Method and device for absorbing waste chlorine generated in lithium production process by utilizing iron powder

Abstract

The invention relates to a method and device for recovering chlorine, particularly to the method and device for absorbing waste chlorine generated in lithium production process by utilizing iron powder. The device comprises a chlorine collector, a heat exchanger, an absorber, a chlorination furnace and a condenser, wherein the chlorine collector is arranged on an anode of an electrolytic bath; an outlet on the upper end of the chlorine collector is connected to a heat source inlet of the heat exchanger; a heat source outlet of the heat exchanger is connected to an air inlet on the bottom of the absorber; a liquid inlet on the top of the absorber is connected to concentrated sulfuric acid; an air outlet of the absorber is connected to the air inlet of the chlorination furnace; the top of the chlorination furnace is an iron powder inlet; a slag hole is arranged on the bottom of the chlorination furnace; the upper part of the chlorination furnace is provided with a chlorination furnace air outlet; the chlorination furnace air outlet is connected to the condenser; and a discharge outlet is arranged on the lower part of the condenser. By using the method and device using the technical scheme, the environmental pollution problem of waste chlorine in the lithium production process is solved, the chlorine resource is recovered and saved, and the economical efficiency is supplied.

Description

technical field [0001] The invention relates to a method and a device for recovering chlorine gas, in particular to a method and a device for using iron powder to absorb waste chlorine gas generated during lithium production. Background technique [0002] Molten chloride electrolysis is a common method for preparing lithium metal. The recovery and treatment of chlorine gas generated by the anode has always been a headache for the lithium metal smelting industry. Chlorine gas is chemically active, easily soluble in water, has an unpleasant pungent smell, seriously endangers human health, and has serious corrosion on metal equipment or buildings. The continuous production of lithium electrolysis industry produces a large amount of chlorine gas, which must be treated and absorbed as much as possible, otherwise it will greatly damage the environment. [0003] The existing treatment method is generally to lead out the chlorine gas in the electrolytic cell through a gas-collectin...

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Problems solved by technology

[0003] The existing treatment method is generally to lead out the chlorine gas in the electrolytic cell through a gas-collecting device under fully sealed conditions. The effective chlorine gas content is about 7.5%, and the temperature is about 60 ° C. It is passed into the lime for reaction, and then discharged. This not only causes chlorine water to pollute the factory area and the surrounding environment, but also causes a waste of chlorine resources, resulting in large economic losses

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