The spiral sedimentation centrifuge has reasonable structure, advanced technology and fine manufacture. It can concentrate, dehydrate or separate solid particles in the range of several microns to three millimeters.
Product characteristics :

1, Good adaptability: in the process of fully considering the material, the process of various special requirements for centrifuges, the primary components of the implementation of special, adjustable optimization design. As long as the user before the purchase of the installation and use of the place, material processing physical and chemical characteristics, process requirements and so on, we will provide users with the most suitable model. High degree of

• Automation: centrifuge in the work of feeding, separation, unloading, and other processes are carried out in high speed continuous automatic operation. The automatic control of centrifugal separation and centrifugal scour process is completed by programmable controller.
• Stability The differential used in centrifuge is cycloid wheel differential or planetary wheel differential, which has the characteristics of large torque and wide conditioning range.
• Performance is strong: the centrifuge adopts the double motor double frequency conversion energy reaction differential speed system to control, carries on the flexible stepless conditioning to the differential speed, and adjusts the differential speed at any time according to the material change. real energy saving products. Good
• Operation environment: centrifuge separation of materials is carried out under completely closed conditions, to ensure that the operation site is neat, and to maintain the production environment neat and hygienic, to complete civilized production.
• Safety maintenance device is completely reliable: centrifuge with torque maintenance, power control and other multiple maintenance can effectively eliminate or reduce the damage caused by sudden failure to the machine. Beautiful 7. Shape: the machine seat is welded by carbon steel, the appearance is treated by special technology, lubrication is smooth.

The horizontal screw centrifuge is a equipment for separating suspension by centrifugal sedimentation principle. Its working principle is that when the separated suspension enters the drum of the centrifuge, the solid particles with higher density than the liquid phase quickly settle to the inner wall of the drum under the centrifugal force of the drum. The separated liquid flows out from the overflow Weir of the drum. This horizontal screw centrifuge can feed, separate, wash and unload continuously at full speed. Compact structure, continuous operation, smooth operation, strong adaptability, production Large capacity, convenient maintenance and other characteristics. suitable for separating suspensions with solid-containing particle size greater than 0.005 mm, concentration range of 2-40%. Widely used in chemical, light industry, pharmaceutical, food, environmental protection and other industries.

Screw conveyor is through rotating blade, push the material, widely used in building materials, chemical, electric power, metallurgy, coal mine, grain and other industries. Screw conveyor is suitable for horizontal or inclined conveying powder, granular and small block materials, the temperature of general materials should be less than 200℃, it is not suitable for conveying materials that are prone to deterioration, easy to caking or sticky. Today, we introduce the advantages and disadvantages of screw conveyor, which is convenient for customers to understand and use.

 I. Advantages of screw conveyors

 (1) Spiral shaft and shaft are connected by embedded tongue type, which makes installation, disassembly and maintenance very convenient and has less failure rate.

 (2) The screw conveyor adopts variable diameter structure, and the lifting bearing can not contact with the material, so its life is long.

 (3) It is not easy to jam or block the material when conveying, and the head and tail bearing seat is outside the shell, the seal of the bearing is good can be used for a long time.

(4) The structure is simple and the size is small, so the occupied area and space are not very large.

(5) There may be multiple feed and discharge ports, which can be arranged flexibly.

 (6) It is delivered in a reversible direction and therefore can be delivered in both directions.

 (7) Safe and reliable operation, can complete transportation, mixing, stirring, loose, heating and cooling processes.

 II. Disadvantages of screw conveyors

 (1) The friction between the blade, the casing and the material is relatively large, which makes the blade and the casing easy to wear, and the power consumption is also relatively large.

 (2) The transport distance is limited and can not exceed the maximum requirement.

 III. Selection of screw conveyor diameters

 For the screw diameter of the winch conveyor, the requirements should be met:

 In the case of conveying bulk material, the screw diameter shall be 10 times the maximum side length of the particle;

 If there are only a small number of large particles, the spiral diameter should be 4 times the maximum side length of the particle.

