JP2015052577A - Geothermal power generation steam property monitoring device, geothermal power generation steam property monitoring method, geothermal power generation system, and geothermal power generation system control method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a geothermal power generation steam property monitoring device, a geothermal power generation steam property monitoring method, and a geothermal power generation system control method for removing Sions of sulfur compounds in steam to eliminate obstacles of an analysis so as to enable continuous steam monitoring, and for realizing unmanned monitoring.SOLUTION: A geothermal power generation steam property monitoring device includes: a first cooling unit 14A cooling sampled steam 11A sampled from a steam pipe 12 for supplying steam for geothermal power generation to provide steam drain; an agent supply unit 16 supplying an oxidation agent 15 (for example, sulfuric acid or hydrogen peroxide, described in an embodiment) to the steam drain; a mixer 17 mixing the oxidation agent 15 with the steam drain in a natural accumulation manner; a reaction acceleration device 18 accelerating an oxidation reaction of mixture water 13A in which the oxidation agent 15 is mixed with the steam drain in the natural accumulation manner; a first analyzer 19A analyzing a property of the mixture water 13A after reaction acceleration; and a second analyzer 19B analyzing a property of the steam drain before an adjacent treatment.

Description

  The present invention relates to a steam property monitoring apparatus and method for geothermal power generation, a geothermal power generation system, and a control method for a geothermal power generation system.

  Geothermal power generation uses geothermal steam ejected from production wells using high heat stored in the earth, and introduces it into a steam turbine for power generation. It is regarded as an important energy source after nuclear power.

  Conventionally, as an analysis for steam management of a geothermal power plant, it has been proposed to monitor the content of soluble solids in steam (Patent Document 1).

JP 2002-131261 A

However, since the conventional steam management technique is an analysis of the content of soluble solids in steam, the advent of a continuous steam monitoring device is required, but there are the following problems.
The current steam management analysis is performed by a cooler with a steam drain flow rate of, for example, 500 to 1800 cc / min by constant speed suction according to the steam flow rate from the steam sampling nozzle and the flow rate adjusting valve in the steam pipe at the turbine inlet. Steam is drained (liquefied). The obtained drain sample is collected and analyzed manually in a separate analysis room.

Since the collected vapor drain sample contains sulfides such as H ₂ S and FeS, it is necessary to remove S ²⁻ ions having reducing power as a pretreatment before the analysis operation. is there. This is because, if the S ²⁻ ions are not removed, sulfide which is an analysis interfering substance is generated, and the analysis cannot be performed at all. For example, pH, electrical conductivity, TDS (total dissolved solids), non-condensable gas, etc. in the vapor drain can be measured.

  As a result, there is a problem that, under the present circumstances, there is no method and apparatus for automatically and continuously performing the pretreatment, so that it is practically impossible to monitor steam by continuous monitoring.

In view of the above-mentioned problems, the present invention eliminates S ² -ion of sulfur compounds in the vapor to eliminate the interference of analysis in order to enable continuous vapor monitoring, and realizes monitoring without human intervention. It is an object to provide a steam property monitoring apparatus and method for geothermal power generation, a geothermal power generation system, and a control method for a geothermal power generation system.

  A first invention of the present invention for solving the above-mentioned problems is a first cooler that cools a collected steam collected from a steam pipe that supplies steam for geothermal power generation to form steam drain water, and the steam drain. A chemical supply unit for supplying an oxidizing agent to water, a mixer for mixing the oxidizing agent and the steam drain water, a reaction accelerator for promoting an oxidation reaction of the mixed water in which the oxidizing agent is mixed, and a reaction A steam property monitoring device for geothermal power generation, comprising: a first analyzer that analyzes properties of the mixed water after promotion.

According to the present invention, by supplying the oxidizing agent to the steam drain water and setting the steam drain water to the acidic side, S ²⁻ ions contained in the steam drain water are removed.

  According to a second aspect of the present invention, in the first aspect of the invention, there is provided a steam property monitoring apparatus for geothermal power generation comprising an ejector for extracting and discharging a gas component contained in the steam drain water.

According to the present invention, since the gaseous sulfide component is removed by the ejector, the sulfide component is removed before supplying the chemical, and the supply amount of the oxidizing chemical can be reduced.
(Described in Example: Structure of ejector: FIG. 6)

  According to a third aspect of the present invention, there is provided the steam property monitoring apparatus for geothermal power generation according to the second aspect of the invention, wherein the ejection medium supplied to the ejector is collected steam collected from the steam pipe.

