CN205740770U - A kind of negative-pressure type lime shaft kiln - Google Patents
A kind of negative-pressure type lime shaft kiln Download PDFInfo
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- CN205740770U CN205740770U CN201620456749.1U CN201620456749U CN205740770U CN 205740770 U CN205740770 U CN 205740770U CN 201620456749 U CN201620456749 U CN 201620456749U CN 205740770 U CN205740770 U CN 205740770U
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Abstract
The utility model discloses a kind of negative-pressure type lime shaft kiln, have kiln body, the top of kiln body is provided with distribution device, bottom is provided with drawing mechanism, described distribution device is made up of care feed tray and averaging wind pipe, and the upper end of averaging wind pipe is fixing with kiln body top to be connected, and lower end is fixing with care feed tray to be connected；Equipped with transition feed bin above described distribution device, transition feed bin top equipped with emission of baiting chute, the external charging equipment of emission of baiting chute, be provided with a ring-shaped flue at transition feed bin lower loop around transition feed bin；Described drawing mechanism has material distributing cone, is provided with furnace bottom storage bin hopper below material distributing cone, is disposed with cooling wind guide duct in furnace bottom storage bin hopper surrounding, is provided with ash hoist, is provided with furnace bottom transition feed bin and belt conveyor below ash hoist below furnace bottom storage bin hopper；Described ring-shaped flue side is connected with flue gas purification system equipped with fume pipe, the external high-pressure suction fan of flue gas purification system；This utility model uses furnace bottom to open wide, the negative-pressure type duty of boiler roof sealing, the problem at all improving kiln body periphery dust pollution.
Description
Technical field
This utility model belongs to technical field of industrial furnaces, and specifically a kind of negative-pressure type lime shaft kiln, this utility model is applicable to the lime shaft kiln with fine coal, lump coal, moulded coal or coke as fuel.
Background technology
China's Calx total output has been over 200,000,000 tons, account for the total consumption of Calx about 30% metallurgy lime, due to client with ash quantity big and stablize, more and more higher to the requirement of product quality, therefore its technical equipment is in the leading position of lime industry, such as rotary kiln, sleeve kiln and flow the accumulation of heat Shuan Tangyaodeng world gas-burning kiln overwhelming majority and had by smelter；Account for building lime and the chemical industry ash of the total consumption of Calx about 70%, owing to user is scattered in city and the rural area of all parts of the country, client is little by ash quantity, and Product transport radius is little, this feature necessarily determines the ash general layout that production is many, wide, production scale is little for building, and kiln type is with daily output
The earth kiln of 300 tons and old-fashioned boiler-turbine CCS are main.
All parts of the country spread all over the place countless bedstone ash earth kiln, its yield accounts for more than the 90% of the total consumption of building lime, producing energy consumption structure based on coal as the building lime of conventional industries will not radical change, carbon dioxide, sulfur dioxide, the control emission of nitrogen oxides and flue dust is the most urgent, there is scope of the enterprise in building lime industry development little, quantity is many, most enterprises technological equipment falls behind, poor product quality, energy resource consumption is high, environmental pollution is serious, resource utilization is low, production and operation are lack of standardization, both national resources had been wasted, again surrounding enviroment are caused severe contamination, more it is degrading this most fragile ecological environment, listed in superseded register already by country, the paces that Calx earth kiln is eliminated in various places are more and more faster.
