Electric preheating and constant temperature membrane separation device for producing high-purity hydrogen

Abstract

The invention discloses a film separating device for producing high-purity hydrogen by electric heating. A plurality of palladium film components are arranged between two blank flanges of the device; synthesis gas circulating frames are arranged among the blank flanges and the palladium film components, and among palladium film components; graphite gaskets are arranged between the blank flange and the synthesis gas circulating frame, and between the synthesis gas circulating frame and the blank flange; the synthesis gas circulating frame is a quadrate frame with a cavity in the centre; the quadrate frame forms a closed space with the blank flange or the palladium film component; a hydrogenous synthesis gas lead-in pipe and a hydrogenous synthesis gas lead-out pipe are arranged on the synthesis gas circulating frame; lug bosses are arranged around the synthesis gas circulating frame; grooves are arranged on the four walls of the synthesis gas circulating frame; electric heater strips are arranged in the grooves; and the external surfaces of the electric heater strips are provided with insulating heat preservation materials. The film separating device directly introduces the hydrogenous synthesis gas into both sides of the palladium film component, has the advantages of compact design, small volume, convenient disassembly, quick heating speed, and good temperature control effect, and can continuously produce high-purity hydrogen with high hydrogen transmission rate.

Description

technical field [0001] The invention relates to a membrane separator with compact structure and easy expansion, which is used for separating and producing high-purity hydrogen from hydrogen-containing synthesis, especially relates to a membrane with electric preheating, constant temperature, easy heating and good temperature control effect Splitter. The device can produce high-purity hydrogen from hydrogen-containing mixed gas. Background technique [0002] At present, 90% of the hydrogen in the world comes from the reforming of hydrocarbons (natural gas, coal, biomass, etc.), purification after chemical processes such as gasification or cracking, and the purification of synthesis gas is one of the key processes. Available purification techniques include: pressure swing adsorption, polymer membrane separation, palladium membrane separation, low temperature separation, etc. Compared with other separation technologies, palladium membrane separation can produce high-purity hy...

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Problems solved by technology

[0010] Chinese invention patents (200710031743.5, 200810029464.X) involve adding micro-scale heating channels on the palladium membrane module. This method has a fast heating rate and saves materials. Difficulties

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