JP2006226293A - Gas turbine installation - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a gas turbine power generation system capable of attaining high output and high efficiency under a condition of reducing a supply water quantity, by reducing a design change in a gas turbine. <P>SOLUTION: A fine droplet sprayer 11 is arranged in an upstream side intake chamber 22 of an air compressor 2, and a humidifier 7 is arranged for humidifying high pressure air coming out of the compressor 2. A regenerator 5 is arranged for heating the humidified air with gas turbine exhaust gas as a heat source. Thus, there are the motive power reducing effect of the compressor 2 and the output increasing effect by humidification of combustion air 20, and since the quantity of fuel being used can be reduced by adopting a regenerating cycle, power generation efficiency is improved. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a gas turbine, and more particularly to a high humidity gas turbine cycle that utilizes high humidity air as combustion air.

Gas turbine combustion exhaust gas, etc. recovers thermal energy to generate steam, mixes the steam with the combustion air of the gas turbine, drives the turbine with the high-humidity combustion exhaust gas obtained in the combustor, and outputs and generates power Japanese Patent Application Laid-Open No. Sho 57- for high-humidity gas turbine cycle to improve efficiency
79224, JP-A-57-79225, JP-A-58-101228, USP 4,448,018 and the like.

  For these, a low-pressure compressor and a high-pressure compressor are installed in series as a compressor, a direct or indirect heat exchanger is installed between the two compressors, and water is injected into the compressed air that has passed through the high-pressure compressor. Thus, a configuration for recovering heat is disclosed.

  However, in any known example, in order to obtain a desired output or efficiency, it is necessary to inject a large amount of water into the compressed air entering the combustor.

  When air containing a large amount of water is supplied to the combustor, the combustion stability of the combustor decreases. In particular, in a gas turbine for power generation, there is a great influence when premixed combustion of air and fuel having a narrow stable combustion range is performed in order to achieve low Nox of exhaust gas.

  Then, this invention is providing the high-humidity gas turbine installation with high combustion stability, obtaining desired output and efficiency.

  The present invention provides a high-humidity gas turbine facility with high combustion stability while reducing the amount of water injection required to obtain a desired output and efficiency to obtain a desired output and efficiency.

  Also, by reducing the amount of water injected, downsizing the humidifier and the water recovery device from the gas turbine exhaust gas, reducing the loss of compressed air and exhaust gas, and further increasing the efficiency and output of the high humidity gas turbine. provide.

  In a high-humidity gas turbine cycle, a large amount of moisture is added to the combustion air. However, if the same moisture is added to the humidified air, the humidifier can be made smaller than the method of adding moisture to the pressurized air. The heat exchanger that supplies hot water can also be made smaller.

  As a result, the pressure loss of the equipment connected between the air compressor such as the humidifier and the heat exchanger and the gas turbine is reduced, so that the power generation efficiency of the gas turbine can be improved. Further, the compressor power can be reduced without dividing the air compressor or providing a plurality of stages in series, and the output and efficiency of the gas turbine can be improved.

Specifically, the present invention relates to a compressor that compresses and discharges supplied air, a combustor in which air and fuel discharged from the compressor are combusted, a turbine driven by combustion gas of the combustor, and A gas turbine facility comprising:
Installed in the intake chamber upstream of the compressor, sprays water on the air supplied to the compressor to lower the temperature of the air entering the compressor from the outside air temperature, and together with the air that has lowered this temperature A spraying device configured to vaporize the sprayed liquid droplets introduced into the compressor while flowing down the compressor;
A water adding device for adding water to the compressed air discharged from the compressor containing water sprayed by the spraying device;
A regenerator that is supplied with compressed air containing moisture added by the water adding device and is heated using the gas turbine exhaust gas as a heat source;
A path through which compressed air heated by the regenerator is supplied to the combustor.

  As a result, high-power and high-efficiency operation can be performed while suppressing the amount of injected water supplied to the combustor.

Alternatively, a gas turbine comprising: a compressor that compresses and discharges supplied air; a combustor that combusts air and fuel discharged from the compressor; and a turbine that is driven by the combustion gas of the combustor. Equipment,
Installed in the intake chamber upstream of the compressor, sprays water on the air supplied to the compressor and vaporizes some of the sprayed droplets before being introduced into the compressor. A spraying device configured to vaporize the unvaporized droplets introduced into the compressor together with the air while flowing down in the compressor;
A water adding device for adding water to the compressed air discharged from the compressor containing water sprayed by the spraying device;
A regenerator that is supplied with compressed air containing moisture added by the water adding device and is heated using the gas turbine exhaust gas as a heat source;
A path through which compressed air heated by the regenerator is supplied to the combustor.

Alternatively, a gas turbine comprising: a compressor that compresses and discharges supplied air; a combustor that combusts air and fuel discharged from the compressor; and a turbine that is driven by the combustion gas of the combustor. Equipment,
Installed in the intake chamber upstream of the compressor, sprays water on the air supplied to the compressor and vaporizes some of the sprayed droplets before being introduced into the compressor. A spraying device configured to vaporize the unvaporized droplets introduced into the compressor together with the air while flowing down in the compressor;
A water adding device for adding water to the compressed air discharged from the compressor containing water sprayed by the spraying device;
A regenerator that is supplied with compressed air containing moisture added by the water adding device and is heated using the gas turbine exhaust gas as a heat source;
A path through which compressed air heated by the regenerator is supplied to the combustor;
It has a path for recovering moisture in the exhaust gas from the combustion exhaust gas that has passed through the regenerator and supplying the recovered water to at least one of the spraying device and the water adding device.

  Thereby, the quantity of makeup water can be decreased. Moreover, since the recovered water containing the heat of the exhaust gas can be used again and the heat generated by itself can be returned to the upstream side of the combustor, the efficiency of the gas turbine can be further improved. In addition, when the temperature of recovered water is raised using compressed air or gas turbine exhaust gas as a heat source and water is injected into the compressed air, the temperature raising equipment can be reduced in size and pressure loss can be further reduced. be able to.

Or the gas turbine equipment,
The spray device includes a plurality of spray devices installed along the air flow in the intake chamber, and the temperature of water ejected from a spray device located downstream from the water ejected from the spray device located upstream. Is preferably set to be high.

  As a result, the weight flow rate at the compressor inlet can be increased, and droplets that can be easily evaporated in the compressor can be supplied from the compressor inlet, so that the amount of evaporation in the compressor can be increased stably.

  Specifically, the intake air is cooled by the water spray device in the previous stage to increase the air weight flow rate. In addition, by spraying high temperature water from a subsequent water spraying device installed near the inlet of the compressor, a large amount of water that easily evaporates in the compressor can be included in the air entering the compressor.

  For this reason, it is possible to further improve the output and increase the efficiency by increasing the ratio of the amount of water supplied from the spray device to the air to the amount of water supplied from the water injection device.

Or the gas turbine equipment,
It is preferable to provide a control device that controls the amount of water sprayed from the spraying device relative to the amount of water added from the water adding device to be in the range of 1/50 to 1/5.

  In addition, the range is preferably in the range of 1/25 to 1/10.

Or the gas turbine equipment,
A controller that controls the amount of water sprayed from the spraying device relative to the amount of water added from the water adding device to be in the range of 1/50 to 1/5,
It is preferable that the proportion of water circulated in the water adding device is controlled to be 70% to 95% of the amount of water added to the water adding device. Moreover, it is desirably in the range of 1/25 to 1/10.

