How to balance acetylene clear liquid
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The current environmental situation is extremely severe. May I ask how the liquid levels are balanced in acetylene production among all of you in the industry?
When the production load is high, it can be directly reused in the acetylene generation system; however, when the load is low, it can only be discharged after treatment. :)
It is acceptable for the purified waste liquid to return to the generator
After treatment, it can be fully recycled as water for acetylene generation. This approach is probably used in most current wet-process methods
In acetylene production, the filtrate obtained from calcium carbide slurry filtration is cooled and reused as water for the reaction process. The purified water can be used for this purpose, but the calcium carbide sludge contains high levels of chloride ions, which affects its suitability as a component in cement
Haven’t you been reusing the clear liquid all this time?
Here, since we do not consider using calcium carbide slag in cement production, both the supernatant from the calcium carbide slag and the cleaned waste sodium hydroxide solution are sent back directly to the production system for reuse.
Theoretically, 0.85 tons of water are consumed to produce 1 ton of PVC; therefore, producing 330 tons of PVC per day requires 280 tons of water. To achieve balance in water usage, it is crucial to control the amount of water used in each process. For example, water such as that used for sealing machines can be recycled and utilized, and the wash towers can use the supernatant fluid from previous cycles for spraying. Through various technical improvements, it is possible to achieve a balance in water usage.
We achieve 100% reuse. As for the cleaning solution, considering the requirements regarding chloride concentration when using calcium carbide slag as a cement raw material, it can be treated in wastewater treatment plants!
As the friends from Sichuan have pointed out, domestic companies have made considerable efforts in the recycling of the supernatant fluid resulting from calcium carbide slag. Based on their own characteristics, they have identified and implemented various effective methods for utilizing this fluid. However, repeated use leads to the accumulation of harmful impurities such as chlorides, which affects the composition of the calcium carbide slag used as a raw material in cement production as well as the grade of the cement produced. Therefore, it is necessary to properly treat a portion of this supernatant fluid in order to effectively remove the impurities that could impact subsequent processing steps. Thus, it is quite important to explore ways of dealing with these harmful impurities that affect the recycling of the supernatant fluid. :handshake Last edited by limingshuguang on 2009-4-14 15:57]