50t/D Enverinomental Friendly Double-Chamber Shaft Kiln
Double-Chamber Shaft Kiln Introduction:
The double-chamber heat storage shaft kiln is commonly called Maerz
kiln. Compared with other lime kilns, it has the lowest heat
consumption, high activity of calcined lime and low residual carbon
dioxide.
Other Name: Maerz Kiln:
The double-chamber heat storage shaft kiln is commonly called Maerz
kiln. Compared with other lime kilns, it has the lowest heat
consumption, high activity of calcined lime and low residual carbon
dioxide.
Our Advantages of Double-Chamber Shaft Kiln:
1. High heat utilization rate: Due to the heat storage heat
exchange system, high-temperature exhaust gas is discharged through
the preheated kiln, and after a long time of heat exchange, the
heat is transferred to the material, and the waste heat is fully
utilized, thus achieving the purpose of energy saving . The heat
consumption per unit product can reach 850kcal/kg, double-chamber
shaft kiln is relatively low among all existing kiln types;
2. The exhaust gas temperature and dust content are low: the
exhaust gas temperature is very low due to the sufficient heat
exchange between the exhaust gas and the material, the exhaust gas
temperature is 90-130°C under normal conditions, and the dust
concentration in the exhaust gas is generally 5-8g/m³ ,
double-chamber shaft kiln is easy to take waste gas purification
treatment measures, which is beneficial to reduce environmental
pollution;
3. Convenient quality inspection: There are 2×8 quality inspection
doors under the double-chamber shaft kiln, and the fuel supply of
the corresponding burner can be adjusted to ensure the quality by
checking the product quality of each part;
Double-Chamber Shaft Kil Technical Parameters:
| No | Project Name | Parameter value |
| 1 | Lime Grade | Premium |
| 2 | Capacity,T/D | ≥600 |
| 3 | Calcining thermal principle | Cocurrent calcination and countercurrent heat transfer |
| 4 | Lime activity,ml | ＞350 |
| 5 | Raw material size,mm | 40～80 |
| 6 | Fuel type | Gas |
| 7 | Average fuel consumption | ～2616Nm³/h· Set |
| 8 | Fuel calorific value | 8600kcal/Kg |
| 9 | Operating days per year | 335 Days |
| 10 | Calendar job rate | 94％ |
| 11 | Heat consumption per unit product | ≤850KCal/kg |
| 12 | Power consumption per unit product (main equipment) | 45kW·h/t |
| 13 | Power consumption per unit product (comprehensive power
consumption) | 55kW·h/t |
| 14 | Product CO2 residual amount | ≤1.5% |
| 15 | Product CaO content | ≥90% |
| 16 | Exhaust dust concentration | ≤30mg/Nm3 |
| 17 | Area | —— |
Process Characteristics of Double-Chamber Shaft Kiln:
The stone is loaded from the top of the kiln, and the fuel is fed
into the upper part of the double chamber shaft kiln. The spray
guns located at the bottom of the pre-tropical zone are evenly
distributed across the section of the double chamber shaft kiln.
The combustion-supporting air is fed from the upper part of the
double chamber shaft kiln. The combustion-supporting air is
preheated in the preheating zone before mixing with the fuel, and
then the calcining flame gas flows through the calcining zone and
flows co-currently with the ore to obtain the ore. The calcined
waste gas is discharged to the top of the kiln along the preheating
belt of the other kiln through the passage connecting the two
kilns. Due to the long process of parallel calcination, the lime
quality is very good, and due to the alternate operation of the two
kilns, the waste gas directly preheats the ore, and the heat is
fully utilized, so the unit heat consumption is lower in various
kilns.