Or the gas turbine equipment,
The amount of water sprayed from the spraying device is in the range of 0.2% to 5.0% with respect to the air weight flow rate, and the amount of water added from the water adding device is 30% or less with respect to the compressor discharge weight flow rate. It is preferable to be controlled.

  Desirably, the amount of water sprayed is in the range of 0.4% to 2.5%.

Alternatively, a gas turbine comprising: a compressor that compresses and discharges supplied air; a combustor that combusts air and fuel discharged from the compressor; and a turbine that is driven by the combustion gas of the combustor. Equipment,
Installed in the intake chamber upstream of the compressor, sprays water on the air supplied to the compressor and vaporizes some of the sprayed droplets before being introduced into the compressor. A spraying device configured to vaporize the unvaporized droplets introduced into the compressor together with the air while flowing down in the compressor;
A water adding device for adding water to the compressed air discharged from the compressor containing water sprayed by the spraying device;
A regenerator that is supplied with compressed air containing moisture added by the water adding device and is heated using the gas turbine exhaust gas as a heat source;
A path through which compressed air heated by the regenerator is supplied to the combustor, and a control device that is controlled so that the water temperature supplied to the water injection device is higher than the ice temperature supplied to the spray device; It is characterized by providing.

  The control device can use, for example, a makeup water supply device capable of supplying water at a plurality of temperature levels or a water recovery device from exhaust gas.

Alternatively, a gas turbine comprising: a compressor that compresses and discharges supplied air; a combustor that combusts air and fuel discharged from the compressor; and a turbine that is driven by the combustion gas of the combustor. Equipment,
Installed in the intake chamber upstream of the compressor, sprays water on the air supplied to the compressor and vaporizes some of the sprayed droplets before being introduced into the compressor. A spraying device configured to vaporize the unvaporized droplets introduced into the compressor together with the air while flowing down in the compressor;
A water adding device for adding water to the compressed air discharged from the compressor containing water sprayed by the spraying device;
A regenerator that is supplied with compressed air containing moisture added by the water adding device and is heated using the gas turbine exhaust gas as a heat source;
A path through which compressed air heated by the regenerator is supplied to the combustor, moisture in the exhaust gas is recovered from the combustion exhaust gas that has passed through the regenerator, and the recovered water is supplied to the spray device and the water injection device Water supply route to
And a cooling device that cools the compressed air flowing upstream of the water injection device by heat exchange with water supplied to the water adding device.

Or the gas turbine equipment,
Instead of the water supply path,
A water supply path for recovering water in the exhaust gas from the combustion exhaust gas passed through the regenerator, and supplying the recovered water to the water adding device;
It is preferable to include a spray water supply path that guides the spray water supplied from outside the system to the spray device.

Alternatively, a gas turbine comprising: a compressor that compresses and discharges supplied air; a combustor that combusts air and fuel discharged from the compressor; and a turbine that is driven by the combustion gas of the combustor. Equipment,
Installed in the intake chamber upstream of the compressor, sprays water on the air supplied to the compressor and vaporizes some of the sprayed droplets before being introduced into the compressor. A spraying device configured to vaporize the unvaporized droplets introduced into the compressor together with the air while flowing down in the compressor;
A water adding device for adding water to the compressed air discharged from the compressor containing water sprayed by the spraying device;
A regenerator that is supplied with compressed air containing moisture added by the water adding device and is heated using the gas turbine exhaust gas as a heat source;
The combustor supplied with compressed air heated by the regenerator;
A water supply path for recovering moisture in the exhaust gas from the combustion exhaust gas that has passed through the regenerator, and supplying the recovered water to the spraying device and the water adding device;
A feed water heater that heats up the water supplied to the water adding device using the combustion exhaust gas that has passed through the regenerator as a heat source.

  Alternatively, the gas turbine equipment preferably includes a control device that controls to reduce the amount of water sprayed by the spraying device after reducing the amount of water added to the compressed air by the water adding device when the load drops. Alternatively, it is preferable to include a control device that controls the amount of water added to the compressed air by the water adding device after increasing the amount of water sprayed by the spray device when the load increases.

Alternatively, a gas turbine comprising: a compressor that compresses and discharges supplied air; a combustor that combusts air and fuel discharged from the compressor; and a turbine that is driven by the combustion gas of the combustor. An efficiency increasing device that recovers thermal energy of gas turbine exhaust gas installed in equipment and improves power generation efficiency,
Installed in the intake chamber upstream of the compressor, sprays water on the air supplied to the compressor and vaporizes some of the sprayed droplets before being introduced into the compressor. A spraying device configured to vaporize the unvaporized droplets introduced into the compressor together with the air while flowing down in the compressor;
A water adding device for adding water to the compressed air discharged from the compressor containing water sprayed by the spraying device;
And a regenerator that is supplied with compressed air containing moisture added by the water adding device and is heated using the gas turbine exhaust gas as a heat source.

Alternatively, a gas turbine comprising: a compressor that compresses and discharges supplied air; a combustor that combusts air and fuel discharged from the compressor; and a turbine that is driven by the combustion gas of the combustor. An efficiency increasing device that recovers thermal energy of gas turbine exhaust gas installed in equipment and improves power generation efficiency,
Installed in the intake chamber upstream of the compressor, sprays water on the air supplied to the compressor and vaporizes some of the sprayed droplets before being introduced into the compressor. A spraying device configured to vaporize the unvaporized liquid droplets introduced into the compressor together with the air while flowing down the compressor, and discharged from the compressor containing water sprayed by the spraying device. A water adding device for adding water to the compressed air,
A regenerator that is supplied with compressed air containing moisture added by the water adding device and is heated using the gas turbine exhaust gas as a heat source;
It has a path for recovering moisture in the exhaust gas from the combustion exhaust gas that has passed through the regenerator, and supplying the recovered water to the spray device and at least the water adding device of the water adding device.

  Or it is the said efficiency increasing apparatus, Comprising: It is preferable to provide the control apparatus controlled so that the amount of water sprayed from the said spraying apparatus with respect to the amount of water added from the said water adding apparatus may be set to the range of 1/50-1/5. More preferably, the range is 1/25 to 1/10.

  According to the present invention, it is possible to provide a high-humidity gas turbine facility with high combustion stability while obtaining desired output and efficiency.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a system diagram of a gas turbine cycle showing a first embodiment. As shown in FIG. 1, a gas turbine power generation facility includes a compressor 2 that compresses and discharges air, a combustor 4 that is supplied with air compressed by the compressor, and a gas turbine that is driven by combustion exhaust gas from the combustor. 1. A generator 3 connected to the gas turbine 1 via a shaft is provided. The generator 3 is connected to a power transmission system (not shown). Further, the pump and the like are not shown.

  The compressor 2 is connected to an intake chamber 22 that takes in intake air supplied to the compressor 2. For example, an intake filter chamber 21 in which a filter 23 is installed is disposed at the tip of the intake chamber. A louver 24 is disposed in the upstream portion of the intake filter chamber 21.

  The intake spray device 11 installed in the intake chamber includes a spray device that sprays fine droplets. For example, a spray nozzle described in JP-A-9-236024 can be used. The Zautor average particle diameter (S.M.D) of the water droplets ejected is about 10 μm. In the present embodiment, the intake spray device 11 is installed in the intake chamber 22 spaced from the inlet of the compressor, for example, the first stage stationary blade. In this figure, it is installed downstream of the intake filter 23 in the filter chamber 21.

