KR101283813B1 - Exhaust-gas power-recovery turbine, waste heat recovery system, and method for operating a waste heat recovery system - Google Patents

Abstract

The present invention relates to a method of operating an exhaust gas power recovery turbine 20, a waste heat recovery system 1, and a waste heat recovery system, wherein the exhaust gas power recovery turbine is rotatably mounted to the turbine housing 21, the turbine housing, A rotor 23 having a plurality of turbine blades 23a, and a guide baffle 24 disposed in the turbine housing for controlling the inflow of exhaust gas into the turbine blades, the turbine housing comprising the guide baffle; A plurality of exhaust gas inlet passages 22a, 22b leading through the turbine blades, the individual exhaust gas inlet passages being separated from each other up to the guide baffle, the exhaust gas pressure in each exhaust gas inlet passage Pressure sensors measuring (PI, PII) are arranged in each exhaust gas inlet passage. The present invention makes it possible to realize improved efficiency in waste heat recovery while avoiding vibrations in turbine blades in a multi-engine system.

Description

Operation method of exhaust gas power recovery turbine, waste heat recovery system, and waste heat recovery system {EXHAUST-GAS POWER-RECOVERY TURBINE, WASTE HEAT RECOVERY SYSTEM, AND METHOD FOR OPERATING A WASTE HEAT RECOVERY SYSTEM}

Exhaust-gas power-recovery turbines, waste heat recovery systems having such exhaust gas power recovery turbines, and methods of operating such waste heat recovery systems.

In marine applications, in a multi-engine system, ie a system with a plurality of internal combustion engines, the individual exhaust gas lines of the internal combustion engines are configured separately from each other, and thus in one exhaust gas line. It is ensured that the defect does not affect the operating mode of other internal combustion engines.

For a multi-engine system, a waste heat recovery (WHR) system having a steam turbine utilizing waste heat and an exhaust gas power recovery turbine is typically provided with an exhaust gas power recovery turbine for each internal combustion engine.

However, many small exhaust gas power recovery turbines are poor in efficiency (better than large exhaust gas power recovery turbines), and are equipped with a large number of high speed gears, which are complicated in structure (large speed, large exhaust gas power recovery). More complicated than turbines), again with high losses and additional losses due to common gear assembly.

If multiple exhaust gas bypass lines are combined upstream of one large exhaust power recovery turbine or power turbine, the individual combustion engines may be operated when the internal combustion engines are operated at different loads and the exhaust gas pressures are different. In exhaust gas systems there are reactions between each other.

SUMMARY OF THE INVENTION An object of the present invention is an exhaust gas power recovery turbine capable of realizing improved efficiency in waste heat recovery while avoiding vibrations in turbine blades in a multi-engine system, a waste heat recovery system having such an exhaust gas power recovery turbine. And a method of operating such a waste heat recovery system.

Such a problem is solved by an exhaust gas power recovery turbine according to claim 1, a waste heat recovery system according to claim 7, and a method according to claim 10. Additional configurations of the invention are each defined in the dependent claims.

According to a first aspect of the present invention, there is provided an exhaust gas power recovery turbine for energy utilization of an internal combustion engine exhaust gas, the exhaust gas power recovery turbine comprising: a turbine housing; A rotor rotatably mounted to the turbine housing, the rotor having a plurality of turbine blades; A guide baffle disposed in the turbine housing to control exhaust gas inflow into the turbine blades, the turbine housing having a plurality of exhaust gas inlet passages for guiding exhaust gas through the guide baffle to the turbine blades, A guide baffle in which the respective exhaust gas inlet passages are separated from each other up to the guide baffle, in which a sensor for measuring exhaust gas pressure in each exhaust gas inlet passage is disposed; And pressure equalization means connected with the pressure sensors and equalizing the respective exhaust gas pressures Pi and Pl in the exhaust gas inlet passages 22a and 22b with each other.

By equalizing the pressure, vibrations in the turbine blades are reliably avoided. As such, such a single exhaust gas power recovery turbine can be provided for a multi-engine system, whereby the single exhaust gas power recovery turbine can be configured with greater and higher efficiency.

According to one embodiment of the exhaust gas power recovery turbine according to the invention, the turbine blades are formed as undamped turbine blades, in particular turbine blades without damper wire.