GN can customize screw conveyors upon customers’ request. No matter O-type or U-type, GN is able to fabricate quality products specially for clients’ needs and requirements. We have standard products for multiple usage. Please contact us if you are interested in this product.

How much is the maximum tilt angle of the screw conveyor, depending on what specifications the screw conveyor is, the screw conveyor is divided (tube type, U type, no shaft, have shaft), and then what material is transported is related to this screw conveyor angle problem.

When the screw conveyor is used to transport the material horizontally, the material is pushed by the screw blade. When the internal friction force between the material layers is greater than the external friction force between the material and the groove wall, the material flow is stable when the ratio of the height of the material layer to the width of the machine slot is satisfied. The the material is transported vertically, it depends on the property of the material. The material in the machine slot is pushed by the spiral piece in the direction of movement. The lower part is continuously fed to prevent the upper material from sliding, resulting in lateral side pressure, thus increasing the internal friction of the material. on transportation to form a continuous material flow. Because the spiral vibrates in the movement, the material arch will be destroyed and formed sometimes, which makes the material lag for the spiral gap in the transportation process, which affects the conveying capacity.

What is the maximum tilt angle of the screw conveyor? For the same material, there are shaft, no shaft, tube, U type, etc., the same speed ratio of screw conveyor is the same type, their conveyor quantity is different, not to mention if there is tilt angle, the conveying quantity is more different, because screw conveyor has tilt angle, material has backflow phenomenon, so the conveyor quantity is different.
For the same type of speed ratio screw conveyor, under the condition of conveying the same material and angle, the axial tube type screw conveyor is larger, and the U type screw conveyor without shaft is smaller. the maximum tilt angle of shaft tube screw conveyor is 45°, and the maximum tilt angle of shaft tube screw conveyor is 30°. The maximum tilt angle of U screw conveyor with and without shaft is °20-30.

Remark: The greater the angle of the screw conveyor, the same speed ratio and model screw conveyor, the transport volume will be weakened. Screw conveyor is often used for dust removal equipment.

Centrifuge is a machine that uses centrifugal force to separate the components of a liquid from a solid particle or a mixture of liquid and liquid. Mainly used in chemical, petroleum, food, pharmaceutical and other industries. There are many kinds of centrifuges, let’s talk about the operation process and advantages of industrial centrifuges.

The characteristic of industrial centrifuge is that it can automatically carry on the cycle operation of feeding, separating, washing, drying, discharging, washing net and so on. The operating time of each process can be automatically controlled by the electrical hydraulic system according to the procedure according to the predetermined requirements, or it can be operated directly by manual.

When the industrial centrifuge is operated, the feed valve opens automatically, the suspension enters the drum running at full speed, the liquid phase is thrown out of the drum through the filter net and the small hole in the drum wall, and then flows out through the outlet of the casing. The slag left in the drum is evenly distributed on the filter surface by rake teeth. When the filter slag reaches the specified thickness, the feed valve automatically closes. Then the flushing valve is opened automatically, and the washing liquid is sprayed on the filter slag for a certain time, and the valve is automatically closed. After drying for a certain time, the scraper rises automatically, the filter slag is scraped and discharged through the inclined chute. When the scraper rises to the limit position, it automatically recedes, and the flushing valve is opened to flush the filter. For a certain duration After time, complete an operation cycle. re-start feed into the next operation cycle.

Industrial centrifuges have the advantages of strong adaptability to materials, the particle size of solid particles can be used from very fine to very coarse; the concentration of suspension and the change of feed is not sensitive; filter, washing time can be freely adjusted; filter slag dry, and can get very good washing; generally at full speed to complete each process, production capacity; can filter or settle some difficult to separate suspensions.

GN produces quality centrifuges that can be applied in many industries and fields, such as mining, chemical, petroleum, food and beverage, edible oil, pharmaceutical etc. Please contact us for more information.

