A method and device for absorbing hydrazine gas in a closed space

Abstract

The invention provides a method and device for absorbing hydrazine class gas in confined space. The method for absorbing the hydrazine class gas in the confined space includes the following steps that firstly, a high-pressure fan A is used for transferring the hydrazine class gas in a sealed storage tank to a gas temporary storage tank; secondly, hydrazine class mixed gas is absorbed in a gas absorption tank through a gas-liquid mixing pump; thirdly, the adsorbed gas is blown into an activated carbon adsorption tank through a gas-liquid separation tank under the effect of the high-pressure fan, and the gas is exhausted in a harmless mode after being absorbed again. The device for absorbing the hydrazine class gas in the confined space mainly comprises the high-pressure fan A, the gas temporary storage tank, the gas-liquid mixing pump, the gas absorption tank and a PLC. The high-pressure fan A, the gas temporary storage tank, the gas-liquid mixing pump, the gas absorption tank and the PLC are sequentially connected, and the hydrazine class gas in the confined space can be efficiently absorbed. The method is advanced, operation is easy and convenient, and the automation degree and safety coefficients are very high; meanwhile, the device is miniaturized in design and capable of being mounted on a vehicle and improving treating flexibility of waste hydrazine class gas.

Description

technical field [0001] The invention belongs to the technical field of waste gas treatment, and in particular relates to a method and device for absorbing hydrazine gas in a closed space. Background technique [0002] When using hydrazine substances in industry, the purity requirements are generally very high. In order to prevent hydrazine substances from being oxidized and deteriorated during storage, hydrazine substances are generally stored in closed tanks and filled with nitrogen in the tank space. Protect. When storing hydrazine substances, it is generally required to maintain a certain positive pressure in the tank to achieve the purpose of isolating the air. When operating and using hydrazine substances, the tank generally needs to be pressurized. After the operation is completed, in order to clean the storage tank or relieve the pressure in the tank, the mixed gas in such a closed space needs to be discharged. Since hydrazine substances are generally volatile, As a...

AI Technical Summary

Problems solved by technology

The spraying absorption method is designed with spraying equipment in the absorption tower to spray the absorption liquid into many fine droplets to increase the gas-liquid contact area and complete the absorption of waste gas. The waste gas generally enters from the bottom of the absorption tower and flows from the top of the absorption tower Excluded. At present, there are reports on the use of spray absorption towers in domestic hydrazine gas treatment. Spray absorption towers generally use acetic acid solution as the absorption liquid. In order to achieve complete absorption of waste gas, the device generally requires 2 to 3 absorption towers in series. Large volume, complicated operation

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