In order to change Calx earth kiln with waste resource and the sacrificialing environment mode of production as cost, accelerate to carry out cleaning to produce, to improve quality, energy-conservation, save land, economize on water, profit is useless and pollution treatment fall haze direction is developed, new structure lime shaft kiln as Calx earth kiln upgrading product grows up like the mushrooms after rain, but new structure lime shaft kiln is of a great variety, the at present lime shaft kiln of main flow, its construction features is mainly reflected in the following aspects:
1. air inlet mode mainly uses kiln bottom air blast mode, there is the problem that around kiln body, dust pollution is serious, kiln body sealing property is required height, smoke gas treatment is the most thorough, and the waste gas that lime shaft kiln produces does not has complete heat exchange in preheating zone and limestone, EGT raises, the most energy-conservation, limestone is not not reaching to 700 DEG C and is put into burning zone, increases raw burn rate；
2. cloth system all uses screw distribution mode, and cloth center is fixed, and has drive mechanism, there is lime shaft kiln section cloth the most uneven, there is dead angle, they all decrease the dischargeable capacity of lime shaft kiln, affect yield, and there is the problem being susceptible to mechanical breakdown；
3. level-sensing device is generally located on inside kiln body, distance kiln crown 2～the position of 3 meters, when charge level reaches level-sensing device position in kiln, just can carry out feed supplement, it is impossible to the seriality produced in ensureing kiln；
4. discharge system uses flashboard discharging, multiple discharge, the modes such as supporting plate discharging, incidental problem is: (1) burning rate and underburnt rate are high, it is easily generated coking, (2) discharge pit produces substantial amounts of dust, pollute environment and affect operative employee's health, (3) burned block Calx is broken into pieces, become fritter or powdery, affect economic benefit, (4) drop temperature is more than 120 DEG C, flue-gas temperature is between 200 300 DEG C, not only waste the energy, and it is unfavorable for the dedusting of flue gas and the conveying of material, (5) the necessary blowing-out of discharging, change three band temperature in kiln, kiln easily coking.
Due to the commonly used said structure of existing lime shaft kiln, causing kiln fuel, air flow method uniform not, the technology accident such as dross, inclined burning takes place frequently, and product quality fluctuation is excessive；And belong to positive pressure operation, kiln body sealing property is required that height, flue-gas cleaning devices are simple and crude, still suffer from the halfway drawback of smoke and dust treatment.
Summary of the invention
It is not reasonable that the purpose of this utility model is aiming at the design of existing lime shaft kiln structure, causes technology accident in production process to take place frequently, and product quality fluctuation is big, and surrounding enviroment are polluted huge problem, it is provided that a kind of negative-pressure type lime shaft kiln.
The technical solution of the utility model is: a kind of negative-pressure type lime shaft kiln, there is kiln body, the top of kiln body is provided with furnace roof steel structure platform and roof support beam, furnace roof steel structure platform center is provided with distribution device, and the bottom of kiln body is provided with kiln body and supports platform and furnace bottom support beam, and kiln body supports platform center and is provided with drawing mechanism, preheating zone, burning zone, cooling zone it is followed successively by from top to bottom inside kiln body, described kiln body vertical section is small at both ends and big in the middle olive shape structure, particularly:
Described distribution device is made up of care feed tray and 3～6 averaging wind pipes, and the upper end of averaging wind pipe is fixing with furnace roof steel structure platform and roof support beam to be connected, and lower end is fixing with care feed tray to be connected；Equipped with transition feed bin above described distribution device, transition feed bin top is equipped with closed cover plate, and the top of closed cover plate is equipped with emission of baiting chute, and the external charging equipment of emission of baiting chute, equipped with air valve on emission of baiting chute；Transition bin bottom is provided with tremie pipe, and tremie pipe inserts certain depth in kiln, and arranges with averaging wind pipe dislocation；Being provided with a ring-shaped flue at transition feed bin lower loop around transition feed bin, ring-shaped flue upper end is tightly connected with the outer wall of transition feed bin, and lower end is tightly connected with furnace roof steel structure platform；
Described drawing mechanism has material distributing cone, material distributing cone is fixedly mounted in furnace bottom support beam, kiln body below material distributing cone supports platform center and is provided with furnace bottom storage bin hopper, it is uniformly distributed on peripheries with 3～6 cooling wind guide ducts at furnace bottom storage bin hopper, it is provided with ash hoist below furnace bottom storage bin hopper, it is provided with furnace bottom transition feed bin below ash hoist, below the excessive feed bin of furnace bottom, is provided with belt conveyor；
Described ring-shaped flue side is also equipped with fume pipe and is connected with flue gas purification system, the external high-pressure suction fan of flue gas purification system, high-pressure suction fan is by furnace roof air inducing, the cold air making furnace bottom passes sequentially through bed of material gap and cooling wind guide duct, the cooling zone of kiln body, burning zone, the preheating zone arrival furnace roof of furnace bottom, enter ring-shaped flue through furnace roof averaging wind pipe and bed of material gap, empty after flue gas purification system processes.
