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Dynamic self-correction control method of reheating smoke temperature of waste heat boiler

A dynamic self-calibration and waste heat boiler technology, applied in the direction of adaptive control, general control system, control/regulation system, etc., can solve problems such as large amount of calculation and complex controller structure, so as to improve dynamic performance and solve large lag in regulation Sexuality, simplified structure and complex effects

Active Publication Date: 2013-05-01
南京博纳能源环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, under the increasingly high performance requirements and the high degree of uncertainty in the process and environment, there are still some problems when the system is used for real-time control, such as the controller structure is too complex, the amount of calculation is large, etc.

Method used

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  • Dynamic self-correction control method of reheating smoke temperature of waste heat boiler
  • Dynamic self-correction control method of reheating smoke temperature of waste heat boiler
  • Dynamic self-correction control method of reheating smoke temperature of waste heat boiler

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Embodiment Construction

[0040] The present invention will be further illustrated below in conjunction with the accompanying drawings and specific embodiments. This embodiment is implemented on the premise of the technical solution of the present invention. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention.

[0041] like figure 1 As shown, the present invention aims at the slow process of the traditional control method of the waste heat boiler reheat flue temperature control system, which is easy to cause overshoot and low degree of automation. Dynamic self-calibration control is adopted to make the waste heat boiler reheat flue temperature system respond quickly, Dynamic tracking performance is stable. The specific implementation method is as follows:

[0042] Step 1: The controlled object model of dynamic self-tuning control obtained through the step response test of the set value of rehe...

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Abstract

The invention discloses a dynamic self-correction control method of reheating smoke temperature of a waste heat boiler. The method comprises the following steps of according to a dynamic self-correction control model of a controlled object obtained by a step response test of reheating smoke temperature settings, enabling an automatic control system of the reheating smoke temperature of the waste heat boiler to record a gas valve opening instruction sequence and a reheating smoke temperature measuring value sequence in a real-time way; and dynamically setting each parameter by a controller, so as to obtain the current gas valve opening increment instruction. The method has the advantages that the dynamic performance of the reheating smoke temperature control system of the waste heat boiler is improved, and the problems of large hysteresis and slow response speed of the reheating smoke temperature control system are effectively solved; the offset range between the reheating smoke temperature and the specified value is ensured, and the stability of the reheating smoke temperature control system is improved; and meanwhile, the stop of the waste heat boiler is avoided under the accident working conditions of great change of a waste heat source, no waste heat source, and the like.

Description

technical field [0001] The invention relates to the field of thermal automatic control, in particular to a dynamic self-correcting control method for reheating smoke temperature of waste heat boilers. Background technique [0002] The waste heat boiler reheating flue temperature system refers to the control system of the waste heat supplementary combustion device. It is one of the most important control systems in cement plants and steel plants, and it is also one of the difficult points of control. The controlled quantity is the temperature of the reheated flue gas. Generally, the temperature of the reheated flue gas is low, but the temperature is too low to make the waste heat boiler operate normally under the designed rated load, especially when the waste heat is used to generate electricity, causing the generator set to It often fails to operate at full load, deviates from the best design conditions, and even is forced to shut down, which reduces the operating efficiency...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B13/04
Inventor 张晓东刘杰君
Owner 南京博纳能源环保科技有限公司
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