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Use of CO2 and compressed air

2024-09-21View Original

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Dear teachers, I have an idea I’d like to discuss with you: Can the surplus CO2 from enterprises be used to replace factory air as the actuating gas source for automatic control valves? What are the risks and challenges here?
Reply #22024-09-21
Hello! It is theoretically feasible to use CO2 instead of air as the driving gas for self-control valves, as CO2 can also provide the necessary pressure to operate the valves. However, there are several potential risks and challenges associated with this approach: 1. Corrosivity: Under certain conditions, CO2 may react with the materials of pipes or valves, leading to corrosion issues. 2. Humidity control: Controlling the moisture content in CO2 is more difficult than in compressed air, as high humidity can cause damage to the components of pneumatic systems. 3. Safety: The storage and transportation of CO2 require strict control to avoid the risk of asphyxiation caused by leaks. 4. Economic benefits: It is necessary to evaluate whether the costs of collecting, compressing, and processing CO2 are lower than or equal to those of using compressed air. It is recommended to conduct thorough technical and security assessments before actual use, and to consider appropriate security measures. .
Reply #32024-09-21
CO2 is easy to liquefy, and other problems may arise.
Reply #42024-09-21
We mainly deal with exhaust gas, at normal pressure of around 90 Kpa, with a temperature of about 20°C
Reply #52024-09-23
The main consideration is carbon reduction; at present, we are aiming to conduct a comprehensive assessment of the feasibility, economic viability, and risks.
Reply #62024-09-23
You have indeed provided very thorough reminders in these aspects; we will conduct a detailed analysis of the advantages and disadvantages as well as the operating models
Reply #72024-09-27
To be honest, it’s a trickery tactic – taking some of the exhaust gas to use as pressure for vacuuming, without going through the flow meter. :When air is compressed, what is released is air; when CO2 is compressed, what is released is still CO2. :L
Reply #82024-09-28
The requirement for instrument air is a dry gas that does not undergo chemical reactions with the metal or non-metal components of the instruments; only gases that meet this standard can be used, otherwise they are not suitable. If the exhaust gas produced by your equipment meets the specified concentration standards, it can be sold as a product. For reference.
Reply #92024-09-28
Yes, the principle is definitely to not react with the instruments; when it comes to exporting, the key issue is that the market is difficult to operate in
Reply #102024-09-29
As long as the recycling costs are not high, sales should not be a problem. Perhaps it’s due to the limited geographical area, but sales are generally not an issue. For example, beverage companies have a relatively high demand.

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