TBM is short of tunnel boring machine, which is one kind big equipment for the tunnel excavation. It is widely used in the subway tunnel ,and some other traffic project. When boring tunnel, the rig temperature will raise quick and also there will be lots of drilling cutting in the front of rig machine. So this machine need to use drilling mud to flush the drill bit for cooling. And also the mud will take out the drilling cutting out tunnel. As usually,the TBM project need large water, if we do not treat these mud. It will be series pollution and waste water.
Last week we delivered one desander and one GN decanter centrifuge for the TBM project. This desander was equipped bottom shaker. When the slurry feed into hydrocyclone, the liquid will be separated out under the separation force, and the solids will down to bottom shaker. The shaker could generate more than 7 G force with high frequency of vibration. The contained liquid and solids will be separate and follow into the mud tank.
As usually,the desander only can treat the particle bigger than 60 um, the TBM require the liquid as much clear as better. So we add the decanter centrifuge for further separation. GN 453 decanter centrifuge has be exported to many countries and served TBM project , which capacity is 60m3/hour. Decanter centrifuge is one kind equipment that utilize the G force that generated under the high rotated speed to reach the solids liquid separation. As we all know, the solids density is bigger than water. When the material bear big G force, the different density solids and liquid will separate layers, the bottom solids and top layer of liquid. Mud after decanter centrifuge , the solids content of discharged liquid will less than 5%, which is totally can be reuse for TBM.
GN has been in separation for more than 15 years. We have full experience and stable quality , if you you interest in our separation equipment , please contact us , we will be pleased to provide technical support.
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Published: 27 January 2021
With more then 15 years development ,GN Decanter centrifuge has developed several series for different application. At the beginning of GN history, we main served drilling company for the drilling mud treatment. Actually Decanter centrifuge has widely application in different country. GN T series is spec developed for the material dewatering.
As the client requirement, we made the experiment of mineral salt separation. This client want to got the solids salt as much dryer as possible. According to client the material parameter that our client provided, we mixed the same liquid with same solids content. From the photo we can see, the discharged white solids is dryer enough and it reached the requirement of our client. The discharged water is also clear enough for reusing.
GN C series decanter centrifuge have vanity model according to the treating capacity. They are 224,364,454,554. The treating capacity from 6m3/hour to 120m3/hour. Client can choose they model according to the quantity they will treat. 224 series is the most popular model with the mini size and low maintaining fees. Our Decanter centrifuge used the double stainless steel for centrifuge assemble to improve anti-wear and lifetime. In the solids discharged port, installed the tungsten carbon steel to prevent the abrasion from solids. Decanter centrifuge is one kind of high speed equipment, the rotated speed can reach 5000 rpm, the balance is the big challenge for manufacture, which required high accuracy. Every centrifuge assemble will pass 3 balance testing, include the dynamic balance. The high manufacture accuracy and strictly balance test can make sure the machine is the beast work state when delivery to our client.
The mineral salt separation is just one kind application. Decanter centrifuge can treat most material that need solids liquid separation. Through the centrifuge force generated under the high rotate speed, solids and liquid will bear different G force and finish the separation. If you have project need Decanter centrifuge ,welcome to contact us. We can make the separation experiment for you and share our experience.
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Published: 20 January 2021
With the development of GN, we have accumulated lot of experience and technology about the solids-liquid separation. Not only drilling mud treatment,but also some other industries such as food industry, beverage industry, biological material extraction, waste water treatment etc. Decanter centrifuge and other solids control equipment as our featured machine, which has stable quality and get good feedback from our client. But most time the shale shaker,mud cleaner are used to treat the mud with high solids content ,and it can not be used in food industry. GN Screw press dewatering machine are developed for low solids content material treatment. Last week we delivered out GNDN-202 model screw press to Peru for the food material dewatering.
