Category Archives: Uncategorized

Dewatering Screw Press Package Sent to USA for Sewage Treatment

News from GN company this week: Recently, a set of dewatering screw press and Chemical Dosing Unit have been manufactured and are ready to start serving for an Sewage Treatment project in the USA, including one set of screw press GNDL-402 and two sets of 500L Chemical Dosing Units.

To make sure these sets of dewatering screw press and Chemical Dosing Unit will provide a reliable performance and the parts and components of all the equipment will run smoothly for a long term operation, our technical department, production department and quality control department have paid a lot of attention to the material selection, material preparation, every step of production and the inspection for this set of equipment in each step.

GN Solids Control is one of the most famous International Brand for Mud Solids Control System & Drilling Waste Management. GN have the one stop for Solids Control Solution for mud recycling projects.

If you need any support about the operation and maintenance of GN’s equipment like dewatering screw press and Chemical Dosing Unit, please feel free to contact GN company for our engineers’ best experience and knowledge in the relevant industry. We will do our best to assist your project because just in this way we can establish a stable and long term cooperation. And we can provide on-line support and site instruction for specific situation if needed.

As a leading manufacturer of separation equipment and conveying equipment, GN always pay high attention to the product quality and consider the long-term benefits for our users. We would also like to introduce GN as a professional manufacturer in decanter centrifuge field, GN pays a lot of attention in the selection of raw materials, high-quality centrifugal casting or forging stainless steel materials are used, and for wearing parts, hard alloy protection is used.

By the way, if you are interested in our products, please check the following items of our company on Alibaba:

Decanter centrifuge

3–Phase Disc centrifuge

Sludge dewatering Screw press

Sludge Screw Press and Chemical Dosing Unit Ready for Shipment to American Client

News from GN company this week: Recently, a complete set of Sludge dewatering Screw press and Chemical Dosing Unit have been manufactured and are ready to start serving for an American Client.

To make sure this set of Sludge dewatering Screw press and Chemical Dosing Unit will provide a reliable performance and the parts and components of all the equipment will run smoothly for a long term operation, our technical department, production department and quality control department have paid a lot of attention to the material selection, material preparation, every step of production and the inspection for this set of equipment in each step.

GN Solids Control is one of the most famous International Brand for Mud Solids Control System & Drilling Waste Management. GN have the one stop for Solids Control Solution for mud recycling projects.

If you need any support about the operation and maintenance of GN’s equipment like Sludge dewatering Screw press and Chemical Dosing Unit, please feel free to contact GN company for our engineers’ best experience and knowledge in the relevant industry. We will do our best to assist your project because just in this way we can establish a stable and long term cooperation. And we can provide on-line support and site instruction for specific situation if needed.

By the way, if you are interested in our products, please check the following items of our company on Alibaba:

Decanter centrifuge

3–Phase Disc centrifuge

Sludge dewatering Screw press

Introduction of the Screw Conveyor inside Decanter Centrifuge

The screw conveyor is a main component of decanter centrifuge, its structure, materials and parameters are directly related to the separation effect, production capacity and service life of the decanter centrifuge. The screw conveyor is mainly composed of a spiral blade, a spiral cylinder and a feed chamber.

①Spiral blade: The spiral blade of the recovery device is a continuous integral spiral blade, the spiral winding direction is right-handed, the blade is perpendicular to the generatrix of the drum, and arranged at equal pitch. Since the spiral blade directly contacts the solid-phase sediment, the solid-phase sediment and the blade move relatively. The blades will wear out in daily use, and the ability to transport sediment after the wear is reduced, so that the moisture content of the sediment increases. In daily inspection work, attention should be paid to the inspection of spiral blades. Maintenance personnel sometimes only pay attention to the inspection of rotating parts and ignore spiral blades. If the spiral of the centrifuge has open welding, cracks or severe wear, it should be repaired in time. The repaired welding place on the screw pushing surface should be polished and smooth, and the spiral should be corrected. The stress relief heat treatment is more difficult to operate, so it is more important to focus on strengthening the protection of the spiral during daily use.

②Spiral cylinder body: The spiral cylinder body is also a cone-pillar combination type. The inner cavity of the cylinder is the feed cavity, and there are four feed distribution holes in the feed cavity.

