JP3706432B2 - Combined cycle power generation facility - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an oil-fired gas turbine combined cycle power generation facility.
[0002]
[Prior art]
At present, thermal power generation in Japan mainly uses a system in which a steam turbine is rotated by high-temperature and high-pressure steam generated by a boiler. As the boiler fuel, heavy oil and crude oil are mainly used. Of these, in the case of burning crude oil, low sulfur content crude oil with a high wax content and low SOx generation, such as Minas crude oil and Daqing Produced crude oil is preferred. In addition, recently, a combined cycle power generation facility using LNG, which is a high-quality fuel, has also been adopted. In power generation using the above-described boilers and steam turbines of crude oil or heavy oil, the thermal efficiency is relatively low at around 40% / HHV standard (HHV: high heating value).
[0003]
On the other hand, combined cycle power generation used in LNG burning is a method in which fuel is burned in a gas turbine, the high-temperature exhaust gas is reburned in a boiler, a steam turbine is operated, and power is generated again (so-called exhaust reburning type). The thermal efficiency is dramatically improved to around 48% / HHV standard.
[0004]
For this reason, the development of the combined cycle power generation is strongly desired in recent years when it is urged to switch to a more heat-efficient power generation method from the viewpoint of suppressing the increase in oil consumption. However, in the conventional combined cycle power generation of LNG, LNG is costly to store, and when LNG is supplied to petroleum thermal power, it is expensive to embed the pipeline.
[0005]
On the other hand, there are examples of so-called oil-fired gas turbine combined cycle power generation using crude oil as a fuel in Europe and the United States, but there are problems that many troubles occur due to impurities contained in the crude oil and maintenance costs increase. In this respect, there was a difficulty in practical use. This is because the salinity, vanadium and sulfur contained in the crude oil interact with each other to become a low melting point substance in the gas turbine and adhere to the blade, causing corrosion of the blade.
[0006]
For this reason, as a fuel for gas turbines, a standard in which the concentration of salt and vanadium is 0.5 ppm or less is generally adopted. However, low sulfur content such as Minas crude oil and Daqing crude oil is used. Even crude oil could not satisfy these standards and could not be used as a gas turbine fuel for combined cycle power generation with high thermal efficiency. Therefore, as a result, it has been difficult to put oil-fired gas turbine combined cycle power generation using crude oil as fuel for the gas turbine.
[0007]
[Problems to be solved by the invention]
In order to solve the above-mentioned impurity problem, the applicant, for example, according to Japanese Patent Application No. 4-287504 (Japanese Patent Application Laid-Open No. 6-207180), distills the desalted crude oil at a predetermined temperature to obtain a low boiling point distillation. An oil-fired gas using crude oil distillation technology, in which a low-boiling fraction is used as gas turbine fuel, while a high-boiling fraction is used as fuel for steam turbine boilers. A turbine combined cycle power generation method is proposed and put into practical use.
[0008]
By the way, in this power generation method, the high-boiling fraction after distillation is condensed by a condenser to improve the handleability and used as a turbine fuel. However, the gas generated without being fully condensed in this condenser (that is, off-gas). Because of the high temperature, there has been a demand for effective utilization of the thermal energy.
[0009]
Accordingly, the present invention is an oil-fired gas turbine combined cycle power generation facility that uses crude oil distillation technology, and the combined use of the above-described condenser off-gas thermal energy enables effective use of the thermal energy to achieve more efficient power generation. It aims to provide cycle power generation facilities.
[0010]
[Means for Solving the Problems]
In order to achieve the above object, the combined cycle power generation facility according to claim 1, wherein the crude oil is distilled at a predetermined temperature to be separated into a low boiling fraction and a high boiling fraction, and the low boiling fraction is gas turbine. In a combined cycle power generation facility that uses the high-boiling fraction as fuel for a steam turbine boiler, heat is recovered from off-gas generated in a condenser that condenses the low-boiling fraction before the distillation. A crude oil preheater for heating the crude oil is provided , and the crude oil preheater is disposed at the upstream position of another crude oil preheater for heating the crude oil before distillation by the low boiling fraction .
[0011]
Further, the combined cycle power generation facility according to claim 2, the crude oil is distilled at a predetermined temperature to be separated into a low boiling fraction and a high boiling fraction, and the low boiling fraction is used as a fuel for a gas turbine. In a combined cycle power generation facility that uses the high-boiling fraction as fuel for a steam turbine boiler, heat is recovered from off-gas generated in a condenser that condenses the low-boiling fraction, and the feed water to the boiler is heated. A feed water heater is provided , and the feed water heater is arranged at the leading position of other heaters in the steam cycle .
