Biodiesel Disk Stack Centrifuge

Biodiesel, a kind of renewable fuel resource, is widely available. Now, a new trend of utilizing biodiesel resources is being raised. Compared with mineral diesel oil, it has such features as low sulfur content, low pollution emission, good renewability and excellent biological degradability etc.   Therefore, it has wide development prospect. Biodiesel is obtained by means of the socalled transesterification process. This is a chemical reaction, which replaces one type of alcohol in a given ester with another using methanol. As a result of this transesterification, the end product has a clearly lower viscosity than the untreated oil and can therefore be used as a fuel, with only minor adjustments to the engine.   Biodiesel can be mixed in any ratio with mineral oil diesel. Centrifugal separators can be used in the following process stagesin virtually all of the following:   Separation of methyl ester and glycerine / catalyst / soap / methanol   Washing of methyl ester   Separation of fatty acids from glycerine   Separation of salts from glycerine     Centrifuge machine Standard design       The machine consists of a frame that has a horizontal drive shaft with clutch and brake, worm gear , lubricating oil bath and vertical bowl spindle in the lower part.   The bowl is mounted on top of the spindle in the lower part. The bowl is mounted on top of the spindle , inside the space formed by the upper parts of the frame , the ring solid cover, the collecting cover, and frame hood . The feed and liquid discharge system , including the paring disc pump for the heavy phase, also rests on this structure. All parts in contact with the process liquid are made of stainless steel. The bowl is of the solid-ejecting disc type with hydraulic operating system. The electric motor is of the variable frequency drive type or of controlled-torque type.           Basic equipment   Concentrator or purifier parts, inlet and outlet devices, revolution counter, set of erosion-protective parts ,illuminated sight glass box for light phase outlet , vibration switch , vibration-isolating base plate , flange motor, set of tool and standard set of spare.       Optional extras   Started equipment, frequency converter, discharge control panel, standard set of fittings, set of CIP valves and fittings and serviceability package for online viewing of separator status       Material data   Bowl body , hood and locking ring S.S304   Solids cover and frame hood S.S   Frame bottom parts green cast iron , cald with   In and outlet parts S.S   Gasket and o-ring Nitrile rubber       Operating principles       Separation takes place inside a rotating bowl. The feed is introduced to the rotating centrifuge bowl from the top via a stationary inlet pipe (1),and is accelerated in the distributor(2),which was specially designed to ensure smooth acceleration of the feed liquid(4). Leaving the distributor, the feed enters the disc stack(3). The separation into liquid-liquid-solid takes place between the discs, with the oil phase moving through the disc stack to the centre. When it reaches the centre, it is discharged through hole (5) and ejected into the collecting frame. The water and heavy solid separated from the oil move to the periphery, and the water flows via channels in the top disc(6) to the paring chamber, where it is pumped out of the rotor by means of a built-in paring disc(7).During purification, hot water is fed into the inlet of the bowl before the process liquid is introduced. The water forms a seal around the outer edge of the top disc. The solid collect in the periphery where they are discharged intermittently via the centrifuge cyclone. The solid are discharged by means of a hydraulic system, which forces the sliding bowl bottom(8)to drop down at preset suitable intervals, thus opening the solid ports at the bowl periphery         Centrifuge machine Main Parameter      

Model	Bowl Speed(rpm)	Capacity(Per Hour)	Running Load(Watts)	Dimensions, Overall (mm)
				Width	Front-to-Back	Height
250	8500	500-800	4.0	850	850	1200
270	7300	1000	4.0	950	950	1200
300	7150	1500	5.5	1025	1300	1300
360	7056	2000-3000	7.5	1500	1100	1500
400	7038	3000	7.5	1500	1100	1550
500	6600	5000-8000	15.5	1772	1500	1855
550	6200	8000-15000	18.5	1970	1560	1970
730	4900	50000-80000	55.0	2580	1980	2340