Category: decanter centrifuge

Control of the Thickness of the Liquid Ring Layer of Decanter Centrifuge

GN Company is manufacturer of Decanter Centrifuge from China Mainland, and has capability of manufacturing decanter centrifuge with bowl size 220mm, 360mm, 450mm, 550mm, 650mm, and 760mm.

GN Technical Team has about 10 years’ experience on decanter centrifuge and has continuously improved GN product. Here is some experience shared by GN Technical Team. When the amount of sludge is constant, the thicker the liquid ring layer, the longer the sludge is separated in the liquid ring layer, and the more sludge will be separated. On the other hand, the thickening of the liquid ring layer reduces the possibility of some disturbed small particles being lost with the separation liquid.

Combining the above two aspects, the thickening of the liquid ring layer generally improves the solid recovery rate of dehydration.

However, the thickening of the liquid ring layer will correspondingly shorten the drying area, so that the sludge separated from the liquid ring layer will not have sufficient time to be “dried”, so the solid content of the mud cake will decrease.

When controlling the thickness of the liquid ring layer, a trade-off should be made between the high solids recovery rate and the solids content of the mud cake. Unless the dewatered sludge needs to be incinerated, in general, there is no need to pursue an excessively high solid content in the mud cake, and the higher the solid recovery rate, the better, so the thickness of the liquid ring layer should be increased as much as possible.

Welcome to contact GN Sales Managers and they would supply one stop turnkey solution based on clients’ project.

Best & Regards,

Kevin Liu

Regional Manager
GN Separation & Conveying

Hebei GN Separation & Conveying Equipment Co.,Ltd
Tel:+86-316-5276988/9
Mob (WhatsApp/Wechat): +86-15810901775
Email: Kevin@gnseparation.com

GN China: www.gnseparation.com (Langfang/Beijing)
GN USA: www.gnsolidsamerica.com (Houston, Texas)
GN Russia: www.gnseparation.ru (Moscow City)

GN Company Supplied Decanter Centrifuge for African Client

GN Company has been a professional manufacturer of Decanter Centrifuge for about 10 years, and now has capability to manufacture Decanter with bowl size from 220mm~760mm, and treatment capacity 1 m3 per hour to 120 m3 per hour.

The decanter centrifuge is a spiral unloading sedimentation centrifuge. It is mainly composed of a high-speed rotating drum, a screw conveyor with a hollow shaft and a differential with the same rotation as the rotating drum and a slightly lower speed than the rotating drum. When the suspension to be separated is sent into the drum by the hollow shaft, it is immediately thrown into the drum cavity under the action of the centrifugal force generated by the high-speed rotation.

The high-speed rotating drum generates strong centrifugal force to sling the solid particles with higher density than the liquid phase on the inner wall of the drum to form a solid layer (because of the ring shape, called the solid ring layer); due to the low density of water, the centrifugal force is small Therefore, the liquid layer can only be formed inside the solid ring layer, which is called the liquid ring layer.

Due to the different rotation speeds of the screw and the drum, there is a relative movement (that is, the difference in rotation speed) between the two. The relative movement of the screw and the drum is used to slowly push the sludge in the solid ring layer to the cone end of the drum and pass through the drying zone. After that, it is continuously discharged from the outlets distributed around the circumference of the drum; the liquid in the liquid ring layer is continuously discharged from the weir to the outside of the drum by gravity to form a separated liquid.

Best & Regards,

Kevin Li

Regional Manager
GN Separation & Conveying

Hebei GN Separation & Conveying Equipment Co.,Ltd
Tel:+86-316-5276988/9
Mob (WhatsApp/Wechat): +86-15810901775
Email: Kevin@gnseparation.com

GN China: www.gnseparation.com (Langfang/Beijing)
GN USA: www.gnsolidsamerica.com (Houston, Texas)
GN Russia: www.gnseparation.ru (Moscow City)

GN Company Supplied Decanter Centrifuge for African Client

GN Company is a professional manufacturer of Decanter Centrifuge, and is capable to supply decanter with bowl diameter from 220mm to 760mm.

The decanter centrifuge is a spiral unloading sedimentation centrifuge. It is mainly composed of a high-speed rotating drum, a screw conveyor with a hollow shaft and a differential with the same rotation as the rotating drum and a slightly lower speed than the rotating drum.

When the suspension to be separated is sent into the drum by the hollow shaft, it is immediately thrown into the drum cavity under the action of the centrifugal force generated by the high-speed rotation.

The high-speed rotating drum generates strong centrifugal force to sling the solid particles with higher density than the liquid phase on the inner wall of the drum to form a solid layer (because of the ring shape, called the solid ring layer); due to the low density of water, the centrifugal force is small Therefore, the liquid layer can only be formed inside the solid ring layer, which is called the liquid ring layer.

