Control system and method of failure endpoint of high-speed polishing mixed bed

Abstract

The invention discloses a control system and a method of a failure endpoint of a high-speed polishing mixed bed. The control system comprises a polishing high-speed mixed bed and an automatic mixed bed failure endpoint control system, wherein a mixed bed effluent quality monitoring instrument is arranged on a water outlet pipe of the polishing high-speed mixed bed; an output end of the mixed bed effluent quality monitoring instrument is connected with an input end of the automatic mixed bed failure endpoint control system; and an output end of the automatic mixed bed failure endpoint control system is connected with a control end of the polishing high-speed mixed bed. The system and the method can effectively ensure that effluent quality of the polishing high-speed mixed bed meets standardrequirements, and avoid blind control of the failure endpoint of the polishing mixed bed.

Description

technical field [0001] The invention belongs to the field of operation of a condensate polishing treatment system in a power plant, and relates to a finishing treatment high-speed mixed-bed failure terminal control system and method. Background technique [0002] With the continuous emergence of large-capacity and high-parameter units in power plants, higher requirements are placed on water vapor quality. GB / T12145-2016 "Water Vapor Quality of Thermal Power Generating Units and Steam Power Equipment" requires that the chlorine ion content of the effluent of the high-speed mixed bed after the finishing treatment of the DC furnace should not exceed 1 μg / L, and the chlorine ion content of the effluent of the high-speed mixed bed after the finishing treatment of the steam drum furnace should not exceed 2 μg / L. L. At present, the operation control level of the fine treatment high-speed mixed bed in various power plants varies, and the judgment of the failure end point of the mix...

AI Technical Summary

Problems solved by technology

Some power plants do not realize that the water quality of the mixed-bed effluent from fine treatment is deteriorating (for example, the content of chloride ions exceeds the standard), which leads to the corrosion and salt accumulation of steam turbines during maintenance.

However, some power plants control the operation cycle of the mixed bed to be very short in order to prevent the effluent chloride ion from the fine treatment mixed bed from exceeding the standard, and the resin in the mixed bed is frequently regenerated, which not only increases the discharge of waste acid, waste alkali and waste water, but also increases the workload of operating personnel. Labor intensity

Blind control of the failure endpoint of the fine treatment mixed bed can neither ensure that the water quality of the fine treatment effluent meets the standard requirements, but also increase the operating pressure of the power plant’s fine treatment system

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