ZX 200 advanced mud cleaning device with high technique performances is designed for dealing with artificial drilling fluid in constructing diaphragm wall or drilled piles The principles features of and layout it in the field are discussed in this pape

A mud purification and recovery device used for non-open-cut directional drilling;

It is pointed out that the column of whirlpool gaseity in the center has a marked effect on mud purification.

This article analyses the typical disposing method of waste drilling mud in foundationengineering,and narrates the tentative idea of GNJ-2A mud purifier,Shale shaker and cycloneare used to compose a three-step concentrative purification circulation system on GNJ-2Amud purifier,and direct circulalion and reverse circulation mud purification lechnological pro-cess are properly designed.

shale shaker and cyclone are used used to compose a three-step concentrative purification sys-tem on GNJ-2A mud purifier,direct circulation and reverse circulation mud purification technological process are properly designed.

Development of purification equipment with jet-bubbling for dust removal and desulphurization;

Study of the Purification equipmentof Low emission on Motorcycle;

Transform idea for 200×10~4m~3/d gas purification units in changqing gas-field;

The working principle of LPM movable high efficiency industrial lube oil purification unit is explained.