Gas separation – With guide means effecting removal of constituent layer out... – At escape means for heavier constituent
Patent
1989-06-20
1990-10-02
Spitzer, Robert
Gas separation
With guide means effecting removal of constituent layer out...
At escape means for heavier constituent
55474, 55479, B01D 5308
Patent
active
049604473
DESCRIPTION:
BRIEF SUMMARY
CROSS REFERENCE TO RELATED APPLICATIONS
This application is a national phase of PCT/EP 87/00639 filed Oct. 28, 1987 and based upon a German national application P36 611.1 of Nov. 12, 1986 under the International Convention.
Our present invention relates to a reactor with a moving layer for the removal of undesirable gaseous components from gases wherein the gases are lead diagonally through a layer of granular adsorption agents traveling downwardly, whereby the moving layer is separated by shutters from the gas chambers and the reactor is narrower in the proximity of the inlet and the outlet for the adsorption agents, so that a distribution chamber and a discharge chamber are formed.
BACKGROUND OF THE INVENTION
It is known to purify gases with the aid of reactors having a moving layer and wherein the gas flows diagonally. In the German open application 29 11 721, for instance, a process for the removal of sulfur oxides and nitrogen oxides is disclosed, wherein the exhaust gases are passed diagonally through a reactor with a moving layer of granular, carbonaceous adsorption agents, traveling from the top to the bottom. The adsorption agent is supplied through a distribution chamber, which does not have shutters, located at the top of the reactor, to the moving layer traversed by gas, which is laterally limited by shutters through which the exhaust gas can enter, respectively exit. The adsorption agent travels slowly downwardly, into a discharge chamber, which again is not limited by shutters. The cone-shaped chamber which are filled with the adsorption agent, are not traversed by the exhaust gas. The more compact the build of the adsorber, i.e. the higher the ratio of the bed depth to the bed height, the higher becomes the ratio of the space which is not traversed by gas to the active adsorber volume.
OBJECTS OF THE INVENTION
It is the object of the present invention to avoid dead flow volumes particularly at the bottom and the top of a moving-layer reactor.
This object is attained according to the invention through the characteristics defined in claim 1. This object is attained according to the invention by additionally forming the distribution chamber and the discharge chamber with shutters so that the gas chambers extend over the entire area of the shutter.
According to the invention, on one side of the distribution chamber a gas- and adsorption-agent guide is provided. The shutters in the area of the distribution chamber can be arranged along an arc of a circle whose radius corresponds to the bed depth.
In the traveling-layer reactor of the invention, the distribution- and discharge chambers are integrated into the reactor volume. As a result, the volume of the reactor can be considerably reduced in comparison to the state of the art. Since the entire moving layer is uniformly traversed by the gas flow, in the case of exothermic reactions the heat can be extracted everywhere. In this way, no undesirable temperature increases occur at any point of the moving layer.
On one side of the distribution chamber, a gas- and adsorption agent guide is provided, which prevents turbulence and related marginal currents.
In a preferred embodiment, the shutters are arranged along an arc of circle with a radius corresponding to the bed depth. As a result, in the entire area of the distribution chamber, equal flow pathes for the gas are available.
BRIEF DESCRIPTION OF THE DRAWING
The above and other objects, features and advantages of the present invention will become more readily apparent from the following description, reference being made to the accompanying drawing, the sole FIGURE of which is a vertical section through an apparatus in accordance with the invention.
SPECIFIC DESCRIPTION
As can be seen from the drawing, in a moving-layer reactor 1, a traveling layer 2 of adsorptive agents is formed which is guided through shutters 3, 3a in respective jalousies. The adsorptive agent is fed to a distribution chamber 4 by an adsorptive-agent supply inlet 9. It travels through the reactor into a discharge cha
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Bruggendick Hermann
Knoppik Berthold
Richter Ekkehard
Weber Raimond
Bergwerksverband GmbH
Dubno Herbert
Spitzer Robert
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