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Method for optimizing and controlling rotary kiln air volume

A technology of air volume and controller, applied in the field of optimal control of air volume of rotary kiln, can solve the problems of unreasonable temperature field distribution of rotary kiln, insufficient fuel combustion of preheater, low thermal efficiency of preheater, etc. Controlled, less demanding effects

Active Publication Date: 2013-08-07
北京和隆优化科技股份有限公司
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Problems solved by technology

[0007] The problem to be solved by the present invention is: to invent an optimal control method for the air volume of a rotary kiln, to solve the product quality problems caused by the unreasonable distribution of the temperature field of the rotary kiln, to solve the problem of insufficient fuel combustion and raw meal in the preheater caused by unreasonable air volume. The problem of abnormal flow and low thermal efficiency of the preheater is generally achieved to reduce fuel consumption and stabilize product quality

Method used

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  • Method for optimizing and controlling rotary kiln air volume

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Embodiment Construction

[0015] The raw material flow rate F1 is used as the input of the fuel flow setter, and the output of the setter is a function of the input variable F1, which is set according to the design data or operating experience; T2SP and T2 are the set value and The measured value, △T12 is the temperature difference between the kiln head temperature and the kiln tail temperature, △T12SP, △T12 are the setting value and measurement value of the temperature difference controller between the kiln head and the kiln tail respectively, the output of the fuel flow setter and the kiln tail temperature The sum of the output of the controller and the output of the temperature difference controller at the kiln head and kiln tail is used as the set value of the fuel flow controller, and the fuel flow F2 is used as the measured value of the fuel flow controller. Each controller adopts the PID control algorithm to realize the fuel flow control. Closed-loop control; the value range of kiln tail temperat...

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Abstract

A method for optimizing and controlling rotary kiln air volume includes that closed-loop control is conducted on fuel flow according to load raw material flow, the kiln tail temperature and temperature difference between the kiln head and the kiln tail, optimal air volume is found according to the fuel flow, a back-to-back method and a self-optimization algorithm, and closed-loop control on the air volume is achieved. By means of the method, product quality problems caused by unreasonable temperature field distribution of the rotary kiln can be effectively solved, problems of insufficient burning of fuel, raw material flow abnormality in a preheater and low heat efficiency of the preheater due to unreasonable air volume can be solved effectively, and the purposes of reducing fuel consumption and stabilizing product quality are achieved.

Description

technical field [0001] The invention relates to the technical field of rotary kiln control, in particular to a method for optimal control of air volume of a rotary kiln. Background technique [0002] Rotary kiln is an important production device in metallurgy, cement and other industries. The rotary kiln process device usually includes multi-stage cyclone preheater, rotary kiln and cooling machine and other equipment. The productivity indicators of the rotary kiln production device include product quality and device capacity. , product energy consumption, safety and stability, etc., because the process involves gas-solid two-phase flow and complex reactions, the process lag is large, the correlation and coupling between parameters are serious, and there are high requirements for operation adjustment. It has always been the application research of industrial process control. problem. [0003] For the operation of the rotary kiln production device, it is generally based on th...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F27B7/42F23N1/02
Inventor 于现军董旭辉
Owner 北京和隆优化科技股份有限公司
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