High performance Alfa Laval Decanter Separator for Sewage Treatment

                                                        Decanter Centrifuge for Sewage Treatment   Specification: Application: Decanter for water sludge separation Motor brand: ABB,SIEMENS Bearing: SKF Length-dia-ration: more than 4 Conveyor flight: lining or tiled Discharging Type: Automatic control by PLC system       Product Description Basic principles:
For the Alfa Laval Decanter Centrifuge, the continuous feeding, separating and discharging can be realized as it rotates at its full speed. It is characterized by compact structure, easy obturation, smooth running, low noises, large handling capacity, low energy consumption, high automation, small working strength, simple operation and easy maintenance, and wide applications
The decanter centrifuge is the only sedimentation centrifuge designed from the start to handle significant solid concentration in the feed suspension. At the same time it can achieve quite good degrees of clarification of the liquid concentrate. Although a complicated piece of machinery it embodies a simple principle.  They consist basically of a horizontal cylindrical bowl (1) rotating at a high speed, with a helical extraction screw (2) placed coaxially. The screw perfectly fits the internal contour of the bowl, only allowing clearance between the bowl and the scroll. The differential speed between screw and scroll provides the conveying motion to collect and remove the solids, which accumulate at the bowl wall. Operating principle :
The product to be treated (3) is introduced axially into the unit by appropriate distributor (4). It is propelled into the ring space (5) formed by the internal surface of the bowl and the body of the scroll. The separation process basically takes place inside the cylindrical section of the bowl. The relative velocity of the scroll pushes the settled product (6) along into the bowl. The conveyance of the solids into the length of the cone enables the sediment to pass out of the clarified liquid phase. As the feed is continuous a liquid level (7) is established in the unit following a cylindrical surface that constitute the internal surface of the liquid ring. Once the solids have passed out of the liquid ring the remaining section of the cone all the way up to the ejector provide the final draining: this section is known as the drying zone (8). The clarified liquid (9) is collected at the other end of the bowl by flowing through the adjustable threshold (10), which restrict the liquid ring of the unit. A cover that enables the clarified liquid as well as the sediments to be collected protects the rotor. The decanter operates mainly by sedimentation a process causing the separation of suspended solids by virtue of their higher density than the liquid in which they are suspended. If the density difference is high than gravity may provide sufficient driving force for the separation to occur in a reasonable time. If the density difference is small, or the particle size is very small, than gravity separation would take too long and the separation force must be increased by the imposition of centrifugal forces many times that of gravity alone.
Advantages:
The prime beneficial characteristic of the decanter is its ability to remove separated solids from the separation zone on a fully continuous basis.
By comparison with:
•Gravity sedimentation: the decanter can achieve separations that would be very difficult in a clarifier or lamella separator, and it produces drier solids. •Hydrocyclones: the decanter has a much higher liquid capacity, can handle much higher slurry concentrations, and producer much drier solids. •Tubular bowl centrifuges: the decanter offers higher capacities, the ability to handle concentrate slurries, and continuous operation. •Imperforate basket centrifuges: the decanter operates continuously, can handle much higher solids concentrations, and produces much drier solids. •Disk stack centrifuge: the decanter is truly continuous in operation, can handle much higher solids concentrations in the feed slurry and produces drier solids. The advantages of the decanter are its wide range of potential use, coupled with its continuous operation, its ability to accept a wide range of feed concentrations, and its availability in a wide range of feed capacities. Application:
It is applicable to the separating of the suspension with the diameter of the granule of solid-phase material greater than 0.005 mm and with the concentration ranging from 2% to 40%. It has found wide applications in such trades as chemical, Light industry, Pharmacy, food, environmental protection, etc. In nowadays technology, 2phase decanter centrifuge with disc separator group and 3phrase decanter centrifuge (tricanters) are both widely adopted in the industry, the machine group is for some small working capacity factory lower than 5000L/H, in the contrary, most of the factory with bigger capacity will use 3phase decanter centrifuge for such process, we will have specific chapter to introduce my 3phase decanter centrifuge. After separation by 2phase decanter centrifuge, the fish oil and fish water will be discharge from the liquid outlet, then, if you need to extract the fish water to get its protein, use disc stack centrifugal separator for further treatment, you will get clear oil and fish water separately, the water could be extracted and dried and act as protein power to add into the fishmeal to get higher protein content, it could bring you more economic benefit compared with the lower protein content foodstuff.   Assembly Parts           Finished Products       Packaging & Shipping   Our Services  Be great at the quality and be excellent in the value
To guarantee the quality under the international standard and QC system,to supply distinguished equipment to the clients. 1.We have professional person on line to provide you comprehensive.easy-understanding and detail information and technical data about the machine you interested;solve your confusions or questions about the machine 2.Advise you the most suitable type of machine according to your requirement for your reference 3.Arrange the schedule if you pay a visit to our factory. 4.Send our technical engineer to your country for installation ,operation test ,slove questions and so on if required