Decanter Centrifuge is a horizontal spiral unloading, continuous operation sedimentation equipment. The working principle of this type of centrifuge is: the drum and the spiral rotate at high speed in the same direction with a certain differential speed. The material is continuously introduced into the inner cylinder of the feeding spiral from the feeding pipe, and enters the drum after acceleration. Under the action of the centrifugal field, the heavier solid phase is deposited on the drum wall to form a sediment layer. The feeding spiral continuously pushes the deposited solid phase to the cone end of the drum and discharges it out of the machine through the slag discharge port. The lighter liquid phase forms an inner liquid ring, which continuously overflows the drum from the overflow port at the large end of the drum and is discharged out of the machine through the liquid discharge port. This machine can continuously feed, separate, wash and unload at full speed. It has the characteristics of compact structure, continuous operation, stable operation, strong adaptability, large production capacity and convenient maintenance. It is suitable for separating suspensions containing solid phases with a particle size greater than 0.005mm and a concentration range of 2-40%. It is widely used in chemical, light industry, pharmaceutical, food, environmental protection and other industries.
Choosing a suitable decanter centrifuge can not only solve production problems and improve work efficiency, but also save production costs and reduce business risks. The main factors affecting the selection are as follows:
1. Centrifuge speed: Generally, the decanter centrifuge should be above 3000 rpm. The higher the speed, the higher the separation factor of the centrifuge, and the better the separation effect.
2. Centrifuge material: Different materials have different physical and chemical indicators such as wear resistance and corrosion resistance. Foreign decanters are generally made of 316L or duplex stainless steel, and abrasive elements must be made of ceramic synthetic materials.
3. Centrifuge differential control: Different differentials have different control accuracy, and the life and maintenance costs vary greatly. The higher the differential accuracy, the better the adaptability to the material, so it is advisable to use equipment with high differential accuracy.
4. Aspect ratio: The larger the aspect ratio of the decanter centrifuge, the greater its processing capacity and the lower the moisture content.
5. Control system: Whether it is automatic programming control. At present, domestic and foreign equipment manufacturers have basically achieved full automatic control of the equipment.
6. Installed power: affects the control of energy consumption. Generally, domestic equipment has a high energy consumption ratio, while foreign equipment has a low energy consumption ratio.
7. Processing and manufacturing technology: Horizontal screw centrifuges are separation equipment that require high-precision processing. Products produced by companies that do not have fine processing capabilities have a high maintenance rate and limited processing capacity.
How to use a centrifuge
A centrifuge is a machine that uses centrifugal force to separate liquids from solid particles or components in a mixture of liquids and liquids. A centrifuge is mainly used to separate solid particles from liquids in a suspension, or to separate two immiscible liquids of different densities in an emulsion (e.g., separating cream from milk); it can also be used to remove liquids from wet solids, such as using a washing machine to spin dry wet clothes; special ultra-fast tubular separators can also separate gas mixtures of different densities; some sedimentation centrifuges can also classify solid particles by density or size, using the characteristics of different sedimentation speeds of solid particles of different densities or particle sizes in liquids.
How to use a centrifuge:
1. The centrifuge should be placed on a level and solid floor or platform, and try to keep the machine in a horizontal position to avoid vibration during centrifugation.
2. Turn on the power switch, install the required rotor as required, place the sample pre-balanced with a tray balance on the rotor sample rack (the centrifuge cylinder must be balanced at the same time as the sample), and close the cover.
3. Press the function selection key to set various requirements: temperature, speed, time, acceleration and deceleration. For machines with computer control, you also need to press the storage key to memorize the input information.
4. Press the start key, the centrifuge will execute the above parameters and automatically shut down at the preset time.
5. After the centrifuge stops rotating completely, open the cover, take out the centrifuged sample, wipe the rotor and the inner wall of the machine cavity with a soft and clean cloth, and cover the machine after the temperature in the centrifuge cavity is balanced with the room temperature.
Centrifuge precautions:
1. The machine body should always be in a horizontal position, the voltage of the external power supply system should match, and a good grounding wire is required.
2. Before starting the machine, check whether the rotor is installed firmly and whether there is any foreign matter in the machine cavity.
3. The sample should be balanced in advance. When using a centrifuge cylinder for centrifugation, the centrifuge cylinder and the sample should be balanced at the same time.
4. When centrifuging volatile or corrosive liquids, use a centrifuge tube with a cover and ensure that the liquid does not leak to avoid corrosion of the machine cavity or accidents.
5. When wiping the centrifuge cavity, move gently to avoid damaging the temperature sensor in the cavity.
6. After each operation, the use should be recorded and the performance of the machine should be regularly inspected.
7. If any abnormal phenomenon is found during the centrifugation process, the power should be turned off immediately and reported to the relevant technicians for inspection.
Introduction to precautions during the use of centrifuges
Centrifuges are machines that use centrifugal force to separate components in liquids and solid particles or liquid-liquid mixtures. Centrifuges are mainly used to separate solid particles from liquids in suspensions, or to separate two immiscible liquids of different densities in emulsions (such as separating cream from milk); they can also be used to remove liquids from wet solids, such as using a washing machine to spin dry wet clothes; special ultra-fast tubular separators can also separate gas mixtures of different densities; using the characteristics of different sedimentation speeds of solid particles of different densities or particle sizes in liquids, some sedimentation centrifuges can also classify solid particles by density or particle size.
