And after study on large amount of detecting and testing data from indoor and outdoor the worksite, it put forward the methods suitable for the fly ash rolling and filling in the dry ash yard, and also made the suggestion about the matters which should be paid attention to during the design, construction and operation of the dry ash yard.

Many dry disposal sites have been constructed recent years.

On operation and management of dry-ash yard in valley

Through expounding the operation and management of dry-ash yard in valley,this paper introduces the ash unloading,leveling and rolling operation of dry-ash yard,and emphasizes the importance of the operation and management of dry-ash yard on environmental protection.

Taking a power plant in south China as an example, an environmental design of valley dry ash deposit design was introduced to deal with rainwater which can be easily polluted by ashes and slags.

Taking the dry ash yard of the newly built engineering of Hequ Power Plant (2 × 600MW)as the example, this paper introduces the design of the dam body and excessive water draining structures of valley dry ash yard.

The technology for forced draft and dense state ash handling with internal by pass differs from others because the dry ash doesn t need to be transported suspendedly.

Since the ash pond volume of Units 4 and 5 in Shajiao A Power Plant approaches designed period,it is necessary to convert the original wet ash exhausting mode to dry ash handling in view of economics and environmental protection.