1. Working Principle of Vertical Vibration Discharge Centrifuge

In general, the vertical and horizontal centrifuge structure is not different, the difference is mainly arranged in different ways, vertical is vertical. The working principle of vertical centrifuge is that the staff put the material into the machine through the funnel, pay attention to the distribution must be evenly when placed. When the machine is running, the material can be thrown into the cone of the sieve basket by centrifugal force at high speed. Among them, because its vibration is axial, its material also moves from top to bottom with the whole sieve surface, and then realizes the separation of solid and liquid. The separated liquid can be discharged through the sink. In addition, the vibration of the machine can keep the material loose  state, so that the overall dehydration effect is more obvious.

2. Working principle of Horizontal vibrating discharge centrifuge

In horizontal high-speed vibration dynamic discharge axial centrifuge, the material is mainly subjected to two axial centrifugal forces. One main force is the axial centrifugal force which rotates at high speed along the rotating direction of the inertia diameter of the vibrating animal material; the other is the centrifugal force which comes from the direction of the inertia axis of the vibrating material along the rotation direction of the material diameter. because the internal \915; centrifugal gravity of the material and the factor of its separation rate are usually much smaller compared with the centrifugal force factor of the material axis upward, the axial centrifugal force factor is negligible.

The direction and numerical value of the two vibrating inertial friction forces on the internal movement of the various materials to be processed can always change. The centrifugal force can C be divided into two forces, that is, Cp and Ct,. The inertial force of vibration can also be decomposed into JP and Jt.. If the result is greater than the friction between the input material and the sieve surface, the material will move outward, that is, the discharge.

3. Working principle of scraper discharge centrifuge

In general, scraper discharge centrifugal opportunities according to the distribution of sieve basket in which the distinction is horizontal and vertical. The operation principle of the machine is mainly through centrifugal force to achieve filtration, when the wet coal enters, it will reach between the sieve basket and the scraper of the screw, and then through centrifugal force, the centrifugal liquid is discharged through the whole material from the screen and into the sink, and finally out of the machine, the material that drains the water will remain inside the screen. But there is a certain speed difference between the sieve basket and the screw scraper, which makes the scraper can scrape out the coal particles and finally get the dry coal.

The spiral corner spacing on the scraper shaft refers to the angle between the trajectory of the centrifuge coal flow motion and the centrifuge sieve strip. at present, assuming that the measured value β=45~60°, the effective width of the sieve seam is determined to be Bβ=b/sinβ(where, b/snβ is the scraper pitch of the centrifuge). It can be seen that the correct selection of appropriate scraper pitch is very important for the dehydration of centrifuges [2]. moreover, the gap between the scraper and the sieve basket is required to be (2±1) mm, this gap can be adjusted by increasing or decreasing the mat on the flange of the shaft or decrease the scraper.

Decanter centrifuge is a continuous operation of settling equipment. Choosing a suitable decanter centrifuge can not only solve the production problem and improve the working efficiency, but also save the production cost and reduce the operating risk. The following is to introduce the main points of maintenance and maintenance of decanter centrifuge.

1. for bag type coarse effect or medium effect filter, under normal use condition, general use 7-9 weeks should replace new.

2. for sub-efficient filters, under normal operating conditions, the general use of 5-6 months, should also be replaced.

3. all kinds of filters before the device, do not promise to open the bag or packaging film; and according to the packing box marked on the biased storage filter; in the handling process, should be light, light release, to prevent violent vibration and collision.

4. for high-efficiency filters, the device bias must be accurate: when using corrugated plate combination filter in vertical device, corrugated plate must be perpendicular to the ground; filter in vertical and frame connection, strictly prohibited leakage, deformation, breakage and leakage of glue, etc., after the device must be wrapped inside clean, free of dust, oil, rust and debris.

5. the high efficiency filter is installed, the arrow on the outer frame should be consistent with the airflow direction; when it is installed vertically, the filter paper crease direction should be perpendicular to the ground.

6. transport and storage of efficient filters shall be shelved in accordance with the direction of the factory signs. Lying screw centrifuge in the transport process, should be light to take light release, to prevent violent vibration and collision, do not allow rough loading and unloading.