  According to the present invention, by using the collected steam for the ejector, it becomes unnecessary to separately supply the ejection medium for the ejector.

  A fourth invention is the steam property monitoring apparatus for geothermal power generation according to the first invention, wherein the reaction promoting device is a heating device for indirectly heating the mixed water.

  According to this invention, since the mixed water is heated by the high-temperature steam, the oxidation reaction is further promoted and the sulfide component is easily removed.

  A fifth invention is the steam property monitoring apparatus for geothermal power generation according to the first invention, wherein the reaction promoting device has an aeration device for supplying a gas body to a tank bottom and bubbling.

  According to this invention, the gas body is bubbled from the air diffuser at the bottom of the tank, and the dissolved sulfide component is removed together with the gas body.

  A sixth invention is the geothermal heat according to the fourth invention, wherein the reaction promoting device is a heating device, and includes a second cooler that cools the mixed water to room temperature when the mixed water is indirectly heated. It is in the steam property monitoring device for power generation.

  According to the present invention, the heated mixed water can be cooled by the second cooler and prepared for analysis.

  A seventh invention is the steam property monitoring apparatus for geothermal power generation according to any one of the first to sixth inventions, further comprising a second analyzer for analyzing the property of the steam drain water.

According to this invention, before removing S ²⁻ ions contained in the steam drain water, it is possible to determine the vapor properties such as pH.

  The eighth invention is the steam property monitoring apparatus for geothermal power generation according to the second invention, further comprising an ejector on the downstream side of the reaction promoting device.

According to the present invention, by further providing an ejector, residual S ²⁻ ions in the mixed water whose reaction has been promoted by the reaction promoting device are further removed.

  A ninth invention is a steam separator for separating steam from hot water containing steam ejected from a production well, a steam turbine for driving a generator by rotating the turbine with the steam separated by the steam separator, A condenser for condensing steam from the steam turbine to condensate, a cooling tower for cooling the condensed condensate to form cooling water, and supplying steam separated by the brackish water separator to the steam turbine A geothermal power generation system comprising the steam property monitoring device for geothermal power generation according to any one of the first to eighth inventions installed in a steam pipe.

  According to this invention, the property of the steam supplied to the turbine can be monitored.

  A tenth aspect of the present invention is a brackish water separator that separates steam from hot water containing steam ejected from a plurality of production wells, and a steam storage unit that collects and stores the steam separated by the brackish water separator by a steam pipe; , A steam turbine that rotates a turbine by steam from the steam storage unit, drives a generator, a condenser that condenses steam from the steam turbine to condense, and cools the condensed condensate A cooling tower for cooling water, and a steam property monitoring device for geothermal power generation according to any one of the first to eighth inventions installed in a plurality of steam pipes from the plurality of brackish water separators, respectively. The geothermal power generation system is characterized by

  According to this invention, the property of each vapor | steam supplied to a vapor | steam storage part can be monitored.

The eleventh invention uses the ninth or tenth geothermal power generation system, performs online measurement with the steam property monitoring apparatus for geothermal power generation, determines whether the management value is met based on the measurement result, When the result management value is not met, the control method of the geothermal power generation system is characterized by executing any one of the following controls.
1) When steam is supplied from a plurality of production wells, control is performed to reduce or stop the amount of steam supplied from a well having a high concentration of analysis component corresponding to the measurement result.
2) A mist separator is installed on the downstream side of the brackish water separator, and control is performed to increase the amount of water spray supplied to the mist separator.
3) Perform control to perform water cleaning of the turbine nozzle.

  According to this invention, the property of the steam supplied to the turbine is monitored, and stable operation can be realized.

  A twelfth aspect of the invention includes a first cooling step for cooling the collected steam collected from a steam pipe for supplying geothermal power generation steam to make steam drain water, and a chemical supply step for supplying an oxidizing agent to the steam drain water. A mixing step of mixing the oxidizing agent and the steam drain water, a reaction promoting step of promoting an oxidation reaction of the mixed water in which the oxidizing agent is mixed, and a property of the mixed water after the reaction is promoted A steam property monitoring method for geothermal power generation comprising the first analysis step.

According to the present invention, by supplying the oxidizing agent to the steam drain water and setting the steam drain water to the acidic side, S ²⁻ ions contained in the steam drain water are removed.

