DE4014517C2 - Method and device for the safe removal of gaseous and / or liquefied dangerous gases in containers - Google Patents

Description

It is known to harm gases by combustion do. The Beseiti poses a particular problem of combat gases.

So is the safe emptying and but also the tightness of the combustion apparatus only to master imperfectly.

The necessary even dwell times are also necessary not precisely adhered to without backmixing. So can if the combustion process is uneven, for example in the event of deflagrations, uncontrollable gas breakthroughs consequences.

The method according to the invention and its installation set themselves the task of safely closing these containers empty, the amount of gas released thermally / che to render the mixture harmless and the emptied containers dispose.  

It is assumed that the material to be disposed of at for example warfare agent essentially in liquefied Form in solid containers (e.g. bombs or grenades) partially under pressure in metallic bodies is closed.

Furthermore, it is assumed that the respective Gas quantities are in different containers, each but not in a larger amount than max. 100 l per loading ratio.

In the first process step, the container ( 1 ) to be disposed of is introduced into a chamber ( 2 ) under vacuum via a lock ( 3 ). In the chamber, the container can be received, for example, by a remotely controlled manipulator ( 4 ) and fed to a device ( 5 ) for opening the container.

The chamber ( 2 ) is dimensioned so that the escaping gas only produces a pressure equal to / less than 1 bar after its full constant expansion.

For example, only a volume of approx. 100 m ^{3 is} required for the expansion of 100 l liquid.

So that the container ( 2 ) in any phase of the emptying process, even if it should take place explosively, take any internal overpressure.

It can neither leak gas in this phase, nor the container due to an overpressure load stressed or damaged and on any Faucets and locks, for example, due to defective you gas leakage.

The gas now in the container ( 2 ) should not, as usual, be a combustion chamber, which in general can only be carried out with great difficulty with a high seal and with controlled gas movement and a uniform dwell time, and also increases the amount of gas due to its combustion gases. In contrast, the procedure according to the invention is to suck off the gas to be treated via a pipe coil ( 6 ), which can be carried out in a very controlled manner and, if necessary, step by step, preferably electrically induction- or resistance-heated ( 7 ). The pipe cross-section can be made as small as desired and the pipe length as large as desired, so that the necessary dwell times in the required treatment zones can be maintained without undesirable back-mixing.

In this forced flow of material in the pipe section ( 6 ), as required for the conversion process, reaction substances can be added exactly in the required amount, for example via a metering device ( 8 ).

At the end of this thermal reactor, the escaping gas mixture is passed through a cooler ( 9 ) in order to achieve the necessary permissible temperature for the subsequent vacuum pump ( 10 ) which supplies the gas to a chimney ( 11 ).

At the end of this suction process, the chamber ( 2 ) is again under vacuum and can be closed via the valve ( 19 ) for unloading and subsequent reloading.

This means both unloading and reloading always under vacuum, d. H. gas leakage-free leads.

Both the discharge chamber ( 2 ) and the lock ( 3 ) and the thermal treatment section ( 6 ) can be additionally protected by a safety container ( 12 ) and also monitored for possible emissions.

The empty gas container ( 1 ) is removed by means of the manipulator ( 4 ) via the lock ( 13 ) into the disposal chamber ( 14 ).

The container is transferred under vacuum, ie with an extremely small amount of residual gas. In the chamber ( 14 ), the necessary thermal decomposition of this small amount of residual gas can be carried out, for example, by inductive heating. The required reaction gases or purge air quantities can be supplied via a metering pump ( 18 ).

If necessary, the thermal process can be carried out up to Melt the vessel.

The disposal of the small amount of residual gas to be removed can, as described for the main gas amount, take place via the closed section ( 15 ), ( 16 ) and ( 17 ).

Claims (10)

1. A process for the safe removal of gaseous and / or liquefied dangerous gases in containers, characterized in that the emptying of the gas container is carried out in a chamber under vacuum, the volume of which is so large that after relaxation of the internal chamber pressure does not exceed external pressure rises, and the gas in the chamber is guided for thermal and / or chemical conversion. 2. The method according to claim 1, characterized in that the gas in the chamber ( 2 ) is guided via an indirect, preferably zone-heated coil for thermal and / or chemical conversion. 3. The method according to claim 2, characterized, that a gas stream downstream through one of the coil Vacuum pump is generated. 4. The method according to at least one of the preceding claims, characterized in that the container is transported within the chamber for the purpose of inward and outward discharge via a remote-controlled manipulator ( 4 ) located in the chamber. 5. The method according to claim 1, characterized in that the emptied gas container ( 1 ) after removal of the gas mixture under vacuum from the vacuum chamber ( 2 ) is transferred to a disposal container ( 14 ). 6. The method according to at least one of the preceding claims, characterized in that a thermal decomposition of the remaining amounts of residual gas is carried out in the disposal container ( 14 ). 7. Device for performing the method according to one of the preceding claims, consisting of a with a lock ( 3 ) provided vacuum chamber ( 2 ), a downstream thermal treatment section ( 6 ) and a vacuum pump ( 10 ). 8. The device according to claim 7, characterized, that the thermal treatment line as preferred catchy coil is formed.   9. Device according to claim 7, characterized, that the pipe coil in zones, preferably electrically, is heated. 10. The device according to claim 8, characterized, that the pipe coil in one or more places their course with dosing connections for the introduction of required reactants to the required Places is provided.