Geothermal power plant system

Abstract

To preferably prevent solid substances like scale from precipitating in a geothermal power generation plant system.SOLUTION: A geothermal power generation plant system which generates electric power through processing heat source water comprises: a cyclone solid-liquid separation section which separates solid substances in the heat source water from the same; and a heat exchange section which performs heat exchange with the heat source water discharged from the cyclone solid-liquid separation section. The geothermal power generation plan system may have a gas-liquid separation section which separates gaseous substances from the heat source water supplied to the cyclone solid-liquid separation section.SELECTED DRAWING: Figure 2

Description

Technical Field

[0001] The present invention relates to a geothermal power generation plant system.

Background Art

[0002] Conventionally, a geothermal power generation plant system that processes high-temperature heat source water in geothermal energy and generates electricity is known (see, for example, Patent Documents 1 and 2). Patent Document 1 Japanese Patent Laid-Open No. 11-239702 Patent Document 2 Japanese Patent Laid-Open No. 2019-196854

Summary of the Invention

Problems to be Solved by the Invention

[0003] In a geothermal power generation plant system, it is preferable to prevent the precipitation of solid substances such as scale.

Means for Solving the Problems

[0004] In a first aspect of the present invention, a geothermal power generation plant system that generates electricity by treating heat source water is provided. The geothermal power generation plant system may include a cyclone solid-liquid separation unit. The cyclone solid-liquid separation unit may separate the heat source water and solid substances in the heat source water. The geothermal power generation plant system may include a heat exchange unit. The heat exchange unit may exchange heat of the heat source water from the cyclone solid-liquid separation unit.

[0005] The geothermal power generation plant system may include a gas-liquid separation unit. The gas-liquid separation unit may separate gaseous substances from the heat source water supplied to the cyclone solid-liquid separation unit.

[0006] The geothermal power generation plant system may include a flow rate control unit. The flow rate control unit controls the swirling flow rate of the heat source water supplied to the cyclone solid-liquid separation unit.

[0007] The geothermal power plant system may have a first piping system. The first piping system may supply heat source water. The geothermal power plant system may have a second piping system. The second piping system may supply heat source water. The second piping system may have a smaller diameter than the first piping system. The flow velocity control unit may control the valves provided in the first piping system and the valves provided in the second piping system. The second piping system may be located above the first piping system.

[0008] The geothermal power plant system may be equipped with a water supply pump. The water supply pump may be installed in the flow path of the heat source water between the cyclone solid-liquid separation section and the heat exchange section. The water supply pump may supply the heat source water to the heat exchange section. The operation of the water supply pump may be controlled based on the swirling flow velocity of the heat source water.

[0009] The flow velocity control unit may control the swirling flow velocity of the heat source water based on the amount of solid material deposited at the bottom of the cyclone solid-liquid separation section.

[0010] A geothermal power plant system may include a loop control unit. The loop control unit may control valves to form a loop flow path that includes at least one of a heat exchange section and a cyclone solid-liquid separation section.

[0011] The loop control unit may control the valve to form a loop flow path that includes a heat exchanger but does not include a cyclone solid-liquid separation unit. Alternatively, the loop control unit may control the valve to form a loop flow path that includes both a heat exchanger and a cyclone solid-liquid separation unit.

[0012] The geothermal power plant system may include a detergent injection section. The detergent injection section may be located in the heat source water flow path between the cyclone solid-liquid separation section and the heat exchange section. The detergent injection section may introduce the detergent into the loop flow path.

[0013] The detergent dispenser may control the amount of detergent dispensed based on the temperature of the heat source water discharged from the heat exchanger.

[0014] The cyclone solid-liquid separation unit may control the discharge of solid material based on the amount of solid material accumulated at the bottom of the cyclone solid-liquid separation unit.

[0015] It should be noted that the above summary of the invention does not enumerate all of its features. Furthermore, subcombinations of these features may also constitute an invention. [Brief explanation of the drawing]

[0016] [Figure 1] This figure shows an example of the operation of a geothermal power plant system 100 related to a comparative example. [Figure 2] This figure shows an example of the operation of the geothermal power plant system 200 according to the embodiment. [Figure 3] This figure shows an example of the operation of the geothermal power plant system 300 according to the embodiment. [Figure 4] This figure shows an example of the operation of the geothermal power plant system 400 according to the embodiment. [Figure 5] This figure shows an example of the operation of the geothermal power plant system 500 according to the embodiment. [Figure 6] This figure shows an example of the operation of the geothermal power plant system 600 according to the embodiment. [Figure 7] This figure shows an example of the operation of the geothermal power plant system 700 according to the embodiment. [Figure 8] This figure shows an example of the operation of the geothermal power plant system 800 according to the embodiment. [Figure 9] This figure shows an example of the operation of the geothermal power plant system 900 according to the embodiment. [Figure 10] This figure shows an example of the operation of the geothermal power plant system 900 according to the embodiment during shutdown. [Figure 11] This figure shows an example of the operation of the geothermal power plant system 1000 according to the embodiment. [Figure 12] This figure shows an example of the operation of the geothermal power plant system 1000 according to the embodiment during shutdown. [Figure 13] It is a diagram showing an example during the operation of the geothermal power generation plant system 1100 according to an embodiment. [Figure 14] It is a diagram showing an example during the operation of the geothermal power generation plant system 1200 according to an embodiment. [Figure 15] It is a diagram showing an example during the operation of the geothermal power generation plant system 1300 according to an embodiment. [Figure 16] It is a diagram showing an example during the operation of the geothermal power generation plant system 1400 according to an embodiment.

Embodiments for Carrying Out the Invention

[0017] Hereinafter, the present invention will be described through embodiments of the invention. However, the following embodiments do not limit the invention according to the claims. Also, not all combinations of features described in the embodiments are essential for the solution means of the invention.

[0018] FIG. 1 is a diagram showing an example during the operation of the geothermal power generation plant system 100 according to a comparative example. In FIG. 1, a geothermal power generation plant system described in Patent Document 2 is shown. The geothermal power generation plant system 100 includes a geothermal fluid supply unit 10, a geothermal fluid supply pipe 12, a gas-liquid separation unit 20, a heat source water supply pipe 22, a heat exchange unit 124, a pump 140, a heat medium supply pipe 142, a heat medium recovery pipe 144, a heat medium input unit 146, a heat source water discharge pipe 148, an evaporation unit 150, and a binary power generation unit 160.

[0019] The geothermal power plant system 100 processes geothermal fluid 2 supplied from the production well 1500. Geothermal fluid 2 is a high-temperature, high-pressure fluid from the geothermal energy. In this example, geothermal fluid 2 includes gaseous substances 4 and heat source water 6. The production well 1500 is a well that pumps up geothermal fluid 2 from an underground geothermal reservoir. The geothermal power plant system 100 processes the geothermal fluid 2 and generates electricity. The geothermal power plant system 100 also separates heat source water 6 from the geothermal fluid 2 and generates electricity by processing the heat source water 6. In this specification, the state in which the geothermal power plant system generates electricity by processing the geothermal fluid 2 or heat source water 6 is expressed as "operation". Figure 1 shows the geothermal power plant system 100 in operation.