  A thirteenth invention is the steam property monitoring method for geothermal power generation according to the twelfth invention, further comprising an ejector step of extracting and discharging a gas component contained in the steam drain water.

  According to the present invention, since the gaseous sulfide component is removed in the ejector process, the sulfide component is removed before supplying the chemical, and the supply amount of the oxidizing chemical can be reduced.

  A fourteenth invention is the steam property monitoring method for geothermal power generation according to the thirteenth invention, wherein the ejection medium supplied to the ejector process is a collected steam collected from the steam pipe.

  According to the present invention, by using the collected steam in the ejector process, it becomes unnecessary to separately supply the ejection medium for the ejector.

  A fifteenth aspect of the invention is the steam property monitoring method for geothermal power generation according to the twelfth aspect of the invention, wherein the reaction promoting step indirectly heats the mixed water.

  According to this invention, since the mixed water is heated by the high-temperature steam, the oxidation reaction is further promoted and the sulfide component is easily removed.

  A sixteenth aspect of the invention is the steam property monitoring method for geothermal power generation according to the twelfth aspect of the invention, wherein the reaction promoting step is an air diffusion step in which a gas body is supplied and bubbled.

  According to this invention, a gas body can be bubbled and a dissolved sulfide component can be removed with a gas body.

  According to a seventeenth aspect, in the fifteenth aspect, the reaction promoting step includes a second cooling step for cooling the mixed water to room temperature when the mixed water is indirectly heated. In the monitoring method.

  According to the present invention, the heated mixed water can be cooled by the second cooler and prepared for analysis.

  An eighteenth aspect of the invention is the steam property monitoring method for geothermal power generation according to any one of the twelfth to seventeenth aspects, further comprising a second analysis step of analyzing the property of the steam drain water.

According to this invention, before removing S ²⁻ ions contained in the steam drain water, it is possible to determine the vapor properties such as pH.

According to the present invention, by supplying an oxidizing agent to the steam drain water and setting the steam drain water to the acidic side, S ²⁻ ions contained in the steam drain water are removed, and chemical analysis analysis inhibitors are removed. The analysis of, for example, Cl, SiO ₂ and T-Fe (total iron) in the steam, which is an index of the steam purity, can be continuously measured online.

FIG. 1 is a schematic diagram of a steam property monitoring apparatus for geothermal power generation according to the first embodiment. FIG. 2 is a schematic view of an air diffusion tank that is a reaction promoting device. FIG. 3 is a schematic diagram of a steam property monitoring apparatus for geothermal power generation according to the second embodiment. FIG. 4 is a schematic view of a heating device that is a reaction promoting device. FIG. 5 is a schematic diagram of a steam property monitoring apparatus for geothermal power generation according to the third embodiment. FIG. 6 is a schematic view of the ejector. FIG. 7 is a schematic diagram of another geothermal power generation steam property monitoring apparatus according to the third embodiment. FIG. 8 is a schematic diagram of a geothermal power generation system according to the first embodiment. FIG. 9 is a schematic diagram of another geothermal power generation system according to the first embodiment.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In addition, this invention is not limited by this Example, Moreover, when there exists multiple Example, what comprises combining each Example is also included.

FIG. 8 is a schematic diagram of a geothermal power generation system according to the first embodiment.
As shown in FIG. 8, a geothermal power generation system 50A according to the present embodiment is a single flash type geothermal power generation system, and a brackish water separator 53 that separates steam 11 from hot water 52 containing steam ejected from the production well 51A. And a steam turbine 55 that rotates the turbine by the steam 11 separated by the brackish water separator 53, a steam turbine 55 that drives a generator (not shown), and a condenser 56 that condenses the steam emitted from the steam turbine 55 to form condensate 57. And a cooling tower 59 that cools the condensed condensate 57 and a gas air extractor 63 that extracts the non-condensable gas 62 that is not condensed from the condenser 56. Reference numeral 58 is a condensate pump, 60 is a cooling water, 61 is a cooling water pump, 65 is a hot water tank, 66 is a mist separator, 67 is a generator, 68 is a silencer, and V ₁₁ is a valve.