[0012]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described below with reference to the drawings.
[0013]
(First example)
First, a first example which is an example of the invention described in claim 1 will be described. FIG. 1 shows the configuration of the fuel supply system in the combined cycle power generation facility of this example, and FIG. 2 shows the configuration of the power generation system in the combined cycle power generation facility.
[0014]
As shown in FIG. 1, the fuel supply system of this power generation facility includes a crude oil tank 1, a crude oil supply pump 2, a crude oil preheater 3-6, a crude oil heating furnace 7, a distillation tower 8, a condenser 9 as shown in FIG. , Gas turbine fuel supply pump 10, reflux pump 11, gas turbine fuel tank 12, boiler fuel supply pump 13, boiler fuel tank 14, feed water heaters 15 and 16, and crude oil preheater 17.
[0015]
The crude oil tank 1 stores crude oil, and it is preferable to use a low-sulfur crude oil that has been desalted as the crude oil. As this low-sulfur crude oil, since the desulfurization process of exhaust gas can be simplified, it is needless to say that a low sulfur content is preferable. Usually, the sulfur content is 1% by weight or less, more preferably 0.5%. Less than wt% crude oil is used. Examples of such crude oil include the aforementioned Minas crude oil and Daqing crude oil.
[0016]
In addition, since most sulfur content contained in crude oil is isolate | separated by distillation mentioned later, it is not necessary to necessarily use the above low sulfur crude oil as crude oil of this invention.
[0017]
Further, the salinity contained in the crude oil is likely to remain on the high-boiling fraction side by distillation using the distillation column 8, and depending on the distillation temperature conditions, the salinity content of the low-boiling fraction may be the above-mentioned reference value (0.5 ppm). Therefore, the crude oil of the present invention does not necessarily have to be desalted.
[0018]
In addition, when the desalination treatment is performed in the same facility, a heating means for preheating the crude oil to about 80 to 150 ° C. is provided, and for example, a plurality of stages of diso-routers as well-known desalting means are provided as necessary. Just do it. This disorouter mixes heated crude oil and fresh water and applies a static voltage of, for example, about 20,000 volts to agglomerate and separate the water droplets, lowering the viscosity of the crude oil and separating it by the difference in specific gravity between water and crude oil. In order to facilitate, it is preferable to preheat the crude oil as described above.
[0019]
In addition, the said disorouter is arrange | positioned in the middle of the crude oil supply line 21 which supplies crude oil from the crude oil tank 1 to the crude oil heating furnace 7, and some of the crude oil preheaters 3-6 are heated for the said desalination process. It can also function as a means.
[0020]
The crude oil supply pump 2 sends out the crude oil in the crude oil tank 1 and pumps it to the crude oil heating furnace 7 and further to the distillation tower 8 through the crude oil supply line 21. In this case, the crude oil heating furnace 7 burns crude oil in the crude oil tank 1 or crude oil, light oil, kerosene, naphtha, LPG, etc. prepared separately from the power generation fuel, and sends the crude oil sent to the distillation tower 8 to a predetermined distillation. Heat to temperature.
[0021]
The distillation temperature (the crude oil temperature at the inlet of the distillation column 8) is adjusted to the properties of the crude oil so that the content of vanadium, salt or sulfur in the low-boiling distillate used as the gas turbine fuel becomes a desired value. For example, it is about 340 ° F. to 650 ° F.
[0022]
In this case, the crude oil preheaters 3 and 4 or the crude oil preheaters 5 and 6 are gas derived from the top of the distillation column 8 (ie, low boiling fraction) or liquid derived from the bottom of the distillation column 8 (ie, It is a heat exchanger that recovers heat in two stages from the high-boiling fraction) and sequentially heats the crude oil before it is sent to the crude oil heating furnace 7. The crude oil preheater 17 is a heat exchanger that recovers heat from off-gas generated in the condenser 9 described later and heats the crude oil in the upstream of the crude oil preheater 3. As a result, the heating efficiency of the crude oil heating furnace 7 is reduced. In particular, in this example, heat is also recovered from the off-gas of the condenser 9, and the thermal energy of distillation is effectively used without leakage.
[0023]
In this case, the distillation column 8 is a system in which the low-boiling fraction derived from the top of the column is returned as a liquid by the reflux pump 11 and the reflux line 22 to come into contact with the generated steam of the crude oil and increase the degree of separation. For example, a bubble tower, a perforated plate tower, or a packed tower can be used.
