Drying and gas or vapor contact with solids – Apparatus – With means to treat gas or vapor
Patent
1990-03-14
1993-01-12
Bennet, Henry A.
Drying and gas or vapor contact with solids
Apparatus
With means to treat gas or vapor
34167, 34168, 34165, F26B 1712
Patent
active
051778769
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
Reactors of the type under consideration herein generally serve for bringing a gas into intimate contact with a solid available as a bulk material in order to bring about a reaction and/or adsorption between gas and solid. Such reactors are utilized in the catalytic conversion of gases, in the adsorption of gases, or in fine dust filtering. In general, the bulk material is conducted through the reactor from the top toward the bottom while the gas is passed over the solid in a crosscurrent or countercurrent fashion. The countercurrent operation generally affords better contact and better distribution between the two phases and therefore is more effective, i.e., has a higher degree of efficiency. However, the practical realization of reactor installations of the type discussed above has met with considerable problems and thus far has not as yet been accomplished, at least not on an industrial scale.
A moving bed reactor of the aforementioned type has been known from German Laid-Open Patent Application No. 3,313,943, wherein the bulk material is introduced centrally into the reaction chamber by way of the first inclined sliding surface. After passing through the reaction chamber, the bulk material enters a regenerating device located therebeneath. The material is discharged from the regenerating device via a second sloping sliding surface and passes to the base of a vertical conveying shaft; in the latter, the material travels upwardly to the first inclined sliding surface. In many usages of such reactors, thus, for example, in removing pollutants from flue gases, the gas must be treated in multistage fashion in various reactors. First of all, the flue gas passes through at least one reactor wherein an SO.sub.2 cleaning step is performed. Only thereafter will NO.sub.x reduction take place in a further reactor stage. In industrial plants, such as power plants, for example, the volume stream of flue gas produced is so considerable that it can be treated in accordance with regulations only in parallel reactor stages. In these large-scale industrial uses, reactor systems must thus be provided which consist of several reactor modules serving for identical types of treatment as well as different-type treatments. A module-type combination of several moving bed reactors of the conventional type of structure is impossible, above all, for the reason that the devices for feeding, discharging, and conveying the bulk material cannot be connected in parallel and/or in series. Furthermore, the known reactors occupy a relatively large construction volume.
SUMMARY OF THE INVENTION
It is, therefore, an object of the invention to design a reactor installation of the type discussed hereinabove in a module form in such a way that each reactor module occupies a small amount of space and the feeding and discharging of bulk material can be effected along particularly short routes and with simple means.
In order to attain this object, the reactor installation of this invention is characterized in that the first sliding surface and the second sliding surface are inclined in the same direction. The bulk material is thus fed to the reactor on one side and withdrawn on the other side. Consequently, parallel and/or series connections can be realized. Also, feeding and discharging of the bulk material take place in the simplest way imaginable, namely only and solely under the action of gravity. The reactor installation according to this invention requires a minimum of space.
Preferably, the first sliding surface is provided in the form of a bulk distributing plate. Thus, it combines the functions of transverse conveyance of the bulk material and its distribution over the entire cross section of the reaction chamber. The corresponding proportions of material are introduced, starting with the sliding surface, into the inlets of the reaction chamber by conventional means, such as flaps, slide gates, or the like. Such sliding surfaces acting as delivery and distributing plates work without moving parts and are i
REFERENCES:
patent: 2671057 (1954-03-01), McClure
patent: 2684930 (1954-07-01), Berg
patent: 2766534 (1956-10-01), Schaub et al.
patent: 3305939 (1967-02-01), Sonneschein et al.
patent: 3327611 (1967-06-01), Pedersen
Bruggendick Hermann
Klinger Karl
Bennet Henry A.
Gromada Denise L. F.
LandOfFree
Reactor installation for countercurrent treatment of gases and b does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Reactor installation for countercurrent treatment of gases and b, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Reactor installation for countercurrent treatment of gases and b will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1211642