  The production well 51A is a well that collects natural high-pressure hot water (geothermal steam) from, for example, an underground staying layer (not shown) of high-pressure hot water generated below 500m to 4,000m. Since the pressure of the high-pressure hot water 52 suddenly drops during the rise to the ground where it is collected, a part of it is vaporized into steam, and hot water (liquid) and steam (gas) are mixed on the ground. It is a phase flow. Then, for example, a swirl-type brackish water separator 53 is connected to the rear stage (downstream side) of the production well 51A by piping, and the two-phase flow collected from the production well 51A is heated by hot water (liquid ) 52 and steam (gas) 11, and then the hot water 52 is returned to the hot water reduction well 51 </ b> B via the hot water tank 65 and sent back to the underground stagnant layer as high-pressure hot water. Reused.

  On the other hand, the steam 11 separated from the hot water by the brackish water separator 53 is sent to the mist separator 66 after passing through the steam reservoir 54. In the mist separator 66, the mist (liquid) in the vapor that could not be sufficiently separated in the brackish water separator 53 is removed.

  Thereafter, the steam 11 is sent to the steam turbine 55, and high-pressure steam blown from a turbine nozzle (not shown) inside the steam turbine 55 rotates a turbine blade (not shown) connected to the generator 67. Thus, electric power is generated.

As described above, the geothermal power plant is a plant that generates power by rotating the steam turbine 55 using steam vaporized from high-pressure hot water collected from the underground as a working fluid. The high-pressure hot water collected from the groundwater is generated by the contact and permeation of groundwater to the high-temperature hot rocks in the ground, so various “chemical components” contained in the high-temperature rocks are dissolved in large amounts in the high-pressure hot water. doing.
Therefore, when a part of the high-pressure hot water is vaporized into steam, the “chemical components” in the high-pressure hot water are “sulfur sulfide (H ₂ S), hydrogen chloride (HCl), carbon dioxide (CO ₂ )”, etc. corrosive gas (acidic gas) ", or sodium chloride (NaCl), potassium chloride (KCl), chlorides such as carbonates (neutral salt), an iron compound, as made of SiO ₂ or the like" soluble solids ", It is mixed in the steam together with pure “water vapor (H ₂ O)”.

Therefore, it is necessary to remove S ²⁻ ions having a reducing power contained in the collected vapor 11 as a pretreatment at the time before the analysis operation.

Therefore, in this embodiment, the steam property monitoring apparatus 10A for geothermal power generation that can continuously perform chemical analysis while efficiently removing S ²⁻ ions contained in the steam 11 is separated by brackish water at the upstream side of the turbine. It is installed in the steam pipe 12 on the downstream side of the vessel 53.

  FIG. 1 is a schematic diagram of a steam property monitoring apparatus for geothermal power generation according to the first embodiment. As shown in FIG. 1, the steam property monitoring apparatus 10 </ b> A for geothermal power generation cools the collected steam 11 </ b> A collected from the steam pipe 12 that supplies the steam 11 for geothermal power generation to form steam drain water 13. And the chemical supply unit 16 for supplying the oxidizing agent 15 (for example, sulfuric acid, hydrogen peroxide, etc .: described in the examples) to the steam drain water 13, and the mixture for naturally retaining and mixing the oxidizing agent 15 and the steam drain water 13 A vessel 17, a reaction promoting device 18 that promotes the oxidation reaction of the mixed water 13 </ b> A in which the oxidizing chemical 15 is naturally retained and mixed, a first analyzer 19 </ b> A that analyzes the properties of the mixed water 13 </ b> A after the reaction is promoted, And a second analyzer 19B that analyzes the properties of the previous steam drain water 13.

The first cooler 14A cools the collected steam 11A collected from the steam pipe 12. The collected steam 11A is, for example, 500 at a constant speed according to the flow rate of the steam through the steam sampling valves V ₁ and V ₃ and the flow rate adjusting valve V ₄ from the hole 12b of the steam sampling nozzle 12a in the steam pipe 12 before the turbine entrance. was introduced into the sampling pipe L ₁ in the steam drain flow of ~1800cc / min, it is introduced into the first cooler 14A.
The first cooler 14A is for cooling and condensation of the vapor in the sampling pipe L _1, cooling water is flowed from the bottom, is discharged from the upper end side.

The first cooler 14A steam drain water 13 obtained in the part from the sampling pipe L ₁ is branched, steam drain water 13 that is branched, as a drain analytical sample water 20B of the steam, the second analysis the use pipe L ₂ is introduced into the second analyzer 19B, wherein the chemical analysis is made.