③Feeding position: In production, the closer the feeding point is to the liquid phase outlet, the smaller the particles have no chance to deposit and will be discharged together with the centrifugal liquid. The manufacturer takes this into consideration when producing the centrifuge. The precision of the feeding point set at the small end of the spiral is set at the middle and rear of the spiral cylinder, which is equivalent to extending the drying zone and solid phase material. The time for centrifugal separation of the liquid is correspondingly extended to ensure the dryness of the solid phase discharge.

By the way, if you are interested in our products, please check the following items of our company on Alibaba:

Decanter centrifuge

3–Phase Disc centrifuge

Sludge dewatering Screw press

Vertical Cuttings Dryer and Solids Control Centrifuge for Overseas client

News from GN company this week: Recently, a series of Solids Control equipment have been manufactured and are ready to start serving for an International Drilling Fluids Service Company, the system includes the following modules：

1. Decanter centrifuge GNLW363CG: 4 units

2. Cuttings Dryer GNCD930G: 1 unit

3. Screw Conveyor 6 units

4. Screw Pump: 4 units

GN Solids Control is one of the most famous International Brand for Mud Solids Control System & Drilling Waste Management. GN have the one stop for Solids Control Solution for mud recycling projects.

To make sure these equipment will provide a reliable performance and the parts and components of all the equipment will run smoothly for a long term operation, our technical department, production department and quality control department have paid a lot of attention to the material selection, material preparation, every step of production and the inspection for this set of equipment in each step.

If you need any support about the operation and maintenance of GN’s equipment like Decanter centrifuge, Screw Conveyor, Screw Pump and Cuttings Dryer, please feel free to contact GN company for our engineers’ best experience and knowledge in the relevant industry. We will do our best to assist your project because just in this way we can establish a stable and long term cooperation. And we can provide on-line support and site instruction for specific situation if needed.

By the way, if you are interested in our products, please check the following items of our company on Alibaba:

Decanter centrifuge

3–Phase Disc centrifuge

Sludge dewatering Screw press

Analysis of decanter centrifuge from the material nature

There are many types of Decanter centrifuge, and each type has different characteristics and scope of application. Therefore, it is a very important issue to properly select the appropriate decanter centrifuge according to certain process requirements and technical conditions. The selection of decanter centrifuge is mainly considered from two aspects. The first is the nature, composition of the separated materials, and the second is the technological requirements and economic rationality of the separation process:

I. Consider from the nature and composition of materials

The primary basis for selection is the type of heterogeneous system that is separated. For example, for the separation of emulsions in a liquid-liquid system, the first consideration is to use a Decanter centrifuge. For liquid-solid systems, when the liquid phase of the suspension is a loose material with a low degree of solidity, large solid phase concentration, and coarse particle size (> 100um), various filter decanter centrifuges can be considered. Generally speaking, this kind of decanter centrifuge can get drier filter residue and better washing conditions. Secondly, it is necessary to further select the appropriate form for specific conditions.

If the suspension is a material with a large liquid phase viscosity and a fine solid particle size, it is easy to block the filter cloth or screen, but it is difficult to regenerate. Therefore, a centrifugal sedimentation decanter centrifuge should be used. When the solid phase concentration is large (5% to 10%), a spiral discharge sedimentation decanter centrifuge can be used. If the solid phase concentration is less than 1%, a tubular high-speed decanter centrifuge or a chamber decanter centrifuge can be used. If the solid phase concentration is 1% — 5%, a disc decanter centrifuge can be used. The automatic slag-discharging dish decanter centrifuge can obtain flowing concentrated sediment, so it is often used for solid-phase concentration. For liquid-liquid-solid three-phase systems, generally the solid content is not high, you can use a dish decanter centrifuge.
Second, from the technical requirements of the separation process
The process requirements of the separation process directly affect the selection of the decanter centrifuge. For example, the separation process requires intermittent or continuous operation. The minimum particle size of the separation, the liquid content of the filter residue, the clarity of the filtrate, the discharge method, whether the solid particles are allowed to be destroyed, and washed Requirements, the length of the operating cycle and whether automatic control is required, the degree of automatic control, etc.

In addition, there are still requirements for sealing, anti-corrosion and explosion-proof. In short, it is necessary to choose a Decanter centrifuge that is inexpensive, applicable (that is, in line with process requirements), simple to manufacture, and easy to maintain. Choose according to the main contradictions that need to be resolved and make economic comparisons. Both technical possibilities and economic rationality must be considered. Of course, according to human operation, there are also manual operation and automatic operation. Users can choose according to their needs.

