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Active Lime Equipment

Active Lime Process Flow Chart

Active Lime Process Flow Chart

At present,the domestic larger steel companies adopt rotary kiln system to produce active lime for steel smelting such as Bao Gang,Wu Gang,Ji Gang, Tai Gang,Sha Gang,An Gang, etc.In the carbide industry,due to larger fluctuation of oil prices international,the rapid development of China's PVC has been transformed from ethylene production to the calcium carbide etylene,with high activity of calcium carbide lime,it shortens smelting time,high-grade calcium carbide,and low power consumption,in particular,the power consumption of calcium carbide smelting reaches 3300-4000kw/h,and with a high active lime kiln production per ton of calcium carbide smelting saving 5 to 10%. Thus,large and medium enterprises building advanced chloral-alkali chemical activity of lime kiln production lime is necessary,meanwhile,bringing in great national economic and social benefits.
The successful industry application of environment-friendly,energy-saving active lime stone with vertical preheated and vertical cooler breaks traditional pattern of lime production.Due to reduction of fuel consumption significantly and reducing exhaust emissions,coupled with the adoption of pulse-packs dust-catcher purity exhausting,not only makes production cost and the energy consumption greatly reduced,but also the calcinations process of emission slandered,environment condition is kept substantially.

Main advantages of Active Lime Process Flow Chart:
1.Good quality,and high output,suitable for larhbe-scale activity of lime production lime and large-scale production.
2.Stable production,all the production with the negative pressure,air flow and higher security.
3.Simple structure,easy control and beneficial operation and maintenance.
4.Fine grade limestone can be calcined,full use of mine resources.
5.Low heat consumption per unit of product,installation in vertical kiln can take advantages of exhaust warm limestone,greatly reducing the fuel consumption.
6.Making full use of industrial waste gas as a fuel for lime burning(such as blast furnace exhaust gas,acetylene tail gas,charcoal blue exhaust,etc.)
7.Kiln head adopts the design of vertical cooler integrating kiln head cover, The construction area is small,good sealing,
8.Environment protection,the adoption of pulse bag filter collecting dust,discharge concentration less than 50mg/Nm3 and below national emission standard(less than 100mg/Nm3).
9.High automation level,the adjustment of production system operation,control and alarm.

Active Lime Process Flow Chart

1.Vertical preheater
Low voltage drop preheater,smoke in the preheater,reduce the resistance losses, reduce power consumption .From the high temperature ,hot flue gas inlet,directly through the material layer,and limestone fully preheated temperature heat, limestone can reach 900℃,about nearly 30% of limestone decomposition,emissions than 270℃ temperature.
Adopts hydraulic push rod feeding to kiln.
Preheater coping with the bunker material level program control,the ultrasonic material level plan,ecr realize material level discretion alarm,interlocking feeding system,ensure preheater material layer highly stable.Preheater adopts hanging brick outside except the top ,the rest part adopts the fire-resistant pour families,brick  type is less ,masonry is simple.
Preheater sports equipment is less,equipment maintenance is small.
2.Rotary kiln
Adopt thick short type rotary kiln,Such as diameter 3.5m,kiln long 55m,saves the land.
Adopt speed motor drive kiln body,and is equipped with auxiliary motor,stable work,regulate  flexibly.
With spring of preheater sealing structure,simple,reliable and  the seal effect is good.
3.Prependicular type cooler
Cooler is divided into four regions,and can control alone.
Cooling wind  and heat materials contact directly and  cooling effect is good,the gray temperature higher than the environment temperature about 80℃,secondary air temperature can be preheated about above 600℃ ,beneficial to the roasting.Cooler has no moving parts,equipment maintenance less.
4.By four-channel coal combustion pulverized coal burners(pulverized coal tube)
Four-channel coal burner device,is a big speed difference in the cement industry new burner,can be widely used.Using the principleof coincidental association flow has big speed difference,speed and angle of pulverized coal ejective adjustment,form in the area of the burner center,can promote second negative pressure area fully mixing wind and the coal,coal extremely block heats up,reach ignition temperature.
Once,about 8% less air combustionair quantity of theory;Coal in wind in nozzle out about 25-speed 35m/s; Spin in LiuFeng on the nozzle out approximately 120-speed 180m/s; Dc wind on the nozzle of the jet speed in 200m/s for 140-;Center for a wind of qir volume air about 2-6%.
5.End of waste gas treatment using LCM type long bag impulse precipitator.
The advantage of the filter bag for LCM type long bag impulse precipitator integrate points room counter blowing and pulse ash blowing clear , lengthen the compressed air power, play full role of blowing out dust to prevent dust control and attached again,so as to improve the filtering velocity,saving energy,extend out dust filter bag life effect.
The flame shape can be adjusted flexibly,to adapt to the roasting need plume lime.
The adaptability of coal,flam mable inferior coal.
Calcination won't be partial fire and brush kiln skin.

Technical parameters of Active Lime Process Flow Chart:
Design capability
(t/d)
150 200 250 300 350 400 500 600 750 800 1000
Product Active lime Light heat dolomite Active lime Light heat dolomite Active lime Light heat dolomite Active lime Light heat dolomite Active lime Active lime Active lime Active lime Active lime Active lime Active lime
Preheater Vertical Round Prehe
ater
Vertical Round Prehe
ater
Vertical Round Prehe
ater
Vertical Round Prehe
ater
Vertical Round Prehe
ater
Vertical Round Prehe
ater
Vertical Round Prehe
ater
Vertical Round Prehe
ater
Vertical Polygon Prehe
ater
Vertical Polygon Prehe
ater
Vertical Polygon Prehe
ater
Rotary Kiln Standards(m) 2.4×40 2.8×43 3×50 3.2×50 3,3×55 3,6×55 3.8×58 4×60/4.2×50 4.3×60 4.3×65 4.8×68
Effective volume(m3) 142 190 235 292 390 430 505 575/548 670 738 1005
Burning temperature(℃) 1350/
1250
1350/
1250
1350/
1250
1350/
1250
1350 1350 1350 1350 1350 1350 1350
Cooling Vertical round cooler Vertical round cooler Vertical round cooler Vertical round cooler Vertical round cooler Vertical square cooler Vertical square cooler Vertical square cooler Vertical square cooler Vertical square cooler Vertical square cooler
Fuel coal gas Coal fine coal gas Coal fine coal gas Coal fine coal gas Coal fine coal gas Coal fine coal gas Coal fine coal gas Coal fine coal gas Coal fine coal gas Coal fine coal gas Coal fine coal gas Coal fine
Heat Rate(kj/kg CaO) 5300/
5000
5300/
5000
5300/
5000
5300/
5000
5300/
5000
5225 5100 5100 4810 4810 4810

Active lime process mainly include:Stone-crushing Equipment System---->Lime Burning System ---->Fule Equipment Burning System ---->Transmission and Distribution System ---->Environmental Protection Dust Removal and Store Material System

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