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Unusual sound happen on operation of decanter centrifuge

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Loud sounds made from machine now become part of occupation hazard for works who expose it in extend of time period.  It how have regulate by government  because the consideration of the machine design. 

GN Solids America LLC's decanter centrifuge is the machinery with rotating bowl and contain many number source of sounds .  The size of the machine, the speed of the rotating bowl, which is the main source of noise come from structure.  Other sound like turbulence sound and siren sound is also part of sound production from the decanter centrifuge

Structure sound often produce by all surfaces that directly coupled to the bowl's bearing.  The speed of rotation of the bowl, it create turbulence from the different trailing edges that produce broad spectrum vortex sound.  The siren sound is from air flow through the bowl and it produce great noise especially  at the lower harmonics of the bowl rotate frequency.

There are ways to decrease sound that produce by decanter centrifuge, some of them are:

·         Decoupling the surface of the main bearing of the rotating bowl and will reduce the amount of noise transmitted from the decanter centrifuge structure

·         Polish and smooth the bowl surface will minimize the noise produce from the edge that vortices that shed and produce vortex, turbulence noise

·         Siren sound produce because from the air flow through rotating bowl, which is the purpose to the function  of the decanter, the exit opening should be design so the noise is produce within the parts of spectrum of sound have low noise level

The sound that produce from machinery is consider health hazard if personal consistently exposure on sound that is great then 80 to 85 dB over an eight hours per day.  Excess expose of level of 85 dB during work life would result 90% of people suffer lost of hearing.  It can also damage the way of speech as well.  Which now sound regulation is the must enforce regulation. 

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500GPM HDD Mud Recycling System by GN Solids America LLC

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Solids control machinery manufacture GN Solids America LLC have manufacture facility in China, has been leading exporter to 75 plus countries.  Over year passing by, The R&D of solids control machinery from standard issue to currently fully customize machinery.  One customize product we have offer is mud recycling system and we manufacture it from scratch to finished.  Under the various mud recycling system we have manufacture, the 500 GPM mud recycling system for  HDD Drilling, Tunneling, along with different kinds of drilling activities outside of oil field drilling, which is the GN Solids America's main focus market.  The 500 GPM mud system includes three model GNMS-500B, GNMS-500G, GNMS-500GL. GNMS-500B is a two phase cure mud system, while the other two models we manufacture are three phase mud treating system.

GNMS-500B mud system includes a desilter mini cleaner with two deck screens to attain phase two mud treating effect. The bottom decks will be used as first treatment with 40 nylon uppers screen to separate coarse solids from the spent mud, after which the liquids will be piped to the desilter cyclones for any second stage treatment simply by removing particles size like 20 microns. The mud agitator is installed for continuous mixing the treated drilling mud. 

GNMS-500G and GNMS-500GL use a single shale shaker to change the bottom deck screen associated with GNMS-500B as the first level solids control treatment , and drilling operators will have mud cleaner with the combined desander hydrocyclones and desilter hydrocyclones respectively as the next stage of solids control treatment machine and also 3rd stage treatment as well. Also there will be mud agitators to mixing the treated mud. The only difference between GNMS-500G and GNMS-500GL is the size of the mud tank that will be use.

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GN Solids America LLC's desilter

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The desilter is the third step control equipment of the whole solid control system. Desilter function is to deal with the solid debris with diameter of 15-44um, and to ensure a proper treatment of the processed drilling mud in the next step.


Initial preparation of the desilter

Put the desilter base horizontally and use four pressing plates to fix the base on a suitable place of the tank. Take a note that the outlet of screen box should be 20-30mm out of the tank.
Connect the inlet and outlet holes by hose or steel tube. The inlet pipe needs to be fit with outlet pipe.

Loose four vibration bolts. When transport, the bolt need to be secure.
Check there is any bolts that are loose. Check the vibration rotating axis is moving smooth. If there is any fault noise, the problem should be solved at that time. After all the initial check that all things are function properly, the equipment can be starting to work. 
Connect the belt with motor and turn on the power, check whether the rotating direction of motor is correct.