  A route for supplying water to be sprayed communicates with the intake spray device 11. Water sprayed from the makeup water supply device 15 is supplied to the path.

  In the path where the compressed air discharged from the compressor 2 reaches the combustor 4, a water adding device for ejecting water droplets and adding moisture to the compressed air is installed. For example, a humidifier 7 is installed. The compressed air that has passed through the humidifier 7 is guided, and the regenerator 5 that heats the compressed air using the gas turbine exhaust gas as a heat source is installed. The compressed air heated by the regenerator 5 is supplied to the combustor 4.

  The humidifier 7 has a path for supplying water to be supplied to the compressed air to be guided. Water injected from the makeup water supply device 15 is supplied to the path. Moreover, it is preferable to provide the path | route which circulates so that the water collect | recovered among the injected water may be again supplied to the humidifier 7 as injection water. The makeup water supply device 15 may be configured to guide water from outside the gas turbine equipment and related equipment, for example. Or the form which collects water from the system of this gas turbine equipment and related equipment may be sufficient. Alternatively, either the water supply spray device 11 or the humidifier 7 may use makeup water from outside the system, and the other may mainly use recovered water.

  Further, the humidifier 7 may use a method of spraying water droplets against the compressed air flow, a method of supplying water to a structure facing a flow path through which the compressed air flows, and contacting the compressed air flow. In the former case, when the same thing as the water supply spray device 11 is used, most of the water supplied and poured into the compressed air can be added to the compressed air. In the latter case, or in the former case, when using a device such as a general spray nozzle, most of the amount of water supplied to the compressed air is recovered as recovered water, and a part is added to the compressed air. Can do.

  In any method, it is preferable that the temperature of the water poured into the compressed air is high so that the water is easily evaporated.

  In addition, water supplied from the makeup water supply device 15 or recovered water after being injected into the compressed air by the humidifier 7 is supplied, and a water heater 6 for heat exchange using the exhaust gas of the gas turbine 1 as a heat source may be installed. preferable. The water supplied to the feed water heater 6 is once heated here and then supplied to the humidifier 7 as incoming water.

  Thereby, it becomes easy to evaporate with a humidifier. The water supplied to the feed water heater 6 is once heated here and then supplied to the humidifier 7 as incoming water.

  This is preferable because the installation of the feed water heater 6 can recover the heat energy that has conventionally been released into the atmosphere as exhaust gas, leading to an improvement in the output and efficiency of the gas turbine power generation system.

  Further, the post-cooler 13 is supplied with water supplied from the makeup water supply device 15 or recovered water after being injected into the compressed air with the humidifier 7 and exchanges heat using the compressed air guided to the humidifier 7 as a heat source. It is preferable to install. The water supplied to the post-cooler 13 is once heated here, and then supplied to the humidifier 7 as water injection.

  This is because the temperature of water supplied to the humidifier rises and evaporates easily by installing the post-cooler 13, and in addition to the advantage that the humidifier can be downsized in the case of the same humidification amount. Since the temperature of the air led to the humidifier is lowered, the temperature of the humidified air at the outlet of the humidifier can also be lowered, and the temperature range that can be recovered by the regenerator 5 that recovers heat from the gas turbine exhaust gas is widened. The thermal energy released into the atmosphere as exhaust gas can be recovered, which is preferable because it leads to an improvement in output and efficiency of the gas turbine power generation system.

  More preferably, both the feed water heater 6 and the post-cooler 13 are provided as in the embodiment of FIG.

  Each of the spraying device 11, the humidifying device 7, the post-cooler 13, the amount of water circulated to the post-cooler 13 or the feed water heater 6 after the recovered water is supplied to the compressed air by the humidifier A control device 18 that performs control including the amount of water is provided.

  The operation method of this system is as follows.

  The air 20 that has entered the intake filter chamber 21 from outside air is sprayed with the water droplets by the intake spray device 11, and then guided through the intake chamber 22 to the compressor 2 inlet. The compressor 2 is compressed to about 15 atm, for example, and discharged (for example, about 360 ° C.). The discharge pressure may be 20 atm or higher depending on the gas turbine. The compressed air discharged from the compressor 2 is reduced in temperature via the post-cooler 13 and guided to the humidifier 7. In the humidifier 7, the water that has been recovered by heat from the post-cooler 13 and the feed water heater 6 flows down from above, and the air cooled to about 100 ° C. through the post-cooler 13 moves downward. Flows in and flows upward, and the air and warm water directly contact each other in a counterflow, increasing the moisture in the air. The air leaving the humidifier 7 is saturated air (high humidity air) having a temperature of about 140 ° C. and a relative humidity of almost 100%, and flows into the regenerator 5. The high-humidity air flowing into the regenerator recovers thermal energy from the gas turbine exhaust gas and raises the temperature, and then is sent to the combustor 4. The fuel 50 is combusted by the combustor 4, and high-temperature combustion gas is sent to the gas turbine 1. The gas turbine 1 drives a generator 3. The combustion gas flowing through the gas turbine 1 becomes high-temperature exhaust gas and is released into the atmosphere via the regenerator 5 and the feed water heater 6.

  For example, the water supplied to the intake spray device 11 and the humidifier 7 is supplied from the makeup water supply device 15.

  Next, the effect of increasing the output and increasing the efficiency by this system configuration will be described.

  The air that has entered the intake chamber 22 and has been sprayed with droplets from the intake spray device 11 partially evaporates and cools the air, and then enters the compressor 2 inlet. When the air is cooled, the density increases, and the weight flow rate of the air flowing into the compressor increases, which has the effect of increasing the turbine output.

  Since air is compressed in the compressor and the temperature rises, unvaporized droplets in the air guided to the compressor 2 evaporate by taking latent heat of evaporation from the surrounding gas. Therefore, the air temperature at the compressor outlet can be kept low when there are droplets compared to when there are no droplets. The compression work of the air compressor is related to the temperatures of the inlet and the outlet, and the suppression of the air temperature rise corresponds to the reduction of the compression work of the compressor. In a gas turbine, for example, 50% or more of the output generated in the turbine is consumed as compressor power, and this ratio is further increased in a gas turbine having a high compression ratio. Therefore, a reduction in compressor work leads to an increase in gas turbine output.

  The droplets sprayed by the intake spray device 11 are vaporized while flowing down in the intake chamber and the compressor up to the compressor inlet, and become high-temperature (eg, about 360 ° C.) compressed air containing moisture. This air is once cooled by the post-cooler 13, becomes compressed air containing moisture at about 100 ° C., and is guided to the humidifier 7. Although the humidifier is installed for the purpose of increasing moisture in the air, the heat energy necessary for evaporating water in the humidifier is the heat recovered from the gas turbine exhaust gas via the feed water heater 6 or The heat stored in the compressed air itself is used. In order to improve the efficiency of the power generation system, it is desirable to effectively recover the heat as low as possible and reduce the heat discharged to the outside. By combining a post-cooler and a humidifier, low-temperature water can be obtained by the same principle as a so-called cooling tower that uses the phenomenon of losing latent heat and lowering the temperature when water evaporates. Heat can be recovered. As a result, the efficiency of the power generation system is improved.

