What are the quality requirements for equipment in modern lime kilns
To achieve efficient, environmentally friendly, and stable production in modern lime kilns, the requirements for equipment quality can be described as "stringent". From the kiln structure to the core components, every link must withstand the test of high temperature, high pressure, and long-term operation.
As the core container, the kiln body must adopt a double-layer refractory composite structure. The outer layer is made of high-strength alloy steel shell, and the inner layer is composed of high alumina bricks and lightweight insulation bricks, which can withstand sustained high temperatures above 1250 ℃ while reducing heat loss. For example, the concentric double-layer design of a rotary kiln forms a circular calcination channel between the inner and outer cylinders, with a thermal efficiency of over 85%. This requires the refractory material to have thermal shock stability exceeding 15 cycles.
The burner is the key to thermal energy conversion. The new low nitrogen burner controls nitrogen oxide emissions below 80mg/m ³ through fuel staged injection and flue gas recirculation. The nozzle needs to adopt fluid dynamics optimization design to ensure uniform mixing of fuel and air, stable flame temperature field, and avoid local overheating causing damage to the kiln body.
Environmental protection equipment requires even more 'zero tolerance'. The bag filter must use PTFE coated filter material, with a removal rate of 99.9% for PM2.5; The desulfurization system needs to achieve a SO ₂ emission concentration of ≤ 35mg/m ³. These indicators require equipment materials to have strong corrosion resistance and sealing properties, and any leakage may lead to excessive emissions.
The equipment quality of the new lime kiln directly determines the energy consumption, output, and environmental compliance of the production line. Only by selecting high-quality materials with high strength, high temperature resistance, and corrosion resistance, combined with precision manufacturing processes, can the equipment maintain stable performance during long-term operation.