[0020] The geothermal fluid supply unit 10 supplies geothermal fluid 2 to the geothermal power plant system 100. In this example, the geothermal fluid supply unit 10 supplies geothermal fluid 2 to the gas-liquid separation unit 20 via the geothermal fluid supply pipe 12. In the flow path of the geothermal fluid 2, the geothermal fluid supply pipe 12 may be provided between the geothermal fluid supply unit 10 and the gas-liquid separation unit 20.

[0021] The gas-liquid separation unit 20 separates the geothermal fluid 2 into gas and liquid. The gas-liquid separation unit 20 separates gaseous substances 4 from the heat source water 6 supplied to the heat exchange unit 124. The heat source water 6 is a high-temperature liquid, such as water. The gaseous substances 4 are such as water vapor. The gaseous substances 4 may be supplied to a power generation device (not shown). The power generation device may have a turbine. The power generation device may generate electricity by rotating the turbine blades with the gaseous substances 4. In this example, the gas-liquid separation unit 20 supplies the heat source water 6 to the heat exchange unit 124 via a heat source water supply pipe 22. In the flow path of the heat source water 6, the heat source water supply pipe 22 may be provided between the gas-liquid separation unit 20 and the heat exchange unit 124.

[0022] The heat exchange unit 124 exchanges heat between the heat source water 6 and another heat transfer medium. In this example, the heat exchange unit 124 exchanges heat between the heat source water 6 and the heat transfer medium 8. The heat transfer medium 8 may be a hydrophobic liquid with a different specific gravity from the heat source water 6. In this example, the heat transfer medium 8 is a liquid with a higher specific gravity than the heat source water 6. The heat exchange unit 124 supplies the heat transfer medium 8 to the evaporation unit 150 via the heat transfer medium supply pipe 142. In the flow path of the heat transfer medium 8, the heat transfer medium supply pipe 142 may be provided between the heat exchange unit 124 and the evaporation unit 150. A pump 140 may be provided in the heat transfer medium supply pipe 142 to supply the heat transfer medium 8. The pump 140 supplies the heat transfer medium 8 to the evaporation unit 150.

[0023] The heat exchange unit 124 may discharge the heat source water 6 via the heat source water discharge pipe 148. The heat exchange unit 124 may discharge the heat source water 6 to the reinjection well 1600 via the heat source water discharge pipe 148. The reinjection well 1600 is a well that returns the steam and hot water used for power generation to the underground geothermal reservoir.

[0024] A heat transfer medium 8 is supplied to the evaporation unit 150. Therefore, the evaporation unit 150 is heated by the heat transfer medium 8. The evaporation unit 150 may evaporate an unshown heat transfer medium (referred to as a binary heat transfer medium) by the heat of the heat transfer medium 8. The binary heat transfer medium is a liquid with a lower boiling point than water, such as ammonia water. The binary power generation unit 160 may generate electricity using the binary heat transfer medium evaporated by the evaporation unit 150. The binary power generation unit 160 may have a turbine. The power generation device may generate electricity by rotating the blades of the turbine using the binary heat transfer medium evaporated by the evaporation unit 150.

[0025] The evaporation unit 150 supplies the heat medium 8 to the heat medium input unit 146 via the heat medium recovery pipe 144. In the flow path of the heat medium 8, the heat medium recovery pipe 144 may be provided between the evaporation unit 150 and the heat medium input unit 146. The heat medium input unit 146 returns the heat medium 8 to the heat exchange unit 124.

[0026] In geothermal power plant systems 100, the precipitation of solid materials such as scale can sometimes be a problem. Scale is a component found in water. Examples of scale include silica scale and calcium scale. In geothermal power plant systems 100, a heat transfer medium 8 different from the heat source water 6 is supplied to the evaporation section 150, thus suppressing the precipitation of scale in the evaporation section 150.

[0027] However, in the geothermal power plant system 100, even if the heat transfer medium 8 is hydrophobic, it is difficult to completely suppress the absorption of moisture. Therefore, there is a high possibility that the heat transfer medium 8 contains scale components. As a result, scale precipitation may occur in the evaporation section 150. In addition, the heat source water 6 and the heat transfer medium 8 may be supplied to the evaporation section 150 in a state where separation is insufficient within the heat exchange section 124. In this case as well, scale precipitation may occur in the evaporation section 150. Therefore, it is preferable to provide a structure that suppresses scale precipitation caused by the heat transfer medium 8.

[0028] Furthermore, the heat source water 6 contains undissolved suspended silica particles, grown scale particles, sand, etc. (referred to as solid matter). Since the solid matter has a higher specific gravity than the heat transfer medium 8, it may mix with the heat transfer medium 8 and be supplied to the evaporation section 150. It is conceivable to remove the solid matter with a mesh filter, but using a filter may cause clogging. Therefore, it is preferable to provide a structure other than a filter that can separate the solid matter from the heat transfer medium 8.

[0029] Furthermore, the geothermal power plant system 100 uses a heat transfer medium 8, which makes the system complex and high-cost. Cost reduction is important in order to shorten the payback period for investment in geothermal power plant systems.

[0030] Figure 2 shows an example of the operation of a geothermal power plant system 200 according to an embodiment. The geothermal power plant system 200 includes a geothermal fluid supply unit 10, a geothermal fluid supply pipe 12, a gas-liquid separation unit 20, a heat source water supply pipe 22, a cyclone solid-liquid separation unit 30, control valves 32 and 34, a flow velocity sensor 35, a heat source water discharge pipe 36, a heat source water supply pipe 38, a water supply pump 40, a heat source water discharge pipe 42, a heat exchange unit 50, a flow velocity control unit 52, a binary power generation unit 60, and an operation control unit 70. In Figure 2, reference numerals identical to those in Figure 1 are omitted from explanation.

[0031] In this example, the gas-liquid separation unit 20 supplies heat source water 6 to the cyclone solid-liquid separation unit 30. In the flow path of the heat source water 6, the heat source water supply pipe 22 may be provided between the gas-liquid separation unit 20 and the cyclone solid-liquid separation unit 30. The gas-liquid separation unit 20 separates gaseous substances 4 from the heat source water 6 supplied to the cyclone solid-liquid separation unit 30.

[0032] The cyclone solid-liquid separation unit 30 separates the heat source water 6 from the solid matter 9 contained in the heat source water 6. The solid matter 9 is such as silica particles, grown scale particles, or sand. The heat source water 6 supplied to the cyclone solid-liquid separation unit 30 swirls within the cyclone solid-liquid separation unit 30 as shown in Figure 2. Therefore, the solid matter 9 collides with the side wall 33 of the cyclone solid-liquid separation unit 30 due to centrifugal force. The side wall 33 of the cyclone solid-liquid separation unit 30 is a wall that is approximately parallel to the height direction of the cyclone solid-liquid separation unit 30. The solid matter 9 that collides with the side wall 33 accumulates at the bottom 31 of the cyclone solid-liquid separation unit 30. The bottom 31 of the cyclone solid-liquid separation unit 30 may be the region located between the control valve 34 and the side wall 33 in the cyclone solid-liquid separation unit 30. The cyclone solid-liquid separation unit 30 may also be equipped with a flow velocity sensor 35 for measuring the swirling flow velocity of the heat source water 6.