The dischargeable capacity of described kiln body is 100～500m3, the most a height of 16～25m, top 5m～6m is preheating zone, and its internal diameter is the most upwards shunk with 70 ° of angles of ＞ by φ 2m～φ 6m, narrows down to φ 1.5m～φ 3m to preheating zone top internal diameter；Middle part 6m～10m is burning zone, and its internal diameter is φ 2m～the cylindrical shape of φ 6m；Bottom 5m～6m is cooling zone, and its internal diameter with 70 ° of angle retracted downward glossily of ＞, is narrowed down to φ 1.5m～φ 3m to cooling zone bottom inner diameter by φ 2m～φ 6m, forms small at both ends and big in the middle olive shape kiln body longitudinal plane structure.
Being also equipped with level-sensing device above described transition feed bin, arrange upper and lower two Level control lines in transition feed bin, described level-sensing device is radar type level-sensing device or Plumb-bob Material Level Meter, and described level-sensing device controls to be connected with charging equipment.
The tremie pipe of described transition feed bin is positioned at center, kiln crown portion, divides equally pipe ring and arranges around tremie pipe surrounding.
Described ring-shaped flue is built with flue gas thermal resistance for measuring the temperature of furnace roof flue gas, and furnace bottom storage bin hopper bottom is used for measuring the temperature of finished product Calx equipped with Calx thermal resistance；The air feed of described kiln body and flue gas purification system share a high-pressure suction fan with frequency control machine, and the frequency control machine of high-pressure suction fan regulates the suction air volume of high-pressure suction fan according to furnace roof flue-gas temperature and furnace bottom Calx temperature；The wind flow of high-pressure suction fan feeds the fuel in kiln simultaneously and burns completely the required air quantity supply with Calx cooling air volume, and the CO that combustion product and decomposition of limestone go out in also meeting the unit interval2Discharge Deng waste gas；The total head of high-pressure suction fan is higher than bulk cargo layer resistance in kiln, by the tube side resistance of kiln crown to flue gas purification system and flue gas purification system body resistance sum.
Equipped with flue gas exhaust stack on described fume pipe, equipped with flue gas diffusion valve on described flue gas exhaust stack.
Described kiln body is followed successively by working lining, permanent liner, thermal insulation layer from the inside to the outside, described preheating zone working lining and cooling zone working lining are to use three grades of high aluminas or clayey castable refractory pre-formed, and burning zone working lining is to use two grades of high aluminas or one-level High-Alumina castable refractory pre-formed；Described prefabricated section height is that 300-500mm is contour, and radial dimension is that 350-500mm is isometric, and radian presses prefabricated component size, every ring 24-36 block etc. point 360 °, prefabricated component uses lifting to build by laying bricks or stones, and in making kiln, the concentricity of each transverse section is highly consistent, and kiln inner working face is smooth without faulting of slab ends.
The transition feed bin in this utility model kiln crown portion, the enough lime shaft kilns coal of more than 1 hour (burnt) stone compound charge can be stored, and it is provided with closed cover plate at transition feed bin top, level-sensing device and emission of baiting chute, it is disposed with in transition feed bin, blanking position control line, when expecting in level-sensing device detects transition feed bin that position reaches blanking position control line, communicate instructions to charging equipment, air valve on emission of baiting chute automatically opens up, charging equipment automatically carries out feeding and supplements, when the material position in transition feed bin reaches feeding position control line, communicate instructions to charging equipment, charging equipment is automatically stopped feeding, the excessively air valve on the emission of baiting chute above feed bin is automatically switched off, make transition feed bin during carrying out feeding, kiln crown is in sealing state all the time.Material in transition feed bin enters kiln body through tremie pipe, owing to being provided with care feed tray below tremie pipe, surrounding is fixed with averaging wind pipe, when material enters kiln body through tremie pipe, first accepted by care feed tray, then under material Gravitative Loads, space around averaging wind pipe is spread to kiln body periphery, bulk materials is repelled to kiln center through the arc precoated plate inclined-plane of kiln body preheating zone, piece material glides along kiln wall and is trapped near kiln wall, make coal (burnt) stone raw material be mixed further, and form " the bottom of a pan " shape charge level.Thus effectively prevent " the kiln wall effect " that shaft furnace is intrinsic, reduce and even stopped the technology accidents such as the dross caused, inclined burning because limit wind is superfluous.