In the second analyzer 19B, for example, the pH, electrical conductivity, total dissolved solids (TDS), and non-condensable gas (NCG) of the steam drain water 13 before removing S ²⁻ ions. Etc. can be measured to determine the vapor properties.
Here, the pH is obtained by measuring with an electrode-type pH meter. The electric conductivity is obtained by measuring electric resistance with an electric conductivity meter. TDS is determined by the evaporation-weight method. The non-condensable gas is obtained by, for example, a gas absorption method or a gas chromatograph method.

In the present embodiment, the oxidizing chemical 15 is supplied from the chemical supply section 16 to the steam drain water 13 obtained by the first cooler 14A.
Examples of the oxidizing agent include hydrogen peroxide (H ₂ O ₂ ) and sulfuric acid (H ₂ SO ₄ ). The supply of hydrogen peroxide (H ₂ O ₂ ) may be either a gas body or a liquid.
S ² -ion components of H ₂ S and FeS in the vapor drain 13 react with H ₂ O ₂ to become H ₂ SO ₄ , and the S component can be removed from the vapor drain 13. Thus, by making the steam drain 13 acidic by using the oxidizing agent 15, the H ₂ S gas contained in the steam is easily released.

Further, since the H ₂ SO ₄ aqueous solution is added to form an H ₂ S gas body and can be separately vaporized and discharged, the S component can be removed from the vapor drain 13.

  The steam drain water 13 mixed with the oxidizing agent 15 is naturally retained and mixed in the mixer 17 interposed in the sampling pipe L1. Thereafter, in the reaction promoting device 18 provided on the downstream side of the mixer 17, the oxidation reaction of the mixed water 13A mixed with the oxidizing agent 15 is promoted.

FIG. 2 is a schematic view of an air diffusion tank that is a reaction promoting device.
As shown in FIG. 2, as the reaction promoting device 18 of the present embodiment, an aeration tank 32 in which an aeration device 31 is arranged at the bottom is used, and mixed water 13A is introduced, and from the aeration device 31 at the bottom. A gas body (for example, nitrogen (N ₂ ), oxygen (O ₂ ), air, etc.) 33 is bubbled. By bubbling the gas body 33, H ₂ S dissolved in the mixed water 13A is accompanied by the gas body 33 and is vaporized and discharged to the outside.

By promoting and completing the oxidation reaction in this reaction promoting device, S ²⁻ ions are removed from the mixed water 13A.

Then, this mixed water 13A as a sample water 20A for drainage analysis of the steam, the first analytical pipe L ₃ is introduced into the first analyzer 19A, wherein the chemical analysis of the steam properties is made. The surplus mixed water 13A is discarded.

In the first analyzer 19A, analysis of Cl, SiO ₂ , and T-Fe in steam, which is an index of steam purity, can be continuously measured online.
The continuous measurement can be performed by, for example, a flow injection analysis (FIA method). In this FIA analysis method, for example, a sample is introduced into a liquid (carrier solution) that flows continuously in a thin tube having an inner diameter of about 1 mm, and mixed with a reaction reagent that flows continuously (specifically reacts with the sample).・ React and analyze.

Cl in the vapor is determined by ion chromatography, absorptiometry, titration, or ion electrode method.
Here, SiO ₂ is determined by absorptiometric analysis. T-Fe is determined by spectrophotometric analysis. Here, for example, the management value is 0.5 ppm or less for Cl, 0.1 ppm or less for SiO ₂ , and 0.1 ppm or less for Fe.

As a result, according to this embodiment, since the disturbance of S ²⁻ ions is removed, the steam purity of the geothermal power plant can be monitored, so that the turbine nozzle (static blade) and turbine (moving blade) can be monitored. Can be reduced, and as a result, a healthy operation of the plant can be realized.

  Next, an example of online control when the geothermal power generation steam property monitoring apparatus 10A is installed in the geothermal power generation system 50A shown in FIG. 8 will be described.

First, chemical analysis is performed by the first analyzer 19A of the steam property monitoring apparatus 10A for geothermal power generation. Chemical analysis is also performed in the second analyzer 19B as necessary. In addition, you may make it analyze with both analyzers.
Based on the data of the analysis result of this chemical analysis, it is judged whether it is suitable for the management value of a plant with an analyzer, and a geothermal power generation system is controlled.

If it does not conform to the management value, execute one of the following controls.
1) When steam 11 is supplied from a plurality of production wells 51A, control is performed to reduce or stop the supply amount of steam from the production well having a high concentration of the analysis component corresponding to the measurement result.
This is because the component composition of the vapor from each well is known in advance, and if the measurement results in sampling from a well with a high concentration of a specific component, the supply of steam from that well is stopped. Or supply is stopped.

