JP2024030130A - Steam turbine power generation equipment using oxygen-hydrogen combustion - Google Patents

Abstract

The present invention provides a steam turbine power generation facility using oxyhydrogen combustion that reduces heat loss and increases efficiency in a steam generator by using oxyhydrogen combustion, and prevents emissions of greenhouse gases and the like. A steam turbine power generation facility 1 according to an embodiment includes a steam generator 10 that generates steam using reaction heat generated by combustion of oxygen and hydrogen, a high-pressure turbine 21 into which steam is introduced from the steam generator 10, and a high-pressure The steam discharged from the turbine 21 is introduced into the combustor 30 which burns oxygen and hydrogen to reheat the introduced steam, and the steam discharged from the combustor 30 is introduced into the high-pressure turbine 21. It includes a low-pressure turbine 22 into which steam discharged from the low-pressure turbine 22 is introduced as a cooling medium, and a condenser 23 which condenses the steam discharged from the low-pressure turbine 22. [Selection diagram] Figure 1

Description

Embodiments of the present invention relate to steam turbine power generation equipment using oxyhydrogen combustion.

Conventional thermal power generation equipment includes steam power generation equipment that includes a boiler and a steam turbine, and gas turbine combined cycle power generation equipment that includes a gas turbine, a heat recovery steam generator (HRSG), and a steam turbine.

In conventional thermal power generation equipment, steam introduced into a steam turbine is generated in a boiler or an exhaust heat recovery boiler. The boiler of steam power generation equipment heats feed water through heat exchange with combustion gas to generate steam. The exhaust heat recovery boiler of a gas turbine combined cycle power generation facility heats feed water and generates steam through heat exchange with the exhaust gas discharged from the gas turbine. In this manner, in conventional thermal power generation equipment, feed water is evaporated to generate steam using the amount of heat obtained through heat exchange with high-temperature gas.

Japanese Patent Application Publication No. 2000-346301

In the conventional thermal power generation equipment described above, the high-temperature gas used to generate steam is exhausted after heat exchange. Generally, among the heat losses in boilers and exhaust heat recovery boilers, heat loss due to exhaust heat is said to be the largest.

Furthermore, in conventional thermal power generation equipment, high-temperature gas is produced by burning fossil fuel and air. Therefore, the high temperature gas includes carbon dioxide (CO ₂ ), nitrogen oxides (NO _x ), and the like. In recent years, efforts have been made to achieve carbon neutrality, which means reducing greenhouse gas emissions to virtually zero, and regulations on emissions of carbon dioxide (CO ₂ ), nitrogen oxides (NO _x ), etc. are becoming increasingly strict. be.

The problem to be solved by the present invention is that by using oxy-hydrogen combustion, it is possible to reduce heat loss and increase efficiency in a steam generator, and at the same time, it is possible to use oxy-hydrogen combustion to prevent the emission of greenhouse gases. Its purpose is to provide turbine power generation equipment.

A steam turbine power generation facility using oxygen-hydrogen combustion according to an embodiment includes a steam generator that generates steam using reaction heat generated by combustion of oxygen and hydrogen, and a first steam turbine into which steam is introduced from the steam generator. , a first combustor into which steam discharged from the first steam turbine is introduced and which burns oxygen and hydrogen to reheat the introduced steam; It includes a second steam turbine into which steam is introduced, and a condenser that condenses the steam discharged from the second steam turbine.

FIG. 1 is a system diagram schematically showing the configuration of a steam turbine power generation facility according to a first embodiment. FIG. 2 is a system diagram schematically showing another form of the steam turbine power generation equipment of the first embodiment. FIG. 2 is a system diagram schematically showing another form of the steam turbine power generation equipment of the first embodiment. FIG. 2 is a system diagram schematically showing another form of the steam turbine power generation equipment of the first embodiment. FIG. 2 is a system diagram schematically showing the configuration of a steam turbine power generation facility according to a second embodiment. FIG. 7 is a system diagram schematically showing another form of the steam turbine power generation equipment of the second embodiment. FIG. 2 is a system diagram schematically showing the configuration of a steam turbine power generation facility according to a third embodiment. FIG. 7 is a system diagram schematically showing another form of the steam turbine power generation equipment of the third embodiment. FIG. 3 is a system diagram schematically showing the configuration of a steam turbine power generation facility according to a fourth embodiment. FIG. 7 is a system diagram schematically showing another form of the steam turbine power generation equipment according to the fourth embodiment. FIG. 3 is a system diagram schematically showing the configuration of a steam turbine power generation facility according to a fifth embodiment. It is a system diagram which shows typically other forms in the steam turbine power generation equipment of a 5th embodiment. It is a system diagram which shows typically other forms in the steam turbine power generation equipment of a 5th embodiment. FIG. 3 is a system diagram schematically showing the configuration of a steam turbine power generation facility according to a sixth embodiment. FIG. 7 is a system diagram schematically showing another form of the steam turbine power generation equipment of the sixth embodiment. FIG. 3 is a system diagram schematically showing the configuration of a steam turbine power generation facility according to a seventh embodiment. It is a system diagram which shows typically other forms in the steam turbine power generation equipment of a 7th embodiment. It is a system diagram which shows typically other forms in the steam turbine power generation equipment of a 7th embodiment.

Embodiments of the present invention will be described below with reference to the drawings.

(First embodiment)
FIG. 1 is a system diagram schematically showing the configuration of a steam turbine power generation facility 1 according to a first embodiment. Note that the steam turbine power generation equipment 1 functions as a steam turbine power generation equipment using oxygen-hydrogen combustion.

As shown in FIG. 1, the steam turbine power generation equipment 1 includes a steam generator 10, a steam turbine system 20, and a generator 50 as main components.

The steam generator 10 generates steam using reaction heat generated by combustion of oxygen and hydrogen. The steam generator 10 includes a hydrogen supply section 11 that supplies hydrogen, an oxygen supply section 12 that supplies oxygen, and a water supply section 13 that supplies water that is turned into steam. The water supply unit 13 supplies water supplied via a water supply pipe 39 (described later) into water vapor generated by combustion of oxygen and hydrogen.

In the steam generator 10, steam is generated by combustion of oxygen and hydrogen, and steam is also generated from feed water by the reaction heat of oxygen and hydrogen. That is, the medium discharged from the steam generator 10 is steam. Note that the flow rates of oxygen and hydrogen supplied to the steam generator 10 are adjusted as appropriate based on, for example, the temperature setting of the steam to be generated. The flow rates of oxygen and hydrogen are adjusted, for example, to a stoichiometric mixing ratio (equivalent ratio of 1). Note that the equivalence ratio here is an equivalence ratio calculated based on the fuel flow rate and the oxygen flow rate.

The steam turbine system 20 includes a high-pressure turbine 21 , a low-pressure turbine 22 , a condenser 23 , a combustor 30 , a feedwater pump 24 , and a feedwater heater 25 . Note that the high-pressure turbine 21 functions as a first steam turbine, and the low-pressure turbine 22 functions as a second steam turbine. Combustor 30 functions as a first combustor.

The low pressure turbine 22 is provided downstream of the high pressure turbine 21 in the flow direction of the steam flow. The high-pressure turbine 21, the low-pressure turbine 22, and the generator 50 are arranged, for example, on the same axis, and are configured such that their respective rotors rotate integrally. Note that in FIG. 1, the rotor is indicated by a chain line.

A steam inlet of the high-pressure turbine 21 is connected to the steam generator 10 via a main steam pipe 35. A steam outlet of the high pressure turbine 21 is connected to the low pressure turbine 22 via a steam pipe 36.

The combustor 30 burns oxygen and hydrogen. The combustor 30 is interposed in a steam pipe 36, for example. The combustor 30 includes a hydrogen supply section 31 that supplies hydrogen and an oxygen supply section 32 that supplies oxygen. In the combustor 30, water vapor is generated as combustion gas.

Additionally, steam discharged from the high-pressure turbine 21 is introduced into the combustor 30 . The combustor 30 reheats the introduced steam with the generated steam.

Note that the flow rates of oxygen and hydrogen supplied to the combustor 30 are adjusted as appropriate based on, for example, the temperature setting of the steam to be generated. The flow rates of oxygen and hydrogen are adjusted, for example, to a stoichiometric mixing ratio (equivalence ratio of 1). Moreover, although an example in which the combustor 30 is interposed in the steam pipe 36 is shown here, the combustor 30 may be provided at the steam inlet of the low-pressure turbine 22.