The drawing mechanism in this utility model kiln bottom portion, it is designed with a material distributing cone, material distributing cone equably the material at kiln center can be diverted to periphery thus realizes kiln in the uniform sinking of material, below material distributing cone, it is disposed with furnace bottom storage bin hopper and Calx can be unloaded by ash hoist equably, it is provided with kiln bottom transition feed bin and belt conveyor below ash hoist, in time Calx finished product is transported.
nullThe inventive point of this utility model maximum is: change the air inlet mode that lime shaft kiln is intrinsic，By traditional lime shaft kiln by kiln bottom air blast，Change into from kiln crown convulsion，And in order to strengthen the ventilation at kiln body center，Furnace bottom storage bin hopper surrounding in kiln bottom portion is equipped with 3-6 cooling wind guide duct，3-6 averaging wind pipe is arranged in furnace roof care feed tray surrounding，Averaging wind pipe is arranged over airtight ring-shaped flue and is connected with flue gas purification system and high-pressure suction fan，When high-pressure suction fan is in furnace roof convulsion，The cold air of furnace bottom is under the big draft effect of high-pressure suction fan，Kiln body cooling zone is entered through bed of material gap and the cooling wind guide duct of ash hoist and furnace bottom storage bin hopper，The most burned Calx is cooled down，Kiln discharge Calx temperature is made to be reduced to less than 80 DEG C，Cooling wind is heated simultaneously，The burning of fuel is participated in when arriving burning zone，The CO that combustion product and decomposition of limestone go out2Continue to move up, arrive preheating zone and carry out heat exchange with coal (burnt) stone raw material, limestone is made to be preheated, when heat smoke arrives kiln crown distribution device, the flue gas of care feed tray periphery is in the bed of material gap of care feed tray periphery rises to the ring-shaped flue of more than charge level, kiln body center flue gas in care feed tray lower cavity is then guided in the ring-shaped flue of furnace roof by averaging wind pipe, thus strengthen the ventilation at kiln body center, the flue-gas temperature arriving ring-shaped flue drops to less than 150 DEG C, is introduced in flue gas purification system by air-introduced machine.In lime manufacturing process, owing to whole furnace roof is in airtight negative pressure state, and it is provided with cooling wind guide duct and the averaging wind pipe of furnace roof of furnace bottom, under the big draft effect of high-pressure suction fan, greatly strengthen the ventilation at kiln body center, " kiln wall effect " that shaft furnace intrinsic can be effectively alleviated or avoided, reduces or stopped the technology accidents such as the dross caused, inclined burning because limit wind is superfluous.
Negative-pressure type lime shaft kiln of the present utility model, at boiler roof sealing, work under the negative pressure state that furnace bottom opens wide, when normally producing, air inducing is carried out by the high-pressure suction fan of furnace roof, realize ventilation and the heat exchange of furnace interior, and do not have ash-laden gas to enter air, fundamentally improve the dust pollution of kiln body periphery.Kiln inner top is equipped with fixed distribution device, bottom is equipped with uniform ash discharging gear, inside kiln body little in two, olive shape structure broad in the middle, kiln inner working face is smooth without faulting of slab ends, make coal (burnt) building stones mix homogeneously, air flow method is uniform, material is conducive to move down the most smoothly, thus " kiln wall effect " that shaft furnace intrinsic can be effectively alleviated or avoided, reduce or stopped the dross caused because limit wind is superfluous, the technology accidents such as inclined burning, good product quality and stable, by the accurate regulation of high-pressure suction fan parameter, can make kiln discharge flue-gas temperature below 150 DEG C, kiln discharge Calx temperature is below 80 DEG C, thus energy consumption is low, production environment is good, and the service life of refractory lining was up to more than 15 years.
