The article introduces the parts and working principles of circulating close-open automatic sprinkler system and discusses the practicability of the system replacing Halon system.

The sliming water closed circuit practice of Chensilou coal process plant;

In order to save water and reduce polluted water discharge,we use elliptical tube in rectangular steel fin tube which is treated in hot dipping zinc and use force cooling by blast axial flow fan to condensate the air in tube then return the condensate to boiler to form a closed circuit,thus replace conventional water cooling tower.

Simplified process of slime water treatment employed at Chengzhuang Coal Preparation Plant in that all slime water was collectively treated;the particulate content in washwater was then reduce down to 10g/L by reasonable flocculent addition;realized were the automatic balance and closed circuitry of wash water.

Scaling mechanism of closed circulation of ash sluicing water in ash sluicing;

Internally it achieves the closed circulation of the gas, water and waste heat and comprehensive reutilization of the solid waste and externally, Qinggang successfully disposed the hazardous waste of chrome slag from the chemical industry.

The adoption reduces slime water concentration, enables the closed circulation and increases product quality.

Application of closed cycle of synthetically treated cyanide-bearing waste water;

The successful experience of slime water closed cycle is introduced from technical process and management.

Taking Zhujiadian Washery of Shanxi Liliu Coking Coal Group Company as the example, this paper introduces the formation mechanism of the slurry, probes into the measures for the treatment of the slurry, expounds the closed cycle mechanism of the slurry, and emphasizes the important functions of the water conservation.

The technology of the closed circulation and zero discharge in paper mills with waste paper as raw material is a mature one.