Innocent treatment method for mercury-containing waste tube

Abstract

The invention relates to the improvement on an innocent treatment method for a mercury-containing waste tube. The method is characterized by comprising the following steps of: crushing the waste tube in water; performing at least three processes of washing, namely water washing, dilute nitric acid washing and water washing on the crushed tube in turn; separating and removing mercury on tube fragments; separating tube head metal from glass fragments through magnetic separation, wherein the whole treatment process is linked up in an airtight way and is performed in a sealed state; performing air draft guidance on gas emitted from the water surface under negative pressure; performing water and dilute nitric acid drip washing; and filtering and separating the mercury by using silver-carried activated carbon or sulfur-carried activated carbon, and discharging. The method has a simple and practical process, is energy saving, is suitable for automatic operation, and has the advantages of lowcost, simple and practicable process and the like; and by the method, the mercury is not released to the outside, and automatic treatment can be realized.

Description

technical field [0001] The invention is an improvement on the harmless treatment method for mercury-containing waste lamp tubes, and in particular relates to a harmless treatment method for mercury-containing waste lamp tubes with simple treatment, low cost and no pollution. Background technique [0002] Waste mercury-containing lamp tubes need to be treated separately because they contain mercury. In the prior art, there are usually two types of methods for treating mercury-containing lamp tubes: dry method and wet method. [0003] Dry process: The entire treatment process is completed under a vacuum-closed system, and a vacuum-closed container is used to condense and collect the discharged gas. A small amount of gas that cannot be condensed is removed with an activated carbon filter. For example, Chinese patent CN101587809 waste fluorescent lamp mercury harmless treatment and recycling method, a, put the waste fluorescent lamp in a sealed bucket, heat and pulverize it, ma...

AI Technical Summary

Problems solved by technology

The advantage of the wet process is that the treatment cost is low, and the disadvantage is that the waste gas generated during the crushing process is large, which not only requires extremely high equipment sealing, but also has a large amount of waste gas treatment and high cost; secondly, metal sorting is located in the previous process and is manual. Sorting, the mercury vapor in the material cannot be guaranteed not to overflow during sorting, and there is mercury in the sorting metal; the third waste gas and wastewater treatment process is relatively complicated; the entire process design is complicated, and it is difficult to realize fully automatic control

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