Apparatus for continuously introducing or removing gases into an

Details Apparatus for continuously introducing or removing gases into an Apparatus for continuously introducing or removing gases into an

1986-12-04

1988-12-06

Wyse, Tom

Liquid purification or separation

With gas-liquid surface contact means

210179, 210219, 261 92, C02F 318, B01F 304

Patent

active

047894695

DESCRIPTION:

BRIEF SUMMARY
BACKGROUND OF THE INVENTION

1. Field of the Invention
The invention refers to an apparatus for continuously introducing or removing or, respectively, for continuous adsorption and desorption of gases in liquids or from liquids, in particular of substrates being subject to a biological conversion, comprising a rotor being immersed into the liquid. The invention further refers to the use of such an apparatus for the aerobic and anaerobic conversion of substrates.
In the following, the term introducing or, respectively, removing gases into liquids or, respectively, from liquids is to comprise any type of continuous absorption or, respectively, desorption accompanied or not by a chemical conversion.
2. Description of the Prior Art
For the purpose of aerating or, respectively, gassing of liquids it is already known to immerse a number of nozzles below the liquid level. It is further known to provide rotating impellers for achieving a better mixing effect.
In connection with the biological conversion of substrates it has already become known to arrange the microorganisms on rotating discs which are cyclically immersed into the substrate to be converted and again are lifted out of the substrate. Such apparatuses already provide the advantage that the microorganisms could be allowed to regenerate themselves within a short time interval under conditions being different from that in the substrate. In this manner it was, for example, possible when using yeast in the fermentation process to regenerate the yeast in gases containing oxygen before the yeast was again introduced into the substrate to be subjected to a fermentation.


SUMMARY OF THE INVENTION

The invention now aims at providing an apparatus of the initially mentioned type which reliably allows to obtain an effective conversion of materials with the lowest possible energy expenditure and which furthermore reliably provides an agitation of the substrate allowing a connection between the existing biozenosis and the substrates and the nutrients without substantial diffusion pathes. For solving this task the invention essentially consists in that the rotor is rotatably supported within a tubular receptacle for rotation around an axis extending in essentially parallel relation to the surface of the liquid, that the rotor has plates non-rotatably connected with the rotor and arranged in transverse direction to said axis and at axially adjacent locations, the surface of said plates being of rough design, that axially adjacent plates include in at least one cross section comprising the axis alternately an angle of more and less than 90.degree., that the circumference of the plates is located at a distance from the inner surface of the tube and in that the tube has at least one liquid inlet, at least one liquid outlet as well as at least one gas inlet and gas outlet. On account of the rotor being rotatably supported within a tubular receptacle, a directional flow through the tube can be maintained and a continuous conversion reaction with fresh substrate or, respectively, fresh biomass can be obtained. On account of the rotor having non-rotatably connected thereto plates, which have a surface of rough design, in transverse direction relative to the axis and axially adjacent, a corresponding biomass can be adsorbed on the surface of these plates, and,above all, the fact that the plates arranged at axially adjacent locations include,in a section comprising the axis,an angle of alternately greater and smaller than 90.degree. is responsible for obtaining within the tube a pulsating movement by means of which the liquid level can be risen and lowered in adjacent sections or to maintain a directional flow in case of correspondingly arranged overflow passages provided in the plates. The feature to rotatably support the plates in transverse direction to the axis of rotation and under an angle thereto deviating from 90.degree. results in a particularly effective manner in a characteristic movement of the substrate being characterized by upwardly and downwardly directed str

REFERENCES:
patent: 147717 (1874-02-01), Warren
patent: 2740696 (1956-04-01), Longwell
patent: 3684458 (1972-08-01), McCammon et al.
patent: 3761059 (1973-09-01), Rothert et al.
patent: 4101384 (1978-07-01), Faust et al.
patent: 4211647 (1980-07-01), Fredman et al.
patent: 4539112 (1985-09-01), Durot et al.

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