2) Increasing the amount of water sprayed on the mist separator 66 increases the droplet size.
Since the mist in the steam 11 contains scale components (such as SiO), the amount of spray in the river introduced into the mist separator is increased, and the mist in the steam is removed, so that the scale components in the brought-in steam The amount (such as SiO) can be reduced.

3) Perform control to perform water cleaning of the turbine nozzle.
For example, when it is determined by measurement that there are many Si components, the turbine nozzle is washed with water. As a result, water washing can be performed from the nozzle cleaning device before the scale components adhere, and scale adhesion can be prevented in advance.

Usually, as a measure against the scale adhesion of the turbine nozzle, water washing is performed by spraying water at the turbine inlet, and the scale is removed after fixing to the turbine nozzle.
In this embodiment, when it is determined that steam with a high risk of scaling is supplied, before adjusting the amount of steam from the production well 51A where the quality of the steam 11 is poor, or during the adjustment, water is supplied to the turbine inlet. By washing and spraying with water, it is possible to implement control that avoids scaling in a pinpoint manner in advance.

FIG. 9 is a schematic diagram of another geothermal power generation system according to the first embodiment.
As shown in FIG. 9, the geothermal power generation system 50B includes a brackish water separator (not shown) that separates steam from hot water containing steam ejected from a plurality of production wells (not shown), and a brackish water separator. The steam storage part 54 that collects and stores the separated steam 11-1 to 11-n, and supplies the steam from the steam storage part 54 to the steam turbine 55, and the steam property for geothermal power generation of this embodiment. Monitoring devices 10-1 to 10-n are respectively provided in steam pipes 12-1 to 12-n of steams 11-1 to 11-n separated from each production well by a brackish water separator.
And the steam state of each production well 51A is individually monitored by the steam property monitoring devices 10-1 to 10-n for geothermal power generation, and used for plant control based on the measured values.

As a result, according to the modification of the present embodiment, since the interference of S ²⁻ ions is removed, the steam purity of the geothermal power plant can be monitored for each steam 11-1 to 11-n of each production well. Thus, by controlling the plant based on this result, scaling to the turbine nozzle (stator blade) and turbine (robot blade) can be reduced. As a result, a sound operation of the plant can be realized.

  Next, a steam property monitoring apparatus for geothermal power generation will be described in Example 2 of the present invention. Below, it demonstrates centering on difference with the steam property monitoring apparatus for geothermal power generation concerning Example 1. FIG. In addition, about the component same as the steam property monitoring apparatus for geothermal power generation concerning Example 1, the same code | symbol is attached | subjected and duplication of description is avoided.

FIG. 3 is a schematic diagram of a steam property monitoring apparatus for geothermal power generation according to the second embodiment. FIG. 4 is a schematic diagram of a heating apparatus that is a reaction promoting apparatus according to the second embodiment.
As shown in FIG. 3, the steam property monitoring apparatus 10B for geothermal power generation according to the present embodiment is not a reaction due to natural residence as in the first embodiment, but a heating apparatus that indirectly heats the mixed water 13A as the reaction promoting apparatus 18. Is used.
As shown in FIG. 4, the reaction promoting device 18 according to the present embodiment is a double structure container composed of an inner cylinder 41 and an outer cylinder 42, and mixed water 13 </ b> A flows into the inner cylinder 41 from the inlet 41 a. Then, the internal mixed water 13A is indirectly heated by the collected steam 11B and discharged from the discharge port 41b. The collected steam 11 flows from the steam inlet 42a, passes between the inner cylinder 41 and the outer cylinder 42, and is discharged from the steam outlet 42b. As a result of the indirect heating by the collected steam 11B, the gas body (containing H ₂ S, etc.) 43 that has been separated into the gas and liquid collected in the head space 41c above the inner cylinder 41 is discharged to the outside through the gas discharge pipe 41d. The discharged gas body 43 is discharged to the cooling tower 59 shown in FIG.

Here, steam for heating, has been collected vapor (temperature 130 to 180 ° C.) taken from the hole 12b of the collection tube 12a from the steam pipe 12 11B using, by operating the valves V ₅ and the valve V ₆ preparative vapor partial And introduced into the reaction promoting device 18. The valve V ₂ is closed to prevent the flow into the sampling pipe L ₁ .