[0033] In this example, a control valve 32 is provided in the heat source water supply pipe 22. The flow velocity control unit 52 controls the control valve 32. The flow velocity control unit 52 may control the opening degree of the control valve 32. By controlling the opening degree of the control valve 32, the flow velocity control unit 52 may control the swirling flow velocity of the heat source water 6 supplied to the cyclone solid-liquid separation unit 30. In this example, the control valve 32 is open. In this specification, an open control valve is shown as a white fill, and a closed control valve is shown as a black fill.

[0034] A control valve 34 is provided at the bottom 31 of the cyclone solid-liquid separation unit 30. The control valve 34 may be controlled by a control unit (not shown). By controlling the control valve 34, the solid material 9 accumulated at the bottom 31 of the cyclone solid-liquid separation unit 30 can be discharged. In this example, the control valve 34 is closed. The control valve 34 may be opened as appropriate during the operation of the geothermal power plant system 200.

[0035] The cyclone solid-liquid separation unit 30 supplies heat source water 6 to the evaporation unit 150 via a heat source water supply pipe 38. In the flow path of the heat source water 6, the heat source water supply pipe 38 may be provided between the cyclone solid-liquid separation unit 30 and the heat exchange unit 50. A water supply pump 40 may be provided in the heat source water supply pipe 38 to supply the heat source water 6. The water supply pump 40 may be provided in the flow path of the heat source water 6 between the cyclone solid-liquid separation unit 30 and the heat exchange unit 50. The water supply pump 40 may supply the heat source water 6 to the heat exchange unit 50. The operation control unit 70 may control the operation of the water supply pump 40. Note that the operation control unit 70 and the flow velocity control unit 52 may be a single control unit.

[0036] The heat source water 6 is supplied to a heat source water supply pipe 38 located above the cyclone solid-liquid separation unit 30. In this specification, "above," "below," "upper," and "downward" refer to positions in the height direction from the bottom 31 of the cyclone solid-liquid separation unit 30 toward the heat source water supply pipe 38. A portion of the heat source water supply pipe 38 may be located at least at the center of the swirling direction of the heat source water 6. The heat source water supply pipe 38 may be located on the center side of the cyclone solid-liquid separation unit 30. The center of the cyclone solid-liquid separation unit 30 is the center in the direction connecting the two side walls 33 of the cyclone solid-liquid separation unit 30. The position in which the heat source water supply pipe 38 is located may be above the control valve 34.

[0037] The cyclone solid-liquid separation unit 30 may discharge the heat source water 6 via the heat source water discharge pipe 36. The cyclone solid-liquid separation unit 30 may discharge the heat source water 6 to the reinjection well 1600 via the heat source water discharge pipe 36.

[0038] Heat source water 6 is supplied to the heat exchange unit 50. The heat exchange unit 50 exchanges heat with the heat source water 6 from the cyclone solid-liquid separation unit 30. Exchanging heat with the heat source water 6 from the cyclone solid-liquid separation unit 30 means obtaining thermal energy from the heat source water 6. Therefore, the heat exchange unit 50 is heated by the heat source water 6. The heat exchange unit 50 may evaporate a binary heat transfer medium (not shown) by the heat of the heat source water 6. The binary power generation unit 60 may generate electricity using the binary heat transfer medium evaporated by the heat exchange unit 50. The binary power generation unit 60 may have a turbine. The power generation device may generate electricity by rotating the blades of the turbine with the binary heat transfer medium evaporated by the heat exchange unit 50.

[0039] The heat exchange unit 50 discharges the heat source water 6 to the reinjection well 1600 via the heat source water discharge pipe 42. In the flow path of the heat source water 6, the heat source water discharge pipe 42 may be provided between the heat exchange unit 50 and the reinjection well 1600.

[0040] In this example, the geothermal power plant system 200 includes a cyclone solid-liquid separation unit 30 that separates the heat source water 6 from the solid substances 9 in the heat source water 6. Therefore, unlike the geothermal power plant system 200 in Figure 1, it does not use a heat transfer medium 8. As a result, a structure that suppresses scale deposition without using a heat transfer medium 8 can be provided. Furthermore, since the cyclone solid-liquid separation unit 30 does not clog like filters, it can stably remove the solid substances 9. In addition, because it does not use a heat transfer medium 8, the system becomes simpler and costs can be reduced.

[0041] In this example, the flow velocity control unit 52 controls the swirling flow velocity of the heat source water 6 supplied to the cyclone solid-liquid separation unit 30. The flow velocity control unit 52 controls the swirling flow velocity of the heat source water 6 supplied to the cyclone solid-liquid separation unit 30 by controlling the opening degree of the control valve 32. By increasing the swirling flow velocity, the separation efficiency between the heat source water 6 and the solid substance 9 can be increased. However, if the swirling flow velocity is increased too much, the heat source water 6 becomes disordered, which may conversely decrease the separation efficiency between the heat source water 6 and the solid substance 9. Therefore, the operation of the water supply pump 40 may be controlled based on the swirling flow velocity of the heat source water 6. For example, if the swirling flow velocity of the heat source water 6 is above a certain flow velocity, the separation efficiency decreases, so the operation control unit 70 stops the operation of the water supply pump 40. Also, if the swirling flow velocity of the heat source water 6 is below a certain flow velocity, the operation control unit 70 starts the operation of the water supply pump 40. The operation of the water supply pump 40 may be controlled by the loop control unit described later. The swirling flow velocity of the heat source water 6 may also be measured by the flow velocity sensor 35.

[0042] Figure 3 shows an example of the operation of the geothermal power plant system 300 according to the embodiment. The geothermal power plant system 300 in Figure 3 differs from the geothermal power plant system 200 in Figure 2 in that it is equipped with a switching valve 37 and a heat source water supply pipe 54. The geothermal power plant system 300 in Figure 3 also differs from the geothermal power plant system 200 in Figure 2 in that it is not equipped with a control valve 32. Other components of the geothermal power plant system 300 in Figure 3 may be the same as those of the geothermal power plant system 200 in Figure 2. Reference numerals common to both Figure 2 and Figure 3 are not explained.

[0043] In this example, the gas-liquid separation unit 20 supplies heat source water 6 to the heat exchange unit 124 via the heat source water supply pipe 22 and the heat source water supply pipe 54. In the flow path of the heat source water 6, the heat source water supply pipe 54 may be provided between the gas-liquid separation unit 20 and the cyclone solid-liquid separation unit 30. The diameter of the heat source water supply pipe 54 may differ from that of the heat source water supply pipe 22. The pipe diameter is the diameter of the pipe in a cross-section perpendicular to the direction in which the heat source water 6 flows. In this example, the diameter of the heat source water supply pipe 54 is smaller than that of the heat source water supply pipe 22. The heat source water supply pipe 54 may be connected to the heat source water supply pipe 22. The heat source water supply pipe 22 is an example of first piping, and the heat source water supply pipe 54 is an example of second piping.