Due to the different rotation speeds of the screw and the drum, there is a relative movement (that is, the difference in rotation speed) between the two. The relative movement of the screw and the drum is used to slowly push the sludge in the solid ring layer to the cone end of the drum and pass through the drying zone. After that, it is continuously discharged from the outlets distributed around the circumference of the drum; the liquid in the liquid ring layer is continuously discharged from the weir to the outside of the drum by gravity to form a separated liquid.

Welcome to contact GN Company, and they would offer one stop turnkey solution for clients’ project.

Best & Regards,

Kevin Liu

Regional Manager
GN Separation & Conveying

Hebei GN Separation & Conveying Equipment Co.,Ltd
Tel:+86-316-5276988/9
Mob (WhatsApp/Wechat): +86-15810901775
Email: Kevin@gnseparation.com

GN China: www.gnseparation.com (Langfang/Beijing)
GN USA: www.gnsolidsamerica.com (Houston, Texas)
GN Russia: www.gnseparation.ru (Moscow City)

GN Company Supplied Decanter Centrifuge for European Client

Recently client from Europe ordered one unit of Decanter Centrifuge for olive oil processing, with capacity about 10 m3 per hour.

GN Company has been a professional manufacturer of Decanter Centrifuge for about 10 years, with capabilities to manufacture Decanter Centrifuge with bowl diameter from 220mm to 760mm, and capacity from 1~2 m3 per hour to 120 m3 per hour.

When the clients come to GN for new projects, the Engineers always suggest the clients to answer a professional questionnaire, in order to find out the best model for clients’ project.

The questionnaire mainly includes questions as follow.
1. What is the main purpose of separation, and capacity requirement? For example, solids dewatering, solid-liquid separation, or solid-liquid-liquid separation. GN Engineers need to consider 2-phsae or 3-phase Decanter/Separator for clients’ projects.
2. What is the make-up of feeding inlet? What is the liquid phase and solids phase, and where are they from?
3. What is solid content percentage in the feeding inlet? It’s better to calculate the percentage by volume, instead of weight. Solids content plus capacity requirement can help engineers to find out the exact model. GN Company now is capable to manufacture 760mm bowl diameter decanter, with capacity 100~120 m3 per hour.
4. What is the solid particle in the feeding inlet? Engineers shall consider if it is necessary to add pre-treatment equipment, which can remove coarse particles. For example, 10mm particles.
5. What is the client requirement after treatment by Decanter Centrifuge? Some clients need the outlet cake to be as dry as possible, some clients need the outlet liquid to be clean, and some other clients choose between them.

There are some other details, which shall be put high attention on, for example, if the Decanter shall be explosion proof or not, if the feeding inlet has high corrosive (for example, high content of chloride), etc.

Welcome to contact GN Sales Managers, and they would offer one stop turnkey solution for your project.

Best & Regards,

Kevin Liu

Regional Manager
GN Separation & Conveying

Hebei GN Separation & Conveying Equipment Co.,Ltd
Tel:+86-316-5276988/9
Mob (WhatsApp/Wechat): +86-15810901775
Email: Kevin@gnseparation.com

GN China: www.gnseparation.com (Langfang/Beijing)
GN USA: www.gnsolidsamerica.com (Houston, Texas)
GN Russia: www.gnseparation.ru (Moscow City)

GN Company Supplied Decanter Centrifuge for European Client

GN Company has been a professional manufacturer of Decanter Centrifuge for about 10 years, with capabilities to manufacturer Decanter with bowl diameter from 220mm~760mm, and treatment capacity from 1 m3 per hour to 120 m3 per hour.

Besides 2-phase Decanter Centrifuge, GN Company is also capable to manufacture 3-phase Decanter Centrifuge, which is used for solid-liquid-liquid separation. 3-phase Decanter Centrifuge has two rotors, including drum and screw. When the drum and screw rotate at high speed, there would create centrifugal force, which is many times bigger than gravity. So the particles would be separated from the liquid, and settle on the inner wall of the drum. Because the screw rotates at slower speed than drum, therefore the solids would be pushed out from the slag outlet. The liquid would form two separate layers, because of the difference of density. The heavy phase layer would drawn against the wall of drum by the centripetal pump, and would be discharged from heavy-phase outlet. The light phase layer is close to the spiral end, and discharged by overflow. The whole process is continuous and highly automatic.

The material touch part of GN 3-phase Decanter Centrifuge is made of high grade duplex stainless steel, which is much better than SS 316 in strength and corrosion resistance. The Solids Discharge Port is protected by Tungsten Carbide Insert. The bearings are from international reputable brand, and clients can find spare parts easily from local market.

Welcome to contact GN Sales Managers, and they would offer one stop turnkey solution based on clients’ requirement.

Best & Regards,

Kevin Liu

Regional Manager
GN Separation & Conveying

Hebei GN Separation & Conveying Equipment Co.,Ltd
Tel:+86-316-5276988/9
Mob (WhatsApp/Wechat): +86-15810901775
Email: Kevin@gnseparation.com

GN China: www.gnseparation.com (Langfang/Beijing)
GN USA: www.gnsolidsamerica.com (Houston, Texas)
GN Russia: www.gnseparation.ru (Moscow City)