  The high-humidity air that has flowed out of the humidifier 7 is, for example, saturated air having a temperature of about 140 ° C. and a relative humidity of 100%. The air is supplied to the regenerator 5 to recover the heat of the gas turbine exhaust gas, and the regenerator outlet Then, for example, it becomes high temperature air of about 550 ° C. and flows into the combustor. The combustor 4 burns fuel to obtain combustion gas at a predetermined temperature. However, since the combustion air is heated to a high temperature, the amount of fuel required is less than when no regenerator is used. That's it. Therefore, the use of the regenerator has a great effect on improving efficiency.

  Further, for example, in the case of a combustion temperature constant control operation or the like, if the air supplied to the combustor 4 has a lot of moisture, the oxygen concentration becomes small. According to the present embodiment, the amount of water to be supplied in order to obtain the same output or efficiency can be reduced as compared with the case where water is added to the pressurized air, so that the oxygen concentration of the air supplied to the combustor 4 can be increased. Furthermore, stable combustion can be achieved. In addition, the amount of fuel input required to produce the same output or efficiency can be reduced and higher efficiency can be achieved than when the intake spray device 11 is simply used.

  In the turbine 1, since a large amount of moisture is contained in the combustion gas, the flow rate is increased by the amount of the added moisture, and the effect of increasing the turbine output and steam having a larger specific heat than air is mixed. As a result, the specific heat of the gas mixture increases and the output increases due to the effect of increasing the work that can be taken out when the compressed gas mixture expands in the turbine.

  Thus, in this embodiment, stable combustion can be achieved while improving the power generation output and efficiency. For this reason, stable combustion can be achieved with high efficiency even at the time of partial load.

  Further, it is installed in the intake chamber 22 on the upstream side of the compressor 2, and water is sprayed on the air supplied to the compressor 2 to lower the temperature of the air entering the compressor 2 from the outside air temperature. A spraying device 11 configured to vaporize the sprayed droplets introduced into the compressor 2 together with the air whose temperature has been lowered while flowing down the compressor 2, and was sprayed by the spraying device 11. By providing the water injection device 7 for adding water to the compressed air discharged from the compressor 2 containing moisture, it is possible to operate with high output and high efficiency while suppressing the amount of injected water supplied to the combustor.

  Compared to the method of adding moisture to the air pressurized by the compressor, it has the feature that the same output and efficiency can be achieved with a small amount of water used.

  This operation will be described below.

  Next, in the system of the invention, the point that the amount of water can be reduced as compared with the prior art will be described.

  In the method of adding moisture to the compressed air (high humidity gas turbine system (for example, HAT system)), the humidifier increases the moisture in the combustion air, but the heat energy required to evaporate water in the humidifier is The heat recovered from the gas turbine exhaust gas via the feed water heater, the heat recovered by the intermediate cooling of the compressor, and the heat held by the compressed air itself are used. On the other hand, the system of the present invention does not use an intercooler as described above, so there is no heat corresponding to this. However, fine droplets are sprayed on the air supplied to the compressor and flow into the compressor. Before and after evaporating the droplets in the compressor, the combustion air is somewhat humidified before entering the humidifier.

FIG. 2 shows a system according to the present invention in which a low-pressure compressor and a high-pressure compressor are arranged in series to form a two-stage system, an intermediate cooler is provided, and water is added to humidified compressed air discharged from the high-pressure compressor. The ratio of the output of the system of the present invention to the system of the comparative example under the condition that the amount of water used is equal is shown. In the present invention, there are two methods of adding moisture, one that is performed before flowing into the compressor as intake spray, and one that is performed on the pressurized air after leaving the compressor (for example, using a humidifier). For this reason, the horizontal axis represents the ratio of the amount of water added before flowing into the compressor. The case where the amount of intake spray is 0 corresponds to the case where the entire amount is added to the humidifier.

  Moreover, the broken line has shown the case of the system which added water in the intercooler, and also added water to the compressed air discharged from the high pressure compressor. Therefore, the ratio is the amount of water injected in the intercooler / the total amount of makeup water.

  As a result of the evaluation, as the supply ratio from the intake spray device 11 was increased, the output increase ratio of the system of the present invention was larger than that of the comparative system.

  Therefore, if compared at the same output, the amount of water used in the present invention can be reduced as the intake spray ratio is increased. For this reason, according to the system of the present invention, more stable combustion can be obtained while obtaining high output or high efficiency, and the reliability as gas turbine equipment can be enhanced.

  The reason for this can be explained from the increase output mechanism of the intake spray as follows.

  When the intake air spray is applied to the compressor, the output of the gas turbine increases, which includes the following four effects.

  1) The effect that the intake air is cooled before it flows into the compressor, the density is increased, the weight flow rate of air flowing into the compressor is increased, and the turbine output is increased.

  2) The effect of reducing the compression work of the compressor by taking latent heat of vaporization from the surrounding gas when the droplets evaporate in the compressor and suppressing the temperature rise of the air that is compressed and rises in temperature.

  3) The effect of increasing the flow rate on the turbine side by the amount corresponding to the droplet evaporation amount and increasing the turbine output.

  4) The effect of increasing the specific heat of the mixed gas due to the mixing of water vapor having a larger specific heat than air and increasing the work that can be taken out when the compressed mixed gas expands in the turbine.

  In the present invention, the above effects 1) to 4) are produced, whereas in the comparative plant, the effects of 3) and 4) can be obtained by increasing the moisture, but the desired effects 1) and 2) are not. I can't get it.

  On the other hand, FIG. 2 also shows the evaluation results showing the ratio of the efficiency of the system of the present invention to the comparative system. As a result of the evaluation, as the intake spray ratio was increased, the efficiency improvement ratio of the system of the present invention was larger than that of the comparative system.

  Therefore, if the comparison is made with the same efficiency, it indicates that the amount of water used is smaller as the intake spray ratio is increased.

  In the gas turbine system in which the intake spray device 11 is simply installed in the compressor, the effect of increasing the output by reducing the compression work is great, but the air temperature at the compressor outlet decreases, that is, the temperature of the air flowing into the combustor decreases. Therefore, the amount of fuel used in the combustor increases and the efficiency is not greatly improved.

  Also, in a comparative system that supplies water to pressurized air, if the amount of water used is determined to a certain value, the output and efficiency are also determined to a certain value. For example, intermediate cooling is enhanced to improve output and efficiency. If it is going to be, the heat | fever collect | recovered by the intercooling is spent for increasing the humidification amount of a humidifier. That is, in order to improve output and efficiency, the amount of water must be increased.

  On the other hand, the temperature of the air that is installed in the intake chamber 22 on the upstream side of the compressor 2 and sprays water on the air supplied to the compressor 2 and enters the compressor 2 is changed to the outside air temperature. A spraying device 11 configured to vaporize the sprayed droplets introduced into the compressor 2 together with the air whose temperature has been lowered and the temperature of the spraying device 2 while flowing down in the compressor 2; 11, water is added to the compressed air discharged from the compressor 2 containing the water sprayed in 11, and the humidifier 7 and the compressed air containing the water added by the humidifier 7 are supplied, and the gas turbine exhaust gas is used as a heat source. In the present embodiment having the regenerator 5 to be heated, it is possible to reduce the compression work while suppressing the combustor inflow air temperature drop. In particular, the combustion air is heated by the action of the regenerator, and even when moisture is added to the air, the fuel consumption in the combustor is hardly increased, and the output can be increased. Have. In addition, in the case of supplying the same amount of water as that of the comparative system, in the present embodiment, by increasing the amount sprayed to the air by the intake spray device 11 with respect to the amount added to the air by the humidifier 7, compared to the comparative system. Output and efficiency can be improved without increasing the amount of water. In other words, in the case of the same output or efficiency, the embodiment of the present embodiment has a specific effect that the amount of water contained in the compressed air supplied to the combustor 4 can be reduced and combustion stability can be improved. Have.

