- Product：Lime vertical steel skin kiln
- Alias：New type of vertical environmentally friendly lime kiln
- Calcination technology：countercurrent calcination
- Capacity scale：50-500T/P
- Control system：PLC Control System
- Unit energy consumption：120-130kg coal
- Usage：Metallurgy, construction lime calcination
- Price：Cost varies depending on production capacity scale
Lime vertical steel skin kiln
Lime vertical steel kiln, as an advanced mechanized and environmentally friendly lime production equipment, has been widely used in multiple fields such as metallurgy, chemical industry, and construction in recent years. Its unique steel kiln skin and vertical kiln body structure not only improve production efficiency, but also greatly enhance the durability and environmental performance of the equipment. This article will provide a detailed introduction to the working principle, technical characteristics, and advantages of lime vertical steel kilns in the industry.
Working principle of lime vertical steel kiln
The working principle of a lime vertical steel kiln is based on the decomposition reaction of limestone at high temperatures, where calcium carbonate (CaCO æ) is heated and decomposed into calcium oxide (CaO) and carbon dioxide (CO ₂). The entire calcination process is carried out inside a vertical kiln, achieving efficient, energy-saving, and environmentally friendly production goals through a precisely controlled combustion system and heat transfer mechanism.
Feed and preheating stage:
The raw materials limestone and fuel (such as wood, coke, natural gas, etc.) are accurately measured through an automatic weighing system, mixed evenly, and lifted to the top of the kiln by a material truck. At the top of the kiln, the raw materials are evenly distributed through a rotating feeder, forming a certain thickness of material layer. At this time, the high-temperature flue gas in the kiln is preheated by the preheating zone to increase the temperature of the raw materials and reduce energy consumption in the subsequent calcination process.
Calcination stage:
The preheated raw materials fall layer by layer under the action of gravity and enter the calcination zone. There is a combustion chamber inside the calcination zone, where the fuel is burned to produce high-temperature flue gas. High temperature flue gas comes into full contact with the raw materials through multi-layer grates for efficient heat and mass transfer, rapidly heating the raw materials to the calcination temperature (usually between 900 and 1100 ℃). During this process, limestone gradually decomposes to form calcium oxide (quicklime) and carbon dioxide gas.
Cooling and discharge stages:
The calcined lime enters the cooling zone and exchanges heat with the cold air entering the kiln, reducing the lime temperature to a suitable discharge level. The cooled lime is discharged from the bottom of the kiln through an ash unloading device with alternating sealing performance, completing the entire calcination process. Meanwhile, the hot air generated during the cooling process can be recycled to improve energy efficiency.
Technical characteristics of lime vertical steel kiln
Steel kiln skin:
The lime vertical steel kiln adopts steel kiln skin, which has higher strength and high-temperature resistance compared to traditional refractory material kiln skin. Steel kiln skin can effectively resist high temperature and chemical erosion, prolong the service life of equipment, and reduce maintenance costs. In addition, the steel kiln skin also has good sealing performance, reducing heat loss and dust pollution.
Vertical kiln body:
The vertical kiln structure allows the raw materials to fall naturally under the action of gravity, without the need for complex mechanical equipment assistance, reducing energy consumption and operating costs. Meanwhile, the vertical kiln body is conducive to the uniform distribution of high-temperature flue gas and effective heat transfer, improving the calcination efficiency.
Automation control system:
The lime vertical steel kiln is equipped with advanced automation control system to achieve precise control of various links such as feeding, combustion, and discharge. By using patented technologies such as computer simulation of wind caps, the uniform pressure and amount of air flow inside the furnace are achieved, ensuring sufficient and even combustion, effectively avoiding the phenomenon of "burning and over burning", and improving product quality.
Environmental protection equipment:
To meet the increasingly strict environmental requirements, the lime vertical steel kiln is also equipped with complete environmental protection equipment such as dust removal, desulfurization, and denitrification. Such as cyclone water film dust removal tower, turbulent ball desulfurization tower, etc., effectively reduce the concentration of discharged pollutants and achieve green production.
Efficient and energy-saving:
The lime vertical steel kiln adopts a fully sealed design to reduce heat loss; Simultaneously utilizing the hot air generated by the cooling belt for recycling and improving energy efficiency. In addition, by optimizing the combustion system and heat transfer mechanism, fuel consumption can be reduced, achieving high efficiency and energy conservation.
Advantages of Lime Vertical Steel Kiln
High production efficiency:
The lime vertical steel kiln adopts a continuous production mode, which has a large production capacity and can meet the needs of large-scale production. Meanwhile, its efficient heat and mass transfer mechanism makes the calcination process faster and more uniform, improving production efficiency.
Stable product quality:
Through precise automation control system and patented technology, the uniform pressure and quantity of air flow in the furnace are achieved, ensuring sufficient and even combustion, effectively avoiding the phenomenon of "burning and over burning", and improving the stability and consistency of product quality.
Good environmental performance:
The lime vertical steel kiln is equipped with comprehensive environmental protection equipment, effectively reducing the concentration of pollutants emitted and complying with national and local environmental standards. Meanwhile, its fully sealed design and heat recycling mechanism also reduce energy consumption and carbon emissions.
Low operating costs:
The steel kiln skin has high strength and high-temperature resistance, which extends the service life of the equipment; The vertical kiln structure and automation control system reduce energy consumption and labor costs; In addition, its efficient heat and mass transfer mechanism also reduces fuel consumption. Under the combined action of these factors, the operating cost of the lime vertical steel kiln is lower.
