Process for preparing high-purity hydrogen by purifying palladium alloy membrane

Abstract

The invention relates to a process for preparing high-purity hydrogen by purifying a palladium alloy membrane, which comprises the following steps: enabling crude hydrogen to pass through a desulfurization adsorption bed, a particle filter, a heater and a booster pump, then enabling the crude hydrogen to enter a metal palladium alloy membrane separator, and exchanging heat of outlet gas of a primary separator to an inlet through a heat exchanger; when the intercepted gas of the first-stage separator is introduced into the second-stage separator to be purified to a certain purity, converging the purified gas into an inlet gas pipeline of the first-stage separator, and using the regenerative heating furnace for recycling waste gas heat to further improve the energy utilization rate. The process is simple, clean and energy-saving; the prepared hydrogen is suitable for fuel cells, semiconductor devices, precise instruments and the like. Meanwhile, the requirement on the raw material gas isnot high, the used skid-mounted equipment is convenient to move, and high-purity hydrogen can be obtained by directly taking industrial hydrogen production as a raw material to realize on-site purification.

Description

technical field [0001] The invention belongs to the field of hydrogen membrane separation and purification, in particular to a hydrogen membrane separation and purification process. Background technique [0002] With the reduction of fossil energy and the arrival of bottlenecks in the development of power battery energy, as well as the excellent characteristics of hydrogen as a secondary energy source, such as good combustion performance, high efficiency, clean and pollution-free, and no greenhouse effect, the government and research institutions are paying attention Transferred to the direction of hydrogen energy. Recently, the National Development and Reform Commission and the National Energy Administration issued the "Energy Technology Revolution Innovation Action Plan (2016-2030)" within the system, and at the same time released the "Energy Technology Revolution Key Innovation Action Roadmap", proposing 15 key innovation tasks, Including technological innovations in cle...

AI Technical Summary

Problems solved by technology

PSA equipment requires a lot of investment, small operating flexibility, high operating pressure, and no obvious advantages in terms of reinvestment and safety.

In the metal membrane separation process directly without PSA, in order to obtain a higher hydrogen recovery rate, a higher operating pressure is generally selected, and the intercepted gas is directly discharged or burned (with an open flame), the safety is questionable and the energy cannot be fully utilized.

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