35000bbl Liquid Mud Plant For International Drilling Fluids Service Company

News from GN company this week: Recently, 1 complete set of 35000bbl Liquid Mud Plant have been manufactured and are ready to start serving for an International Drilling Fluids Service Company, the system includes the following modules：

1. Mud solids control system module: 1 set of drilling fluid vibrating screen GNZS594F, 1 set of medium speed Decanter centrifuge GNLW452D, 1 set of high speed Decanter centrifugeGNLW363C

2. Mixing tank module: 4 mixing sand pumps, 4 mixing hoppers

3. Vertical mud storage tank module: 70 500BBL (80m³) mud tanks.

To make sure this set of dewatering system will provide a reliable performance and the parts and components of all the equipment will run smoothly for a long term operation, our technical department, production department and quality control department have paid a lot of attention to the material selection, material preparation, every step of production and the inspection for this set of equipment in each step.

If you need any support about the operation and maintenance of GN’s equipment like High-G Shaker and Cuttings Dryer, please feel free to contact GN company for our engineers’ best experience and knowledge in the relevant industry. We will do our best to assist your project because just in this way we can establish a stable and long term cooperation. And we can provide on-line support and site instruction for specific situation if needed.

GN Solids Control is one of the most famous International Brand for Mud Solids Control System & Drilling Waste Management. GN have the one stop for Solids Control Solution for mud recycling projects.

By the way, if you are interested in our products, please check the following items of our company on Alibaba:

Decanter centrifuge

3–Phase Disc centrifuge

Sludge dewatering Screw press

Introduction of the Unregulated Mechanical Factors about Decanter Centrifuge

There are a lot of specifications about different parts of a Decanter centrifuge, the specifications can define the capability or function of a decanter centrifuge. This article will introduce soem Unregulated Mechanical Factors about Decanter Centrifuge.

A. Drum diameter and effective length

The larger the diameter of the drum and the longer the effective length, the larger the effective settlement area will become, the larger the processing capacity. And the longer the residence time of the material in the drum. At the same speed, the larger the separation factor, the better the separation effect. However, due to the limitation of the material, the diameter of the drum of the Decanter centrifuge cannot be increased indefinitely, because the maximum allowable speed will decrease as the solidity of the material decreases, and the centrifugal force will correspondingly decrease. Generally, the diameter of the drum is between 200 and 1000 mm, and the aspect ratio is between 3 and 4. The current development of Decanter centrifuge tends to have a large aspect ratio with a high rotation speed. This Decanter centrifuge is more suitable for the treatment of low-concentration sludge, and the degree of mud biscuit is better.

In addition, in the case of the same processing capacity, the centrifuge with a large drum diameter can run at a lower differential speed, because the spiral slag conveying capacity of the large drum diameter is larger. To achieve the same slag conveying capacity, a Decanter centrifuge with a small drum diameter must be achieved by increasing the differential speed.

B. Drum half cone angle

When the sediment settled inside the drum is pushed to the discharge port along the end of the drum cone, it is subjected to the downward flow of the backflow force due to the centrifugal force. The half cone angle of the drum is an important parameter in the centrifuge design. In terms of clarification effect, the cone angle is required to be as large as possible; and in terms of slag conveying and dehydration effects, the cone angle is required to be as small as possible. Since the slag transfer is a necessary condition for the normal operation of the centrifuge, the optimal design must first meet the slag transfer conditions. For materials that are difficult to separate, such as activated sludge, the half cone angle is generally within 6 degrees, in order to reduce the reflux speed of sediment. For ordinary general materials, the half cone angle is within 10 degrees to ensure the smooth transportation of sediment.

C. Pitch

The pitch, which is the distance between two adjacent spiral blades, is an important structural parameter that directly affects the success or failure of slag transport. When the spiral diameter is constant, the larger the pitch and the larger the spiral rise angle, the greater the chance that the material will be blocked between the spiral blades. At the same time, a large pitch will reduce the number of turns of the spiral blades, resulting in uneven material distribution at the cone end of the drum and causing increased machine vibration. Therefore, for difficult-to-separate materials such as activated sludge, it is difficult to convey slag, and the pitch should be smaller. Generally, the diameter is 1/5 to 1/6 of the drum diameter to facilitate transportation. For easy-to-separate materials, the pitch should be larger, generally 1/2 to 1/5 of the diameter of the drum, in order to improve the sediment transportation capacity.

