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LIME VERTICAL KILN







Technical Data

 

Capacity: 50-500(t/d)

 

Fuel: Mixed Fuel,Gas

 

Limestone Size: 30~60/40~80(mm)

 

Application: Active lime palnt

 

ADVANTAGE

1. This kiln is flexible in operation and can be adjusted within 60-100%, all can achieve the stable operation.

 

2. Applicable fuels are solid fuels such as coke and anthracite etc..

 

3. Low heat consumption, reasonable usage of heat energy, and the secondary high-temperature air generated by the lime preheating can be directly used for burning purpose, thus make full use of the heat value. The energy consumption can be as low to 140 kg of standard coal per ton lime product. 

 

4. The vertical kiln adopts micro-negative pressure operation (the top of the kiln), so that the air flow in the kiln is evenly distributed which is conductive to the limestone calcination. 

INTRODUCTION

Vertical lime kiln, just like its name, the shape is erect. It is used for calcination limestone. Due to has low energy consumption, less cover area, less investment, wide applicability fuel, and more advantages, the vertical lime kiln is also widely used in metallurgy, construction materials, calcium carbide, Nanometer calcium carbonate, aerated concrete, sugaring, etc.

SPECIFICATIONS

Capacity (t/d) 50 100 150 200 300 400
Main Equipment Main supporting equipment models and technical & economic indicators
Distributor BL-1 BL-2 BL-2 BL-3 BL-3 BL-4V
Vertical Kiln 60m³ 150m³ 200m³ 250m³ 400m³ 500m³
Kiln Chamber Section Form Round
Lime Discharging Device WF-1 WF-2 WF-2 WF-3 WF-4 WF-5
Calcination Temp. /℃ 1100±50
Energy Consumption Index /(kCal/kg Lime) 950±50
Power Consumption Index  /(kW·h/t Lime) 25±5
Limestone: Lime 1.6~1.75:1
Light & Over Burnt Rate /% ≤13
Lime Activity /ml 220~280(depends on the composition of limestone)
Lime Discharging Temperature /℃ Ambient Temperature+60
Limestone Feeding Size /mm 30~80/80~120
Emission concentration /(mg/Nm3) ≤30
Working Days / Days Per Year ≥340
Overhaul Cycle/Year 3~5
Labor/Shift 2
Applicable Fuels Lump Anthracite, Lump Coke, Lump Petroleum Coke, Lump Biomass Fuel, etc.

 

PROCESS

In order to guarantee the quality and capacity of lime, finalize the fully automatic production during the production, the special and main equipment for the kiln as follows:

 

1.Limestone batching electric weighing system

Required limestone and coal mixed as the feeding material in the kiln processing. The ratio of two mixed material is very important, the two weighing system can accurately measure the raw material quality, and mix them with special batching method. In addition, if any changeable in particle size of raw material or calorific value of coal, should adjustable the ratio of two raw material, operation the computer will finalized in control room.

 

2.Intelligent master controller

Main winch system, make the rotation motor change into frequency control of motor speed. During the handcart route from feeding to 0 ~ 6 m after adopt step-less speed 6 m is set to 1 m/s running smoothly, terminal schedule 6 m for step-less speed running ahead of time, until discharge. This design ensures the skip smooth operation, greatly reduce the vibration and the failure rate of inclined bridge. The elevating capacity will improve 60% than no frequency control of motor speed. Make the main winch system greatly reduced maintenance. The handcart running status and adjustment wire rope length no more downtime. Practical life of wire rope improve more than 3 times.

 

3.Rotary distributing devices

The key of feed material inside kiln ensure the uniform flat, rotary distributing devices could make the raw material even scattering into the material surface, the shape of surface is adjustable. Application of frequency conversion governor, PLC control, makes the fabric are accurate and reliable.The case of the key structure, such as cylinder, baffle, cloth guide groove, and tablets, etc. With high temperature resistant, corrosion resistant stainless steel. Rotating parts with special high temperature resistant surface bearing, makes the equipment operation and reliable, and can in a terrible environment without any medium. For the high quality of the calcined limestone provides a good technological conditions.

The special structure of the case after mixing limestone and coal can be scattered to the material surface. Greatly reduced due to uneven fabric in furnace nodules, waste of fuel. Like Shuicheng steel, Jinan steel and other units in the replacement after this kind of case, after the measured production ash per ton coke saving (or coal) in more than 15 kg.

 

4.Intelligent detection of material level gage

Level gage install the top of kiln, though remote control in the industrial control can be very convenient to detect a material fabrics, to control to determine whether the skip loading, lime discharge device is working.

Detection of material level gage part adopts high temperature (above 600 ℃) corrosion resistant materials. Control system adopts imported transducer and PLC module, in order to meet the measurement system can long-term reliable operation in harsh environment.

 

5.Simulation hood

Active lime vertical kiln in the calcination process, for the size of the wind and uniformity, the degree of the activity of lime and calcined raw cooked evenness is important.The hood cap is to use the computer simulation design. It can make for uniform wind. The furnace condition caused by uneven air supply partial burn, over burnt, less burnt phenomenon is greatly reduced, greatly improving the quality of active lime. In addition, because of the special structure, hood it than other cap to avoid blowing ash up clogging gas path and influence the furnace condition. At the same time also cap ash discharge smoothly than others. In the rough supply environment, it also has properties, such as pressure and resistance to high temperature deformation.

 

6.Pan discharging lime machine

This equipment is mainly composed of motor, reducer, transmission shaft, rotary blade, and other parts.

 

7.Two section seal valve lime discharging machine

 

 

If you are interested in our product design, specification, spare parts, quotation etc, please feel free to contact us by WhatsApp +8618037866379, or email us at zkeqpt@zkcorp.com.

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Qiaoloucaizhai industrial park, XingYang, Zheng Zhou, Henan, China

WhatsApp +8618037866379
Email zkeqpt@zkcorp.com