Control system and control method for material bed of circulating fluidized bed boiler
A circulating fluidized bed and material layer control technology, which is applied in the boiler automatic control system and the control field of circulating fluidized bed boilers, to achieve the effect of solving the instability of the material layer, improving the efficiency of waste heat utilization, and improving the efficiency of waste heat recovery
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[0035] Design a factory circulating fluidized bed boiler 1x75t / h, adopt the automatic control method of the material layer of the present invention, its technological process is as follows figure 1 shown.
[0036] The specific design basis is as follows:
[0037] During normal production, the coal consumption of a single boiler is less than 14t / h;
[0038] Boiler slag discharge <8.5t / h;
[0039] The thickness of the material layer is 500mm, and the differential pressure of the material layer is 7-9KPa;
[0040] Cooling water volume of slag cooler 10—34t / h
[0041] Implement the method that the present invention applies PLC control system to implement the automatic control of material layer in circulating fluidized bed boiler:
[0042] When the boiler is in normal operation, after checking that the slag discharge system meets the opening conditions, open the water inlet and outlet valves of the slag cooler and pass water, then open the slag valve 8, start the PLC control syst...
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