Drilling Rig Solids Control Equipment shippped to Oilfield Service Company

News from GN company this week: Recently, 1 complete set of Drilling Rig Solids Control Equipment have been manufactured and are ready to start serving for a Oilfield Service Company, the system includes 4 sets of vibrating screen GNZS594F, 1 set of mud cleaner GNZJ594F-3S16N, 2 sets of Decanter centrifuge GNLW454ET-VFD.

To make sure this set of Drilling Rig Solids Control Equipment will provide a reliable performance and the parts and components of all the equipment will run smoothly for a long term operation, our technical department, production department and quality control department have paid a lot of attention to the material selection, material preparation, every step of production and the inspection for this set of equipment in each step.

If you need any support about the operation and maintenance of GN’s equipment like vibrating scree, mud cleaner, Decanter centrifuge, please feel free to contact GN company for our engineers’ best experience and knowledge in the relevant industry. We will do our best to assist your project because just in this way we can establish a stable and long term cooperation. And we can provide on-line support and site instruction for specific situation if needed.

GN Solids Control is one of the most famous International Brand for Mud Solids Control System & Drilling Waste Management. GN have the one stop for Solids Control Solution for mud recycling projects.

By the way, if you are interested in our products, please check the following items of our company on Alibaba:

Decanter centrifuge

3–Phase Disc centrifuge

Sludge dewatering Screw press

GNTBM-360 Slurry Separation Plant for Pipe Jacking Engineering Company

News from GN company this week: Recently, a complete set of Slurry Separation Plant have been manufactured and ready to start serving for a Pipe Jacking Engineering Company, the system includes.Processing capacity: 360m3/h, equipment including vibrating screen, desanding cyclone, desilting cyclone, , desanding pump, desilting pump.

GN Solids Control is one of the most famous International Brand for Mud Solids Control System & Drilling Waste Management. GN have the one stop for Solids Control Solution for mud recycling projects.

To make sure this set of Slurry Separation Plant will provide a reliable performance and the parts and components of all the equipment will run smoothly for a long term operation, our technical department, production department and quality control department have paid a lot of attention to the material selection, material preparation, every step of production and the inspection for this set of equipment in each step.

If you need any support about the operation and maintenance of GN’s equipment like vibrating screen, desanding cyclone, desilting cyclone, , desanding pump, desilting pump, please feel free to contact GN company for our engineers’ best experience and knowledge in the relevant industry. We will do our best to assist your project because just in this way we can establish a stable and long term cooperation. And we can provide on-line support and site instruction for specific situation if needed.

By the way, if you are interested in our products, please check the following items of our company on Alibaba:

Decanter centrifuge

3–Phase Disc centrifuge

Sludge dewatering Screw press

Instructions about The Use of Flocculant for Decanter Centrifuge

Sewage and sludge are often processed by Decanter centrifuge. During the process, flocculants may be added to improve the treatment effect of sewage and sludge. Which one should be used and what are the principles of dosage, generally. It can be analyzed from the aspects of sludge properties and pH value.

First, the properties of sewage and sludge. The difference in its properties directly affects the sludge dehydration effect: Generally speaking, the more difficult the sludge is to dehydrate by Decanter centrifuge, the larger the amount of flocculant used. The smaller the sludge particles, the greater the amount of flocculant. The higher the organic content and alkalinity in the sludge, the greater the amount of flocculant used. Cationic organic polymers are more effective in treating sludge with high organic content. Cationic organic polymers with high organic content are preferred. For sludge mainly composed of inorganic materials, anionic organic polymer flocculants can be considered. In addition, the solid content of the sludge also affects the dosage. Generally, the higher the solid content of sludge, the greater the amount of use.

Second, the pH value of sewage, sludge. The pH of the sludge determines the form of the hydrolysate of the inorganic salts to be processed by Decanter centrifuge,. The same flocculant is used for sludge with different pH values, and the conditioning effect is also very different. The hydrolysis reaction of aluminum salt is greatly affected by the pH value, and the optimal pH value of the agglomeration reaction is 5-7. High iron salts are less affected by pH, and the optimal pH range is 6-11. In the sludge with a pH value of 8-10, the ferrous salt with higher solubility can be oxidized to Fe (0H), floc with lower solubility. Therefore, when selecting an inorganic salt, the specific pH value of the dewatered sludge must be considered first. If the pH value deviates from the optimal range of its condensation reaction, it is best to use another one. Otherwise, it is necessary to consider adding the acid or alkali to adjust the pH of the sludge before using the decanter centrifuge to treat the sludge.