is changed to from kiln top exhausting, and in order to increase the ventilation at kiln body center, the furnace bottom storage bin hopper four in kiln bottom portion
Week equipped with 3-6 cooling wind guide duct, arranges 3-6 averaging wind pipe in furnace roof care feed tray surrounding, is provided with above averaging wind pipe closed
Ring-shaped flue be connected with flue gas purification system and high-pressure suction fan, when high-pressure suction fan is in furnace roof exhausting, the cold sky of furnace bottom
Under the big draft effect of high-pressure suction fan, bed of material gap and cooling wind guide duct through ash hoist and furnace bottom storage bin hopper enter gas
Kiln body cooling zone, burned lime is cooled down, kiln discharge lime temperature is reduced to less than 80 DEG C, while cooled down wind and added
Heat, the burning of fuel, the CO that combustion product goes out with decomposition of limestone are participated in when reaching burning zone2Continue to move up, reach
Preheating zone and coal（It is burnt）Stone raw material carries out heat exchange, is preheated lime stone, when heat smoke reaches kiln top distribution device, care feed tray
Bed of material gap of the flue gas on periphery through care feed tray periphery is risen in ring-shaped flue more than charge level, in care feed tray lower cavity
Kiln body center flue gas is then guided in the ring-shaped flue of furnace roof by averaging wind pipe, so as to strengthen the ventilation at kiln body center, reaches annular
The flue-gas temperature of flue drops to less than 150 DEG C, is introduced into by air-introduced machine in flue gas purification system.In lime manufacturing process, by
Closed negative pressure state is in whole furnace roof, and there is provided the cooling wind guide duct of furnace bottom and the averaging wind pipe of furnace roof, in height
Under the big draft effect for pressing air-introduced machine, the ventilation at kiln body center is greatly strengthen, it is intrinsic that shaft furnace can effectively be alleviated or avoided
" kiln wall effect ", reduce or prevented the technology accidents such as the dross triggered by side wind surplus, inclined burning.
The suction type lime shaft kiln of the present invention, work under boiler roof sealing, the unlimited negative pressure state of furnace bottom, normally producing
When, air inducing is carried out by the high-pressure suction fan of furnace roof, realizes the ventilation and heat exchange of furnace interior, and no ash-laden gas is discharged into
Air, fundamentally improve the dust pollution on kiln body periphery.Kiln inner top is equipped with fixed distribution device, bottom equipped with uniform
Ash discharging gear, kiln body inside is in small at both ends and big in the middle olive shape structure, the smooth no faulting of slab ends of kiln inner working face, makes coal（It is burnt）Stone
Material is well mixed, air flow method is uniform, is advantageous to material and uniformly smoothly moves down, intrinsic so as to which shaft furnace is effectively alleviated or avoided
" kiln wall effect ", reduce or prevented because of side wind is superfluous and triggers dross, the technology accident such as burnt partially, good product quality and surely
It is fixed, by the accurate adjustment of high-pressure suction fan parameter, kiln discharge flue-gas temperature can be made below 150 DEG C, kiln discharge lime temperature is 80
Below DEG C, thus energy consumption is low, and production environment is good, and the service life of refractory lining was up to more than 15 years.
Brief description of the drawings
The master that Fig. 1 is the present invention cuts open schematic diagram；
Fig. 2 is Fig. 1 top view（Without emission of baiting chute）；
Fig. 3 is Fig. 1 A-A profiles；
Fig. 4 is Fig. 1 B-B profiles；
Fig. 5 is Fig. 1 C-C profiles.
In figure, 1-kiln body, 2-furnace roof steel structure platform, 3-roof support beam, 4-distribution device, the support of 5-kiln body
Platform, 6-furnace bottom support beam, 7-drawing mechanism, 8-preheating zone, 9-burning zone, 10-cooling zone, 11-care feed tray, 12-
Airduct, 13-transition feed bin, 14-closed cover plate, 15-emission of baiting chute, 16-air valve, 17-tremie pipe, 18-annular
Flue, 19-material distributing cone, 20-furnace bottom storage bin hopper, 21-cooling wind guide duct, 22-ash hoist, 23-furnace bottom transition feed bin,
24-belt conveyor, 25-fume pipe, 26-flue gas purification system, 27-high-pressure suction fan, 28-level-sensing device, 29-flue gas
Thermal resistance, 30-lime thermal resistance, 31-flue gas exhaust stack, 32-flue gas diffusion valve, 33-working lining, 34-permanent liner,
35-thermal insulation layer, 36-preheating zone working lining, 37-cooling zone working lining, 38-burning zone working lining.
