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Positive pressurized VFD control panel for variable speed decanter centrifuge

As one the lead decanter centrifuge
manufacturers in the world, GN solids
control( with branch office GN solids America in Houston) provide both high
speed decanter centrifuge and variable speed decanter
centrifuge with VFD control panel, VFD decanter centrifuge the most popular
model during our clients from over 60 countries in the world.

We provide 4 types VFD control panel of
decanter centrifuge based on different clients requirements:

1 positive pressurized VFD control panel for
explosion proof Exd II BT4 with PLC control

2 positive pressurized VFD control
panel with IEC certificate with PLC control

3 positive pressurized VFD control panel with
ATEX certificate with PLC control

4 flame proof/ explosion proof control panel

The positive pressurized VFD control panel is
specially designed for the working site with high temperature, moist air, heavy
rain, strong sunshine area with good performance. To ensure the long operation
life, we also suggest to use a sun/rain proof cover on top of the centrifuge
unit, as GN
drilling waste management project in Sichuan, China, Where is a lot of rain
and very moisture air.

With air cooler inside the control cabinet, we
have a temperature sensor installed and setting according the environmental
temperature and client’s requirement, once the inside temperature reached the
setting value, the cooler unit will start to work and feed to the inside
cabinet cold air and let the warm air out, the constantly circulation make the
inside cabinet to remain the respectively cool and will not be too hot during
long term working in the hot weather.

PLC control VFD control panel change the
frequency smartly, the last flame proof/ explosion proof control panel can not
work in hot weather, the electric components will be too hot to stop working or
be burned when it becomes hot. And the frequency inverter is working through
very traditional way. Such products are only supplied to the cold area or when
cheapest price is required by the client.

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Solve temperatures raise a problem for decanter centrifuge

Solve temperatures raise a
problem for decanter centrifuge

Decanter
centrifuge operation in proper RPM speed is the basis for normal
operation.  Operation reach above normal
temperature and cannot come down is a major concern for decanter centrifuge
operation.

Normal
operation temperature for decanter centrifuge is around 104 degree F.  It is normal when change the new oil from the
old, lubricants and turn the decanter centrifuge on, the temperature will be
raised up but later will be going down.
If the temperature does not go down, then there will be some place that needs
to be checked.

The
first ting need to check is  the level of
oil and lubricants in the gearbox and bearing when the decanter centrifuge is
not on.  Not enough oil and lubricants
will not grease the moving parts and gears in high speed operation will cause
grinding that lead to permanent damage.
The other side of problem if too much oil and lubricants will cause the
flow  not flowing properly between gear
and parts.  The air and oil mixing ratio
is not balanced will cause a temperature rise and not coming down as well.

Flush
the oil in the
gearbox of
Decanter centrifuge by turn the box upside down and drain all the
oil out.  When the oil is completely out,
turn the filler hole to 10 o clock position and fill the gearbox oil.  When filling the oil show the sign of
overflowing oil, it is filled with enough oil and should stop.  Close the draining plug and do not topping
the gearbox oil.  

Turn
the decanter centrifuge on and do the first temperature check.  Then it needs to check very 15 minutes to get
the gearbox and bearing uprising temperature curve.  Two hours later, after turn the decanter
centrifuge on, the temperature should reach to the top and start to show signs
to go down to 104 degree F.  

If the temperature does not come down after 2
hours, stop the machine and open up the drain plug.  Take the compressor connect with hose and
trigger and blow the air into the drain plug.
During the filling of the new gearbox oil, it might mix with air to
create air bubbles in the gear box.
Eliminate the air bubbles and turn the decanter centrifuge back on will
result the temperature comes down to normal operating temperature.

 

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Solve temperatures raise a problem for decanter centrifuge

Decanter
centrifuge operation in proper RPM speed is the basis for normal
operation.  Operation reach above normal
temperature and cannot come down is a major concern for decanter centrifuge
operation.

Normal
operation temperature for decanter centrifuge is around 104 degree F.  It is normal when change the new oil from the
old, lubricants and turn the decanter centrifuge on, the temperature will be
raised up but later will be going down.
If the temperature does not go down, then there will be some place that needs
to be checked.

