Problems with sodium hypochlorite configuration in acetylene process
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In the acetylene process, sodium hypochlorite was configured with chlorine alkali and water in the old process. Now it is configured directly with concentrated sodium hypochlorite and water or with dilute sodium hypochlorite (waste sodium hypochlorite after treatment). Let's discuss the advantages and disadvantages of each configuration, and what is the corresponding sodium hypochlorite circulation volume when the acetylene flow rate is high? ? ? This post was last edited by hhl817 on 2008-2-21 09:07 ]
The former is to produce sodium hypochlorite through a chemical reaction. The key is the proportion, especially the proportion of chlorine.； The latter is simply dilution. I don’t know whether the dilute sodium you are talking about is clean waste sodium or fresh dilute sodium. If it is waste sodium, its composition is more complex and difficult to process. There are problems with the accumulation of various elements, especially the accumulation of chloride ions.
I feel that the two methods of preparation are similar. The preparation of chlorine alkaline water should prevent chlorine leakage, and the preparation of concentrated sodium hypochlorite should prevent the leakage of sodium hypochlorite. I don't feel much difference. There is no linear relationship between the ratio of acetylene and sodium hypochlorite. It is mainly affected by impurities such as sulfur and phosphorus contained in acetylene. Our factory uses calcium carbide from different origins, and the supplementary amount of sodium hypochlorite differs by more than twice.
When recycling waste sodium, the accumulation of phosphorus and sulfur needs more attention.
The new method directly utilizes the by-product hypochlorous acid, has a simple preparation process and does not require the consumption of fresh caustic soda and chlorine. If a certain amount of fresh water is added to make up for the evaporation and the amount of water taken away with the calcium carbide mud, part of the sulfur and phosphorus may be taken away with the calcium carbide mud, so it will not accumulate.