초록 ▼

Improved fluidized bed precipitators (20, 46, 62, 74, 108, 112, 134, 168) especially useful for the treatment of waste waters containing soluble phosphorus are provided, having upright, primary fluidized bed sections (22, 48, 64, 76, 110, 114, 136) and obliquely oriented solids settling sections (28

Improved fluidized bed precipitators (20, 46, 62, 74, 108, 112, 134, 168) especially useful for the treatment of waste waters containing soluble phosphorus are provided, having upright, primary fluidized bed sections (22, 48, 64, 76, 110, 114, 136) and obliquely oriented solids settling sections (28, 54, 68, 120, 144) which enhance the settling of small particles (166) and return thereof to the fluidized bed sections (22, 48, 64, 76, 110, 114, 136). The precipitators (20, 46, 62, 74, 108, 112, 134, 168) may also be equipped with a solids detection/withdrawal assembly (178) made up of one or more pressure transducers (180, 182) operable to determine the pressures within the fluidized bed sections 22, 48, 64, 76, 110, 114, 136) as a measure of bed densities, along with a selectively operable valve (172) which may be opened to periodically remove solids without clogging. The precipitators (20, 46, 62, 74, 108, 112, 134, 168) may be used to control soluble phosphorus levels in single- or multiple lagoon (184, 186) waste water systems.

대표청구항 ▼

We claim: 1. A method of treating a fluid including precipitatable materials therein, said method comprising the steps of:directing said fluid into the lower end of an elongated primary tubular section presenting a first upright longitudinal axis;creating fluidized bed conditions within said primary

We claim: 1. A method of treating a fluid including precipitatable materials therein, said method comprising the steps of:directing said fluid into the lower end of an elongated primary tubular section presenting a first upright longitudinal axis;creating fluidized bed conditions within said primary tubular section, and allowing precipitated particles to collect adjacent the lower end of the primary tubular section;directing portions of said fluid within said primary tubular section into a settling section operably coupled with and in communication with the interior of said primary tubular section above said inlet,said settling section presenting a plurality of oblique flow paths oriented in the direction of a second longitudinal axis through said settling section, said second longitudinal axis being oriented at an acute angle relative to said first upright axis of said primary tubular section to allow said precipitated particles to settle from said fluid, said fluid flowing through said plurality of flow paths to a settling section outlet; andallowing precipitated particles within the settling section to descend into the primary tubular section and collect adjacent the lower end of the primary tubular section.