摘要:
The invention relates to a safety system (1) for a nuclear plant comprising a plurality of catalytic recombiner elements (40, 44) that trigger a recombination reaction with oxygen when hydrogen is carried along in a feed gas flow, which system safeguards a reliable removal of the hydrogen from the gas mixture with an especially high degree of operational safety even under comparatively extreme conditions or scenarios of said type. According to the invention, the recombiner elements and/or the flow paths interconnecting two recombiner elements each on the gas side are designed in such a manner that a pressure pulse (40) produced in the gaseous medium by an ignition during the recombination reaction in a first recombiner element (40) triggers a gas displacement process in the feed section of a second, adjacent recombiner element (44), said process having a flow rate of at least 5 m/s.
摘要:
The invention relates to a device for recombining hydrogen, comprising at least one catalyst element (8), at least one heating pipe (7) that carries an operating medium (11) and is connected to the catalyst element (8) in a thermally conductive manner and a refrigerating device (14), connected to the heating pipe (7), for refrigerating the coolant (11). The invention aims to solve the technical problem of reacting both small and large quantities of hydrogen with the atmospheric oxygen present in the containments, in a controlled manner, within a wide range of concentrations and to dissipate the heat produced by said reaction to such an extent that the ignition temperature of each mixture is not reached. To achieve this, a first section (7a) of the heating pipe (7) is filled with liquid coolant (11), said first section (7a) is connected to the catalyst element (8), a second section (7b) of the heating pipe (7) is filled with a vapour cushion (12) containing an operating medium in vapour form (11) and the refrigerating device (14) is located in the second section (7b).
摘要:
The invention relates to an ignition system (1) with a number of spark igniters (4) for recombining hydrogen in a gas mixture. The aim of the invention is to provide an ignition system of this type which guarantees reliable, early ignition of an ignitable gas mixture by means of preionisation of the mixture, even with comparatively rapid gas displacement processes. To this end, each spark igniter (4) is configured as a rapid-pulse igniter with an operating frequency of approximately more than 10 Hz. The spark igniters (4) are interconnected in groups for supplying energy in order to ensure reliable ignition of an ignitable gas mixture in the event of a momentary breakdown of external devices as well as in the event that the ignition system is required to run for a particularly long time. Each group of spark igniters (4) is connected to a joint intermediate energy store (8), said intermediate energy stores being connected to a central energy supply unit (7).
摘要:
A hydrogen removing apparatus removes without fail the hydrogen gas generated within a nuclear reactor-housing vessel by a metal-water reaction so as to suppress the pressure elevation within the nuclear reactor-housing vessel. The hydrogen removing apparatus comprises a reactor (11) provided with at least two openings (12a and 12b) through which the outer atmosphere is introduced into the reactor (11) and a catalyst bed (13) arranged within the reactor (11) and loaded with a catalyst for promoting the ammonia synthesizing reaction between a nitrogen gas and a hydrogen gas.
摘要:
Die Erfindung betrifft eine Vorrichtung zum Beseitigen von Wasserstoff mit einer Vorrichtung (21) zum Umsetzen von Wasserstoff und Sauerstoff, mit einer Turbine (30,36), die mit einer Welle (26) drehfest verbunden ist, und mit einem ersten Verdichter (22), der mit der Welle (26) verbunden ist, wobei die Vorrichtung (21) zwei Einlaßleitungen (20,28) und eine Auslaßleitung (29) aufweist, wobei eine erste Einlaßleitung (20) zum Einlassen eines wasserstoffhaltigen Gasgemisches und eine zweite Einlaßleitung (28) zum Einlassen eines sauerstoffhaltigen Gasgemisches dienen, und wobei die Auslaßleitung (29) zum Auslassen des Gasgemisches nach einem zumindest teilweisen Umsetzen des Wasserstoffes und des Sauerstoffes dient, wobei die Welle (26) die von der Turbine (30,36) erzeugte Drehbewegung auf den ersten Verdichter (22) überträgt, und wobei der erste Verdichter (22) mit der zweiten Einlaßleitung (28) verbunden ist und das Sauerstoff enthaltende Gasgemisch der Vorrichtung (21) verdichtet zuführt. Mit dieser Vorrichtung wird das technische Problem gelöst, sowohl große als auch kleine Wasserstoffmengen bereits in der Nähe des Entstehungsortes kontrolliert umzusetzen, wobei insbesondere eine ausreichende Sauerstoffzufuhr für die Umsetzung auch großer Wasserstoffmengen gewährleistet ist.
摘要:
An apparatus for removing flammable gas is started only when a concentration change in the flammable gas in a primary containment vessel is detected, so that the decrease in activity of a catalyst due to a catalyst poison is prevented. In one embodiment this apparatus has a catalytic recombining apparatus equipped with a catalyst (1) for reacting the flammable gas, a case (2) that houses the catalyst, and lids (4a and 4b) installed at openings (3a and 3b) of the case (2). Adhesive parts (5a and 5b) which adhere the lids (4a and 4b) and the case (2) is melted at high temperatures, and heating elements (6a and 6b) composed of an oxidizing catalyst of hydrogen is installed in contact with the adhesive parts (5a and 5b). Thus, the lids are not only closed under normal conditions but opened when the adhesive parts (5a and 5b) being melted along with the temperature increase in the surrounding atmosphere. In another embodiment, the apparatus makes use of a porous columnar body.