Embodiment
Embodiment 1
The present embodiment is exemplified by producing 300 tons of suction type lime shaft kilns daily, to explain in detail technical scheme, but
It is that the invention is not limited in any way for the present embodiment.
Referring to Fig. 1~5, the technical scheme of the present embodiment is：A kind of suction type lime shaft kiln, there is kiln body 1, kiln body 1
Top is provided with furnace roof steel structure platform 2 and roof support beam 3, and the center of furnace roof steel structure platform 2 is provided with distribution device 4, kiln body
Bottom is provided with kiln body supporting table 5 and furnace bottom support beam 6, and the center of kiln body supporting table 4 is provided with drawing mechanism 7, inside kiln body from upper and
Under be followed successively by preheating zone 8, burning zone 9, cooling zone 10, the kiln body vertical section is in small at both ends and big in the middle olive shape structure, special
It is not：
The distribution device 4 is made up of care feed tray 11 and 3~6 averaging wind pipes 12（Specifically there are 4 equal wind in the present embodiment
Pipe）, the upper end of averaging wind pipe 12 is fixedly connected with furnace roof steel structure platform 2 and roof support beam 3, and lower end is fixed with care feed tray 11 to be connected
Connect；The top of distribution device 4 is equipped with transition feed bin 13, and the top of transition feed bin 13 is equipped with closed cover plate 14, closed cover plate
14 top is equipped with emission of baiting chute 15,15 external charging equipment of emission of baiting chute, and air valve 16 is housed on emission of baiting chute 15；Transition Materials
The bottom of storehouse 13 is provided with tremie pipe 17, and tremie pipe 17 inserts certain depth in kiln, and misplaces and arrange with averaging wind pipe 12；In transition feed bin
13 lower loops are provided with a ring-shaped flue 18 around transition feed bin 13, and the upper end of ring-shaped flue 18 and the outer wall sealing of transition feed bin 13 connect
Connect, lower end is tightly connected with furnace roof steel structure platform 2；
The drawing mechanism 7 has material distributing cone 19, and material distributing cone 19 is fixedly mounted in furnace bottom support beam 6, under material distributing cone 19
The center of kiln body supporting table 5 of side is provided with furnace bottom storage bin hopper 20, and 3~6 cooling wind wind-guidings are uniformly distributed on peripheries with furnace bottom storage bin hopper 20
Pipe 21（Specifically there are 4 cooling wind guide ducts in the present embodiment）, the lower section of furnace bottom storage bin hopper 20 is provided with ash hoist 22, under ash hoist 22
Side is provided with furnace bottom transition feed bin 23, and the excessive lower section of feed bin 23 of furnace bottom is provided with belt conveyor 24；
The side of ring-shaped flue 18 is also equipped with fume pipe 25 and is connected with flue gas purification system 26, outside flue gas purification system 26
Connect high-pressure suction fan 27, high-pressure suction fan 27 is by furnace roof air inducing, making the cold air of furnace bottom pass sequentially through between the bed of material of furnace bottom
Gap and cooling wind guide duct 21, the cooling zone 10 of kiln body, burning zone 9, preheating zone 8 reach furnace roof, by furnace roof averaging wind pipe 12 and
Bed of material gap enters ring-shaped flue 18, is emptied after the processing of flue gas purification system 26.
The dischargeable capacity of the kiln body 1 is 100~500m3, effective a height of 16~25m, top 5m~6m is preheating zone, its
Internal diameter is glossily shunk upwards by φ 2m~φ 6m with 70 ° of angles of ＞, and φ 1.5m~φ 3m are narrowed down to preheating zone top internal diameter；In
Portion 6m~10m is burning zone, and its internal diameter is φ 2m~φ 6m cylindrical shape；Bottom 5m~6m is cooling zone, and its internal diameter is by φ 2m
~φ 6m narrow down to φ 1.5m~φ 3m with 70 ° of angles of ＞ glossily retracted downward to cooling zone bottom inner diameter, and it is small to form two,
Olive shape kiln body longitudinal plane structure broad in the middle.
In the present embodiment, the dischargeable capacity of specific kiln body 1 is specially 430m3, effective a height of 22m, top 6m is preheating zone
8, its internal diameter is glossily shunk upwards by φ 6m with 70 ° of angles of ＞, and φ 2m are narrowed down to the top internal diameter of preheating zone 8；Middle part 10m is to forge
Band 9 is burnt, its internal diameter is φ 6m cylindrical shape；Bottom 6m is cooling zone 10, and its internal diameter is glossily received downwards by φ 6m with 70 ° of angles of ＞
Contracting, narrows down to φ 2m to the bottom inner diameter of cooling zone 10, forms small at both ends and big in the middle olive shape kiln body longitudinal plane structure.
