PFR kiln
The PFR kiln (Parallel Flow Regenerative Kiln) is also known as a Maerz type kiln or twin shaft lime kiln; it is the core equipment of the modern lime calcining industry. Choosing PFR kiln means choosing high efficiency, energy saving, high quality and environmental protection. Production Capacity: 50-1200 t/d.
PFR Kiln for Sale
- Production Capacity: 300-600 t/d
- Limestone Particle Size: 30~60/40~80(mm)
- Activity: >360ml
- Fuel: Coal, natural gas, mixed fuels, etc.
- Applications: Metallurgy, building materials, calcium carbide, etc.
Professional PFR Kiln Supplier——One-stop Solution
The PFR kiln (Parallel Flow Regenerative Kiln) is also known as a Maerz type kiln or twin shaft lime kiln; it is the core equipment of the modern lime calcining industry. PFR kiln has a unique double-chamber alternating operation and heat storage working principle. It enables high-efficiency production for the project while reducing energy consumption. Choosing a PFR kiln means selecting high efficiency, energy savings, high quality, and environmental protection.
A professional PFR kiln supplier can provide customers with a full range of services from project start-up to stable operation. From project design, accurate quotation, transportation, installation, and commissioning, operation training, and after-sales service, AGICO is your most trusted long-term partner. Help your lime production line achieve stable and efficient profits.
PFR Kiln VS Traditional Vertical Kiln
—— Comparing PFR kiln with traditional vertical kiln can help you better understand the advantages of PFR Kiln.
PFR Kiln
- The core technology of PFR kiln (Parallel Flow Regenerative Kiln) is the parallel flow heat storage principle. Two kilns are operated alternately, recover the high-temperature waste gas generated by calcination, and use it to preheat the raw materials. It achieves the ultimate heat recovery and extremely low energy consumption. The PFR kiln process can calcine high-quality lime with high activity, low impurities, and good environmental performance.
- High thermal efficiency
- Energy saving and environmental protection
- Good product quality
- High cost
- The traditional vertical kiln is usually a single shaft kiln. It has a low investment cost and a small footprint, but it has limitations. A single shaft kiln has only one kiln working, so it is inefficient. In addition, the temperature distribution in the kiln is uneven, resulting in unstable lime quality, which is prone to premature burning or overburning.
- Low cost
- Small footprint
- Low thermal efficiency
- Average product quality
PFR Kiln Structure
Feeding system:
- The feeding system includes a silo, vibrating feeder, belt conveyor, etc. It is responsible for lifting the pre-treated limestone from the ground to the kiln top. The distributor then distributes the limestone evenly and flatly across the cross-section of the two kiln chambers. Even laying of materials ensures uniform airflow and efficient heat exchange.
Calcination system:
- The calcination system is located in the middle of the kiln and equipped with a combustion spray gun. The fuels are natural gas, coal gas, fuel oil, etc. The hot air flow from the combustion is in the same direction as the downward-moving limestone particles. The limestone has more uniform heating and less thermal shock. Effectively avoid local overburning. The burning zone has a multi-stage spray gun, which can achieve staged combustion.
Cooling system:
- The cooling system is located at the bottom of the kiln. The fresh air at the bottom absorbs the heat emitted by the hot lime and quickly heats up, becoming combustion air to preheat the materials.
Unloading system:
- The unloading system is located at the bottom of each kiln chamber and is usually used in conjunction with a vibrating feeder. Responsible for continuously unloading the calcined lime. The unloading amount and speed can be precisely controlled to ensure the continuity and stability of production.
Outstanding Advantages of PFR Kiln
High efficiency and energy saving: The biggest advantage of the PFR lime kiln is its extremely high thermal efficiency. Through the unique heat regeneration cycle design, it can maximize the recovery and utilization of waste heat generated during the calcination process. Significantly reduced fuel costs.
Stable product quality: PFR lime kiln uses staged combustion technology, ensuring uniform temperature distribution in the kiln. Avoids the local over-burning or under-burning phenomenon common in traditional kilns. The produced lime has high activity and stable quality.
Environmentally friendly: the biggest advantage of the PFR lime kiln is its extremely high thermal efficiency. Cycle design through heat regeneration can maximize the recovery and utilization of waste heat generated during the calcination process. Significantly reduced fuel costs.
High degree of automation: PFR lime kiln has an advanced automated control system, which can perform real-time monitoring of key parameters such as temperature, pressure, gas composition, etc. in the kiln. This not only reduces the difficulty of operation and labor intensity, but also improves production efficiency and safety.
FAQ
Is the investment cost of the PFR lime kiln high?
The initial investment cost of a PFR lime kiln is indeed higher than that of a traditional single shaft kiln. Similar to or slightly higher than a limestone rotary kiln. But the energy consumption is 20-30% lower than that of a rotary kiln. Considering the additional benefits brought by high-quality products. The overall project investment payback period is usually shorter.
The composition and particle size of the limestone raw materials fluctuate greatly. Can the PFR lime kiln adapt?
The ideal particle size of limestone for the PFR lime kiln is 30~60/40~80 (mm). We will conduct detailed raw material experiments and analysis for you in the early stages of the project. We can customize the distribution system, calcination curve, and operating parameters according to your specific raw material characteristics.
How are after-sales service and technical support guaranteed? Are spare parts supplied promptly?
We have established a complete global after-sales service system. Provide 7×24 hours of remote support, respond to urgent issues within 2 hours. When necessary, engineers will arrive at the site in the shortest possible time. We have sufficient original spare parts for our customers.