[0024]
The condenser 9 is, for example, a multi-tube heat exchanger that finally cools and condenses the gas (that is, the low-boiling fraction) led out from the top of the distillation column 8 by the liquid line 23 and cannot be condensed. The gas (off-gas G) is discharged as a high-temperature gas of about 40 ° C. from the top and introduced into the crude oil preheater 17 described above. The off-gas G may be used as a fuel for the crude oil heating furnace 7.
[0025]
The low-boiling fraction of crude oil condensed in the condenser 9 is withdrawn from the bottom, and a part thereof is returned to the distillation column 8 by the reflux pump 11 and the reflux line 22, and the remainder is gas as the gas turbine fuel. The turbine fuel supply pump 10 sends the fuel to the gas turbine fuel tank 12.
[0026]
The boiler fuel supply pump 13 pumps the liquid derived from the bottom of the distillation column 8 (ie, the high boiling fraction) to the boiler fuel tank 14 through the liquid line 24. The feed water heaters 15 and 16 heat the gas derived from the top of the distillation column 8 (ie, the low boiling fraction) or the liquid derived from the bottom of the distillation column 8 (ie, the high boiling fraction). It is a heat exchanger that heats boiler feed water that is recovered and sent to a boiler 35 described later.
[0027]
Next, as shown in FIG. 2, the power generation system of this power generation facility includes, as shown in FIG. 2, a gas turbine 34, a boiler 35, a steam turbine 36, a condensate comprising a turbine body 31, a compressor 32, and a combustor 33. A container 37 and an economizer 38 are provided. Here, the gas turbine 34 causes the gas turbine fuel supplied from the gas turbine fuel tank 12 through the supply line 41 in the combustor 33 to come into contact with the air compressed by the compressor 32 and burns, and in the turbine 31. In this case, the exhaust gas after combustion (residual oxygen concentration of about 11% to 15%, temperature of 580 ° C. is formed in order to form an exhaust gas reburning combined cycle. Degree) is supplied to the boiler 35 via the exhaust gas line 42.
[0028]
The boiler 35 is a Stirling boiler, for example, and has a convection heat transfer section 35a. The boiler 35 is supplied with the high-boiling fraction in the above-described boiler fuel tank 14 via the supply line 43 as fuel, and the smoke exhausted from the boiler 35 is omitted through the smoke exhaust line 44. In addition to passing through the denitration device and the dust collector, heat is recovered by the economizer 38, guided to a chimney (not shown), and released to the atmosphere. Depending on the properties of the crude oil, a desulfurization device for removing sulfur (especially sulfurous acid gas) from the flue gas may be provided. Further, the economizer 38 is a heat exchanger that heats boiler feed water by the heat of smoke discharged from the boiler 35 in order to improve the thermal efficiency of the steam cycle.
[0029]
Although detailed illustration is omitted in FIG. 2 because it is complicated, the steam cycle system including the steam turbine 36 has a high pressure so as to form a so-called recombustion cycle as in the configuration example of FIG. 4 described later. In addition to having a configuration including a plurality of stages of steam turbines such as medium pressure and low pressure, a plurality of extraction water heaters are provided in order to form a so-called regeneration cycle, and a high thermal efficiency is ensured. Is of course preferred. In the case of this example, the feed water heaters 15 and 16 (not shown in FIG. 2) shown in FIG. 1 also heat the feed water sent from the condenser 37 to the boiler 35 to further increase the thermal efficiency of the steam cycle. It is increasing.
[0030]
According to the combined cycle power generation facility configured as described above, a fuel (low boiling fraction) suitable for the gas turbine 34 is continuously supplied by distillation of crude oil, and the gas turbine caused by impurities as described above. While avoiding problems such as the corrosion of 34 blade metals, more efficient power generation utilizing the advantages of combined cycle power generation is realized.
[0031]
That is, in FIG. 1, the crude oil sent from the crude oil tank 1 by the crude oil supply pump 2 is heated to, for example, 270 ° C. or more by the crude oil preheater 17 and the crude oil preheaters 3 to 6, and in this case, the crude oil provided independently. It is finally heated to a predetermined distillation temperature by the heating furnace 7.