[0044] The switching valve 37 is provided in the heat source water supply pipe 22 and the heat source water supply pipe 54. The switching valve 37 switches the flow path of the heat source water 6. In this example, the switching valve 37 switches whether the heat source water 6 is supplied to the cyclone solid-liquid separation unit 30 from the heat source water supply pipe 22 or from the heat source water supply pipe 54. The heat source water supply pipe 22 and the heat source water supply pipe 54 have different pipe diameters. Therefore, the flow velocity of the heat source water 6 supplied from the heat source water supply pipe 22 is different from the flow velocity of the heat source water 6 supplied from the heat source water supply pipe 54. By switching the flow path of the heat source water 6, the swirling flow velocity of the heat source water 6 supplied to the cyclone solid-liquid separation unit 30 can be controlled. The switching valve 37 may be controlled by the flow velocity control unit 52. In this example, since the diameter of the heat source water supply pipe 54 is smaller than that of the heat source water supply pipe 22, the flow velocity of the heat source water 6 supplied from the heat source water supply pipe 54 is greater than that of the heat source water 6 supplied from the heat source water supply pipe 22. Because the heat source water 6 supplied from the heat source water supply pipe 54 experiences a greater pressure loss, it is preferable to switch the flow path of the heat source water 6 as needed. The heat source water supply pipe 54 may also continuously supply the heat source water 6.

[0045] In this example, a switching valve 37 is provided, but control valves may also be provided in the heat source water supply pipe 22 and the heat source water supply pipe 54. In this case as well, the flow velocity control unit 52 can control the swirling flow velocity of the heat source water 6 by controlling the control valves provided in each.

[0046] In this example, at least a portion of the heat source water supply pipe 54 is provided above the heat source water supply pipe 22. The supply port of the heat source water supply pipe 54 may be provided above the supply port of the heat source water supply pipe 22. The supply port of the heat source water supply pipe is the point from which the heat source water 6 is discharged. By providing at least a portion of the heat source water supply pipe 54 above the heat source water supply pipe 22, heat source water 6 with a high flow velocity can be supplied to the upper side of the cyclone solid-liquid separation unit 30, and scale can be removed efficiently. In this specification, the upper side of the cyclone solid-liquid separation unit 30 means above the center of the cyclone solid-liquid separation unit 30 in the height direction, and the lower side of the cyclone solid-liquid separation unit 30 means below the center of the cyclone solid-liquid separation unit 30 in the height direction.

[0047] If the heat source water supply pipe is installed above the cyclone solid-liquid separation unit 30, the flow velocity of the supplied heat source water 6 may decrease. Therefore, it is preferable to install the heat source water supply pipe below the cyclone solid-liquid separation unit 30. If the heat source water supply pipe is installed above the cyclone solid-liquid separation unit 30, it is preferable to install a water pump in the heat source water supply pipe to prevent a decrease in flow velocity.

[0048] Figure 4 shows an example of the operation of the geothermal power plant system 400 according to the embodiment. The geothermal power plant system 400 in Figure 4 differs from the geothermal power plant system 200 in Figure 2 in that it includes nozzles 62 and 64, control valves 66 and 68, nozzle control unit 72, and water supply pump 73. The other components of the geothermal power plant system 400 in Figure 4 may be the same as those of the geothermal power plant system 200 in Figure 2. Reference numerals common to both Figure 2 and Figure 4 are not explained.

[0049] The nozzle 62 is a nozzle that discharges the heat source water 6. In this example, the nozzle 62 is located above the cyclone solid-liquid separation unit 30. Above the cyclone solid-liquid separation unit 30, particularly near the heat source water supply pipe 38, the swirling flow velocity of the heat source water 6 weakens, the temperature decreases due to heat dissipation, and scale tends to precipitate and adhere to the side wall 33 of the cyclone solid-liquid separation unit 30. Therefore, by providing the nozzle 62 above the cyclone solid-liquid separation unit 30, the scale above the cyclone solid-liquid separation unit 30 can be removed. Since the nozzle 62 is located above the cyclone solid-liquid separation unit 30, it is preferable to provide a water supply pump 73 to avoid reducing the flow velocity.

[0050] Similarly, the nozzle 64 is a nozzle that discharges the heat source water 6. In this example, the nozzle 64 is located below the cyclone solid-liquid separation unit 30. Below the cyclone solid-liquid separation unit 30, especially near the bottom 31, the heat source water 6 accumulates, the temperature drops due to heat dissipation, and scale tends to precipitate and adhere to the side walls 33 of the cyclone solid-liquid separation unit 30. Therefore, by providing the nozzle 64 below the cyclone solid-liquid separation unit 30, the scale on the lower side of the cyclone solid-liquid separation unit 30 can be removed. A water supply pump 73 may also be provided with the nozzle 64.

[0051] The nozzle control unit 72 may control control valves 66 and 68 and the water supply pump 73. The nozzle control unit 72 may control the discharge of heat source water 6 from nozzle 62 by controlling control valve 66. The nozzle control unit 72 may control the discharge of heat source water 6 from nozzle 64 by controlling control valve 68. The nozzle control unit 72 may also function as a flow velocity control unit.

[0052] Figure 5 shows an example of the operation of the geothermal power plant system 500 according to the embodiment. The geothermal power plant system 500 in Figure 5 differs from the geothermal power plant system 400 in Figure 4 in that it is equipped with spiral piping 74. The other components of the geothermal power plant system 500 in Figure 5 may be the same as those of the geothermal power plant system 400 in Figure 4. Reference numerals common to both Figure 4 and Figure 5 are not explained.

[0053] The spiral piping 74 discharges the heat source water 6 into the reinjection well 1600. In this example, the spiral piping 74 is provided so as to surround the cyclone solid-liquid separation section 30. The spiral piping 74 is provided so as to make at least one full turn around the cyclone solid-liquid separation section 30 in a plane perpendicular to the vertical direction. In the example in Figure 5, the spiral piping 74 surrounds the cyclone solid-liquid separation section 30 in a portion of its vertical region. The spiral piping 74 may also be provided over the entire vertical region of the cyclone solid-liquid separation section 30. The spiral piping 74 may be provided so as to be in contact with the cyclone solid-liquid separation section 30. Heat may be dissipated from the piping before returning the water to the reinjection well 1600. Scale deposition occurs when the temperature of the heat source water 6 drops. In this example, by providing a spiral pipe 74 in contact with the cyclone solid-liquid separation unit 30, heat dissipation from the spiral pipe 74 due to heat from the cyclone solid-liquid separation unit 30 can be suppressed, thereby preventing scale deposition. To conduct heat from the cyclone solid-liquid separation unit 30, the material of the spiral pipe 74 is preferably a material with high thermal conductivity, such as metal. Examples of materials for the spiral pipe 74 include carbon steel and stainless steel. Furthermore, to suppress heat dissipation, it is preferable that the portion of the spiral pipe 74 that does not come into contact with the cyclone solid-liquid separation unit 30 be covered with an insulating material with low thermal conductivity.