A steam inlet of the low pressure turbine 22 is connected to the combustor 30 via a steam pipe 36. Further, a part of the steam discharged from the high-pressure turbine 21 is introduced into the low-pressure turbine 22 as a cooling medium via a cooling medium supply pipe 37 . One end of the coolant supply pipe 37 is connected to a steam pipe 36 between the high pressure turbine 21 and the combustor 30, for example. The other end of the coolant supply pipe 37 is connected to a coolant inlet of the low pressure turbine 22 .

Although not shown, the cooling medium supply pipe 37 is provided with a flow rate adjustment valve for adjusting the flow rate of the cooling medium introduced into the low-pressure turbine 22. The temperature of the cooling medium is lower than the temperature of the steam introduced from the combustor 30 to the low pressure turbine 22. The temperature of the cooling medium is set, for example, to a temperature that can maintain the constituent members of the low-pressure turbine 22 at a temperature lower than the allowable temperature limit of the constituent members.

By introducing a cooling medium into the low pressure turbine 22, the components of the low pressure turbine 22 can be cooled. Thereby, the temperature of the steam introduced from the combustor 30 can be increased.

A steam outlet of the low pressure turbine 22 is connected to the condenser 23 via an exhaust pipe 38. The condenser 23 is connected to the water supply section 13 of the steam generator 10 via a water supply pipe 39. For example, a water supply pump 24 and a water supply heater 25 are interposed in the water supply pipe 39 .

The feed water pump 24 pumps condensate generated in the condenser 23 to the steam generator 10 as feed water. Feedwater heater 25 is connected to low pressure turbine 22 via bleed pipe 40 . Bleed air from the low pressure turbine 22 is introduced into the feedwater heater 25 via a bleed pipe 40 .

Here, FIG. 1 shows an example in which the bleed pipe 40 is provided with a temperature reduction section 110. The temperature reducing section 110 has a function of lowering the temperature of the bleed air flowing through the bleed air pipe 40. The temperature reduction section 110 is configured with a heat exchanger that exchanges heat between the bleed air flowing through the bleed pipe 40 and the supplied water. The temperature reducing section 110 is connected to a water supply outlet pipe 111 that leads water from the water supply pipe 39 to the temperature reducing section 110 and a water supply introduction pipe 112 that introduces water from the temperature reducing section 110 to the water supply pipe 39 . The water supply pipe 112 is connected to the water supply pipe 39 on the downstream side of the water supply pipe 111 . Note that the temperature of the supply water led out to the temperature reduction section 110 via the water supply outlet pipe 111 is lower than the temperature of the bleed air flowing through the bleed air pipe 40.

The water supplied from the water supply pipe 39 to the temperature reducing section 110 via the water supply outlet pipe 111 exchanges heat with the bleed air flowing through the bleed air pipe 40 to lower the temperature of the bleed air. Note that the temperature of the feed water increases by exchanging heat with the extracted air. The water supply whose temperature has increased is introduced into the water supply pipe 39 via the water supply introduction pipe 112.

High-temperature steam obtained by reheating steam exhausted from the high-pressure turbine 21 in the combustor 30 is introduced into the low-pressure turbine 22 . Therefore, depending on the bleed air conditions, the temperature of the bleed air flowing through the bleed air pipe 40 may exceed the temperature required by the feedwater heater 25. In such a case, by providing the temperature reduction section 110, the temperature of the feed water can be raised and the temperature of the bleed air introduced into the feed water heater 25 can be lowered to an appropriate temperature. Although an example in which the air bleed pipe 40 is provided with the temperature reduction section 110 is shown here, the air bleed pipe 40 may be configured without the temperature reduction section 110 depending on the air bleed conditions.

The feed water heater 25 is connected to the condenser 23 via a discharge pipe 41, for example. The bleed air that heated the feed water is introduced into the condenser 23 through the discharge pipe 41, for example. Note that the bleed air that heated the water supply may be introduced into the water supply pipe 39 on the upstream side or the downstream side of the water supply pump 24. Note that the feed water heater 25 may be configured to have a deaeration function.

Here, the water supply pipe 39 may be equipped with a plurality of water supply pumps. Depending on the pressure of the feed water required in the steam generator 10, for example, a high-pressure feed water pump or the like may be further provided downstream of the feed water heater 25.

Further, the feed water heater is appropriately arranged according to the temperature of the feed water required in the steam generator 10. Therefore, there are cases where a feed water heater is not provided or where a plurality of feed water heaters are provided. Note that if a feed water heater is not provided, the configuration of the air bleed pipe 40 and the discharge pipe 41 is unnecessary.

Further, the water supply pipe 39 is provided with a discharge pipe 42 for removing the amount of water obtained by condensing the water vapor produced in the steam generator 10 and the combustor 30 from the condensate produced in the condenser 23. . Note that the discharge pipe 42 is provided with a flow rate adjustment valve (not shown) that adjusts the amount of water to be discharged. The discharge pipe 42 is connected to a water supply pipe 39 downstream of the water supply pump 24, for example.

Here, the water discharged from the discharge pipe 42 may be supplied to, for example, external hot water utilization equipment that utilizes hot water. Further, depending on the hot water temperature required in the hot water utilization equipment, for example, the position where the discharge pipe 42 is connected to the water supply pipe 39 may be changed as appropriate. For example, if hot water at a high temperature is required, the discharge pipe 42 may be connected to the water supply pipe 39 on the downstream side of the water supply heater 25.

Further, the steam equivalent to the steam generated in the steam generator 10 and the combustor 30 may be removed not only as condensate but also as steam. In this case, steam corresponding to the steam generated in the steam generator 10 and the combustor 30 may be removed from the high-pressure turbine 21 and the low-pressure turbine 22 as extracted air, for example. The removed steam is supplied to, for example, external steam utilization equipment that utilizes steam.

Note that for hot water utilization equipment and steam utilization equipment, for example, supply of water in an amount exceeding the amount of water condensed from the steam generated in the steam generator 10 and the combustor 30, or It is also possible to supply an amount of steam that exceeds the amount of steam that has been supplied. In this case, water corresponding to the excess supply water and steam discharged to the outside is supplied to the condenser 23, for example.

Next, the operation of the steam turbine power generation equipment 1 will be explained.

In the steam generator 10, oxygen and hydrogen are combusted to generate water vapor (steam). Further, the feed water supplied from the feed water supply section 13 evaporates into steam due to reaction heat due to combustion. Steam generated by the steam generator 10 is introduced into the high pressure turbine 21 via the main steam pipe 35. That is, the entire amount of water vapor, which is a combustion gas produced by the combustion of oxygen and hydrogen, is introduced into the high-pressure turbine 21 along with the generated steam.

The steam introduced into the high-pressure turbine 21 is discharged into the steam pipe 36 after rotating the high-pressure turbine 21 . A part of the steam discharged into the steam pipe 36 is introduced into the low-pressure turbine 22 as a cooling medium via a cooling medium supply pipe 37. The remainder of the steam discharged into the steam pipe 36 is introduced into the combustor 30.

In the combustor 30, water vapor is generated by combustion of hydrogen and oxygen. The steam introduced into the combustor 30 is reheated by mixing with the steam generated in the combustor 30, and then introduced into the low pressure turbine 22. That is, the steam generated by combustion and the introduced steam are introduced into the low pressure turbine 22.

Here, the flow rate of steam introduced into the low-pressure turbine 22 increases by the flow rate of steam generated in the combustor 30. Furthermore, the temperature of the steam discharged from the high-pressure turbine 21 increases as it is mixed with high-temperature steam generated in the combustor 30. The temperature and flow rate of steam introduced into the low-pressure turbine 22 are adjusted by adjusting the combustion conditions of the combustor 30.

By increasing the temperature of the steam introduced into the low pressure turbine 22 and further increasing the flow rate of the steam introduced into the low pressure turbine 22, the thermal efficiency and output in the low pressure turbine 22 are increased. That is, by including the combustor 30, thermal efficiency and output increase.

The steam introduced into the low pressure turbine 22 is discharged into the exhaust pipe 38 after rotating the low pressure turbine 22 . The steam discharged into the exhaust pipe 38 is introduced into the condenser 23 and condensed to become condensed water. Note that the generator 50 is driven by the rotation of the high-pressure turbine 21 and the low-pressure turbine 22 to generate electricity.

The condensate of the condenser 23 is pumped as water supply by the water supply pump 24 and guided to the water supply section 13 of the steam generator 10 via the water supply pipe 39. At this time, the feed water flowing through the water supply pipe 39 is heated by the extracted air from the low pressure turbine 22 in the feed water heater 25 .