[0032]
If the distillation temperature is maintained at a predetermined distillation temperature in this way, the vanadium and salt content concentration of the low boiling fraction (that is, gas turbine fuel) derived from the top of the distillation column 8 can be easily obtained. The reference value can be maintained below 0.5 ppm (wt.), And the sulfur content is also 0.5 to 0.05 wt. % Or less.
[0033]
That is, most heavy metals remain in a high-boiling fraction at about 900 ° F. or higher in the case of atmospheric distillation, and most salts remain in a high-boiling fraction at about 420 ° C. (788 ° F.) or higher. In this case, most of these impurities remain on the high-boiling fraction side and are contained in the boiler fuel sent to the boiler fuel tank 14. In the boiler 35, since heavy oil or the like has been burned conventionally, even a fuel containing such impurities can be operated without any problem.
[0034]
Thus, the fuel having a sufficiently low impurity concentration is continuously supplied from the gas turbine fuel tank 12 to the gas turbine 34, and the high-temperature exhaust gas discharged from the gas turbine 34 is introduced into the boiler 35 and reburned. High-efficiency combined cycle power generation using crude oil that is easy to store can be operated with high reliability without causing trouble due to impurities in the crude oil.
[0035]
In this example, the crude oil preheater 17 together with the crude oil preheaters 3 to 6 recovers the thermal energy generated by the distillation without leakage and preheats the crude oil in the upstream of the crude oil heating furnace 7. For this reason, the required heating amount in the crude oil heating furnace 7 is reduced, the consumption amount of fuel used in the crude oil heating furnace 7 can be saved, and the operation cost can be reduced. The off-gas G of the condenser 9 may be introduced into the crude oil heating furnace 7 after passing through the crude oil preheater 17 as described above, and used as a part of the fuel of the crude oil heating furnace 7. In addition, fuel consumption can be saved.
[0036]
(Second example)
Next, a second example which is an example of the invention described in claim 2 will be described. FIG. 3 shows the configuration of the fuel supply system in the combined cycle power generation facility of this example, and FIG. 4 is a diagram showing a detailed configuration example of the steam cycle of the combined cycle power generation facility. The overall configuration of the power generation system in this example is the same as the configuration of the first example (configuration shown in FIG. 1).
[0037]
As shown in FIG. 3, the present example is characterized in that a feed water heater 18 is provided instead of the crude oil preheater 17 in the first example, and the other configurations are the same as those in the first example. Since there is, explanation is omitted.
[0038]
The feed water heater 18 is a heat exchanger that recovers heat from the off-gas generated in the condenser 9 and heats the feed water of the boiler 35, whereby the thermal energy of distillation is effectively used without leakage and includes the boiler 35. The heating efficiency of the steam cycle is increased.
[0039]
That is, the steam cycle in the power generation facility of this example is configured in detail as shown in FIG. 4, for example, and this will be described below. Here, a high-pressure turbine 53, an intermediate-pressure turbine 56, and low-pressure turbines 58 and 59, which will be described later, function as the steam turbine 36 in FIG.
[0040]
In FIG. 4, the high-pressure steam generated by heating by the boiler 35 is first introduced into the high-pressure turbine 53 through the piping line 52, expands and drives the turbine blades, is returned to the boiler 35 by the line 54, and is recycled. After being heated, it is introduced to the intermediate pressure turbine 56 by line 55 to work again. The low-pressure steam that has been expanded by working in the intermediate-pressure turbine 56 is guided by a line 57, and in this case, is branched and introduced into two low-pressure turbines 58 and 59 provided in parallel. Do more work at. The steam expanded by working in the low-pressure turbines 58 and 59 is introduced into the condenser 37 having a negative internal pressure through the line 60 and condensed.
[0041]
The condensed water in the condenser 37 is sent out by a pump 62 as boiler feed water, and is first heated by the heat of the off-gas G by the feed water heater 18, and then flows out from the bearing portion of each turbine by the heater 63. The steam J is heated by the heat of the steam J. Thereafter, the boiler feed water is sequentially heated by a large number of extraction water heaters 71 to 78 and feed water heaters 15 and 16, and finally sent to the boiler 35 via a line 64.
[0042]
Here, the extraction water heater 71, 72, 73, 74 are so-called surface type extraction water heaters, which are extracted from the four stages of the low-pressure turbines 58, 59 through lines 81, 82, 83, 84, respectively. The boiler feed water is sequentially heated by a part of the generated steam. The steam extracted by the line 81 exits the extraction water heater 71 and is then introduced into the condenser 37 by the line 91 to be condensed and become part of the boiler water supply.
