Screening methods and apparatus

摘要

An apparatus (25) for use in screening a liquid and solids mixture feed (2) comprises a conduit (18), including a screening portion (22) that is formed and arranged to divide a liquid and solids mixture feed flowing through the conduit. The feed (2) is divided into a first, cleaned stream (C1) comprising liquid and solid particles of below a selected size limit, and a second, concentrated, stream (24) comprising liquid, and particles above the selected size limit. The apparatus (25) may be a stand alone module, part of a system with other solids and liquids separating equipment or an integral part of a solids and liquid separator such as a shale shaker. Methods of using the apparatus (25) are also described.

主权项

1. A modular vibratory screening machine having a basket formed and arranged for mounting one or more processing modules, or a basket constructed from one or more processing modules, said modular vibratory screening machine comprising:
a) a processing module having an apparatus including a conduit, that includes a screening portion and formed and arranged to divide a liquid and solids mixture feed flowing through the conduit into a first, cleaned stream having liquid and solid particles of below a selected size limit, and a second, concentrated, stream having liquid, and solid particles above the selected size limit; wherein an outlet for the second concentrated stream from the screening portion is in the form of a weir assembly; the weir assembly comprising:
a trough in fluid communication with said screening portion and having a bottom wall disposed at a lower height than the bottom wall of the screening portion; andan outlet over which the second concentrated stream flows in use; said modular vibratory screening machine optionally having one or more the following modules: b) a top screen or scalping deck; c) a conventional single deck screening module; d) a dual deck screen module; e) a dual deck screen module with a flow distribution system allowing parallel or series processing on the two screens; f) a dual deck screen module with a flow distribution system switchable between allowing parallel or series processing on the two screens; g) a multiple deck screen module having three or more screens in a stack; h) a multiple deck screen module having three or more screens in a stack with flow distribution system; and i) a flow distribution module for fluid interconnection between screen decks and/or between modules.