  In addition, when installing an intercooler to reduce the power of the compressor, pressure loss and heat dissipation loss associated with the heat exchanger occur, but in the case of intake spray, these losses may be extremely small. It is considered effective in improving output and efficiency.

  Moreover, the water droplet sprayed from the intake spray device 11 has a particle size of 30 μm or less from the viewpoint of suppressing erosion of the blades. More preferably, it is 10 μm or less. The lower limit is considered to be about 1 μm in consideration of a technical viewpoint and energy necessary for producing a fine particle size.

  Moreover, when the silencer is arrange | positioned in the intake chamber 22, it is preferable to make the said intake spray device 11 located in the downstream of a silencer. For example, it can be arranged close to the downstream end of the silencer. Further, when a screen or the like is disposed, for example, it is preferable to install it on the downstream side of the screen from the viewpoint of sprayed water droplets adhering to the screen.

  The ratio of the amount of water sprayed from the intake spray device 11 to the amount of water added to the compressed air from the humidifier 7 is controlled in the range of 1/50 to 1/5, preferably 1/25 to 1/10. It is preferred that

  By setting it in this range, a more substantial effect can be obtained and stable combustion can be achieved. Moreover, it is good also from a viewpoint of stability of an apparatus. However, it is preferable to adjust the limit appropriately according to the device.

  Further, the temperature of the air that is installed in the intake chamber 22 on the upstream side of the compressor 2 and sprays water on the air supplied to the compressor 2 to enter the compressor 2 is lower than the outside air temperature. A spraying device 11 configured to vaporize the sprayed liquid droplets introduced into the compressor 2 together with the air reduced in the flow down the compressor 2 (most of the amount of spray water rides on the intake air, The water recovered is sprayed by the spraying device 11 by placing the structure facing the flow path through which the compressed air flows and flowing water through the structure. A humidifier 7 for bringing the compressed air discharged from the compressor 2 into contact with water and adding water to the compressed air (a part of the water is added to the air with respect to the amount of supplied water, and the other is recovered ) And the post-cooler 13 or the water supply By the arrangement to recover the heat in the heater 6, to ensure a sufficient quantity of heat recovered it can be operated with higher efficiency.

  In addition, the amount of water sprayed from the intake spray device 11 with respect to the amount of water added to the compressed air from the humidifier 7 is in the range of 1/50 to 1/5, preferably in the range of 1/25 to 1/10. It is preferable that the ratio of water recovered by the hydrating apparatus is controlled to be 70% to 95% of the water supplied to the compressed airflow from the hydrating apparatus.

  By setting it within this range, it is possible to secure a sufficient amount of recovered heat, achieve stable combustion, and obtain higher output and higher efficiency.

  Further, the amount of water sprayed from the spraying device 11 is in the range of 0.2% to 5.0%, preferably in the range of 0.4% to 2.5% with respect to the air weight flow rate. The amount of water sprayed from 7 is preferably controlled to be 1.0% or more and 30% or less with respect to the compressor discharge weight flow rate.

  Moreover, at the time of starting, it can be performed as follows, for example. The supply of the spray water to the intake spray device 11 is stopped until the load is started by the gas turbine from the start. In addition, a bypass system (not shown) that guides the compressed air discharged from the compressor 2 to the regenerator 5 by bypassing the humidifier 7 or the post-cooler 13 is installed, and the compressed air is allowed to flow through the bypass system.

  After that, until the rated operation, the humidified air is supplied by supplying the compressed air discharged from the compressor 2 from the bypass system to the humidifier 7 or further to the rear cooler 13 while the water supply to the intake spray device 11 is stopped. 7 Add water.

  After the rated operation, water is sprayed from the intake spray device 11. Thereby, it can start in a short time.

  Further, when the load changes, for example, the following control can be performed.

  When reducing the load, the amount of water added to the compressed air is reduced by the humidifier 7. Next, the amount of water sprayed by the intake spray device is lowered.

  When the amount of water added to the compressed air by the humidifier 7 is lowered, the amount of input fuel 50 may be lowered as necessary.

  When increasing the load, the amount sprayed by the intake spray device 11 is increased, and then the amount of water added to the compressed air is increased by the humidifier 7.

  By doing in this way, in addition to the said effect, it can contribute to the highly efficient driving | operation at the time of partial load.

  The above control is an example, and the present invention is not limited to this.

  A second embodiment will be described with reference to FIG.

  FIG. 3 is a schematic diagram showing another embodiment of the present invention.

  A difference from the example of FIG. 1 is that a water recovery device 8 that recovers moisture contained in the exhaust gas is provided instead of the makeup water supply device 15. Specifically, in addition to the configuration in FIG. 1, combustion exhaust gas that has passed through the regenerator 5 (combustion exhaust gas that has passed through the feed water heater 6 when the feed water heater 6 is provided) is supplied, and water that recovers moisture in the exhaust gas A recovery device 8 is provided. Moreover, the water treatment apparatus 10 which purifies the water collect | recovered with the water recovery device 8 is provided. The water purified by the water treatment device 10 is guided to the intake spray device 11 or the humidifier 7.

  Preferably, as shown in FIG. 3, in addition to the above-described configuration, an exhaust gas reheater 9 is further installed to exchange heat by supplying exhaust gas that has passed through the feed water heater 6 and exhaust gas that has passed through the water recovery unit 8.

  Moreover, when the recovered water is insufficient, the water supplied to the intake spray device 11 or the humidifier 7 is replenished from outside the system. Preferably, the recovered water is guided to the humidifier 7 so that when the recovered water amount is larger than the amount of water supplied to the humidifier 7, the recovered water is preferentially flowed to the humidifier so that the intake spray device 11 is supplied with water. To do. If necessary, make-up water is introduced from outside the system to the intake spray device.

  In this embodiment, the exhaust gas that has passed through the reheater 5 (feed water heater 6) is supplied to the exhaust gas reheater 9, and heat exchange with the low-temperature exhaust gas having a low moisture content through the water recovery device 8 is performed. , The temperature drops, and the water is recovered by being supplied to the water recovery unit 8. As an example of a measure for recovering moisture contained in the exhaust gas, there is a method of cooling the gas below the saturation temperature (dew point) of water vapor contained in the gas. For example, cooling water is supplied from outside the system to lower the temperature. The exhaust gas exiting the water recovery unit 8 is heated via the exhaust gas reheater 9 and then released from the exhaust tower (not shown) into the atmosphere.

  Since it is considered that carbon dioxide and impurities in the combustion exhaust gas are dissolved in the recovered water, after removing it with the water treatment device 10, it is reused as makeup water for the humidifier 7 and spray water for the intake spray device 11. Use. Note that the spray water of the intake spray device 11 may be supplied from the makeup water supply device 15 (not shown) without using the recovered water.

  This embodiment is characterized in that moisture is recovered from exhaust gas and reused.

