Molybdenum disulfide production waste gas treatment device and method

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 method for treating waste gas produced by molybdenum disulfide. 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 not properly treated and discharged, it will pollute the atmosphere and seriously affect the living environment of the surrounding residents. At present, the treatment of waste gas in domestic and foreign industrial production is mainly liquid absorption purification method. The components undergo chemical reaction to achieve the purpose of separating harmful substances from the exhaust gas and purifying the exhaust gas. [0003] The existing waste gas treatment equipment of the molybdenum disulfide production line is an absorption tower, and the absorbent of the acid-base neutralization absorption method is sodium hydroxide. In the process pri...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a treatment method for waste gas from 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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