Accompanying drawing explanation
Fig. 1 is that master of the present utility model cuts open schematic diagram；
Fig. 2 is the top view (without emission of baiting chute) of Fig. 1；
Fig. 3 is the A-A profile of Fig. 1；
Fig. 4 is the B-B profile of Fig. 1；
Fig. 5 is the C-C profile of Fig. 1.
nullIn figure，1 kiln body，2 furnace roof steel structure platforms，3 roof support beam，4 distribution devices，5 kiln body support platform，6 furnace bottom support beams，7 drawing mechanisms，8 preheating zones，9 burning zones，10 cooling zones，11 care feed trays，12 averaging wind pipes，13 transition feed bins，14 closed cover plates，15 emission of baiting chute，16 air valves，17 tremie pipes，18 ring-shaped flues，19 material distributing cones，20 furnace bottom storage bin hoppers，21 cooling wind guide ducts，22 ash hoists，23 furnace bottom transition feed bins，24 belt conveyors,25 fume pipes，26 flue gas purification systems，27 high-pressure suction fans，28 level-sensing devices，29 flue gas thermal resistances，30 Calx thermal resistances，31 flue gas exhaust stacks，32 flue gas diffusion valves，33 working linings，34 permanent liner，35 thermal insulation layers，36 preheating zone working linings，37 cooling zone working linings，38 burning zone working linings.
Detailed description of the invention
Embodiment 1
The present embodiment, as a example by 300 tons of negative-pressure type lime shaft kilns of daily output, explains in detail the technical solution of the utility model, but the present embodiment limits this utility model the most in any form.
See Fig. 1～5, the technical scheme of the present embodiment is: a kind of negative-pressure type lime shaft kiln, there is kiln body 1, the top of kiln body 1 is provided with furnace roof steel structure platform 2 and roof support beam 3, furnace roof steel structure platform 2 center is provided with distribution device 4, the bottom of kiln body is provided with kiln body and supports platform 5 and furnace bottom support beam 6, kiln body supports platform 4 center and is provided with drawing mechanism 7, preheating zone 8, burning zone 9, cooling zone 10 it is followed successively by from top to bottom inside kiln body, described kiln body vertical section is that two is little, olive shape structure broad in the middle, particularly:
Described distribution device 4 is made up of (specifically having 4 averaging wind pipes in the present embodiment) care feed tray 11 and 3～6 averaging wind pipes 12, and the upper end of averaging wind pipe 12 is fixed be connected with furnace roof steel structure platform 2 and roof support beam 3, and lower end is fixing with care feed tray 11 to be connected；Equipped with transition feed bin 13 above described distribution device 4, transition feed bin 13 top is equipped with closed cover plate 14, and the top of closed cover plate 14 is equipped with emission of baiting chute 15, and the external charging equipment of emission of baiting chute 15, equipped with air valve 16 on emission of baiting chute 15；Being provided with tremie pipe 17 bottom transition feed bin 13, tremie pipe 17 inserts certain depth in kiln, and arranges with averaging wind pipe 12 dislocation；Being provided with a ring-shaped flue 18 at transition feed bin 13 lower loop around transition feed bin 13, ring-shaped flue 18 upper end is tightly connected with the outer wall of transition feed bin 13, and lower end is tightly connected with furnace roof steel structure platform 2；
Described drawing mechanism 7 has material distributing cone 19, material distributing cone 19 is fixedly mounted in furnace bottom support beam 6, kiln body below material distributing cone 19 supports platform 5 center and is provided with furnace bottom storage bin hopper 20,4 cooling wind guide ducts are specifically had) in furnace bottom storage bin hopper 20 is uniformly distributed on peripheries with 3～6 cooling wind guide duct 21(the present embodiment, ash hoist 22 it is provided with below furnace bottom storage bin hopper 20, it is provided with furnace bottom transition feed bin 23 below ash hoist 22, below the excessive feed bin of furnace bottom 23, is provided with belt conveyor 24；
Described ring-shaped flue 18 side is also equipped with fume pipe 25 and is connected with flue gas purification system 26, the external high-pressure suction fan of flue gas purification system 26 27, high-pressure suction fan 27 is by furnace roof air inducing, the cold air making furnace bottom passes sequentially through the bed of material gap of furnace bottom and cooling wind guide duct 21, the cooling zone 10 of kiln body, burning zone 9, preheating zone 8 arrive furnace roof, enter ring-shaped flue 18 through furnace roof averaging wind pipe 12 and bed of material gap, empty after flue gas purification system 26 processes.