7. the high efficiency filter must be unpacked at the installation site before installation for appearance inspection, including: filter paper, sealant and frame damage; side length, diagonal and thickness dimensions meet the requirements; frame with or without burrs and rust spots; with or without product certification, technical performance meets the design requirements. Then according to the standard “clean room construction and acceptance code” the method of inspection, qualified should be installed immediately.

8. the cleanliness level is equal to and higher than the high efficiency filter used in the clean room of class 100, the detected according to the method specified in the clean room construction and acceptance code before installation, and the required requirements shall be met.

To be continued

The screw conveyor uses the motor to drive the screw to rotate, moving the material to achieve horizontal, inclined or vertical transport, in the material movement direction of the end of the thrust bearing with the material to screw axial reaction, in the long time, the middle hanging bearing should be added.

Structure of the Screw Conveyor:

Screw conveyor in the form of conveying is divided into shaft screw conveyor and shaftless screw conveyor. Axial screw conveyor is composed of screw, U type material slot, cover plate, inlet, outlet and drive device. Axialless screw conveyor is changed to shaftless screw, and in U groove device has replaceable lining body, material is input by feed port and output by outlet after screw push, the whole transmission process can be carried out in a sealed slot.

Spiral blade welded on rotating shaft of screw conveyor, the surface type of blade according to the different conveying materials have solid surface type, belt surface type, one-sided type of blade.

Working Principle of Screw Conveyor:

When the screw shaft of the conveyor rotates, the material can only move forward along the bottom of the conveyor’s groove under the push of the blade because of the gravity of the material and the friction force generated with the groove wall, as if the nut that can not be rotated forward along the rotating screw. The movement of the material in the middle bearing depends on the thrust of the material moving forward behind it. This process needs continuous material feed into the screw conveyor from the inlet port.

In this regard, the delivery of materials in the screw conveyor, is a type of slip motion. In order to keep the screw shaft in a pull state, the drive device and the discharge port are generally placed at the same end of the conveyor to achieve this target, while the feed inlet port is placed as far as possible near the tail of the other end. The rotating screw blade carries the material through, so that the material does not rotate with the screw conveyor blade is the weight of the material itself and the friction resistance of the screw conveyor housing to the material.

GN produces screw conveyors of different capacities, ranging from 15 ton/h to 55 ton/h. At the same time, we can also produce the machine in a customized way to meet clients requirements.

Centrifuge is a very important instrument used in many fields of industry and chemistry. Its purpose is to achieve the separation of useful or non-material, to ensure that such separation can improve the utilization of substances, and many experiments can be carried out, and all of these benefits, that is, the invention of centrifuges to achieve the results, and people do meet their own application needs.

After finishing the basic introduction of the centrifuge, it is very necessary for us to know the working principle of the centrifuge, to understand, such an instrument is how to achieve separation work, which will help us a lot in using it in the future.

In fact, the working principle of the centrifuge is very simple, it is through the centrifuge inside the rotor through high speed operation, speed up the settlement between liquid and solid later to achieve separation, so this is very simple, but we need to pay attention to the force generated by this rotor, if not strong enough, still can not produce separation effect, so in the design, pay attention to the construction of this part.

Of course, when it comes to this application principle, that is, the natural phenomenon that we will often see in our daily life, and the use of instruments is to transform the natural phenomenon, and through the instrument to complete its separation, so this method is also feasible. It is important to know that the application of centrifuges in human society is indeed huge and vast, so it is useful and good to know such an instrument.

Features：

◎ microcomputer control, AC frequency conversion motor drive, smooth operation, quiet.

 ◎ large liquid crystal display speed, centrifugal rate, temperature and time and other parameters, running can change the parameters at any time, no downtime.

 ◎ can set centrifugal force, RCF value, can be exchanged, can be observed at any time.

 ◎ is provided with a short-time centrifugal special click key.

 ◎10 gear acceleration and deceleration control ,9 gear free stop time can reach 540 s, meet the special separation product use requirements.

displayed in seconds when the ◎ time is less than one minute.

 ◎ adopt electronic door lock, full steel inner cavity protective sleeve.