Screw press utilize reduce the space and press the material to reached the dewatering purpose. The main body of the screw press sludge dewatering machine is a filtration device composed of fixed ring and moving ring, in which the screw axis runs through. The
front section is for concentration and the back section for dewatering. The filtering gap formed between the fixed ring and the moving ring of the dewatering screw press and the pitch of the screw axis gradually decreased from the concentration section to the dewatering section.The rotation of the screw press shaft pushes the sludge from the concentration section to the dewatering section,through reduce the gap to press the material and dewater the sludge.
As usually, Screw press dewatering is good performance to treat the material that solids content less than 5%, for some tiny particle, we suggest to add flocculant to combine the tiny particle into big. Which can help to get the best separation effect.
Compare with decanter centrifuge, screw press is energy-saving , it has low electric consumption, and it is very suitable to treat some material with soft solids. We have several modes that capacity from 0.5m3-52m2/hour, if you want to know more about our screw press dewatering machine, please feel free to contact us.
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Published: 12 January 2021
2020 is almost over, and we are happy to welcome the Christmas coming. Merry Christmas and Happy New Year to everyone. 2020 was really tough time for everyone. We experienced the Oil pricestumble and corona virus, and we are still suffer the bad influence. However, wish the new year will bring new start.
As the branch of GN, we really appreciate our GN HQ give much support to help us defend the corona virus. As we all know mask is very short as the begin of virus break out, not only in USA, but all over the word. GN HQ tried best to get the mask and sent it to GN American. We also provide masks to our client with our able to do. Solids control is main business one GN, the slump of oil price affect much to oil gas industry, but GN sales only small effect, because the global strategic layout, and the amazing productivity. We still keep delivering goods to customer in time even under the effect of virus. Especially our shaker screen get a sale growth due to the good quality. And we also benefit from the separation business, GN Solids America provide lots separation equipment to mining industry, waste water treatment plant. Our Decanter centrifuge is more and more popular in North America market.
We had made ahead plan for 2021. GN has powerful technical department ,and we are good at provide the customized solution for different project. Our sales team will utilize GN advantage to provide better service to our client and develop more business on separation industry, especially some municipal project and environmental protect such as the tunnel boring, trenchless ,waste water treatment etc. Our separation equipment such as shale shaker,decanter centrifuge are very suitable to these project.
We are looking forward the new year’s coming and hope there all our client have a good holiday and happy new year.
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Published: 30 December 2020
As we know, at the begin of GN funding , we main serve the oil gas industry, and made the solids control equipment to treat the drilling mud for oil well drilling company. As the the company development and the technology accumulation, we upgrade our equipment to adapt different project. Such as the trenchless project ,tunnel boring, horizontal direction drilling and some other municipal engineering. Trenchless and TBM both most time also will use the mud to improve the drilling efficiency. Last week we provide 3 set mud jet mixer for treachless project.
These equipment used for China domestic project. Form the photo we can see, it include mud hopper,centrifuge pump , mud tank and electrical control panel. This is one mini mud mixing system, this design is convenient to transfer to different project site, especially when we work on city. The mud hopper used to dump mud material like cement, barite etc... it has a venturi design to generate the suck pressure to make sure the material can feed into tank and mix with water quickly. The second main equipment is centrifuge pump. GN centrifuge pump casting used ductileiron to anti wear and keep the long lifetime, the pump parts are 100% interchangeable with Mission pump. This is also convenient for our client to buy the replaced part in local market.
When the mud mixer working, the centrifuge pump suck the liquid from tank, then dump mud material into mud hopper ,material will mix with liquid through venturi ,and back into tank. There is also equipped mud agitator, the agitator can prevent the solids settle on bottom and keep the mud property. This system capacity is about 90m3/hour, and the tank volume is 6 m3,for some small project, which is enough as a mud buffer tank.
For most trenchless project, which do not need explosion proof ,but we do can provide Atex, IECex ,CNEX these different ex proof standard. If you have demand on these equipment, welcome to contact us for more information.
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Published: 23 December 2020