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Abstract

In modern industrial production, some course¡¯s capacity often lags behind relatively largely, control also expect relatively much regarding temperature,etc, if adopt the control system of single circuit, its quality of control is unable to meet the production requirement. Because the bunches of control can improve the dynamic characteristic of the course effectively, improve operating frequency, reducing the time constant of the equivalent course and accelerating the response speed,etc., This text have proposed one bunch of solutions of control of boiler temperature.

This system leaves target of accusing of on boiler with electricity, export water temperature with boiler for accuse of parameter mainly, regard the burner hearth water temperature as one pair of parameters of accusing of, regard voltage of resistance wire of the heating furnace as the control parameter, regard PLC as the controller, form one bunch of control systems of boiler temperature; Finish the designing of systematic hardware and the program with PLC.

Through debugging, PLC procedure has realized the data gathering, A/D changing, PID operation and D/A changing, etc., has reached the designing requirement.

Key words

Boiler; Temperature; Bunches of control; PLC; PID.

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