The
first ting need to check is  the level of
oil and lubricants in the gearbox and bearing when the decanter centrifuge is
not on.  Not enough oil and lubricants
will not grease the moving parts and gears in high speed operation will cause
grinding that lead to permanent damage.
The other side of problem if too much oil and lubricants will cause the
flow  not flowing properly between gear
and parts.  The air and oil mixing ratio
is not balanced will cause a temperature rise and not coming down as well

Flush
the oil in the gearbox by turn the box upside down and drain all the oil
out.  When the oil is completely out,
turn the filler hole to 10 o clock position and fill the gearbox oil.  When filling the oil show the sign of
overflowing oil, it is filled with enough oil and should stop.  Close the draining plug and do not topping
the gearbox oil.  

Turn
the decanter centrifuge on and do the first temperature check.  Then it needs to check very 15 minutes to get
the gearbox and bearing uprising temperature curve.  Two hours later, after turn the decanter
centrifuge on, the temperature should reach to the top and start to show signs
to go down to 104 degree F.  

If the temperature does not come down after 2
hours, stop the machine and open up the drain plug.  Take the compressor connect with hose and
trigger and blow the air into the drain plug.
During the filling of the new gearbox oil, it might mix with air to
create air bubbles in the gear box.
Eliminate the air bubbles and turn the decanter centrifuge back on will
result the temperature comes down to normal operating temperature.

Modular Drilling Cuttings Waste Management Equipment for China TOP Oil Company

Since recent
months, China as many other countries as established more strict laws for
forbidden the drilling cuttings from the Oil and Gas drilling projects to be
discharged directly to the outside or anywhere else. They call them zero
discharge solutions, such solutions should be used for treating the drilling
cuttings in order to protect the environment.

Just like this
jobsite of CNPC, it is located among the farmlands and not far away from the
town. But they have found a rich oil reserve in this long time existing
farmland. Energy resources have to be explored, meanwhile, the farmlands must
to be well protected. Therefore an effective way to treat the drilling cuttings
is an urgent and very necessary solution.

They, like many
other clients of GN Solids Control chose GN waste management
systems as option and GN equipments are proved to have good
performance. Just in last year, GN Solids Control has sold around 20 sets of drilling
cuttings waste management systems to both domestic companies in China and also
abroad, clients including Baker Hudges, Shell and other world famous companies.
Most of them purchased standard GNDC series drilling cuttings waste management
systems including vertical cuttings dryer, high speed decanter centrifuge,
screw conveyors and screw pumps.

Some other
companies chose instead independent equipments per their special need and
applications, like GNLW363CG Decanter Centrifuge, they are using it as
centrifuge for treating the oily sludge on a telescopic skid, or for a
dewatering centrifuge used together with a dewatering unit, like for NIDC and KOC.

This year, for
providing most of clients’ special requests, GN Solids Control has designed
some modules for waste management. When they are used singly, they play roles
as dependent equipment for their original functions, and when they are used and
laid together, they could easily form a complete system. And during
transportation, they can easily to transport in containers.

Like in some
cases, normally you use vertical cuttings dryer and centrifuge is enough. But when
you need a high G shaker in between the above mentioned 2, you don’t have to
change to another system, just add some pipelines into it and locate a shaker
module at a suitable position.

Sources and Sizes of Drill Mud Solids

There are 2 main sources of drill solids
particles are the chemical additives and formal drilling cuttings, the drilling
cuttings are containments that degrade the performance of drilling mud. The
drilling particles will be ground into smaller and smaller and become more and
more difficult to remove from drilling mud if the drilling cuttings that not removed as per guide. Most of the
formal drill solids will be able to be removed by mechanical ways by drill
solids separate equipment and small drill particle will be very difficult to
remove and will have a great effect on drilling mud properties than the very
larger drill solids particles . The solids particle size in drilling mud
incorporated into drill mud will be range from 1 to 250 microns.

 The clay, colloidal and bentonizte will be
size between 1 to 5 microns, silt, barites and fine cement dust will be 6 to 44
microns, fine sand will be between 44 to 74 microns, API sand will be 105 to
149 microns, coarse sand can be 500 – 1000 microns, coarse that larger than
2000 microns, there will be colloidal that bellow 2 microns.

Drilling solids particles are the main contaminant
in the drilling mud, so the control of the importance of the good solids
control including increased the penetration rate and reduce mud cost, reduce
water requirement, reduce mixing problem, reduce differential striking, etc.
The drilling solids removal is important to keep drilling mud recycling and re-use.
The
main equipment for drill solids removal are shale shaker , desander, desilter, decanter centrifuge and there will be other
machine assistant to meet separation application including mud tank, centrifugal pump, valve and pipeline.