[0054] Figure 6 shows an example of the operation of the geothermal power plant system 600 according to the embodiment. The geothermal power plant system 600 in Figure 6 differs from the geothermal power plant system 400 in Figure 4 in that it is equipped with double piping 76. The other components of the geothermal power plant system 600 in Figure 6 may be the same as those of the geothermal power plant system 400 in Figure 4. Reference numerals common to both Figure 4 and Figure 6 are not explained.

[0055] The double-walled pipe 76 discharges the heat source water 6 into the reinjection well 1600. The double-walled pipe 76 is installed inside the cyclone solid-liquid separation section 30. By installing the double-walled pipe 76 inside the cyclone solid-liquid separation section 30, heat dissipation from the double-walled pipe 76 is suppressed by the heat from the cyclone solid-liquid separation section 30 inside the double-walled pipe 76, thereby preventing scale deposition. The double-walled pipe 76 may be made of the same material as the cyclone solid-liquid separation section 30. In order to conduct heat from the cyclone solid-liquid separation section 30, the material of the double-walled pipe 76 is preferably a material with high thermal conductivity, such as metal.

[0056] Figure 7 shows an example of the operation of the geothermal power plant system 700 according to the embodiment. The geothermal power plant system 700 in Figure 7 differs from the geothermal power plant system 400 in Figure 4 in that it is equipped with an insulating material 78. The other components of the geothermal power plant system 700 in Figure 7 may be the same as those of the geothermal power plant system 400 in Figure 4. Reference numerals common to both Figure 4 and Figure 7 are not explained.

[0057] The thermal insulation material 78 is a material with low thermal conductivity. The thermal insulation material 78 may be a commonly used material such as glass wool or rock wool. In this example, the thermal insulation material 78 is installed in contact with the heat source water discharge pipe 36. By installing the thermal insulation material 78, heat dissipation from the piping can be suppressed and scale deposition can be prevented. The thermal insulation material 78 may be installed in contact with the nozzle 62. The thermal insulation material 78 may be installed in contact with the bottom 31. It is preferable that the thermal insulation material 78 be installed in contact with areas where scale deposition is likely to occur.

[0058] Figure 8 shows an example of the operation of the geothermal power plant system 800 according to the embodiment. The geothermal power plant system 800 in Figure 8 differs from the geothermal power plant system 400 in Figure 4 in that it includes a heating unit 82. The other components of the geothermal power plant system 800 in Figure 8 may be the same as those of the geothermal power plant system 400 in Figure 4. Reference numerals common to both Figure 4 and Figure 8 are not explained.

[0059] The heating unit 82 heats the heat source water discharge pipe 36 and the nozzle 62. The heating unit 82 may have resistance. When a voltage is applied to the resistance of the heating unit 82, the heating unit 82 may generate heat. In this example, the heating unit 82 is provided in contact with the heat source water discharge pipe 36. By providing the heating unit 82, heat dissipation from the piping can be suppressed, and scale deposition can be prevented. The heating unit 82 may be provided in contact with the nozzle 62. The heating unit 82 may be provided in contact with the bottom 31. It is preferable that the heating unit 82 be provided in contact with a location where scale deposition is likely to occur.

[0060] Figure 9 shows an example of the operation of the geothermal power plant system 900 according to the embodiment. The geothermal power plant system 900 in Figure 9 differs from the geothermal power plant system 200 in Figure 2 in that it includes a temperature sensor 39, a control valve 55, a heat source water discharge pipe 56, a control valve 58, a detergent input section 80, a control valve 83, and a loop control section 84. The geothermal power plant system 900 in Figure 9 also differs from the geothermal power plant system 200 in Figure 2 in that it does not include a control valve 32, a flow velocity sensor 35, and a flow velocity control section 52. Other components of the geothermal power plant system 900 in Figure 9 may be the same as those of the geothermal power plant system 200 in Figure 2. Reference numerals common to both Figure 2 and Figure 9 are not explained.

[0061] In this example, a control valve 55 is provided in the heat source water supply pipe 22. The loop control unit 84 controls the control valve 55. The loop control unit 84 may control the opening degree of the control valve 55. In this example, the loop control unit 84 controls whether the control valve 55 is in an open state or a closed state. In Figure 9, the control valve 55 is open.

[0062] The cyclone solid-liquid separation unit 30 discharges the solid material 9 accumulated at the bottom 31 of the cyclone solid-liquid separation unit 30 via the heat source water discharge pipe 56. The heat source water discharge pipe 56 may be provided between the bottom 31 of the cyclone solid-liquid separation unit 30 and the reinjection well 1600.

[0063] The heat source water discharge pipes 36, 42, and 56 each have a common section. In this example, the section from the connection point between heat source water discharge pipe 36 and heat source water discharge pipe 56 to the connection point between heat source water discharge pipe 36 or heat source water discharge pipe 56 and heat source water discharge pipe 42 is defined as the common section 57. Heat source water discharge pipes 36 and 56 share this common section 57. The section from the connection point between heat source water discharge pipe 36 or heat source water discharge pipe 56 and heat source water discharge pipe 42 to the reinjection well 1600 is defined as the common section 59. Heat source water discharge pipes 36, 42, and 56 share this common section 59. In Figure 9, the boundaries of the common section 57 and the common section 59 are shown by dotted lines.

[0064] In this example, a control valve 58 is provided in the common section 59. The loop control unit 84 controls the control valve 58. The loop control unit 84 may control the opening degree of the control valve 58. In this example, the loop control unit 84 controls whether the control valve 58 is in an open state or a closed state. In Figure 9, the control valve 58 is open.

[0065] The detergent injection unit 80 introduces the detergent 81 into the flow path of the heat source water 6. The detergent 81 may be hydrofluoric acid or the like. The detergent injection unit 80 may be provided in the heat source water supply pipe 38. The detergent injection unit 80 is provided in the flow path of the heat source water 6 between the cyclone solid-liquid separation unit 30 and the heat exchange unit 50. In this example, the detergent injection unit 80 is provided in the flow path of the heat source water 6 between the cyclone solid-liquid separation unit 30 and the water supply pump 40. The loop control unit 84 controls whether the control valve 83 is open or closed. By controlling the control valve 83, the injection of the detergent 81 by the detergent injection unit 80 can be controlled. In Figure 9, the control valve 83 is closed. In this example, the water supply pump 40 is controlled by the loop control unit 84.

[0066] The temperature sensor 39 is installed in the heat source water discharge pipe 42. The temperature sensor 39 measures the temperature of the heat source water 6 discharged by the heat exchange unit 50. The temperature sensor 39 may be installed in the vicinity of the heat exchange unit 50 in the flow path of the heat source water 6. If scale deposits in the piping, the efficiency of heat exchange in the heat exchange unit 50 decreases. Therefore, by monitoring the temperature of the heat source water 6 discharged by the heat exchange unit 50 with the temperature sensor 39, the amount of scale deposits in the piping can be monitored. The temperature sensor 39 may output the temperature of the heat source water 6 to the detergent input unit 80 or the loop control unit 84.