 ◎ is suitable for the separation and purification of radioimmunoassay, biochemistry, biopharmaceutical and blood products.

If you are interested, please contact us

Mobile : +8615100635311 WhatsApp : +8615100635311

WeChat：+8615100635311 Email: tony@gnseparation.com

Centrifuge is an instrument for separating samples, which is widely used in biomedical, petrochemical, agriculture, food hygiene and other fields. It uses the difference of precipitation speed of different substances in centrifugal force field to realize the analysis and separation of samples. Since the advent of centrifuge, after the low speed, adjustment, overspeed changes, its progress is mainly reflected in centrifugal equipment and centrifugal technology, the two complement each other.

From the view of rotational speed, table centrifuge basically belongs to the category of low speed and high speed centrifuge, so it has the technical characteristics of low speed and high speed centrifuge, and its structure is mainly composed of motor drive system, refrigeration system, mechanical system, turning head and system control.  Part of the composition, compared to the floor centrifuge is only a little smaller size and capacity. The development of universal desktop centrifuge has blurred the boundary of low speed, high speed, micro and large capacity centrifuge large capacity centrifuges.

Maintenance of centrifuges

(1) After each use, be sure to clean the centrifuge cavity and rotor.

(2) Clean up the water in the centrifuge chamber in time. Centrifuge operation using compression mechanism cold, because the air contains moisture, in the centrifuge cavity frost into water. Most large-capacity centrifuges have no drainage holes, and more water is accumulated in the centrifuge cavity. At this time, the rotor should be removed to clean up the water. When reinstalling the rotor, be sure to install it to avoid accidents.

(3) There are rubber sealing rings in the contact between the upper part of the centrifuge chamber and the door cover, and in the contact between the rotor seat and the bottom of the centrifuge chamber, and any deformation should be observed frequently to prevent external heat infiltration, such as deformation or aging should be replaced in time.

(4) Check regularly whether the door cover pneumatic support rod and door lock switch can work properly.

(5) Check regularly whether the cooling fan is working properly; regularly remove dust from the centrifuge ventilation window and condenser to ensure the ventilation effect and the heat transfer effect of the condenser.

(6) Check the oxidation layer on the inside and outside surface of the rotor regularly, if there is peeling, corrosion, serious scratch, deformation or crack, it should be stopped in use. When the centrifuge is not in use for a long time, the rotor should be taken out and coated with antirust oil on the rotor seat and drive shaft to prevent the rotor seat and drive shaft from rusting.

For the cause of centrifuge accident, in order to ensure the safety of centrifuge use, we should strengthen the following aspects of management.

Correct installation of centrifuges

(1) Power supply voltage. The voltage fluctuation should meet the industry standard within 10%, otherwise the centrifuge can not run normally. If the voltage fluctuation exceeds the industry standard, the voltage regulator should be used to meet the normal working needs of the instrument.

(2) Protection of grounding. The indoor should have independent ground wire, the ground wire should be reliably connected with the centrifuge shell, the ground resistance <4Ω, the ground wire can not be connected to the heating pipe, the water pipe, so as to avoid the occurrence of electric shock accident.

(3) Centrifuge placement. A suitable location should be selected according to the performance of the centrifuge, and the general low speed centrifuge (table) can be placed on a smooth, solid table (its base is equipped with rubber suction feet, with the help of atmospheric pressure and the weight of the instrument itself, close to the table); large capacity low speed centrifuge and high speed centrifuge should be placed on the corresponding solid ground, horizontal placement. Centrifuge weighing hundreds of kilograms, should be placed on a very solid ground, and equipped with dustproof, moisture-proof equipment. There is no strong vibration source near the centrifuge, avoid heat source and direct sunlight around, leave some space around, keep good ventilation.

(4) Host installation. Adjust the screw to support the machine foot to the ground, observe and adjust the screw through the level to make the main engine stable. Install the rotor, position the fastening, place the leveler in multiple parts of the rotor, adjust the screw until the leveler bubbles are all located in the center. Ensure that the 4 feet are balanced and the suspension is not allowed.