Device and method for processing waste gas from molybdenum disulfide production

Abstract

The invention relates to a device for processing waste gas from molybdenum disulfide production. The device comprises an alkali tank, a buffer tank, a vacuum pump and an emptying tower which are sequentially connected through pipelines, wherein the alkali tank comprises an alkali tank 1#, an alkali tank 2# and an alkali tank 3# which are sequentially connected through pipelines. The method comprises the steps of enabling the waste gas to sequentially flow through an NaOH solution in the alkali tank 1#, the alkali tank 2# and the alkali tank 3# to absorb a great amount of NOx and a small amount of volatile HCl and HF in the waste gas, absorbing the small amount of NOx by virtue of urea in the buffer tank, and discharging the processed gas through the emptying tower. According to the device, the waste gas is directly absorbed and processed by virtue of NaOH, and the tail gas is supplementarily absorbed by virtue of the urea, so that an absorption effect cannot be influenced due to the crystallization of alkali liquid after the device is used for a long time; besides, the alkali tank and the buffer tank are antiseptic by virtue of a rubber lining technique, and the vacuum pump is arranged behind the buffer tank, the vacuum pump cannot be corroded by the processed waste gas, and the utilization rate of equipment is improved.

Description

technical field [0001] The invention belongs to the technical field of waste gas purification, and in particular relates to a molybdenum disulfide production waste gas treatment device, and also relates to a method for using the device to treat molybdenum disulfide production waste gas. Background technique [0002] The waste gas produced by the molybdenum disulfide production line mainly includes HCl, HF, H 2 O, NO x If it is discharged without proper treatment, it will pollute the atmosphere and seriously affect the living environment of the surrounding residents. At present, the treatment of waste gas in industrial production at home and abroad is mainly the liquid absorption purification method, which uses the different solubility of each mixed component in the waste gas in the selected absorbent, or one or more of the components are active with the absorbent. The components react chemically to achieve the purpose of separating harmful substances from the exhaust gas a...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a waste gas treatment device for molybdenum disulfide production, which solves the problem that the waste gas absorption efficiency of the existing absorption tower decreases after a period of operation, and the problem of failing to meet the environmental protection waste gas treatment requirements

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