  Moreover, you may make it heat using a heater etc., without using the vapor | steam 11. FIG.

According to the present embodiment, since the mixed water 13A is heated by the high temperature steam 11 in the reaction promoting device 18, the oxidation reaction is further promoted compared to the first embodiment, and S ²⁻ ions are easily removed.

In the present embodiment, since the mixed water 13A is heated by the reaction promoting device 18, it is not suitable for analysis as it is. Therefore, the second cooler 14 </ b> B is provided in the sampling pipe L ₁ on the downstream side of the reaction promoting device 18.

  Therefore, by providing the second cooler 14B, the heated mixed water 13A can be cooled to room temperature and can be prepared for analysis in the first analyzer 19A.

  Next, a steam property monitoring apparatus for geothermal power generation will be described in Example 3 of the present invention. Below, it demonstrates centering on difference with the steam property monitoring apparatus for geothermal power generation which concerns on Example 1 and 2. FIG. In addition, about the component same as the steam property monitoring apparatus for geothermal power generation concerning Example 1, the same code | symbol is attached | subjected and duplication of description is avoided.

FIG. 5 is a schematic diagram of a steam property monitoring apparatus for geothermal power generation according to the third embodiment. FIG. 6 is a schematic diagram of an ejector according to the third embodiment.
As shown in FIG. 5, the geothermal power generation steam property monitoring device 10 </ b> C according to the present embodiment is the same as the geothermal power generation steam property monitoring device 10 </ b> B of the second embodiment, and further includes a first cooler 14 </ b> A, an oxidant supply unit 16, and the like. In between, the ejector 21 is provided.

As shown in FIG. 6, the ejector 21 includes an introduction part 21a for introducing the steam drain water 13, a steam introduction part 21b for introducing the high-temperature / high-pressure sampling steam 11B, a mixing part 21c and a discharge part 21d in which both are mixed. As the pressurized steam is squeezed by the mixing section 21c and the flow rate increases, the pressure decreases (Bernoulli's theorem), and a vacuum is generated, whereby the gas body in the steam is collected steam. The air is extracted by 11A, and H ₂ S gas and CO ₂ gas are accompanied with the collected steam 11B and separated. The discharged gas body 43 is discharged to the cooling tower 59 shown in FIG.
Here, steam ejector has been collected vapor (temperature 130 to 180 ° C.) taken from the hole 12b of the collection tube 12a from the steam pipe 12 11B using, by operating the valves V ₅ and a valve V ₇ preparative vapor partial Then, it is introduced into the steam introduction part 21 b of the ejector 21.

Separation of the gas body by the ejector 21 is about 1/3 of the steam drain water 13, so that the removal by the addition of the oxidizing agent 15 is performed more reliably than in the first embodiment. ^2- Ions can be removed.

According to the present invention, since the S ²⁻ ions are removed as a gas body by the ejector 21, a part of the S ²⁻ ions is removed before supplying the chemical, and the supply amount of the oxidizing chemical 15 is reduced more than in the first embodiment. Can be planned.

  As the fluid of the ejector 21, by using the collected steam 11A, it becomes unnecessary to separately supply the ejector ejection medium.

FIG. 7 is a schematic diagram of another geothermal power generation steam property monitoring apparatus according to the third embodiment.
As shown in the steam property monitoring device 10D for geothermal power generation in FIG. 7, an ejector 21 is further installed on the downstream side of the reaction promoting device 18 so that the reaction in the mixed water 13A in which the reaction is promoted by the reaction promoting device 18 remains. S ²⁻ ions may be further removed.
Here, steam ejector has been collected vapor (temperature 130 to 180 ° C.) taken from the hole 12b of the collection tube 12a from the steam pipe 12 11B using, by operating the valves V ₅ and valve V ₈ preparative vapor partial Then, it is introduced into the steam introduction part 21 b of the ejector 21.