The top of transition feed bin 13 is also equipped with level-sensing device 28, and upper and lower two Level controls are set in transition feed bin 13
Line, the level-sensing device 28 are radar type level-sensing device or Plumb-bob Material Level Meter.The dischargeable capacity of transition feed bin is in the present embodiment
20m3, coal can be stored in transition feed bin（It is burnt）30 tons of stone compound（The hour charge of the suction type lime shaft kiln of 300 tons of daily output
For 25 tons）.
The tremie pipe 17 of the transition feed bin 13 is located at center at the top of kiln, is in charge of 12 around the surrounding cloth of tremie pipe 17
Put.
The ring-shaped flue 18 is used to measuring the temperature of furnace roof flue gas built with flue gas thermal resistance 29, under furnace bottom storage bin hopper 20
Portion is used for the temperature for measuring finished product lime equipped with lime thermal resistance 30；The air feed of the kiln body 1 shares with flue gas purification system 26
One high-pressure suction fan 27 for carrying frequency control machine, the frequency control machine of high-pressure suction fan 27 is according to furnace roof flue-gas temperature and stove
The suction air volume of bedstone ash temperature adjustment high-pressure suction fan；The wind flow of high-pressure suction fan 27 also meets to feed in the unit interval simultaneously
The supply of fuel completely burned required air quantity and lime cooling air volume in kiln, and combustion product and decomposition of limestone go out
CO2Deng the discharge of waste gas；The total head of high-pressure suction fan 27 is higher than bulk cargo layer resistance in kiln, by kiln top to flue gas purification system 26
Tube side resistance and flue gas purification system body resistance sum.
Flue gas exhaust stack 31 is housed on the fume pipe 25, flue gas diffusion valve 32 is housed on the flue gas exhaust stack 31.
The kiln body 1 is followed successively by working lining 33, permanent liner 34, thermal insulation layer 35, the preheating zone working lining 36 from the inside to the outside
It is pre-formed using three-level high alumina or clay refractory casting material with cooling zone working lining 37, burning zone working lining 38 is to use
Two level high alumina or one-level high alumina refractory casting material are pre-formed；The prefabricated tile height is that 300-500mm is contour, radial dimension
Isometric for 350-500mm, radian presses prefabricated component size, and per 360 ° of ring 24-36 blocks etc. point, prefabricated component is built by laying bricks or stones using lifting, makes kiln
The concentricity in interior each cross section is highly consistent, the smooth no faulting of slab ends of kiln inner working face.
In the present embodiment, kiln body preheating zone working lining 36 and cooling zone working lining 37 are specifically to use three-level High-Alumina fire resisting
Casting material prefabricated shaping, burning zone working lining 38 is pre-formed using two level high alumina refractory casting material, and permanent liner 34 is using viscous
The casting material prefabricated shaping of soil property, the height of prefabricated section is contour for 350mm, and radial dimension is that 345mm is isometric, and radian is pressed per 30 pieces of ring
360 ° of decile.
Claims (7)
1. a kind of suction type lime shaft kiln, has kiln body, the top of kiln body is provided with furnace roof steel structure platform and roof support beam, stove
Top steel structure platform center is provided with distribution device, and the bottom of kiln body is provided with kiln body supporting table and furnace bottom support beam, kiln body supporting table
Center is provided with drawing mechanism, is followed successively by preheating zone, burning zone, cooling zone inside kiln body from top to bottom, and the kiln body vertical section is in
Small at both ends and big in the middle olive shape structure, it is characterised in that：
The distribution device is made up of care feed tray and 3~6 averaging wind pipes, upper end and furnace roof steel structure platform and the furnace roof of averaging wind pipe
Support beam is fixedly connected, and lower end is fixedly connected with care feed tray；Transition feed bin, transition feed bin top are housed above the distribution device
Equipped with closed cover plate, the top of closed cover plate is equipped with emission of baiting chute, the external charging equipment of emission of baiting chute, is filled on emission of baiting chute
There is air valve；Transition feed bin bottom is provided with tremie pipe, and tremie pipe inserts certain depth in kiln, and misplaces and arrange with averaging wind pipe；
Transition feed bin lower loop is provided with a ring-shaped flue around transition feed bin, and the outer wall of ring-shaped flue upper end and transition feed bin is tightly connected,
Lower end is tightly connected with furnace roof steel structure platform；
The drawing mechanism has material distributing cone, and material distributing cone is fixedly mounted in furnace bottom support beam, the kiln body support below material distributing cone
Platform center is provided with furnace bottom storage bin hopper, and 3~6 cooling wind guide ducts, furnace bottom storage bin hopper lower section are uniformly distributed on peripheries with furnace bottom storage bin hopper
Provided with ash hoist, furnace bottom transition feed bin is provided with below ash hoist, belt conveyor is provided with below the excessive feed bin of furnace bottom；
The ring-shaped flue side is also equipped with fume pipe and is connected with flue gas purification system, the external high pressure air inducing of flue gas purification system
Machine, high-pressure suction fan is by furnace roof air inducing, making the cold air of furnace bottom pass sequentially through bed of material gap and the cooling wind wind-guiding of furnace bottom
Pipe, the cooling zone of kiln body, burning zone, preheating zone reach furnace roof, enter ring-shaped flue by furnace roof averaging wind pipe and bed of material gap,
Emptied after flue gas purification system is handled.
