Control method of denitration system automatic control program

Abstract

The present invention discloses a control method of a denitration system automatic control program. The method comprises the following steps: (1) following parameters are set in an automatic control program: starting and stopping temperature of an automatic program, denitration object parameters and deviation values, reducing agent injection mass shift control values, sampling time and ammonia escape control values, wherein when the ammonia escape is out of limits, the system is automatically switched to the lowest gear for operation, and when the ammonia escape is continuously out of limits in two sampling periods, the system is automatically stopped; (2) setting the system in an automatic operation state, and when the condition is satisfied, the system automatically starts, the initial work parameters are operated according to built-in gear parameters; and (3) when the sampling period is arrival, the system compares the collected NOx and the ammonia escape values with target parameters and control values, and the running parameters are operated and determined in the next sampling period. The control method of the denitration system automatic control program is simple in programming, few in control point bits, little in investment, low in operation and maintenance cost and the like, and has good development prospects and popularization values.

Description

technical field [0001] The invention relates to a method for controlling the automatic control program gear position of a denitrification system, in particular to a control method for an automatic control program of a waste incineration flue gas denitrification system, and is also applicable to flue gas desulfurization and denitrification systems in the fields of steel, chemical industry, and thermal power plants with similar conditions And the control method of the automatic control program of the dosing system in the pharmaceutical, petrochemical and other industries. Background technique [0002] As people's awareness of the harm caused by NOx to the atmosphere and human beings is getting deeper and deeper, many countries have successively issued relevant measures and standards. The control of NOx index in flue gas emission is the top priority, and many countries have implemented strict regulations. In the field of waste incineration, there are EU standards and national ...

AI Technical Summary

Problems solved by technology

In the actual application process, due to the complexity and variability of the parameters in the reaction zone, the control results are often unsatisfactory

It is not uncommon for the system to oscillate, jump, and change suddenly, and due to the delayed feedback of the monitoring system, the delay of the control results is even greater, and it is often difficult to achieve the ideal state of stable operation of the system

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