[0043]
Moreover, after the steam extracted by the line 82 exits the extraction water heater 72, it is mixed with the boiler water at the inlet side of the extraction water heater 73 by the line 92 and becomes a part thereof. Also, the steam extracted by the lines 83 and 84 exits the extraction water heater 73 and 74, and then is sent to the extraction water heater 72 or 73 by the line 93 or 94, respectively. On the inlet side of the feed water heater 73, it is mixed with boiler feed water and becomes a part thereof.
[0044]
Further, the extraction water heater 75 is a so-called mixing type extraction water heater, and is configured to mix a part of steam extracted by a line 85 from the position of the rear stage of the intermediate pressure turbine 56 with the boiler supply water. The water supply is heated. The boiler feed water after mixed heating exits the extraction water heater 75 and is then introduced into the extraction water heater 76 via a line 95.
[0045]
The extraction feed water heating air 76, 77, 78 is a surface extraction water supply heater, and is extracted from the middle stage of the intermediate pressure turbine 56 and the middle stage or the rear stage of the high pressure turbine 53 by lines 86, 87, 88, respectively. The boiler feed water is sequentially heated by a part of the steam. Here, after the steam extracted by the line 86 exits the extraction water heater 76, it is introduced into the extraction water heater 75 by the line 96 and mixed into the boiler water to become a part thereof.
[0046]
Further, the steam extracted by the lines 87 and 88 also leaves the extraction water heaters 77 and 78, and then is sent to the extraction water heater 76 or 77 through the lines 97 and 98, respectively, and finally the extraction water heater It is introduced into 75 and mixed with boiler feed water to become a part thereof.
[0047]
The lines 92 and 95 are provided with pumps 99 and 100 for boosting and feeding the boiler feed water, and the pump 100 is appropriately replenished with water W. The feed water heaters 15 and 16 are connected to the extraction feed water heater 71 on the inlet side and the inlet side of the extraction feed water heater 72, respectively, as shown in FIG. The boiler feed water is heated by the residual heat of the crude oil (low boiling fraction, high boiling fraction) after distillation.
[0048]
Further, during this steam cycle, the feed water heater 18 is connected to the inlet side of the heater 63 as shown in FIG. 3, for example, and boiler feed water is supplied by the residual heat of the off-gas G of the condenser 9 described above with reference to FIG. Heat.
[0049]
In FIG. 3, the economizer 38 shown in FIG. 2 is not shown, but the economizer 38 is also connected to the boiler feed water heating line in the same manner as the feed water heaters 15 and 16, and the boiler. The boiler feed water is heated by the heat of the smoke of 35 to contribute to the improvement of thermal efficiency.
[0050]
The boiler feed water temperature is typically about 33 ° C. on the outlet side of the condenser 37, usually about 64 ° C. on the outlet side of the extraction water heater 71, and usually about 84 ° C. on the outlet side of the extraction water heater 72. The outlet side of the extraction water heater 73 is normally about 120 ° C., the outlet side of the extraction water heater 74 is usually about 140 ° C., and finally the outlet side of the extraction water heater 78 is normally about 283 ° C. And sent to boiler 1.
[0051]
According to the combined cycle power generation facility of the second example configured as described above, fuel suitable for the gas turbine 34 (low boiling fraction) is continuously supplied by distillation of crude oil, as in the first example. While avoiding the problems such as the corrosion of the blade metal of the gas turbine 34 caused by the impurities as described above, more efficient power generation utilizing the advantages of combined cycle power generation is realized.
[0052]
In this example, the feed water heaters 18 are connected together with the feed water heaters 15 and 16 in the steam cycle, for example, as shown in FIG. 3, and the crude oil after distillation (low boiling fraction, high boiling fraction) and The boiler feed water is heated by the residual heat recovered from the off-gas G described above.
[0053]
Therefore, in this case, the burden on the extraction water heater 71 and the extraction water heater 72 is greatly reduced, and the amount of extraction from the lines 81 and 82 can be reduced. As a result, the thermal efficiency of the steam cycle can be improved and the energy can be effectively used.
[0054]
In other words, the steam cycle of this type of thermal power generation facility has hitherto been made through various improvements for improving efficiency, and as described above, a plurality of high-pressure, medium-pressure, and low-pressure steam turbines, and each turbine The steam is extracted from a plurality of locations, and has a complicated configuration composed of a large number of extraction water heaters that sequentially heat boiler feed water, and there has been a limit to improving thermal efficiency. However, when the feed water heaters 15 and 16 and the feed water heater 18 for heating the feed water using the residual heat of distillation for fuel production are provided as in this example, the boiler, the turbine, or the extraction water feed heater is provided. Thus, the thermal efficiency can be further improved without modifying the configuration of the equipment and the like, and the residual heat of the distillation is effectively used.
