초록 ▼

Device for oil separation and removal from a working fluid of an organic Rankine cycle plant, said plant having at least a supply pump (6), at least a heat exchanger (1,16), an expansion turbine (5), a condenser (4), wherein the device is provided with a separator (2) and collection means (3), locat

Device for oil separation and removal from a working fluid of an organic Rankine cycle plant, said plant having at least a supply pump (6), at least a heat exchanger (1,16), an expansion turbine (5), a condenser (4), wherein the device is provided with a separator (2) and collection means (3), located between the evaporator (1) and the condenser (4) or between the evaporator (1) and a regenerator (16) of the organic Rankine cycle plant.

대표청구항 ▼

1. A system for oil separation and removal from a working fluid of an Organic Rankine Cycle plant, said system comprising an Organic Rankine Cycle plant and a device; wherein said plant comprising at least a supply pump (6), at least a heat exchanger (1,16), an expansion turbine (5), a condenser (4)

1. A system for oil separation and removal from a working fluid of an Organic Rankine Cycle plant, said system comprising an Organic Rankine Cycle plant and a device; wherein said plant comprising at least a supply pump (6), at least a heat exchanger (1,16), an expansion turbine (5), a condenser (4), and wherein said device comprises: a separator (2), and collection means (3), configured to be located between the evaporator (1) and a condenser (4) inlet or a regenerator (16) of the Organic Rankine Cycle plant,a bypass line (7) configured to fluid connect the evaporator (1) and the condenser (4) inlet,said separator (2) being located along the bypass line (7) that further includes a first valve (8) upstream of the separator (2) and a second valve (9) downstream of the separator (2) for isolating the bypass line (7) from the Organic Rankine Cycle plant, the device further comprises a third valve (10) which is located upstream of the collection means (3) for injecting air or nitrogen under pressure, coming from a tank (11), when it is necessary to perform the discharge of the collection means (3); and wherein said separator (2) comprises a cyclone (19) which, in turn, comprises a coalescent filter (20) located in a terminal part of said cyclone (19). 2. The system according to claim 1, wherein said bypass line (7) is configured so as to connect a portion (1′) of the evaporator (1) in which is present the vapor phase of the working fluid and the condenser (4). 3. The system according to claim 1 wherein said first valve (8) is configured to continuously control a bypass flowrate in a range between 1/10000 and 1/1000 of the total plant flowrate. 4. The system according to claim 1 wherein said second valve (9) is configured to adjust the pressure on the bypass line. 5. The system according to claim 1 wherein a calibrated hole disc is configured to determine a bypass flowrate. 6. The system according to claim 1 wherein a capillary tube is configured to determine a bypass flowrate. 7. The system according to claim 1 further comprising a fourth valve (15) which is located between the separator (2) and the collection means (3), said fourth valve (15) being configured to isolate said collection means (3) so that the separator continues working while making the discharge of the collection means (3). 8. The system according to claim 1, wherein said device is assembled on a head of the evaporator (1) by fastening means. 9. The system according to claim 1 wherein said collection means (3) is configured to be welded on a evaporator (1) head, so as to allow an easy control of the collecting working fluid temperature. 10. The system according to claim 1 wherein said collection means (3) is a separate device that is autonomously heated. 11. The system according to claim 1, wherein said separator (2) is configured for fractional distillation and receive a mixture of oil and working fluid from a portion (1″) of the evaporator in which is present a liquid phase of the working fluid. 12. A method for oil separation and removal from a working fluid of an Organic Rankine Cycle plant by means of the system according to claim 1, wherein said method is comprising the following steps: oil and working fluid inlet in the separator (2);oil separating from the working fluid in the separator (2),oil conveying inside the collection means (3);collection means (3) discharging,wherein said discharge phase of the collection means (3) takes place by opening the valve (10) for injecting air or nitrogen under pressure, which pushes the oil towards the drainage (14) of the collection means (3). 13. The method according to claim 12 where said step of oil separating from the working fluid in a vapor phase in the separator (2) is performed by means of a centrifugal or inertial effect. 14. The method according to claim 12 further comprising, at the end of the separating phase, a coalescence phase of the oil droplets by means of a coalescing filter (20) at a separator (2) outlet. 15. The method according to claim 12 where said step of oil separating from the working fluid in a liquid phase in the separator (2), is performed by means of a fractional distillation. 16. The method according to claim 12, wherein said discharging phase of the collection means (3) is performed isolating the bypass line (7) by closing the first valve and the second valve (8,9) and opening a valve (13) located on the drainage (14) of the collection means (3).