In a typical turbine, damper wires are used to dampen the vibrations of the turbine blades that are apart apart, which is achieved by friction at the support points of the wire. Damper wires can be guided through holes in turbine blades. Since such holes are often vulnerabilities of turbine blades resulting from blade failure therefrom, turbine blades are typically formed thick in the area of the holes. In any case, damper wires become a barrier to the flow around the turbine blade profile, thereby reducing the efficiency of the turbine.

By forming the turbine blades according to the invention as undamped turbine blades, in particular turbine blades without damper wires, such a reduction in efficiency is avoided.

According to another embodiment of the exhaust gas power recovery turbine according to the invention, the pressure equalization means connects a pressure regulating device configured to regulate the pressure in each exhaust gas inlet passage upstream of each exhaust gas inlet passage, respectively. Pressure sensors and individual pressure regulators to the turbine control unit and exhaust gas pressures in all exhaust gas inlet passages to equal set pressure levels based on the exhaust gas pressures measured by the individual pressure sensors. It is formed by configuring the turbine control device to control the individual pressure regulating devices to be adjusted.

According to another embodiment of the exhaust gas power recovery turbine according to the invention, an even set pressure level is given in advance with the mutual deviation of exhaust gas pressures of ≤ 1.0 bar.

According to another embodiment of the exhaust gas power recovery turbine according to the invention, each pressure regulating device has a throttle device for throttling the exhaust gas inlet flow into each exhaust gas inlet passage.

Alternatively or additionally, according to another embodiment of the exhaust gas power recovery turbine according to the present invention, each pressure regulating device is configured to divert the exhaust gas from the exhaust gas inlet flow to each exhaust gas inlet passage. A pass device is provided.

According to a second aspect of the invention, a waste heat recovery system is provided, which waste heat recovery system comprises a plurality of internal combustion engines each having a separate exhaust gas line and one embodiment of the first aspect of the invention described above. Or a single exhaust gas power recovery turbine according to any or all embodiments of any combination conceivable, wherein the exhaust gas line of the first internal combustion engine of the internal combustion engines is adapted for the introduction of the exhaust gas. Connected to the first exhaust gas inlet passage of the exhaust gas inlet passages of the exhaust gas power recovery turbine, and the exhaust gas line of the second internal combustion engine of the internal combustion engines for exhaust gas inlet of the exhaust gas power recovery turbine A second exhaust gas inlet passage of the passages.

By pressure equalization, the oscillation of the turbine blades is avoided. By providing a single exhaust gas power recovery turbine according to the present invention for a waste heat recovery system, the single exhaust gas power recovery turbine can be configured larger and thus with higher efficiency.

According to one embodiment of the waste heat recovery system according to the invention, the waste heat recovery system further comprises a steam turbine and a heat exchanger in each exhaust gas line, the heat exchanger providing a primary line and steam configured to flow through the exhaust gas. And a secondary line configured to connect the secondary lines of the individual heat exchangers to the steam inlet of the steam turbine.

According to another embodiment of the waste heat recovery system according to the present invention, the waste heat recovery system further includes a generator, wherein an output shaft of the exhaust gas power recovery turbine, in which the drive shaft of the generator is rotationally driven by the rotor of the exhaust gas power recovery turbine, is provided. Not only can be rotationally connected with the output shaft, but also rotationally connected with the output shaft of the steam turbine, which is rotationally driven by the rotor of the steam turbine.

According to a third aspect of the present invention, a waste heat recovery system according to one embodiment of the second aspect of the present invention described above or according to any or a plurality of embodiments in any conceivable combination is operated. A method is provided, the method comprising measuring exhaust gas pressures in individual exhaust gas inlet passages of an exhaust gas power recovery turbine, comparing measured exhaust gas pressures, and individual exhaust in the exhaust gas inlet passages Equalizing the gas pressures with each other.

By pressure equalization, the oscillation of the turbine blades is avoided. By providing a single exhaust gas power recovery turbine according to the present invention for a waste heat recovery system, the single exhaust gas power recovery turbine can be configured larger and thus with higher efficiency.