As described above, according to the steam turbine power generation equipment 1 of the first embodiment, by including the steam generator 10 that generates steam using the reaction heat generated by the combustion of oxygen and hydrogen, the combustion generated by combustion Gas (steam) and steam generated by reaction heat can be introduced into the high-pressure turbine 21 . Thereby, exhaust heat from the steam generator 10 is utilized in the high pressure turbine 21. Therefore, heat loss due to exhaust heat from the steam generator 10 does not occur.

By providing the combustor 30 that burns hydrogen and oxygen, it is possible to generate steam and reheat the steam exhausted from the high-pressure turbine 21. Therefore, the temperature of the steam introduced into the low pressure turbine 22 is higher than the temperature of the steam exhausted from the high pressure turbine 21. This improves the thermal efficiency of the thermal cycle.

Further, the flow rate of steam introduced into the low-pressure turbine 22 increases by the amount of steam generated in the combustor 30. Therefore, the turbine output increases.

Since the steam turbine power generation equipment 1 uses reaction heat generated by combustion of oxygen and hydrogen as a heat source, greenhouse gases such as carbon dioxide (CO ₂ ) and nitrogen oxides (NO _x ) are not emitted. Therefore, carbon neutrality can be achieved. Furthermore, since the steam turbine power generation equipment 1 does not emit environmental emissions such as greenhouse gases, air pollutants, and water pollutants, a zero-emission steam turbine power generation equipment can be realized.

(Other forms in the first embodiment)
2 and 3 are system diagrams schematically showing other forms of the steam turbine power generation equipment 1 of the first embodiment. FIGS. 2 and 3 show an example in which a plurality of feed water heaters are provided.

As shown in FIG. 2, a feed water heater 26 may be provided in the water supply pipe 39 downstream of the feed water heater 25. Bleed air from the low-pressure turbine 22 is introduced into the feed water heater 26 via the air bleed pipe 40a. In this case, the air bleed pipe 40a bleeds air from the turbine stage upstream of the air bleed pipe 40. Therefore, the bleed air introduced by the bleed pipe 40a has a higher temperature and pressure than the bleed air introduced by the bleed pipe 40.

The bleed air that has heated the feed water in the feed water heater 26 is introduced into the feed water heater 25, for example, via the discharge pipe 41a. This configuration is suitable when the temperature of the bleed air discharged from the feed water heater 26 is higher than the temperature of the bleed air introduced via the bleed air pipe 40. Thereby, the bleed air discharged from the feed water heater 26 can be effectively utilized.

As shown in FIG. 3, a feed water heater 27 may be provided in the water supply pipe 39 downstream of the feed water heater 25. Bleed air from the high-pressure turbine 21 is introduced into the feed water heater 27 via the air bleed pipe 40b. Therefore, the bleed air introduced by the bleed pipe 40b has a higher temperature and pressure than the bleed air introduced by the bleed pipe 40.

The bleed air that heated the feed water in the feed water heater 27 is introduced into the feed water heater 25, for example, via the discharge pipe 41b. This configuration is suitable when the temperature of the bleed air discharged from the feed water heater 27 is higher than the temperature of the bleed air introduced via the bleed air pipe 40. Thereby, the bleed air discharged from the feed water heater 27 can be used effectively.

By providing a plurality of feed water heaters 25, 26, and 27 as shown in FIGS. 2 and 3, the temperature of the feed water increases and the thermal efficiency of the heat cycle improves.

FIG. 4 is a system diagram schematically showing another form of the steam turbine power generation equipment 1 of the first embodiment. As shown in FIG. 4, the other embodiment of the steam turbine power generation equipment 1 does not include a cooling medium supply pipe 37 that introduces a part of the steam discharged from the high pressure turbine 21 into the low pressure turbine 22 as a cooling medium.

For example, if the temperature of the steam introduced from the combustor 30 to the low-pressure turbine 22 is lower than the allowable temperature limit of the constituent members in the low-pressure turbine 22, the steam turbine power generation equipment can be configured without introducing a cooling medium to the low-pressure turbine 22. can.

These other forms of the steam turbine power generation equipment 1 also provide the same effects as the steam turbine power generation equipment 1 shown in FIG. 1 in addition to the effects of the other forms.

Note that in other embodiments of the steam turbine power generation equipment 1, a configuration in which the bleed air pipe 40 is not provided with the temperature reducing section 110 has been described as an example; however, depending on the air bleed conditions, as shown in FIG. A warm section 110 may also be provided. Further, the temperature reducing section 110 is not limited to the air bleed pipe 40, but may be provided to the air bleed pipes 40a and 40b. Further, in the following embodiments as well, depending on the bleed conditions, a configuration in which the bleed pipe is provided with a temperature reducing section 110 may be adopted. In addition, when the temperature reducing part 110 is provided, the configuration of the water supply outlet pipe 111 and the water supply introduction pipe 112 is also provided.

(Second embodiment)
FIG. 5 is a system diagram schematically showing the configuration of the steam turbine power generation equipment 2 according to the second embodiment. In addition, in the following embodiment, the same code|symbol is attached|subjected to the same component as the steam turbine power generation equipment 1 of 1st Embodiment, and the overlapping description is omitted or simplified.

The steam turbine power generation equipment 2 of the second embodiment has a configuration in which feed water is heated by steam discharged from the low-pressure turbine 22. The other configurations are the same as the configuration of the steam turbine power generation equipment 1 of the first embodiment. Therefore, here, the configuration that is different from the configuration of the steam turbine power generation equipment 1 of the first embodiment will be mainly explained.

The steam turbine power generation equipment 2 includes an exhaust pipe heat exchange section 60 that heats feed water with steam discharged from the low-pressure turbine 22. As shown in FIG. 5, the exhaust pipe heat exchange section 60 is provided in the exhaust pipe 38.

A water supply pipe 39 that supplies water from the condenser 23 to the steam generator 10 is provided via an exhaust pipe heat exchange section 60. For example, as shown in FIG. 5, the water supply pipe 39 is configured to pass through an exhaust pipe heat exchange section 60 between the water supply pump 24 and the water supply heater 25. That is, the feed water is heated in the exhaust pipe heat exchange section 60 upstream of the feed water heater 25.

Note that the discharge pipe 42 is connected to, for example, a water supply pipe 39 between the water supply pump 24 and the exhaust pipe heat exchange section 60. Further, the method of discharging water and steam equivalent to the steam generated in the steam generator 10 and the combustor 30 to the outside, and the means of utilizing the water and steam discharged to the outside are not explained in the first embodiment. It is as described in the form.

The supply water flowing through the water supply pipe 39 flows into the exhaust pipe heat exchange section 60 and exchanges heat with the steam flowing through the exhaust pipe 38 . Due to this heat exchange, the feed water is heated by the steam. On the other hand, the steam discharged from the low-pressure turbine 22 passes through the exhaust pipe heat exchange section 60 and radiates heat to the water supply. Then, the temperature of the steam decreases, for example, to a set temperature at which it is introduced into the condenser 23.

Here, in the configuration in which the feed water heater 25 is provided downstream of the exhaust pipe heat exchange section 60 in the water supply pipe 39, for example, the temperature of the feed water heated in the exhaust pipe heat exchange section 60 is introduced into the feed water heater 25. This applies when the temperature is lower than the bleed air temperature.

Here, as shown in FIG. 5, the water supply pipe 39 may be provided with a bypass pipe 45 that bypasses the exhaust pipe heat exchange section 60. That is, the bypass pipe 45 is provided so as not to pass through the exhaust pipe heat exchange section 60. The bypass pipe 45 is a pipe that connects the water supply pipe 39 between the water supply pump 24 and the exhaust pipe heat exchange section 60 and the water supply pipe 39 between the exhaust pipe heat exchange section 60 and the feed water heater 25. The feed water flowing through the bypass pipe 45 is introduced into the feed water heater 25 without passing through the exhaust pipe heat exchange section 60.

A flow rate regulating valve 46 is interposed in the bypass pipe 45 . By providing the bypass pipe 45, for example, the temperature of the steam introduced into the condenser 23 can be adjusted. Note that when the flow rate adjustment valve 46 is closed, the entire amount of feed water is introduced into the feed water heater 25 through the exhaust pipe heat exchange section 60.

Although not shown in the drawings, a check valve may be provided in the water supply pipe 39, for example, between the downstream connection part that is connected to the downstream end of the bypass pipe 45 and the exhaust pipe heat exchange part 60. This can prevent the water supply from flowing backward into the water supply pipe 39 from the downstream connection portion when the water supply flows through the bypass pipe 45 .

