US 10,770,190 B2Granted

Catalytic recombiner and filter apparatus

AssigneeFramatome

InventorsAxel Hill, Stefan Rosenberger

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Abstract

A catalytic recombiner and filter apparatus is especially suited for placement in a containment of a nuclear reactor. The apparatus has a natural convection flow duct with a number of catalytic elements for recombining hydrogen and oxygen contained in a gas flow through the flow duct. The catalytic recombiner and filter apparatus provides for reliable hydrogen reduction and iodine filtering for a gas flow even for a comparatively long period of operation. The catalytic recombiner and filter apparatus includes a number of adsorber elements with iodine adsorbing surfaces and with macroscopic flow channels in between. The iodine adsorbing surfaces are flown over by the gas flow, and the adsorber elements are arranged, when in use, downstream of the catalytic elements in a direction of the gas flow.

Claims13

Dependent claims

A catalytic recombiner and filter apparatus, comprising:

a duct;
a number of catalytic elements disposed in said duct for recombining hydrogen and oxygen, or carbon monoxide and oxygen, contained in a gas flow through said duct;
a number of adsorber elements arranged inside said duct, said adsorber elements having iodine adsorbing surfaces and macroscopic flow channels formed in between said iodine adsorbing surfaces, wherein said iodine adsorbing surfaces are flown over by the gas flow;
said adsorber elements being arranged downstream of the catalytic elements in a direction of the gas flow;
a housing enclosing said duct, said housing having a section between said adsorber elements and said catalytic elements with a number of ventilation slots for facilitating an influx of ambient air into said duct;
and
a movable cover element disposed for covering a respective said ventilation slot and coupled to a temperature-dependent passive actuator, configured for opening said ventilation slot above a pre-defined critical temperature prevailing in said duct.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 16/503,784Filed 5 Jul 2019 · continuation
Priority: 11 Jan 2017
Published: US 2019/0348185 A114 Nov 2019
Granted: 8 Sep 2020
Term ends: Not estimatedThe source records don’t support an estimate.

Classification16 codes

G21C 9/06
Means for suppressing fires ; Earthquake protection: means for preventing accumulation of explosives gases, e.g. recombiners
B01D 53/0407
With stationary adsorbents: constructional details of adsorbing systems
B01D 53/864
Catalytic processes: removing carbon monoxide or hydrocarbons
B01D 53/8671
Catalytic processes: removing components of defined structure not provided for in B01D53/8603 - B01D53/8668

Family

PCT/EP2017/050486Parent of this continuation · filed 11 Jan 2017
US 2019/0348185 A1Pre-grant publication · published 14 Nov 2019
US 10,770,190 B2This patent

From the US filing history. Foreign family members aren’t listed.

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