According to one embodiment of the method according to the invention, comparing the measured exhaust gas pressures determines the lowest exhaust gas pressure among the measured exhaust gas pressures, while the remaining exhaust gas pressures are the higher pressure exhaust gas pressure. Determining the set pressure level from the lowest exhaust gas pressure, and reducing the higher pressure exhaust gas pressures to the set pressure in equalizing each of the exhaust gas pressures in the exhaust gas inlet passages with each other. Include.

According to another embodiment of the method according to the invention, the equal set pressure level is adjusted to the mutual deviation of exhaust gas pressures of ≤ 1.0 bar.

According to another embodiment of the method according to the invention, reducing the exhaust gas pressures at higher pressures is performed by throttling the individual exhaust gas inlet flows into the individual exhaust gas inlet passages.

Alternatively or additionally, according to another embodiment of the method according to the invention, reducing the exhaust gas pressures of higher pressure is exhausted from the individual exhaust gas inlet flows into the individual exhaust gas inlet passages. This is done by branching the gas.

It is evident that the present invention extends to embodiments that are not given by feature combinations resulting from the explicit citations of the claims so that the disclosed features of the present invention may be combined with each other arbitrarily as long as it is technologically meaningful have.

In summary, we are an exhaust gas power recovery turbine or power turbine with a plurality of inlet connectors, ie with a turbine housing in the form of pulse charging, wherein the exhaust gas flows are turbine guide baffles (nozzle rings). It was recognized as a solution to an exhaust gas power recovery turbine or power turbine that would not be affected by each other until after mixing, and thus there would be no recoil.

In addition, the inventors have found that a turbine suffers from high vibration excitation of its turbine blades due to the non-uniformity of the exhaust gas supply during pulse supercharging operation, and thus has a robust efficiency with a damper wire or damping elements and thus poor efficiency. It was recognized that a turbine was needed.

Therefore, the present inventors propose as a solution to form the turbine blades without damper wire for the best efficiency, but to solve the problem of vibration excitation of the turbine blades caused by uneven supply of individual exhaust gas channels or exhaust gas inlet passage By individually throttling the pressure in the valves so that the exhaust gas inlet passages are operated at the same pressure level and hence speed level as much as possible.

This is achieved, for example, by measuring each pressure in the inlet pipe upstream of the turbine and adjusting each higher pressure by throttling and / or bypass control. The throttling operation results in a high exhaust gas pressure, which benefits the connected internal combustion engine and brings about a better supercharging of the internal combustion engine as long as the maximum ignition pressure allows. In bypass operation, residual heat in the exhaust gas can rise and be converted into energy in the steam turbine.

Thereby, a waste heat recovery (WHR) system for at least two internal combustion engines can be provided, for example consisting of a steam turbine and an exhaust gas power recovery turbine commonly assembled in one line with a generator. In addition, an exhaust gas power recovery turbine with at least two inlets (number and number of interconnecting internal combustion engines) can be provided without damper wires for best efficiency. In addition, regulation may be provided by a pressure measuring and regulating mechanism that ensures that the exhaust gas pressures upstream of the turbine are at a similar level (adjustment deviation is eg <= 1.0 bar).

In an exhaust gas power recovery turbine according to the invention, a waste heat recovery system having such an exhaust gas power recovery turbine, and a method of operating such a waste heat recovery system, by equalizing each of the exhaust gas pressures in the exhaust gas inlet passages, It is reliably avoided that vibrations are caused to the turbine blades. As such, such a single exhaust gas power recovery turbine can be provided for a multi-engine system, whereby the single exhaust gas power recovery turbine can be configured with greater and higher efficiency. Thus, improved efficiency in waste heat recovery can be achieved while avoiding vibration in turbine blades in a multi-engine system.

Hereinafter, the present invention will be described in detail based on preferred embodiments with reference to the accompanying drawings. In the accompanying drawings,
1 is a diagram showing a standard waste heat recovery system.
2 is a diagram showing a waste heat recovery system according to an embodiment of the present invention.
3 is a perspective view partially showing an exhaust gas power recovery turbine according to an embodiment of the present invention;
4 is a partial perspective view of two parts of the turbine housing of the exhaust gas power recovery turbine of FIG. 3 taken in plane A of FIG.
5 is a view similar to FIG. 2 with some elements of the waste heat recovery system in accordance with the present invention omitted for clarity;

1 shows a diagram of a standard waste heat recovery system 1 ′ integrated into a vessel (not all shown or otherwise indicated).

