Measures to prolong the operating period of cryogenic purification plant were discussed.

Aimed at these factors,the process was improved ard new assistants used so that the operation of the plant should be obviously improved and operating period be prolonged.

On the basis of the peculiarity of distribution networks,the numerical characteristics of power flow in an operating period are extracted.

Influence of height of fluidized catalyst bed on operation period of gas phase PE plant;

The 5TYD160 turbine air compressor set in KDON-6500/6500 air separation system in Jinchang Smelter has problems of short operation period,much operating and maintenance work because of its structure feature and operation environment.

The influence of surface-loading rate on the operation period and sludge distribution of the suspended media clarifier was studied in a pilot-scale test to investigate its operation principle and key parameters.

This study is to ascertain treating efficiency and stability of this system by TURT, SRT and cyclic operation control.

Difference between the results from cyclic operation and noncyclic operation is significant and the effectiveness is followed the sequence as(aeration filtration-pause-aeration tractive current)<(no aeration filtration-pause-aeration tractive current)<(continuous aeration tractive current).