In this paper,we discussed in detail the working principle of return stroke type softener,and made the readers realize more profoundly the evident superiority of return stroke type softener in cutting down costs of boiler water treatment through contrasting the traditional softener.

This increase the waterside temperature and the wall temperature of the ion-exchangers up to dewing temperature of environment, thus prevent ion-exchangers from dewing and corrosion.

The research for resistance and influencing factors of ion exchanger using citric acid extraction;

This article presents the principle, configuration and characteristics of floating-bed ion exchanger with double chambers and double layers.

To solve such problems, simple technical improvement has been made: changing the resin in the hydrogen ion exchanger from 001 × 7 to D113.

The inlensity analysis of the intermediate drain installation and its reinforced with the yoke bus duct in cation ion exchange unit with Φ3 m, which was run and was broken for many time, has been carried out.