What are the advantages of environmentally friendly lime kiln and vertical kiln technology
As a green equipment in the field of lime production, environmentally friendly lime kiln shaft kiln has demonstrated significant advantages in efficiency, environmental protection, cost and other dimensions with its unique structure and technical design, making it the preferred choice for small and medium-sized lime enterprises to transform.
Firstly, it has outstanding characteristics of high efficiency and energy conservation. The vertical kiln adopts a vertical structure, with materials moving from top to bottom and hot air flow exchanging heat in reverse from bottom to top. The heat utilization rate reaches over 75%, which is 20% -30% more energy-efficient than traditional kiln types; Equipped with a precise temperature control system, the calcination temperature can be adjusted according to the composition of limestone (usually controlled at 900-1100 ℃), reducing over burning or under burning, and stabilizing the active lime content in the finished product at over 85%, improving product quality.
Secondly, the environmental indicators have strong compliance. Technologically integrated with low nitrogen burners and desulfurization and dust removal devices, the nitrogen oxide emissions during combustion are less than 30mg/m ³, and the dust emission concentration is ≤ 10mg/m ³, in compliance with the latest national environmental protection standards; Some vertical kilns also add exhaust gas waste heat recovery systems to convert high-temperature exhaust gas into hot water or steam for workshop heating or auxiliary production, achieving a "zero waste" cycle.
Thirdly, it has low operating costs and convenient operation. The equipment has a compact structure, occupying only one-third of the area of a rotary kiln with the same production capacity, and reducing infrastructure investment by 40%; Adopting PLC intelligent control system, real-time monitoring of kiln pressure, temperature and other parameters can be achieved, with one click start stop adjustment. A single person can complete daily operations, reducing labor costs; And there are few vulnerable parts, with a maintenance cycle of up to 6-12 months, further reducing downtime losses.
Fourthly, the adaptability of raw materials is wide. The requirements for the particle size of limestone in vertical kilns are loose (20-80mm can be used), without the need for fine crushing, suitable for different quality raw materials, especially for small and medium-sized mining areas, reducing the cost of raw material pretreatment.
