Separation, purification and recovery process of hydrogen in industrial waste gas

Abstract

The invention discloses a separation, purification and recovery process of hydrogen in industrial waste gas. The process comprises the following steps that A, after being pressurized by a waste gas pressurizing device, hydrogen-containing industrial waste gas is led into a hydrogen storage alloy container; B, the hydrogen storage alloy container is heated by a hydrogen storage alloy container heating device to reach the temperature of 200-400 DEG C, the temperature is kept for two hours, and then the hydrogen storage alloy container heating device stops heating; C, after the hydrogen storage alloy container is cooled to 20-200 DEG C, an exhaust device is turned on, and the exhaust device is turned off when residual gas in the hydrogen storage alloy container is discharged until pressure inthe hydrogen storage alloy container is lowered to 0.001 Mpa; and D, the hydrogen storage alloy container is heated by the hydrogen storage alloy container heating device to reach the temperature of300-450 DEG C, an exhaust valve is opened, and hydrogen released by hydrogen storage alloy in the hydrogen storage alloy container is discharged into a recovery device. The purity of the recovered hydrogen is greater than 99.999%, recovery safety efficiency is high, and the recovered gas can be reutilized.

Description

technical field [0001] The invention belongs to the field of resource recovery, in particular to the separation, purification and recovery of industrial hydrogen-containing waste gas. Background technique [0002] Under normal temperature and pressure, hydrogen is an extremely flammable, colorless, transparent, odorless and tasteless gas. Hydrogen is the gas with the lowest density known in the world. The density of hydrogen is only 1 / 14 of that of air, that is, at 0°C and under one standard atmospheric pressure, the density of hydrogen is 0.0899g / L. Hydrogen is the substance with the smallest relative molecular mass and is mainly used as a reducing agent. In industry, hydrogen is generally produced from natural gas or water gas, instead of using high energy-consuming electrolysis of water. The produced hydrogen is widely used in the cracking reaction of the petrochemical industry and the production of ammonia. Hydrogen molecules can enter the crystal lattice of many meta...

AI Technical Summary

Problems solved by technology

However, due to the special requirements of hydrogen for storage and transportation, the cost of using hydrogen for industrial enterprises remains high

In addition, in the process of using hydrogen, enterprises usually use hydrogen in the form of air flow, and the flowing hydrogen is directly discharged into the atmosphere, which not only results in low hydrogen utilization rate, but also increases the cost of hydrogen used by enterprises. At the same time, the discharged hydrogen will also reduce the atmosphere. sexual pollution

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