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Hydrazine waste gas absorption liquid

A technology for absorbing liquid and waste gas, which is applied to the separation of dispersed particles, chemical instruments and methods, and separation methods, etc. It can solve the problems of high equipment maintenance costs, slow reaction speed, and large amount of ozone usage, and achieves low human toxicity. Simple, less harmful to the human body

Active Publication Date: 2011-07-06
北京航天凯恩新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has a better treatment effect, but the amount of ozone used is large, requiring huge ozone generating equipment
Large capital investment and high equipment maintenance costs
[0013] Hypochlorite treatment method, this method is not effective in treating high-concentration hydrazine sewage, and is prone to produce secondary pollutants such as nitrosodimethylamine and formaldehyde, and the reaction speed is slow

Method used

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  • Hydrazine waste gas absorption liquid

Examples

Experimental program
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Effect test

Embodiment 1

[0042] A hydrazine waste gas absorption liquid, the main components of the absorption liquid are: 2.5% citric acid, 0.03% potassium sorbate, 15% calcium chloride, 15% calcium nitrate, 15% sodium nitrate, 15% ethylene glycol, 15% ethanol %, 5% acetic acid, and the balance is water.

[0043] The hydrazine waste gas absorption liquid is prepared according to the following method: add about half the volume of water to be prepared into the container, start the stirring device at a speed of 90 rpm, and add citric acid, potassium sorbate, calcium chloride, and calcium nitrate in sequence , sodium nitrate, ethylene glycol, ethanol and acetic acid, each material is added at a rate of 2.5kg / min, after all the solid materials are added, add water to the volume to be prepared; continue stirring for 30min and then stop; after standing for 1h, filter to remove residue and Insoluble matter, the obtained clear liquid is the absorption liquid.

Embodiment 2

[0045]A hydrazine waste gas absorption liquid, the main components of the absorption liquid are: 0.2% citric acid, 0.1% potassium sorbate, 0.2% calcium chloride, 25% calcium nitrate, 10% sodium nitrate, 25% ethylene glycol, 0.5% ethanol %, 0.2% acetic acid, and the balance is water.

[0046] The hydrazine waste gas absorption liquid is prepared according to the following method: add about half the volume of water to be prepared into the container, start the stirring device at a speed of 80 rpm, and add citric acid, potassium sorbate, calcium chloride, and calcium nitrate in sequence , sodium nitrate, ethylene glycol, ethanol and acetic acid, each material is added at a rate of 2.0kg / min, after all the solid materials are added, add water to the volume to be prepared; continue stirring for 30min and stop; let stand for 1h and filter to remove residue and Insoluble matter, the obtained clear liquid is the absorption liquid.

Embodiment 3

[0048] A hydrazine waste gas absorption liquid, the main components of the absorption liquid are: 5% citric acid, 0.05% potassium sorbate, 25% calcium chloride, 0.2% calcium nitrate, 25% sodium nitrate, 0.2% ethylene glycol, 25% ethanol %, 8% acetic acid, and the balance is water.

[0049] The hydrazine waste gas absorption liquid is prepared according to the following method: add about half the volume of water to be prepared into the container, start the stirring device at a speed of 90 rpm, and add citric acid, potassium sorbate, calcium chloride, and calcium nitrate in sequence , sodium nitrate, ethylene glycol, ethanol and acetic acid, each material is added at a rate of 3.0kg / min, after all the solid materials are added, add water to the volume to be prepared; continue to stir for 30min and then stop; after standing for 1h, filter to remove residue and Insoluble matter, the obtained clear liquid is the absorption liquid.

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Abstract

The invention relates to hydrazine waste gas absorption liquid, which comprises the following main components in percentage by weight: 0.01-15 percent of citric acid, 0.01-1.0 percent of potassium sorbate, 0.01-45 percent of calcium chloride, 0.01-45 percent of calcium nitrate, 0.01-45 percent of sodium nitrate, 0.01-20 percent of acetic acid and the balance of water; and preferably, the hydrazine waste gas absorption liquid further comprises following main components in percentage by weight: 0.01-45 percent of at least one of ethylene glycol and alcohol. The absorption liquid is prepared by following steps: adding water with volume half of that of the absorption liquid to be prepared in a container, starting a stirrer, sequentially adding, the citric acid, the otassium sorbate, the calcium chloride, the calcium nitrate, the sodium nitrate, the ethylene glycol, the alcohol and the acetic acid, adding water again to the volume to be prepared after all solid materials are added, continuously stirring for 30 minutes and stopping, and filtering residuals and insoluble matters after standing for one hour, thus obtaining clear liquid, namely, the absorption liquid.

Description

technical field [0001] The invention relates to the field of waste gas absorption and treatment, in particular to a hydrazine waste gas absorption liquid. Background technique [0002] Hydrazine is a high-energy liquid fuel with excellent performance, which is highly toxic, flammable and explosive. If the concentration of hydrazine substances in the air is too high, it will cause air pollution, endanger the surrounding crops, and cause the death of bee colonies. [0003] At present, the commonly used hydrazine waste gas treatment mainly has the following methods: [0004] Water absorption treatment method, using ordinary water to carry out the absorption treatment experiment of unsymmetrical dimethylhydrazine waste gas, the results show that when the concentration of unsymmetrical dimethylhydrazine is lower than 100mg / L, the absorption rate is greater than 93%; when the concentration is 100-500mg / L, the absorption rate is The absorption rate is about 90%; when the concentr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/78B01D53/72
Inventor 程永喜孙兆懿闫捷徐超李进华孟洪波
Owner 北京航天凯恩新材料有限公司
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