Cement kiln temperature control system

Abstract

The invention discloses a cement kiln temperature control system which comprises a raw material feeding machine, a kiln system and a kiln temperature controller. The kiln temperature controller acquires a preset temperature signal of the kiln system and outputs a temperature control signal a, a temperature monitoring module and an oxygen content analyzer are arranged in the kiln system, the oxygen content analyzer sends an oxygen content value to an oxygen content controller, the oxygen content controller outputs an oxygen content signal b, a first difference value signal obtained after subtracting is conducted on the temperature control signal a and the oxygen content signal b controls the raw material feeding machine to feed raw materials, the feeding amount of the raw material feeding machine influences the temperature of the kiln system, and the temperature monitoring module also outputs a kiln system temperature output signal which influences a driving input signal of the kiln temperature controller. The cement kiln temperature control system has the advantages of being simple in structure, low in equipment cost, high in production efficiency, capable of saving energy sources and achieving the good timeliness, high in response speed, stable, reliable, good in dynamic property and high in precision.

Description

technical field [0001] The invention relates to the technical field of temperature control in cement production control, in particular to a cement kiln temperature control system. Background technique [0002] The cement production process is a complex physical and chemical reaction process, especially the calcination process of cement clinker has the characteristics of obvious time delay, large inertia, nonlinearity and interference uncertainty. In order to obtain qualified clinker, the reaction temperature of the cement clinker kiln system must be guaranteed. However, there are many factors that affect the temperature of the kiln system during calcination. A slight deviation in control will cause wind pressure or thermal fluctuations, which will seriously affect clinker quality. [0003] At present, the main solution to the temperature control problem of the kiln system is to control the amount of fuel input, such as using a fixed amount of fuel input to maintain the temp...

AI Technical Summary

Problems solved by technology

In order to ensure qualified clinker, the reaction temperature of the cement clinker kiln system must be guaranteed. However, there are many factors that affect the temperature of the kiln system during calcination. A slight deviation in control will cause wind pressure or thermal fluctuations, which will seriously affect clinker quality

[0003] At present, the main solution to the temperature control problem of the kiln system is to control the amount of fuel input, such as using a fixed amount of fuel input to maintain the temperature in the kiln. However, the amount of raw material input has an impact on the temperature of the kiln system. It has a great impact. When the input of raw material is too much, the kiln material will increase, which will cause the temperature of the kiln system to drop, and it will easily cause material blockage and the phenomenon of raw materials, which will reduce the quality of cement production; when the input of raw material is small, the kiln will The temperature of the system will rise too fast, and the material will be over-burned, which will waste energy and cause product quality to deteriorate; therefore, in the cement production process, the temperature control of the kiln system is a problem to be solved today

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