According to the steam turbine power generation equipment 2, when high-temperature steam is introduced from the combustor 30 to the low-pressure turbine 22, the temperature of the steam discharged from the low-pressure turbine 22 is lower than that of the low-pressure turbine when the combustor 30 is not provided, for example. may be higher than the temperature of the steam discharged from 22. In such a case, high temperature steam is introduced into the condenser 23, which reduces the thermal efficiency of the heat cycle.

Therefore, by providing the exhaust pipe heat exchange section 60, the temperature of the feed water can be raised by the steam discharged from the low-pressure turbine 22, and the temperature of the steam introduced into the condenser 23 can be lowered to an appropriate temperature. This improves the thermal efficiency of the thermal cycle.

In addition, in the steam turbine power generation equipment 2, in addition to the above-mentioned effects, the same effects as the steam turbine power generation equipment 1 of the first embodiment described above can be obtained.

(Other forms in the second embodiment)
FIG. 6 is a system diagram schematically showing another form of the steam turbine power generation equipment 2 of the second embodiment. Another form of the steam turbine power generation equipment 2 is shown in FIG. The configuration of the steam turbine power generation facility 2 is different from that of the steam turbine power generation facility 2 shown in FIG.

As shown in FIG. 6, other features of the steam turbine power generation equipment 2 include a water supply pipe 61 that leads the water supply from the water supply pipe 39 to the exhaust pipe heat exchange section 60, and a water supply pipe 61 that leads the supply water from the water supply pipe 39 to the exhaust pipe heat exchange section 60; and a water supply introduction pipe 62 that introduces the water into the water supply pipe 39.

One end of the water supply pipe 61 is connected to the water supply pipe 39 between the water supply pump 24 and the water supply heater 25 . The other end of the water supply outlet pipe 61 is connected to the exhaust pipe heat exchange section 60. A flow rate adjustment valve 61 a that adjusts the flow rate of the water supply introduced into the exhaust pipe heat exchange section 60 is interposed in the water supply outlet pipe 61 .

One end of the water supply inlet pipe 62 is connected to the water supply pipe 39 downstream of the position where the water supply outlet pipe 61 is connected. Here, one end of the feed water introduction pipe 62 is shown as an example connected to the water feed pipe 39 between the feed water heater 25 and the steam generator 10. The other end of the water supply pipe 62 is connected to the exhaust pipe heat exchange section 60 . Although not shown, a check valve may be provided in the water supply pipe 62. This can prevent the water supply from flowing backward from the water supply pipe 39 to the water supply introduction pipe 62.

Note that the discharge pipe 42 is connected, for example, to the water supply pipe 39 between the water supply pump 24 and the connecting portion of the water supply pipe 61 to the water supply pipe 39.

When the flow rate adjustment valve 61 a is open, a part of the water supply flowing through the water supply pipe 39 is led out to the water supply outlet pipe 61 and led to the exhaust pipe heat exchange section 60 . The feed water heated in the exhaust pipe heat exchange section 60 is introduced into the water supply pipe 39 again via the water supply introduction pipe 62. The remainder of the feed water is fed under pressure to the steam generator 10 via the feed water pipe 39 and through the feed water heater 25 . In this case, as described above, the temperature of the steam discharged from the low-pressure turbine 22 decreases to, for example, the set temperature at which it is introduced into the condenser 23.

Note that when the flow rate adjustment valve 61a is closed, the entire amount of the feed water is fed under pressure to the steam generator 10 through the feed water heater 25 via the water feed pipe 39.

Here, the configuration in which one end of the feed water introduction pipe 62 is connected to the water feed pipe 39 between the feed water heater 25 and the steam generator 10 is such that, for example, the temperature of the feed water heated in the exhaust pipe heat exchange section 60 is This is suitable when the temperature is higher than the temperature of the feed water heated by the feed water heater 25.

In other forms of this steam turbine power generation equipment 2, in addition to the effects of the other forms, the same effects as those of the steam turbine power generation equipment 2 described above can be obtained.

(Third embodiment)
FIG. 7 is a system diagram schematically showing the configuration of the steam turbine power generation equipment 3 according to the third embodiment. In the steam turbine power generation equipment 3 of the third embodiment, an intermediate pressure turbine 28 is provided between the high pressure turbine 21 and the low pressure turbine 22. Further, a configuration is provided in which the feed water is heated by the steam discharged from the intermediate pressure turbine 28. The other configurations are the same as the configuration of the steam turbine power generation equipment 1 of the first embodiment. Therefore, here, the configuration that is different from the configuration of the steam turbine power generation equipment 1 of the first embodiment will be mainly explained.

As shown in FIG. 7, the intermediate pressure turbine 28 is provided downstream of the high pressure turbine 21 in the flow direction of the steam flow. The high-pressure turbine 21, the intermediate-pressure turbine 28, the low-pressure turbine 22, and the generator 50 are arranged, for example, on the same axis, and are configured so that their respective rotors rotate integrally. Note that the intermediate pressure turbine 28 functions as a third steam turbine, and the low pressure turbine 22 functions as a fourth steam turbine.

A steam outlet of the high pressure turbine 21 is connected to a steam inlet of an intermediate pressure turbine 28 via a steam pipe 36. The combustor 30 is interposed in a steam pipe 36, for example. Note that the combustor 30 may be provided at the steam inlet portion of the intermediate pressure turbine 28.

Steam discharged from the combustor 30 is introduced into the steam inlet of the intermediate pressure turbine 28 via a steam pipe 36. Furthermore, a part of the steam discharged from the high-pressure turbine 21 is introduced into the intermediate-pressure turbine 28 as a cooling medium via a cooling medium supply pipe 37 . Note that the temperature of the cooling medium is lower than the temperature of the steam introduced from the combustor 30 to the intermediate pressure turbine 28. Further, the temperature of the cooling medium is set, for example, to a temperature that allows the constituent members of the intermediate pressure turbine 28 to be maintained at a temperature lower than the allowable temperature limit of the constituent members.

By introducing the cooling medium into the intermediate pressure turbine 28, the constituent members of the intermediate pressure turbine 28 can be cooled. Thereby, the temperature of the steam introduced from the combustor 30 can be increased.

A steam outlet of the intermediate pressure turbine 28 is connected to a steam inlet of the low pressure turbine 22 via a steam pipe 47. A steam outlet of the low pressure turbine 22 is connected to the condenser 23 via an exhaust pipe 38.

Bleed air from the intermediate pressure turbine 28 is introduced into the feed water heater 25 via an air bleed pipe 40c. The feed water flowing through the water supply pipe 39 is heated in the feed water heater 25 by extraction air from the intermediate pressure turbine 28 .

The steam turbine power generation equipment 3 includes a steam pipe heat exchange section 70 that heats feed water with steam discharged from the intermediate pressure turbine 28. As shown in FIG. 7, the steam pipe heat exchange section 70 is provided in the steam pipe 47.

A water supply pipe 39 that supplies water from the condenser 23 to the steam generator 10 is provided via a steam pipe heat exchange section 70. For example, as shown in FIG. 7, the water supply pipe 39 is configured to pass through a steam pipe heat exchange section 70 between the water supply pump 24 and the water supply heater 25. That is, the feed water is heated in the steam pipe heat exchange section 70 upstream of the feed water heater 25 .

Note that the discharge pipe 42 is connected to, for example, a water supply pipe 39 between the water supply pump 24 and the steam pipe heat exchange section 70. Further, the method of discharging water and steam equivalent to the steam generated in the steam generator 10 and the combustor 30 to the outside, and the means of utilizing the water and steam discharged to the outside are not explained in the first embodiment. It is as described in the form.

The feed water flowing through the water supply pipe 39 flows into the steam pipe heat exchange section 70 and exchanges heat with the steam flowing through the steam pipe 47 . Due to this heat exchange, the feed water is heated by the steam. On the other hand, the steam discharged from the intermediate pressure turbine 28 passes through the steam pipe heat exchange section 70 and radiates heat to the water supply. Then, the temperature of the steam decreases to, for example, a set temperature at which it is introduced into the low-pressure turbine 22.

Here, in the configuration in which the feed water heater 25 is provided downstream of the steam pipe heat exchange section 70 in the water supply pipe 39, for example, the temperature of the feed water heated in the steam pipe heat exchange section 70 is introduced into the feed water heater 25. This applies when the temperature is lower than the bleed air temperature.

