Liquid purification or separation – With means to add treating material – With distinct reactor tank – trough or compartment
Patent
1974-03-18
1976-01-20
Hart, Charles N.
Liquid purification or separation
With means to add treating material
With distinct reactor tank, trough or compartment
210220, C02B 120
Patent
active
039336425
ABSTRACT:
Flocculation is carried out by mixing a coagulant, such as alum, with the fluid to be treated, such as water, and introducing the resultant mixture into the upstream end of a conductor. In a preferred form, the conductor comprises a series of discrete pipe sections, each downstream section having a progressively larger diameter and length with diverging transition members connecting adjacent sections. The sizes of the sections and the transition members are carefully predetermined, as is the radius of curvature of the coil, in the event the pipe is wound, so as to afford a velocity gradient and flow condition throughout the length of the pipe yielding optimum results.
Modified forms of continuous decayed velocity gradient systems are also disclosed. One form uses a coiled pipe wherein the pipe diameter is constant and the coil radius of curvature progressively increases. Another form utilizes staged compartments, each upstream compartment feeding each adjacent downstream compartment across progressively decreasing differential heads.
REFERENCES:
patent: 982704 (1911-01-01), Bull
patent: 1362611 (1920-12-01), Ellms
patent: 1605596 (1926-11-01), Langelier
patent: 2190596 (1940-02-01), Dorr
patent: 2413375 (1946-12-01), Pomeroy
patent: 3716485 (1973-02-01), Robertson
patent: 3740363 (1973-06-01), Fuller
patent: 3774768 (1973-11-01), Turner
patent: 3789989 (1974-02-01), Carson
Perry's Chemical Engineer's Handbook, 4th Edition, 1963, McGraw-Hill, pages 5-30 to 5-33.
Hart Charles N.
Spitzer Robert H.
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