[0055]
【The invention's effect】
According to the combined cycle power generation facility of claim 1, crude oil is distilled at a predetermined temperature to be separated into a low boiling fraction and a high boiling fraction, and the low boiling fraction is used as a fuel for a gas turbine. In a combined cycle power generation facility that uses the high-boiling fraction as fuel for a steam turbine boiler, the crude oil before distillation is heated by recovering heat from off-gas generated in a condenser that condenses the low-boiling fraction. A crude oil preheater was provided , and the crude oil preheater was disposed at the upstream position of another crude oil preheater that heated the crude oil before distillation by the low boiling fraction . For this reason, the thermal energy generated by distillation is recovered without omission, reducing the burden on the crude oil heating furnace that heats the crude oil to the degree of distillation, and the fuel can be further saved.
[0056]
Therefore, the advantages of combined cycle power generation while continuously supplying fuel suitable for gas turbines (low boiling fraction) and avoiding the problems of gas turbine blade metal corrosion due to impurities as described above. High-efficiency power generation that makes the best use of can be realized with higher efficiency.
[0057]
According to the combined cycle power generation facility of claim 2, crude oil is distilled at a predetermined temperature to be separated into a low boiling fraction and a high boiling fraction, and the low boiling fraction is used as a fuel for a gas turbine. In a combined cycle power generation facility that uses the high-boiling fraction as fuel for a steam turbine boiler, heat is recovered from off-gas generated in a condenser that condenses the low-boiling fraction and heats the feed water to the boiler A feed water heater was provided , and the feed water heater was disposed at the leading position of the other heaters in the steam cycle .
[0058]
For this reason, in the steam cycle including the steam turbine, the burden on the extraction water heater can be reduced and the amount of extraction from the steam turbine can be reduced, so that the output of the steam turbine can be increased by that amount compared to the conventional one. As a result, the thermal efficiency of the steam cycle can be further improved and the energy can be effectively used beyond the conventional limit.
[0059]
Therefore, the advantages of combined cycle power generation while continuously supplying fuel suitable for gas turbines (low boiling fraction) and avoiding the problems of gas turbine blade metal corrosion due to impurities as described above. High-efficiency power generation that makes the best use of can be realized with higher efficiency.
[Brief description of the drawings]
FIG. 1 is a diagram showing a configuration of a fuel supply system of a combined cycle power generation facility that is a first example of the present invention.
FIG. 2 is a diagram showing a power generation system of the combined cycle power generation facility.
FIG. 3 is a diagram showing a configuration of a fuel supply system of a combined cycle power generation facility that is a second example of the present invention.
FIG. 4 is a diagram showing a detailed configuration example of a steam cycle of the combined cycle power generation facility.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Crude oil tank 7 Crude oil heating furnace 8 Distillation towers 15, 16, 18 Feed water heater 17 Crude oil preheater 34 Gas turbine 35 Boiler 36 Steam turbine 37 Condenser 53 High pressure turbine (steam turbine)
56 Medium pressure turbine (steam turbine)
58,59 Low pressure turbine (steam turbine)

Claims (2)

The crude oil is distilled at a predetermined temperature to be separated into a low boiling fraction and a high boiling fraction, the low boiling fraction is used as a gas turbine fuel, and the high boiling fraction is used as a steam turbine boiler fuel. in combined cycle power generation facility that uses, said heat recovery from the off-gas generated in the condenser for condensing the low boiling fraction provided crude oil preheater heats the oil prior to the distillation, the crude oil preheaters, the low A combined cycle power generation facility, characterized in that the combined cycle power generation facility is disposed at a upstream position of another crude oil preheater for heating the crude oil before distillation by a boiling fraction . The crude oil is distilled at a predetermined temperature to be separated into a low boiling fraction and a high boiling fraction, the low boiling fraction is used as a gas turbine fuel, and the high boiling fraction is used as a steam turbine boiler fuel. In the combined cycle power generation facility to be used, a feed water heater for recovering heat from off-gas generated in a condenser for condensing the low boiling fraction and heating feed water to the boiler is provided , and the feed water heater is a steam cycle A combined cycle power generation facility, which is arranged at the head position of other heaters inside .

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