Building materials industry - cement rotary kiln tail high temperature fan

The high-temperature fan at the kiln tail is mainly used to maintain the air circulation at the kiln tail, control exhaust gas emissions, and recover heat energy. Its specific functions are as follows:
1. Maintain system negative pressure and airflow balance

By extracting the high-temperature exhaust gas (containing dust, SO₂, etc.) generated by the kiln tail preheater and decomposition furnace, the system's negative pressure is ensured to be stable (usually -200~-500Pa), preventing positive pressure from causing exhaust gas backflow or equipment blockage.

It works in conjunction with the kiln exhaust fan to form a stable air circulation, ensuring the continuity of raw material decomposition and clinker calcination.
2. Heat recovery and waste heat power generation

High-temperature exhaust gas (300-400°C) is introduced into the waste heat boiler (SP boiler), which generates steam through heat exchange to drive the generator set, thereby improving energy utilization.

Optimizing fan speed can increase exhaust gas temperature and thus increase waste heat power generation (for example, in one case, coal consumption was reduced by 14 kg/t).
3. Combustion support and combustion control

Provide secondary air (containing oxygen) to the decomposition furnace to promote the complete combustion of fuel (coal powder) and reduce chemical incomplete combustion losses.

The temperature at the kiln tail can be controlled by adjusting the air volume (e.g., the first stage tube outlet temperature is 280-400°C) to avoid excessive NOx generation.
4. Equipment protection and energy-saving optimization

Prevent crusting or material accumulation in the kiln tail smoke chamber and reduce the risk of blockage by stabilizing the airflow.

Adopt frequency conversion technology or model predictive control (MPC) to optimize operating parameters and reduce power consumption (for example, the overall power consumption of clinker is reduced by 4 kWh/t).

The high-temperature fan at the end of the kiln is generally installed between the preheater and the decomposition furnace. If the air volume of the high-temperature fan at the end of the kiln is insufficient, the CO content in the decomposition furnace will increase, the risk of material collapse will increase, and directly affect the clinker production and quality. In addition, air leakage problems will significantly increase power consumption (for example, an air leakage rate of 13.63% will result in an annual loss of 660,000 yuan).

This series of fans has the characteristics of smooth operation, high strength, and long service life. This series of products has a compact design, convenient installation and commissioning, easy disassembly and maintenance, reliable operation, wear resistance, high temperature resistance, high efficiency, low noise, flat performance curve, large flow adjustment range, and a wide effective area.

Product Structure

Actual picture

Q: What is the monthly supply capacity?

50-100 units

Q: Do you offer quality assurance?

During the warranty period, if there are any quality issues with the product, please contact us for replacement

Q: Can samples be ordered?

Yes

Q: How is your after-sales service?

Monday-Sunday，7:30-18:00，Long-time online after-sales service is worry-free

Q: How can I keep up with the product progress if I don't go to your company?

After placing an order, we will report the production progress regularly

Q: What information do I need to provide to get an accurate quotation?

The operating conditions for the gas to be delivered include flow rate (m3/h), total pressure (Pa), temperature (℃), gas density (kg/m3), and the altitude of the usage location (m); the material of the fan; the voltage, frequency, protection level, explosion-proof level, and whether the motor is variable frequency or not.

Q: Can your packaging ensure the safety of the product?

We wrap the inlet and outlet of the fan, as well as the motor, with stretch film and then secure the fan in a wooden box, which can fully protect the product during transportation and handling.

Q: How long is the warranty period for the product?

1 year