How to Control the Temperature of Cement Rotary Kilns?
How to Control the Temperature of Cement Rotary Kiln?
The production of cement rotary kiln manufacturing equipment is very high, but how to control the temperature of the cement rotary kiln equipment is very important. Only by controlling the temperature of the equipment can the equipment calcine more effectively and improve the calcination efficiency. How to control it? This article will provide you with a solution. I believe that after reading this article, you will understand how to control the temperature of the rotary kiln.
Cement rotary kilns are mainly used to roast activated cement and light-burned dolomite used in iron and steel plants and ferroalloy plants. During the use of this equipment, the temperature is a very important factor that directly affects the quality, output, and energy consumption of the product. Therefore, in most cases, the temperature must be detected and controlled. This article mainly introduces three temperature control methods to facilitate users to adjust the temperature of the cement rotary kiln.
1. Manual control of temperature
Manual viewing of the fire is done using temperature control. The temperature of the active cement rotary kiln is mainly determined by experienced operators through various instrument readings of the kiln. The color and shape of the flame are observed through a fire mirror to estimate the temperature of the firing zone, or the temperature of the kiln tail gas is determined through instruments. So as to adjust and control the kiln temperature. Currently, this method is not very effective, and there may be human errors during operation, and it has high requirements for fire-watching workers.
2. Contact type automatic temperature measurement control
Contact automatic temperature measurement is a traditional method of directly measuring the temperature by inserting a temperature sensing element along the radial direction at the position to be measured on the axis of the active cement rotary kiln. The electrical signal is led out through a sliding ring fixed to the kiln body and an external brush system. The sliding ring and brush system are designed to adapt to the rotation of the kiln body. The advantage of this method is that the measurement signal can directly and truly reflect the temperature in the kiln, and the measurement method is simple, with Low investment. However, sometimes there may be poor outgoing signals, poor contact, and other situations.
3. Non-contact automatic temperature measurement control
Automatic temperature measurement technology can measure the surface temperature of the kiln body through non-contact thermometers, kiln body temperature scanning measurement systems, etc. The measurement signal is taken out by the measurement device and sent to the computer, and then the temperature situation in the kiln is analyzed through software. It is also possible to use a state recognition system based on combustion flame image features, that is, obtain flame images by a visual inspection system for preprocessing, segmentation, feature extraction, and recognition, and indirectly obtain the temperature of the rotary kiln. It is currently a relatively good fire-watching and temperature-measuring device, which replaces the traditional method of temperature adjustment by fire watchers based on experience. However, at present, this method of temperature control is still unable to control complex situations such as large flue gas dust and low visibility in the kiln.