The waste heat recovery system 1 ′ of FIG. 1 has a first internal combustion engine 10 ′ and a second internal combustion engine 50 ′ which serve to drive a vessel.

Each internal combustion engine 10 ′, 50 ′ has a separate exhaust gas line 15 ′ or 55 ′ with a respective exhaust gas outlet 16 ′ or 56 ′ (communication here), each of which exhaust gas line ( A separate exhaust gas power recovery turbine or power turbine 20 'or 60' connected to each corresponding exhaust gas line 15 'or 55' so as to be driven by the exhaust gas of 15 'or 55', steam A separate heat exchanger 25 'or 65' with its primary line 25a 'or 65a' integrated into each corresponding exhaust gas line 15 'or 55' for production, and each internal combustion engine 10 Two exhaust gas turbochargers 30a ', 30b' or 70a ', 70b' connected to respective corresponding exhaust gas lines 15 'or 55' for turbo charging of 'or 50' Each exhaust gas turbine and each compressor).

The waste heat recovery system 1 'of FIG. 1 further includes a steam turbine 75' and a generator 80 '. The steam turbine 75 'is connected to each of the secondary lines 25b' or 65b 'of the heat exchangers 25' and 65 ', so that the steam turbine 75' is connected to the heat exchangers 25 '. , 65 ').

The two exhaust gas power recovery turbines 20 ', 60' can optionally be rotationally driven to the drive shaft 81 'of the generator 80' via the common gear assembly 85 'on the output side. The steam turbine 75 'is always in rotational drive connection with the drive shaft 81' of the generator 80 'via the gear 90' on the output side.

2 to 5, a waste heat recovery system 1 according to one embodiment of the present invention incorporated into a vessel (not shown in all or not separately shown) will be described.

The waste heat recovery system 1 according to the present invention includes a first internal combustion engine 10 and a second internal combustion engine 50 which serve to drive a vessel.

Each internal combustion engine 10, 50 has a separate exhaust gas line 15 or 55 having a plurality of exhaust gas pipes (not shown separately) and each exhaust gas outlet 16 or 56 (in communication here), A separate heat exchanger 25 or 65 having its primary line 25a or 65a configured to flow through the exhaust gas for steam generation in its respective exhaust gas line 15 or 55, and each internal combustion engine Two exhaust gas turbochargers 30a, 30b or 70a, 70b (each exhaust gas turbine not shown separately) connected to respective corresponding exhaust gas lines 15 or 55 for turbo charging of 10 or 50; and With each compressor).

The waste heat recovery system 1 according to the invention has two exhaust gas lines via exhaust gas pipes so that they can be driven by the exhaust gas of the two exhaust gas lines 15, 55 for the energy utilization of the internal combustion engine exhaust gas. It further comprises one exhaust gas power recovery turbine or power turbine 20 connected to the fields 15, 55.

In particular, as can be seen in FIGS. 2, 3, and 5, the exhaust gas power recovery turbine 20 is rotatable in the turbine housing 21, the turbine housing 21 having the turbine inlet housing 22. Mounted on the rotor 23 (only schematically and partially shown), with a plurality of undamped turbine blades 23a, in particular a plurality of turbine blades 23a without damper wires, in the turbine housing 21 A guide baffle 24 (or nozzle ring) disposed to control exhaust gas inlet to the turbine blades 23a, and an outlet diffuser 24a for exhausting the exhaust gas from the exhaust gas power recovery turbine 20. .

The turbine inlet housing 22 of the turbine housing 21 has a plurality of exhaust gas inlet passages for guiding exhaust gas through the guide baffles 24 to the turbine blades 23a, wherein the individual exhaust gas inlet passages are The guide baffles 24 are separated from each other. According to the embodiment of the invention described in FIGS. 2 to 5, the turbine inlet housing 22 of the turbine housing 21 extends into the partition 22c from immediately before the guide baffle 24 to the guide baffle 24. And a first exhaust gas inlet passage 22a and a second exhaust gas inlet passage 22b that are separated from each other in flow. In that regard, FIG. 4 shows, in two partial perspective views, a portion of the turbine inlet housing 22 formed similarly to a “Y-piece”, cut in plane A of FIG. 3.