  How much of the moisture contained in the exhaust gas is recovered depends on how much the exhaust gas is cooled by the water recovery device. If the entire exhaust gas can be cooled to about 38 ° C, the amount used as make-up water can be reduced. Corresponding recovered water can be obtained. In this case, it is also possible to construct a system that reuses the recovered water and substantially eliminates the need for makeup water. As the makeup water, for example, treated industrial water is usually used, but from the viewpoint of thermal energy, the temperature of industrial water is often equal to or slightly lower than the atmospheric temperature. On the other hand, the water recovered from the exhaust gas is at a temperature level of about 38 ° C., which is higher than the normal atmospheric temperature. If the recovery method is devised, it is possible to obtain water at a higher temperature level of about 60 ° C. In this embodiment, the water supplied to the humidifier 7 is, for example, high-temperature water around 180 ° C., and heat recovery is performed by various heat exchangers in order to obtain this high-temperature water. Therefore, it is preferable that the makeup water supplied to the humidifier has a higher temperature.

  In this embodiment, moisture is recovered from the exhaust gas and reused, so that water having a temperature higher than that of normal industrial water can be used. This means that if the amount of heat for obtaining the high-temperature water supplied to the humidifier is the same, the amount of heat recovered by various heat exchangers can be reduced, and the heat exchanger can be downsized or the heat exchange medium The circulation flow rate can be reduced. Thereby, since the pressure loss of the apparatus connected to the gas turbine can be reduced, the power generation efficiency is improved. Further, since the recovered water containing heat can be used from the combustion exhaust gas and the heat generated by the gas turbine can be returned to the upstream side of the combustor and reused, the efficiency of the gas turbine can be improved from the embodiment of FIG. it can. Moreover, it can contribute to high-efficiency operation even at the time of partial load.

When the fuel 50 is vaporized liquefied natural gas, a fuel heater for exchanging heat with water supplied through the water supply path to the intake spray device 11 can be provided in the fuel supply path. The fuel guided to the combustor 4 is heated by water supplied to the intake spray device 11. The water supplied to the intake spray device 11 is supplied to the intake spray device 11 in a state where the temperature is further lowered due to heat being removed when passing through the fuel heater.

  A third embodiment will be described with reference to FIG.

  FIG. 4 is a schematic view showing still another embodiment of the present invention.

  The difference from the example of FIG. 3 is that the water recovery device 8 is assumed to be a direct contact type water recovery device that sprays cold water, and the water supplied to the intake spray device 11 and the water supplied to the humidifier 7 are different. The point is that they are collected from different positions.

  Specifically, in addition to the configuration in FIG. 1, combustion exhaust gas that has passed through the regenerator 5 (combustion exhaust gas that has passed through the feed water heater 6 when the feed water heater 6 is provided) is supplied, and water that recovers moisture in the exhaust gas A recovery device 8 is provided. Moreover, the water treatment apparatus 10 which purifies the water collect | recovered with the water recovery device 8 is provided. Moreover, the circulating water cooler 14 which cools the water collect | recovered with the water recovery device 8 is provided. The water recovered by the water recovery device 8 is supplied to the water supply path leading to the humidifier 7, and the water recovered by the water recovery device 8 and further reduced in temperature is supplied to the water supply path guided to the intake spray device 11.

  Further, preferably, as shown in FIG. 4, in addition to the above-described configuration, an exhaust gas reheater 9 is further installed to exchange heat by supplying exhaust gas that has passed through the feed water heater 6 and exhaust gas that has passed through the water recovery unit 8. .

  The exhaust gas that has passed through the regenerator 5 (feed water heater 6) is supplied to the exhaust gas reheater 9, and the temperature is reduced by the exhaust gas that has passed through the water recovery device 8. And it is supplied to the water recovery device 8 and water is recovered. The exhaust gas exiting the water recovery unit 8 is heated via the exhaust gas reheater 9 and then released from the exhaust tower (not shown) into the atmosphere.

  Part of the water recovered by the water recovery device 8 is guided to the humidifier 7 via the water treatment device 10. Further, the other part is cooled through the circulating water cooler 14 and then led again to the water recovery unit 8 to contribute to water recovery. A part of the water cooled by the circulating water cooler 14 is supplied to the intake spray device 11. Any water is purified and supplied as necessary.

The intake spray device 11 is expected to cool the gas turbine intake air, and for this purpose, the water temperature is preferably low. On the other hand, the makeup water in the humidifier 7 is recovered by heat and heated to a high temperature. Therefore, a part of the water exiting the circulating water cooler 14 is branched and supplied to the intake spray device 11, and the supplementary water of the humidifier 7 is supplied from the recovered water that has the highest temperature in the water recovery loop. By configuring the system to do so, the water recovery effect is enhanced and the effect of intake air cooling is increased, so that an increase in output can be expected. In addition, the amount of recovered water increases and the amount of water to be replenished can be reduced. In addition, since the supply water supply temperature to the humidifier becomes high, the humidifier and the exhaust heat recovery heat exchanger can be downsized, and the pressure loss is reduced, so that the efficiency is improved.

  Therefore, high efficiency and high output operation can be achieved while achieving stable combustion. Moreover, it can contribute to the efficiency improvement at the time of partial load.

  A specific example of the water recovery unit 8 will be described with reference to FIG.

  The latent heat of condensation of water vapor at 40 ° C at atmospheric pressure is about 570 kcal / kg. When 1 kg of this water vapor is condensed with cold water spray, if the temperature rise of the cold water is 10 ° C, the specific heat of water is about 1 kcal / kg. Since it is kg, the required spray flow rate is about 57 kg. The spray flow rate required for water recovery from exhaust gas, in other words, the condensation of water vapor, varies depending on the design conditions of the water recovery device, but usually requires several tens of times the steam flow rate. Therefore, if a water recovery method is devised, it is possible to obtain high-temperature recovered water and low-temperature spray water separately, and FIG. 6 shows a configuration example for obtaining high-temperature recovered water.

  In this embodiment, two types of low temperature and high temperature are recovered from the water recovery device 8. Hot recovered water is supplied to the humidifier 7, and low temperature recovered water is supplied to the intake spray device 11.

  The combustion exhaust gas containing a large amount of water vapor that has passed through the feed water heater 6 is cooled by a heat exchanger (for example, the exhaust gas reheater 9), and then flows into the water recovery device 8, where it cools in direct contact with the cooling water. It becomes wet steam and a part of it is condensed and recovered. The remaining exhaust gas is heated by a heat exchanger and then released to the atmosphere via a chimney. The water recovery device 8 has a plurality of water recovery means arranged in series with respect to the gas flow. Each of the water recovery means has a cooling water spraying part that sprays the exhaust gas flowing through the cooling water, and sprayed water and condensed water. A collection unit for collecting is provided. An exhaust gas is configured to flow between the cooling water spraying unit and the recovery unit. Further, at least a part of the recovered water is used as cooling water for the cooling water spraying portion of the water recovery means located on the upstream side of the gas flow. Specifically, it is shown below.

  In the water recovery device 8, the cooling water passes through the pipe 41 and is sprayed into the exhaust gas by the cooling water spraying part 51a, and the sprayed water and the condensed water are recovered by the water recovery part 51b. The recovered water passes through the piping 43 and is cooled by the circulating water cooler 14 and then circulated and used as cooling water through the piping 41. By the way, a part of the recovered water recovered by 51b is sent to the cooling water spraying part 52a via the pipes 44 and 45. Since the spray water sent to 52a has absorbed condensation latent heat, temperature is higher than the spray water of 51a. The spray water of 52a is collected by 52b and sent to the cooling water spraying part 53a through the pipes 46 and 47. By repeating this process, the recovered water in the pipe 60 at the outlet of the water recovery apparatus can be recovered at a higher temperature than the recovered water in the pipe 42. The recovered water in the pipe 60 exiting from the water recovery part 59b of the most upstream water recovery means is used again via the water treatment device 10.

