武汉理工大学：《船舶辅机》课程教学资源（PPT课件，英文版）6.7 DVZ-oily water separator

6.7 DVZ-oily water separator Significant features DVZ-JET WASH oIl drainage Self-cleaning with sea water using a reversible pump Automatic electrode cleaning DBGM8404946 Utilization of the adhesion tendency of oil to aid separation Diversion of the coalesced dispersion into the pre-separation chamber and not back to the bilge

6.7 DVZ-oily water separator • Significant features: • DVZ - JET WASH oil drainage • Self-cleaning with sea water using a reversible pump • Automatic electrode cleaning DBGM 8404946 • Utilization of the adhesion tendency of oil to aid separation • Diversion of the coalesced dispersion into the pre-separation chamber and not back to the bilge

6.7 DVZ-oily water separator

6.7 DVZ-oily water separator

6.7 DVZ-oily water separator The dVz-VC-"OILMASTER"is a combinated gravity coalescence oil separator. To avoid unnecessary mechanical emulsions the oil separation pump draws mixture from the bilge or bilge water tanks through the oil separator. The oil-water mixture enters the oil separator dome from above This had the advantage that free components of oil are deposited with water and form a buffer. The oil-water mixture subsequently entering flows through this buffer, which thus constitutes the primary separation Stage because, as is well-known, more and more particles bind with one another due to the adhesion properties of the oil. even suspended matter which is heavier than water finds it difficult to penetrate this oil buffer. The preseparated mixture then flows down to the bottom of the oil separator

6.7 DVZ-oily water separator • The DVZ-VC-"OILMASTER" is a combinated gravity coalescence oil separator. To avoid unnecessary mechanical emulsions the oil separation pump draws mixture from the bilge or bilge water tanks through the oil separator. The oil-water mixture enters the oil separator dome from above. • This had the advantage that free components of oil are deposited with water and form a buffer. The oil-water mixture subsequently entering flows through this buffer, which thus constitutes the primary separation Stage because, as is well-known, more and more particles bind with one another due to the adhesion properties of the oil. Even suspended matter which is heavier than water finds it difficult to penetrate this oil buffer. The preseparated mixture then flows down to the bottom of the oil separator

compr. air supply 5-6 bar N1 A3.1 A1.1P1.1 A3 A5.1 SLUDGE K TANI A2 B BILGE HOLDING TANK SEA CHEST A1今 from bilge A3→ to dirty oil tank A5→ overbore discharge A2 from sea A4 retum to bilge

6.7 DVZ-oily water separator Suction pipe from bilge/bilge tank al The suction height incl losses due to friction in the pipes should not exceed 6 mtr. a non return valve must be fitted at the suction point in the bilge/bilge tank. A coarse filter with appr. 2mm perforations should be fitted close before entering into separator When the system is put into operation for the first time facilities should be provided for topping up the suction pipe. The pipe connections must be absolutely vacuum tight. When using heavy fuel oil with high viscosity the bilge tank should be heated

6.7 DVZ-oily water separator • Suction pipe from bilge/bilge tank Al The suction height incl. losses due to friction in the pipes should not exceed 6 mtr. A non return valve must be fitted at the suction point in the bilge/bilge tank. A coarse filter with appr. 2mm perforations should be fitted close before entering into separator. • When the system is put into operation for the first time, facilities should be provided for topping up the suction pipe. The pipe connections must be absolutely vacuum tight. When using heavy fuel oil with high viscosity, the bilge tank should be heated