Here, as shown in FIG. 7, the water supply pipe 39 may be provided with a bypass pipe 48 that bypasses the steam pipe heat exchange section 70. That is, the bypass pipe 48 is provided so as not to pass through the steam pipe heat exchange section 70. The bypass pipe 48 is a pipe that connects the water supply pipe 39 between the water supply pump 24 and the steam pipe heat exchange section 70 and the water supply pipe 39 between the steam pipe heat exchange section 70 and the feed water heater 25. The feed water flowing through the bypass pipe 48 is introduced into the feed water heater 25 without passing through the steam pipe heat exchange section 70.

A flow rate regulating valve 49 is interposed in the bypass pipe 48 . By providing the bypass pipe 48, the temperature of the steam introduced into the low pressure turbine 22 can be adjusted. Note that when the flow rate adjustment valve 49 is closed, the entire amount of feed water passes through the steam pipe heat exchange section 70 and is introduced into the feed water heater 25.

Although not shown in the drawings, a check valve may be provided in the water supply pipe 39, for example, between the downstream connection part that is connected to the downstream end of the bypass pipe 48 and the steam pipe heat exchange part 70. This can prevent the water supply from flowing backward into the water supply pipe 39 from the downstream connection portion when the water supply flows through the bypass pipe 48 .

According to the steam turbine power generation equipment 3, when high-temperature steam is introduced from the combustor 30 to the intermediate-pressure turbine 28, the temperature of the steam discharged from the intermediate-pressure turbine 28 is equal to the set temperature of the steam introduced into the low-pressure turbine 22. may exceed.

Therefore, by providing the steam pipe heat exchange section 70, the temperature of the feed water can be raised by the steam discharged from the intermediate pressure turbine 28, and the temperature of the steam introduced into the low pressure turbine 22 can be lowered to an appropriate temperature. Since the surplus amount of heat introduced into the low-pressure turbine 22 can be given to the water supply, the thermal efficiency of the heat cycle is improved.

In addition to the above-mentioned effects, the steam turbine power generation equipment 3 provides the same effects as the steam turbine power generation equipment 1 of the first embodiment described above.

(Other forms in the third embodiment)
FIG. 8 is a system diagram schematically showing another form of the steam turbine power generation equipment 3 according to the third embodiment. Another form of the steam turbine power generation equipment 3 is shown in FIG. The configuration of the steam turbine power generation facility 3 is different from that of the steam turbine power generation facility 3 shown in FIG.

As shown in FIG. 8, other forms of the steam turbine power generation equipment 3 include a water supply pipe 71 that leads the water supply from the water supply pipe 39 to the steam pipe heat exchange section 70, and a water supply pipe 71 that leads the supply water from the water supply pipe 39 to the steam pipe heat exchange section 70; and a water supply introduction pipe 72 for introducing the water into the water supply pipe 39.

One end of the water supply outlet pipe 71 is connected to the water supply pipe 39 between the water supply pump 24 and the water supply heater 25 . The other end of the water supply outlet pipe 71 is connected to the steam pipe heat exchange section 70 . A flow rate adjustment valve 71 a that adjusts the flow rate of the feed water introduced into the steam pipe heat exchange section 70 is interposed in the feed water outlet pipe 71 .

One end of the water supply inlet pipe 72 is connected to the water supply pipe 39 downstream of the position where the water supply outlet pipe 71 is connected. Here, an example is shown in which one end of the feed water introduction pipe 72 is connected to the water feed pipe 39 between the feed water heater 25 and the steam generator 10. The other end of the feed water introduction pipe 72 is connected to the steam pipe heat exchange section 70 . Although not shown, a check valve may be provided in the water supply pipe 72. This can prevent the water supply from flowing backward from the water supply pipe 39 to the water supply introduction pipe 72.

Note that the discharge pipe 42 is connected, for example, to the water supply pipe 39 between the water supply pump 24 and the connecting portion of the water supply pipe 71 to the water supply pipe 39.

When the flow rate adjustment valve 71a is open, a part of the feed water flowing through the water supply pipe 39 is led to the feed water outlet pipe 71 and guided to the steam pipe heat exchange section 70. The feed water heated in the steam tube heat exchange section 70 is introduced into the water supply pipe 39 again via the feed water introduction pipe 72. The remainder of the feed water is fed under pressure to the steam generator 10 via the feed water pipe 39 and through the feed water heater 25 . In this case, as described above, the temperature of the steam discharged from the intermediate pressure turbine 28 decreases to, for example, the set temperature at which it is introduced into the low pressure turbine 22.

Note that when the flow rate adjustment valve 71a is closed, the entire amount of the feed water is fed under pressure to the steam generator 10 through the feed water heater 25 via the water feed pipe 39.

Here, the configuration in which one end of the feed water introduction pipe 72 is connected to the water feed pipe 39 between the feed water heater 25 and the steam generator 10 is such that, for example, the temperature of the feed water heated in the steam pipe heat exchange section 70 is This is suitable when the temperature is higher than the temperature of the feed water heated by the feed water heater 25.

In other forms of this steam turbine power generation equipment 3, in addition to the effects of the other forms, the same effects as the above-described steam turbine power generation equipment 3 can be obtained.

(Fourth embodiment)
FIG. 9 is a system diagram schematically showing the configuration of the steam turbine power generation equipment 4 according to the fourth embodiment. In the steam turbine power generation equipment 4 of the fourth embodiment, a combustor 80 is provided at the steam inlet of the high-pressure turbine 21. Further, a part of the steam discharged from the steam generator 10 is introduced into the high-pressure turbine 21 as a cooling medium. The other configurations are the same as the configuration of the steam turbine power generation equipment 1 of the first embodiment. Therefore, here, the configuration that is different from the configuration of the steam turbine power generation equipment 1 of the first embodiment will be mainly explained.

The combustor 80 burns oxygen and hydrogen. The combustor 80 is provided at the steam inlet of the high-pressure turbine 21 . The combustor 30 includes a hydrogen supply section 81 that supplies hydrogen and an oxygen supply section 82 that supplies oxygen. In the combustor 80, water vapor is generated as combustion gas. Note that the combustor 80 functions as a second combustor.

Further, steam discharged from the steam generator 10 is introduced into the combustor 80 via the main steam pipe 35. The combustor 80 heats the introduced steam by the generated water vapor. Then, the steam generated in the combustor 80 is mixed with the introduced steam and supplied to the high-pressure turbine 21.

Note that the flow rates of oxygen and hydrogen supplied to the combustor 80 are adjusted as appropriate based on, for example, the temperature setting of the steam to be generated. The flow rates of oxygen and hydrogen are adjusted, for example, to a stoichiometric mixing ratio (equivalence ratio of 1).

A part of the steam discharged from the steam generator 10 is introduced into the high-pressure turbine 21 as a cooling medium via a cooling medium supply pipe 85. One end of the coolant supply pipe 85 is connected to the main steam pipe 35 between the steam generator 10 and the combustor 80, for example. The other end of the coolant supply pipe 85 is connected to a coolant inlet of the high-pressure turbine 21 .

Although not shown, the cooling medium supply pipe 85 is provided with a flow rate adjustment valve for adjusting the flow rate of the cooling medium introduced into the high-pressure turbine 21. The temperature of the cooling medium is lower than the temperature of the steam introduced from the combustor 80 to the high pressure turbine 21 . The temperature of the cooling medium is set, for example, to a temperature that can maintain the constituent members of the high-pressure turbine 21 at a temperature lower than the allowable temperature limit of the constituent members.

By introducing a cooling medium into the high-pressure turbine 21, the constituent members of the high-pressure turbine 21 can be cooled. Thereby, the temperature of the steam introduced from the combustor 80 can be increased.

By providing the combustor 80 that combusts hydrogen and oxygen in the steam turbine power generation equipment 4, it is possible to generate water vapor and heat the steam discharged from the steam generator 10. Therefore, the temperature of the steam introduced into the high-pressure turbine 21 is higher than the temperature of the steam discharged from the steam generator 10. This improves the thermal efficiency of the thermal cycle.

Further, the flow rate of steam introduced into the high-pressure turbine 21 increases by the amount of steam generated in the combustor 80. Therefore, the turbine output increases.

In addition to the above-mentioned effects, the steam turbine power generation equipment 4 provides the same effects as the steam turbine power generation equipment 1 of the first embodiment described above.

(Other forms in the fourth embodiment)
FIG. 10 is a system diagram schematically showing another form of the steam turbine power generation equipment 4 according to the fourth embodiment. As shown in FIG. 10, the other embodiment of the steam turbine power generation equipment 4 does not include a cooling medium supply pipe 85 that introduces a part of the steam discharged from the steam generator 10 into the high-pressure turbine 21 as a cooling medium. Furthermore, other forms of the steam turbine power generation equipment 4 do not include the cooling medium supply pipe 37 that introduces a part of the steam discharged from the high pressure turbine 21 into the low pressure turbine 22 as a cooling medium.