  The exhaust gas reheater 9 is for heating the exhaust gas after water recovery. In this example, the exhaust gas reheater 9 is a gas-gas heat exchanger using the exhaust gas before water recovery as a heat source. If a heat source is obtained, it may be used.

  Thereby, recovered water having different temperatures is obtained. Moreover, high temperature recovered water can be easily obtained. For this reason, the thermal energy possessed by the exhaust gas can be recovered in a high energy state.

  With such a configuration, it is possible to obtain recovered water having a high temperature and spray circulating water having a low temperature in direct contact spray cooling.

  In the high-humidity gas turbine, the combustion gas contains about 25 to 30% of the moisture by volume, and the dew point of the combustion exhaust gas is close to 70 ° C. Water can be recovered if the exhaust gas is cooled to a temperature lower than the dew point temperature. However, in the direct contact spray cooling, by adopting the structure as in this embodiment, for example, the recovered water having a high temperature of about 60 ° C. Circulating water having a low temperature of about 30 ° C. can be obtained. If this high-temperature water is used as makeup water for the humidifier, the same effects as in Example 3 shown in FIG. 4 can be obtained.

  Thus, if the high-temperature recovered water out of the recovered water in the water recovery device 8 is sent to the humidifier 7 via the water treatment device 10 and the feed water heater 6, the plant thermal efficiency can be further increased. On the other hand, since the low-temperature recovered water passes through the water treatment device 10 and becomes spray water in the intake spray device 11, it is effective for further lowering the temperature of the intake air flowing through the intake chamber 22.

  A fourth embodiment will be described with reference to FIG.

  FIG. 5 is a schematic view showing still another embodiment of the present invention.

  The difference from the example of FIG. 3 is that the water recovery device 8 is assumed to be a direct contact type water recovery device that sprays cold water, and the water supplied to the intake spray device 11 and the water supplied to the humidifier 7 are different. In addition to the structure sampled from different positions, spray devices are installed in a plurality of stages along the air flow in the intake chamber 22, and the spray device is located downstream from the water ejected from the spray device located upstream. This is the point that the temperature of water ejected from the water becomes higher.

  Specifically, in addition to the configuration of FIG. 1, combustion exhaust gas that has passed through the regenerator 5 (combustion exhaust gas that has passed through the feed water heater 6 when the feed water heater 6 is provided) is supplied, and water that recovers moisture in the exhaust gas A recovery device 8 is provided. Moreover, the water treatment apparatus 10 which purifies the water collect | recovered with the water recovery device 8 is provided. Moreover, the circulating water cooler 14 which cools the water collect | recovered with the water recovery device 8 is provided. The water recovered by the water recovery device 8 is supplied to the water supply path leading to the humidifier 7. Furthermore, a part is branched from the middle, and a part is supplied as spray water to the intake spray device 16 installed on the compressor inlet side from the intake spray device 11 in the intake chamber 22. Water that has been recovered by the water recovery device 8 and further reduced in temperature is supplied to the water supply path that leads to the intake spray device 11.

  Further, preferably, as shown in FIG. 5, in addition to the above configuration, an exhaust gas reheater 9 is further installed to exchange heat by supplying exhaust gas that has passed through the feed water heater 6 and exhaust gas that has passed through the water recovery unit 8. . As the intake spray device 16, a device capable of producing the same effect as the intake spray device 11 can be used.

  As in the embodiment of FIG. 4, low-temperature water is supplied to the intake spray device 11, and high-temperature water is supplied to the intake spray device 16 in the same manner as makeup water to the humidifier 7.

  With such a configuration, the intake water spray device 11 can be expected to have a large effect of intake air cooling (corresponding to the output increase mechanism 1 when the embodiment of FIG. 1 is explained), and the spray water from the intake air spray device 16. Is more easily evaporated in the compressor, the effects 2) to 4) of the above-described output increase mechanism are increased.

  The reason why the spray water from the intake spray device 16 is more likely to evaporate in the compressor is that the temperature is high, so less heat energy is required for evaporation and the surface of the water as the temperature rises. Since the tension is reduced, the spray water can be easily made finer, and the fine droplets have a larger surface area per unit weight, which may promote evaporation.

  As a result, the amount of water evaporated to the compressor outlet among the droplets sprayed from the intake spray device 11 and the intake spray device 16 is considered to be larger than that in the example of FIG. 4, and the output and efficiency are further improved. .

  In this way, as in the present embodiment, the spray device 11 is installed in the intake chamber 22 in multiple stages along the air flow, and is sprayed downstream from the water ejected from the spray device 11 located upstream. Since the temperature of the water ejected from the device 16 is increased, the intake air is cooled by the water spray device 11 in the previous stage, and the air weight flow rate is increased. In addition, by spraying high-temperature water from the latter-stage water spray device 16 installed near the inlet of the compressor, a large amount of water that easily evaporates in the compressor 22 can be included in the air entering the compressor 22.

  For this reason, by increasing the ratio of the amount of water supplied from the spraying devices 11 and 16 to the amount of water supplied from the water injection device, it is possible to contribute to stable combustion while further improving output and increasing efficiency.

  The intake spray device 11 is arranged in the vicinity of the intake filter chamber in the intake chamber 22. For example, when a silencer or the like is installed in the intake chamber 22, for example, it is installed adjacent to the silencer immediately after the silencer. Alternatively, it may be installed immediately after the filter in the intake filter chamber 21. Further, the intake spray device 16 is preferably arranged in the vicinity of the compressor inlet in the intake chamber 22. For example, in the vicinity of the boundary between the intake chamber 22 in the intake chamber 22 and the inlet of the compressor 2. Thereby, since the distance until the droplet sprayed from the spraying device 11 flows into the compressor is increased, an effect of increasing the intake air cooling effect and increasing the output can be obtained.

  A sixth embodiment will be described with reference to FIGS.

  The form of each said Example can perform high output and high efficiency, obtaining the stability of a combustor, even if it sees as an efficiency increase apparatus installed in order to improve efficiency in the existing gas turbine equipment.

  For example, in an existing gas turbine power generation facility as shown in FIG. 1, normally, an intake chamber 22 that takes in air 20, a compressor 2 that compresses and discharges supplied air, and air that is discharged from the compressor 2 It has a combustor 4 in which fuel is combusted, a gas turbine 1 driven by the combustion gas of the combustor 4, and a generator 3 driven by the gas turbine.

  In the air intake chamber 22 on the upstream side of the compressor 2, water sprayed on the air supplied to the compressor 2 and sprayed before being introduced into the compressor 2. An intake spray device 11 that vaporizes a part of the droplets and vaporizes the unvaporized droplets introduced into the compressor 2 together with the air while flowing down in the compressor 2; A humidifier (hydrater) 7 for adding water to the compressed air discharged from the compressor 2 containing water sprayed by the device 11, and compressed air containing moisture added by the humidifier 7 are supplied to the gas An efficiency increasing device including a regenerator 5 heated with turbine exhaust gas as a heat source is installed.

