Realization method for detection controller for valve position adjustment abnormity of industrial pulverized coal boiler

Abstract

The invention relates to a realization method for a detection controller for valve position adjustment abnormity of an industrial pulverized coal boiler. The detection controller comprises a multi-channel proportional controller, an electric adjustment valve, an upper threshold comparator, a lower threshold comparator, a delayer I, a delayer II, an or-logic gate, a PLC/DCS controller, a DO module, an AI input module and an AO output module. During the combustion process of pulverized coal, when error values between the control values and the feedback values of the adjustment valve exceed maximum allowance upper limit values and lower limit values, the feedback values pass through the threshold comparators; timing alarming control is started; and experienced time is error overrun time. If the error overrun time exceeds preset normal input response time, logic signals output by the delayers drive the intermediate relay of PLC or DCS, and a program alarming and combustion interrupting signal is output. Compared with a conventional special valve positioning controller which consists of PCB columnwise elements, the detection controller has the obvious characteristics of low cost, flexible configuration, wide technological applicability and high antijamming capability.

Description

technical field [0001] The invention relates to a method for realizing an abnormal detection controller of an industrial pulverized coal boiler valve position adjustment, which is used for detecting the burner valve position of a combustion management system (BMS) in an industrial pulverized coal boiler furnace safety detection system (FSSS). Background technique [0002] Pulverized coal industrial boilers have a large scale, complex process, and high equipment coordination control requirements. In order to ensure the safety, reliability and economy of high-efficiency pulverized coal boilers and heating systems, improve the automation level of pulverized coal boilers and their heating systems becomes very important. [0003] The pulverized coal industrial boiler control system has the characteristics of many types of control objects, large scale, complex process, high requirements for equipment coordination and control, and high requirements for safety performance. [0004]...

AI Technical Summary

Problems solved by technology

When the air-fuel ratio control system controls the relevant valves beyond the control expectations, it will have a negative impact on the adequacy of combustion and economy, and it will cause deflagration, explosion and other furnace safety accidents due to the failure of the air-fuel ratio control

[0005] At present, this problem has not been generally paid attention to in the Furnace Safety Monitoring System (FSSS) of the domestic industrial pulverized coal boiler measurement and control system.

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