For example, if the temperature of the steam introduced from the combustor 80 to the high-pressure turbine 21 is lower than the heat-resistant temperature of the components in the high-pressure turbine 21, the steam turbine power generation equipment 4 can be operated without introducing a cooling medium to the high-pressure turbine 21. Can be configured.

In addition, if the temperature of the steam introduced from the combustor 30 to the low-pressure turbine 22 is, for example, lower than the heat-resistant temperature of the constituent members in the low-pressure turbine 22, the steam turbine power generation equipment can be installed without introducing a cooling medium into the low-pressure turbine 22. 4 can be configured.

Other forms of this steam turbine power generation equipment 4 can also provide the same effects as those of the steam turbine power generation equipment 4 described above.

(Fifth embodiment)
FIG. 11 is a system diagram schematically showing the configuration of the steam turbine power generation equipment 5 according to the fifth embodiment. A steam turbine power generation facility 5 according to the fifth embodiment has a configuration in which feed water is heated by steam discharged from a high pressure turbine 21, in addition to the configuration of the steam turbine power generation facility 4 according to the fourth embodiment shown in FIG. This is a configuration with the addition of Therefore, here, the configuration that is different from the configuration of the steam turbine power generation equipment 4 of the fourth embodiment will be mainly explained.

As shown in FIG. 11, the steam turbine power generation equipment 5 includes a steam pipe heat exchange section 90 that heats feed water with steam discharged from the high-pressure turbine 21. The steam pipe heat exchange section 90 is provided in the cooling medium supply pipe 37.

The steam turbine power generation equipment 5 includes a water supply pipe 91 that leads the water supply from the water supply pipe 39 to the steam pipe heat exchange section 90, and a water supply introduction pipe 92 that introduces the water heated in the steam pipe heat exchange section 90 into the water supply pipe 39. Equipped with.

One end of the water supply pipe 91 is connected to the water supply pipe 39 between the water supply pump 24 and the water supply heater 25 . The other end of the water supply outlet pipe 91 is connected to the steam pipe heat exchange section 90 . A flow rate adjustment valve 91 a that adjusts the flow rate of the feed water introduced into the steam pipe heat exchange section 90 is interposed in the feed water outlet pipe 91 .

One end of the water supply inlet pipe 92 is connected to the water supply pipe 39 downstream of the position where the water supply outlet pipe 91 is connected. Here, one end of the feed water introduction pipe 92 is shown as an example connected to the water feed pipe 39 between the feed water heater 25 and the steam generator 10. The other end of the feed water introduction pipe 92 is connected to the steam pipe heat exchange section 90. Although not shown, a check valve may be provided in the water supply pipe 92. This can prevent the water supply from flowing backward from the water supply pipe 39 to the water supply introduction pipe 92.

The discharge pipe 42 is connected, for example, to the water supply pipe 39 between the water supply pump 24 and the connection portion of the water supply pipe 91 with the water supply pipe 39. Further, a method of discharging water and steam corresponding to the steam generated in the steam generator 10, the combustor 80, and the combustor 30 to the outside, and a means of utilizing the water and steam discharged to the outside are as follows. This is as described in the first embodiment.

When the flow rate adjustment valve 91a is open, a part of the feed water flowing through the water supply pipe 39 is led out to the feed water outlet pipe 91 and guided to the steam pipe heat exchange section 90. The feed water heated in the steam tube heat exchange section 90 is introduced into the water feed pipe 39 again via the feed water introduction pipe 92. The remainder of the feed water is fed under pressure to the steam generator 10 via the feed water pipe 39 and through the feed water heater 25 . In this case, the steam discharged from the high-pressure turbine 21 and introduced into the cooling medium supply pipe 37 radiates heat to the water supply by passing through the steam pipe heat exchange section 90. The temperature of the steam is then lowered, for example, to a set temperature at which it is introduced into the low-pressure turbine as a cooling medium.

Note that when the flow rate adjustment valve 91a is closed, the entire amount of the feed water is fed under pressure to the steam generator 10 through the feed water heater 25 via the water feed pipe 39.

Here, the configuration in which one end of the feed water introduction pipe 92 is connected to the water feed pipe 39 between the feed water heater 25 and the steam generator 10 is such that, for example, the temperature of the feed water heated in the steam pipe heat exchange section 90 is This is suitable when the temperature is higher than the temperature of the feed water heated by the feed water heater 25.

According to the steam turbine power generation equipment 5, when high-temperature steam is introduced from the combustor 80 to the high-pressure turbine 21, the temperature of the steam discharged from the high-pressure turbine 21 increases to the low-pressure turbine 22 via the cooling medium supply pipe 37. The set temperature of the coolant introduced may be exceeded.

Therefore, by providing the steam pipe heat exchange section 90, the temperature of the feed water can be raised by the steam discharged from the high-pressure turbine 21, and the temperature of the cooling medium introduced into the low-pressure turbine 22 can be lowered to an appropriate temperature. Heating the feed water improves the thermal efficiency of the thermal cycle.

In addition, in the steam turbine power generation equipment 5, in addition to the above-mentioned effects, the same effects as the steam turbine power generation equipment 4 of the fourth embodiment described above can be obtained.

(Other forms in the fifth embodiment)
FIG. 12 is a system diagram schematically showing another form of the steam turbine power generation equipment 5 of the fifth embodiment. Another form of the steam turbine power generation equipment 5 is shown in FIG. The configuration of the steam turbine power generation equipment 5 is different from that shown in FIG.

As shown in FIG. 12, a water supply pipe 39 that supplies water from the condenser 23 to the steam generator 10 is provided via a steam pipe heat exchange section 90. For example, as shown in FIG. 12, the water supply pipe 39 is configured to pass through a steam pipe heat exchange section 90 between the water supply pump 24 and the water supply heater 25. That is, the feed water is heated in the steam pipe heat exchange section 90 upstream of the feed water heater 25. Note that the discharge pipe 42 is connected to, for example, a water supply pipe 39 between the water supply pump 24 and the steam pipe heat exchange section 90.

The water supply flowing through the water supply pipe 39 flows into the steam pipe heat exchange section 90 and exchanges heat with the steam flowing through the cooling medium supply pipe 37 . Due to this heat exchange, the feed water is heated by the steam. On the other hand, the temperature of the steam decreases, for example, to a set temperature at which it is introduced into the low-pressure turbine 22 as a cooling medium.

Here, in the configuration in which the feed water heater 25 is provided downstream of the steam pipe heat exchange section 90 in the water supply pipe 39, for example, the temperature of the feed water heated in the steam pipe heat exchange section 90 is introduced into the feed water heater 25. This applies when the temperature is lower than the bleed air temperature.

Here, as shown in FIG. 12, the water supply pipe 39 may be provided with a bypass pipe 95 that bypasses the steam pipe heat exchange section 90. That is, the bypass pipe 95 is provided so as not to pass through the steam pipe heat exchange section 90. The bypass pipe 95 is a pipe that connects the water supply pipe 39 between the water supply pump 24 and the steam pipe heat exchange section 90 and the water supply pipe 39 between the steam pipe heat exchange section 90 and the feed water heater 25. The feed water flowing through the bypass pipe 95 is introduced into the feed water heater 25 without passing through the steam pipe heat exchange section 90.

A flow rate regulating valve 96 is interposed in the bypass pipe 95 . By providing the bypass pipe 95, the temperature of the cooling medium introduced into the low pressure turbine 22 can be adjusted. Note that when the flow rate adjustment valve 96 is closed, the entire amount of feed water passes through the steam pipe heat exchange section 90 and is introduced into the feed water heater 25.

Although not shown in the drawings, a check valve may be provided in the water supply pipe 39, for example, between the downstream connection part that connects to the downstream end of the bypass pipe 95 and the steam pipe heat exchange part 90. This can prevent the water supply from flowing backward into the water supply pipe 39 from the downstream connection portion when the water supply flows through the bypass pipe 95 .

Here, in other embodiments of the steam turbine power generation equipment 5, an example has been shown in which the water supply pipe 39 passes through the steam pipe heat exchange section 90 between the feed water pump 24 and the feed water heater 25, but this configuration is not limited. I can't do it.

FIG. 13 is a system diagram schematically showing another form of the steam turbine power generation equipment 5 of the fifth embodiment. As shown in FIG. 13, the water supply pipe 39 may pass through a steam pipe heat exchange section 90 between the water supply heater 25 and the steam generator 10.

