model of mass and energy transfer in a clinker rotary kiln

model predictive control of a rotary cement kiln - sciencedirect

model predictive control of a rotary cement kiln - sciencedirect

A first principles model of a cement kiln is used to control and optimize the burning of clinker in the cement production process. The model considers heat transfer between a gas and a feed state via convection and radiation. Furthermore, it contains effects such as chemical reactions, feed transport, energy losses and energy input. A model predictive controller is used to stabilize a temperature profile along the rotary kiln, guarantee good combustion conditions and maximize production. Moving horizon estimation was used for online estimation of selected model parameters and unmeasured states. Results from the pilot site are presented.

Application of model predictive control for the cement clinker production. First principle modeling approach of a rotary cement kiln for control purposes. State and parameter estimation by moving horizon estimation for the cement production. Performance comparison of manual and automatic control of a rotary cement kiln.

cfd modeling of combustion in cement kiln - cfd flow engineering

cfd modeling of combustion in cement kiln - cfd flow engineering

The cement kiln is one important part in cement production industries and it is used to heat the cement mixture. It rotates slowly at its axis. The cement kiln is exposed to carry high temperature cement mixture. The inner surface kiln has high temperature around 1200 C and outer surface is exposed to ambient temperature. To maintain structural strength, its our surface is continuously cooled with air or water jets.

In the enthalpy (energy) equation, there is the source term, Sh due to combustion That is heat source and heat transfer within the system that affect temperature of flue gases. In rotary kilns, heat transfer mode is dominated by thermal radiation.

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