Lime rotary kiln and lime vertical kiln are common lime production equipment, used in the production and calcination process of lime. They differ in structure and working principle, and each has its own advantages and scope of application.
1. Lime rotary kiln is a long cylindrical rotating equipment with the following characteristics and advantages:
1. Wide scope of application: Lime rotary kiln is suitable for producing a variety of lime products such as highly active lime, white ash and clinker. It is capable of handling a variety of limestones and limestone mixtures, with high adaptability and flexibility.
2. High production capacity and short cycle time: Lime rotary kilns usually have large processing capacity and high production capacity, and can meet the needs of large-scale lime production. Its production cycle is relatively short, enabling continuous production and improving production efficiency.
3. High thermal efficiency: The lime rotary kiln uses indirect heating, and heat exchange occurs between limestone and fuel through the combustion chamber, reducing energy loss. It has high thermal efficiency and combustion utilization, can save energy and reduce production costs.
4. Strong controllability: The parameters such as rotation speed, tilt angle and feed volume of the lime rotary kiln can be accurately controlled and adjusted to meet the production requirements of different lime products. It has better process controllability and can achieve stable production operations.
5. Convenient flue gas treatment: The flue gas emissions of the lime rotary kiln are relatively low, and the flue gas treatment is relatively simple. Lime rotary kiln can be used in conjunction with dust removal equipment to reduce environmental pollution.
However, lime rotary kilns also have some limitations and shortcomings, including large equipment footprints, complex equipment structures, and difficult maintenance.
2. Lime shaft kiln is a vertically placed fixed equipment with the following features and advantages:
1. Suitable for specific limestone: The lime shaft kiln is suitable for limestone with better quality and has higher requirements for raw materials. It is often used to produce high-purity quicklime or special-purpose lime products, such as activated lime or industrial lime.
2. Simple structure and operation: The structure of the lime vertical kiln is relatively simple, and the operation and maintenance are relatively easy. It does not require rotating equipment, reducing equipment operation and maintenance costs.
3. High fuel utilization rate: The lime shaft kiln adopts direct heating method. The limestone is in direct contact with the burning fuel, so the heating effect is better. Its fuel utilization rate is relatively high, which can save energy and reduce production costs.
4. Smaller footprint: Compared with the rotary kiln, the vertical lime kiln has a smaller footprint and is suitable for lime production when the site is limited.
5. Less dust emissions: Lime shaft kilns have relatively low flue gas emissions and less dust emissions. It can be used in conjunction with dust removal equipment to further reduce environmental pollution.
However, lime shaft kilns also have some limitations and shortcomings, including low production capacity, long production cycle, and inability to produce continuously. Due to its upright structural characteristics, heating uniformity may be relatively poor, which may have a certain impact on product quality.
Generally speaking, the choice of lime rotary kiln or lime shaft kiln depends on the specific application needs and production requirements. If large-scale, continuous production and adaptability to a variety of lime products are required, a lime rotary kiln is a better choice. If you need to produce specific high-purity lime products, have high raw material quality requirements and limited space, a lime vertical kiln may be more suitable. It is important to comprehensively consider factors such as production scale, raw material characteristics, equipment investment and operating costs to select the lime production equipment that best suits your needs.