This configuration is suitable, for example, when the temperature of the feed water heated by the steam pipe heat exchange section 90 is higher than the temperature of the feed water heated by the feed water heater 25.

In other forms of the steam turbine power generation equipment 5 shown in FIGS. 12 and 13, in addition to the effects of the other forms, the same effects as those of the steam turbine power generation equipment 5 described above can be obtained.

(Sixth embodiment)
FIG. 14 is a system diagram schematically showing the configuration of the steam turbine power generation equipment 6 according to the sixth embodiment. The steam turbine power generation equipment 6 of the sixth embodiment has the configuration of the combustor 30 and the coolant supply pipe 37 removed from the configuration of the steam turbine power generation equipment 4 of the fourth embodiment shown in FIG. It is the composition.

As shown in FIG. 14, the steam turbine power generation equipment 6 includes a steam generator 10, a steam turbine system 20, and a generator 50 as main components. The steam turbine system 20 includes a high-pressure turbine 21 , a low-pressure turbine 22 , a combustor 80 , a condenser 23 , a feedwater pump 24 , and a feedwater heater 25 .

Note that the high-pressure turbine 21 functions as a first steam turbine, and the low-pressure turbine 22 functions as a second steam turbine. Combustor 80 functions as a first combustor.

The combustor 80 is provided at the steam inlet of the high-pressure turbine 21 . Note that the combustor 80 is as described in the fourth embodiment.

A part of the steam discharged from the steam generator 10 is introduced into the high-pressure turbine 21 as a cooling medium via a cooling medium supply pipe 85. The steam outlet of the high-pressure turbine 21 and the steam inlet of the low-pressure turbine 22 are connected by a steam pipe 36. Steam discharged from the high pressure turbine 21 is introduced into the low pressure turbine 22 via the steam pipe 36.

The effects of providing the combustor 80 that burns hydrogen and oxygen in the steam turbine power generation equipment 6 are as described in the fourth embodiment. Moreover, the effects of providing the steam generator 10 are as described in the first embodiment.

The steam turbine power generation equipment 6 also uses reaction heat generated by combustion of oxygen and hydrogen as a heat source, so greenhouse gases such as carbon dioxide (CO ₂ ) and nitrogen oxides (NO _x ) are not emitted. Therefore, carbon neutrality can be achieved. Furthermore, since the steam turbine power generation equipment 1 does not emit environmental emissions such as greenhouse gases, air pollutants, and water pollutants, a zero-emission steam turbine power generation equipment can be realized.

(Other forms in the sixth embodiment)
FIG. 15 is a system diagram schematically showing another form of the steam turbine power generation equipment 6 of the sixth embodiment. As shown in FIG. 15, the other embodiment of the steam turbine power generation equipment 6 does not include a cooling medium supply pipe 85 that introduces a part of the steam discharged from the steam generator 10 into the high-pressure turbine 21 as a cooling medium.

For example, if the temperature of the steam introduced from the combustor 80 to the high-pressure turbine 21 is lower than the allowable temperature limit of the components in the high-pressure turbine 21, the steam turbine power generation equipment can be configured without introducing a cooling medium to the high-pressure turbine 21. can.

Other forms of this steam turbine power generation equipment 6 can also provide the same effects as the steam turbine power generation equipment 6 described above.

(Seventh embodiment)
FIG. 16 is a system diagram schematically showing the configuration of the steam turbine power generation equipment 7 according to the seventh embodiment. A steam turbine power generation facility 7 according to the seventh embodiment has a configuration that heats feed water using steam discharged from a high pressure turbine 21, in addition to the configuration of the steam turbine power generation facility 6 according to the sixth embodiment shown in FIG. This is a configuration with the addition of Therefore, here, the configuration that is different from the configuration of the steam turbine power generation equipment 6 of the sixth embodiment will be mainly explained.

As shown in FIG. 16, the steam turbine power generation equipment 7 includes a steam pipe heat exchange section 100 that heats feed water with steam discharged from the high-pressure turbine 21. The steam pipe heat exchange section 100 is provided in the steam pipe 36.

The steam turbine power generation equipment 7 includes a water supply pipe 101 that leads water from the water supply pipe 39 to the steam pipe heat exchange section 100, and a water supply introduction pipe 102 that introduces the water heated in the steam pipe heat exchange section 100 into the water supply pipe 39. Equipped with.

One end of the water supply pipe 101 is connected to a water supply pipe 39 between the water supply pump 24 and the water supply heater 25 . The other end of the water supply pipe 101 is connected to the steam pipe heat exchange section 100. A flow rate adjustment valve 101a that adjusts the flow rate of the feed water introduced into the steam pipe heat exchange section 100 is interposed in the feed water outlet pipe 101.

One end of the water supply inlet pipe 102 is connected to a water supply pipe 39 downstream of the position where the water supply outlet pipe 101 is connected. Here, one end of the feed water introduction pipe 102 is shown as an example connected to the water feed pipe 39 between the feed water heater 25 and the steam generator 10. The other end of the feed water introduction pipe 102 is connected to the steam pipe heat exchange section 100. Although not shown, a check valve may be provided in the water supply pipe 102. This can prevent the water supply from flowing backward from the water supply pipe 39 to the water supply introduction pipe 102.

The discharge pipe 42 is connected, for example, to the water supply pipe 39 between the water supply pump 24 and the connecting portion of the water supply pipe 101 to the water supply pipe 39. Further, the method of discharging water and steam equivalent to the steam generated in the steam generator 10 and the combustor 80 to the outside, and the means of utilizing the water and steam discharged to the outside are not explained in the first embodiment. It is as described in the form.

When the flow rate adjustment valve 101a is open, a part of the feed water flowing through the water supply pipe 39 is led out to the feed water outlet pipe 101 and guided to the steam pipe heat exchange section 100. The feed water heated in the steam tube heat exchange section 100 is introduced into the water supply pipe 39 again via the water supply introduction pipe 102. The remainder of the feed water is fed under pressure to the steam generator 10 via the feed water pipe 39 and through the feed water heater 25 . In this case, the steam discharged from the high-pressure turbine 21 passes through the steam tube heat exchange section 100 to radiate heat to the water supply. Then, the temperature of the steam decreases to, for example, a set temperature at which it is introduced into the low-pressure turbine 22. The steam that has passed through the steam tube heat exchange section 100 is introduced into the low pressure turbine 22.

Note that when the flow rate adjustment valve 101a is closed, the entire amount of the feed water is sent under pressure to the steam generator 10 through the feed water heater 25 via the water feed pipe 39.

Here, the configuration in which one end of the feed water introduction pipe 102 is connected to the water feed pipe 39 between the feed water heater 25 and the steam generator 10 is such that, for example, the temperature of the feed water heated in the steam pipe heat exchange section 100 is This is suitable when the temperature is higher than the temperature of the feed water heated by the feed water heater 25.

According to the steam turbine power generation equipment 7, when high-temperature steam is introduced from the combustor 80 to the high-pressure turbine 21, the temperature of the steam discharged from the high-pressure turbine 21 is equal to the set temperature of the steam introduced to the low-pressure turbine 22. It may be exceeded.

Therefore, by providing the steam pipe heat exchange section 100, it is possible to raise the temperature of the water supply by the steam discharged from the high-pressure turbine 21, and to lower the temperature of the steam introduced into the low-pressure turbine 22 to an appropriate temperature. Since the surplus amount of heat introduced into the low-pressure turbine 22 can be given to the water supply, the thermal efficiency of the heat cycle is improved.

In addition to the above-mentioned effects, the steam turbine power generation equipment 7 provides the same effects as the steam turbine power generation equipment 6 of the sixth embodiment described above.

(Other forms in the seventh embodiment)
FIG. 17 is a system diagram schematically showing another form of the steam turbine power generation equipment 7 according to the seventh embodiment. Another form of the steam turbine power generation equipment 7 is shown in FIG. The configuration of the steam turbine power generation equipment 7 is different from that shown in FIG.

As shown in FIG. 17, a water supply pipe 39 that supplies water from the condenser 23 to the steam generator 10 is provided via a steam pipe heat exchange section 100. For example, as shown in FIG. 17, the water supply pipe 39 is configured to pass through a steam pipe heat exchange section 100 between the water supply pump 24 and the water supply heater 25. That is, the feed water is heated in the steam pipe heat exchange section 100 upstream of the feed water heater 25. Note that the discharge pipe 42 is connected to, for example, a water supply pipe 39 between the water supply pump 24 and the steam pipe heat exchange section 100.

