Gas mixing device and synthesis gas producing device

Abstract

To provide a gas mixing device capable of safely mixing flammable gas containing, for example, methane or the like and combustion supporting gas such as oxygen-containing gas, and a synthesis gas producing device using this gas mixing device.Flammable gas containing methane or the like and combustion supporting gas such as oxygen-containing gas are supplied into a mixing vessel 20 via a first gas supplying section22a and a second gas supplying section 22b respectively, and these gases are mixed within a combustion range in the vessel 20 to be discharged via a discharge section 24. In the mixing vessel 20, packings 31 to 33 for forming a large number of narrow gas flow passages in the vessel 20 are packed so that velocity of the mixed gas flowing in the vessel 20 becomes higher than burning velocity of the flammable gas and the combustion supporting gas.

Description

TECHNICAL FIELD[0001]The present invention relates to a gas mixing device mixing flammable gas containing, for example, methane or the like and combustion supporting gas such as oxygen-containing gas, and a synthesis gas producing device using the gas mixing device.BACKGROUND ART[0002]In recent years, the global environmental problem and the problem of future depletion of petroleum resources ascribable to mass consumption of fossil fuel such as petroleum and coal have been controversial issues, and accordingly GTL (hydrocarbon liquid fuel) and DME (dimethyl, ether) which are clean fuels produced from natural gas and the like have been drawing attention. Source gas for producing GTL and DME is called synthesis gas and contains carbon monoxide and hydrogen.[0003]As a method of producing such synthesis gas, there have been conventionally known a steam reforming method (SMR) reforming natural gas or the like by steam, a partial oxidization method (POX) using oxygen in the absence of a c...

AI Technical Summary

Benefits of technology

[0010]The present invention was made under such circumstances, and its object is to provide a gas mixing device capable of safely mixing flammable gas containing, for example, methane or the like and combustion supporting gas such as oxygen-containing gas, and a synthesis gas producing device using the gas mixing device.

[0023]The gas mixing device according to the present invention includes the packings packed in the mixing vessel, and therefore, when the flammable gas containing, for example, methane or the like and the combustion supporting gas such as oxygen-containing gas are mixed in the mixing vessel, the velocity of the mixed gas flowing in the narrow gas flow passages formed in gaps between these packings becomes higher than the burning velocity of the mixed gas. As a result, even if a combustion reaction occurs during the mixing of these gases, the spread of the combustion reaction in the whole mixing vessel can be suppressed, which makes it possible to prevent the device from being damaged by the combustion during the mixing of the gases, enabling improvement in safety of the device.

Problems solved by technology

However, mixed gas in a premixture state in which these gases have been fully mixed is within a combustion range, and even in the mixed gas in a diffusive mixture state where these gases are not fully mixed, areas within the combustion range dispersedly exist, and therefore, there is a risk that an abrupt combustion reaction may occur during or after the mixing of the gases, due to the supply of ignition energy originating from, for example, pipe friction, backfire from the catalyst layer, or the like.

Under such circumstances, it has been an important issue to develop a safe gas mixing device capable of suppressing the progress of such combustion reaction even if the combustion reaction occurs.

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