IMPROVEMENTS IN AIR PURIFICATION UNITS

摘要

A liquid air energy storage system (LAES) comprises an air liquefier 100, 110, 120, a liquid air storage facility 130 for storing the liquefied air, and a power recovery unit coupled to the liquid air storage facility. The air liquefier comprises an air input, an adsorption air purification unit (APU) 110 for purifying the input air, and a cold box 120 for liquefying the purified air. The power recovery unit comprise a pump for pressurizing the liquefied air from the liquid air storage facility; an evaporator for transforming the high-pressure liquefied air into high-pressure gaseous air; an expansion turbine capable of being driven by the high-pressure gaseous air; a generator for generating electricity from the expansion turbine; and an exhaust for exhausting low-pressure gaseous air from the expansion turbine. The exhaust is coupled to the adsorption air purification unit such that at least a portion of the low-pressure gaseous air exhausted from the expansion turbine is usable to regenerate the adsorption air purification unit. Also claimed is a method of operating such a system and an air purification unit.