The feed water flowing through the water supply pipe 39 flows into the steam pipe heat exchange section 100 and exchanges heat with the steam flowing through the steam pipe 36 . Due to this heat exchange, the feed water is heated by the steam. On the other hand, the temperature of the steam decreases, for example, to a set temperature at which it is introduced into the low-pressure turbine 22.

Here, in the configuration in which the feed water heater 25 is provided downstream of the steam pipe heat exchange section 100 in the water supply pipe 39, for example, the temperature of the feed water heated in the steam pipe heat exchange section 100 is introduced into the feed water heater 25. This applies when the temperature is lower than the bleed air temperature.

Here, as shown in FIG. 17, the water supply pipe 39 may be provided with a bypass pipe 105 that bypasses the steam pipe heat exchange section 100. That is, the bypass pipe 105 is provided so as not to pass through the steam pipe heat exchange section 100. The bypass pipe 105 is a pipe that connects the water supply pipe 39 between the water supply pump 24 and the steam pipe heat exchange section 100 and the water supply pipe 39 between the steam pipe heat exchange section 100 and the feed water heater 25. The feed water flowing through the bypass pipe 105 is introduced into the feed water heater 25 without passing through the steam pipe heat exchange section 100.

A flow rate regulating valve 106 is interposed in the bypass pipe 105 . By providing the bypass pipe 105, the temperature of the cooling medium introduced into the low pressure turbine 22 can be adjusted. Note that when the flow rate adjustment valve 106 is closed, the entire amount of feed water passes through the steam pipe heat exchange section 100 and is introduced into the feed water heater 25.

Although not shown in the drawings, a check valve may be provided in the water supply pipe 39, for example, between the downstream connecting portion connected to the downstream end of the bypass pipe 105 and the steam pipe heat exchange section 100. Thereby, when the water supply flows through the bypass pipe 105, it is possible to prevent the water supply from flowing backward into the water supply pipe 39 from the downstream connection portion.

Here, in other embodiments of the steam turbine power generation equipment 7, an example has been shown in which the water supply pipe 39 passes through the steam pipe heat exchange section 100 between the feed water pump 24 and the feed water heater 25, but this configuration is not limited. I can't do it.

FIG. 18 is a system diagram schematically showing another form of the steam turbine power generation equipment 7 according to the seventh embodiment. As shown in FIG. 18, the water supply pipe 39 may pass through a steam pipe heat exchange section 100 between the feed water heater 25 and the steam generator 10.

This configuration is suitable, for example, when the temperature of the feed water heated by the steam tube heat exchange section 100 is higher than the temperature of the feed water heated by the feed water heater 25.

In other forms of the steam turbine power generation equipment 7 shown in FIGS. 17 and 18, in addition to the effects of the other forms, the same effects as those of the steam turbine power generation equipment 7 described above can be obtained.

Here, from the steam turbine power generation equipment 2 of the second embodiment described above to the steam turbine power generation equipment 7 of the seventh embodiment, the steam turbine power generation equipment of the first embodiment shown in FIGS. 2 and 3 will be described. You may apply the structure provided with several feed water heaters 25, 26, and 27 of other forms in 1.

The effects of providing the plurality of feed water heaters 25, 26, and 27 in the steam turbine power generation equipment 2 of the second embodiment to the steam turbine power generation equipment 7 of the seventh embodiment are shown in FIGS. 2 and 3. This is the same effect as that obtained by providing the plurality of feed water heaters 25, 26, and 27 of other forms in the steam turbine power generation equipment 1 of the first embodiment.

According to the embodiments described above, by using oxyhydrogen combustion, it is possible to reduce heat loss and increase efficiency in the steam generator, and it is also possible to prevent emissions of greenhouse gases and the like.

Although several embodiments of the invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, substitutions, and changes can be made without departing from the gist of the invention. These embodiments and their modifications are included within the scope and gist of the invention, as well as within the scope of the invention described in the claims and its equivalents.

1, 2, 3, 4, 5, 6, 7...Steam turbine power generation equipment, 10...Steam generator, 11, 31, 81...Hydrogen supply section, 12, 32, 82...Oxygen supply section, 13...Water supply section , 20... Steam turbine system, 21... High pressure turbine, 22... Low pressure turbine, 23... Condenser, 24... Feed water pump, 25, 26, 27... Feed water heater, 28... Intermediate pressure turbine, 30, 80... Combustor , 35... Main steam pipe, 36, 47... Steam pipe, 37, 85... Cooling medium supply pipe, 38, 41, 41a, 42... Exhaust pipe, 39... Water supply pipe, 40, 40a, 40b, 40c... Air extraction pipe, 45, 48, 95, 105... bypass pipe, 46, 49, 61a, 71a, 91a, 96, 101a, 106... flow rate adjustment valve, 50... generator, 60... exhaust pipe heat exchange section, 61, 71, 91, 101, 111... Water supply outlet pipe, 62, 72, 92, 102, 112... Water supply introduction pipe, 70, 90, 100... Steam pipe heat exchange section, 110... Temperature reduction section.

Claims (10)

A steam generator that generates steam using reaction heat generated by combustion of oxygen and hydrogen;
a first steam turbine into which steam is introduced from the steam generator;
a first combustor into which steam discharged from the first steam turbine is introduced, and which burns oxygen and hydrogen to reheat the introduced steam;
a second steam turbine into which steam discharged from the first combustor is introduced;
A steam turbine power generation facility using oxyhydrogen combustion, comprising: a condenser that condenses steam discharged from the second steam turbine. 2. The steam turbine power generation equipment using oxyhydrogen combustion according to claim 1, wherein the second steam turbine introduces a part of the steam discharged from the first steam turbine as a cooling medium. Provided in an exhaust pipe that leads steam from the second steam turbine to the condenser, heating the feed water supplied from the condenser to the steam generator by the steam discharged from the second steam turbine. 3. The steam turbine power generation equipment using oxyhydrogen combustion according to claim 2, further comprising an exhaust pipe heat exchange section. The second steam turbine is configured with a third steam turbine and a fourth steam turbine into which steam having a lower pressure than the steam introduced into the third steam turbine is introduced,
Steam discharged from the first combustor is introduced into the third steam turbine,
A portion of the steam discharged from the first steam turbine is introduced into the third steam turbine as a cooling medium,
Steam discharged from the third steam turbine is introduced into the fourth steam turbine,
Steam discharged from the fourth steam turbine is introduced into the condenser,
The steam turbine power generation equipment is
The steam pipe is provided in a steam pipe that supplies steam from the third steam turbine to the fourth steam turbine, and is supplied from the condenser to the steam generator by the steam discharged from the third steam turbine. 3. The steam turbine power generation equipment using oxyhydrogen combustion according to claim 2, further comprising a steam pipe heat exchange section for heating feed water. Steam is introduced from the steam generator, and a second combustor is provided that heats the introduced steam by burning oxygen and hydrogen,
The steam turbine power generation equipment using oxyhydrogen combustion according to claim 1, wherein steam discharged from the second combustor is introduced into the first steam turbine. The first steam turbine introduces a part of the steam discharged from the steam generator as a cooling medium,
6. The steam turbine power generation equipment using oxyhydrogen combustion according to claim 5, wherein the second steam turbine introduces a part of the steam discharged from the first steam turbine as a cooling medium. A cooling medium supply pipe is provided to introduce a part of the steam discharged from the first steam turbine into the second steam turbine as a cooling medium, and the steam discharged from the first steam turbine is used to cool the steam turbine. 7. The steam turbine power generation equipment using oxyhydrogen combustion according to claim 6, further comprising a steam pipe heat exchange section that heats the feed water supplied from the water heater to the steam generator. A steam generator that generates steam using reaction heat generated by combustion of oxygen and hydrogen;
a first combustor into which steam is introduced from the steam generator and heats the introduced steam by burning oxygen and hydrogen;
a first steam turbine into which steam discharged from the first combustor is introduced;
a second steam turbine into which steam discharged from the first steam turbine is introduced;
A steam turbine power generation facility using oxyhydrogen combustion, comprising: a condenser that condenses steam discharged from the second steam turbine. 9. The steam turbine power generation equipment using oxyhydrogen combustion according to claim 8, wherein the first steam turbine introduces a part of the steam discharged from the steam generator as a cooling medium. The steam pipe is provided in a steam pipe that supplies steam from the first steam turbine to the second steam turbine, and is supplied from the condenser to the steam generator by the steam discharged from the first steam turbine. The steam turbine power generation equipment using oxyhydrogen combustion according to claim 9, further comprising a steam pipe heat exchange section for heating the feed water.

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