The dischargeable capacity of described kiln body 1 is 100～500m3, the most a height of 16～25m, top 5m～6m is preheating zone, and its internal diameter is the most upwards shunk with 70 ° of angles of ＞ by φ 2m～φ 6m, narrows down to φ 1.5m～φ 3m to preheating zone top internal diameter；Middle part 6m～10m is burning zone, and its internal diameter is φ 2m～the cylindrical shape of φ 6m；Bottom 5m～6m is cooling zone, and its internal diameter with 70 ° of angle retracted downward glossily of ＞, is narrowed down to φ 1.5m～φ 3m to cooling zone bottom inner diameter by φ 2m～φ 6m, forms small at both ends and big in the middle olive shape kiln body longitudinal plane structure.
In the present embodiment, the dischargeable capacity of concrete kiln body 1 is specially 430m3, effective a height of 22m, top 6m are preheating zone 8, and its internal diameter is the most upwards shunk with 70 ° of angles of ＞ by φ 6m, narrows down to φ 2m to preheating zone 8 top internal diameter；Middle part 10m is burning zone 9, and its internal diameter is the cylindrical shape of φ 6m；Bottom 6m is cooling zone 10, and its internal diameter with 70 ° of angle retracted downward glossily of ＞, is narrowed down to φ 2m to cooling zone 10 bottom inner diameter by φ 6m, forms small at both ends and big in the middle olive shape kiln body longitudinal plane structure.
Being also equipped with level-sensing device 28 above described transition feed bin 13, arrange upper and lower two Level control lines in transition feed bin 13, described level-sensing device 28 is radar type level-sensing device or Plumb-bob Material Level Meter.In the present embodiment, the dischargeable capacity of transition feed bin is 20m3, coal (burnt) stone compound 30 tons (hour charge of the negative-pressure type lime shaft kiln producing 300 tons daily is 25 tons) in transition feed bin, can be stored.
The tremie pipe 17 of described transition feed bin 13 is positioned at center, kiln crown portion, is all in charge of 12 and arranges around tremie pipe 17 surrounding.
Described ring-shaped flue 18 is built with flue gas thermal resistance 29 for measuring the temperature of furnace roof flue gas, and furnace bottom storage bin hopper 20 bottom is used for measuring the temperature of finished product Calx equipped with Calx thermal resistance 30；The air feed of described kiln body 1 and flue gas purification system 26 share a high-pressure suction fan 27 with frequency control machine, and the frequency control machine of high-pressure suction fan 27 regulates the suction air volume of high-pressure suction fan according to furnace roof flue-gas temperature and furnace bottom Calx temperature；The wind flow of high-pressure suction fan 27 feeds the fuel in kiln simultaneously and burns completely the required air quantity supply with Calx cooling air volume, and the CO that combustion product and decomposition of limestone go out in also meeting the unit interval2Discharge Deng waste gas；The total head of high-pressure suction fan 27 is higher than bulk cargo layer resistance in kiln, by the tube side resistance of kiln crown to flue gas purification system 26 and flue gas purification system body resistance sum.
Equipped with flue gas exhaust stack 31 on described fume pipe 25, equipped with flue gas diffusion valve 32 on described flue gas exhaust stack 31.
Described kiln body 1 is followed successively by working lining 33, permanent liner 34, thermal insulation layer 35 from the inside to the outside, described preheating zone working lining 36 and cooling zone working lining 37 are to use three grades of high aluminas or clayey castable refractory pre-formed, and burning zone working lining 38 is to use two grades of high aluminas or one-level High-Alumina castable refractory pre-formed；Described prefabricated section height is that 300-500mm is contour, and radial dimension is that 350-500mm is isometric, and radian presses prefabricated component size, every ring 24-36 block etc. point 360 °, prefabricated component uses lifting to build by laying bricks or stones, and in making kiln, the concentricity of each transverse section is highly consistent, and kiln inner working face is smooth without faulting of slab ends.