The exhaust gas line 15 of the first internal combustion engine 10 is connected with the first exhaust gas inflow passage 22a of the exhaust gas power recovery turbine 20 for introduction of the exhaust gas. The exhaust gas line 55 of the second internal combustion engine 50 is connected with the second exhaust gas inflow passage 22b of the exhaust gas power recovery turbine 20 for introduction of the exhaust gas.

Although not shown in FIGS. 2 to 5, a pressure sensor is disposed in each of the exhaust gas inlet passages 22a and 22b so that the exhaust gas pressure PI or PII in each of the exhaust gas inlet passages 22a and 22b ( 2).

Upstream of each exhaust gas inlet passage 22a, 22b is connected a pressure regulating device 60a, 60b configured to adjust the exhaust gas pressure PI or PII in the respective exhaust gas inlet passage 22a, 22b. . Each pressure regulating device 60a, 60b is preferably a first valve 62a or 62b and preferably an electric motor, which can be controlled by an electronic controller 61a or 61b and preferably an electric motor (indicated by "M"). And a second valve 63a or 63b controllable (indicated by "M"). The first and second valves 62a, 63a or 62b, 63b are connected with their corresponding controller 61a or 61b for control operation.

The first valves 62a, 62b of each pressure regulating device 60a, 60b act as a throttle device to throttle the exhaust gas inlet flow into each corresponding exhaust gas inlet passage 22a or 22b. The second valves 63a, 63b of each pressure regulating device 60a, 60b serve as a bypass device for branching the exhaust gas from the exhaust gas inlet flow to each corresponding exhaust gas inlet passage 22a or 22b.

The waste heat recovery system 1 according to the invention is electrically connected to each pressure sensor for signal reception and electrically connected to the controllers 61a and 61b of the respective pressure regulating devices 60a and 60b for control operation. Also provided is a turbine control device 100. Such a turbine control device 100 measures the exhaust gas pressure measured by each pressure sensor to adjust the exhaust gas pressures PI or PII in all exhaust gas inlet passages 22a and 22b to an equivalent set pressure level. And control the controllers 61a, 61b of each pressure regulating device based on PII or PII. The equal set pressure is preferably given in advance as a mutually regulated deviation of exhaust gas pressures PI or PII of ≤ 0.2 bar.

As a result, the pressure regulating devices 60a and 60b and the turbine control device 100 are connected with the pressure sensors and separate the individual exhaust gas pressures Pi or PII in the exhaust gas inlet passages 22a and 22b from each other. A pressure equalization means configured to equalize is formed.

The waste heat recovery system 1 according to the present invention further includes a steam turbine 75 and a generator 80. The steam inlet (not shown separately) of the steam turbine 75 is the individual secondary lines 25b or 65b of the heat exchangers 25, 65 configured to provide steam through the steam pipes (not shown separately). Respectively, so that the steam turbine 75 can be driven by the steam generated by the heat exchangers 25, 65.

The drive shaft 81 of the generator 80 is via the gear 85 and the output shaft 23b of the exhaust gas power recovery turbine 20 which is rotationally driven by the rotor 23 of the exhaust gas power recovery turbine 20. It can be rotationally driven and through the gear 90 and the output shaft 75a of the steam turbine 75 which is rotationally driven by a rotor (not shown) of the steam turbine 75.

In the illustrated embodiment, the exhaust gas power recovery turbine 20 can be rotationally driven to the drive shaft 81 of the generator 80 optionally via a gear 85 and a coupling (not shown) at the output side. The steam turbine 75 is always rotationally connected to the drive shaft 81 of the generator 80 via the gear 90 on the output side.

According to the method according to the invention for operating the waste heat recovery system 1 described in FIGS. 2 to 5, at least the following steps are carried out:

Measuring exhaust gas pressures PI, PII in the individual exhaust gas inlet passages 22a, 22b by means of pressure sensors,

Comparing the measured exhaust gas pressures PI, PII in the turbine control device 100, and

Equalizing the respective exhaust gas pressures PI, PII in the exhaust gas inlet passages 22a, 22b by means of pressure equalization means.