[0067] Figure 10 shows an example of the operation of the geothermal power plant system 900 according to the embodiment during shutdown. In this example, control valve 55 is closed. Also in this example, control valve 58 is closed. Also in this example, control valve 83 is open.

[0068] In this example, the loop control unit 84 forms a loop flow path that includes at least one of the heat exchange unit 50 and the cyclone solid-liquid separation unit 30. The loop control unit 84 may control control valves 55 and 58 to form a loop flow path that includes at least one of the heat exchange unit 50 and the cyclone solid-liquid separation unit 30. In the geothermal power plant system 900, the loop control unit 84 controls control valves 55 and 58 to form a loop flow path that includes both the heat exchange unit 50 and the cyclone solid-liquid separation unit 30. The loop flow path is a flow path for circulating heat source water 6. By forming a loop flow path, the piping can be cleaned and scale deposition can be suppressed.

[0069] In one loop flow path of this example, the heat source water 6 flows in the following order: cyclone solid-liquid separation unit 30, heat source water supply pipe 38, heat exchange unit 50, heat source water discharge pipe 42, common section 59, common section 57, heat source water discharge pipe 56, and cyclone solid-liquid separation unit 30. In another loop flow path of this example, the heat source water 6 flows in the following order: cyclone solid-liquid separation unit 30, heat source water discharge pipe 36, common section 57, heat source water discharge pipe 56, and cyclone solid-liquid separation unit 30.

[0070] The operation of the geothermal power plant system 900 when it is shut down will be explained. When the temperature of the heat source water 6 discharged from the heat exchange unit 50, as measured by the temperature sensor 39, exceeds a specified value, the loop control unit 84 closes the control valve 55. Next, the loop control unit 84 opens the control valve 34. Next, the loop control unit 84 closes the control valve 58. Then, the loop control unit 84 opens the control valve 83. By opening the control valve 83, the cleaning agent injection unit 80 can inject cleaning agent into the loop flow path, thereby cleaning the piping.

[0071] The operation of the geothermal power plant system 900 at startup is described below. When the temperature of the heat source water 6 discharged by the heat exchange unit 50, as measured by the temperature sensor 39, falls below a specified value, the loop control unit 84 closes the control valve 83. Next, the loop control unit 84 opens the control valve 58. Next, the loop control unit 84 closes the control valve 34. Then, the loop control unit 84 opens the control valve 55. In this way, the geothermal power plant system 900 can be automatically shut down and started. The timing for starting the geothermal power plant system 900 may also be when the discharge pressure of the water supply pump 40 falls below a specified pressure. The discharge pressure of the water supply pump 40 may be monitored by the loop control unit 84.

[0072] The detergent dispenser 80 may control the amount of detergent 81 dispensed based on the temperature of the heat source water 6 discharged by the heat exchanger 50 (output of the temperature sensor 39). For example, when the temperature of the heat source water 6 discharged by the heat exchanger 50 exceeds a predetermined temperature, the detergent dispenser 80 may start dispensing the detergent 81. When the temperature of the heat source water 6 discharged by the heat exchanger 50 falls below the predetermined temperature, the detergent dispenser 80 may stop dispensing the detergent 81. Furthermore, the higher the temperature of the heat source water 6 discharged by the heat exchanger 50, the more detergent 81 the detergent dispenser 80 may dispense. By controlling the amount of detergent 81 dispensed based on the temperature of the heat source water 6 discharged by the heat exchanger 50 (output of the temperature sensor 39), the amount of detergent 81 dispensed can be reduced. The detergent dispenser 80 may also dispense the detergent 81 over time to prevent the concentration of detergent 81 from becoming locally high. In other words, the detergent dispenser 80 may alternately repeat the state of dispensed detergent 81 and the state of not dispensed detergent 81.

[0073] Figure 11 shows an example of the operation of the geothermal power plant system 1000 according to the embodiment. The geothermal power plant system 1000 in Figure 11 differs from the geothermal power plant system 200 in Figure 2 in that it includes a temperature sensor 39, a control valve 58, a detergent injection unit 80, a control valve 83, a loop control unit 84, and a water supply pump 90. The geothermal power plant system 1000 in Figure 11 also differs from the geothermal power plant system 200 in Figure 2 in that it does not include a control valve 32, a flow velocity sensor 35, and a flow velocity control unit 52. Other components of the geothermal power plant system 1000 in Figure 11 may be the same as those of the geothermal power plant system 200 in Figure 2. Reference numerals common to both Figure 2 and Figure 11 are not explained.

[0074] In this example, a control valve 58 is provided in the heat source water discharge pipe 42. The loop control unit 84 controls the control valve 58. The loop control unit 84 may control the opening degree of the control valve 58. In this example, the loop control unit 84 controls whether the control valve 58 is in an open state or a closed state. In Figure 11, the control valve 58 is open.

[0075] In this example, the connecting pipe 92 connects the heat source water supply pipe 38 and the heat source water discharge pipe 42. The connecting pipe 92 may be provided with a detergent injection section 80. The detergent injection section 80 introduces detergent 81 into the flow path of the heat source water 6. The detergent 81 may be hydrofluoric acid or the like. The loop control unit 84 controls whether the control valve 83 is open or closed. By controlling the control valve 83, the injection of detergent 81 by the detergent injection section 80 can be controlled. In Figure 11, the control valve 83 is closed. The connecting pipe 92 may also be provided with a water supply pump 90. In this example, the water supply pump 90 is controlled by the loop control unit 84. The discharge pressure of the water supply pump 90 may be monitored by the loop control unit 84.

[0076] Similar to Figure 10, the temperature sensor 39 is installed in the heat source water discharge pipe 42. The temperature sensor 39 measures the temperature of the heat source water 6 discharged by the heat exchange unit 50. The temperature sensor 39 may be installed in the flow path of the heat source water 6, near the heat exchange unit 50. The temperature sensor 39 may output the temperature of the heat source water 6 to the detergent input unit 80 or the loop control unit 84.

[0077] Figure 12 shows an example of the geothermal power plant system 1000 according to the embodiment during shutdown. In this example, control valve 58 is closed. Also in this example, control valve 83 is open.

[0078] In this example, the loop control unit 84 forms a loop flow path that includes at least one of the heat exchange unit 50 and the cyclone solid-liquid separation unit 30. The loop control unit 84 may control the control valve 58 to form a loop flow path that includes at least one of the heat exchange unit 50 and the cyclone solid-liquid separation unit 30. In the geothermal power plant system 1000, the loop control unit 84 controls the control valve 58 to form a loop flow path that includes the heat exchange unit 50 but does not include the cyclone solid-liquid separation unit 30. By forming a loop flow path, the piping can be cleaned and scale deposition can be suppressed. In the loop flow path of this example, the heat source water 6 flows in the following order: heat source water supply pipe 38, heat exchange unit 50, heat source water discharge pipe 42, connecting pipe 92, and heat source water supply pipe 38.

