Dust Collection

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Dust collector motor

12/1/17       
Dropout Member

Hi All.

Has anyone here used a diesel or other type of engine to power the fan of a dust collector?

Electricity here is getting crazy expensive and it looks like a natural gas engine would be about half the operating cost. I'd get heat from it as well.

12/2/17       #2: Dust collector motor ...
Bill

Where is that and what is the kWh cost?

12/3/17       #3: Dust collector motor ...
Dropout Member

$0.17 per kwh and going up.

12/3/17       #4: Dust collector motor ...
Bill

Wow that is high. I don’t think an engine is the way to go over time maintainance cost would eat up the savings.

You might look at a gate system with an inverter. That will be as efficient as possible while maintaining good collection. It’s not cheap I am sure but worth a look.

Where is power .17 a kWh?

Ecogate

12/3/17       #5: Dust collector motor ...
Dropout Member

Ontario Canada.

Thanks. I check that out.

12/22/17       #6: Dust collector motor ...
Jerry

Maybe look into this:

https://www.capstoneturbine.com/

1/4/18       #7: Dust collector motor ...
cabinetmaker

We are moving to vfd's on all machines and looking @ 2 new compressors with vfd's designed into them to read and supply air @ the freq needed. I have programmed the vac pump and collector on the router to both "sleep" when clearing the table and come back up to 56hz on the pump and about 48 or 49 on the collector, did the math and the payback is insanely fast we pay the same rate, and if you are base on 1/2 hour the machine sometimes run 16 minute nests to 13 minute unload, clean and reload .....

Our stone shop use crazy amounts with the polishers and the corian guys kill the bander and cnc during serious deadlines. We have a rotary screw and rotary vane currently and can't do anything with them currently with adding vfd's but can replace them with built in vfd's

1/5/18       #8: Dust collector motor ...
Dropout Member

Hey cabinetmaker, how do you keep the velocity in the main duct up when you slow down the collector?

Are you seeing real results in your hydro bill from vfd's on the vacuum pumps? I have spoken to a few people and they say that it's a waste of time because the vacuum pump is essential doing no work when the inlet valve is shut off.

I have rotary screw and a liquid ring pumps.

1/5/18       #9: Dust collector motor ...
cabinetmaker

It's actually a formula of finding the sweet spot on the equipment to know exactly what freq you run them @ for the same performance, but every reduction in freq is a savings.

The idea is the motors are all over built for worst case scenarios, full load mentality, when in fact we rarely get use that capacity. In our case, it is across the line starts with the 40HP pump and of course the consumption. It does let off some of the draw, but it is still running un necessarily for load unload

I was looking at soft starters and then after a lot of research I came across some Danfoss VFD literature and other information about studying the process and just decided we would send a signal to automatically send them in sleep mode, this is the 15hp collector and the pump, during load/unload and cleaning. Using the automation of the VFD the operator is out of the equation

we just did this

We are in the process of going from 6k watts in flourescent to 2k in LED bulbs, and from a 2 ton central air system to Mitsubishi split systems for the AC

I was looking to kill the peak demand charges and by skinning the cat all around with consumption reduction, we can petition if we can get our kwh reduction in line, for a demand charge to be reduced

We have already reduced our trash expense 1700 a year in better planning, 7000 in workmans comp, and now we are looking @ the electric for 6k this year

Anyway we got a Akron edgebander and it has blower on it that runs the compressor non stop, we have to turn the air off to it while not in use.

Then the damn granite guys run the daylights out of the compressors for polishing

I started doing the math, it's definitely the big consumers, but it's all across the board for a reduction, especially when we realized the ac runs 24/7 in the office because the vac pump is such a heat producer it taxes the ac.

Anyway, I bought 2 used VFD's on ebay @ a substantial savings


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