  In addition, a makeup water supply device 15 that supplies water to the intake spray device 11 and the humidifier 7 is installed.

  Moreover, the post-cooler 13 which cools the compressed air supplied to the humidifier 7 by using the water supplied to the humidifier 7 as a cold heat source as needed is provided. Moreover, the water supply heater 6 which heats the water supplied to the humidifier 7 by using the exhaust gas which passed through the regenerator 5 as a heat source is provided.

  Thereby, it is possible to configure a high-humidity gas turbine facility with high combustion stability while obtaining a desired output and efficiency, and the same effects as in FIG. 1 can be achieved.

  Further, together with or instead of the makeup water supply device, moisture in the exhaust gas is recovered from the combustion exhaust gas that has passed through the regenerator, and the recovered water is supplied to at least the water adding device of the spraying device and the water adding device. And a route. Thereby, the same effect as FIG. 3 can be produced.

It is a schematic diagram which shows one Example of this invention. It is a schematic diagram which shows the effect of the intake spray device 11 and the humidifier 7. It is a schematic diagram which shows one Example of this invention. It is a schematic diagram which shows one Example of this invention. It is a schematic diagram which shows one Example of this invention. It is a schematic diagram which shows one Example of 8 parts of water recovery devices.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Gas turbine, 2 ... Compressor, 3 ... Generator, 4 ... Combustor, 5 ... Regenerator, 6 ... Feed water heater, 7 ... Humidifier, 8 ... Water recovery device, 9 ... Exhaust gas reheater, 10 DESCRIPTION OF SYMBOLS ... Water treatment apparatus, 11 ... Spraying apparatus, 13 ... Post-cooling device, 14 ... Circulating water cooler, 15 ... Supply water supply apparatus, 16 ... Spraying apparatus, 18 ... Control apparatus, 20 ... Air, 21 ... Intake filter chamber , 22 ... intake chamber, 41, 42, 43, 44, 45, 46, 47, 60 ... piping, 50 ... fuel, 51a, 52a, 53a ... cooling water spraying part, 51b, 52b, 59b ... water recovery part.

Claims (10)

A compressor that compresses air, a humidifier that is installed in a path that guides compressed air discharged from the compressor to the combustor, adds moisture to the compressed air that flows through the path, and is downstream of the humidifier A regenerator that is installed in the path and heats the compressed air that has passed through the humidifier with exhaust gas discharged from the gas turbine, a combustor that combusts air and fuel discharged from the regenerator, and combustion of the combustor In a gas turbine facility comprising a turbine driven by gas,
The compressor is configured to compress air without using an intercooler;
Water is sprayed on the air supplied to the compressor to vaporize some of the droplets sprayed before being introduced into the compressor, and the air that has been introduced into the compressor together with the air is not yet introduced. A spraying device configured to vaporize the vaporized droplets while flowing down the compressor is installed on the upstream side of the compressor,
A gas turbine equipment comprising: a control device that controls to reduce the amount of water sprayed by the spraying device after reducing the amount of water added to the compressed air by the humidifying device when the load drops. A compressor that compresses air, a humidifier that is installed in a path that guides compressed air discharged from the compressor to the combustor, adds moisture to the compressed air that flows through the path, and is downstream of the humidifier A regenerator that is installed in the path and heats the compressed air that has passed through the humidifier with exhaust gas discharged from the gas turbine, a combustor that combusts air and fuel discharged from the regenerator, and combustion of the combustor In a gas turbine facility comprising a turbine driven by gas,
The compressor is configured to compress air without using an intercooler;
Water is sprayed on the air supplied to the compressor to vaporize some of the droplets sprayed before being introduced into the compressor, and the air that has been introduced into the compressor together with the air is not yet introduced. A spraying device configured to vaporize the vaporized droplets while flowing down the compressor is installed on the upstream side of the compressor,
A gas turbine equipment comprising a control device that controls to increase the amount of water added to compressed air by the humidifier after increasing the amount of water sprayed by the spray device when the load increases. A compressor that compresses air; a humidifier that is installed in a path that guides compressed air discharged from the compressor to the combustor; and adds moisture to the compressed air that flows through the path; and compressed air that has passed through the humidifier A gas comprising a regenerator that exchanges heat with the exhaust gas discharged from the gas turbine, a combustor that combusts air and fuel discharged from the regenerator, and a turbine that is driven by the combustion gas of the combustor. In turbine equipment,
The compressor is configured to compress air without using an intercooler;
The sprayed droplets are introduced into the compressor together with the air whose temperature has been lowered by spraying water on the air supplied to the compressor to lower the temperature of the air entering the compressor from the outside air temperature. Is installed on the upstream side of the compressor, a spraying device adapted to vaporize in the compressor while flowing down,
A gas turbine equipment comprising: a control device that controls to reduce the amount of water sprayed by the spraying device after reducing the amount of water added to the compressed air by the humidifying device when the load drops. A compressor that compresses air; a humidifier that is installed in a path that guides compressed air discharged from the compressor to the combustor; and adds moisture to the compressed air that flows through the path; and compressed air that has passed through the humidifier A gas comprising a regenerator that exchanges heat with the exhaust gas discharged from the gas turbine, a combustor that combusts air and fuel discharged from the regenerator, and a turbine that is driven by the combustion gas of the combustor. In turbine equipment,
The compressor is configured to compress air without using an intercooler;
The sprayed droplets are introduced into the compressor together with the air whose temperature has been lowered by spraying water on the air supplied to the compressor to lower the temperature of the air entering the compressor from the outside air temperature. Is installed on the upstream side of the compressor, a spraying device adapted to vaporize in the compressor while flowing down,
A gas turbine equipment comprising a control device that controls to increase the amount of water added to compressed air by the humidifier after increasing the amount of water sprayed by the spray device when the load increases. The gas turbine equipment according to any one of claims 1 to 4,
A gas turbine facility comprising: a path for supplying water recovered from the combustion exhaust gas that has passed through the regenerator to at least one of the spraying device and the humidifying device. The gas turbine equipment according to any one of claims 1 to 4,
The spray device is installed in a plurality of stages along the air flow in the intake chamber of the compressor, and is sprayed from a spray device located downstream from water sprayed from the spray device located upstream. A gas turbine facility characterized in that the temperature of water is increased. The gas turbine equipment according to any one of claims 1 to 4,
And a control device that controls the water temperature supplied to the humidifying device to be higher than the water temperature supplied to the spraying device. The gas turbine equipment according to any one of claims 1 to 4,
A water supply path for supplying water recovered from the combustion exhaust gas passed through the regenerator to the spraying device and the humidifying device;
A gas turbine facility, comprising: a cooling device that cools the compressed air flowing upstream of the humidifier by exchanging heat with water supplied to the humidifier. The gas turbine equipment according to claim 8, wherein
Instead of the water supply path,
A water supply path for supplying water recovered from the flue gas that has passed through the regenerator to the humidifier;
A spray water supply path for guiding spray water supplied from outside the system to the spray device;
A gas turbine facility comprising: The gas turbine equipment according to any one of claims 1 to 4,
A water supply path for supplying water recovered from the combustion exhaust gas passed through the regenerator to the spraying device and the humidifying device;
A gas turbine facility, comprising: a feed water heater that raises the temperature of water supplied to the humidifier by using combustion exhaust gas that has passed through the regenerator as a heat source.

Images