[0079] The operation of the geothermal power plant system 1000 when it is shut down will be explained. If the temperature of the heat source water 6 discharged from the heat exchange unit 50, as measured by the temperature sensor 39, exceeds a specified value, the loop control unit 84 will stop the water supply pump 40. Next, the loop control unit 84 will close the control valve 58. Then the loop control unit 84 will start the water supply pump 90. Furthermore, the loop control unit 84 will open the control valve 83. By opening the control valve 83, the cleaning agent injection unit 80 will be able to inject the cleaning agent 81 into the loop flow path, thereby cleaning the piping.

[0080] The operation of the geothermal power plant system 1000 at the start of operation is described below. When the temperature of the heat source water 6 discharged by the heat exchange unit 50, as measured by the temperature sensor 39, falls below a specified value, the loop control unit 84 closes the control valve 83. Next, the loop control unit 84 stops the water supply pump 90. Next, the loop control unit 84 opens the control valve 58. Then, the loop control unit 84 starts the water supply pump 40. In this way, the stopping and starting of the geothermal power plant system 1000 can be performed automatically. Note that the timing for starting the operation of the geothermal power plant system 1000 may also be when the discharge pressure of the water supply pump 90 falls below a specified pressure.

[0081] Also, similar to Figure 10, in the geothermal power plant system 1000, the detergent input unit 80 may control the amount of detergent 81 added based on the temperature of the heat source water 6 discharged by the heat exchange unit 50 (output of the temperature sensor 39).

[0082] Figure 13 shows an example of the operation of the geothermal power plant system 1100 according to the embodiment. The geothermal power plant system 1100 in Figure 13 differs from the geothermal power plant system 200 in Figure 2 in that it is equipped with a heat source water discharge pipe 56, a bottom control unit 94, and a stress sensor 96. The geothermal power plant system 1100 in Figure 13 also differs from the geothermal power plant system 200 in Figure 2 in that it is not equipped with a control valve 32, a flow velocity sensor 35, and a flow velocity control unit 52. Other components of the geothermal power plant system 1100 in Figure 13 may be the same as those of the geothermal power plant system 200 in Figure 2. Reference numerals common to both Figure 2 and Figure 13 are not explained.

[0083] The stress sensor 96 measures the amount of solid material 9 deposited at the bottom 31 of the cyclone solid-liquid separation unit 30. The stress sensor 96 may measure the amount of solid material 9 deposited at the bottom 31 of the cyclone solid-liquid separation unit 30 by measuring the compressive stress at the bottom 31 of the cyclone solid-liquid separation unit 30. The stress sensor 96 may be a strain gauge or the like. The stress sensor 96 may output the amount of solid material 9 to the bottom control unit 94.

[0084] The bottom control unit 94 may control the control valve 34. In this example, the bottom control unit 94 (or the cyclone solid-liquid separation unit 30) controls the discharge of solid material 9 based on the amount of solid material 9 accumulated at the bottom 31 of the cyclone solid-liquid separation unit 30. For example, if the amount of solid material 9 accumulated at the bottom 31 of the cyclone solid-liquid separation unit 30 is greater than or equal to a specified value, the bottom control unit 94 opens the control valve 34 to discharge the solid material 9. If the amount of solid material 9 accumulated at the bottom 31 of the cyclone solid-liquid separation unit 30 is less than or equal to a specified value, the bottom control unit 94 closes the control valve 34 to stop the discharge of solid material 9. By controlling the discharge of solid material 9, the heat source water 6 can be flowed with a certain amount of solid material 9 accumulated, allowing the solid material 9 to flow at a high velocity into the heat source water discharge pipe 56 together with the heat source water 6, and washing away scale attached to the heat source water discharge pipe 56.

[0085] Figure 14 shows an example of the operation of the geothermal power plant system 1200 according to the embodiment. The geothermal power plant system 1200 in Figure 14 differs from the geothermal power plant system 1100 in Figure 13 in that it is equipped with a control valve 32. The other components of the geothermal power plant system 1200 in Figure 14 may be the same as those of the geothermal power plant system 1100 in Figure 13. Reference numerals common to both Figure 13 and Figure 14 are omitted from explanation.

[0086] In this example, the bottom control unit 94 controls the control valve 32. In other words, the bottom control unit 94 may function as a flow velocity control unit. The bottom control unit 94 may control the swirling flow velocity of the heat source water 6 based on the amount of solid material 9 deposited at the bottom 31 of the cyclone solid-liquid separation unit 30. For example, if the amount of solid material 9 deposited at the bottom 31 of the cyclone solid-liquid separation unit 30 is greater than or equal to a specified value, the bottom control unit 94 lowers the opening of the control valve 32 to increase the swirling flow velocity of the heat source water 6. By increasing the swirling flow velocity of the heat source water 6, the solid material 9 deposited at the bottom 31 of the cyclone solid-liquid separation unit 30 can be removed. Also, if the amount of solid material 9 deposited at the bottom 31 of the cyclone solid-liquid separation unit 30 is less than or equal to a specified value, the opening of the control valve 32 may be increased to decrease the swirling flow velocity of the heat source water 6.

[0087] Figure 15 shows an example of the operation of the geothermal power plant system 1300 according to the embodiment. The geothermal power plant system 1300 in Figure 15 differs from the geothermal power plant system 200 in Figure 2 in that it is equipped with a chemical injection pump 98 and an inhibitor input unit 102. The geothermal power plant system 1300 in Figure 15 also differs from the geothermal power plant system 200 in Figure 2 in that it is not equipped with a control valve 32, a flow velocity sensor 35, and a flow velocity control unit 52. Other components of the geothermal power plant system 1300 in Figure 15 may be the same as those of the geothermal power plant system 200 in Figure 2. Reference numerals common to both Figure 2 and Figure 15 are omitted from explanation.

[0088] The inhibitor injection unit 102 introduces the inhibitor 104. The inhibitor injection unit 102 may be provided in the heat source water supply pipe 38. The inhibitor 104 may be a chemical solution that suppresses scale particles, such as sulfuric acid. The inhibitor 104 may be a chemical solution that increases the saturation concentration of scale and decreases the degree of supersaturation of scale, such as sodium hydroxide. The inhibitor injection unit 102 may introduce the inhibitor 104 by operating the chemical injection pump 98. By introducing the inhibitor 104, scale deposition may be suppressed. The timing of introducing the inhibitor 104 may be during operation or when the system is stopped.

[0089] Figure 16 shows an example of the operation of the geothermal power plant system 1400 according to the embodiment. The geothermal power plant system 1400 in Figure 16 differs from the geothermal power plant system 200 in Figure 2 in that it is equipped with a low-adhesion material 106. The geothermal power plant system 1400 in Figure 16 also differs from the geothermal power plant system 200 in Figure 2 in that it does not have a control valve 32, a flow velocity sensor 35, and a flow velocity control unit 52. Other components of the geothermal power plant system 1400 in Figure 16 may be the same as those of the geothermal power plant system 200 in Figure 2. Reference numerals common to both Figure 2 and Figure 16 are not explained.