The operation of desilter

Start with the shale shaker first, then turn on the desilter. Check whether the exhaust pressure can match the requirements and check the results of separating, check whether there is any possible of leaking.
Check the rotating direction of motor is consistent toward to the arrowhead on the shield.
Check the pressure gage works properly in an allowed pressure range.
Adjust the bottom flow nuts to make the bottom flow jets shoot the mud out smoothly.
When stop the operation, the drilling fluid should be cleaned out to avoid solidification. Clean the shaker screen with water and check each part.

The maintenance of desilter

Check and confirm the connection and sealed parts.
Check the cyclone cylinder to see the jet situation and pressure.
Repair or change the damaged, leaking or abraded cyclone cylinder.
Check whether the jet nozzle is broken. Check the inside of the cyclone cylinder and if need, change the damaged parts.
Clean the feed head.
When stop using for period of the long time, every part that contains drilling fluid should be cleaned through, avoid stockpile of sand inside the equipment.
The lubricating grease should be injected into the vibration motor every 1500-2500 hours. The volume to be injected each time is 5-10ml.
When stop using, the shaker screen should be cleaned with water to avoid solidification to ensure max useful screen life.

 

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GN Solids America's GNLW series drilling fluid centrifuge needs details

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The centrifugal force separation principle of drilling fluid for the drilling industry. 

The liquid-solid separation process of the liquid and solids parts is done by the roller of the bowl.  The proven theory of separation by driven of bowl in high speed rotating cycle that creates centrifugal force and gravity.  The drilling mud is thrown to the cylinder wall to form a circle of liquid, solid particles in the liquid ring due to greater than gravity centrifugal force in hundreds and thousands of times.  It's overcome the mud viscosity resistance rapid subsidence to the drum wall and begins forming solid layer, the liquid formed liquid layer. The ratio of the centrifugal force and the self gravity of the solid particles in the liquid ring is the detail that separation factor of the drilling fluid centrifuge, and the separation factor of the large drilling fluid centrifuge can separate the finer particles from the slurry.

Different bowl speed creates different purpose of recovery.  A low speed drilling fluid centrifuge use as "barite recovery drilling fluid centrifuge". The separation factor is about 500 to 700, for low density solid, the separation point for 6 ~ 10 um, for high density solid, separation point 4 ~ 7 um.

Mid-range rotate bowl drilling centrifuged separation factors for about 800, separable solid 5  um, for removing the harmful solid mud, mud density and viscosity control. This is at present the largest rig drilling fluid centrifuge.

High speed drilling fluid centrifuge factor is about 1200~2100, separation point 2 to 5 u m, for the removal of harmful solid and control the viscosity of the slurry, high speed drilling fluid centrifuge separation of solids to be discharged out of the tank and liquid return in the circulatory system.   

 

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500GPM Mud Recycling System

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Solids control machinery manufacture GN Solids America LLC have manufacture facility in China, has been leading exporter to 60 plus countries.  Over year passing by, The R&D of solids control machinery from standard issue to currently fully customize machinery.  One customize product we have offer is mud recycling system and we manufacture it from scratch to finished.  Under the various mud recycling system we have manufacture, the 500 GPM mud recycling system for  HDD Drilling, Tunneling, along with different kinds of drilling activities outside of oil field drilling, which is the GN Solids America's main focus market.  The 500 GPM mud system includes three model GNMS-500B, GNMS-500G, GNMS-500GL. GNMS-500B is a two phase cure mud system, while the different two are three phase mud treating system.

GNMS-500B mud system includes a desilter mini cleaner with two times deck screens thus to attain a 2 phase mud treating effect. The bottom decks will be used as first period treatment with 40 nylon uppers screen to separate coarse solids from the spent mud, after which the liquids will be piped to the desilter cyclones for any second stage treatment simply by removing particles size like 20 microns. The mud agitator is installed for continuous mixing the treated drilling mud. 

GNMS-500G and GNMS-500GL use a single shale shaker to change the bottom deck screen associated with GNMS-500B as the first level solids control treatment , and drilling operators will have mud cleaner with the combined desander hydrocyclones and desilter hydrocyclones respectively as the next stage of solids control treatment machine and also 3rd stage treatment as well. Also there will be mud agitators to mixing the treated mud. The only difference between GNMS-500G and GNMS-500GL is the size of the mud tank that will be use.