Call: (800) 442-6648
This machine is designed to do jobs
that are too small or inaccessible for large hydraulic dredges. It
works like an underwater snow blower with a feeder mixer in a
shroud and a pump attached directly to the back of the shroud.
Instead of mixing and feeding snow into a blower which blows the
snow to the side, it mixes and feeds mud and sediment into a pump
that discharges it through a pipeline.
Like all pumping equipment, the size
is designated by the discharge diameter. The Muck Grinder has a 6"
open impeller, trash/sewage, abrasion resistant, hydraulic motor
driven pump, and a 6" discharge pipe.
This pump design has been used for
25 years to bypass sewage, and empty plugged sewage digesters. It
will pass soft drink/beer cans, rags, and similar trash objects.
Because of the hydraulic motor drive a hard object can jam the pump
without damage. The inlet of the pump is open to the shroud so the
object can be removed without disassembly.
All working parts are very hard and abrasion resistant. There
are no internal seals, so reasonable wear does not affect the
performance. Unlike a hydraulic dredge, entrapped gas does not
affect the pump performance because there is no vacuum line or
area. The material being pumped is always under pressure.
The pump is designed with a very
violent pre-entrance spiral to assist the solids into the pump. No
damage can be done by cavitating the pump. The pump can be
completely disassembled and re-assembled with common hand tools.
The pump bearings are lubricated with gun grease and there is no
The minimum pump design criteria for
this application is 1000 gpm @ 50' tdh. This was achieved on the
prototype with the 50HP engine. Expected performance with the more
powerful engine (60 HP) is 1000 gpm of water @ 60' tdh.
The pump can easily pump sludge 2000' with a 20' head. The
standard boom at 45° will go down to a depth of 143". Extending to
deeper depths, 4' extensions can easily be added in the field using
One cubic yard is 202 gallons. 1000
gpm is 5 cubic yards of water per minute.
The production of this equipment
depends on the ability to excavate the material and the ability of
the pump to carry it away. Normal slurry discharge rate is 800 gpm.
That would be 4 cubic yards gross slurry per minute. Sandy slurry
at 20% solids by volume would be .8 cubic yard per minute. Sandy
slurry at 15% solids by volume would be .6 cubic yard per minute.
Organic slurry @ 50% solids by volume would be 2 cubic yards per
minute. Other fine grain slurry @ 30% solids by volume would be 1.2
cubic yard per minute.
Hourly or daily production would
depend upon how many minutes could be actual discharge time. The %
of solids in the slurry is determined by the forward travel
velocity of the machine.
The machine travels on a static
cable strung on the path of the desired travel. As that cut is
finished the cable is indexed over to get the next pass. This
allows absolute control and a flat bottomed cut. The windlass or
travel pulleys on the dredge are hydraulic motor driven and the
travel velocity is infinitely variable from 0 to 100 fpm. Normal
function would be to remove material on the forward pass at 1 to 3
fpm, and back up at a rapid speed. Sometimes a "cleanup pass" is
made on the way back.
Very thick discharge slurry travels
more slowly in the pipeline, but the % of solids is higher, so the
removal rate is fairly constant. The slurry has to be fairly wet
for the polymer to make proper contact and get good dewatering.
The working depth is determined by lowering the
pump and shroud by winch cable. The shroud and pump are mounted on
the boom, which is the discharge pipe and hinged at the back of the
machine. The boom and shroud is 16 feet long. Very normal operating
conditions to 7 or 8' deep. Deeper than this is very doable, but
production usually suffers because it is not as easy to control.
The boom can easily be extended with hand tools for very deep
The shroud has built in jets for
assistance excavating sandy or chelaeted materials. These jets are
powered by a separate pump [3" trash pump] on the deck. This really
improves production and takes a lot of strain off the cable and the
The floatation of the machine is 2.14
to 1 weight ratio for stability. The floats are compartmented
stainless steel. All other parts are powder coated.
The 60 HP Cummins diesel is smooth and
quiet. It makes less noise than a lot of grass cutting
The pump has its own hydraulic
circuit, separate from the other functions. The engine and
hydraulic systems are protected with Murphy shut down systems. The
hydraulic system has its own cooler.
Start up and training usually takes 3
days or less.
Full throttle fuel consumption is 3
gph or less.
The machine weight: 3000 lbs.; Overall
Length: 17'; Hull length: 14'; Width: 66"; Height: Less than 4'
Water Displace: 12"; The unit will
float in 9" of sludge or water
At this time, we do not currently have
any Muck Grinder units available for rent or loan. Starting
price for just the Muck Grinder unit is
$98,659.00. Hoses, trailer, training, etc. are
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