Furniture factory guys, avoid the trap! Wrong dust-removal side channel blower cost me over 20k in half a year.
We manufacture solid wood furniture. Last year, in a hurry to pass the environmental protection inspection, we bought an 18.5KW side channel blower to connect to the dust removal pipeline. However, using it turned out to be full of problems, and we ended up losing over 20,000 yuan in total:
The air volume was too large! There are only 3 cutting workstations in the workshop, but we bought a blower with "10,000 m³/h air volume". The wind in the pipeline "scurried around", which instead blew the dust all over the workstations. We were fined 12,000 yuan during a random environmental protection inspection.
The wind pressure was miscalculated! The pipeline has 5 bends and is connected to 3 dust collection hoods. Actually, it needs a wind pressure of 30kPa, but the one we bought only has 22kPa. As a result, the dust collection hood at the end of the pipeline couldn't suck in the dust, and wood chips piled up in the pipeline. We had to stop work once a week to clean it, and the total loss from work stoppages added up to over 8,000 yuan.
We didn't consider filter matching! The fan's suction was sufficient, but the filter cartridge wasn't the "anti-clogging type". The solid wood dust stuck to the filter cartridge, which got clogged in 3 days, causing the fan to overload and trip. Later, we spent another 1,500 yuan replacing the filter cartridge...
In the end, I contacted the manufacturer DEREIKE. They provided me with a replacement of a suitable ring blower and also took the initiative to explain the installation process to me.
Now we've replaced it with an 11KW one, with parameters calculated based on "the number of workstations + pipeline length", and it finally meets the standards. I want to ask my fellow furniture factory colleagues:
• When choosing a dust removal fan, do you calculate the parameters yourself or ask the manufacturer to help calculate them?
• Have you ever encountered a situation where "the fan power is sufficient, but the dust removal effect is still poor"? How did you solve it?
• During environmental protection inspections, what exactly is the standard for dust concentration to avoid being fined?