In the present embodiment, kiln body preheating zone working lining 36 and cooling zone working lining 37 specifically use three grades of High-Alumina castable refractories pre-formed, burning zone working lining 38 uses two grades of High-Alumina castable refractories pre-formed, permanent liner 34 uses the casting material prefabricated molding of clayey, the height of prefabricated section is that 350mm is contour, radial dimension is that 345mm is isometric, and radian divides 360 ° by 30 pieces of grades of every ring.
Claims (7)
1. a negative-pressure type lime shaft kiln, there is kiln body, the top of kiln body is provided with furnace roof steel structure platform and roof support beam, furnace roof steel structure platform center is provided with distribution device, and the bottom of kiln body is provided with kiln body and supports platform and furnace bottom support beam, and kiln body supports platform center and is provided with drawing mechanism, preheating zone, burning zone, cooling zone it is followed successively by from top to bottom inside kiln body, described kiln body vertical section is small at both ends and big in the middle olive shape structure, it is characterised in that:
Described distribution device is made up of care feed tray and 3～6 averaging wind pipes, and the upper end of averaging wind pipe is fixing with furnace roof steel structure platform and roof support beam to be connected, and lower end is fixing with care feed tray to be connected；Equipped with transition feed bin above described distribution device, transition feed bin top is equipped with closed cover plate, and the top of closed cover plate is equipped with emission of baiting chute, and the external charging equipment of emission of baiting chute, equipped with air valve on emission of baiting chute；Transition bin bottom is provided with tremie pipe, and tremie pipe inserts certain depth in kiln, and arranges with averaging wind pipe dislocation；Being provided with a ring-shaped flue at transition feed bin lower loop around transition feed bin, ring-shaped flue upper end is tightly connected with the outer wall of transition feed bin, and lower end is tightly connected with furnace roof steel structure platform；
Described drawing mechanism has material distributing cone, material distributing cone is fixedly mounted in furnace bottom support beam, kiln body below material distributing cone supports platform center and is provided with furnace bottom storage bin hopper, it is uniformly distributed on peripheries with 3～6 cooling wind guide ducts at furnace bottom storage bin hopper, it is provided with ash hoist below furnace bottom storage bin hopper, it is provided with furnace bottom transition feed bin below ash hoist, below the excessive feed bin of furnace bottom, is provided with belt conveyor；
Described ring-shaped flue side is also equipped with fume pipe and is connected with flue gas purification system, the external high-pressure suction fan of flue gas purification system, high-pressure suction fan is by furnace roof air inducing, the cold air making furnace bottom passes sequentially through bed of material gap and cooling wind guide duct, the cooling zone of kiln body, burning zone, the preheating zone arrival furnace roof of furnace bottom, enter ring-shaped flue through furnace roof averaging wind pipe and bed of material gap, empty after flue gas purification system processes.
A kind of negative-pressure type lime shaft kiln the most according to claim 1, it is characterised in that: the dischargeable capacity of described kiln body is 100～500m3, the most a height of 16～25m, top 5m～6m is preheating zone, and its internal diameter is the most upwards shunk with 70 ° of angles of ＞ by φ 2m～φ 6m, narrows down to φ 1.5m～φ 3m to preheating zone top internal diameter；Middle part 6m～10m is burning zone, and its internal diameter is φ 2m～the cylindrical shape of φ 6m；Bottom 5m～6m is cooling zone, and its internal diameter with 70 ° of angle retracted downward glossily of ＞, is narrowed down to φ 1.5m～φ 3m to cooling zone bottom inner diameter by φ 2m～φ 6m, forms small at both ends and big in the middle olive shape kiln body longitudinal plane structure.
A kind of negative-pressure type lime shaft kiln the most according to claim 1, it is characterised in that: being also equipped with level-sensing device above described transition feed bin, arrange upper and lower two Level control lines in transition feed bin, described level-sensing device is radar type level-sensing device or Plumb-bob Material Level Meter.
A kind of negative-pressure type lime shaft kiln the most according to claim 1, it is characterised in that: the tremie pipe of described transition feed bin is positioned at center, kiln crown portion, divides equally pipe ring and arranges around tremie pipe surrounding.