According to the method of the present invention, comparing the measured exhaust gas pressures PI, PII determines the lowest exhaust gas pressure among the measured exhaust gas pressures PI, PII, while further determining the remaining exhaust gas pressures. Determining as high pressure exhaust gas pressures, determining a set pressure level from the lowest exhaust gas pressure, and equalizing the individual exhaust gas pressures PI, PII in the exhaust gas inlet passages 22a, 22b with each other And reducing the higher exhaust gas pressures to the set pressure level by means of pressure equalization means 60a, 60b.

According to the method of the present invention, the equal set pressure level is preferably adjusted to the mutual control deviation of the exhaust gas pressures PI and PII of ≤ 0.2 bar.

According to the method of the present invention, by throttling the exhaust gas inlet flow to the higher pressure exhaust gas inlet passage (s) by partial closing of the first valve 62a or 62b of the pressure regulating device 60a, 60b. It is desirable to reduce the exhaust gas pressures at higher pressures.

Alternatively or additionally, according to the method of the present invention, the second valves 63a, 63b of the corresponding pressure regulating devices 60a, 60b from the exhaust gas inlet flow into the higher pressure exhaust gas inlet passage (s). It is desirable to reduce the exhaust gas pressures at higher pressures by branching the exhaust gas by the opening of.

According to the method of the invention, the internal combustion engines 10, 50 can be operated with engine loads that differ by more than 50% from each other, nevertheless coupled to the generator in the internal combustion engines 10, 50. It is ensured to operate the single exhaust gas power recovery turbine 20 without recoil.

1, 1 ': waste heat recovery system
10, 10 ', 50, 50': internal combustion engine
15, 15 ', 55, 55': exhaust gas line
16, 16 ', 56, 56': exhaust gas outlet
20, 20 ', 60': exhaust gas power recovery turbine
21: turbine housing
22: turbine inlet housing
22a, 22b: exhaust gas inlet passage
22c: bulkhead
23: rotor
23a: turbine blade
23b, 75a: output shaft
24: guide baffle
24a: outlet diffuser
25, 25 ', 65, 65 ;: heat exchanger
25a, 25a ', 65a, 65a': Primary line
25b, 25b ', 65b, 65b': secondary line
30a, 30a ', 30b, 30b', 70a, 70a ', 70b, 70b': exhaust gas turbocharger
60a, 60b: pressure regulator
61a, 61b: controller
62a, 62b, 63a, 63b: valve
75, 75 ': steam turbine
80, 80 ': generator
81, 81 ': drive shaft
85, 90, 90 ': gear
85 ': common gear assembly
100: turbine control unit
PⅠ, PII: exhaust gas pressure
A: flat (cross section)

Claims (14)