A kind of 2. suction type lime shaft kiln according to claim 1, it is characterised in that：The dischargeable capacity of the kiln body is
100~500m3, effective a height of 16~25m, top 5m~6m is preheating zone, and its internal diameter is smooth with 70 ° of angles of ＞ by φ 2m~φ 6m
Ground is shunk upwards, and φ 1.5m~φ 3m are narrowed down to preheating zone top internal diameter；Middle part 6m~10m is burning zone, and its internal diameter is φ
2m~φ 6m cylindrical shape；Bottom 5m~6m is cooling zone, and its internal diameter is glossily received downwards by φ 2m~φ 6m with 70 ° of angles of ＞
Contracting, narrows down to φ 1.5m~φ 3m to cooling zone bottom inner diameter, forms small at both ends and big in the middle olive shape kiln body vertical section knot
Structure.
A kind of 3. suction type lime shaft kiln according to claim 1, it is characterised in that：Also installed above the transition feed bin
There is level-sensing device, upper and lower two Level control lines are set in transition feed bin, the material position is calculated as radar type level-sensing device or Weight type material
Position meter.
A kind of 4. suction type lime shaft kiln according to claim 1, it is characterised in that：The tremie pipe position of the transition feed bin
The center at the top of kiln, respectively pipe ring is around tremie pipe surrounding arrangement.
A kind of 5. suction type lime shaft kiln according to claim 1, it is characterised in that：The ring-shaped flue is built with flue gas
Thermal resistance is used for the temperature for measuring furnace roof flue gas, and furnace bottom storage bin hopper bottom is used for the temperature for measuring finished product lime equipped with lime thermal resistance
Degree；The air feed of the kiln body shares a high-pressure suction fan for carrying frequency control machine, high-pressure suction fan with flue gas purification system
Frequency control machine according to furnace roof flue-gas temperature and the suction air volume of furnace bottom lime temperature adjustment high-pressure suction fan；High-pressure suction fan
Wind flow also meets to feed fuel completely burned required air quantity and lime cooling air volume in kiln in the unit interval simultaneously
Supply, and the CO that combustion product and decomposition of limestone go out2Deng the discharge of waste gas；The total head of high-pressure suction fan is higher than bulk cargo in kiln
Layer resistance, tube side resistance and flue gas purification system body resistance sum by kiln top to flue gas purification system.
A kind of 6. suction type lime shaft kiln according to claim 1, it is characterised in that：Put on the fume pipe equipped with flue gas
Separate tube, flue gas diffusion valve is housed on the flue gas exhaust stack.
A kind of 7. suction type lime shaft kiln according to claim 1, it is characterised in that：The kiln body is followed successively by from the inside to the outside
Working lining, permanent liner, thermal insulation layer, the preheating zone working lining and cooling zone working lining are to use three-level high alumina or clayey fire resisting
Casting material prefabricated shaping, burning zone working lining are pre-formed using two level high alumina or one-level high alumina refractory casting material；It is prefabricated
Tile height is that 300-500mm is contour, and radial dimension is that 350-500mm is isometric, and radian presses prefabricated block size, per ring 24-36 blocks etc.
Divide 360 °, prefabricated section is built by laying bricks or stones using lifting, makes the concentricity in each cross section in kiln highly consistent, kiln inner working face is smooth error-free
Platform.
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| CN105776905B true CN105776905B (en) | 2017-11-24 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109336422B (en) * | 2018-11-26 | 2024-03-19 | 中冶焦耐(大连)工程技术有限公司 | Combined distributing device for shaft kiln capable of calcining small-granularity limestone |
| CN112441757A (en) * | 2020-12-17 | 2021-03-05 | 江苏实亚新材料科技有限公司 | Anthracite lime shaft kiln and transformation method thereof |
| CN114804667B (en) * | 2022-06-13 | 2023-04-07 | 山东钢铁集团永锋临港有限公司 | Method for controlling material level in hearth of double-hearth lime kiln |
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