A kind of negative-pressure type lime shaft kiln the most according to claim 1, it is characterised in that: described ring-shaped flue is built with flue gas thermal resistance for measuring the temperature of furnace roof flue gas, and furnace bottom storage bin hopper bottom is used for measuring the temperature of finished product Calx equipped with Calx thermal resistance；The air feed of described kiln body and flue gas purification system share a high-pressure suction fan with frequency control machine, and the frequency control machine of high-pressure suction fan regulates the suction air volume of high-pressure suction fan according to furnace roof flue-gas temperature and furnace bottom Calx temperature；The wind flow of high-pressure suction fan feeds the fuel in kiln simultaneously and burns completely the required air quantity supply with Calx cooling air volume, and the CO that combustion product and decomposition of limestone go out in also meeting the unit interval2Discharge Deng waste gas；The total head of high-pressure suction fan is higher than bulk cargo layer resistance in kiln, by the tube side resistance of kiln crown to flue gas purification system and flue gas purification system body resistance sum.
A kind of negative-pressure type lime shaft kiln the most according to claim 1, it is characterised in that: equipped with flue gas exhaust stack on described fume pipe, equipped with flue gas diffusion valve on described flue gas exhaust stack.
A kind of negative-pressure type lime shaft kiln the most according to claim 1, it is characterized in that: described kiln body is followed successively by working lining, permanent liner, thermal insulation layer from the inside to the outside, described preheating zone working lining and cooling zone working lining are to use three grades of high aluminas or clayey castable refractory pre-formed, and burning zone working lining is to use two grades of high aluminas or one-level High-Alumina castable refractory pre-formed；Described prefabricated section height is that 300-500mm is contour, and radial dimension is that 350-500mm is isometric, and radian presses prefabricated component size, every ring 24-36 block etc. point 360 °, prefabricated component uses lifting to build by laying bricks or stones, and in making kiln, the concentricity of each transverse section is highly consistent, and kiln inner working face is smooth without faulting of slab ends.
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| CN201620456749.1U CN205740770U (en) | 2016-05-19 | 2016-05-19 | A kind of negative-pressure type lime shaft kiln |
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| CN201620456749.1U CN205740770U (en) | 2016-05-19 | 2016-05-19 | A kind of negative-pressure type lime shaft kiln |
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| CN201620456749.1U Expired - Fee Related CN205740770U (en) | 2016-05-19 | 2016-05-19 | A kind of negative-pressure type lime shaft kiln |
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| CN (1) | CN205740770U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105776905A (en) * | 2016-05-19 | 2016-07-20 | 大冶市环宇钙业科技有限公司 | Negative-pressure lime shaft kiln |
| CN109437608A (en) * | 2018-11-09 | 2019-03-08 | 余松涛 | A kind of two-way wind built-in heat exchanger lime shaft kiln and its method for calcinating |
| CN111322866A (en) * | 2020-03-04 | 2020-06-23 | 高原晨曦 | Gasification and calcination device for low-calorific-value materials |
| CN112524958A (en) * | 2021-01-15 | 2021-03-19 | 广西柳钢新材料科技有限公司 | Negative pressure air inlet cooling device for suspension cylinder of Maerz kiln |
-
2016
- 2016-05-19 CN CN201620456749.1U patent/CN205740770U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105776905A (en) * | 2016-05-19 | 2016-07-20 | 大冶市环宇钙业科技有限公司 | Negative-pressure lime shaft kiln |
| CN105776905B (en) * | 2016-05-19 | 2017-11-24 | 大冶市环宇钙业科技有限公司 | A kind of suction type lime shaft kiln |
| CN109437608A (en) * | 2018-11-09 | 2019-03-08 | 余松涛 | A kind of two-way wind built-in heat exchanger lime shaft kiln and its method for calcinating |
| 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 |
| CN111322866A (en) * | 2020-03-04 | 2020-06-23 | 高原晨曦 | Gasification and calcination device for low-calorific-value materials |
| CN112524958A (en) * | 2021-01-15 | 2021-03-19 | 广西柳钢新材料科技有限公司 | Negative pressure air inlet cooling device for suspension cylinder of Maerz kiln |
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