Beam Type, Fercalx Type Vertical Lime Kiln

الوصف

Beam type lime kiln is one of our main products, it is the new generation of Terruzzi Fercalx Vertical Lime Kiln. Based on summarizing the domestic kilns operation, we have further improved and optimized the combustion technology by combining of three patens of ridge type burner beam, burner-beams reversed layout lime calcining process, as well as the flameless combustion technology. This type kiln structure is simple and less special-shaped refractory brick. Relatively to other kilns, it is simple masonry, convenient construction; low heat consumption, high activity, low rate of under-burnt and over-burnt, strong fuel adaptability, simple equipment, low operation failure rate, high operating flexibility, small occupation area, less investment, and high performance cost ratio.

Technical Characteristics
  The facility is equipped with advanced PLC control system with a monitoring system, so that the beam type vertical kiln production is more stable, and easier to operate.
  Beam type vertical kiln is in negative pressure operation, it's conducive to safe production and environmental compliance.
  It adopts the ridge type burner beam (our patent technology), so that the raw material runs more smoothly.
  Product discharging valve is installed in the elbow between the upper suction beam and plenum chamber (air gathering box), which can prevent pipes clogging.
  the structure of the burners around the kiln is improved, the number also increases, which will lead more evenly heat division and more completely burning, so that be effectively to control the under burnt and over burnt.
  The production capacity is flexible and adjustable; the adjustment range is *****0%.
  Applied to many kinds of fuels: natural gas, coal, calcium carbide furnace gas, coke oven gas, mixed gas, blast furnace gas (calorific value ≥**0 kcal / m3) or mixed fuel of pulverized coal and coal gas.
  the finished product has high activity, low under-burnt and over-burnt, and low residual amounts of carbon dioxide;

Structural Features of Beam Type lime Vertical Kiln
1, The kiln body is quasi-rectangular. From the top to the bottom, there are the material storage zone, preheating zone, calcining zone, homogeneous calcining zone, and cooling zone.
2,Adopting two layers burner beams is the technology key and core section of the kiln body, the burner beam is cooled by the HTF jacket. According to the production capacity, there are different amount burner beams of two layers layout in the calcining zone, and several adjustable burner mouths are arranged in each beam. The upper and lower burner beams are dislocation arrangement, in order to distribute the heat to be maximal even. In all the calcining zone, there are reasonably distributed burners, and each burner responses only small burning space, so the heat conduction way is mainly radiation, and convection heat conduction as auxiliary, which ensures the heat penetration ability to the raw material is strong, the limestone can be burned through, so the rate of over-burnt and under-burnt, high activity is ensured.
3,In order to protect the high temperature burner beams, the cooling medium (usually heat -conduction oil) passes through inside of the beam sandwich, the cooling medium is pump driven in continuous circulation, to ensure safe and reliable operation of the burner beams.

Performance
    Daily output: **0 tons to **0 tons, the flexibility arrange: *0%***0%
    Limestone size: ****0mm or ****0mm, (large, small granularity ratio 1: 2)
    Fuel: natural gas, coal, calcium carbide furnace gas, coke oven gas, mixed gas, blast furnace gas (calorific value ≥**0 kcal / m3) or mixed fuel of pulverized coal and coal gas.
    Heat consumption: between **0~**0kcal/kg lime
    power consumption: *5Kwh/t lime
Lime quality: the activity ≥******0, the rate of under-burnt and over-burnt≤8%
 
 
Girder Burner Beam (Patent ZL***0 2 ******4.4).
 
 
 
According to the experience of former beam type lime kilns factories, the former T type burner beam life time is very short because of its "T" eaves was eroded by the flame and coke powder. We developed heat-insulation burner beams which is compound of refractory and steel structure, and improves the utilization lifetime. Besides, we developed girder burner beam by multiple test.
 
Its top likes a girder structure, which eliminates the material accumulation of the traditional flat top, and avoids the materials on the beam calcined in a longer time which would lead nodulation. The girder burner beam can make the material move down smoothly, and can play the role of turning material more effectively, so the lime calcination will be more uniform.  The flame direction of the girder burner beam is down. Even a small amount of the coke powder in the air fuel reflects to the beam against the raw material, because the amount is small, and the friction velocity decreases a lot, so it's not enough to cause damage to the girder body, which also greatly prolongs the service life of the burner beam.
 
 
 
Reverse Layout Calcining Process
 
(Patent ZL***4 2 ******7.0).
 
In the traditional lime kiln calcining process, the upper burners' power is higher than the lower burners' power, and we could know through the following experimental data analysis:
 
Limestone calcination time has a direct relationship with the calcination temperature, the higher the calcination temperature of the same limestone particle size is, and the shorter the calcination time need. And the lime's thermal conductivity is less than limestone; the deeper the heat goes through the limestone internal, the harder CO2 evolutes, so limestone internal needs more high temperature and heat.
 
But the thermal distribution of the traditional lime kiln is that the upper power is more than the lower power, when the limestone goes through the upper calcination layer, the decomposition is on the surface, only moving into the lower layer, the decomposition is on the core, and more thermal energy is needed. But the lower calcination power is low, which is inconsistent with the lime calcined demand.
 
Thereverse layout calcining process designed by SHD Thermal is according to the heat demand of limestone calcination to reallocate the burners power of both upper layer and lower layer, which is meant to the upper burner beams are more than the lower burner beams.
 
Combined with our girder type beam technology, the lower girder beam can be more close to the operation layer of kiln inside wall, which can reduce the material thickness between edge beams and kiln wall operation layer, which also reasonably allocate the calcining zone in the condition of canceling the surrounding burners configuration, so that the thermal energy distribution is more even, meets the demand to reduce the rate of over-burnt and under-burnt.  
 

• Daily Output: **0 Tons to **0 Tons, The Flexibility : *****0%
• Limestone Size: ****0mm or ****0mm, (Large, Small 1:2)
• After-Sales Service Provided: Engineers Available to Service Machinery Overseas
• Fuel: Gas, Coal, Blast Furnace Gas≥**0 Kcal / M3
• Heat Consumption: *5kwh/T Lime, or *5kwh/T Lime
• Lime Quality: Activity******0, Under-Burnt Over-Burnt Less 8%
• Export Markets: Global