Regarding whether energy conservation and consumption reduction can lead to an expansion of the sewage blower pipeline
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Hello, masters! I have a question for everyone. Our company operates PTA plants, and both stages of the wastewater treatment process use blowers for aeration. However, the aeration volume in the second stage of AO treatment is relatively low. (There is no connection between the aeration pipelines of the first and second stages of AO treatment.) The blower has a power capacity of 500 KW, making it a major electricity consumer. Is it possible to add a connection between the aeration pipelines of these two stages in order to save energy and reduce consumption? There are sufficient reasons to convince the management to do this. (The distance between Level 1 AO and Level 2 AO is quite large.) I don’t have sufficient theoretical arguments to convince my superiors; does anyone here have adequate theoretical or practical evidence? Thank you to all the masters!
This question will help you shift to the water treatment sector for better communication
Calculate the distance between the two locations, conduct an investment and energy-saving analysis, and determine how long it will take to recoup the investment
The distance is fairly large, around 300 meters I guess; considering the long-term benefits in terms of energy savings and reduced consumption, the advantages are quite obvious!
I’m not quite sure; I wonder how the original poster managed to achieve energy savings and reduced consumption. The power of the blower is determined by the volume and pressure of air supplied, which are primarily determined by the oxygen demand of the biochemical processes and the water depth. Since the oxygen demand and water depth are fixed, does the owner mean that the current oxygen-supplying capacity of the blower exceeds the oxygen demand of the biochemical processes?
Do you mean that the aeration volume in Stage 1 AO is too high, and some air needs to be sent to Stage 2 AO? Typical blowers have a low pressure head, so a distance of 300 meters might be too long.
Distance is not an issue; if the first-stage fan has sufficient airflow, considering adding a frequency converter or operating it intermittently is an option
Isn’t a 500KW blower equipped with an inverter? If a frequency converter is installed on the blower, adjusting the frequency of that converter based on the dissolved oxygen level in the aerobic tank can also help save energy.
And what is the air resistance of a 300-meter-long pipeline? The blower of Stage 1 AO supplies oxygen to Stage 1; will there still be enough oxygen left to supply Stage 2 AO after passing through 300 meters of pipeline?
If you want to save energy, you might consider magnetic levitation blowers; our company has used one for experiments, and it’s still in good condition after half a year. The power is reduced by half.
It’s a good idea, but it’s not possible to simply increase or decrease the aeration volume based on the two pools – the losses in between would be significant. It’s necessary to calculate the theoretical values based on the actual distance before submitting them to management for approval.