Nuclear power EDI electrolytic desalting device

Abstract

The invention discloses a nuclear power EDI electrolytic desalting device. The device comprises a system water inlet valve (1), a prefilter (3) and a precision filter (6). The precision filter (6) is connected to a concentrated water manual regulation stop valve (10) and a fresh water side electric door (11), and both the concentrated water manual regulation stop valve (10) and the fresh water side electric door (11) are connected to an EDI electrolytic desalting module (15). The EDI electrolytic desalting module (15) is respectively connected to a water production side check valve (16) and a concentrated water side check valve (17). The nuclear power EDI electrolytic desalting device provided by the invention has the advantages of reasonable structure design, convenient operation, automatic operation, automatic switching, up-to-standard water quality, stable water production, high recovery rate and stable operation, and can ensure an effluent water conductivity of less than 0.1us/cm. The device has the characteristics of no leakage unless abnormal situation, small occupation area, system integration, easy installation and convenient maintenance.

Description

technical field [0001] The invention relates to a nuclear power unit matching device, in particular to a nuclear power EDI electrolytic desalination device for a steam generator blowdown system in a nuclear power unit. Background technique [0002] In nuclear power units, the leakage of the condenser or the leakage from the primary circuit to the secondary circuit will cause the pollution of the secondary circuit water. In order to keep the water quality of the secondary circuit system within the limit of normal operation of the power station, blowdown of the steam generator is necessary. The steam generator blowdown system plays the role of collecting and treating the blowdown water from the steam generator. [0003] For the purification and desalination of steam generator sewage, the commonly used treatment process is resin bed (cation bed + mixed bed). The resin bed uses anion resin and cation resin to directly contact with sewage water, thereby exchanging anions and cati...

AI Technical Summary

Problems solved by technology

[0003] For the purification and desalination of steam generator sewage, the commonly used treatment process is resin bed (cation bed + mixed bed). The resin bed uses anion resin and cation resin to directly contact with sewage water, thereby exchanging anions and cations in the water into the resin. However, the resin will fail after exchanged to a certain amount. At this time, acid washing and alkali washing regeneration are required to restore the function of the resin, and because some resins are inevitably in a state of failure for a long time, a large amount of waste resin will be generated, and regular maintenance and maintenance are required. replace

In addition, due to the large amount of resin used in the resin bed treatment process, it needs to be stored in a tank and occupies a large area

The processing accuracy is not high, about 0.2us / cm, and it is easy to float and has poor stability

And the current resin bed system is still unable to achieve the degree of automation of full automatic unattended

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