Power station boiler make-up water system mixed bed regeneration method

Abstract

The invention relates to the technical field of power station water supply, and concretely relates to a power station boiler make-up water system mixed bed regeneration method. The mixed bed regeneration method comprises the following steps: 1)backwashing and layering; 2)standing; 3)pre-injecting soda acid; 4) feeding acid or alkali; 5) replacing cathode and anode; 6)performing front washing on anion resin, 7)washing in series; 8) discharging water; 9)mixing resins; 10)rapidly settling; 11)filling with water; and 12)performing front washing, opening a front washing intake gate, a front exhaust gate and a self-use salt removal pump. The mixed bed regenerating method has the beneficial effects that the step of water discharging is cancelled; the step of water discharging is changed to regeneration with a full filling method, after steps of feeding acid or alkali and replacing cathode and anode, the step of performing front washing on anion resin is added for ensuring the regeneration effect; the step of rapidly settling is added after the step of mixing resins, so that re-separation of the mixing resins can be avoided. The method employs new regeneration process, once mixing bed enables successful regeneration, and automatic regeneration can be realized.

Description

technical field [0001] The invention relates to the technical field of power station water supply, in particular to a mixed-bed regeneration method for a power station boiler feed water system. Background technique [0002] Power plant boiler feed water treatment systems generally adopt the treatment process of fixed bed + mixed bed. The mixed bed can ensure that the conductivity value of the effluent water is less than 0.2 μs / cm, and the silica is less than 20 μg / L. After a period of operation with the feed water treatment system , the conductivity value of the mixed bed will gradually increase, exceeding the desalted water effluent standard, and the mixed bed needs to be regenerated. The regeneration steps are shown in Table 1: [0003] Table 1 Mixed bed regeneration step list [0004] [0005] Due to the very low conductivity of the mixed bed effluent, the regeneration process of the mixed bed is very strict. After the automatic regeneration process is adopted, the a...

AI Technical Summary

Problems solved by technology

After adopting the automatic regeneration process, the anion resin dry fat phenomenon often occurs, resulting in incomplete regeneration of the anion resin, and the electrical conductivity after the fat mixing is unqualified, and it needs to be regenerated, which increases the acid and alkali consumption.

The root cause of the dry grease phenomenon of the anion resin is that the middle row door is a pneumatic diaphragm valve, which can only be fully opened or fully closed, and cannot control the water cushion on the upper part of the anion resin

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