What is the maximum thermal efficiency of energy-saving and environmentally friendly lime kilns
In the field of lime production, thermal efficiency is the core index to measure the progressiveness of technology and the level of environmental protection and energy conservation. Traditional earthen kilns or simple equipment generally have low thermal efficiency, and a large amount of thermal energy is wasted. Modern energy-saving and environmentally friendly lime kilns have significantly increased this number through technological innovation.
At present, the most advanced energy-saving and environmentally friendly lime kilns, such as rotary kilns or double chamber vertical kilns with multi-stage preheaters and coolers, theoretically have a maximum thermal efficiency of 85% or even higher. This is a quite astonishing level, which means that the vast majority of the heat generated by fuel combustion is effectively used for the decomposition reaction of limestone, greatly reducing the energy consumption and carbon emissions per unit product.
The achievement of this outstanding performance relies on a series of comprehensive technologies: using a preheater to recover flue gas waste heat to preheat raw materials, using a cooler to recover the sensible heat of high-temperature lime to heat the combustion air, and using an intelligent control system to accurately optimize the calcination temperature, air volume ratio, and residence time.
The pursuit of higher thermal efficiency is the goal of sustainable development in the industry. It not only directly reduces the production costs of enterprises, but also responds to the national "dual carbon" strategy and promotes the key practice of industrial green transformation. Therefore, investing in and promoting such efficient lime kiln technology has significant economic benefits and far-reaching environmental significance.