[0090] The low-adhesion material 106 is provided inside the piping of the heat exchange section 50. The low-adhesion material 106 is, for example, carbon steel or stainless steel. It may also be made of resin or the like. By providing the low-adhesion material 106 inside the piping of the heat exchange section 50, scale buildup inside the piping of the heat exchange section 50 can be suppressed.

[0091] Although the present invention has been described above using embodiments, the technical scope of the present invention is not limited to the scope described in the above embodiments. It will be apparent to those skilled in the art that various modifications or improvements can be made to the above embodiments. It will be clear from the claims that such modified or improved forms may also be included in the technical scope of the present invention.

[0092] It should be noted that the execution order of operations, procedures, steps, and stages in the devices, systems, programs, and methods shown in the claims, specifications, and drawings is not explicitly stated as "before," "prior to," etc., and that these can be implemented in any order unless the output of a previous process is used in a later process. Even if the operation flow in the claims, specifications, and drawings is described using phrases such as "first," "next," etc. for convenience, it does not mean that it is essential to perform the operations in that order. [Explanation of Symbols]

[0093] 2...Geothermal fluid, 4...Gaseous substance, 6...Heat source water, 8...Heat transfer medium, 9...Solid substance, 10...Geothermal fluid supply unit, 12...Geothermal fluid supply pipe, 20...Gas-liquid separation unit, 22...Heat source water supply pipe, 30...Cyclone solid-liquid separation unit, 31...Bottom section, 32...Control valve, 33...Side wall, 34...Control valve, 35...Flow velocity sensor, 36...Heat source water discharge pipe, 37...Switching valve, 38...Heat source water supply pipe, 39...Temperature sensor, 40...Water pump, 42...Heat source water discharge pipe, 50...Heat exchange unit, 52...Flow velocity control 54... Heat source water supply pipe, 55... Control valve, 56... Heat source water discharge pipe, 57... Common part, 58... Control valve, 59... Common part, 60... Binary power generation unit, 62... Nozzle, 64... Nozzle, 66... ​​Control valve, 68... Control valve, 70... Operation control unit, 72... Nozzle control unit, 73... Water supply pump, 74... Helical piping, 76... Double piping, 78... Insulation material, 80... Cleaning agent input unit, 81... Cleaning agent, 82... Heating unit, 83... Control valve, 84... Loop control unit, 90... Water supply pump, 9 2··Connecting pipe, 94··Bottom control unit, 96··Stress sensor, 98··Chemical injection pump, 100··Geothermal power plant system, 102··Inhibitor input unit, 104··Inhibitor, 106··Low-adhesion material, 124··Heat exchange unit, 140··Pump, 142··Heat transfer medium supply pipe, 144··Heat transfer medium recovery pipe, 146··Heat transfer medium input unit, 148··Heat source water discharge pipe, 150··Evaporation unit, 160··Binary power generation unit, 200··Geothermal power plant system, 300··Geothermal power plant system, 400· • Geothermal power plant system, 500... Geothermal power plant system, 600... Geothermal power plant system, 700... Geothermal power plant system, 800... Geothermal power plant system, 900... Geothermal power plant system, 1000... Geothermal power plant system, 1100... Geothermal power plant system, 1200... Geothermal power plant system, 1300... Geothermal power plant system, 1400... Geothermal power plant system, 1500... Production well, 1600... Reinjection well

Claims

1. A geothermal power plant system that generates electricity by treating heat source water, A cyclone solid-liquid separation unit for separating the heat source water from the solid substances in the heat source water, A heat exchange unit that exchanges heat with the heat source water from the cyclone solid-liquid separation unit, A flow velocity control unit that controls the swirling flow velocity of the heat source water supplied to the cyclone solid-liquid separation unit, A first pipe for supplying the heat source water, The aforementioned heat source water is supplied to a second pipe, which has a smaller diameter than the first pipe. Equipped with, The flow velocity control unit controls the valve provided in the first pipe and the valve provided in the second pipe. The second pipe is installed above the first pipe. Geothermal power plant system.

2. A geothermal power plant system that generates electricity by treating heat source water, A cyclone solid-liquid separation unit for separating the heat source water from the solid substances in the heat source water, A heat exchange unit that exchanges heat with the heat source water from the cyclone solid-liquid separation unit, A flow velocity control unit that controls the swirling flow velocity of the heat source water supplied to the cyclone solid-liquid separation unit, In the flow path of the heat source water, a water supply pump is provided between the cyclone solid-liquid separation unit and the heat exchange unit, and the water supply pump is provided to supply the heat source water to the heat exchange unit. Equipped with, The water supply pump is controlled to operate based on the swirling flow velocity of the heat source water. Geothermal power plant system.

3. A geothermal power plant system that generates electricity by treating heat source water, A cyclone solid-liquid separation unit for separating the heat source water from the solid substances in the heat source water, A heat exchange unit that exchanges heat with the heat source water from the cyclone solid-liquid separation unit, A flow velocity control unit that controls the swirling flow velocity of the heat source water supplied to the cyclone solid-liquid separation unit, Equipped with, The flow velocity control unit controls the swirling flow velocity of the heat source water based on the amount of solid material deposited at the bottom of the cyclone solid-liquid separation section. Geothermal power plant system.

4. A geothermal power plant system that generates electricity by treating heat source water, A cyclone solid-liquid separation unit for separating the heat source water from the solid substances in the heat source water, A heat exchange unit that exchanges heat with the heat source water from the cyclone solid-liquid separation unit, A flow velocity control unit that controls the swirling flow velocity of the heat source water supplied to the cyclone solid-liquid separation unit, A first pipe for supplying the heat source water, The aforementioned heat source water is supplied to a second pipe, which has a smaller diameter than the first pipe. Equipped with, The flow velocity control unit controls a switching valve to switch whether the heat source water is supplied to the cyclone solid-liquid separation unit from the first pipe or from the second pipe. The second pipe is installed above the first pipe. Geothermal power plant system.

5. The system further comprises a loop control unit that controls a valve to form a loop flow path including at least one of the heat exchange section and the cyclone solid-liquid separation section. A geothermal power plant system according to any one of claims 1 to 4.

6. The loop control unit controls the valve to form the loop flow path which includes the heat exchange unit but does not include the cyclone solid-liquid separation unit. The geothermal power plant system according to claim 5.

7. The loop control unit controls the valve to form the loop flow path, which includes both the heat exchange section and the cyclone solid-liquid separation section. The geothermal power plant system according to claim 5.

8. The aforementioned heat source water flow path further comprises a detergent injection section provided between the cyclone solid-liquid separation section and the heat exchange section for introducing a detergent into the loop flow path. A geothermal power plant system according to any one of claims 5 to 7.

9. The detergent input unit controls the amount of detergent added based on the temperature of the heat source water discharged by the heat exchange unit. The geothermal power plant system according to claim 8.

10. The cyclone solid-liquid separation unit controls the amount of solid material discharged based on the amount of solid material accumulated at the bottom of the cyclone solid-liquid separation unit. A geothermal power plant system according to any one of claims 1 to 9.

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