Multi-channel metal palladium or palladium alloy composite membrane hydrogen separator

Abstract

The invention discloses a multi-channel metal palladium or a palladium alloy composite membrane hydrogen separator. A graphite sealing ring is adopted to connect and seal the multi-channel metal palladium or the palladium alloy composite membrane and a metal joint at any position in a section of an outer surface membrane. In order to better realize sealing connection, any position in a section where the outer surface and one end have a 3-50mm distance on the adopted multi-channel metal palladium or palladium alloy composite membrane is provided with a groove or a gradient exists along the outer surface membrane and is formed at a position having a 10-80mm distance from the end through concaving, so that the multi-channel metal palladium or the palladium alloy and the metal joint can be insealing connection more closely. The metal joint and a separator shell are connected to form the hydrogen separator. When the metal joint and the separator shell are connected to form the hydrogen separator, at least one metal joint at one end of the two ends is connected with a metal pipe capable of buffering the stress of expansion caused by heat and contraction caused by cold so as to release the stress in the heating and cooling processes. The hydrogen separator has the advantages of obviously low device investment and separation cost for medium and small-scale hydrogen separation.

Description

Technical field [0001] The invention relates to a metal palladium or palladium alloy composite membrane hydrogen separator with a multi-channel structure. Specifically, one or more multi-channel metal palladium or palladium alloy composite membranes are used to connect and seal with a metal joint , And then connect with the separator shell through the metal joint to form a hydrogen separator. The hydrogen separator is more suitable for small and medium-scale hydrogen separation. Background technique [0002] As we all know, hydrogen has a wide range of uses in refineries and the chemical industry, and is mainly used in the following processes: [0003] ·The fertilizer industry produces synthetic ammonia; [0004] ·Synthetic methanol; [0005] ·Hydrocracking, hydrodesulfurization, hydrorefining, hydrodealkylation; [0006] ·Food industry oil hydrogenation and pharmaceutical industry hydrogenation; [0007] ·Rocket fuel; [0008] ·Fusion welding; [0009] ·Reduction of metal ore; [0010] ...

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Problems solved by technology

However, since the multi-channel palladium composite film and the metal shell are completely fixed together, and because the thermal expansion coefficients of the multi-channel palladium composite film and the metal shell are different, in the process of heating and cooling, there will inevitably be a certain degree of friction at the graphite gasket. leakage, making it difficult to practically apply

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