10A to 10D Steam property monitoring device for geothermal power generation 11 Steam 11A Collected steam 12 Steam piping 13 Steam drain water 13A Mixed water 14A First cooler 14B Second cooler 15 Oxidizing agent 16 Drug supply unit 17 Mixer 18 Reaction accelerator 19A 1st analyzer 19B 2nd analyzer L ₁ sampling piping L ₂ 1st analysis piping L ₃ 2nd analysis piping

Claims (18)

A first cooler that cools the collected steam collected from a steam pipe that supplies steam for geothermal power generation into steam drain water;
A chemical supply section for supplying an oxidizing chemical to the steam drain water;
A mixer for mixing the oxidizing agent and the steam drain water;
A reaction promoting device for promoting an oxidation reaction of mixed water mixed with the oxidizing agent;
A steam property monitoring apparatus for geothermal power generation, comprising: a first analyzer that analyzes properties of the mixed water after the reaction is promoted. In claim 1,
A steam property monitoring apparatus for geothermal power generation, comprising an ejector for extracting and discharging a gas component contained in the steam drain water. In claim 2,
A steam property monitoring apparatus for geothermal power generation, wherein the ejection medium supplied to the ejector is a collected steam collected from the steam pipe. In claim 1,
The steam property monitoring device for geothermal power generation, wherein the reaction promoting device is a heating device that indirectly heats the mixed water. In claim 1,
A steam property monitoring device for geothermal power generation, characterized in that the reaction promoting device has an air diffuser for bubbling by supplying a gas body to the bottom of the tank. In claim 4,
A steam property monitoring device for geothermal power generation, wherein the reaction promoting device is a heating device and includes a second cooler that cools the mixed water when the mixed water is indirectly heated. In any one of Claims 1 thru | or 6,
A steam property monitoring device for geothermal power generation, comprising a second analyzer for analyzing the property of the steam drain water. In claim 2,
A steam property monitoring device for geothermal power generation, further comprising an ejector on the downstream side of the reaction promoting device. A brackish water separator for separating steam from hot water containing steam ejected from the production well;
A steam turbine that rotates a turbine with steam separated by the brackish water separator and drives a generator;
A condenser for condensing the steam from the steam turbine into condensate;
A cooling tower that cools the condensed condensate into cooling water,
A geothermal power generation system comprising: the steam property monitoring device for geothermal power generation according to any one of claims 1 to 8 installed in a steam pipe for supplying steam separated by the brackish water separator to a steam turbine. A brackish water separator for separating steam from hot water containing steam ejected from a plurality of production wells;
A steam storage section for collecting and storing the steam separated by the brackish water separator by a steam pipe;
A steam turbine that rotates a turbine with steam from the steam reservoir and drives a generator;
A condenser for condensing the steam from the steam turbine into condensate;
A cooling tower that cools the condensed condensate into cooling water,
A geothermal power generation system comprising: the steam property monitoring device for geothermal power generation according to any one of claims 1 to 8 installed in a plurality of steam pipes from the plurality of brackish water separators. Using the geothermal power generation system of claim 9 or 10,
Perform online measurement with the steam property monitoring device for geothermal power generation, determine whether the control value is suitable based on the measurement result, and if the result does not conform to the management value, control one of the following: The control method of the geothermal power generation system characterized by performing.
1) When steam is supplied from a plurality of production wells, control is performed to reduce or stop the amount of steam supplied from a well having a high concentration of analysis component corresponding to the measurement result.
2) A mist separator is installed on the downstream side of the brackish water separator, and control is performed to increase the amount of water spray supplied to the mist separator.
3) Perform control to perform water cleaning of the turbine nozzle. A first cooling step for cooling the collected steam collected from the steam pipe supplying the steam for geothermal power generation into steam drain water;
A chemical supply step of supplying an oxidizing chemical to the steam drain water;
A mixing step of mixing the oxidizing agent and the steam drain water;
A reaction promoting step of promoting an oxidation reaction of the mixed water mixed with the oxidizing agent;
A steam property monitoring method for geothermal power generation, comprising: a first analysis step of analyzing the property of the mixed water after the reaction is promoted. In claim 12,
A steam property monitoring method for geothermal power generation, comprising an ejector step of extracting and discharging a gas component contained in the steam drain water. In claim 13,
A steam property monitoring method for geothermal power generation, wherein the ejection medium supplied to the ejector process is a collected steam collected from the steam pipe. In claim 12,
The steam property monitoring method for geothermal power generation, wherein the reaction promoting step indirectly heats the mixed water. In claim 12,
The method for monitoring steam properties for geothermal power generation, wherein the reaction promoting step is a gas diffusion step of supplying a gas body to bubble inside. In claim 15,
A steam property monitoring method for geothermal power generation, wherein the reaction promoting step includes a second cooling step for cooling the mixed water when the mixed water is indirectly heated. In any one of Claims 12 thru | or 17,
A steam property monitoring method for geothermal power generation, comprising a second analysis step of analyzing the property of the steam drain water.

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