An exhaust gas power recovery turbine 20 for energy utilization of internal combustion engine exhaust gas,
The turbine housing 21, a rotor 23 rotatably mounted in the turbine housing 21 and having a plurality of turbine blades 23a, and an exhaust gas disposed in the turbine housing 21 to the turbine blades 23a. Provided with a guide baffle 24 to control the inflow,
The turbine housing 21 has a plurality of exhaust gas inlet passages 22a and 22b for guiding the exhaust gas through the guide baffle 24 to the turbine blades 23a,
The individual exhaust gas inlet passages 22a, 22b are separated from each other up to the guide baffle 24,
Pressure sensors for measuring the exhaust gas pressures PI and PII in the respective exhaust gas inlet passages 22a and 22b are disposed in the respective exhaust gas inlet passages 22a and 22b,
Exhaust gas power recovery turbine 20, characterized in that it is connected to the pressure sensors and has pressure equalization means for equalizing each of the exhaust gas pressures PI, PII in the exhaust gas inlet passages 22a, 22b. ). The exhaust gas power recovery turbine (20) according to claim 1, wherein the turbine blades (23a) are formed as undamped turbine blades. 3. The pressure equalizing device (60) according to claim 1 or 2, wherein the pressure equalization means discharges each of the pressure regulating devices (60a, 60b) configured to adjust the exhaust gas pressures PI, PII in the respective exhaust gas inlet passages 22a, 22b. Connected upstream of the gas inlet passages 22a, 22b, but connecting the individual pressure sensors and the individual pressure regulators 60a, 60b with the turbine control device 100, measured by the individual pressure sensors. The individual pressure regulating devices to adjust the exhaust gas pressures PI and PII in all the exhaust gas inflow passages 22a and 22b to the uniform set pressure level based on the exhaust gas pressures PI and PII. An exhaust gas power recovery turbine (20), characterized in that it is formed by configuring the turbine control device (100) to control operation 60a, 60b. 4. An exhaust gas power recovery turbine (20) according to claim 3, characterized in that an even set pressure level is given in advance with a mutually regulated deviation of exhaust gas pressures (PI, PII) of ≤ 1.0 bar. 4. The exhaust gas power recovery according to claim 3, wherein each of the pressure regulating devices 60a, 60b has a throttle device for throttling the exhaust gas inflow flow into the respective exhaust gas inflow passages 22a, 22b. Turbine 20. 4. The exhaust of claim 3, wherein each of the pressure regulating devices 60a, 60b has a bypass device for branching the exhaust gas from the exhaust gas inlet flow into the respective exhaust gas inlet passages 22a, 22b. Gas power recovery turbine 20. A plurality of internal combustion engines 10, 50 each having a separate exhaust gas line 15, 55 and an exhaust gas power recovery turbine 20 according to claim 1,
The exhaust gas line 15 of the first internal combustion engine 10 of the internal combustion engines 10, 50 is connected to one of the exhaust gas inlet passages 22a, 22b of the exhaust gas power recovery turbine 20 for introduction of the exhaust gas. Is connected to the first exhaust gas inlet passage 22a,
The exhaust gas line 55 of the second internal combustion engine 50 of the internal combustion engines 10, 50 is provided in the exhaust gas inlet passages 22a, 22b of the exhaust gas power recovery turbine 20 for the introduction of the exhaust gas. Waste heat recovery system (1), which is connected to a second exhaust gas inlet passage (22b). 8. A further heat exchanger (25, 65) and steam turbine (75) in each exhaust gas line (15, 55), wherein the heat exchanger (25, 65) is adapted to flow through the exhaust gas. The primary lines 25a, 65a configured and the secondary lines 25b, 65b configured to provide steam, wherein the secondary lines 25b, 65b of the individual heat exchangers 25, 65 are steam turbines. Waste heat recovery system (1), characterized in that it is connected to the steam inlet of (75). 9. The exhaust gas power recovery turbine (100) according to claim 8, further comprising a generator (80), wherein the drive shaft (81) of the generator (80) is rotationally driven by the rotor (23) of the exhaust gas power recovery turbine (20). Not only can be rotationally connected to the output shaft 23b of the 20, but also can be rotationally connected to the output shaft 75a of the steam turbine 75 which is rotationally driven by the rotor of the steam turbine 75. Waste heat recovery system (1). As a method of operating the waste heat recovery system (1) according to claim 7,
Measuring exhaust gas pressures PI, PII in the individual exhaust gas inlet passages 22a, 22b,
Comparing the measured exhaust gas pressures PI, PII, and
Equalizing each of the exhaust gas pressures PI, PII in the exhaust gas inlet passages 22a, 22b with each other
Waste heat recovery system operating method comprising a. 12. The method of claim 10, wherein comparing the measured exhaust gas pressures Pi, PII determines the lowest exhaust gas pressure among the measured exhaust gas pressures Pi, PII, wherein the remaining exhaust gas pressures are higher. Determine the exhaust gas pressures of the pressure, determine the set pressure level from the lowest exhaust gas pressure,
Reducing the higher pressure exhaust gas pressures to a set pressure in the step of equalizing each of the exhaust gas pressures PI, PII in the exhaust gas inlet passages 22a, 22b with each other. How to operate the waste heat recovery system. 12. A method according to claim 11, wherein the even set pressure level is adjusted to the mutual deviation of exhaust gas pressures of ≤ 1.0 bar. 12. A method according to claim 11, wherein reducing exhaust gas pressures at higher pressures is performed by throttling individual exhaust gas inlet flows into individual exhaust gas inlet passages (22a, 22b). . 12. The waste heat according to claim 11, wherein reducing the higher pressure exhaust gas pressures is performed by branching the exhaust gas from the individual exhaust gas inlet flows into the individual exhaust gas inlet passages (22a, 22b). How to operate the recovery system.

Images