B - Operations – Transporting – 01 – J
Patent
B - Operations, Transporting
01
J
23/361
B01J 19/00 (2006.01) B01J 3/04 (2006.01) B01J 19/24 (2006.01) C02F 11/08 (2006.01)
Patent
CA 1276776
METHOD AND APPARATUS FOR CONTROLLED CHEMICAL REACTIONS ABSTRACT OF THE DISCLOSURE A method and apparatus for effecting accelerated chemical reactions at elevated temperatures and pressures including wet oxidation of materials in waste streams. An influent waste stream or first reactant is directed through a long tubular coil within a containment vessel with a second reactant being added to the influent. The now rates for the gas and liquid components of the waste stream are set to cause plug or slug flow of the waste stream through the tubular coil. The curvature of the coil tends to induce a secondary flow in the liquid such that the liquid tends to travel in a spiral thereby providing more intimate mixing with the gaseous phase. The containment vessel may be partitioned to form a series of successive compartments to permit different temperature gradients to be applied to successive sections of the tubing coil across its length. Alternatively, a tube in tube construction for the tubular coil permits counter current heat exchange between the waste stream within the inner tube and the returning stream within the outer tube. Multiple injection and extraction points are provided along the path of the tubular coil to permit gas, liquid or solid reactants to be added or extracted as desired. The tubular coil provides an excellent environmental container for the reaction stream and is extremely suitable for temperature control to permit continuous heat input, autogenic operation and continuous heat extraction. A tubular reaction coil having a plurality of generally elliptical loops is also provided with each loop having a substantially vertical upcorner portion and a substantially vertical downcorner portion. In one embodiment, the elliptical tubular reaction coil is a concentric assembly having an inner passage and an outer annulus. The preferred method includes flowing a liquid reactant stream into the elliptical reaction coil along with a gas reactant at an elevated temperature and pressure. The flow pattern of the reactants is regulated to provide slug and plug flow in the substantially vertical portions of the elliptical reaction coil loops to produce excellent mixing and mass transfer characteristics. In a modification, the reaction coil is provided within a containment vessel having a heat exchange medium. Heat can be supplied to the reaction coil or extracted by the heat exchange medium to better control the reaction.
532868
Binning Jack Edward
Carlson Franklin Berger
Ferraro Francis Michael
Peterscheck Hermann Walter
Gowling Lafleur Henderson Llp
Waste Treatment Patents & Research N.v.
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