The programmable controller is designs the manufacture for the industrial control application the special purpose computer control device, to raised equipment's service factor to play the influential role. With the lapse of time, PLC already no longer limited to initial century logic and the sequential control domain, more and more PLC products turn toward satisfy the more complex control requests to make great strides forward. Appears along with the field bus and the industry ethernet technology and promotes, more powerful promotion PLC product in industrial field widespread use. PLC is also quite widespread in the power plant boiler control system's application, like PLC in boiler regular pollution discharge system's application; PLC in chemistry water disposal system's application; PLC in steam turbine water recovery condenser rubber ball clean system's application; PLC in the feed pump gets up, stops in the control the application; PLC in chamber safekeeping of security supervisory system's application. Along with the PLC production and the development and the obvious merit, the power plant chemistry water disposal system became in the power plant to carry on the programmed control using PLC most early, the most widespread servosystem. The power plant chemistry water treatment including the boiler supplies water treatment, the congealment water treatment and the wastewater disposal, its goal lies in the prevention thermal energy equipment scaling, the corrosion and ties the salt, guarantees the reliable production, and achieves saving water and the control environmental pollution as far as possible. Considered the boiler supplies water treatment and the congealment water treatment's technical process is approximately similar, this topic mainly aims at PLC in the boiler supplies aqueous system's application design. Realizes to chemistry water treatment automated control, cuts the production cost enhancement production efficiency.
Key words water treatment of electric power plant, boiler supply water and condensed water treatment , controllogixPLC